Cracking protection device for tensile test

Abstract

The utility model discloses a cracking protection device for a tensile test, which comprises an upper cover casing sleeved outside an upper clamp, the front surface and the bottom surface of the upper cover casing are opened, and the two sides and the back surface of the upper cover casing are attached to the upper clamp; the lower housing sleeves the lower clamp, the front surface and the top surface of the lower housing are open, and two sides and the back surface of the lower housing are attached to the lower clamp; an opening is formed in the front face of the telescopic protective sleeve, and the telescopic protective sleeve is detachably arranged between the upper cover shell and the lower cover shell and covers a joint between the upper cover shell and the lower cover shell; one end of the transparent baffle is hinged to the top of the upper housing. When the device is used, the upper clamp and the lower clamp are completely covered by a whole formed by the transparent baffle, the upper cover shell, the lower cover shell and the telescopic protective sleeve, when a tensile test is carried out, the upper clamp and the lower clamp generate relative movement in the vertical direction, the telescopic protective sleeve stretches out and draws back along with the upper clamp and the lower clamp, and the transparent baffle moves along with the telescopic protective sleeve; under the blocking effect of the structure, fragments generated by cracking are completely covered in the structure and cannot splash to the outside.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing technology, specifically to a fracture protection device for tensile testing. Background Technology

[0002] The ring specimen tensile strength test is an important method for evaluating the tensile properties of composite pipes or ring-shaped components. This standard test method, based on specific specifications, determines the ultimate tensile strength by gradually applying axial tensile force until the specimen breaks. This test is indispensable for the research and development of new materials, quality control, and structural design.

[0003] However, in practice, the failure mode of toroidal specimens presents significant safety and environmental challenges. Due to the unique stress distribution of the toroidal structure under load, when the specimen reaches its ultimate strength and fails, it often experiences explosive failure along the circumference. This failure mode not only causes the specimen itself to shatter into small fragments, but also, due to the lightweight nature of the fibrous material, these fragments diffuse outward with high kinetic energy. Such debris clouds can rapidly permeate the entire laboratory space, causing pollution problems and affecting the cleanliness and safety of the experimental environment.

[0004] In particular, when carbon fiber reinforced composites are involved, the resulting debris, in addition to the hazards mentioned above, is highly conductive. Once these tiny, charged fibers enter the interior of precision electronic equipment, they can cause short circuits or other circuit malfunctions, posing a potential threat to laboratory instruments and even leading to serious consequences such as data loss or equipment damage.

[0005] Therefore, this application proposes a fracture protection device for tensile testing to solve the above-mentioned technical problems. Utility Model Content

[0006] The main purpose of this invention is to address the above-mentioned shortcomings and provide a fracture protection device for tensile testing, which effectively captures and limits the debris generated by fracture without interfering with the testing process, thereby ensuring the safety and reliability of the test.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A fracture protection device for tensile testing includes: an upper cover fitted over an upper clamp, with openings on the front and bottom, and sides and back fitting against the upper clamp; a lower cover fitted over a lower clamp, with openings on the front and top, and sides and back fitting against the lower clamp; a telescopic protective sleeve with an opening on the front and detachably disposed between the upper and lower covers, covering the seam between the upper and lower covers; and a transparent baffle hinged at one end to the top of the upper cover, used to simultaneously block the front openings of the upper cover, the lower cover, and the telescopic protective sleeve.

[0009] Furthermore, the bottom end of the transparent baffle is lower than the bottom end of the lower cover.

[0010] Furthermore, a mounting post is fixedly provided at the bottom of the lower cover, and a stud is fixedly provided on the mounting post. The bottom of the transparent baffle has an elongated through hole that is inserted and matched with the stud. The stud is locked by hand-tightening a nut after passing through the through hole.

[0011] Furthermore, the top end of the upper cover and the bottom end of the lower cover are provided with through holes for connecting the connecting shafts of the upper clamp and the lower clamp, respectively.

[0012] Furthermore, the upper cover has multiple mounting holes on both sides for inserting screws, and the upper clamp has threaded holes on both sides that correspond one-to-one with the mounting holes. The screws pass through the mounting holes and are screwed into the threaded holes to fix the upper cover on the upper clamp. The lower cover is fixed to the lower clamp in the same way.

[0013] Furthermore, the bottom end of the upper cover and the top end of the lower cover are provided with mounting skirts, and the upper and lower ends of the telescopic protective sleeve are fixed to the mounting skirts by bolts.

[0014] The beneficial effects of this utility model are reflected in:

[0015] This invention involves covering the upper and lower clamps with an upper and lower cover, and setting a telescopic protective cover between the upper and lower covers. A transparent baffle is hinged to the top of the upper cover. The upper and lower clamps are completely covered by the whole consisting of the transparent baffle, the upper cover, the lower cover, and the telescopic protective cover. During the tensile test, the upper and lower clamps move relative to each other in the vertical direction, and the telescopic protective cover extends and retracts accordingly. The transparent baffle also moves accordingly, allowing real-time observation of the tensile state of the annular specimen through the transparent baffle. When the annular specimen breaks due to overstretching, the fragments generated by the breakage are completely covered by the blocking effect of the transparent baffle, the upper cover, the lower cover, and the telescopic protective cover, preventing them from flying outwards. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the usage state of an embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of the overall structure of an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of a transparent baffle flipping up according to an embodiment of the present invention;

[0020] Figure 4 This is a half-sectional schematic diagram of the main structure of an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the rear structure of an embodiment of the present invention.

[0022] In the diagram: 1. Upper cover; 2. Lower cover; 3. Upper clamp; 4. Lower clamp; 5. Telescopic protective sleeve; 6. Transparent baffle; 7. Mounting post; 8. Stud; 9. Through hole; 10. Hand-tightening nut; 11. Through hole; 12. Connecting shaft; 13. Screw; 14. Mounting hole; 15. Threaded hole; 16. Mounting skirt. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figure 1-5 As shown, this utility model provides a fracture protection device for tensile testing, comprising: an upper cover 1, which is fitted outside the upper clamp 3, with openings on the front and bottom, and the sides and back fitting against the upper clamp 3; a lower cover 2, which is fitted outside the lower clamp 4, with openings on the front and top, and the sides and back fitting against the lower clamp 4; a telescopic protective sleeve 5, which is open on the front and detachably disposed between the upper cover 1 and the lower cover 2, covering the seam between the upper cover 1 and the lower cover 2; and a transparent baffle 6, which is hinged at one end to the top of the upper cover 1, for simultaneously sealing the front openings of the upper cover 1, the lower cover 2, and the telescopic protective sleeve 5.

[0025] When installing the annular sample on the upper clamp 3 and lower clamp 4, the transparent baffle 6 is flipped up along the hinge axis to expose the upper clamp 3 and lower clamp 4 for easy installation. After installation, the transparent baffle 6 is flipped down so that it abuts against the front opening of the upper cover 1, lower cover 2 and telescopic protective sleeve 5. At this time, the upper clamp 3 and lower clamp 4 are completely covered by the whole consisting of the transparent baffle 6, the upper cover 1, the lower cover 2 and the telescopic protective sleeve 5. During the tensile test, the upper clamp 3 and lower clamp 4 move relative to each other in the vertical direction, and the telescopic protective sleeve 5 extends and retracts accordingly. The transparent baffle 6 also moves accordingly, allowing real-time observation of the tensile state of the annular sample through the transparent baffle 6. When the annular sample breaks due to overstretching, the fragments generated by the breakage are completely covered by the blocking effect of the transparent baffle 6, the upper cover 1, the lower cover 2 and the telescopic protective sleeve 5, preventing them from splashing to the outside.

[0026] In one embodiment, the bottom end of the transparent baffle 6 is lower than the bottom end of the lower cover 2.

[0027] During the tensile test, the upper clamp 3 and the lower clamp 4 will have relative displacement in the vertical direction. During this movement, the transparent baffle 6 will continuously move upward relative to the lower cover 2. This design ensures that the transparent baffle 6 always blocks the front opening of the lower cover 2 during the movement, preventing the annular sample from splashing out from the gap between the two.

[0028] In one embodiment, a mounting post 7 is fixedly provided at the bottom of the lower cover 2, and a stud 8 is fixedly provided on the mounting post 7. The bottom of the transparent baffle 6 is provided with an elongated through hole 9 that is inserted and matched with the stud 8. The stud 8 is locked by a hand-tightening nut 10 after passing through the through hole 9.

[0029] With this design, after the annular sample is installed, the transparent baffle 6 is flipped down so that the elongated through hole 9 is inserted into the stud 8, and the hand-tightening nut 10 is screwed into the stud 8 until the hand-tightening nut 10 abuts against the transparent baffle 6. At this point, even if the transparent baffle 6 is impacted by fragments generated after the annular sample breaks, it cannot rotate around its hinge axis and will always be in close contact with the front openings of the upper cover 1, the lower cover 2, and the telescopic protective sleeve 5 to prevent the fragments from scattering outwards.

[0030] In one embodiment, the top end of the upper cover 1 and the bottom end of the lower cover 2 are provided with through holes 11, which are used to pass through the connecting shafts 12 of the upper clamp 3 and the lower clamp 4, respectively.

[0031] This design facilitates the connection between the cover and the clamp.

[0032] In one embodiment, the upper cover 1 has multiple mounting holes 14 on both sides for inserting screws 13, and the upper clamp 3 has threaded holes 15 on both sides corresponding to the mounting holes 14. The screws 13 pass through the mounting holes 14 and are screwed into the threaded holes 15 to fix the upper cover 1 on the upper clamp 3. The fixing method between the lower cover 2 and the lower clamp 4 is the same.

[0033] This design uses screw 13 to fix the cover and clamp, making disassembly and assembly convenient.

[0034] In one embodiment, the bottom end of the upper cover 1 and the top end of the lower cover 2 are provided with mounting skirts 16, and the upper and lower ends of the telescopic protective sleeve 5 are fixed to the mounting skirts 16 by bolts.

[0035] With this design, the telescopic protective sleeve 5 is fixed stably and reliably, has good sealing between itself and the upper cover 1 and the lower cover 2, and is easy to disassemble and assemble, and can be disassembled regularly to clean up the debris accumulated inside.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0037] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A chipping protection device for tensile testing, characterized in that, include: The upper cover (1) is fitted outside the upper clamp (3), with openings on the front and bottom, and the sides and back are fitted to the upper clamp (3); the lower cover (2) is fitted outside the lower clamp (4), with openings on the front and top, and the sides and back are fitted to the lower clamp (4). The telescopic protective sleeve (5) is open on the front and detachably disposed between the upper cover (1) and the lower cover (2), covering the seam between the upper cover (1) and the lower cover (2); A transparent baffle (6) is hinged at one end to the top of the upper cover (1) and is used to simultaneously block the front openings of the upper cover (1), the lower cover (2) and the telescopic protective sleeve (5).

2. The fracture protection device for tensile testing as described in claim 1, characterized in that, The bottom of the transparent baffle (6) is lower than the bottom of the lower cover (2).

3. The fracture protection device for tensile testing as described in claim 2, characterized in that, The bottom end of the lower cover (2) is fixedly provided with a mounting post (7), and a stud (8) is fixedly provided on the mounting post (7). The bottom of the transparent baffle (6) is provided with a long strip-shaped through hole (9) that is inserted and matched with the stud (8). After the stud (8) passes through the through hole (9), it is locked with a hand-tightening nut (10).

4. The fracture protection device for tensile testing as described in claim 3, characterized in that, The top end of the upper cover (1) and the bottom end of the lower cover (2) are provided with through holes (11) for connecting the connecting shafts (12) of the upper clamp (3) and the lower clamp (4) respectively.

5. A fracture protection device for tensile testing as described in claim 4, characterized in that, The upper cover (1) has multiple mounting holes (14) on both sides for inserting screws (13). The upper clamp (3) has threaded holes (15) on both sides that correspond one-to-one with the mounting holes (14). The screws (13) pass through the mounting holes (14) and are screwed into the threaded holes (15) to fix the upper cover (1) on the upper clamp (3). The fixing method between the lower cover (2) and the lower clamp (4) is the same.

6. A fracture protection device for tensile testing as described in claim 5, characterized in that, The bottom end of the upper cover (1) and the top end of the lower cover (2) are provided with mounting skirts (16), and the upper and lower ends of the telescopic protective sleeve (5) are fixed to the mounting skirts (16) by bolts.

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