Mechanical property testing device for carbon nanotube fiber concrete
Patent Information
- Application Number
- CN202522351804.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-06
AI Technical Summary
[0002]混凝土材料由于具有抗压强度高、耐久性能好、价格低廉等特点，被广泛应用在各类工程结构当中，然而普通的混凝土是一种准脆性材料，其抗拉和抗裂能力较低，在复杂的环境或应力条件下容易产生开裂，从而降低工程结构的稳定性和安全性，但是现有的混凝土用力学检测装置不具备调节检测位置的功能，在面对一些大型混凝土构件，如桥梁的箱梁、建筑的基础承台时，由于构件尺寸较大，不同部位的混凝土在浇筑过程中可能受到原材料分布不均、振捣密实度差异等因素的影响，其力学性能存在一定的离散性
[0012]本实用新型通过工作箱顶部两侧固定安装的电机，其输出端带动螺纹杆转动时，可驱动螺纹套沿螺纹杆上下移动，进而带动与螺纹套连接的框架同步升降，该结构能根据碳纳米管纤维混凝土试件的高度尺寸，灵活调整框架及下方下压板的初始高度，解决了传统装置难以适配不同厚度试件检测的问题，扩大了装置的检测适用范围，框架内壁左端固定的第一电动伸缩杆可推动滑环沿光杆水平滑动，而滑环底部通过支架连接的下压板会随滑环同步移动，该设计能精准调整下压板在水平方向的检测位置，可对碳纳米管纤维混凝土试件的不同区域进行力学性能检测，避免了传统装置检测位置固定导致的检测盲区，提升了检测结果的全面性与准确性，工作箱内腔底部的减震箱中，导杆表面滑动安装的导块配合两侧套设的弹簧，在试件受压检测产生冲击力时，横板会通过支撑杆将压力传递至活动板，活动板推动导块沿导杆滑动并挤压弹簧，弹簧的弹性形变可有效吸收冲击能量，该减震结构能减少检测过程中冲击力对碳纳米管纤维混凝土试件的意外损伤，同时避免冲击力对工作箱内部电机、螺纹杆等精密部件造成损耗，延长装置使用寿命。
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Figure CN224906454U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete technology, specifically to a device for testing the mechanical properties of carbon nanotube fiber concrete. Background Technology
[0002] Concrete is widely used in various engineering structures due to its high compressive strength, good durability, and low price. However, ordinary concrete is a quasi-brittle material with low tensile and crack resistance. It is prone to cracking under complex environments or stress conditions, which reduces the stability and safety of engineering structures. However, existing concrete mechanical testing devices do not have the function of adjusting the testing position. When dealing with some large concrete components, such as bridge box girders and building foundations, the mechanical properties of concrete in different parts may be affected by factors such as uneven distribution of raw materials and differences in compaction during the pouring process due to the large size of the components. Utility Model Content
[0003] The purpose of this invention is to provide a device for testing the mechanical properties of carbon nanotube fiber concrete, which has the advantage of automatically adjusting the testing position.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a mechanical property testing device for carbon nanotube fiber concrete, comprising a working box, motors fixedly installed on both sides of the top of the working box, a threaded rod fixedly installed at the output end of the motor, a threaded sleeve threaded on the front surface of the threaded rod, a frame fixedly installed at one end of the threaded sleeve that is close to each other, a first electric telescopic rod fixedly installed on the left end of the inner wall of the frame, a smooth rod fixedly installed on the lower end of the inner wall of the frame, a slip ring slidably installed on the front surface of the smooth rod, a lower pressure plate fixedly installed at the bottom of the slip ring by a bracket, a shock-absorbing box fixedly installed at the bottom of the inner cavity of the working box, a guide rod fixedly installed at the lower end of the inner cavity of the shock-absorbing box, a guide block slidably installed on the front surface of the guide rod, springs sleeved on both sides of the front surface of the guide rod, a movable plate movably installed on the front surface of the guide block, a horizontal plate movably installed on the top of the movable plate, and a support rod fixedly installed on the top of the horizontal plate.
[0005] As a preferred embodiment, the work box has doors movably installed on both sides of its front surface, and handles are fixedly installed on the ends of the front surfaces of the doors that are close to each other.
[0006] As a preferred embodiment, a base is fixedly installed at the bottom of the work box, and support columns are fixedly installed around the bottom of the base.
[0007] As a preferred embodiment, guide rails are fixedly installed on both sides of the inner cavity of the work box, and the inner cavities of the guide rails are fixedly installed at the ends of the threaded sleeves that are far apart from each other by guide rods.
[0008] As a preferred embodiment, a support frame is fixedly installed on the top of the support rod, and a second electric telescopic rod is fixedly installed on both sides of the inner wall of the support frame. A clamp is fixedly installed on the output end of the second electric telescopic rod.
[0009] As a preferred embodiment, limit rods are fixedly installed on both sides of the top of the shock absorber box cavity, and the front surface of the limit rods is fixedly installed on both sides of the horizontal plate by limit blocks.
[0010] As a preferred embodiment, the bottom of the inner cavity of the shock absorber box is provided with a sliding groove, and the inner cavity of the sliding groove is fixedly installed on the bottom of the guide block by a slider.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] This invention utilizes motors fixedly installed on both sides of the top of the working box. When the output end of the motor drives the threaded rod to rotate, it drives the threaded sleeve to move up and down along the threaded rod, thereby synchronously raising and lowering the frame connected to the threaded sleeve. This structure allows for flexible adjustment of the initial height of the frame and the lower pressure plate according to the height dimensions of the carbon nanotube fiber concrete specimen, solving the problem of traditional devices being unable to adapt to the testing of specimens of different thicknesses and expanding the device's testing applicability. The first electric telescopic rod fixed to the left end of the inner wall of the frame can push the slip ring to slide horizontally along the smooth rod, while the lower pressure plate connected to the bottom of the slip ring via a bracket moves synchronously with the slip ring. This design allows for precise adjustment of the lower pressure plate's horizontal testing position, enabling precise testing of carbon nanotube fibers. Mechanical property testing is performed on different areas of the concrete specimen, avoiding blind spots caused by fixed testing positions in traditional devices, thus improving the comprehensiveness and accuracy of the test results. In the shock-absorbing box at the bottom of the working chamber, guide blocks slidably mounted on the guide rod surface, together with springs sleeved on both sides, transmit pressure to the movable plate through the support rod when the specimen is subjected to pressure testing and impact force is generated. The movable plate pushes the guide block to slide along the guide rod and compresses the spring. The elastic deformation of the spring can effectively absorb the impact energy. This shock-absorbing structure can reduce accidental damage to the carbon nanotube fiber concrete specimen by impact force during the testing process, while avoiding wear and tear on precision components such as motors and threaded rods inside the working chamber, thus extending the service life of the device. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a cross-sectional view of the working box structure of this utility model;
[0015] Figure 3 This is a cross-sectional view of the shock absorber box structure of this utility model;
[0016] Figure 4 This is an enlarged view of section A of this utility model.
[0017] In the diagram: 1. Working box; 2. Motor; 3. Box door; 4. Handle; 5. Base; 6. Threaded rod; 7. Threaded sleeve; 8. Slip ring; 9. Shock absorber box; 10. Frame; 11. Smooth rod; 12. Lower pressure plate; 13. First electric telescopic rod; 14. Horizontal plate; 15. Spring; 16. Guide rod; 17. Guide block; 18. Movable plate; 19. Support rod; 20. Support frame; 21. Second electric telescopic rod; 22. Clamping device. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0020] Example 1:
[0021] Please see Figures 1-3 As shown, this utility model provides a mechanical property testing device for carbon nanotube fiber concrete, including a working box 1. Motors 2 are fixedly installed on both sides of the top of the working box 1. A threaded rod 6 is fixedly installed at the output end of the motor 2. A threaded sleeve 7 is threaded onto the front surface of the threaded rod 6. A frame 10 is fixedly installed at one end of the threaded sleeve 7 that is close to each other. A first electric telescopic rod 13 is fixedly installed on the left end of the inner wall of the frame 10. A smooth rod 11 is fixedly installed at the lower end of the inner wall of the frame 10. A slip ring 8 is slidably installed on the front surface of the smooth rod 11. A lower pressure plate 12 is fixedly installed at the bottom of the slip ring 8 via a bracket. A shock-absorbing box 9 is fixedly installed at the bottom of the inner cavity of the working box 1. A guide rod 16 is fixedly installed at the lower end of the inner cavity of the shock-absorbing box 9. A guide block 17 is slidably installed on the front surface of the guide rod 16. Springs 15 are sleeved on both sides of the front surface of the guide rod 16. A movable plate 18 is movably installed on the front surface of the guide block 17. A horizontal plate 14 is movably installed on the top of the movable plate 18. A support rod 19 is fixedly installed on the top of the horizontal plate 14.
[0022] This technical solution utilizes motors 2 fixedly installed on both sides of the top of the working box 1. When the output end of the motor drives the threaded rod 6 to rotate, it drives the threaded sleeve 7 to move up and down along the threaded rod 6, thereby causing the frame 10 connected to the threaded sleeve 7 to rise and fall synchronously. This structure can flexibly adjust the initial height of the frame 10 and the lower pressure plate 12 according to the height of the carbon nanotube fiber concrete specimen, solving the problem that traditional devices are difficult to adapt to the testing of specimens of different thicknesses, and expanding the testing application range of the device. The first electric telescopic rod 13 fixed to the left end of the inner wall of the frame 10 can push the slip ring 8 to slide horizontally along the smooth rod 11, and the lower pressure plate 12 connected to the bottom of the slip ring 8 through the bracket will move synchronously with the slip ring 8. This design can accurately adjust the horizontal testing position of the lower pressure plate 12, which can be used for the testing of carbon nanotube fiber concrete specimens. Mechanical property testing is performed on different areas of the concrete specimen, avoiding blind spots caused by fixed testing positions in traditional devices, thus improving the comprehensiveness and accuracy of the test results. In the shock-absorbing box 9 at the bottom of the inner cavity of the working box 1, the guide block 17, which is slidably installed on the surface of the guide rod 16, works in conjunction with the springs 15 on both sides. When the specimen is subjected to pressure testing and an impact force is generated, the horizontal plate 14 will transmit the pressure to the movable plate 18 through the support rod 19. The movable plate 18 pushes the guide block 17 to slide along the guide rod 16 and squeeze the spring 15. The elastic deformation of the spring 15 can effectively absorb the impact energy. This shock-absorbing structure can reduce the accidental damage to the carbon nanotube fiber concrete specimen by the impact force during the testing process, and at the same time avoid the impact force from causing wear and tear on precision components such as the motor 2 and threaded rod 6 inside the working box 1, thus extending the service life of the device.
[0023] Example 2:
[0024] Based on Embodiment 1, this utility model is as follows: Figure 1 and Figure 2 As shown, both sides of the front surface of the work box 1 are movably installed with doors 3. The ends of the front surfaces of the doors 3 that are close to each other are fixedly installed with handles 4. The bottom of the work box 1 is fixedly installed with a base 5. Support columns are fixedly installed around the bottom of the base 5. Guide rails are fixedly installed on both sides of the inner cavity of the work box 1. The inner cavities of the guide rails are fixedly installed on the ends of the threaded sleeves 7 that are far apart from each other through guide rods.
[0025] By adopting the above technical solution, the setting of the box door 3 and handle 4 facilitates the user to carry out daily maintenance of the work box 1. The setting of the base 5 and support column achieves the effect of supporting the whole. The setting of the guide rail and guide rod achieves the effect of limiting the threaded sleeve 7.
[0026] Example 3:
[0027] This utility model is as follows Figures 2-4As shown, a support frame 20 is fixedly installed on the top of the support rod 19. A second electric telescopic rod 21 is fixedly installed on both sides of the inner wall of the support frame 20. A clamp 22 is fixedly installed at the output end of the second electric telescopic rod 21. Limiting rods are fixedly installed on both sides of the top of the shock absorber box 9. The front surface of the limiting rod is fixedly installed on both sides of the horizontal plate 14 through the limiting block. A sliding groove is opened at the bottom of the shock absorber box 9. The inner cavity of the sliding groove is fixedly installed on the bottom of the guide block 17 through the slider.
[0028] By adopting the above technical solution, the setting of the limiting rod and the limiting block achieves the effect of guiding the horizontal plate 14, the setting of the second electric telescopic rod 21 and the clamping device 22 achieves the effect of clamping and limiting the carbon nanotubes, and the setting of the sliding groove and the slider achieves the effect of guiding the guide block 17.
[0029] The working principle of this utility model is as follows: First, the carbon nanotube fiber concrete specimen to be tested is placed on top of the horizontal plate 14 above the shock-absorbing box 9 at the bottom of the inner cavity of the working box 1. The support rod 19 fixed at the bottom of the horizontal plate 14 provides stable support for the specimen and provides basic support for subsequent mechanical performance testing. The motors 2 fixedly installed on both sides of the top of the working box 1 are started. The output end of the motor 2 drives the threaded rod 6 to rotate. Since the threaded sleeve 7 is threadedly engaged with the threaded rod 6, the rotation of the threaded rod 6 is converted into the linear up-and-down movement of the threaded sleeve 7 along the threaded rod 6. This, in turn, drives the frame 10, which is fixed close to one end of the threaded sleeve 7, to rise and fall synchronously until the lower pressure plate 12 below the frame 10 is adjusted to the initial testing height that matches the top of the specimen. The height adjustment is completed. Then, the first electric telescopic rod 13 fixedly installed on the left end of the inner wall of the frame 10 is started. The telescopic end of the first electric telescopic rod 13 pushes the slip ring 8 connected to it along the lower end of the inner wall of the frame 10. The smooth rod 11 slides horizontally. Since the bottom of the slip ring 8 is fixedly connected to the lower pressure plate 12 through the bracket, the horizontal movement of the slip ring 8 will drive the lower pressure plate 12 to move synchronously until the lower pressure plate 12 moves precisely to the horizontal area of the specimen to be tested, completing the horizontal position adjustment. After the test position is adjusted, the lower pressure plate 12 applies pressure to the specimen to perform mechanical property testing. The impact force generated during the test will be transmitted to the horizontal plate 14 through the specimen. The horizontal plate 14 transmits the impact force to the movable plate 18 at the bottom. The movable plate 18 pushes the guide blocks 17, which are movably connected at both ends, to slide to both sides along the guide rod 16 fixed at the lower end of the inner cavity of the shock absorber 9. When the guide blocks 17 slide, they squeeze the springs 15 sleeved on both sides of the surface of the guide rod 16. The springs 15 undergo elastic deformation to absorb the impact energy, realize shock absorption and buffering, avoid damage to the specimen and device components caused by the impact force, and at the same time ensure the stable operation of the test process and ensure the accuracy of the mechanical property test data.
[0030] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0031] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A device for testing the mechanical properties of carbon nanotube fiber concrete, comprising a working chamber (1), characterized in that: Motors (2) are fixedly installed on both sides of the top of the work box (1). A threaded rod (6) is fixedly installed at the output end of the motor (2). A threaded sleeve (7) is threaded on the front surface of the threaded rod (6). A frame (10) is fixedly installed at one end of the threaded sleeve (7) that is close to each other. A first electric telescopic rod (13) is fixedly installed on the left end of the inner wall of the frame (10). A smooth rod (11) is fixedly installed on the lower end of the inner wall of the frame (10). A slip ring (8) is slidably installed on the front surface of the smooth rod (11). The bottom of the slip ring (8) is open to the air. A lower pressure plate (12) is fixedly installed on the bracket. A shock absorber box (9) is fixedly installed at the bottom of the inner cavity of the working box (1). A guide rod (16) is fixedly installed at the lower end of the inner cavity of the shock absorber box (9). A guide block (17) is slidably installed on the front surface of the guide rod (16). Springs (15) are sleeved on both sides of the front surface of the guide rod (16). A movable plate (18) is movably installed on the front surface of the guide block (17). A horizontal plate (14) is movably installed on the top of the movable plate (18). A support rod (19) is fixedly installed on the top of the horizontal plate (14).
2. The mechanical property testing device for carbon nanotube fiber concrete according to claim 1, characterized in that: Both sides of the front surface of the work box (1) are movably installed with box doors (3), and a handle (4) is fixedly installed at one end of the front surface of the box doors (3) that is close to each other.
3. The mechanical property testing device for carbon nanotube fiber concrete according to claim 1, characterized in that: The bottom of the work box (1) is fixedly installed with a base (5), and support columns are fixedly installed around the bottom of the base (5).
4. The mechanical property testing device for carbon nanotube fiber concrete according to claim 1, characterized in that: The inner sides of the working box (1) are fixedly installed with guide rails, and the inner cavities of the guide rails are fixedly installed at the ends of the threaded sleeve (7) that are far apart from each other by guide rods.
5. The mechanical property testing device for carbon nanotube fiber concrete according to claim 1, characterized in that: A support frame (20) is fixedly installed on the top of the support rod (19), and a second electric telescopic rod (21) is fixedly installed on both sides of the inner wall of the support frame (20). A clamp (22) is fixedly installed at the output end of the second electric telescopic rod (21).
6. The mechanical property testing device for carbon nanotube fiber concrete according to claim 1, characterized in that: Limiting rods are fixedly installed on both sides of the top of the inner cavity of the shock absorber box (9), and the front surface of the limiting rods is fixedly installed on both sides of the horizontal plate (14) by limiting blocks.
7. The mechanical property testing device for carbon nanotube fiber concrete according to claim 1, characterized in that: The bottom of the inner cavity of the shock absorber box (9) is provided with a sliding groove, and the inner cavity of the sliding groove is fixedly installed on the bottom of the guide block (17) by a slider.