Tensile test device for cement-based composite material

Abstract

The utility model discloses a cement-based composite material tensile test device which comprises a test box body, a drawing test structure is arranged in the test box body, and a protective observation structure is movably hinged to the upper end of the test box body; the drawing experiment structure comprises two fixed limiting rods, two movable platforms, two operation frames, two screw rods, four guide rods, four clamping pieces, a driving assembly and four buffer assemblies. The utility model relates to the technical field of cement-based composite material detection, in particular to a pull-out test structure, a plurality of clamping pieces are adopted to fix a material, the positions and the clamping force of the clamping pieces can be fully adjusted according to different material specifications, the tensile detection range of a cement-based composite material can be effectively increased, and the detection accuracy of the cement-based composite material is improved. And the overall specification of the clamping piece is increased, the contact area between the clamping piece and the cement-based composite material can be effectively increased, and the overall fixing effect of the cement-based composite material is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cement-based composite material detection, in particular to a cement-based composite material tensile test device. Background Art

[0002] Cement-based composites are composite materials composed of cement matrix and other reinforcing materials (such as fibers, particles, etc.). Tensile testing is one of the common methods to evaluate the performance of materials under tension;

[0003] The current tensile testing device for cement-based composite materials needs to select materials of specified specifications according to the requirements of the testing equipment when testing materials. Therefore, the materials need to be customized according to the equipment requirements, which makes the tensile testing operation of cement-based composite materials more complicated. In addition, the current tensile testing device is prone to damage on both sides of the material when fixing the material, affecting the overall tensile test results of the material. In view of this, there may be technical means to solve the above problems in the prior art, but this case intends to provide an alternative or replacement technical solution. Utility Model Content

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a cement-based composite material tensile test device, including a test box, a pull-out test structure is provided in the test box, and a protective observation structure is movably hinged at the upper end of the test box;

[0005] The pulling test structure includes: two fixed limit rods, two mobile platforms, two operating frames, two screw rods, four guide rods, four clamping plates, a driving assembly and four buffer assemblies;

[0006] The two fixed limit rods are respectively installed on both sides of the test box body, the two movable platforms are respectively movably mounted on the upper ends of the two fixed limit rods, the two operating frames are respectively installed on the upper ends of the two movable platforms, the two screw rods are respectively movably embedded in the centers of the two operating frames, the four guide rods are respectively movably embedded in both sides of the two operating frames, the four clamping plates are respectively installed on the upper ends of the two movable platforms and the lower ends of the four guide rods, the driving assembly is fixedly installed at the lower end of the test box body and connected to the lower ends of the two movable platforms, and the four buffer assemblies are respectively movably mounted on both sides of the two fixed limit rods.

[0007] Preferably, the protective observation structure comprises: a cover body, an observation window, a mounting frame and a camera;

[0008] The cover is installed on the upper end of the test box through hinges, the observation window is opened on the upper end of the cover, the mounting frame is fixedly installed on one side of the upper end of the cover, and the camera is fixedly installed on one side of the mounting frame.

[0009] Preferably, the driving assembly comprises: a fixing plate, two pressure sensors and two hydraulic cylinders;

[0010] The fixed plate is fixedly installed at the center of the lower end of the test box, the two pressure sensors are respectively installed on both sides of the fixed plate, the two hydraulic cylinders are respectively installed on one side of the two pressure sensors, and the telescopic ends are respectively connected to the lower ends of the two mobile platforms.

[0011] Preferably, the buffer component is a buffer spring, and the buffer spring is movably sleeved on one end of the fixed limiting rod.

[0012] Preferably, a connecting piece is provided at the connection between the hydraulic cylinder and the mobile platform.

[0013] Preferably, the connecting piece is in an "L" shape.

[0014] Beneficial Effects

[0015] The utility model provides a tensile testing device for cement-based composite materials, which has the following beneficial effects: the pulling test structure adopted in this case adopts multiple clamping plates to fix the material, and the position and clamping force of the clamping plates can be fully adjusted according to different material specifications, which can effectively increase the tensile test range of the cement-based composite materials, and increase the overall specifications of the clamping plates, which can effectively increase the contact area between the clamping plates and the cement-based composite materials, thereby ensuring the overall fixing effect of the cement-based composite materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main stereoscopic structure of a cement-based composite material tensile testing device described in the utility model.

[0017] Figure 2 It is a schematic diagram of the unfolded three-dimensional structure of a cement-based composite material tensile testing device described in the utility model.

[0018] Figure 3 It is a schematic diagram of the front and cross-sectional structure of a cement-based composite material tensile testing device described in the utility model.

[0019] In the figure: 1. test box, 2. fixed limit rod, 3. mobile platform, 4. operating frame, 5. screw, 6. guide rod, 7. clamping piece, 8. cover, 9. observation window, 10. mounting frame, 11. camera, 12. fixing plate, 13. pressure sensor, 14. hydraulic cylinder, 15. buffer spring, 16. connecting piece. DETAILED DESCRIPTION

[0020] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0021] Example: See Figure 1-3 A cement-based composite material tensile test device comprises a test box 1, a tensile test structure is arranged in the test box 1, and a protective observation structure is movably hinged at the upper end of the test box 1;

[0022] The pulling test structure includes: two fixed limit rods 2, two moving platforms 3, two operating frames 4, two screw rods 5, four guide rods 6, four clamping plates 7, a driving assembly and four buffer assemblies;

[0023] Two fixed limit rods 2 are respectively installed on both sides of the test box 1, two mobile platforms 3 are respectively movably mounted on the upper ends of the two fixed limit rods 2, two operating frames 4 are respectively installed on the upper ends of the two mobile platforms 3, two screws 5 are respectively movably embedded in the centers of the two operating frames 4, four guide rods 6 are respectively movably embedded in both sides of the two operating frames 4, four clamping plates 7 are respectively installed on the upper ends of the two mobile platforms 3 and the lower ends of the four guide rods 6, the driving assembly is fixedly installed at the lower end of the test box 1 and is connected to the lower ends of the two mobile platforms 3, and the four buffer assemblies are respectively movably mounted on both sides of the two fixed limit rods 2.

[0024] When in use, the staff first opens the protective observation structure, and then adjusts the two mobile platforms 3 to the specified position on the upper end of the fixed limit rod 2 through the driving component according to the specifications of the cement-based composite material, and then puts the two ends of the cement-based composite material between the four clamping pieces 7 respectively, and pushes the two clamping pieces 7 on the upper end to move downward by twisting the screw 5 in the operating frame 4, and cooperates with the two clamping pieces 7 on the upper ends of the two mobile platforms 3 to fix the two ends of the cement-based composite material. The overall movement stability of the clamping pieces 7 is ensured by the set guide rod 6, and then the protective observation component is reset, and the two mobile platforms 3 are driven by the driving component to move outward to pull the cement-based composite material. The driving component continues to work until the cement-based composite material breaks, and the maximum value of the pressure sensor 13 in the driving component is read to obtain the overall tensile strength data of the cement-based composite material. The buffer component can be used to buffer the two sides of the mobile platform 3.

[0025] In the specific implementation process, the protective observation structure includes: a cover body 8, an observation window 9, a mounting frame 10 and a camera 11;

[0026] The cover 8 is installed on the upper end of the test box 1 through hinges, the observation window 9 is opened on the upper end of the cover 8, the mounting frame 10 is fixedly installed on one side of the upper end of the cover 8, and the camera 11 is fixedly installed on one side of the mounting frame 10.

[0027] During the test, the cover 8 is provided to protect the upper end of the test box 1 to prevent splashing of debris when the cement-based composite material breaks. The observation window 9 cooperates with the camera 11 at the upper end of the mounting frame 10 to ensure the overall pull-out test observation effect of the cement-based composite material.

[0028] In the specific implementation process, the driving assembly includes: a fixed plate 12, two pressure sensors 13 and two hydraulic cylinders 14;

[0029] The fixed plate 12 is fixedly installed at the lower center of the test box 1, two pressure sensors 13 are respectively installed on both sides of the fixed plate 12, two hydraulic cylinders 14 are respectively installed on one side of the two pressure sensors 13, and the telescopic ends are respectively connected to the lower ends of the two mobile platforms 3.

[0030] During the test, the pressure sensors 13 disposed on both sides of the fixing plate 12 are used to detect the overall stress conditions of the two hydraulic cylinders 14, and the two hydraulic cylinders 14 are used to work synchronously to perform a pull-out test on the cement-based composite material.

[0031] In the specific implementation process, the buffer component is a buffer spring 15, and the buffer spring 15 is movably sleeved on one end of the fixed limiting rod 2.

[0032] In the specific implementation process, a connecting piece 16 is provided at the connection between the hydraulic cylinder 14 and the mobile platform 3 .

[0033] In a specific implementation process, the shape of the connecting piece 16 is "L"-shaped.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cement-based composite material tensile test device, comprising a test box (1), characterized in that: The test box (1) is provided with a pulling test structure, and the upper end of the test box (1) is movably hinged with a protective observation structure; The pulling test structure comprises: two fixed limit rods (2), two movable platforms (3), two operating frames (4), two screw rods (5), four guide rods (6), four clamping plates (7), a driving assembly and four buffer assemblies; The two fixed limit rods (2) are respectively installed on both sides of the test box (1); the two mobile platforms (3) are respectively movably mounted on the upper ends of the two fixed limit rods (2); the two operating frames (4) are respectively installed on the upper ends of the two mobile platforms (3); the two screw rods (5) are respectively movably embedded in the centers of the two operating frames (4); the four guide rods (6) are respectively movably embedded in both sides of the two operating frames (4); the four clamping plates (7) are respectively installed on the upper ends of the two mobile platforms (3) and the lower ends of the four guide rods (6); the driving assembly is fixedly installed at the lower end of the test box (1) and connected to the lower ends of the two mobile platforms (3); and the four buffer assemblies are respectively movably mounted on both sides of the two fixed limit rods (2).

2. A cement-based composite material tensile testing device according to claim 1, characterized in that: The protective observation structure comprises: a cover body (8), an observation window (9), a mounting frame (10) and a camera (11); The cover body (8) is mounted on the upper end of the test box (1) via hinges, the observation window (9) is opened on the upper end of the cover body (8), the mounting frame (10) is fixedly mounted on one side of the upper end of the cover body (8), and the camera (11) is fixedly mounted on one side of the mounting frame (10).

3. A cement-based composite material tensile testing device according to claim 1, characterized in that: The driving assembly comprises: a fixed plate (12), two pressure sensors (13) and two hydraulic cylinders (14); The fixed plate (12) is fixedly installed at the center of the lower end of the test box (1), the two pressure sensors (13) are respectively installed on both sides of the fixed plate (12), the two hydraulic cylinders (14) are respectively installed on one side of the two pressure sensors (13), and the telescopic ends are respectively connected to the lower ends of the two mobile platforms (3).

4. A cement-based composite material tensile testing device according to claim 1, characterized in that: The buffer component is a buffer spring (15), and the buffer spring (15) is movably sleeved on one end of the fixed limiting rod (2).

5. A cement-based composite material tensile testing device according to claim 3, characterized in that: A connecting piece (16) is provided at the connection between the hydraulic cylinder (14) and the mobile platform (3).

6. A cement-based composite material tensile testing device according to claim 5, characterized in that: The connecting piece (16) is in an "L" shape.

Images