Splitting tensile strength testing device

Abstract

The utility model provides a splitting tensile strength testing device. The splitting tensile strength testing device comprises a support frame body, a transmission case, a loading base, a guide rod, a load sensor, a movable cross beam, a cross beam, an infrared gradienter, a clamp device and a controller, the loading base, the guide rod, the load sensor and the infrared gradienter are positioned on the same axis; and the clamp device is arranged between the loading base and the guide rod. The utility model provides a splitting tensile strength testing device which is suitable for concrete test detection, and an infrared gradienter reduces the eccentric problem of a concrete test block in the mounting and testing processes to the greatest extent; through the assistance of the movable support, the test piece can be quickly and stably mounted and placed on the filler strip, and the test precision and the test efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete testing equipment, specifically to a splitting tensile strength testing device. Background Technology

[0002] The mechanical properties of concrete are crucial. During the design and construction of concrete structures, their tensile properties need to be tested and evaluated to ensure safe and reliable concrete performance. There are two methods for testing the tensile strength of concrete: the axial tensile method and the splitting tensile method. The splitting tensile method determines the maximum failure load by testing the splitting tensile strength of concrete and then calculates the splitting tensile strength of the concrete specimen. The splitting tensile strength of concrete is an important indicator of its mechanical properties. In relevant concrete splitting tensile strength tests, concrete cube specimens are typically used. The concrete splitting tensile strength test method generally involves: first, removing the concrete specimen from the curing chamber after reaching the specified test age; before the test, marking the splitting surface with a straight line drawn on the center of the top and bottom surfaces of the specimen; then placing the specimen, spacer block, and spacer strip on a bearing plate and geometrically aligning them so that the splitting surface is perpendicular to the direction of compression; subsequently conducting the test until the specimen fails, obtaining the failure load, and calculating the splitting tensile strength. The following problems were encountered during the experiment: it was difficult for the testers to fix the concrete specimens, which resulted in a long installation time; it was also difficult to align the concrete specimens with the pressure direction of the testing machine, which affected the accuracy of the experiment. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a splitting tensile strength testing device, which solves the problems of cumbersome concrete specimen installation process, high installation and alignment difficulty, and low testing accuracy in existing concrete splitting tensile strength tests.

[0004] The technical solution adopted in this utility model is as follows:

[0005] This utility model provides a splitting tensile strength testing device, including a support frame, a transmission box (1), a loading base (2), a guide rod (3), a load sensor (4), a moving crossbeam (5), a crossbeam (6), an infrared level (7), a clamping device (8), and a controller (9);

[0006] The upper part of the support frame is provided with the crossbeam (6), and the crossbeam (6) is equipped with the infrared level (7) with the infrared emission direction vertically downward; the lower part of the crossbeam (6) is provided with the horizontally movable crossbeam (5) that can be vertically raised and lowered along the support frame, and the bottom surface of the movable crossbeam (5) is connected to the load sensor (4); the bottom of the load sensor (4) is connected to the guide rod (3); the lower part of the support frame is provided with the transmission box (1); the upper part of the transmission box (1) is provided with the loading base (2);

[0007] Wherein: the loading base (2), the guide rod (3), the load sensor (4) and the infrared level (7) are located on the same axis; the clamping device (8) is set between the loading base (2) and the guide rod (3);

[0008] The load sensor (4) and the moving crossbeam (5) are connected to the controller (9).

[0009] Preferably, the clamping device (8) includes a first pad (801), a movable support (802), a second pad (804), a first pad (805), and a second pad (806);

[0010] The first pad (801) is placed on the top surface of the loading base (2); the second pad (806) is placed on the top surface of the first pad (801); the movable support (802) is provided on each side of the loading base (2), the top surface of the movable support (802) is parallel to the movable crossbeam (5) and at the same height as the second pad (806); the specimen (803) is placed on the second pad (806) and supported by the movable supports (802) on both sides; the first pad (805) parallel to the second pad (806) is placed on the top surface of the specimen (803);

[0011] The bottom of the guide rod (3) is provided with the second pad (804), which is coaxially arranged with the first pad (801) in relation to each other; the second pad (804) presses on the upper part of the first pad (805).

[0012] Preferably, the height of the movable support (802) is adjustable.

[0013] Preferably, the bearing surface of the movable support (802) is made of steel and has a flat surface.

[0014] Preferably, the test piece (803), the first pad (801), the second pad (804), the first pad (805), and the second pad (806) are aligned on the same axis.

[0015] Preferably, the infrared light emitted by the infrared level (7) is vertically centered on the support frame and covers the entire length of the support frame.

[0016] The splitting tensile strength testing device provided by this utility model has the following advantages:

[0017] This invention provides a splitting tensile strength testing device suitable for concrete testing. The infrared level minimizes the eccentricity problem of concrete specimens during installation and testing. With the assistance of a movable support, the specimen can be quickly and stably installed on the pad, improving testing accuracy and efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a splitting tensile strength testing device provided by this utility model;

[0019] Figure 2 A schematic diagram of the clamping device provided by this utility model.

[0020] In the figure: 1—Transmission box; 2—Loading base; 3—Guide rod; 4—Load sensor; 5—Moving crossbeam; 6—Crossbeam; 7—Infrared level; 8—Clamping device; 9—Controller; 10—Computer; 801—First pad; 802—Movable support; 803—Specimen; 804—Second pad; 805—First pad strip; 806—Second pad strip. Detailed Implementation

[0021] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] See Figure 1 This utility model provides a splitting tensile strength testing device, including a support frame, a transmission box 1, a loading base 2, a guide rod 3, a load sensor 4, a moving crossbeam 5, a crossbeam 6, an infrared level 7, a clamping device 8, and a controller 9.

[0023] A crossbeam 6 is installed on the upper part of the support frame, and an infrared level 7 with an infrared emission direction pointing vertically downward is installed on the crossbeam 6; the infrared rays emitted by the infrared level 7 are vertically centered on the support frame and cover the entire length of the support frame.

[0024] Below the crossbeam 6, a horizontally movable crossbeam 5 that can be vertically raised and lowered along the support frame is provided. The bottom surface of the movable crossbeam 5 is connected to a load sensor 4. The bottom of the load sensor 4 is connected to a guide rod 3. A transmission box 1 is provided at the lower part of the support frame. A loading base 2 is provided on the transmission box 1.

[0025] Among them: the loading base 2, guide rod 3, load sensor 4 and infrared level 7 are located on the same axis; a clamping device 8 is set between the loading base 2 and the guide rod 3;

[0026] The load sensor 4 and the moving crossbeam 5 are connected to the controller 9. The controller 9 controls the stable up-and-down movement of the moving crossbeam 5.

[0027] See Figure 2 The clamping device 8 includes a first pad 801, a movable support 802, a second pad 804, a first pad strip 805, and a second pad strip 806;

[0028] A first pad 801 is placed on the top surface of the loading base 2; a second pad 806 is placed on the top surface of the first pad 801; movable supports 802 are provided on both sides of the loading base 2, the top surface of the movable supports 802 is parallel to the movable crossbeam 5 and at the same height as the second pad 806; the specimen 803 is placed on top of the second pad 806 and supported by the movable supports 802 on both sides; a first pad 805 parallel to the second pad 806 is placed on the top surface of the specimen 803.

[0029] A second pad 804 is provided at the bottom of the guide rod 3. The second pad 804 and the first pad 801 are arranged coaxially and vertically opposite each other. The second pad 804 presses on the upper part of the first pad 805. The specimen 803, the first pad 801, the second pad 804, the first pad 805 and the second pad 806 are aligned on the same axis.

[0030] In this invention, the height of the movable support 802 is adjustable. Its bearing surface is made of steel and has a flat surface. It assists the second pad 806 in supporting the specimen 803, facilitating the installation of the specimen 803 and enabling the specimen to be quickly and stably placed on the second pad 806. This invention does not limit the specific structural form of the height adjustment of the movable support 802. For example, it can be a liftable structure with a sleeve at the bottom and a screw at the top, or it can be a structure that achieves stable vertical lifting controlled by a controller 9. Furthermore, it may include a computer 10, which, or the controller 9, enables stable movement of the movable support 802. The movement distance of the movable support 802 can be set so that the movable support 802 and the second pad 806 are at the same height and parallel.

[0031] In this invention, the infrared light emitted by the infrared level 7 is vertically centered on the support frame and covers the entire length of the support frame, making it easy to manually align the test piece 803, the first pad 801, the second pad 804, the first pad 805, and the second pad 806 on the same axis.

[0032] The application method of the splitting tensile strength testing device provided by this utility model is implemented according to the following steps:

[0033] Step 1: After specimen 803 reaches the required age, specimen 803 is removed.

[0034] Step 2: Before the test, wipe the surface of the specimen 803 and the surfaces of the loading base 2, the first pad 801, and the second pad 804 clean, and draw straight lines in the middle of the top and bottom surfaces of the specimen 803.

[0035] Step 3: Turn on the infrared level 7 on the crossbeam 6, place the first pad 801 on the loading base 2 and center it, place the second pad 806 on the first pad 801 and center it, and move the movable support 802 through the controller 9 or computer 10 so that it is at the same height plane and parallel to the second pad 806.

[0036] Step 4: Install specimen 803. Place specimen 803 on a surface parallel to the movable support 802 and the second pad 806, and align it using the infrared level 7 so that the straight line on specimen 803 is aligned with the infrared rays emitted by the infrared level 7. Move the moving beam 5 downwards using the controller 9 or computer 10 to fix specimen 803 in place, and then move the movable support 802 downwards to disengage from specimen 803.

[0037] Step 5: Begin the test, applying continuous and uniform loading until specimen 803 fails. The failure load is measured by load sensor 4 and transmitted to computer 10. Computer 10 records the failure load and calculates the splitting tensile strength of the concrete.

[0038] The splitting tensile strength testing device provided by this utility model has the following advantages:

[0039] This invention provides a splitting tensile strength testing device suitable for concrete testing. The infrared level minimizes the eccentricity problem of concrete specimens during installation and testing. With the assistance of a movable support, the specimen can be quickly and stably installed on the pad, improving testing accuracy and efficiency.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cleavage tensile strength testing device characterized by, It includes a support frame, a transmission box (1), a loading base (2), a guide rod (3), a load sensor (4), a moving crossbeam (5), a crossbeam (6), an infrared level (7), a clamping device (8), and a controller (9); The upper part of the support frame is provided with the crossbeam (6), and the crossbeam (6) is equipped with the infrared level (7) with the infrared emission direction vertically downward; the lower part of the crossbeam (6) is provided with the horizontally movable crossbeam (5) that can be vertically raised and lowered along the support frame, and the bottom surface of the movable crossbeam (5) is connected to the load sensor (4); the bottom of the load sensor (4) is connected to the guide rod (3); the lower part of the support frame is provided with the transmission box (1); the upper part of the transmission box (1) is provided with the loading base (2); Wherein: the loading base (2), the guide rod (3), the load sensor (4) and the infrared level (7) are located on the same axis; the clamping device (8) is set between the loading base (2) and the guide rod (3); The load sensor (4) and the moving crossbeam (5) are connected to the controller (9).

2. A device for testing the splitting tensile strength according to claim 1, characterized in that The clamping device (8) includes a first pad (801), a movable support (802), a second pad (804), a first pad (805), and a second pad (806); The first pad (801) is placed on the top surface of the loading base (2); the second pad (806) is placed on the top surface of the first pad (801); the movable support (802) is provided on each side of the loading base (2), the top surface of the movable support (802) is parallel to the movable crossbeam (5) and at the same height as the second pad (806); the specimen (803) is placed on the second pad (806) and supported by the movable supports (802) on both sides; the first pad (805) parallel to the second pad (806) is placed on the top surface of the specimen (803); The bottom of the guide rod (3) is provided with the second pad (804), which is coaxially arranged with the first pad (801) in relation to each other; the second pad (804) presses against the upper part of the first pad (805).

3. A device for testing the splitting tensile strength according to claim 2, characterized in that The height of the movable support (802) is adjustable.

4. A device for testing the splitting tensile strength according to claim 2, characterized in that The bearing surface of the movable support (802) is made of steel and has a flat surface.

5. A device for testing the splitting tensile strength according to claim 2, characterized in that The specimen (803), the first pad (801), the second pad (804), the first pad (805), and the second pad (806) are aligned on the same axis.

6. A device for testing the splitting tensile strength according to claim 1, characterized in that The infrared light emitted by the infrared level (7) is vertically centered on the support frame and covers the entire length of the support frame.

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