Commercial concrete anti-cracking performance testing device

Abstract

The utility model relates to the technical field of concrete, in particular to a commercial concrete anti-cracking performance testing device which comprises a working table, an L-shaped connecting plate is arranged at the bottom of the working table, a servo motor is installed on the connecting plate, a clamping mechanism with a self-locking function is arranged in the working table, and the clamping mechanism is connected with the working table. The servo motor is provided with a clamping plate through a clamping mechanism, a placing plate is arranged at the top of the workbench, a liftable transparent protective cover is arranged at the top of the workbench, and a detection motor plate is arranged at the top of the inner wall of the transparent protective cover. According to the utility model, the gear I, the gear II, the worm, the worm gear, the gear III and the rack are matched, and due to the self-locking characteristics of the worm and the worm gear, a concrete test piece can be effectively prevented from displacing or loosening under the action of external force in the test process, so that the accuracy of test data is ensured, and the reliability of crack resistance evaluation of commercial concrete is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete technical field especially relates to a commodity concrete anti -cracking performance testing device. BACKGROUND

[0002] Commodity concrete (also called ready-mixed concrete) is an industrialized concrete that is prepared in advance by a professional concrete mixing station according to a unified formula, transported to a construction site by a mixer truck and directly used, its components include cement, aggregate (sand and stone), water and admixtures (such as water reducing agent, fly ash, etc.), has the characteristics of stable quality, environmental protection and high efficiency (reducing on-site dust and waste), controllable strength (such as C20-C60 grade), etc., is widely used in building, bridge, road and other engineering, and replaces the traditional on-site mixing mode.

[0003] The existing concrete anti-cracking performance testing device, such as the commodity concrete anti-cracking performance testing device disclosed in the authorized announcement CN220794857U, adopts a bidirectional motor to drive a transmission rod to rotate and in turn drive the clamping assemblies to move close to each other to clamp and fix the concrete of different thicknesses, but no self-locking structure is arranged in the clamping assemblies, and in the test process, the concrete test piece may be displaced or loosened under the action of external force, resulting in inaccurate test data and affecting the reliability of the anti-cracking performance evaluation. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings that no self-locking structure is arranged in the existing clamping assemblies, the concrete test piece may be displaced or loosened under the action of external force in the test process, resulting in inaccurate test data and affecting the reliability of the anti-cracking performance evaluation, and provides a commodity concrete anti-cracking performance testing device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A commodity concrete anti-cracking performance testing device, comprising a workbench, an L-shaped connecting plate is arranged at the bottom of the workbench, a servo motor is installed on the connecting plate, a clamping mechanism with a self-locking function is arranged in the workbench, the servo motor is provided with a clamping plate through the clamping mechanism, a placing plate is arranged at the top of the workbench, a transparent protective cover that can be lifted is arranged at the top of the workbench, and a detection motor plate is arranged at the top of the inner wall of the transparent protective cover.

[0007] Preferably, the clamping mechanism comprises a gear one, a gear two, a worm, a worm wheel, a gear three and a rack, the gear one is fixedly arranged on the output end of the servo motor, the gear two is fixedly arranged at one end of the worm, the worm is rotatably arranged in the workbench, the worm wheel is rotatably arranged at the center of the workbench, the gear three is coaxially arranged with the worm wheel, and the rack is arranged on both sides of the gear three.

[0008] Preferably, the rack is provided with a pair of rack and fixedly connected with the bottom of the clamping plate.

[0009] Preferably, a rectangular slide rod is fixedly arranged inside the workbench, and the rack passes through the slide rod and is slidingly fitted.

[0010] Preferably, a sliding opening is formed in the top of the workbench, and the clamping plate is slidingly fitted with the sliding opening.

[0011] Preferably, a protective shell is arranged below the detection motor plate, a push rod motor is arranged in the protective shell, and the telescopic end of the push rod motor is fixedly connected with the bottom of the detection motor plate.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] In use, the utility model discloses a gear one, a gear two, a worm, a worm wheel, a gear three and a rack are cooperated, due to the self-locking characteristic of the worm and the worm wheel, displacement or loosening of the concrete test piece under the action of external force in the test process can be effectively prevented, thereby guaranteeing the accuracy of test data and improving the reliability of the commercial concrete crack resistance evaluation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A three-dimensional structure schematic view of a commercial concrete crack resistance test device is provided for the utility model;

[0015] Figure 2 A sectional view of a commercial concrete crack resistance test device is provided for the utility model; Figure One

[0016] Figure 3 A sectional view of a commercial concrete crack resistance test device is provided for the utility model; Figure Two

[0017] Figure 4 An internal three-dimensional structure schematic view of a commercial concrete crack resistance test device is provided for the utility model.

[0018] In the drawing: 1, workbench; 2, connecting plate; 3, servo motor; 4, clamping mechanism; 5, clamping plate; 6, placing plate; 7, transparent protective cover; 8, detection motor plate; 9, gear one; 10, gear two; 11, worm; 12, worm wheel; 13, gear three; 14, rack; 15, slide rod; 16, sliding opening; 17, protective shell; 18, push rod motor. DETAILED DESCRIPTION

[0019] ​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. Figures 1-4 A commercial concrete anti-cracking performance test device, comprising a workbench 1, the bottom of the workbench 1 is provided with an L-shaped connecting plate 2, a servo motor 3 is installed on the connecting plate 2, a clamping mechanism 4 with self-locking function is arranged in the workbench 1, the clamping mechanism 4 comprises a gear one 9, a gear two 10, a worm 11, a worm wheel 12, a gear three 13 and a rack 14, the gear one 9 is fixedly arranged on the output end of the servo motor 3, the gear two 10 is fixedly arranged on one end of the worm 11, the worm 11 is rotatably arranged in the workbench 1, the worm wheel 12 is rotatably arranged in the center of the workbench 1, the gear three 13 is coaxially arranged with the worm wheel 12, and the rack 14 is arranged on both sides of the gear three 13.

[0021] The servo motor 3 is provided with a clamping plate 5 through the clamping mechanism 4, the top of the workbench 1 is provided with a placing plate 6, the top of the workbench 1 is provided with a transparent protective cover 7 which can be lifted, and the inner wall top of the transparent protective cover 7 is provided with a detection motor plate 8.

[0022] It should be noted that the servo motor 3, the transparent protective cover 7, the detection motor plate 8 and the push rod motor 18 are prior art in the field to which the present technology belongs, and the specific type and size need to be selected and determined according to the actual size and the like of the device, the specific selection and calculation method adopts the prior art in the field, and thus will not be described herein, and all of them can be powered by external equipment and controlled to be turned on and off.

[0023] The transparent protective cover 7 cooperates with the lifting structure, and when the test device is tested, the transparent protective cover 7 can be lowered to prevent broken concrete from splashing and injuring the human body.

[0024] The detection motor plate 8 moves downward to contact the top of the concrete, and the anti-cracking performance of the commercial concrete is detected, and thus will not be described herein.

[0025] Further, the rack 14 is provided in pairs, and the rack 14 is fixedly connected to the bottom of the clamping plate 5.

[0026] The clamping plate 5 is connected to the clamping mechanism 4 through the rack 14, and can slide in the sliding port 16 on the top of the workbench 1 under the drive of the servo motor 3.

[0027] Further, a rectangular slide rod 15 is fixedly arranged in the workbench 1, and the rack 14 passes through the slide rod 15 and is slidingly matched. Further, a rectangular slide rod 15 is fixedly arranged in the workbench 1, and the rack 14 passes through the slide rod 15 and is slidingly matched.

[0028] The rectangular slide rod 15 fixed inside the workbench 1 is in sliding fit with the rack 14, providing stable guidance for the movement of the rack 14. The rectangular design of the slide rod 15 increases the contact area with the rack 14, improving the stability and reliability of sliding and reducing the impact on clamping accuracy caused by shaking during sliding.

[0029] Further, the workbench 1 is provided with a slide opening 16 at the top, and the clamping plate 5 is in sliding fit with the slide opening 16.

[0030] The clamping plate 5 is made of wear-resistant material (such as polytetrafluoroethylene coating), which is in precise fit with the slide opening 16, reduces the movement resistance, and prolongs the service life. The width of the slide opening 16 is slightly larger than the thickness of the clamping plate 5, allowing for slight deflection to adapt to the uneven surface of the test piece.

[0031] Further, the detection motor plate 8 is provided with a protective shell 17 below, and the protective shell 17 is provided with a push rod motor 18. The extension end of the push rod motor 18 is fixedly connected with the bottom of the detection motor plate 8.

[0032] The detection motor plate 8 is arranged on the inner wall top of the transparent protective cover 7, providing an installation platform for the detection equipment. The push rod motor 18 is arranged in the protective shell 17 below the detection motor plate 8, and the extension end of the push rod motor 18 is fixedly connected with the bottom of the detection motor plate 8.

[0033] By controlling the extension of the push rod motor 18, the height of the detection motor plate 8 can be flexibly adjusted, so that the detection equipment can more accurately detect the test piece.

[0034] The protective shell 17 can protect the push rod motor 18 and the detection equipment, preventing dust, debris and other substances from damaging the equipment during the test, and prolonging the service life of the equipment.

[0035] Working principle:

[0036] First, the commodity concrete test piece to be tested is placed steadily on the placing plate 6 on the top of the workbench 1. The external device is started to supply power to the servo motor 3 and control it to start, and the servo motor 3 starts to operate, and its output end drives the fixed gear one 9 to rotate, the gear one 9 meshes with the gear two 10, and the gear two 10 drives the worm 11 to rotate in the workbench 1, the worm 11 cooperates with the worm gear 12, and since the worm gear 12 is arranged at the center of the workbench 1 and rotates, it drives the coaxial gear three 13 to rotate, the gear strips 14 on both sides of the gear three 13 mesh with the gear three 13, and under the guidance of the rectangular slide rod 15, the gear strips 14 move linearly stably, and further drive the clamping plate 5 fixedly connected with the bottom of the gear strips 14 to slide in the sliding port 16 on the top of the workbench 1, until the clamping plate 5 tightly clamps the concrete test piece, and the self-locking characteristics of the worm 11 and the worm gear 12 are used to ensure that the test piece will not be displaced or loosened due to external force during the test.

[0037] Then, the transparent protective cover 7 is controlled to be lowered to cover the test piece completely to prevent the broken concrete from splashing and injuring people during the test. Then, the push rod motor 18 in the protective shell 17 is controlled to extend and retract, so that the detection motor plate 8 moves downward until it contacts the top of the concrete test piece, and the crack resistance of the commodity concrete is detected. During the detection, the operator can observe the state of the test piece through the transparent protective cover 7.

[0038] After the detection is completed, the push rod motor 18 is controlled to make the detection motor plate 8 rise and reset, and then the transparent protective cover 7 is raised. Then the servo motor 3 is controlled to reverse, so that the clamping plate 5 loosens the test piece, and finally the test piece is taken out, and one test is completed.

[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A device for testing the crack resistance of commercial concrete, comprising a worktable (1), characterized in that, The bottom of the workbench (1) is provided with an L-shaped connecting plate (2), a servo motor (3) is installed on the connecting plate (2), a clamping mechanism (4) with self-locking function is arranged in the workbench (1), the servo motor (3) is provided with a clamping plate (5) through the clamping mechanism (4), a placing plate (6) is arranged on the top of the workbench (1), a liftable transparent protective cover (7) is arranged on the top of the workbench (1), and a detection motor plate (8) is arranged on the inner wall top of the transparent protective cover (7).

2. The device for testing the anti-cracking performance of commercial concrete according to claim 1, wherein, The clamping mechanism (4) comprises a gear one (9), a gear two (10), a worm (11), a worm wheel (12), a gear three (13) and a rack (14), the gear one (9) is fixedly arranged on the output end of the servo motor (3), the gear two (10) is fixedly arranged on one end of the worm (11), the worm (11) is rotatably arranged in the workbench (1), the worm wheel (12) is rotatably arranged in the center of the workbench (1), the gear three (13) is coaxially arranged with the worm wheel (12), and the rack (14) is arranged on both sides of the gear three (13).

3. The device for testing the anti-cracking performance of commercial concrete according to claim 2, wherein, The rack (14) is provided with a pair of rack (14) and the bottom of the clamping plate (5) is fixedly connected.

4. The device for testing the anti-cracking performance of commercial concrete according to claim 2, characterized in that, The workbench (1) is internally and fixedly provided with a rectangular slide rod (15), and the rack (14) passes through the slide rod (15) and is in sliding fit.

5. The device for testing the anti-cracking performance of commercial concrete according to claim 1, wherein The top of the workbench (1) is provided with a sliding port (16), and the clamping plate (5) is in sliding fit with the sliding port (16).

6. The device for testing the anti-cracking performance of commercial concrete according to claim 1, wherein The detection motor plate (8) is provided with a protection shell (17) below, the protection shell (17) is provided with a push rod motor (18), and the telescopic end of the push rod motor (18) is fixedly connected with the bottom of the detection motor plate (8).

Images