Concrete crack resistance testing device

Abstract

The utility model belongs to the technical field of concrete crack resistance testing, and particularly relates to a concrete crack resistance testing device. Comprising a testing box body, a pressurizing mechanism arranged at the top of the testing box body, a supporting table arranged at the bottom of the testing box body, a surrounding plate movably connected to the outer side of the supporting table and a concrete cleaning assembly arranged on the rear side wall of the testing box body, a supporting frame is arranged on one side of the testing box body, and a lead screw is rotationally connected to the bottom of the supporting frame; a motor is arranged at the bottom end of the lead screw, a limiting rod is arranged on the other side of the testing box body, a sliding block in transmission threaded connection with the lead screw is arranged on one side of the surrounding plate, and a sliding sleeve in sliding connection with the limiting rod is arranged on the other side of the surrounding plate. According to the concrete crack resistance testing device, concrete blocks to be tested can be conveniently placed on the supporting table, the broken concrete blocks can be automatically swept down from the supporting table, and the broken concrete blocks can be prevented from splashing out in the testing process.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete anti-cracking performance testing, and in particular relates to a concrete anti-cracking performance testing device. Background Art

[0002] Concrete is a general term for engineering composite materials that are made by cementing aggregates into a whole. It refers to cement concrete that is made by mixing, molding and curing cement as a cementing material, sand and stone as aggregates, and water in a certain proportion. Testing the early crack resistance of concrete is one of the important processes during concrete production.

[0003] A Chinese patent with the authorization announcement number CN 217765875 U discloses a concrete crack resistance performance test device, comprising a box body, a pressurizing device is arranged on the top of the box body, a support plate is fixedly connected to the bottom end of the inner cavity of the box body, a heating device is arranged on the top of the support plate, symmetrical fixing plates are fixedly connected to both sides of the heating device, a control mechanism is arranged on the inner side of the fixing plate, a sealing plate is arranged on the upper end of the control mechanism, and a controller is arranged on the outer end of the box body; the concrete crack resistance performance test device can seal the top of the heating device during use to prevent the concrete from being broken and splashing when the pressurizing device pressurizes the concrete, thereby accidentally injuring the user; however, when using the above device for crack resistance test, it is inconvenient to put the concrete block into the placement block, and it is also inconvenient to take out the broken concrete block from the placement groove of the placement block after the test, and the operation is time-consuming and laborious. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a concrete crack resistance test device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a concrete crack resistance test device, comprising a test box, a pressure-applying mechanism arranged on the top of the test box, a support platform arranged at the bottom of the test box and used to place concrete blocks, a panel movably connected to the outside of the support platform, and a concrete cleaning assembly arranged on the rear wall of the test box, wherein a support frame is arranged on one side of the test box, a screw rod is rotatably connected to the bottom of the support frame, a motor is installed at the bottom end of the screw rod and inside the test box, a limit rod is arranged on the other side of the test box, a slider screwed to the screw rod for transmission is arranged on one side of the panel, and a sleeve slidably connected to the limit rod is arranged on the other side of the panel.

[0006] The beneficial effects of the present utility model are as follows: By providing an adjustable surrounding plate and a concrete cleaning assembly, this concrete anti-cracking performance test device not only facilitates the placement of the concrete block to be tested on the support platform and the automatic cleaning of the broken concrete block from the support platform, but also prevents the broken concrete block from splashing out during the test.

[0007] In order to facilitate the test of the anti-cracking performance of concrete at high temperatures:

[0008] As a further improvement of the above technical solution: The surrounding plate is rectangular, and a heating block is provided on the inner side of the surrounding plate, and a heat conduction plate that fits the support platform is provided on the inner side of the heating block.

[0009] The beneficial effect of this improvement is that by providing a heating block and a heat conduction plate on the inner side of the surrounding plate, the concrete block can be heated, thereby facilitating the test of the anti-cracking performance of concrete at high temperatures.

[0010] In order to automatically clean the broken concrete block from the support platform:

[0011] As a further improvement of the above technical solution: The concrete cleaning assembly includes an electric telescopic rod provided at the rear side of the support platform and connected to the inner side wall of the test box body, a scraping plate provided at the end of the electric telescopic rod, a notch opened at the bottom of the scraping plate and located on the side close to the electric telescopic rod, and a cleaning brush installed at the bottom of the notch.

[0012] The beneficial effect of this improvement is that after the concrete block test is completed, the electric telescopic rod is controlled to move through the control switch, so that it drives the scraping plate and the cleaning brush to move toward the side close to the support platform, causing the scraping plate and the cleaning brush to push the concrete block on the support platform down, saving the burden of manually cleaning the broken concrete block from the support platform.

[0013] In order to prevent the concrete block from falling off the support platform during cleaning:

[0014] As a further improvement of the above technical solution: The scraping plate is set in a U shape, and the two ends of the scraping plate just fit the two sides of the support platform.

[0015] The beneficial effect of this improvement is that when cleaning the concrete block, the two sides of the scraping plate are just located at the two ends of the support platform, which can block the concrete block on the support platform to prevent it from falling off.

[0016] In order to facilitate the inspection of the anti-cracking performance of concrete:

[0017] As a further improvement of the above technical solution: The pressurizing mechanism includes a hydraulic cylinder provided on the inner top wall of the test box body, a pressure sensor provided at the output end of the hydraulic cylinder, and a pressurizing block fixedly connected to the bottom of the pressure sensor.

[0018] The beneficial effects of this improvement are as follows: During the test, the hydraulic cylinder is controlled to move downward, driving the pressure sensor and the pressing block to move downward, applying an external force to the concrete block. The pressure sensor can detect the magnitude of the pressure, thus facilitating the inspection of the crack resistance performance of the concrete.

[0019] To prevent the concrete from splashing outside the test box:

[0020] As a further improvement of the above technical solution: An inverted U-shaped mounting frame is provided on the outside of the test box. A slide rail is provided on one side of the mounting frame, and a transparent protective door is slidably connected inside the slide rail.

[0021] The beneficial effects of this improvement are as follows: During the test, pulling up the transparent protective door can prevent the concrete from splashing outside the test box.

[0022] To centrally process the concrete blocks falling from the support platform:

[0023] As a further improvement of the above technical solution: A slot is provided inside the test box and below the mounting frame, and a receiving drawer is slidably connected inside the slot.

[0024] The beneficial effects of this improvement are as follows: When cleaning the concrete blocks, pulling out the receiving drawer can collect the concrete blocks falling from the support platform, facilitating their centralized processing. Description of the Drawings

[0025] Figure 1 It is a front view structural schematic diagram of the present utility model;

[0026] Figure 2 It is a right view sectional structural schematic diagram of the present utility model;

[0027] Figure 3 It is a front view structural schematic diagram of the present utility model with the transparent protective door removed;

[0028] Figure 4 It is a front view sectional structural schematic diagram of the present utility model.

[0029] In the figure: 1. Test box; 2. Support platform; 3. Enclosure; 4. Support frame; 5. Lead screw; 6. Motor; 7. Limit rod; 8. Slide block; 9. Slide sleeve; 10. Heating block; 11. Heat conducting plate; 12. Electric telescopic rod; 13. Scraper; 14. Notch; 15. Cleaning brush; 16. Hydraulic cylinder; 17. Pressure sensor; 18. Pressing block; 19. Mounting frame; 20. Slide rail; 21. Transparent protective door; 22. Slot; 23. Receiving drawer. Detailed Embodiments

[0030] To enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present utility model.

[0031] Such as Figures 1-4As shown in the figure, a test device for the crack resistance performance of concrete includes a test box body 1, a pressurizing mechanism arranged on the top of the test box body 1, a support platform 2 arranged at the bottom of the test box body 1 and used for placing concrete blocks, a surrounding plate 3 movably connected to the outside of the support platform 2, and a concrete cleaning component arranged on the rear side wall of the test box body 1. A support frame 4 is arranged on one side of the test box body 1. A lead screw 5 is rotatably connected to the bottom of the support frame 4. A motor 6 is installed at the bottom end of the lead screw 5 and inside the test box body 1. A limiting rod 7 is arranged on the other side of the test box body 1. A slider 8 that is in transmission screw connection with the lead screw 5 is arranged on one side of the surrounding plate 3. A sliding sleeve 9 that is slidably connected to the limiting rod 7 is arranged on the other side of the surrounding plate 3. This test device for the crack resistance performance of concrete, by setting the adjustable surrounding plate 3 and the concrete cleaning component, not only facilitates placing the concrete blocks to be tested on the support platform 2 and automatically sweeping the broken concrete blocks off the support platform 2, but also can prevent the broken concrete blocks from splashing out during the test. The surrounding plate 3 is rectangular, and a heating block 10 is arranged on the inner side of the surrounding plate 3. A heat conducting plate 11 that fits the support platform 2 is arranged on the inner side of the heating block 10. By arranging the heating block 10 and the heat conducting plate 11 on the inner side of the surrounding plate 3, the concrete blocks can be heated, so as to facilitate testing the crack resistance performance of concrete at high temperatures. The concrete cleaning component includes an electric telescopic rod 12 arranged at the rear side of the support platform 2 and connected to the inner side wall of the test box body 1, a scraping plate 13 arranged at the tail end of the electric telescopic rod 12, a notch 14 opened at the bottom of the scraping plate 13 and close to one side of the electric telescopic rod 12, and a cleaning brush 15 installed at the bottom of the notch 14. After the concrete block test is completed, the electric telescopic rod 12 is controlled to move through the control switch, so that it drives the scraping plate 13 and the cleaning brush 15 to move towards the side close to the support platform 2, making the scraping plate 13 and the cleaning brush 15 push the concrete blocks on the support platform 2 down, saving the burden of manually cleaning the broken concrete blocks from the support platform 2. The scraping plate 13 is set in a U shape, and the two ends of the scraping plate 13 just fit the two sides of the support platform 2. When cleaning the concrete blocks, the two sides of the scraping plate 13 are just located at the two ends of the support platform 2, and can block the concrete blocks on the support platform 2 to prevent them from falling off. The pressurizing mechanism includes a hydraulic cylinder 16 arranged on the inner top wall of the test box body 1, a pressure sensor 17 arranged at the output end of the hydraulic cylinder 16, and a pressurizing block 18 fixedly connected to the bottom of the pressure sensor 17. During the test, the hydraulic cylinder 16 is controlled to move downward, so that it drives the pressure sensor 17 and the pressurizing block 18 to move downward to apply an external force to the concrete blocks. The pressure sensor 17 can detect the magnitude of the pressure, so as to facilitate testing the crack resistance performance of the concrete. An inverted U-shaped installation frame 19 is arranged on the outside of the test box body 1. A slide rail 20 is arranged on one side of the installation frame 19. A transparent protective door 21 is slidably connected inside the slide rail 20. During the test, the transparent protective door 21 is pulled up.It can prevent concrete from splashing outside the test box body 1. A slot 22 is provided inside the test box body 1 and below the installation frame 19. A receiving drawer 23 is slidably connected inside the slot 22. When cleaning the concrete blocks, the receiving drawer 23 is pulled out, and the concrete blocks falling from the support table 2 can be collected for centralized treatment.

[0032] The working principle and usage process of the present utility model: When using this device, the transparent protective door 21 is pulled outwards along the slide rail 20, and the concrete block to be detected is placed on the support table 2, directly below the pressing block 18. The motor 6 is controlled to rotate in the reverse direction through the control switch, driving the lead screw 5 to rotate counterclockwise, driving the slider 8 to move upwards along the lead screw 5, and at the same time driving the sliding sleeve 9 to slide upwards along the limiting rod 7, so that the enclosure 3 is located at the top of the support table 2, and its bottom end is exactly located at the top end of the support table 2. When conducting the test, the transparent protective door 21 is closed, which can prevent concrete from splashing outside the test box body 1. The hydraulic cylinder 16 is controlled to move downwards, driving the pressure sensor 17 and the pressing block 18 to move downwards to apply an external force to the concrete block. The pressure sensor 17 can detect the magnitude of the pressure, thereby facilitating the inspection of the crack resistance performance of the concrete. After the concrete crack resistance performance test is completed, the motor 6 is controlled to rotate in the forward direction through the control switch, driving the lead screw 5 to rotate clockwise, driving the slider 8 to move downwards along the lead screw 5, and at the same time driving the sliding sleeve 9 to slide downwards along the limiting rod 7, so that the top end of the enclosure 3 moves down to be flush with the top wall of the support table 2. The receiving drawer 23 is pulled out, and at the same time, the electric telescopic rod 12 is controlled to move through the control switch, driving the scraper 13 and the cleaning brush 15 to move towards the side close to the support table 2, so that the scraper 13 and the cleaning brush 15 push the concrete blocks on the support table 2 down and into the receiving drawer 23, eliminating the burden of manually cleaning the broken concrete blocks from the support table 2.

[0033] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0034] In this text, specific examples are used to elaborate on the principle and implementation mode of the present utility model. The description of the above examples is only for helping to understand the method and its core idea of the present utility model. The above is only the preferred implementation mode of the present utility model. It should be noted that due to the limitation of literal expression, objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements, refinements or changes can also be made, or the above technical features can be combined in an appropriate way; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present utility model.

Claims

1. A concrete crack resistance test device, comprising a test box (1), a pressure mechanism arranged on the top of the test box (1), a support platform (2) arranged on the bottom of the test box (1) and used to place concrete blocks, a panel (3) movably connected to the outside of the support platform (2), and a concrete cleaning assembly arranged on the rear side wall of the test box (1), characterized in that: A support frame (4) is provided on one side of the test box (1), a screw rod (5) is rotatably connected to the bottom of the support frame (4), a motor (6) is installed at the bottom end of the screw rod (5) and located inside the test box (1), a limit rod (7) is provided on the other side of the test box (1), a sliding block (8) which is transmission-threadedly connected to the screw rod (5) is provided on one side of the enclosure (3), and a sliding sleeve (9) which is slidably connected to the limit rod (7) is provided on the other side of the enclosure (3).

2. A concrete crack resistance test device according to claim 1, characterized in that: The enclosure (3) is rectangular, and a heating block (10) is arranged on the inner side of the enclosure (3), and a heat conducting plate (11) which is in contact with the support platform (2) is arranged on the inner side of the heating block (10).

3. A concrete crack resistance testing device according to claim 1, characterized in that: The concrete cleaning assembly comprises an electric telescopic rod (12) arranged at the rear side of a support platform (2) and connected to the inner side wall of a test box (1), a scraper (13) arranged at the rear end of the electric telescopic rod (12), a notch (14) provided at the bottom of the scraper (13) and located close to a side of the electric telescopic rod (12), and a cleaning brush (15) installed at the bottom of the notch (14).

4. A concrete crack resistance test device according to claim 3, characterized in that: The scraper (13) is arranged in a U shape, and the two ends of the scraper (13) are exactly in contact with the two sides of the support platform (2).

5. A concrete crack resistance testing device according to claim 1, characterized in that: The pressurizing mechanism comprises a hydraulic cylinder (16) arranged on the inner top wall of the test box (1), a pressure sensor (17) arranged at the output end of the hydraulic cylinder (16), and a pressurizing block (18) fixedly connected to the bottom of the pressure sensor (17).

6. A concrete crack resistance testing device according to claim 1, characterized in that: An inverted U-shaped installation frame (19) is arranged on the outside of the test box (1), a slide rail (20) is arranged on one side of the installation frame (19), and a transparent protective door (21) is slidably connected inside the slide rail (20).

7. A concrete crack resistance test device according to claim 1, characterized in that: A slot (22) is provided inside the test box (1) and below the installation frame (19), and a receiving drawer (23) is slidably connected inside the slot (22).

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