Concrete resiliometer calibration device

Abstract

The utility model relates to the technical field of rebound apparatuses, in particular to a concrete rebound apparatus calibration device. The device comprises a base plate, a supporting frame is installed on the base plate, an upper bearing frame is installed above the supporting frame, a side plate is arranged on the base plate at the side position of the supporting frame, a plurality of lower supporting plates used for supporting the rebound apparatus are arranged in the supporting frame, and a pressing assembly used for pressing the rebound apparatus downwards is arranged at the upper side position in the supporting frame. A jacking telescopic cylinder is arranged on the side, opposite to the side plate, in the supporting frame, and a movable block is connected to the jacking telescopic cylinder; a side supporting plate is arranged on the base plate, a plurality of linear rails are connected between the side supporting plate and the side plate, a movable plate is arranged on sliding blocks of the linear rails, a clamping assembly is arranged on the movable plate, a detection structure is arranged below the movable plate, and a control screen is arranged on the base plate; the rebound apparatus is fixed from multiple angles, the stability of the rebound apparatus is guaranteed, the telescopic cylinder is adopted for control, manual operation is reduced, and the specific condition of the rebound apparatus can be accurately analyzed through the tension sensor and the distance measuring instrument.

Description

Technical Field

[0001] This utility model relates to the field of rebound hammer technology, and specifically to a concrete rebound hammer calibration device. Background Technology

[0002] A concrete rebound hammer is a device used for quality testing in building construction, assessing the compressive strength of concrete structures. It works by using a spring-driven impact hammer to strike the concrete surface, measuring the rebound value (the height the hammer bounces back), and calculating the compressive strength based on the correlation between the rebound value and concrete strength. The accuracy of the rebound hammer directly affects the reliability of the test results; therefore, it needs to be calibrated regularly to ensure its performance meets standard requirements.

[0003] Most existing calibration devices are designed manually, requiring manual operation during testing. The results are obtained by visually observing the values ​​and then calculating them, which is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0004] The purpose of this invention is to provide a reasonably designed concrete rebound hammer calibration device that addresses the defects and shortcomings of existing technologies, thereby solving the aforementioned deficiencies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: It includes a base plate, a support frame mounted on the base plate, an upper bearing frame mounted above the support frame, a side plate on the base plate at the side of the support frame, several lower support plates for supporting the rebound spring inside the support frame, a clamping assembly for pressing the rebound spring downward at the upper side of the support frame, a jacking telescopic cylinder on the side of the support frame opposite to the side plate, and a movable block connected to the jacking telescopic cylinder; a side support plate on the base plate, several linear guides connected between the side support plates, a movable plate on the slider of the linear guide, a clamping assembly on the movable plate, a detection structure below the movable plate, and a control screen on the base plate.

[0006] Preferably, the clamping assembly includes clamping telescopic cylinders symmetrically installed on both sides of the movable plate, each clamping telescopic cylinder having a clamping head connected to its front end, and each clamping head having an arc-shaped groove at its front end for clamping the spring rod of the rebound device.

[0007] Preferably, the detection structure includes a drive telescopic cylinder mounted on the side support plate. The head of the drive telescopic cylinder moves through the side support plate and is connected to a tension sensor. The tension sensor is installed below the movable plate. Rangefinders are respectively provided at both ends of the inner side of the side support plate, and fixed plates opposite to the rangefinders are respectively provided at both ends of the lower part of the movable plate.

[0008] Preferably, the clamping assembly includes several clamping telescopic cylinders vertically downward disposed within the upper support frame. The movable rod of the clamping telescopic cylinder passes through the top wall of the support frame and is connected to a connecting plate. A head clamping plate and a rear clamping plate are respectively connected to both ends of the connecting plate. An arc-shaped groove is opened on the top side of the lower support plate and the lower side of the rear clamping plate. The combined shape of the grooves of the lower support plate and the rear clamping plate matches the shape of the rebounder housing. A slot is opened on the upper side of the side plate and the lower side of the head clamping plate. The combined shape of the two slots matches the shape of the inclined surface of the rebounder head.

[0009] Preferably, guide strips are provided on both sides of the head clamping plate, and a sliding groove matching the guide strip is opened in the slot of the side plate, and the guide strip is slidably installed in the sliding groove; a limiting block is provided at both ends of the bottom surface of the rear clamping plate, and a limiting groove matching the locking block is opened at both ends of the upper side of the lower support plate.

[0010] Preferably, the front end of the movable block is provided with a buffer pad, and the rear pressing plate, lower support plate, head pressing plate, side plate, and clamping head are all provided with anti-slip coatings on the surfaces that come into contact with the rebound spring.

[0011] The beneficial effects of this utility model after adopting the above structure are:

[0012] 1. This utility model can fix the rebound spring from multiple angles by using a clamping component and a top-moving telescopic cylinder, ensuring its stability and preventing movement during calibration. The telescopic cylinder control also reduces manual operation.

[0013] This invention uses a clamping assembly to fix the spring rod and a linear guide for installation, which minimizes friction and reduces the impact of friction on the calibration results when the sliding plate moves. The tension sensor installed in series can acquire the tension value in real time, and the specific situation of the rebound hammer can be accurately analyzed in conjunction with the rangefinder.

[0014] This invention employs dual rangefinders, which can simultaneously measure distances to obtain the travel distance of the movable plate, preventing measurement errors caused by skewing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the appearance structure of this utility model;

[0016] Figure 2 This is a front view of the present invention;

[0017] Figure 3 This is a partial cross-sectional view of the structure below the movable plate in this utility model;

[0018] Figure 4 This is a schematic diagram of the clamping structure in this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Base plate; 2. Support frame; 3. Upper load-bearing frame; 4. Pressing telescopic cylinder; 5. Connecting plate; 6. Head pressing plate; 7. Guide strip; 8. Side plate; 9. Rear pressing plate; 10. Lower support plate; 11. Pushing telescopic cylinder; 12. Movable block; 13. Buffer pad; 14. Control panel; 15. Movable plate; 16. Clamping telescopic cylinder; 17. Clamping head; 18. Side support plate; 19. Drive telescopic cylinder; 20. Tension sensor; 21. Fixing plate; 22. Rangefinder; 23. Linear rail. Detailed Implementation

[0021] 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.

[0022] See Figures 1-4 As shown, it includes a base plate 1, a support frame 2 mounted on the base plate 1, an upper bearing frame 3 mounted above the support frame 2, a side plate 8 on the base plate 1 at the side of the support frame 2, several lower support plates 10 for supporting the rebound spring inside the support frame 2, a clamping assembly for pressing the rebound spring downward at the upper side inside the support frame 2, a top-moving telescopic cylinder 11 on the side of the support frame 2 opposite to the side plate 8, and a movable block 12 connected to the top-moving telescopic cylinder 11; a side support plate 18 on the base plate 1, several linear guides 23 connected between the side support plate 18 and the side plate 8, a movable plate 15 on the slider of the linear guide 23, a clamping assembly on the movable plate 15, a detection structure below the movable plate 15, and a control screen 14 on the base plate 1;

[0023] See Figures 1-4 As shown, the clamping assembly includes clamping telescopic cylinders 16 symmetrically mounted on both sides of the movable plate 15. Each clamping telescopic cylinder 16 has a clamping head 17 connected to its front end. Each clamping head 17 has an arc-shaped groove at its front end for clamping the spring rod of the rebound device.

[0024] As an optimized solution of this utility model, the clamping head 17 is driven by the clamping telescopic cylinder 16 to clamp the spring rod of the rebound device, so that the spring rod and the movable plate 15 can be relatively fixed.

[0025] See Figures 1-3As shown, the detection structure includes a drive telescopic cylinder 19 installed on the side support plate 18. The head of the drive telescopic cylinder 19 moves through the side support plate 18 and is connected to a tension sensor 20. The tension sensor 20 is installed below the movable plate 15. Rangefinders 22 are respectively provided at both ends of the inner side of the side support plate 18. Fixed plates 21 opposite to the rangefinders 22 are respectively provided at both ends of the lower part of the movable plate 15.

[0026] As an optimized solution of this utility model, the telescopic cylinder 19 drives the movable plate 15 to slide along the linear rail 23, eliminating the need for manual operation. The tension sensor 20 is connected in series, which can quickly and accurately obtain the real-time tension value. At the same time, the two rangefinders 22 can detect the movement distance of the movable plate 15 on both sides, thereby accurately calculating the stroke of the movable plate 15 and preventing inaccurate measurement of the stroke on one side due to tilting of the movable plate 15 caused by installation inaccuracy or wear.

[0027] See Figures 1-4 As shown, the clamping assembly includes several clamping telescopic cylinders 4 vertically downwardly disposed within the upper support frame 3. The movable rod of the clamping telescopic cylinder 4 passes through the top wall of the support frame 2 and is connected to a connecting plate 5. The two ends of the connecting plate 5 are respectively connected to a head clamping plate 6 and a rear clamping plate 9. The top side of the lower support plate 10 and the lower side of the rear clamping plate 9 are respectively provided with arc-shaped grooves. The combined shape of the grooves of the lower support plate 10 and the rear clamping plate 9 matches the shape of the rebounder housing. The upper side of the side plate 8 and the lower side of the head clamping plate 6 are respectively provided with slots. The combined shape of the two slots matches the shape of the inclined surface of the rebounder head.

[0028] Guide strips 7 are provided on both sides of the head clamping plate 6. The slot of the side plate 8 has a sliding groove that matches the guide strips 7. The guide strips 7 are slidably installed in the sliding groove. Limiting blocks are provided at both ends of the bottom surface of the rear clamping plate 9. Limiting grooves that match the locking blocks are provided at both ends of the upper side of the lower support plate 10.

[0029] As an optimized solution of this utility model, the connecting plate 5, the rear pressing plate 9 and the head pressing plate 6 below are pressed down by the pressing telescopic cylinder 4, thereby pressing the rebound spring downward and fixing it to prevent the rebound spring from moving up and down. With the cooperation of the jacking telescopic cylinder 11 pushing forward, the rebound spring can be fixed. At the same time, the guide strip 7, the slide, the limiting block and the limiting groove can be aligned to ensure that no misalignment occurs after connection.

[0030] See Figures 1-4 As shown, the front end of the movable block 12 is provided with a buffer pad 13, and the surfaces of the rear pressing plate 9, the lower support plate 10, the head pressing plate 6, the side plate 8, and the clamping head 17 that are in contact with the rebounder are all provided with an anti-slip coating.

[0031] As an optimized solution of this utility model, the buffer pad 13 can absorb kinetic energy and prevent the impact of the push-pull telescopic cylinder 11 when it pushes the rebounder from damage, while protecting the moving block 12; the anti-slip coating can enhance the stability of the rebounder after installation.

[0032] The usage process of this utility model:

[0033] First, place the rebound hammer on the lower support plate 10, with its head placed in the slot of the side plate 8. Then, start the device. While the telescopic cylinder 4 drives the connecting plate 5 to press down, it pushes the telescopic cylinder 11 forward to press it down. Then, move the clamping head 17 to both sides of the rebound hammer's impact rod and start the clamping telescopic cylinder 16 so that the clamping head 17 clamps the impact rod. Then, the position of the movable plate 15 can be observed in real time through the rangefinder 22. Start the drive telescopic cylinder 19, and the control panel 14 can obtain the real-time tension value and the movement distance of the impact rod through the tension sensor 20. The rebound hammer can then be calibrated by numerical detection.

[0034] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A device for calibrating a concrete rebound hammer, comprising a base plate (1), characterised in that: A support frame (2) is installed on the base plate (1), an upper bearing frame (3) is installed above the support frame (2), a side plate (8) is provided on the base plate (1) at the side position of the support frame (2), several lower support plates (10) for supporting the rebounder are provided inside the support frame (2), a clamping component for pressing the rebounder downward is provided on the upper side inside the support frame (2), a top-moving telescopic cylinder (11) is provided on the side opposite to the side plate (8) inside the support frame (2), and a movable block (12) is connected to the top-moving telescopic cylinder (11); a side support plate (18) is provided on the base plate (1), several linear rails (23) are connected between the side support plate (18) and the side plate (8), a movable plate (15) is provided on the slider of the linear rail (23), a clamping component is provided on the movable plate (15), a detection structure is provided below the movable plate (15), and a control screen (14) is provided on the base plate (1).

2. The concrete rebound hammer calibration device according to claim 1, characterized in that: The clamping assembly includes clamping telescopic cylinders (16) symmetrically installed on both sides of the movable plate (15). Each clamping telescopic cylinder (16) has a clamping head (17) connected to its front end. Each clamping head (17) has an arc-shaped groove at its front end for clamping the spring rod of the rebound device.

3. A device for calibrating a rebound hammer according to claim 1, wherein: The detection structure includes a drive telescopic cylinder (19) installed on the side support plate (18). The head of the drive telescopic cylinder (19) moves through the side support plate (18) and is connected to a tension sensor (20). The tension sensor (20) is installed below the movable plate (15). A rangefinder (22) is provided at both ends of the inner side of the side support plate (18). A fixed plate (21) is provided at both ends of the movable plate (15) below, which is opposite to the rangefinder (22).

4. A device for calibrating a rebound hammer according to claim 1, wherein: The clamping assembly includes several clamping telescopic cylinders (4) arranged vertically downward in the upper support frame (3). The movable rod of the clamping telescopic cylinder (4) passes through the top wall of the support frame (2) and is connected to a connecting plate (5). The two ends of the connecting plate (5) are respectively connected to a head clamping plate (6) and a rear clamping plate (9). The top side of the lower support plate (10) and the lower side of the rear clamping plate (9) are respectively provided with arc-shaped grooves. The combined shape of the grooves of the lower support plate (10) and the rear clamping plate (9) matches the shape of the rebounder housing. The upper side of the side plate (8) and the lower side of the head clamping plate (6) are respectively provided with slots. The combined shape of the two slots matches the shape of the inclined surface of the head of the rebounder.

5. A device for calibrating a rebound hammer according to claim 4, wherein: The head pressing plate (6) is provided with guide strips (7) on both sides, and the side plate (8) has a slot that matches the guide strips (7). The guide strips (7) are slidably installed in the slots. The bottom of the rear pressing plate (9) is provided with limiting blocks at both ends, and the upper side of the lower support plate (10) has limiting slots that match the blocks at both ends.

6. A device for calibrating a rebound hammer according to claim 5, wherein: The front end of the movable block (12) is provided with a buffer pad (13), and the surfaces of the rear pressing plate (9), lower support plate (10), head pressing plate (6), side plate (8), and clamping head (17) that are in contact with the rebounder are all provided with anti-slip coatings.

Images