Device for detecting compressive strength of concrete by rebound method

Abstract

The utility model discloses a concrete compressive strength detection device adopting a rebound method, relates to the technical field of concrete compressive strength detection, and solves the problems that after a concrete test block is detected, the test block is completely discharged by opening a supporting plate, so that chippings on the concrete test block completely fall off, and the test block cannot be damaged. The device solves the problems that the detection effect is affected and the use efficiency of the device is reduced in the subsequent detection work due to the fact that the concrete test block cannot be compared with the subsequently detected concrete test block when the concrete test block collides with the concrete test block, and impurity particles on the concrete test block are also attached to the collided part at the lower end of the rebound instrument, and comprises a base and a U-shaped frame, the U-shaped frame is fixedly mounted at the upper end of the base, through the arrangement of the linear motor and the cleaning brush, the detected rebound detector can be conveniently moved to the position of the cleaning brush, the lower end of the rebound detector can be conveniently cleaned through the cleaning brush, and subsequent detection work cannot be affected.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete compressive strength testing, specifically a concrete compressive strength testing device using the rebound method. Background Technology

[0002] The compressive strength of concrete refers to the pressure that a unit area can withstand under the action of external forces, and it also refers to the ability to resist compressive damage.

[0003] A search revealed Chinese patent publication number CN219573814U, which discloses a rebound method concrete compressive strength testing device. The device includes a workbench with a support pile connected above it. The support pile has a cavity inside, and slides communicating with the cavity are located on the middle of the left and right side walls of the support pile. A threaded shaft passes between the inner sides of the two sets of slides. A positioning frame is connected to the left end of the threaded shaft, and a rebound hammer is installed inside the positioning frame. A hand-tightening nut is connected to the outside of the threaded shaft. A motor is connected to the upper right side of the support pile, and an eccentric cam is connected to the shaft end of the motor. A pressing block is located on the outside of the threaded shaft. The advantages of this invention compared to existing technologies are: the motor, eccentric cam, and pressing block on the outside of the threaded shaft work together to push the rebound hammer inside the positioning frame downwards, allowing the rebound hammer to closely contact the concrete fragment for testing. The position of the rebound hammer can be adjusted by moving the threaded shaft left and right, and by using the hand-tightening nut, so that the rebound hammer can detect different points on the test surface of the test block.

[0004] However, after testing the concrete test block, opening the support plate to completely remove the test block will cause all the debris on the concrete test block to fall off, making it impossible to compare the concrete test block with the concrete test blocks to be tested later. At the same time, the impact part at the lower end of the rebound hammer will also have impurities from the concrete test block adhering to it, which will affect the test results in subsequent testing work and reduce the efficiency of the device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a rebound method concrete compressive strength testing device. This device solves the problem that after testing a concrete specimen, opening the support plate to completely remove the specimen causes debris to fall off, preventing comparison with subsequent test specimens. Furthermore, the impact point at the bottom of the rebound hammer also traps impurities from the concrete specimen, affecting the testing results and reducing the device's efficiency in subsequent tests.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rebound method concrete compressive strength testing device, comprising a base and a U-shaped frame. The U-shaped frame is fixedly installed on the upper end of the base. A linear motor is fixedly installed on the top surface inside the U-shaped frame. A first cylinder is fixedly installed on the moving end of the linear motor. A rebound tester is fixedly installed on the output shaft of the first cylinder. A connecting plate is fixedly installed on the moving end of the linear motor. A moving groove is provided inside the bottom surface of the connecting plate. A pressure plate is slidably connected inside the moving groove. Tension springs are fixedly installed at equal intervals between the pressure plate and the side wall inside the moving groove. The connecting plate is located on the right side of the rebound tester.

[0007] Preferably, a support plate is fixedly installed on the left side wall inside the U-shaped frame, a rotating seat is rotatably connected to the top surface of the support plate, a cleaning brush is fixedly installed on the top surface of the rotating seat, a rotary motor is fixedly installed at the bottom of the support plate, and the output shaft of the rotary motor is fixedly connected to the central axis of the rotating seat through the interior of the support plate. The top surface of the cleaning brush is higher than the bottom surface of the rebound hammer when it is in the initial position, which facilitates the cleaning of the side wall of the concrete rebound hammer.

[0008] Preferably, a first fixing plate and a second fixing plate are fixedly installed on both sides of the top surface of the base, and both are located inside the U-shaped frame. A second cylinder is symmetrically fixedly installed on the right side wall of the first fixing plate, and a clamping plate is provided on the left side of the first fixing plate. The output shafts of the second cylinders are fixedly connected to the side wall of the clamping plate through the interior of the first fixing plate, thereby facilitating the placement of the concrete test block between the first fixing plate and the second fixing plate and fixing its position.

[0009] Preferably, an electric push rod is fixedly installed on the upper end of the base and is located at the front end of the first fixed plate and the second fixed plate. The output shaft of the electric push rod is fixedly connected to a push plate, so that the tested concrete test block can be easily pushed out.

[0010] Preferably, the bottom surface of the pressure plate is rotatably connected with multiple ball bearings at equal intervals, thereby facilitating the movement of the pressure plate on the top surface of the concrete block.

[0011] Preferably, the rotating seat is circular and its diameter is larger than that of the rebound detector, so that the sidewalls of the rebound detector can be completely cleaned.

[0012] This invention provides a device for testing the compressive strength of concrete using the rebound method. It has the following advantages:

[0013] 1. The rebound concrete compressive strength testing device, when used, can easily move the rebound tester to the position of the cleaning brush after testing by means of the set linear motor and cleaning brush, and can easily clean the lower end of the rebound tester by the cleaning brush without affecting the subsequent testing work.

[0014] 2. When using this rebound concrete compressive strength testing device, the connection plate and pressure plate can shield the testing location of the concrete block to prevent the generated debris from splashing onto other parts of the concrete block, thus preventing any impact when testing different locations. Attached Figure Description

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

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

[0017] Figure 3 This is a schematic diagram of the pressure plate structure of this utility model.

[0018] In the diagram, 1-base, 2-U-shaped frame, 3-linear motor, 4-connecting plate, 5-first cylinder, 6-rebound detector, 7-support plate, 8-rotary motor, 9-rotating seat, 10-cleaning brush, 11-pressure plate, 12-first fixing plate, 13-clamping plate, 14-electric push rod, 15-push plate, 16-second fixing plate, 17-tension spring, 18-moving groove, 19-handle, 20-ball bearing, 21-second cylinder. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Please see Figure 1-3This utility model provides a concrete compressive strength testing device using the rebound method, including a base 1 and a U-shaped frame 2. The U-shaped frame 2 is fixedly installed on the upper end of the base 1. A linear motor 3 is fixedly installed on the top surface inside the U-shaped frame 2. A first cylinder 5 is fixedly installed on the moving end of the linear motor 3. A rebound detector 6 is fixedly installed on the output shaft of the first cylinder 5. A connecting plate 4 is fixedly installed on the moving end of the linear motor 3. A moving groove 18 is provided inside the bottom surface of the connecting plate 4. A pressure plate 11 is slidably connected inside the moving groove 18. Tension springs 17 are fixedly installed at equal intervals between the pressure plate 11 and the side wall inside the moving groove 18. The connecting plate 4 is disposed on the rebound detector 6. On the right side, multiple ball bearings 20 are rotatably connected at equal intervals inside the bottom surface of the pressure plate 11. When testing the concrete block, the linear motor 3 is turned on to move the rebound tester 6 to the part of the concrete block to be tested. While moving, the handle 19 is held to move the pressure plate 11 upward. Then the handle 19 is released, and the tension spring 17 is used to move the pressure plate 11 downward and press it on the upper end of the concrete block. The first cylinder 5 is turned on to move the rebound tester 6 downward to test the upper end of the concrete block. Then the linear motor 3 is used to move the position of the rebound tester 6 again to test different positions on the concrete block.

[0022] Example 2

[0023] To facilitate cleaning of the rebound detector 6, in this embodiment, as follows: Figure 1-2 As shown, a support plate 7 is fixedly installed on the left side wall inside the U-shaped frame 2. A rotating seat 9 is rotatably connected inside the top surface of the support plate 7. A cleaning brush 10 is fixedly installed on the top surface of the rotating seat 9. A rotary motor 8 is fixedly installed at the bottom of the support plate 7. The output shaft of the rotary motor 8 is fixedly connected to the central axis of the rotating seat 9 through the inside of the support plate 7. The top surface of the cleaning brush 10 is higher than the bottom surface of the rebound tester 6 when it is in the initial position. The rotating seat 9 is circular and its diameter is larger than that of the rebound tester 6. After the concrete block is tested, the linear motor 3 is used to move the concrete rebound tester 6 above the cleaning brush 10. At the same time, the rotary motor 8 is turned on to make the rotating seat 9 rotate, which allows the cleaning brush 10 to clean the side wall of the concrete rebound tester 6.

[0024] Example 3

[0025] To facilitate the clamping, securing, and ejection of the concrete test block, in this embodiment, as follows: Figure 1-2As shown, a first fixing plate 12 and a second fixing plate 16 are fixedly installed on both sides of the top surface of the base 1, and both are located inside the U-shaped frame 2. A second cylinder 21 is symmetrically fixedly installed on the right side wall of the first fixing plate 12, and a clamping plate 13 is provided on the left side of the first fixing plate 12. The output shaft of the second cylinder 21 is fixedly connected to the side wall of the clamping plate 13 through the interior of the first fixing plate 12. An electric push rod 14 is fixedly installed at the upper end of the base 1 and is located at the front end of the first fixing plate 12 and the second fixing plate 16. The output shaft of the electric push rod 14 is fixedly connected to a push plate 15. The concrete test block is placed between the first fixing plate 12 and the second fixing plate 16. Then, the second cylinder 21 is opened, so that the clamping plate 13 moves the position of the concrete block, so that the clamping plate 13 and the second fixing plate 16 clamp the concrete test block firmly. After the concrete test block is tested, the electric push rod 14 is opened, and the push plate 15 is used to push the concrete block out of the base 1.

[0026] It should be noted that, in this embodiment, when using the rebound method concrete compressive strength testing device, if... Figure 1-3 As shown, when testing the concrete block, the concrete test block is placed between the first fixing plate 12 and the second fixing plate 16. Then, the second cylinder 21 is opened, causing the clamping plate 13 to move relative to the concrete block, thus securing the concrete test block firmly between the clamping plate 13 and the second fixing plate 16. By turning on the linear motor 3, the rebound tester 6 is moved to the area on the concrete block to be tested. While moving, the handle 19 is held, and the pressure plate 11 is moved upwards. Then, the handle 19 is released, and the pressure plate 11 is moved downwards using the tension spring 17, pressing down on the upper end of the concrete block. The first cylinder 5 is opened, causing the rebound hammer 6 to move downwards and test the upper end of the concrete block. Then, the position of the rebound hammer 6 is moved again by the linear motor 3 to test different positions on the concrete block. After the concrete block is tested, the concrete rebound hammer 6 is moved above the cleaning brush 10 by the linear motor 3. At the same time, the rotary motor 8 is turned on, causing the rotating seat 9 to rotate, which allows the cleaning brush 10 to clean the side wall of the concrete rebound hammer 6. At the same time, the electric push rod 14 is turned on, and the push plate 15 pushes the concrete block to the outside of the base 1.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for testing the compressive strength of concrete using the rebound method, characterized in that: The device includes a base (1) and a U-shaped frame (2). The U-shaped frame (2) is fixedly installed on the upper end of the base (1). A linear motor (3) is fixedly installed on the top surface inside the U-shaped frame (2). A first cylinder (5) is fixedly installed on the moving end of the linear motor (3). A springback detector (6) is fixedly installed on the output shaft of the first cylinder (5). A connecting plate (4) is fixedly installed on the moving end of the linear motor (3). A moving groove (18) is provided inside the bottom surface of the connecting plate (4). A pressure plate (11) is slidably connected inside the moving groove (18). Tension springs (17) are fixedly installed at equal intervals between the pressure plate (11) and the side wall inside the moving groove (18). The connecting plate (4) is located on the right side of the springback detector (6).

2. The rebound concrete compressive strength testing device according to claim 1, characterized in that: A support plate (7) is fixedly installed on the left side wall inside the U-shaped frame (2). A rotating seat (9) is rotatably connected inside the top surface of the support plate (7). A cleaning brush (10) is fixedly installed on the top surface of the rotating seat (9). A rotary motor (8) is fixedly installed at the bottom of the support plate (7). The output shaft of the rotary motor (8) is fixedly connected to the central axis of the rotating seat (9) through the interior of the support plate (7). The top surface of the cleaning brush (10) is higher than the bottom surface of the rebound detector (6) when it is in the initial position.

3. The concrete compressive strength testing device according to claim 1, characterized in that: The base (1) has a first fixing plate (12) and a second fixing plate (16) fixedly installed on both sides of its top surface, and both are located inside the U-shaped frame (2). The right side wall of the first fixing plate (12) is symmetrically fixedly installed with a second cylinder (21), and a clamping plate (13) is provided on the left side of the first fixing plate (12). The output shaft of the second cylinder (21) is fixedly connected to the side wall of the clamping plate (13) through the interior of the first fixing plate (12).

4. The rebound concrete compressive strength testing device according to claim 3, characterized in that: An electric push rod (14) is fixedly installed on the upper end of the base (1) and is located at the front end of the first fixed plate (12) and the second fixed plate (16). The output shaft of the electric push rod (14) is fixedly connected to a push plate (15).

5. The concrete compressive strength testing device according to claim 1, characterized in that: The bottom surface of the pressure plate (11) is rotatably connected with multiple balls (20) at equal intervals.

6. The rebound concrete compressive strength testing device according to claim 2, characterized in that: The rotating seat (9) is circular and its diameter is larger than that of the rebound detector (6).

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