A device for detecting the rebound compressive strength of concrete

Abstract

This utility model relates to the field of building inspection equipment technology, and discloses a concrete rebound compressive strength testing device, including a mounting plate. A movable frame is movably connected to the upper surface of the mounting plate, and a movable plate is movably connected to the inner surface of the movable frame. A rebound hammer is movably mounted on the rear side of the upper surface of the movable plate, and a No. 1 motor is fixedly mounted on the upper surface of the movable frame. This utility model, by setting up a movable frame, movable plate, rebound hammer, active rod, and driven rod, allows the circular shaft and active rod to rotate when the No. 1 motor starts running. This causes the driven rod to rotate about the other end of the active rod as its axis. Simultaneously, the other end of the driven rod drives the movable plate, causing the movable plate to move upwards along the inner surface of the movable frame. The overall height of the movable plate gradually increases, thus meeting the testing needs of walls at different heights and avoiding the safety risks associated with operators climbing to perform inspections.

Description

Technical Field

[0001] This utility model relates to the field of building testing equipment technology, and more specifically, to a concrete rebound compressive strength testing device. Background Technology

[0002] Concrete rebound testing is a non-destructive testing method that uses a rebound hammer to determine the surface hardness of concrete. It is used to indirectly assess the compressive strength of concrete. During the test, the rebound hammer strikes the concrete surface, and the strength range is estimated based on the rebound value. This method is simple to operate and highly efficient, and is suitable for rapid on-site screening. However, it needs to be combined with other methods to improve accuracy. The test results are affected by factors such as surface condition and carbonation depth. Standardized operation is required to reduce errors. This technology is widely used in engineering acceptance and quality assessment and is one of the commonly used methods for testing the strength of concrete structures.

[0003] A search revealed that CN220854391 U, a publication of a concrete rebound hammer, addresses the issue in its background section that existing rebound hammers with a single cylindrical casing lack external gripping mechanisms for applying force during pressing tests. This leads to difficulty in controlling vertical stability, causing inconvenience and affecting test accuracy. The paper addresses this problem by incorporating a rebound hammer body, a straightening mechanism, and a support mechanism. However, in this technology, when the wall surface is large, accurate test results often require setting the test point in the middle of the wall. In this case, operators must use a climbing device to perform rebound testing, which poses a safety risk. Therefore, improvements are needed. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a concrete rebound compressive strength testing device, which has the advantage of safe testing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a concrete rebound compressive strength testing device, comprising a mounting plate, a movable frame movably connected to the upper surface of the mounting plate, a movable plate movably connected to the inner surface of the movable frame, a rebound hammer movably mounted on the rear side of the upper surface of the movable plate, a No. 1 motor fixedly mounted on the upper surface of the movable frame, a round shaft fixedly sleeved at the other end of the output shaft of the No. 1 motor, a drive rod hinged to the outer surface of the round shaft, a driven rod hinged to the other end of the drive rod, and the other end of the driven rod hinged to the front surface of the movable plate.

[0006] As a preferred technical solution of this utility model, the upper surface of the rebounder is movably connected to a pressure block, and bolts are movably sleeved on both the left and right sides of the upper surface of the pressure block. The bottom end of the bolt passes through the pressure block and the movable plate in sequence and extends into the interior of the movable plate. The outer surface of the bolt and the inner surface of the movable plate are threaded together.

[0007] As a preferred technical solution of this utility model, vertical limiting strips are fixedly connected to the left and right sides of the bottom of the inner surface of the movable frame. The top of the vertical limiting strips penetrates through the movable plate and extends to the top of the inner surface of the movable frame. The outer surface of the vertical limiting strips is movably connected to the outer surface of the movable plate. Movable wheels are movably installed on the left and right sides of the rear surface of the mounting plate.

[0008] As a preferred technical solution of this utility model, U-shaped frames are movably connected to both the left and right sides of the outer surface of the movable frame. A positioning plate is fixedly connected to the rear side of the inner surface of the U-shaped frame. The lower surfaces of the U-shaped frame and the positioning plate are fixedly connected to the upper surface of the mounting plate. A drive motor is fixedly installed on the rear surface of the positioning plate. A threaded rod is fixedly sleeved at the other end of the output shaft of the drive motor. The front end of the threaded rod passes through the positioning plate, the movable frame and the U-shaped frame in sequence and extends to the front surface of the U-shaped frame. The outer surface of the threaded rod is threadedly sleeved with the inner surface of the movable frame.

[0009] As a preferred embodiment of this utility model, hollow plates are fixedly connected to both the front and rear sides of the lower surface of the mounting plate, and there are two hollow plates. A rough block is fixedly connected to the bottom of the inner surface between the two hollow plates. A movable block is movably connected to the bottom of the inner surface of each of the two hollow plates, and there are two movable blocks. A movable wheel is movably installed on the lower surface of the two movable blocks. A connecting plate located above the rough block is fixedly connected to the top of the inner surface between the two movable blocks. The outer surface of the connecting plate is movably connected to the inner surface of the two hollow plates, and the lower surface of the connecting plate is movably connected to the upper surface of the rough block.

[0010] As a preferred technical solution of this utility model, vertical rods are fixedly connected to both the left and right sides of the upper surface of the connecting plate. The top of the vertical rods penetrates the mounting plate and extends to the top of the mounting plate and is fixedly connected to a connecting block. A cylinder is fixedly connected to the outer surface of the connecting block.

[0011] As a preferred technical solution of this utility model, a second motor is fixedly installed on both the left and right sides of the upper surface of the mounting plate. A rotating shaft is fixedly sleeved on the other end of the output shaft of the second motor. A driving rod is fixedly sleeved on the outer surface of the rotating shaft. The inner surface of the driving rod is movably connected to the outer surface of the cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention features a movable frame, a movable plate, a rebound spring, a driving rod, and a driven rod. When the first motor starts running, the circular shaft and the driving rod begin to rotate. This causes the driven rod to rotate around the other end of the driving rod. Simultaneously, the other end of the driven rod drives the movable plate, causing it to rise along the inner surface of the movable frame. As a result, the overall height of the movable plate gradually increases, thus meeting the needs for inspecting walls at different heights and avoiding the safety risks associated with operators climbing to inspect walls. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a side view of the present invention.

[0016] Figure 3 This is a cross-sectional view of the side of the present invention;

[0017] Figure 4 This is a cross-sectional structural diagram of the vertical rod of this utility model;

[0018] Figure 5 This is a cross-sectional structural diagram of the bolt of this utility model;

[0019] Figure 6 This is a cross-sectional view of the connecting plate of this utility model.

[0020] In the diagram: 1. Mounting plate; 2. Movable frame; 3. Movable plate; 4. Rebound spring; 5. Motor No. 1; 6. Round shaft; 7. Driving rod; 8. Driven rod; 9. Pressure block; 10. Bolt; 11. Vertical limit bar; 12. U-shaped frame; 13. Positioning plate; 14. Drive motor; 15. Threaded rod; 16. Hollow plate; 17. Moving block; 18. Moving wheel; 19. Rough block; 20. Connecting plate; 21. Vertical rod; 22. Connecting block; 23. Cylinder; 24. Motor No. 2; 25. Rotating shaft; 26. Driving rod; 27. Movable wheel. 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] like Figures 1 to 6As shown, this utility model provides a concrete rebound compressive strength testing device, including a mounting plate 1, a movable frame 2 movably connected to the upper surface of the mounting plate 1, a movable plate 3 movably connected to the inner surface of the movable frame 2, a rebound hammer 4 movably mounted on the rear side of the upper surface of the movable plate 3, a first motor 5 fixedly mounted on the upper surface of the movable frame 2, a round shaft 6 fixedly sleeved at the other end of the output shaft of the first motor 5, a drive rod 7 hinged to the outer surface of the round shaft 6, a driven rod 8 hinged to the other end of the drive rod 7, and the other end of the driven rod 8 hinged to the front surface of the movable plate 3; when the operator starts the first motor 5, the round shaft 6 and the drive rod 7 will start to rotate, at which time the other end of the drive rod 7 will drive the driven rod 8 and cause the driven rod 8 to start rotating, at the same time the other end of the driven rod 8 will drive the movable plate 3, thereby causing the movable plate 3 to start moving.

[0023] The upper surface of the rebound hammer 4 is movably connected to a pressure block 9. Bolts 10 are movably sleeved on both the left and right sides of the upper surface of the pressure block 9. The bottom end of the bolt 10 passes through the pressure block 9 and the movable plate 3 in sequence and extends into the interior of the movable plate 3. The outer surface of the bolt 10 and the inner surface of the movable plate 3 are threaded together. The design of the pressure block 9 and the movable plate 3 can clamp the outer surface of the rebound hammer 4, while the design of the bolt 10 can press the pressure block 9 downward, thereby fixing the rebound hammer 4 between the movable plate 3 and the pressure block 9.

[0024] Vertical limiting strips 11 are fixedly connected to the left and right sides of the bottom of the inner surface of the movable frame 2. The top of the vertical limiting strips 11 penetrates the movable plate 3 and extends to the top of the inner surface of the movable frame 2. The outer surface of the vertical limiting strips 11 is movably connected to the outer surface of the movable plate 3. Movable wheels 27 are movably installed on the left and right sides of the rear surface of the mounting plate 1. The design of the vertical limiting strips 11 restricts the overall movement direction of the movable plate 3, thereby ensuring that the orientation of the rebound hammer 4 is always perpendicular to the wall during the movement of the movable plate 3, thus ensuring the accuracy of the rebound hammer 4 test results.

[0025] The movable frame 2 has U-shaped frames 12 movably connected to both sides of its outer surface. A positioning plate 13 is fixedly connected to the rear side of the inner surface of the U-shaped frame 12. The lower surfaces of the U-shaped frame 12 and the positioning plate 13 are fixedly connected to the upper surface of the mounting plate 1. A drive motor 14 is fixedly installed on the rear surface of the positioning plate 13. A threaded rod 15 is fixedly sleeved at the other end of the output shaft of the drive motor 14. The front end of the threaded rod 15 passes through the positioning plate 13, the movable frame 2, and the U-shaped frame 12 in sequence and extends to the front surface of the U-shaped frame 12. The outer surface of the threaded rod 15 is threadedly sleeved with the inner surface of the movable frame 2. When the drive motor 14 starts running, the threaded rod 15 will start to rotate. At this time, the movable frame 2 will start to move back and forth under the thread of the threaded rod 15. The U-shaped frame 12 and the positioning plate 13 limit the overall movement range of the movable frame 2.

[0026] Hollow plates 16 are fixedly connected to both the front and rear sides of the lower surface of the mounting plate 1. There are two hollow plates 16. A rough block 19 is fixedly connected to the bottom of the inner surface between the two hollow plates 16. Movable blocks 17 are movably connected to the bottom of the inner surface of the two hollow plates 16. There are two movable blocks 17. Movable wheels 18 are movably installed on the lower surface of the two movable blocks 17. A connecting plate 20 located above the rough block 19 is fixedly connected to the top of the inner surface between the two movable blocks 17. The outer surface of the connecting plate 20 is movably connected to the inner surface of the two hollow plates 16, and the lower surface of the connecting plate 20 is movably connected to the upper surface of the rough block 19. The design of the hollow plates 16 allows the movable blocks 17 and the movable wheels 18 to be stored inside the hollow plates 16. The design of the connecting plate 20 allows the two movable blocks 17 to move upward together with the connecting plate 20. The lower surface of the rough block 19 is rough. When the rough block 19 contacts the ground, the entire mounting plate 1 will be fixed to the ground under the action of friction.

[0027] Vertical rods 21 are fixedly connected to both the left and right sides of the upper surface of the connecting plate 20. The top of the vertical rods 21 penetrates the mounting plate 1 and extends to the top of the mounting plate 1 and is fixedly connected to a connecting block 22. A cylinder 23 is fixedly connected to the outer surface of the connecting block 22. The design of the vertical rods 21 restricts the overall movement direction of the connecting plate 20, while the design of the connecting block 22 restricts the overall movement range of the connecting plate 20.

[0028] The mounting plate 1 has a second motor 24 fixedly installed on both the left and right sides of its upper surface. The other end of the output shaft of the second motor 24 is fixedly sleeved with a rotating shaft 25. The outer surface of the rotating shaft 25 is fixedly sleeved with a driving rod 26. The inner surface of the driving rod 26 is movably connected to the outer surface of the cylinder 23. When the second motor 24 starts running, the rotating shaft 25 and the driving rod 26 will start to rotate. At this time, the driving rod 26 will drive the cylinder 23 during the rotation, thereby causing the cylinder 23, the connecting block 22, the vertical rod 21, the connecting plate 20 and the moving block 17 to move upward as a whole.

[0029] Working principle and usage process of this utility model:

[0030] When the operator needs to inspect a high part of the wall, the operator first pushes the mounting plate 1 so that the two movable wheels 27 contact the wall. Then the operator starts the second motor 24. As the second motor 24 runs, the rotating shaft 25 and the driving rod 26 will start to rotate. At this time, the cylinder 23, the connecting block 22 and the moving block 17 will start to move upward. Finally, the moving block 17 and the moving wheel 18 will enter the interior of the hollow plate 16. At this time, the rough block 19 will contact the ground, thereby fixing the mounting plate 1 to the ground.

[0031] Then the operator starts motor 5. As motor 5 runs, the circular shaft 6 and the drive rod 7 begin to rotate. The rotation of the drive rod 7 drives the driven rod 8, causing the driven rod 8 to rotate as well. At the same time, the other end of the driven rod 8 drives the movable plate 3, causing the movable plate 3 to move upward under the restriction of the movable frame 2 and the vertical limit bar 11 until the rebound hammer 4 is aligned with the detection area. At this time, the operator starts the drive motor 14. As the drive motor 14 runs, the threaded rod 15 begins to rotate. The movable frame 2 will then move backward under the drive of the threaded rod 15. When the movable frame 2 contacts the positioning plate 13, the rebound head of the rebound hammer 4 will enter the interior of the rebound hammer 4, thus completing the single rebound strength test of the wall detection area.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete rebound compressive strength testing device, comprising a mounting plate (1), characterized in that: The upper surface of the mounting plate (1) is movably connected to a movable frame (2), the inner surface of the movable frame (2) is movably connected to a movable plate (3), a rebound spring (4) is movably installed on the rear side of the upper surface of the movable plate (3), a first motor (5) is fixedly installed on the upper surface of the movable frame (2), a round shaft (6) is fixedly sleeved on the other end of the output shaft of the first motor (5), an active rod (7) is hinged to the outer surface of the round shaft (6), a driven rod (8) is hinged to the other end of the active rod (7), and the other end of the driven rod (8) is hinged to the front surface of the movable plate (3).

2. The concrete rebound compressive strength testing device according to claim 1, characterized in that: The upper surface of the rebounder (4) is movably connected to a pressure block (9). Bolts (10) are movably sleeved on both the left and right sides of the upper surface of the pressure block (9). The bottom end of the bolt (10) passes through the pressure block (9) and the movable plate (3) in sequence and extends into the interior of the movable plate (3). The outer surface of the bolt (10) and the inner surface of the movable plate (3) are threaded together.

3. The concrete rebound compressive strength testing device according to claim 1, characterized in that: Vertical limiting strips (11) are fixedly connected to the left and right sides of the bottom of the inner surface of the movable frame (2). The top of the vertical limiting strip (11) passes through the movable plate (3) and extends to the top of the inner surface of the movable frame (2). The outer surface of the vertical limiting strip (11) and the outer surface of the movable plate (3) are movably connected. Movable wheels (27) are movably installed on the left and right sides of the rear surface of the mounting plate (1).

4. The concrete rebound compressive strength testing device according to claim 1, characterized in that: The movable frame (2) has U-shaped frames (12) movably connected to both sides of its outer surface. A positioning plate (13) is fixedly connected to the rear side of the inner surface of the U-shaped frame (12). The lower surfaces of the U-shaped frame (12) and the positioning plate (13) are fixedly connected to the upper surface of the mounting plate (1). A drive motor (14) is fixedly installed on the rear surface of the positioning plate (13). A threaded rod (15) is fixedly sleeved at the other end of the output shaft of the drive motor (14). The front end of the threaded rod (15) passes through the positioning plate (13), the movable frame (2), and the U-shaped frame (12) in sequence and extends to the front surface of the U-shaped frame (12). The outer surface of the threaded rod (15) is threadedly sleeved with the inner surface of the movable frame (2).

5. The concrete rebound compressive strength testing device according to claim 1, characterized in that: Hollow plates (16) are fixedly connected to both the front and rear sides of the lower surface of the mounting plate (1). There are two hollow plates (16). A rough block (19) is fixedly connected to the bottom of the inner surface between the two hollow plates (16). A movable block (17) is movably connected to the bottom of the inner surface of the two hollow plates (16). There are two movable blocks (17). A movable wheel (18) is movably installed on the lower surface of the two movable blocks (17). A connecting plate (20) located above the rough block (19) is fixedly connected to the top of the inner surface between the two movable blocks (17). The outer surface of the connecting plate (20) is movably connected to the inner surface of the two hollow plates (16). The lower surface of the connecting plate (20) is movably connected to the upper surface of the rough block (19).

6. The concrete rebound compressive strength testing device according to claim 5, characterized in that: Vertical rods (21) are fixedly connected to both the left and right sides of the upper surface of the connecting plate (20). The top of the vertical rod (21) passes through the mounting plate (1) and extends to the top of the mounting plate (1) and is fixedly connected to a connecting block (22). A cylinder (23) is fixedly connected to the outer surface of the connecting block (22).

7. The concrete rebound compressive strength testing device according to claim 1, characterized in that: The mounting plate (1) has two motors (24) fixedly installed on the left and right sides of its upper surface. The other end of the output shaft of the motor (24) is fixedly sleeved with a rotating shaft (25). The outer surface of the rotating shaft (25) is fixedly sleeved with a driving rod (26). The inner surface of the driving rod (26) is movably connected to the outer surface of the cylinder (23).

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