Concrete hardness detection device for building construction
The concrete hardness testing device, driven by a servo motor and an electric telescopic rod, automatically controls the Mohs hardness pen to scratch the concrete surface, solving the problem of inaccurate manual force control and improving testing accuracy and consistency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING SHUZHE CONSTR ENG CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-28
AI Technical Summary
In existing technologies, it is difficult to control the force when manually holding the pen, resulting in low accuracy when using a Mohs hardness tester to detect the hardness of concrete.
A concrete hardness testing device for building construction was designed. It uses a servo motor and an electric telescopic rod to drive the Mohs hardness pen to move forward automatically, and the force applied when the pen moves is controlled by a counterweight ring on the threaded rod.
It enables the Mohs hardness pen to automatically move across the concrete surface, improving detection accuracy and ensuring the uniformity and consistency of the detection force.
Smart Images
Figure CN224176310U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction, specifically to a concrete hardness testing device for building construction. Background Technology
[0002] In the construction process, a large amount of concrete is often used to improve the stability of the building. During the use of concrete, its hardness needs to be tested to ensure that the building meets standards. The Mohs hardness value of concrete is one of the important indicators for measuring its compressive strength. The Mohs hardness of concrete directly affects its service life and safety performance.
[0003] The Mohs hardness test method for concrete involves scratching the concrete surface with a Mohs hardness pen at an angle of 45°-75°. If obvious scratches are left on the concrete surface, it indicates that the concrete is unqualified. However, when testing the hardness of concrete with a Mohs hardness pen, it is currently difficult to control the force when holding the pen manually. The pressure applied during the scratching process cannot be kept constant, which directly affects the accuracy of the test.
[0004] Therefore, this utility model designs a concrete hardness testing device for building construction to solve the above-mentioned problems. Utility Model Content
[0005] To address the aforementioned problems, this utility model provides a concrete hardness testing device for building construction.
[0006] This utility model is achieved through the following technical solution:
[0007] A concrete hardness testing device for building construction includes a mounting plate. Support plates are fixed at the four corners of the bottom surface of the mounting plate. A servo motor is fixedly mounted on the side wall of each support plate. The output shaft of the servo motor penetrates the support plate and is fixed with a roller. A mounting groove is formed at the center of the top surface of the mounting plate. An n-shaped plate is placed in the mounting groove. Sliding grooves are formed on the inner walls of both sides of the mounting groove. Sliding blocks are movably mounted in the two sliding grooves and fixedly connected to the two sides of the n-shaped plate. A rotating shaft is fixed between the inner walls of the two sides of the n-shaped plate. A rotating cylinder is fitted onto the rotating shaft and rotatably connected to the rotating shaft. A swing plate is fixed to one side of the rotating cylinder. A positioning cylinder is fixed at the center of the top of the swing plate. A Mohs hardness pen is inserted into the positioning cylinder. The bottom end of the Mohs hardness pen penetrates the swing plate and is slidably connected to it. The swing plate has a through hole for the Mohs hardness pen to pass through. A locking bolt is screwed onto the positioning cylinder. A limit plate is fixed to one side of the swing plate. L-shaped limit plates are fixed to the bottom ends of the two side plates of the n-shaped plate. A vertical plate is fixed to one side of the bottom surface of the mounting plate. An electric telescopic rod is fixedly installed on the side wall of the vertical plate. The telescopic end of the electric telescopic rod penetrates the vertical plate and is fixed to a U-shaped plate. A push-pull rod is fixed between the two side plates of the U-shaped plate. The push-pull rod is located between the vertical plate and the limit plate of the L-shaped limit plate. A control switch is fixed to the bottom end of the limit plate. The control switch is electrically connected to a servo motor through a wire.
[0008] Preferably, a first guide rod is symmetrically provided through the vertical plate, the first guide rod is slidably connected to the vertical plate, and one end of the first guide rod is fixedly connected to the side wall of the U-shaped plate.
[0009] Preferably, a threaded rod is fixed on the side wall of the swing plate, a locking nut is screwed onto the threaded rod, and a counterweight ring is sleeved on the threaded rod between the locking nut and the swing plate.
[0010] Preferably, a storage battery is fixedly installed on one side of the top surface of the mounting plate, and the electric telescopic rod, servo motor and control switch are electrically connected to the storage battery through wires.
[0011] Compared with existing technologies, the beneficial effects of this utility model are:
[0012] In use, the Mohs hardness pen is inserted into the perforation on the swing plate, with the pen tip at a 45°-75° angle to the concrete surface. The locking bolt on the positioning cylinder is then tightened to secure the pen. The electric telescopic rod is then activated, and its telescopic end reciprocates. During this process, the device can automatically move the Mohs hardness pen forward and detect the hardness of the concrete surface. Furthermore, by adding or removing the counterweight ring on the threaded rod, the force exerted by the Mohs hardness pen during its movement can be effectively and flexibly controlled. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure described in this utility model;
[0014] Figure 2 This is a schematic diagram of the structure described in this utility model. Figure 1 ;
[0015] Figure 3 This is a front view of the structure described in this utility model;
[0016] Figure 4 The structure described in this utility model Figure 3 A sectional view.
[0017] In the diagram: 1. Mounting plate; 2. Support plate; 3. Servo motor; 4. Roller; 5. Battery; 6. Mounting groove; 7. N-shaped plate; 8. First guide rod; 9. Slide groove; 10. Slider; 11. Rotating shaft; 12. Rotating cylinder; 13. Swing plate; 14. Positioning cylinder; 15. Mohs hardness tester; 16. L-shaped limit plate; 17. Threaded rod; 18. Locking nut; 19. Counterweight ring; 20. Limit plate; 21. Control switch; 22. Vertical plate; 23. Electric telescopic rod; 24. U-shaped plate; 25. Push-pull rod; 26. First guide rod; 27. Slide groove; 28. Slider. Detailed Implementation
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:
[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a concrete hardness testing device for building construction includes a mounting plate 1. Support plates 2 are fixed at the four corners of the bottom surface of the mounting plate 1. A servo motor 3 is fixedly mounted on the side wall of each support plate 2. The output shaft of the servo motor 3 penetrates the support plate 2 and is fixed with a roller 4. A mounting groove 6 is formed at the center of the top surface of the mounting plate 1. An n-shaped plate 7 is placed inside the mounting groove 6. Sliding grooves 9 are formed on the inner walls of both sides of the mounting groove 6. Sliding blocks 10 are movably mounted in the two sliding grooves 9. The two sliding blocks 10 are fixedly connected to the two sides of the n-shaped plate 7. A rotating shaft 11 is fixed between the inner walls of the two sides of the n-shaped plate 7. A rotating cylinder 12 is fitted onto the rotating shaft 11 and is rotatably connected to the rotating shaft 11. A swing plate 13 is fixed to one side of the rotating cylinder 12. A positioning cylinder 14 is fixed at the center of the top of the swing plate 13. A Mohs hardness pen 15 is inserted, the bottom end of which penetrates the swing plate 13 and is slidably connected to it. The swing plate 13 has a through hole for the Mohs hardness pen 15 to pass through. A locking bolt is screwed onto the positioning cylinder 14. A limit plate 20 is fixed to one side of the swing plate 13. L-shaped limit plates 16 are fixed to the bottom ends of the two side plates of the n-shaped plate 7. A vertical plate 22 is fixed to one side of the bottom surface of the mounting plate 1. An electric telescopic rod 23 is fixedly installed on the side wall of the vertical plate 22. The telescopic end of the electric telescopic rod 23 penetrates the vertical plate 22 and is fixed to a U-shaped plate 24. A push-pull rod 25 is fixed between the two side plates of the U-shaped plate 24. The push-pull rod 25 is located between the vertical plate of the L-shaped limit plate 16 and the limit plate 20. A control switch 21 is fixed to the bottom end of the limit plate 20. The control switch 21 is electrically connected to the servo motor 3 through a wire.
[0020] The vertical plate 22 is symmetrically provided with first guide rods 8, which are slidably connected to the vertical plate 22. One end of the first guide rod 8 is fixedly connected to the side wall of the U-shaped plate 24.
[0021] A threaded rod 17 is fixed on the side wall of the swing plate 13, and a locking nut 18 is screwed onto the threaded rod 17. A counterweight ring 19 is sleeved on the threaded rod 17 between the locking nut 18 and the swing plate 13.
[0022] A storage battery 5 is fixedly installed on one side of the top surface of the mounting plate 1. The electric telescopic rod 23, the servo motor 3 and the control switch 21 are electrically connected to the storage battery 5 through wires.
[0023] Working principle;
[0024] In use, the Mohs hardness pen 15 is inserted into the perforation on the swing plate 13, with the pen tip at a 45°-75° angle to the concrete surface. The locking bolts on the positioning cylinder 14 are then tightened to secure the pen. The electric telescopic rod 23 is then activated, causing its telescopic end to reciprocate. When the telescopic end retracts, the push-pull rod 25 pulls the n-shaped plate 7 and the swing plate 13 towards the vertical plate 22 via the L-shaped limiting plate 16. During this process, the pen tip of the Mohs hardness pen 15 moves across the concrete surface under the natural downward force of the swing plate 13. When the telescopic end of the electric telescopic rod 23 extends, the push-pull rod 25 first pushes the side wall of the swing plate 13, causing the bottom of the swing plate 13 to... The device swings clockwise, at which point the tip of the Mohs hardness pen 15 separates from the concrete surface. As the telescopic end of the electric telescopic rod 23 continues to extend, the push-pull rod 25 contacts the limit plate 20 and presses the button on the control switch 21. When the push-pull rod 25 contacts the limit plate 20, it pushes the swing plate 13 to move in the opposite direction through the limit plate 20. Simultaneously, after the push-pull rod 25 presses the button on the control switch 21, the four servo motors 3 run synchronously, driving the roller 4 to roll a distance of 1-10cm. Thus, when the telescopic end of the electric telescopic rod 23 retracts next time, the tip of the Mohs hardness pen 15 will scratch the concrete surface after the device has advanced 1-10cm, thus enabling the device to automatically detect the hardness of the concrete surface while moving forward. By adding or removing the counterweight ring 19 on the threaded rod 17, the force applied when the Mohs hardness pen 15 scratches can be effectively controlled.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A concrete hardness testing device for building construction, comprising a mounting plate (1), characterized in that; Support plates (2) are fixed at the four corners of the bottom surface of the mounting plate (1). A servo motor (3) is fixedly installed on the side wall of each support plate (2). The output shaft of the servo motor (3) penetrates the support plate (2) and is fixed with a roller (4). A mounting groove (6) is opened in the center of the top surface of the mounting plate (1). An n-shaped plate (7) is provided in the mounting groove (6). Sliding grooves (9) are opened on the inner walls of both sides of the mounting groove (6). A sliding plate (9) is provided in each of the two sliding grooves (9). Two sliders (10) are fixedly connected to the two sides of an n-shaped plate (7). A rotating shaft (11) is fixed between the inner walls of the two sides of the n-shaped plate (7). A rotating cylinder (12) is fitted on the rotating shaft (11). The rotating cylinder (12) is rotatably connected to the rotating shaft (11). A swing plate (13) is fixed on one side of the rotating cylinder (12). A positioning cylinder (14) is fixed at the center of the top of the swing plate (13). A Mohs hardness pen (15) is inserted into the positioning cylinder (14). The bottom end of the Mohs hardness pen (15) penetrates the swing plate (13) and is slidably connected to it. The swing plate (13) has a through hole for the Mohs hardness pen (15) to pass through. The positioning cylinder (14) is screwed with a locking bolt. A limit plate (20) is fixed on one side of the swing plate (13). The bottom ends of the two side plates of the n-shaped plate (7) are respectively fixed with L-shaped limit plates (16). A vertical plate (22) is fixed on one side of the bottom surface of the mounting plate (1). The side wall of the vertical plate (22) An electric telescopic rod (23) is fixedly installed on the top. The telescopic end of the electric telescopic rod (23) penetrates the vertical plate (22) and is fixed with a U-shaped plate (24). A push-pull rod (25) is fixed between the two side plates of the U-shaped plate (24). The push-pull rod (25) is set between the vertical plate of the L-shaped limiting plate (16) and the limiting plate (20). A control switch (21) is fixed at the bottom of the limiting plate (20). The control switch (21) is electrically connected to the servo motor (3) through a wire.
2. The concrete hardness testing device for building construction according to claim 1, characterized in that: The vertical plate (22) is symmetrically provided with first guide rods (8) running through it. The first guide rods (8) are slidably connected to the vertical plate (22), and one end of the first guide rods (8) is fixedly connected to the side wall of the U-shaped plate (24).
3. The concrete hardness testing device for building construction according to claim 1, characterized in that: A threaded rod (17) is fixed on the side wall of the swing plate (13), and a locking nut (18) is screwed onto the threaded rod (17). A counterweight ring (19) is sleeved on the threaded rod (17) between the locking nut (18) and the swing plate (13).
4. The concrete hardness testing device for building construction according to claim 1, characterized in that: A battery (5) is fixedly installed on one side of the top surface of the mounting plate (1). The electric telescopic rod (23), servo motor (3) and control switch (21) are electrically connected to the battery (5) through wires.