A concrete strength testing device for highway bridge construction

Abstract

This utility model belongs to the field of concrete strength testing technology, and in particular to a concrete strength testing device for highway bridge construction. It includes a rebound hammer and a support mechanism located outside the rebound hammer, with a replacement mechanism at its bottom. The support mechanism includes a support block fixedly connected to the outer wall of the rebound hammer. In this utility model, the support mechanism automatically triggers the linkage movement of the swing arm and compresses the spring when the roller contacts the concrete surface in advance. This process not only effectively absorbs the impact and vibration during operation but also actively and reliably presses the bottom of the rebound hammer stably and vertically against the concrete surface to be tested. This fundamentally solves the problem of instrument shaking and tilting caused by manual suspension, ensuring that the impact hammer always maintains an ideal vertical impact posture, thereby significantly reducing systematic measurement errors and significantly improving the accuracy, reliability, and overall efficiency of concrete strength rebound value testing.

Description

Technical Field

[0001] This utility model belongs to the field of concrete strength testing technology, specifically relating to a concrete strength testing device for highway bridge construction. Background Technology

[0002] Highway bridges are permanent structures designed specifically for the passage of automobiles and other road vehicles. Their main function is to cross natural obstacles (such as rivers, lakes, valleys, and straits) or man-made obstacles (such as other roads, railways, and pipelines) to ensure the continuity and traffic capacity of highway routes. They typically consist of a superstructure (the parts that directly bear vehicles, such as the bridge deck, main beams, or arches), a substructure (piers and abutments that support the superstructure and transfer their loads to the ground), and a foundation (a structure buried deep underground that safely distributes the loads to the soil).

[0003] During the construction of highway bridges, it is necessary to inspect and test the strength of concrete, which is usually done using a rebound hammer. However, when using existing handheld rebound hammers to test vertical or inclined surfaces such as bridge beams and piers, operators need to hold the instrument in mid-air. Due to the lack of a rigid support structure, manual force can easily cause the instrument to shake or tilt, making it impossible for the impact hammer to maintain a vertical impact on the concrete surface. This leads to systematic deviations in the rebound value measurement, affecting the accuracy and efficiency of the test.

[0004] To address the aforementioned issues, this application proposes a concrete strength testing device for highway bridge construction. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a concrete strength testing device for highway bridge construction, which features stable testing capabilities.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a concrete strength testing device for highway bridge construction, including a rebound hammer, and further including a support mechanism, wherein the support mechanism is disposed outside the rebound hammer, and a replacement mechanism is provided at the bottom of the support mechanism; The supporting structure includes: A support block is fixedly connected to the outer wall of the rebound hammer. A rectangular box is fixedly connected to the side of the support block away from the rebound hammer. A spring is fixedly connected to the inner wall of the rectangular box. A rectangular block is fixedly connected to the end of the spring away from the rectangular box. A connecting shaft is fixedly connected to the front of the rectangular block. A push shaft is fixedly connected to the front end of the connecting shaft. A support base is fixedly connected to the outer wall of the rebound hammer. A swing arm is provided on the inner side of the support base. A roller is provided at the bottom of the replacement mechanism.

[0007] Preferably, a short shaft is fixedly connected to the inner side of the support base, and the swing arm is rotatably connected to the outer wall of the short shaft, so that the support base can make circular motion along the axis of the short shaft.

[0008] Preferably, the swing arm has a slot inside, and the push shaft is movably connected to the inner wall of the slot, so that the swing arm can drive the push shaft to move through the slot.

[0009] Preferably, the rectangular box has a rectangular opening on the front, and the connecting shaft passes through the rectangular opening and moves, so that the push shaft can drive the connecting shaft to move along the rectangular opening.

[0010] Preferably, the replacement mechanism includes a fixing groove, which is opened at the bottom of the swing arm. A protrusion is slidably connected to the inner wall of the support block. A bolt is provided inside the protrusion. A nut is threadedly connected to the outer wall of the bolt. A fixing block is fixedly connected to the bottom of the protrusion. When the roller is worn, the roller can be disassembled and replaced.

[0011] Preferably, through holes are provided inside the protrusion and on both sides of the fixing groove, and the bolt passes through the through holes to facilitate limiting the position of the protrusion through the through holes.

[0012] Preferably, the fixed block has a rotating hole inside, the roller is rotatably connected to the inner wall of the rotating hole, and the rectangular block is slidably connected to the inner wall of the rectangular box to provide stable support for the rectangular block and the roller.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the support mechanism automatically triggers the swing arm's linkage movement and compresses the spring when the roller contacts the concrete surface in advance. This process not only effectively absorbs the impact and vibration during operation but also actively and reliably presses the bottom of the rebound hammer stably and vertically against the concrete surface to be tested. This fundamentally solves the problem of instrument shaking and tilting caused by manual suspension, ensuring that the impact hammer always maintains an ideal vertical impact posture, thereby significantly reducing systematic measurement errors and significantly improving the accuracy, reliability, and overall efficiency of concrete strength rebound value detection.

[0014] 2. In this utility model, through the designed replacement mechanism, when the roller wears out due to prolonged use, the operator only needs to unscrew the nut and pull out the bolt to easily release the limiting position on the protrusion, and then directly pull the roller assembly (along with the fixing block) out of the fixing groove at the bottom of the swing arm. This modular design makes the roller disassembly and assembly process extremely simple and quick, without the need for complex tools or disassembly of other major components, significantly shortening maintenance time, reducing replacement difficulty and cost, and effectively ensuring the continuous availability of the equipment. It is particularly suitable for rapid maintenance at construction and testing sites.

[0015] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of the structure of this utility model; Figure 2 This is a sectional view of the rear of a rectangular box. Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the structure at the roller. Figure 6 A schematic diagram of the structure at the drive shaft.

[0017] In the diagram: 1. Rebound spring; 2. Support mechanism; 21. Support block; 22. Rectangular box; 23. Spring; 24. Rectangular block; 25. Connecting shaft; 26. Push shaft; 27. Swing arm; 28. Support seat; 29. ​​Roller; 3. Replacement mechanism; 31. Fixing groove; 32. Protrusion; 33. Bolt; 34. Nut; 35. Fixing block. Detailed Implementation

[0018] 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.

[0019] Example

[0020] Please see Figures 1-6 The present invention provides the following technical solution: a concrete strength testing device for highway bridge construction, including a rebound hammer 1, and further including a support mechanism 2. The support mechanism 2 is disposed on the outside of the rebound hammer 1, and a replacement mechanism 3 is disposed at the bottom of the support mechanism 2. Through the modular design of the support mechanism 2 and the replacement mechanism 3, the rigid support requirements of the rebound hammer 1 are guaranteed, and a solution for quick replacement of the vulnerable roller is provided, which significantly improves the applicability and maintenance efficiency of the equipment. Supporting mechanism 2 includes: Support block 21 is fixedly connected to the outer wall of rebound hammer 1. A rectangular box 22 is fixedly connected to the side of support block 21 away from rebound hammer 1. A spring 23 is fixedly connected to the inner wall of rectangular box 22. A rectangular block 24 is fixedly connected to the end of spring 23 away from rectangular box 22. A connecting shaft 25 is fixedly connected to the front of rectangular block 24. A push shaft 26 is fixedly connected to the front end of connecting shaft 25. A support base 28 is fixedly connected to the outer wall of rebound hammer 1. A swing arm 27 is provided on the inner side of support base 28. A roller 29 is provided at the bottom of replacement mechanism 3. Support block 21 and rectangular box 22 form a stable base. Combined with the buffering effect of spring 23, the contact pressure between rebound hammer and concrete surface can be adaptively adjusted. Roller 29 first contacts the surface to be tested, triggering the swing arm linkage mechanism to ensure vertical pressure at the testing end and eliminate shaking caused by manual holding.

[0021] Furthermore, a short shaft is fixedly connected to the inner side of the support base 28, and the swing arm 27 is rotatably connected to the outer wall of the short shaft. The swing arm 27 supported by the short shaft can be flexibly extended in a circular motion, automatically adapting to concrete surfaces with different inclination angles, avoiding instrument deviation caused by rigid collisions, and ensuring the vertical incident posture of the impact hammer.

[0022] Furthermore, a slot is provided inside the swing arm 27, and the push shaft 26 is movably connected to the inner wall of the slot, allowing the swing arm to... The rotational motion is converted into linear displacement of the drive shaft 26, and the pressure is precisely transmitted to the spring 23 through mechanical linkage, so as to achieve stable dynamic buffering and automatic reset function.

[0023] Furthermore, the rectangular box 22 has a rectangular opening on the front, through which the connecting shaft 25 passes and moves. The rectangular opening provides a directional movement track for the connecting shaft 25, ensuring that the force direction of the pushing shaft 26 is consistent with the spring compression axis, preventing the mechanism from jamming and improving the reliability of the operation.

[0024] Furthermore, the replacement mechanism 3 includes a fixing groove 31, which is located at the bottom of the swing arm 27. A protrusion 32 is slidably connected to the inner wall of the support block 21. A bolt 33 is installed inside the protrusion 32, and a nut 34 is threadedly connected to the outer wall of the bolt 33. A fixing block 35 is fixedly connected to the bottom of the protrusion 32. The sliding fit structure between the protrusion 32 and the fixing groove 31, combined with the locking method of the bolt 33 and the nut 34, enables the modular disassembly and assembly of the roller 29. Replacement can be completed without special tools, greatly reducing the difficulty of on-site maintenance.

[0025] Furthermore, through holes are provided inside the protrusion 32 and on both sides of the fixing groove 31. The bolt 33 passes through the through holes. The through hole alignment design ensures that the bolt 33 can accurately pass through the protrusion 32 and the fixing groove 31, forming a rigid constraint to prevent the roller 29 from loosening or falling off during inspection, and to ensure the stability of the support.

[0026] Furthermore, the fixed block 35 has a rotating hole inside, the roller 29 is rotatably connected to the inner wall of the rotating hole, and the rectangular block 24 is slidably connected to the inner wall of the rectangular box 22. The rotating hole allows the roller 29 to rotate freely to fit the concrete surface and reduce frictional resistance. The sliding fit between the rectangular block 24 and the rectangular box 22 ensures that there is no off-center load during the compression process of the spring 23, maintaining the linearity and durability of the mechanism's movement.

[0027] Components not described in detail in this article are existing technologies.

[0028] The working principle and usage process of this utility model are as follows: First, the bottom end of the rebound hammer 1 is aligned with the concrete wall or ground of the highway bridge construction to achieve the purpose of strength testing. When the bottom end of the rebound hammer 1 is aligned with the concrete wall, the roller 29 will contact the concrete wall in advance. Since the swing arm 27 is inclined, the rollers 29 at the bottom of the three swing arms 27 will contact the surface to be tested almost simultaneously. If the surface to be tested is slightly uneven or tilted, a certain roller 29 will be subjected to force first, pushing its corresponding swing arm 27 to rotate around the short axis in the support seat 28. When the swing arm 27 moves, it can push the push shaft 26 to move under the action of the slot. The push shaft 26 can drive the rectangular block 24 to move through the connecting shaft 25 to compress the spring 23. Thus, during the inspection process, the stability of the rebound hammer 1 and the stability of the concrete surface inspection can be guaranteed. At the same time, the spring 23 in the compressed state can further achieve the purpose of reset.

[0029] Rotate nut 34 to unscrew it from the outer wall of bolt 33, then pull bolt 33 out from inside protrusion 32 to remove the limiting effect on protrusion 32. Then, protrusion 32 can be pulled out from the inner wall of fixing groove 31 by roller 29 and fixing block 35, thus realizing the disassembly of roller 29. During long-term use, when roller 29 wears out, it is convenient to further disassemble and replace roller 29, achieving good disassembly and assembly efficiency.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A concrete strength testing device for highway bridge construction, comprising a rebound hammer (1), characterized in that, Also includes: Support mechanism (2), the support mechanism (2) is located outside the rebounder (1), and a replacement mechanism (3) is provided at the bottom of the support mechanism (2); The support mechanism (2) includes: Support block (21), the support block (21) is fixedly connected to the outer wall of rebounder (1), a rectangular box (22) is fixedly connected to the side of the support block (21) away from rebounder (1), a spring (23) is fixedly connected to the inner wall of the rectangular box (22), a rectangular block (24) is fixedly connected to the end of the spring (23) away from the rectangular box (22), a connecting shaft (25) is fixedly connected to the front of the rectangular block (24), a push shaft (26) is fixedly connected to the front end of the connecting shaft (25), a support seat (28) is fixedly connected to the outer wall of rebounder (1), a swing arm (27) is provided on the inner side of the support seat (28), and a roller (29) is provided at the bottom of the replacement mechanism (3).

2. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The support base (28) is fixedly connected to a short shaft on its inner side, and the swing arm (27) is rotatably connected to the outer wall of the short shaft.

3. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The swing arm (27) has a slot inside, and the push shaft (26) is movably connected to the inner wall of the slot.

4. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The rectangular box (22) has a rectangular opening on the front, and the connecting shaft (25) passes through the rectangular opening and moves.

5. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The replacement mechanism (3) includes a fixing groove (31), which is located at the bottom of the swing arm (27). A protrusion (32) is slidably connected to the inner wall of the support block (21). A bolt (33) is provided inside the protrusion (32). A nut (34) is threadedly connected to the outer wall of the bolt (33). A fixing block (35) is fixedly connected to the bottom of the protrusion (32).

6. The concrete strength testing device for highway bridge construction according to claim 5, characterized in that, The protrusion (32) has through holes inside and on both sides of the fixing groove (31), and the bolt (33) passes through the through holes.

7. The concrete strength testing device for highway bridge construction according to claim 5, characterized in that, The fixed block (35) has a rotating hole inside, the roller (29) is rotatably connected to the inner wall of the rotating hole, and the rectangular block (24) is slidably connected to the inner wall of the rectangular box (22).

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