Concrete rebound apparatus for detecting main body structure

Abstract

The utility model relates to a concrete rebound apparatus for detecting a main body structure. The concrete rebound apparatus comprises a rebound apparatus body, a frame body and a positioning assembly, the rebound apparatus body comprises a rebound apparatus shell and a striking rod, a first connecting ring fixedly sleeves the outer side, close to the rear end of the rebound apparatus shell, of the rebound apparatus shell, and a push rod is arranged at the rear end of the rebound apparatus shell. The frame body comprises a first frame, a second frame and connecting rods, the first frame and the second frame are arranged on the front side and the rear side of the rebound apparatus shell respectively, and the connecting rods are fixed between the first frame and the second frame. The positioning assembly comprises a second connecting ring, guide rods and positioning supporting legs, the front end of the rebound apparatus shell slidably penetrates through the second connecting ring, the at least two guide rods are fixed to the front end face of the first connecting ring and slidably penetrate through the second connecting ring, the three positioning supporting legs are triangularly distributed and fixed to the front end face of the first frame, and the guide rods are parallel to the central axis of the elastic striking rod. The same plane where the end points of the three positioning supporting feet are located is perpendicular to the central axis of the elastic striking rod.

Description

Technical Field

[0001] This utility model relates to the field of concrete strength testing technology, and more specifically, to a concrete rebound hammer for testing main structures. Background Technology

[0002] A concrete rebound hammer is a testing device used to detect the strength of concrete. Its principle is based on a spring-driven hammer that strikes the concrete within the measurement area. The concrete deforms, consuming energy, and the distance the hammer rebounds represents this energy loss. Different strengths of concrete produce different amounts of deformation upon impact, resulting in different energy consumption and rebound distances, thus achieving the function of strength measurement.

[0003] Traditional concrete rebound hammers rely on manual control of the hammer's impact direction during use, which cannot guarantee the perpendicularity between the impact rod and the measuring surface, easily leading to inaccurate measurement results. Patent application CN119198409A discloses a concrete rebound hammer for supervisory purposes, comprising a rebound hammer body, a positioning frame, and positioning feet. The rebound hammer body has a shell, within which is a central guide rod and an impact rod fitted onto the central guide rod. The positioning frame includes a horizontal positioning component located inside the frame, comprising a limiting ring whose inner diameter matches the outer diameter of the rebound hammer body. The limiting ring is coaxially arranged with the rebound hammer body and fitted around its outer periphery, with the rebound hammer body horizontally guided and mounted on the limiting ring. The positioning feet are located outside the positioning frame and are used to contact the surface of the material being measured during use. This invention claims to solve the technical problem of rebound hammers failing to guarantee perpendicularity, leading to inaccurate measurement results.

[0004] However, since concrete is mainly made of sand, gravel, and cement, the surface of the concrete wall is uneven with many small protrusions. The existing technology disclosed above uses four positioning feet. Since three points determine a unique plane, four positioning feet on the concrete wall surface may result in only three positioning feet touching the surface of the concrete wall to be tested, while the other positioning foot is suspended in the air. This causes the concrete rebound hammer used by the supervisor to wobble easily and still cannot maintain verticality. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a concrete rebound hammer for main structure testing that can solve the above problems.

[0006] A concrete rebound hammer for main structure testing includes a rebound hammer body, a frame body, and a positioning component.

[0007] The rebounder body includes a rebounder housing and a striking rod. A first connecting ring is fixedly sleeved on the outer side of the rebounder housing near the rear end of the rebounder housing, and a push rod is provided at the rear end of the rebounder housing.

[0008] The frame includes a first frame, a second frame, and connecting rods. The first frame and the second frame are respectively disposed on the front and rear sides of the rebound device housing. A plurality of connecting rods are fixedly disposed between the first frame and the second frame, and the connecting rods are located outside the first connecting ring.

[0009] The positioning assembly includes a second connecting ring, guide rods, and positioning feet. The second connecting ring is fixedly disposed inside the plurality of connecting rods. The front end of the rebound device housing slides through the second connecting ring. At least two guide rods are fixed to the front end face of the first connecting ring. The second connecting ring has a through hole for the guide rods to pass through. The inner diameter of the through hole is adapted to the outer diameter of the guide rod. The three positioning feet are arranged in a triangle and fixed to the front end face of the first frame. The guide rods are parallel to the central axis of the impact rod. The same plane containing the endpoints of the three positioning feet is perpendicular to the central axis of the impact rod.

[0010] Furthermore, the push rod is coaxially arranged with the rebound device body, and a guide ring is fixed inside the second frame. The inner diameter of the guide ring is adapted to the outer diameter of the push rod, and the push rod slides through the guide ring.

[0011] Furthermore, a spring is sleeved on the guide rod, and the two ends of the spring are fixedly connected to the first connecting ring and the second connecting ring, respectively.

[0012] Furthermore, a mounting plate is fixed to the outer side of the first frame, and the mounting plate is provided with a first handle.

[0013] Furthermore, the mounting plate is perpendicular to the central axis of the spring rod, and the first handle is located on the rear side of the mounting plate away from the first frame, and the first handle is arranged horizontally.

[0014] Furthermore, a second handle is provided at the rear end of the push rod, and the second handle is arranged horizontally.

[0015] Furthermore, a measuring screen is provided on the outside of the rebound hammer housing, and the measuring screen faces the first handle.

[0016] Furthermore, both the first and second borders are equilateral triangular frame structures, and the connecting rods are located at the three vertices of the triangular structure.

[0017] Furthermore, it also includes a cleaning component, which includes a fixing ring, a cleaning ring, and bristles. The fixing ring is fixed to the inner side of the first frame and is coaxially arranged with the spring rod. The inner diameter of the fixing ring is larger than the outer diameter of the rebound device housing. The cleaning ring is detachably installed at the front end of the fixing ring, and the bristles are disposed on the inner wall of the cleaning ring.

[0018] Furthermore, the cleaning ring is threadedly connected to the fixing ring.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The concrete rebound hammer for main structure testing in this utility model has three positioning feet fixed on the front end face of the first frame. These three positioning feet are arranged in a triangle to determine a unique plane. By setting a first connecting ring, a second connecting ring, and a guide rod, with the guide rod parallel to the central axis of the impact rod, and the unique plane determined by the fixed points of the three positioning feet being perpendicular to the central axis of the impact rod, the three positioning feet are brought into contact with the surface of the concrete to be tested during use, thereby ensuring the verticality of the concrete rebound hammer during use. Attached Figure Description

[0021] 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:

[0022] Figure 1 This is a schematic diagram of the overall structure of the concrete rebound hammer used for main structure testing in Example 1.

[0023] Figure 2 This is a schematic diagram of the overall structure of the concrete rebound hammer used for main structure testing in Example 1 from a second perspective.

[0024] Figure 3 This is a schematic diagram of the overall structure of the concrete rebound hammer used for main structure testing in Example 1 from a third-view perspective.

[0025] Figure 4 This is a schematic diagram of the overall structure of the concrete rebound hammer used for main structure testing in Example 2.

[0026] Figure 5 This is a partial structural schematic diagram of the concrete rebound hammer used for main structure testing in Example 2.

[0027] Figure 6 This is a schematic diagram of the cleaning ring in Example 2.

[0028] In the diagram: 1. Rebound hammer housing; 2. Impact rod; 3. First connecting ring; 4. Push rod; 5. First frame; 6. Second frame; 7. Connecting rod; 8. Second connecting ring; 9. Guide rod; 10. Positioning support; 11. Guide ring; 12. Spring; 13. Mounting plate; 14. First handle; 15. Second handle; 16. Measuring screen; 17. Fixing ring; 18. Cleaning ring; 19. Brush bristles. Detailed Implementation

[0029] 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.

[0030] Example 1:

[0031] like Figure 1 As shown in the figure, the concrete rebound hammer used for main structure testing in this embodiment includes the rebound hammer body, frame body, and positioning components.

[0032] In this embodiment, the rebounder body includes a rebounder housing 1 and a striking rod 2. A first connecting ring 3 is fixedly sleeved on the outer side of the rebounder housing 1 near the rear end of the rebounder housing 1. A push rod 4 is provided at the rear end of the rebounder housing 1. The push rod 4 is coaxially arranged with the rebounder housing 1. A test screen is also provided on the outer side of the rebounder housing 1.

[0033] The frame includes a first frame 5, a second frame 6, and connecting rods 7. The first frame 5 and the second frame 6 are respectively located on the front and rear sides of the rebound spring housing 1. Several connecting rods 7 are fixedly arranged between the first frame 5 and the second frame 6, and the connecting rods 7 are located outside the first connecting ring 3. Specifically, in this embodiment, the first frame 5 and the second frame 6 are both in the form of an equilateral triangular frame structure. Three connecting rods 7 are provided, and the three connecting rods 7 are respectively located at the three vertices of the triangle. The two ends of the connecting rods 7 are fixedly connected to the first frame 5 and the second frame 6, respectively.

[0034] The positioning assembly includes a second connecting ring 8, guide rods 9, and positioning feet 10. The second connecting ring 8 is fixedly disposed inside the three connecting rods 7. The front end of the rebounder housing 1 slides through the second connecting ring 8. At least two guide rods 9 are fixed to the front end face of the first connecting ring 3. The second connecting ring 8 has a through hole for the guide rods 9 to pass through. The inner diameter of the through hole is adapted to the outer diameter of the guide rod 9. The guide rod 9 is parallel to the central axis of the impact rod 2. The three positioning feet 10 are fixed to the front end face of the first frame 5 in a triangular arrangement. The three positioning feet 10 are respectively disposed at the three vertices of the triangle. The same plane containing the endpoints of the front ends of the three positioning feet 10 is perpendicular to the central axis of the impact rod 2.

[0035] Preferably, a spring 12 is sleeved on the guide rod 9, and the two ends of the spring 12 are fixedly connected to the first connecting ring 3 and the second connecting ring 8, respectively. In this embodiment, three guide rods 9 are provided, and these three guide rods 9 are distributed in a ring array. A guide ring 11 is fixed inside the second frame 6. The inner diameter of the guide ring 11 is adapted to the outer diameter of the push rod 4, and the push rod 4 slides through the guide ring 11.

[0036] In this embodiment, a mounting plate 13 is fixed to the outer side of the first frame 5. The mounting plate 13 is perpendicular to the central axis of the spring rod 2. A first handle 14 is fixedly connected to the rear side of the mounting plate 13 away from the first frame 5. The first handle 14 is arranged horizontally. The measuring screen 16 is positioned facing the first handle 14. A second handle 15 is provided at the rear end of the push rod 4. The second handle 15 is also arranged horizontally.

[0037] In this embodiment, when using the concrete rebound hammer for main structure testing, the operator needs to hold the first handle 14 and apply a pushing force to the test concrete surface so that the end point of the front end of the positioning support 10 contacts the concrete surface. Then, the operator holds the second handle 15 with the other hand and applies a pushing force to the test concrete surface. By setting the first handle 14 and the second handle 15 horizontally, it is more in line with the operator's grip and force application.

[0038] By placing the test screen and the first handle 14 on the same side, it facilitates use by staff at high, medium, and low heights. Specifically, as... Figure 1 As shown, when the test height is above the staff's head, the test screen faces downwards, with the first handle 14 below the first frame 5, making it easy to look up and observe the test screen; as Figure 2 As shown, when the test height is appropriate, both the test screen and the first handle 14 are in front of the operator, and the test screen can be observed at eye level; as Figure 3 As shown, when the test height is low, the test screen faces upwards, and the first handle 14 is located above the first frame 5. This makes it easier for staff to hold the first handle 14 and also makes it easier for staff to look down and observe the test screen.

[0039] The other structures inside the rebounder housing 1 in this embodiment are all existing technologies and will not be described in detail here.

[0040] The working principle of the concrete rebound hammer used for main structure testing in this embodiment is as follows:

[0041] Three positioning feet 10 are fixed on the front end face of the first frame 5, and these three positioning feet 10 are distributed in a triangle to determine a unique plane. By setting a first connecting ring 3, a second connecting ring 8 and a guide rod 9, and the guide rod 9 being parallel to the central axis of the impact rod 2, and the unique plane determined by the fixed points of the three positioning feet 10 being perpendicular to the central axis of the impact rod 2, the three positioning feet 10 are brought into contact with the concrete surface to be tested during use, thereby ensuring the verticality of the concrete rebound hammer during use.

[0042] Example 2:

[0043] The concrete rebound hammer for main structure testing in this embodiment is a further improvement based on Embodiment 1. Since the impact rod 2 needs to be wiped clean after use before being retracted into the hammer housing, this embodiment also includes a cleaning component to facilitate cleaning of the impact rod 2. Specifically, as shown... Figure 4-6 As shown, the cleaning assembly includes a retaining ring 17, a cleaning ring 18, and bristles 19. The retaining ring 17 is fixed to the inner side of the first frame 5 and is coaxially arranged with the spring rod 2. The inner diameter of the retaining ring 17 is larger than the outer diameter of the rebound device housing. The cleaning ring 18 is detachably installed at the front end of the retaining ring 17, and the bristles 19 are disposed on the inner wall of the cleaning ring 18. Preferably, a third connecting ring is provided at the rear end of the cleaning ring 18, and the third connecting ring is threadedly connected to the inner side of the retaining ring 17.

[0044] 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 rebound hammer for main structure testing, characterized in that, include: The rebounder body includes a rebounder housing (1) and a striking rod (2). A first connecting ring (3) is fixedly sleeved on the outside of the rebounder housing (1) near the rear end of the rebounder housing (1). A push rod (4) is provided at the rear end of the rebounder housing (1). The frame body includes a first frame (5), a second frame (6) and connecting rods (7). The first frame (5) and the second frame (6) are respectively disposed on the front and rear sides of the rebound device housing (1). A plurality of connecting rods (7) are fixedly disposed between the first frame (5) and the second frame (6). The connecting rods (7) are located outside the first connecting ring (3). The positioning component includes a second connecting ring (8), a guide rod (9), and positioning feet (10). The second connecting ring (8) is fixedly disposed inside a plurality of the connecting rods (7). The front end of the rebound device housing (1) slides through the second connecting ring (8). At least two of the guide rods (9) are fixed to the front end face of the first connecting ring (3). The second connecting ring (8) has a through hole for the guide rods (9) to pass through. The inner diameter of the through hole is adapted to the outer diameter of the guide rods (9). The three positioning feet (10) are arranged in a triangle and fixed to the front end face of the first frame (5). The guide rods (9) are parallel to the central axis of the impact rod (2). The same plane where the endpoints of the three positioning feet (10) are located is perpendicular to the central axis of the impact rod (2).

2. The concrete rebound hammer for main structure testing according to claim 1, characterized in that, The push rod (4) is coaxially arranged with the rebound instrument body. A guide ring (11) is fixed inside the second frame (6). The inner diameter of the guide ring (11) is adapted to the outer diameter of the push rod (4). The push rod (4) slides through the guide ring (11).

3. The concrete rebound hammer for main structure testing according to claim 2, characterized in that, A spring (12) is fitted on the guide rod (9), and the two ends of the spring (12) are fixedly connected to the first connecting ring (3) and the second connecting ring (8) respectively.

4. The concrete rebound hammer for main structure testing according to claim 3, characterized in that, An mounting plate (13) is fixed to the outside of the first frame (5), and the mounting plate (13) is provided with a first handle (14).

5. The concrete rebound hammer for main structure testing according to claim 4, characterized in that, The mounting plate (13) is perpendicular to the central axis of the spring bar (2), and the first handle (14) is located on the rear side of the mounting plate (13) away from the first frame (5). The first handle (14) is arranged horizontally.

6. The concrete rebound hammer for main structure testing according to claim 5, characterized in that, The push rod (4) is provided with a second handle (15) at its rear end, and the second handle (15) is arranged horizontally.

7. The concrete rebound hammer for main structure testing according to claim 6, characterized in that, A measuring screen (16) is provided on the outside of the rebounder housing (1), and the measuring screen (16) faces the first handle (14).

8. The concrete rebound hammer for main structure testing according to claim 7, characterized in that, The first frame (5) and the second frame (6) are both equilateral triangular frame structures, and the three connecting rods (7) and positioning feet (10) are located at the three vertices of the triangular structure.

9. The concrete rebound hammer for main structure testing according to claim 8, characterized in that, It also includes a cleaning component, which includes a fixing ring (17), a cleaning ring (18), and bristles (19). The fixing ring (17) is fixed to the inner side of the first frame (5) and is coaxially arranged with the spring rod (2). The inner diameter of the fixing ring (17) is larger than the outer diameter of the rebound device housing. The cleaning ring (18) is detachably installed at the front end of the fixing ring (17). The bristles (19) are arranged on the inner wall of the cleaning ring (18).

10. The concrete rebound hammer for main structure testing according to claim 9, characterized in that, The cleaning ring (18) is threadedly connected to the fixing ring (17).

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