Highway bridge pavement strength detection device

Abstract

The utility model discloses a highway bridge pavement strength detection device, which comprises an outer frame, an inner frame and a rebound apparatus, the inner frame is connected with a limiting column, the limiting column is slidably connected with a connecting cover, the outer frame is rotatably connected with the limiting column, the rebound apparatus is rotatably connected with the connecting cover, and the outer side of the connecting cover is connected with a connecting rod used for assisting the rebound apparatus to press down. According to the auxiliary mechanism, one end of a limiting column is connected with a spring, the other end of the spring is connected to a connecting cover, the lower end of an outer frame is connected with a fixing rod, the lower end of an inner frame is rotationally connected with an overturning rod, and a containing groove is formed in the lower end of the outer frame. The sliding direction of the connecting cover is limited through the limiting column, the inner frame and the outer frame, it is ensured that the rebound instrument is always kept perpendicular to the road surface in the vertical moving process, and the situation that the rebound value is not accurate due to angle deviation when the rebound instrument is held manually is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pavement strength testing technology, and in particular to a pavement strength testing device for highway bridges. Background Technology

[0002] To test the pavement strength of highway bridges using a rebound hammer, the testing area must first be cleaned of dust and debris to ensure a smooth surface. During testing, the instrument is held manually, with the impact rod perpendicular to the pavement, and the impact is triggered after a smooth and firm contact with the surface. The rebound value is recorded, and multiple impacts at the same testing point are averaged. Combined with parameters such as the carbonation depth of the pavement concrete, the compressive strength is calculated according to the standard formula. During operation, the pressing angle and speed must be controlled to reduce errors and provide data for pavement structural safety assessment.

[0003] In the field of highway and bridge pavement strength testing, rebound hammers are commonly used equipment, but their traditional usage has significant drawbacks. Traditional rebound hammers are mostly independent structures without dedicated auxiliary components, relying entirely on manual hand-held operation. During testing, operators must bend over to ensure the impact rod is perpendicular to the road surface. Prolonged bending can easily lead to physical fatigue and make it difficult to accurately control the pressing angle. Angle deviations directly alter the impact path, resulting in inaccurate rebound values. Furthermore, the manual pressing speed and force are unstable; pressing too fast or too slow can interfere with the transmission of impact energy, further amplifying testing errors. In addition, traditional operation lacks a convenient fixed structure; slight road surface vibrations or hand tremors can affect testing stability. Moreover, the operating height cannot be flexibly adjusted according to the operator's height, resulting in poor applicability. These problems all contribute to the fact that the testing accuracy and efficiency cannot meet the high-strength testing requirements of highway and bridge pavements.

[0004] Based on this, a road bridge pavement strength testing device is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a highway bridge pavement strength testing device in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A highway bridge pavement strength testing device includes an outer frame, an inner frame, and a rebound hammer. A limiting column is fixedly connected to the inner frame, and a connecting cover is slidably connected to the limiting column. The outer frame is rotatably connected to the limiting column, and the rebound hammer is rotatably connected to the connecting cover. An auxiliary mechanism is connected to the outside of the connecting cover to assist the rebound hammer in pressing down, thereby realizing the testing of highway bridge pavement strength.

[0008] One end of the limiting post is fixedly connected to a spring, and the other end of the spring is fixedly connected to the connecting cover.

[0009] Preferably, a fixing rod is fixedly connected to the lower end of the outer frame.

[0010] Preferably, the lower end of the inner frame is rotatably connected to a flipping rod, and the lower end of the outer frame is provided with a storage slot.

[0011] Preferably, the auxiliary mechanism includes a pressure plate, an adjusting frame is fixedly connected to the outside of the connecting cover, a connecting piece is rotatably connected to one end of the pressure plate, the connecting piece is slidably connected to the adjusting frame, and an abutment frame is fixedly connected to the pressure plate.

[0012] Preferably, a locking pin is fixedly connected to one end of the connecting piece, a rack is fixedly connected to the adjusting frame, and a torsion spring is fixedly connected at the connection between the connecting piece and the pressure plate.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0014] 1. This application restricts the sliding direction of the connecting cover by limiting posts, inner frame and outer frame, to ensure that the rebound hammer always remains perpendicular to the road surface during the up and down movement, avoiding inaccurate rebound values ​​caused by angle deviation when manually held; on the other hand, the spring can automatically drive the connecting cover to reset after the rebound hammer test is completed, without the need for manual adjustment, reducing operation steps and improving testing efficiency.

[0015] 2. This application uses a foot-operated fixing rod to fix the overall position of the device, and with the unfolded flip rod, it makes stable contact with the road surface, avoiding interference from road vibration or hand shaking. At the same time, the flip rod can be stored in the storage slot when not in use, and the outer frame can also rotate and adjust relative to the limiting column, which is convenient to carry and can be adapted to different testing scenarios, improving the applicability of the device. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the strength testing device provided according to an embodiment of the present invention is shown;

[0017] Figure 2 A schematic diagram of the structure of the rebound spring connection provided according to an embodiment of the present invention is shown;

[0018] Figure 3 An exploded structural diagram of the connection point of the connecting cover according to an embodiment of the present invention is shown;

[0019] Figure 4 An exploded structural diagram of the pressure plate connection provided according to an embodiment of the present invention is shown.

[0020] Legend:

[0021] 1. Outer frame; 2. Fixing rod; 3. Connecting cover; 4. Rebound spring; 5. Storage slot; 6. Inner frame; 7. Flipping rod; 8. Spring; 9. Limiting post; 10. Adjusting frame; 11. Pressure plate; 12. Rack; 13. Locking post; 14. Connecting piece; 15. Torsion spring; 16. Abutment frame. Detailed Implementation

[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a technical solution:

[0024] A highway bridge pavement strength testing device includes an outer frame 1, an inner frame 6, and a rebound hammer 4. The hammer inside the instrument strikes the material surface with fixed energy. Due to differences in hardness or strength, the material will produce different degrees of elastic rebound. The "rebound value" recorded by the rebound hammer 4 has a statistical correlation with the compressive strength of the material. This structure is a direct reference to existing technology. A limiting column 9 is fixedly connected to the inner frame 6, and a connecting cover 3 is slidably connected to the limiting column 9. The outer frame 1 is rotatably connected to the limiting column 9, and the rebound hammer 4 is rotatably connected to the connecting cover 3. An auxiliary mechanism is connected to the outside of the connecting cover 3 to assist the rebound hammer 4 in pressing down, thereby realizing the testing of highway bridge pavement strength.

[0025] Specifically, such as Figure 3 As shown, a spring 8 is fixedly connected to one end of the limiting post 9, and the other end of the spring 8 is fixedly connected to the connecting cover 3. By setting the spring 8, the rebound hammer 4 can automatically reset the structure after detecting the road surface.

[0026] Specifically, such as Figure 1 As shown, a fixing rod 2 is fixedly connected to the lower end of the outer frame 1. The fixing rod 2 is set so that the inspection personnel can step on it to fix the structure of the device.

[0027] Specifically, such as Figure 2 As shown, the lower end of the inner frame 6 is rotatably connected to a flipping rod 7, and the lower end of the outer frame 1 is provided with a storage groove 5. When the flipping rod 7 is in a horizontal state, the lower end of the inner frame 6 is in a vertical state. At this time, the flipping rod 7 will be limited by the inner frame 6 and cannot be flipped upward from the horizontal state. It can only be flipped downward, thus achieving good contact between the structure and the road surface during testing.

[0028] Specifically, such as Figure 3 and Figure 4As shown, the auxiliary mechanism includes a pressure plate 11, an adjusting frame 10 connected to the outside of the connecting cover 3, a connecting piece 14 rotatably connected to one end of the pressure plate 11, and the connecting piece 14 slidably connected to the adjusting frame 10. By changing the position of the connecting piece 14 connected to the adjusting frame 10, the position of the pressure plate 11 can be changed, making it convenient for the testing personnel to press the pressure plate 11 to achieve the testing of the road surface. An abutment frame 16 is connected to the pressure plate 11, and one end of the abutment frame 16 can be made of anti-slip material to improve the stability of the connection of the pressure plate 11.

[0029] Specifically, such as Figure 4 As shown, a locking post 13 is fixedly connected to one end of the connecting piece 14, a rack 12 is fixedly connected to the adjusting frame 10, and a torsion spring 15 is fixedly connected at the connection between the connecting piece 14 and the pressure plate 11. By setting the torsion spring 15, the pressure plate 11 can be flipped to a vertical state when it is not subjected to external force, so as to achieve the effect of quick storage.

[0030] In summary, the highway bridge pavement strength testing device provided in this embodiment is suitable for testing the surface strength of highway bridge pavements, which are mostly made of concrete. A rebound hammer 4 is commonly used for this purpose. However, traditional rebound hammers 4 are independent and lack auxiliary testing components, requiring manual operation. This manual pressing method can affect testing accuracy due to inconsistent pressing stability. During pressing, the operator is bent over, making it difficult to ensure the rebound hammer 4 is perpendicular to the ground. This causes changes in the testing angle of the rebound hammer 4, and the bending also affects the pressing speed, making stable pressing impossible and further impacting testing accuracy.

[0031] When testing, the testing device needs to select a flat road or bridge surface. By rotating the flipping rod 7, the flipping rod 7 is separated from the storage groove 5. Then, the outer frame 1 is rotated so that when the upper ends of the outer frame 1 and the inner frame 6 are viewed from above, the structure forms a cross shape. At this time, the rebound hammer 4 can ensure that it is always perpendicular to the road surface. During the test, the tester can step on the fixing rod 2 to ensure the stability of the overall structure of the device.

[0032] Rotate the connecting cover 3, and according to the height of the tester, the locking pin 13 is locked onto the rack 12 at a suitable height to overcome the elasticity of the torsion spring 15. Flip the pressure plate 11 from the vertical state to the horizontal state, so that the abutting frame 16 abuts against the adjusting frame 10. At this time, the tester can press the rebound spring 4 in a comfortable state. Pressing down multiple times can accurately ensure the strength test of the same point.

[0033] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highway bridge pavement strength testing device, comprising an outer frame (1), an inner frame (6), and a rebound hammer (4), characterized in that, The inner frame (6) is fixedly connected to a limiting column (9), and a connecting cover (3) is slidably connected to the limiting column (9). The outer frame (1) is rotatably connected to the limiting column (9), and the rebound hammer (4) is rotatably connected to the connecting cover (3). An auxiliary mechanism is connected to the outside of the connecting cover (3) to assist the rebound hammer (4) in pressing down and to detect the strength of the road surface of the highway bridge. One end of the limiting post (9) is fixedly connected to a spring (8), and the other end of the spring (8) is fixedly connected to the connecting cover (3).

2. The highway bridge pavement strength testing device according to claim 1, characterized in that, The lower end of the outer frame (1) is fixedly connected to a fixing rod (2).

3. The highway bridge pavement strength testing device according to claim 1, characterized in that, The lower end of the inner frame (6) is rotatably connected to a flipping rod (7), and the lower end of the outer frame (1) is provided with a storage slot (5).

4. The highway bridge pavement strength testing device according to claim 1, characterized in that, The auxiliary mechanism includes a pressure plate (11), an adjustment frame (10) is fixedly connected to the outside of the connecting cover (3), a connecting piece (14) is rotatably connected to one end of the pressure plate (11), the connecting piece (14) is slidably connected to the adjustment frame (10), and an abutment frame (16) is fixedly connected to the pressure plate (11).

5. A highway bridge pavement strength testing device according to claim 4, characterized in that, One end of the connecting piece (14) is fixedly connected to a locking post (13), a rack (12) is fixedly connected to the adjusting frame (10), and a torsion spring (15) is fixedly connected at the connection between the connecting piece (14) and the pressure plate (11).

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