Highway bridge bearing capacity detection device

Abstract

The utility model relates to the technical field of bridge detection, and discloses a highway bridge bearing capacity detection device which comprises a bottom plate, a guide rail frame is arranged above the bottom plate, a base plate is fixedly connected to the outer wall of the middle section of the top of the guide rail frame, two sensors are installed on the outer wall of the top of the base plate, and two clamping seats used for clamping samples are installed on the outer wall of the guide rail frame. According to the utility model, through the arrangement of the angle adjusting mechanism, the inclination angle of the sample can be adjusted and the pressure applying direction can be changed according to the actual conditions of highway bridges inclined at different angles, so that the limitation that only the vertical bearing capacity of the sample can be detected in the prior art is broken through; therefore, the detection data is more fit with the actual bearing condition of the bridge, the problems of single detection data and poor detection effect are effectively solved, and the accuracy and comprehensiveness of the detection of the bearing capacity of the highway bridge are improved.

Description

Technical Field

[0001] This application relates to the field of bridge inspection technology, and in particular to a device for testing the load-bearing capacity of highway bridges. Background Technology

[0002] Over long-term use, the load-bearing capacity of highway bridges gradually decreases due to factors such as vehicle loads and the natural environment. To ensure the safe operation of bridges, it is necessary to periodically test their load-bearing capacity. The cross-sectional structure of a highway consists of a surface layer, base layer, subbase layer, and subgrade layer. This overall pavement structure collectively bears the loads from above. Different road grades and materials result in higher-grade pavements with stronger load-bearing capacity and traffic capacity. In short, a highway's load-bearing capacity is its ability to withstand the impact of vehicles. After a bridge is constructed, its load-bearing capacity is tested by sampling.

[0003] When testing the load-bearing capacity of highway bridges, the test sample is usually impacted by a gravity block in free fall. The damage state of the sample is observed to determine the load-bearing capacity. However, the gravity impact method has the risk of debris splashing and often requires a large drop space for the test, which has great limitations and is not suitable for testing in places with limited space. Therefore, there is also a test method that uses pressure equipment to apply pressure, which has a wider range of applications.

[0004] However, in the existing technology, the pressure of the pressure device is generally vertically downward, and the sample position is fixed horizontally. As a result, when testing the sample, only the vertical bearing capacity of the sample can be detected. In reality, there are often highway bridges with different angles of inclination. Therefore, the above test data is relatively simple, the test effect is poor, and it cannot well reflect the actual bearing situation. Therefore, a highway bridge bearing capacity testing device is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a highway bridge load-bearing capacity testing device to solve the problems mentioned in the background art.

[0006] The technical solution for a highway bridge load-bearing capacity testing device provided in this application is as follows:

[0007] A highway bridge load-bearing capacity testing device includes a base plate, a guide rail frame is arranged above the base plate, a pad is fixedly connected to the outer wall of the top middle section of the guide rail frame, two sensors are installed on the top outer wall of the pad, and two clamps for holding samples are installed on the outer wall of the guide rail frame.

[0008] An angle adjustment mechanism is installed between the base plate and the guide rail frame, which includes a lead screw, a screw block, a connecting rod, and a rotating shaft. The two lead screws are rotatably connected to the top outer wall of the base plate through a shaft seat. The multiple connecting rods are rotatably connected to the outer walls of both ends of the guide rail frame. The rotating shaft is rotatably connected between the bottom ends of the two connecting rods. The screw block is fixedly connected to the outer wall of the middle section of the rotating shaft and is threadedly connected to the lead screw.

[0009] Preferably, two stepper motors are fixedly installed on the top outer wall of the base plate by a bracket, and the output shaft of the stepper motor passes through the bracket and is fixedly connected to one end of the lead screw.

[0010] Preferably, the top outer wall of the base plate is fixedly connected to a plurality of guide rails, and the ends of the two rotating shafts are connected to guide wheels through connecting rods and rotatably connected to the inner wall of the guide rails.

[0011] Preferably, a mounting plate is fixedly connected to the bottom middle section outer wall of the guide rail frame, and a gear is rotatably connected to the top middle outer wall of the mounting plate. Racks are welded to the bottom outer walls of both clamps, and both racks mesh with the gear.

[0012] Preferably, the outer wall of the guide rail frame is slidably connected with a plurality of sliders, and every two sliders are fixedly connected to the bottom outer wall of the clamp.

[0013] Preferably, a cylinder is fixedly mounted on the bottom outer wall of one of the clamps by a fixing bracket, and the output end of the cylinder is fixedly connected to the bottom outer wall of the mounting plate.

[0014] Preferably, guide rails are fixedly connected to the outer walls on both sides of the base plate, a gantry frame is mounted on the base plate via the two guide rails, a hydraulic cylinder is fixedly installed on the outer wall of the middle section of the gantry frame, and an extrusion block is fixedly connected to the output end of the hydraulic cylinder.

[0015] Preferably, the top outer wall of the pad is provided with two rubber gaskets, and the sensor is located inside the rubber gaskets.

[0016] In summary, this application includes the following beneficial technical effects:

[0017] 1. This device, by setting an angle adjustment mechanism, can adjust the tilt angle of the sample according to the actual situation of highway bridges with different tilt angles, and change the direction of pressure application. It breaks through the limitation of existing technologies that can only detect the vertical bearing capacity of the sample, making the test data more consistent with the actual bearing condition of the bridge. It effectively solves the problems of single test data and poor test results, and improves the accuracy and comprehensiveness of highway bridge bearing capacity testing.

[0018] 2. Compared to the free-fall impact test method, this device uses a pressure testing method with a pressure device, which avoids the risk of debris splashing and does not require a large drop space, making it suitable for locations with limited space and expanding its application range. At the same time, the device is easy to operate through the automatic movement of the gantry and the automatic clamping and fixing of the clamp, which improves the flexibility and safety of the testing process and further enhances the practicality of the device. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of an embodiment of the application;

[0020] Figure 2 This is a partial cross-sectional view of an embodiment of the application;

[0021] Figure 3 This is a bottom-view exploded view of an embodiment of the application.

[0022] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Guide rail frame; 3. Slider; 4. Clamp; 5. Pad; 6. Sensor; 7. Rubber washer; 8. Mounting plate; 9. Gear; 10. Rack; 11. Guide rail one; 12. Lead screw; 13. Screw block; 14. Connecting rod; 15. Rotating shaft; 16. Guide wheel; 17. Guide rail two; 18. Gantry frame; 19. Hydraulic cylinder; 20. Extrusion block; 21. Support; 22. Stepper motor; 23. Cylinder. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0024] This application discloses a device for testing the load-bearing capacity of highway bridges. (Refer to...) Figure 1-3 A highway bridge load-bearing capacity testing device includes a base plate 1, a guide rail frame 2 above the base plate 1, a pad 5 fixedly connected to the outer wall of the top middle section of the guide rail frame 2, two sensors 6 (pressure sensors) installed on the outer wall of the top of the pad 5, two clamps 4 for holding samples installed on the outer wall of the guide rail frame 2, and an angle adjustment mechanism between the base plate 1 and the guide rail frame 2, which includes a lead screw 12, a screw block 13, a connecting rod 14 and a rotating shaft 15. The two lead screws 12 are rotatably connected to the top outer wall of the base plate 1 through a shaft seat, the multiple connecting rods 14 are rotatably connected to the outer walls of both ends of the guide rail frame 2, the rotating shaft 15 is rotatably connected between the bottom ends of the two connecting rods 14, and the screw block 13 is fixedly connected to the outer wall of the middle section of the rotating shaft 15 and threadedly connected to the lead screw 12.

[0025] Two stepper motors 22 are fixedly installed on the top outer wall of the base plate 1 via a bracket 21. The output shaft of the stepper motor 22 passes through the bracket 21 and is fixedly connected to one end of the lead screw 12. When the stepper motor 22 is started, its output shaft rotates, which drives the lead screw 12 to rotate. Since the screw block 13 is threadedly connected to the lead screw 12, the rotation of the lead screw 12 will cause the screw block 13 to move on the lead screw 12, which in turn drives the rotating shaft 15 to move. The movement of the rotating shaft 15 will push the connecting rod 14 to rotate, thereby realizing the adjustment of the angle of the guide rail frame 2.

[0026] Multiple guide rails 11 are fixedly connected to the top outer wall of the base plate 1. The ends of two rotating shafts 15 pass through the connecting rod 14 and are rotatably connected to guide wheels 16. The guide wheels 16 are rolled on the inner wall of the guide rails 11. During the movement of the rotating shafts 15, the guide wheels 16 roll in the guide rails 11, which guides the movement of the rotating shafts 15 and ensures the stability of the angle adjustment process.

[0027] A mounting plate 8 is fixedly connected to the bottom middle section of the outer wall of the guide rail frame 2. A gear 9 is rotatably connected to the top middle outer wall of the mounting plate 8. A rack 10 is welded to the bottom outer wall of each of the two clamps 4. Both racks 10 mesh with the gear 9. Multiple sliders 3 are slidably connected to the outer wall of the guide rail frame 2. Every two sliders 3 are fixedly connected to the bottom outer wall of the clamp 4. A cylinder 23 is fixedly installed on the bottom outer wall of one of the clamps 4 through a fixing frame. The output end of the cylinder 23 is fixedly connected to the bottom outer wall of the mounting plate 8. When the cylinder 23 is activated, its output end extends and retracts, causing the clamp 4 connected to it to move. When the clamp 4 moves, the gear 9 is driven to rotate through the rack 10. The rotation of the gear 9 will drive another rack 10 to move, thereby causing the other clamp 4 to move accordingly. Since the sliders 3 are slidably connected to the guide rail frame 2, the movement of the clamp 4 is more stable, realizing the clamping or releasing of the sample.

[0028] Guide rails 17 are fixedly connected to the outer walls on both sides of the base plate 1. A gantry frame 18 is installed on the base plate 1 via the two guide rails 17. A hydraulic cylinder 19 is fixedly installed on the outer wall of the middle section of the gantry frame 18. A pressing block 20 is fixedly connected to the output end of the hydraulic cylinder 19. The gantry frame 18 can be pushed to move along the guide rails 17 to adjust its position. When the hydraulic cylinder 19 is started, its output end extends and retracts, driving the pressing block 20 to move. The pressing block 20 presses the sample to test the sample's load-bearing capacity.

[0029] Two rubber gaskets 7 are provided on the top outer wall of the pad 5. The sensor 6 is located inside the rubber gaskets 7. The rubber gaskets 7 can protect the sensor 6 and reduce the impact on the sensor 6 during sample placement or detection.

[0030] The implementation principle of the highway bridge load-bearing capacity testing device in this application embodiment is as follows: When in use, the sample is placed between two clamps 4, the cylinder 23 is activated to bring the two clamps 4 closer together to clamp and fix the sample, according to the testing requirements, the stepper motor 22 is activated, and the angle of the guide rail frame 2 is adjusted by the angle adjustment mechanism to make the sample in the required tilt state, the drive mechanism inside the gantry frame 18 is activated to move the gantry frame 18 along the guide rail 17 to a suitable position, the hydraulic cylinder 19 is activated to make the extrusion block 20 extrude the sample, and the sensor 6 will detect the pressure and other data of the sample in real time to complete the test of the load-bearing capacity of the highway bridge sample.

[0031] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0032] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0033] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A load-bearing capacity testing device for highway bridges, comprising a base plate (1), characterized in that: A guide rail frame (2) is provided above the base plate (1). A pad (5) is fixedly connected to the outer wall of the top middle section of the guide rail frame (2). Two sensors (6) are installed on the top outer wall of the pad (5). Two clamps (4) for holding samples are installed on the outer wall of the guide rail frame (2). An angle adjustment mechanism is installed between the base plate (1) and the guide rail frame (2), which includes a lead screw (12), a screw block (13), a connecting rod (14) and a rotating shaft (15). The two lead screws (12) are rotatably connected to the top outer wall of the base plate (1) through a bearing seat. The multiple connecting rods (14) are rotatably connected to the outer walls of both ends of the guide rail frame (2). The rotating shaft (15) is rotatably connected between the bottom ends of the two connecting rods (14). The screw block (13) is fixedly connected to the middle section outer wall of the rotating shaft (15) and threadedly connected to the lead screw (12).

2. The highway bridge load-bearing capacity testing device according to claim 1, characterized in that: Two stepper motors (22) are fixedly installed on the top outer wall of the base plate (1) by a bracket (21). The output shaft of the stepper motor (22) passes through the bracket (21) and is fixedly connected to one end of the lead screw (12).

3. The highway bridge load-bearing capacity testing device according to claim 2, characterized in that: The top outer wall of the base plate (1) is fixedly connected to multiple guide rails (11), and the ends of the two rotating shafts (15) pass through the connecting rod (14) and are rotatably connected to guide wheels (16). The guide wheels (16) are rolled on the inner wall of the guide rails (11).

4. The highway bridge load-bearing capacity testing device according to claim 1, characterized in that: The bottom middle section of the guide rail frame (2) is fixedly connected to the outer wall of the mounting plate (8), and the top middle outer wall of the mounting plate (8) is rotatably connected to the gear (9). The bottom outer walls of the two clamps (4) are welded with racks (10), and the two racks (10) mesh with the gears (9).

5. The highway bridge load-bearing capacity testing device according to claim 1, characterized in that: The outer wall of the guide rail frame (2) is slidably connected with multiple sliders (3), and every two sliders (3) are fixedly connected to the bottom outer wall of the clamp (4).

6. The highway bridge load-bearing capacity testing device according to claim 4, characterized in that: A cylinder (23) is fixedly mounted on the bottom outer wall of one of the clamps (4) by a fixing bracket, and the output end of the cylinder (23) is fixedly connected to the bottom outer wall of the mounting plate (8).

7. The highway bridge load-bearing capacity testing device according to claim 1, characterized in that: The bottom plate (1) is fixedly connected to the outer walls on both sides by guide rails (17). The bottom plate (1) is equipped with a gantry frame (18) through the two guide rails (17). A hydraulic cylinder (19) is fixedly installed on the outer wall of the middle section of the gantry frame (18). An extrusion block (20) is fixedly connected to the output end of the hydraulic cylinder (19).

8. The highway bridge load-bearing capacity testing device according to claim 1, characterized in that: Two rubber gaskets (7) are provided on the top outer wall of the pad (5), and the sensor (6) is located inside the rubber gaskets (7).

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