Bridge impact testing machine

Abstract

This utility model relates to a bridge impact testing machine in the field of testing technology. Addressing the problem that existing equipment cannot simulate diverse and complex impact conditions, this testing machine includes a frame, a guide frame, support frame I, and support frame II. Impact mechanism I controls the raising and lowering of impactor I by electromagnet I engaging with attraction seat I; impactor I has a V-shaped bottom. Impact mechanism II controls the raising and lowering of impactor II by electromagnet II engaging with attraction seat II; impactor II is square and one end is covered with a steel angle iron. Adjustable spacing support blocks are installed below the frame to accommodate different sample sizes. This design utilizes a dual-impact mechanism to achieve multiple impact modes, such as free-fall impact and directional impact, simulating complex working conditions encountered by actual bridges. Flexible settings for height and number of impacts improve the comprehensiveness and accuracy of test data, making it suitable for evaluating the impact resistance performance of bridge materials.

Description

Technical Field

[0001] This utility model relates to the field of bridge inspection technology, and in particular to a bridge impact testing machine. Background Technology

[0002] Bridge impact testing machines are key equipment used to evaluate the impact resistance of bridge materials or components under instantaneous impact loads. They are widely used in bridge construction, material research and development, and quality control, and are an important testing tool to ensure the safety and durability of bridge structures.

[0003] Currently, existing bridge impact testing machines typically only have a single impact testing method. Although they can complete basic impact testing operations to a certain extent, they cannot simulate the diverse and complex impact conditions that bridges may encounter in actual use. As a result, the obtained bridge impact resistance performance data is not comprehensive and accurate enough, making it difficult to meet the increasingly higher requirements for the scientificity and reliability of bridge design and evaluation. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies that cannot simulate the diverse and complex impact conditions that bridges may encounter in actual use, resulting in incomplete and inaccurate data on bridge impact resistance. Therefore, this invention proposes a bridge impact testing machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bridge impact testing machine, comprising:

[0007] The frame has four omnidirectional brake wheels fixedly installed at the bottom of the rectangular shape. Guide frames are fixedly installed on both sides of the inner wall of the frame. The same support frame I is slidably installed on the outside of the two guide frames. The same support frame II is slidably installed on the outside of the two guide frames below the support frame I.

[0008] The support frame I is equipped with an impact mechanism I, which is used to conduct impact tests on the bridge sample. The support frame I is also equipped with an impact mechanism II, which is used to conduct impact tests on the bridge sample.

[0009] In one possible design, the impact mechanism I includes an electromagnet I fixedly mounted at the bottom of a support frame I. The bottom of the electromagnet I is detachably connected to a suction seat I. The suction seat I is fixedly connected to the top of the support frame II. An impactor I is fixedly mounted at the bottom of the support frame II. A reducer is fixedly mounted at the top of the frame. A rotating rod is fixedly mounted at the output end of the reducer. Turntables I are fixedly mounted on the outside of both ends of the rotating rod. Cables I are wound around the outside of both turntables I. One end of each cable I is fixedly connected to the top two sides of the support frame I, and the other end of each cable I is fixedly connected to the two turntables I.

[0010] In one possible design, the impact mechanism II includes a frame fixedly mounted on one side of the support frame I. A slide is slidably mounted on one side of the frame, and an L-shaped sample holder is slidably mounted below the slide on one side of the frame. An impactor II is placed on the L-shaped sample holder. An electromagnet II is fixedly mounted at the bottom of the slide. A suction seat II is detachably attracted to the bottom of the electromagnet II. The suction seat II is fixedly connected to the top of the L-shaped sample holder. A motor is fixedly mounted on one side of the top of the frame. A turntable II is fixedly mounted on the output shaft of the motor. A cable II is wound around the outside of the turntable II. One end of the cable II is fixedly connected to the top of the slide, and the other end of the cable II is fixedly connected to the turntable II.

[0011] In one possible design, a fixing frame is fixedly installed on one side of the bottom of the frame, a cylinder is embedded in the top of the fixing frame, a slide block is slidably installed through the top of the cylinder, a spring is installed inside the cylinder, and the two ends of the spring are fixedly connected to the bottom wall of the cylinder and the bottom of the slide block respectively through spring seats. A support is fixedly installed on the top of the slide block outside the cylinder, and a support block corresponding to the support is fixedly installed on the rear side of the frame.

[0012] In one possible design, the impactor II is square, with one end of the impactor II having a bottom edge covered with a steel angle iron.

[0013] In one possible design, two support blocks are symmetrically arranged at the bottom of the frame. A connecting frame is fixedly installed on the side of the two support blocks that are close to each other. The same bidirectional lead screw is threadedly connected to the side of the two connecting frames that are close to each other. A rectangular adjusting block is fixedly installed in the middle section of the bidirectional lead screw.

[0014] In one possible design, the impactor I is made of steel and has a V-shaped cross-section at its bottom.

[0015] In one possible design, the impactor I and the two support blocks are both made of hardwood.

[0016] In this application, when starting to use the device, the sample is taken out, and then the distance between the two support blocks is adjusted according to the size of the sample. First, the two connecting frames are fixed to the sides of the two support blocks that are close to each other with screws. Then, the rectangular adjusting block is rotated. As the rectangular adjusting block rotates, the bidirectional lead screw rotates synchronously. As the bidirectional lead screw rotates, the two connecting frames move towards each other or away from each other, thereby moving the two support blocks towards each other or away from each other according to the size of the sample, thereby changing the distance between the two support blocks. After adjustment, the bridge sample to be tested is placed stably on the two support blocks. Then, the frame is moved above the sample, and then the device is connected to the power supply.

[0017] The first impact test was conducted. A square impactor II, meeting the experimental requirements, was selected and placed stably on the L-shaped sample holder. It was ensured that the impactor II was accurately positioned without any shaking or shifting, and that the angle irons at the corners of the impactor II were at the bottom and directly above the sample. The L-shaped sample holder was then raised or lowered using the control devices on the operating equipment (such as a control panel). (The motor was started, driving the turntable II to rotate, winding or releasing cable II, which then raised or lowered the carriage along with the square impactor II.) During adjustment, the relative position between the square impactor II and the bridge sample was closely observed. The square impactor II was accurately placed above the sample to ensure accurate impact. Then, the control panel was operated to energize electromagnet II. Electromagnet II generated a strong attraction, firmly holding the suction seat II on the L-shaped sample holder, preventing accidental movement of the sample holder during subsequent experiments. Next, the required parameters, such as the height and number of impacts, were set on the control panel. The height parameter was precisely set according to the experimental requirements to ensure that the impactor II fell from the specified height to impact the sample. The number of impacts is determined according to the experimental plan to simulate impacts under different conditions. After setting, click the zero button to clear the counter and other relevant data of the equipment to prepare for the start of the experiment. After confirming that all parameters are set correctly, press the start button. The testing machine will run according to the preset program. The motor will start and drive the turntable II to rotate, winding the cable II. The cable II will lift the carriage together with the square impactor II to the test height. When the test height is reached, the electromagnet II will be de-energized, the L-shaped sample frame will fall under the action of gravity, and the square impactor II will fall freely to impact the bridge sample, completing one impact action. The testing machine will automatically record the number of impacts and related data. Repeat the above impact process until the set number of impacts is reached. When the test reaches the set number of impacts, the testing machine will automatically stop running and issue an alarm signal to indicate that the test is completed. During the test, if any sudden situation occurs, such as abnormal vibration, abnormal noise, or impactor jamming, the operator should immediately press the stop button or emergency stop button to stop the test. After the equipment has completely stopped running, check the cause of the equipment failure. After troubleshooting, decide whether to continue the test based on the actual situation.

[0018] The second impact test is conducted. Electromagnet I above the V-shaped impactor I is energized, attracting the suction seat I. Suction seat I is fixedly connected to support frame II, which in turn is connected to impactor I, thus securing impactor I to support frame I. The reducer is then activated, causing the rotating rod to rotate. The turntables I at both ends of the rod rotate accordingly, winding or releasing cable I. Cable I raises or lowers support frame I along with impactor I, positioning the V-shaped impactor I at a suitable position above the sample. The "Set to Zero" button on the control panel is then pressed, setting the current position of impactor I as the zero point, serving as a reference for subsequent lifting and impact. The impact is then adjusted by operating the relevant adjustment devices to raise or lower the impactor. The impactor is initially positioned (at this time, the reducer starts, the reducer drives the rotating rod to rotate, and the turntables I at both ends of the rotating rod rotate accordingly, winding the cable I, and lifting the support frame I together with the impactor I to the test height through the cable I), so that it reaches the predetermined impact starting height. When the test height is reached, the electromagnet I is de-energized, and the impactor I falls freely under the action of gravity, impacting the bridge sample and completing one impact action. If multiple impact tests are required, the above steps of lifting and impacting the impactor I are repeated until all the preset number of impacts are completed. During the test, the impact height, number of impacts and other parameters can be adjusted in a timely manner according to the actual test conditions, such as the degree of sample damage and impact effect, in order to obtain more accurate test data.

[0019] After the test, first turn off the power of the testing machine to ensure that the equipment stops running completely, and carefully remove the bridge sample from the support block. Conduct a detailed inspection and record the sample, observe the damage condition of the sample, such as cracks and the degree of deformation, and take photos as test data for preservation.

[0020] This utility model has the following beneficial effects:

[0021] In this invention, the impact mechanism I is stably fixed by electromagnet I holding the suction seat I connected to the impactor I. The reducer is started to drive the rotating rod and turntable I to rotate. The cable I can be used to precisely adjust the rise or fall of the impactor I, so that it is positioned at a suitable position above the sample and a zero point can be set as a reference. It can be accurately raised to the predetermined impact starting height and then dropped freely to impact the sample. The impact height, number of impacts and other parameters can also be flexibly adjusted according to the actual test conditions, which helps to obtain more accurate and comprehensive test data to simulate impact conditions under different conditions and better evaluate the performance of bridge samples under impact.

[0022] In this invention, the impact mechanism II utilizes the powerful attraction generated by the energized electromagnet II to firmly hold the suction seat II on the L-shaped sample holder, effectively preventing accidental movement of the sample holder during the experiment and ensuring precise impact positioning. The motor drives the turntable II to rotate, winding or releasing the cable II, allowing precise control of the rise and fall of the square impactor II, ensuring it is accurately positioned above the sample and falls freely from a specified height to impact the sample. Furthermore, the control panel allows for flexible setting of parameters such as impact height and number of impacts to meet various experimental requirements, providing strong support for simulating diverse impact scenarios and obtaining accurate and reliable impact test data for bridge samples.

[0023] This invention combines impact mechanism I and impact mechanism II to achieve diverse impact testing modes, which can comprehensively simulate various complex impact conditions that bridges may encounter in actual use. This provides a strong guarantee for obtaining more accurate and detailed data on the bridge's impact resistance performance, and helps to improve the scientificity and reliability of bridge design and evaluation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall front view and a partially enlarged structure of a bridge impact testing machine proposed in this utility model.

[0025] Figure 2 This is a rear view and a partially enlarged structural schematic diagram of a bridge impact testing machine proposed in this utility model.

[0026] Figure 3 This is a schematic diagram of the overall bottom view of a bridge impact testing machine proposed in this utility model;

[0027] Figure 4 This is a cross-sectional structural diagram of the cylinder of a bridge impact testing machine proposed in this utility model.

[0028] In the diagram: 1. Frame; 2. Guide frame; 3. Support frame I; 4. Support frame II; 5. Frame; 6. Reducer; 7. Rotating rod; 8. Turntable I; 9. Cable I; 10. Electromagnet I; 11. Suction seat I; 12. Impactor I; 13. Slide; 14. L-shaped sample rack; 15. Electromagnet II; 16. Suction seat II; 17. Motor; 18. Turntable II; 19. Cable II; 20. Impactor II; 21. Steel angle iron; 22. Fixing frame; 23. Cylinder; 24. Slide; 25. Spring; 26. Support; 27. Support block; 28. Connecting frame; 29. ​​Two-way lead screw; 30. Rectangular adjusting block. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] In one embodiment

[0031] Reference Figure 1-4 An impact testing machine, comprising:

[0032] The test machine consists of components such as frame 1, guide frame 2, support frame I 3, support frame II 4, impact mechanism I, impact mechanism II, and support block 27. Frame 1 serves as the main support for the entire test machine. Its bottom is rectangular and fixedly equipped with four universal brake wheels to facilitate the movement and fixation of the test machine. Guide frames 2 are fixedly installed on both sides of the inner wall of frame 1. The two guide frames 2 are arranged in parallel. Support frame I 3 is slidably installed outside the guide frames 2. At the same time, support frame II 4 is slidably installed outside the two guide frames 2 and below support frame I 3. Support frame I 3 and support frame II 4 can slide up and down along the guide frames 2 to achieve different height adjustments.

[0033] Impact mechanism I is mounted on support frame I3 and is used for impact testing of bridge samples. It includes an electromagnet I10 fixedly mounted at the bottom of support frame I3. The bottom of electromagnet I10 can be detached from and attracted to a suction seat I11. Suction seat I11 is fixedly connected to the top of support frame II4. By energizing and de-energizing electromagnet I10, it can achieve attraction and disengagement with suction seat I11, thereby controlling the connection state between support frame II4 and support frame I3. An impactor I12 is fixedly mounted at the bottom of support frame II4. Impactor I12 is made of steel and has a V-shaped cross-section at its bottom, which helps to produce a specific impact on the sample during impact. The mechanism is as follows: A reducer 6 is fixedly installed on the top of the frame 1. A rotating rod 7 is fixedly connected to the output end of the reducer 6. The rotating rod 7 is placed horizontally, and turntables I8 are fixedly installed on both ends of the rod. Cables I9 are wound on the two turntables I8 respectively. One end of the two cables I9 is ​​fixedly connected to the top sides of the support frame I3 respectively, and the other end is fixedly connected to the two turntables I8 respectively. When the reducer 6 starts, it drives the rotating rod 7 to rotate. The rotating rod 7 drives the turntables I8 to rotate. The turntables I8 raise or lower the support frame I3 and the connected support frame II4 and impactor I12 by winding or releasing the cables I9.

[0034] Impact mechanism II is also mounted on support frame I3, used for another type of impact test on bridge samples. A frame 5 is fixedly mounted on one side of support frame I3, and a slide 13 is slidably mounted on one side of frame 5. An L-shaped sample holder 14 is slidably mounted below the slide 13 on one side of frame 5. An impactor II 20 is placed on the L-shaped sample holder 14. The impactor II 20 is square, with one end of its bottom edge covered by a steel angle iron 21. An electromagnet II 15 is fixedly mounted on the bottom of the slide 13. The bottom of the electromagnet II 15 can detach and engage with a suction seat II 16. The suction seat II 16 and the top of the L-shaped sample holder 14 are connected... The connection between the L-shaped sample holder 14 and the slide 13 is fixedly connected by the energization and de-energization of the electromagnet II 15. A motor 17 is fixedly installed on one side of the top of the frame 5. A turntable II 18 is fixedly installed on the output shaft of the motor 17. A cable II 19 is wound around the outside of the turntable II 18. One end of the cable II 19 is fixedly connected to the top of the slide 13, and the other end is fixedly connected to the turntable II 18. When the motor 17 starts, it drives the turntable II 18 to rotate. The turntable II 18 raises or lowers the slide 13 and the connected L-shaped sample holder 14 and impactor II 20 by winding or releasing the cable II 19.

[0035] A fixing frame 22 is fixedly installed on one side of the bottom of the frame 5. A cylinder 23 is embedded in the top of the fixing frame 22. The cylinder 23 is placed vertically, and a slide block 24 is slidably installed through its top. A spring 25 is installed inside the cylinder 23. The two ends of the spring 25 are fixedly connected to the bottom wall of the cylinder 23 and the bottom of the slide block 24 through spring seats, respectively. A support 26 is fixedly installed on the top of the slide block 24 outside the cylinder 23. A support block corresponding to the support 26 is fixedly installed on the rear side of the frame 5. During the test, when the L-shaped sample rack 14 and the impactor II 20 descend and impact, it can play a certain role in buffering and stabilizing.

[0036] This application can be used in the field of bridge impact testing machine technology, or in other fields applicable to this application.

[0037] In another embodiment

[0038] Reference Figure 1-2A bridge impact testing machine is disclosed, applying the technical field of bridge impact testing machines. Two support blocks 27 are symmetrically arranged below the frame 1 for placing bridge samples. A connecting frame 28 is fixedly installed on the side of each support block 27 that is close to it. The two connecting frames 28 are threadedly connected to the same lead screw 29 on the side that is close to it. A rectangular adjusting block 30 is fixedly installed in the middle section of the lead screw 29. By rotating the rectangular adjusting block 30, the lead screw 29 can be rotated. When the lead screw 29 rotates, the two connecting frames 28 move along the lead screw 29 in a direction that brings them closer together or further apart, thereby adjusting the distance between the two support blocks 27 to accommodate bridge samples of different sizes. In actual use, the distance between the two support blocks 27 is adjusted by rotating the rectangular adjusting block 30 according to the size of the bridge sample, and then the sample is placed stably on the two support blocks 27.

[0039] As is known to those skilled in the art, the specific working principles and circuit connection methods of the reducer 6, electromagnet I 10, electromagnet II 15, and motor 17 are conventional technical means. In specific implementation, technicians can select components and configure parameters according to the performance requirements of the actual application scenario (such as torque parameters, response speed, etc.) and with reference to conventional technical standards in this field. The above-mentioned specific configuration methods do not constitute a limitation on the scope of protection of this patent.

[0040] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bridge impact testing machine, characterized in that, include: The frame (1) has four universal brake wheels fixedly installed at the bottom of the frame (1) in a rectangular shape. Guide frames (2) are fixedly installed on both sides of the inner wall of the frame (1). The same support frame I (3) is slidably installed on the outside of the two guide frames (2). The same support frame II (4) is slidably installed on the outside of the two guide frames (2) below the support frame I (3). The support frame I (3) is provided with an impact mechanism I, which is used to conduct impact tests on the bridge sample. The support frame I (3) is also provided with an impact mechanism II, which is used to conduct impact tests on the bridge sample.

2. The bridge impact testing machine according to claim 1, characterized in that, The impact mechanism I includes an electromagnet I (10) fixedly installed at the bottom of the support frame I (3). The bottom of the electromagnet I (10) can be detached and attracted by a suction seat I (11). The suction seat I (11) is fixedly connected to the top of the support frame II (4). An impactor I (12) is fixedly installed at the bottom of the support frame II (4). A reducer (6) is fixedly installed at the top of the frame (1). A rotating rod (7) is fixedly installed at the output end of the reducer (6). Turntables I (8) are fixedly installed on both ends of the rotating rod (7). Cables I (9) are wound around the outside of the two turntables I (8). One end of the two cables I (9) is fixedly connected to the top two sides of the support frame I (3), and the other end of the two cables I (9) is fixedly connected to the two turntables I (8).

3. The bridge impact testing machine according to claim 1, characterized in that, The impact mechanism II includes a frame (5) fixedly mounted on one side of the support frame I (3). A slide (13) is slidably mounted on one side of the frame (5). An L-shaped sample holder (14) is slidably mounted on one side of the frame (5) below the slide (13). An impactor II (20) is placed on the L-shaped sample holder (14). An electromagnet II (15) is fixedly mounted at the bottom of the slide (13). A suction seat II (16) can be detached from the bottom of the electromagnet II (15). The suction seat II (16) is fixedly connected to the top of the L-shaped sample holder (14). A motor (17) is fixedly mounted on one side of the top of the frame (5). A turntable II (18) is fixedly mounted on the output shaft of the motor (17). A cable II (19) is wound around the outside of the turntable II (18). One end of the cable II (19) is fixedly connected to the top of the slide (13), and the other end of the cable II (19) is fixedly connected to the turntable II (18).

4. A bridge impact testing machine according to claim 3, characterized in that, A fixing frame (22) is fixedly installed on one side of the bottom of the frame (5). A cylinder (23) is embedded in the top of the fixing frame (22). A slide block (24) is slidably installed through the top of the cylinder (23). A spring (25) is installed inside the cylinder (23). The two ends of the spring (25) are fixedly connected to the bottom wall of the cylinder (23) and the bottom of the slide block (24) respectively through spring seats. A support (26) is fixedly installed on the top of the slide block (24) outside the cylinder (23). A support block corresponding to the support block (26) is fixedly installed on the rear side of the frame (5).

5. A bridge impact testing machine according to claim 3, characterized in that, The impactor II (20) is square, and one end of the impactor II (20) is covered with a steel angle iron (21) at its bottom edge.

6. A bridge impact testing machine according to claim 1, characterized in that, Two support blocks (27) are symmetrically arranged below the frame (1). A connecting frame (28) is fixedly arranged on the side of the two support blocks (27) that are close to each other. The same bidirectional screw (29) is threadedly connected to the side of the two connecting frames (28) that are close to each other. A rectangular adjusting block (30) is fixedly arranged in the middle section of the bidirectional screw (29).

7. A bridge impact testing machine according to claim 2, characterized in that, The impactor I (12) is made of steel and has a V-shaped cross section at the bottom.

8. A bridge impact testing machine according to claim 2, characterized in that, The impactor I (12) and the two support blocks (27) are both made of hardwood.

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