Highway pavement rebound deflection value detection equipment

Abstract

The utility model discloses highway pavement rebound deflection value detection equipment, which relates to the technical field of highway detection equipment, and comprises a bidirectional screw rod and a rotating rod which are connected to a cross beam, are arranged in parallel, and are movably connected with a movable frame; one end of the moving frame is in threaded connection with the two-way screw rod, the other end of the moving frame is in sliding connection with the rotating rod through a through groove, a spiral block rotationally matched with the through groove is arranged on the rotating rod, a hammering block is fixedly connected to the lower portion of the moving frame, and the hammering block vertically slides along the falling frame; a protection plate is arranged at the bottom of the falling frame, fixedly connected to the rotating rod and controlled by rotation of the rotating rod. The utility model provides the highway pavement rebound deflection value detection equipment which is more automatic and intelligent and reduces unnecessary manual intervention, so that the accuracy and the efficiency of detection work are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to road detection equipment technical field, concretely relates to a road pavement resilience deflection value detection equipment. BACKGROUND

[0002] Pavement deflection detection is crucial for evaluating pavement bearing capacity and service performance, which not only has key significance for engineering quality inspection and control, but also affects the scientificity and rationality of road network maintenance decision. Portable drop hammer deflection instrument can quickly measure subgrade reaction coefficient K value and subgrade elastic modulus E value due to its portability, easy operation, and is one of the widely used detection tools.

[0003] However, in the prior art, such as a device for detecting road pavement resilience deflection value disclosed in Chinese patent No. "CN213233079U", although a method for adjusting the height of the counterweight hammer by manually pulling the handle is provided, and the counterweight hammer is fixed at the required position by using an electromagnet for testing, but this method needs manual operation to complete multiple steps, including sliding cylinder adjusting counterweight hammer height and resetting the rod, etc., the process is relatively complicated, consumes manpower, and affects the detection efficiency and convenience.

[0004] In view of the above, it is necessary to improve the existing device for detecting road pavement resilience deflection value to simplify the operation process, improve the work efficiency, make the whole detection process more automated and intelligent, reduce unnecessary manual intervention, and thus improve the accuracy and efficiency of the detection work. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model

[0006] The technical problem to be solved by the utility model is to provide a device for detecting road pavement resilience deflection value, which is more automated and intelligent, reduces unnecessary manual intervention, and thus improves the accuracy and efficiency of the detection work.

[0007] Technical scheme

[0008] To solve the above problems, the technical scheme provided by the utility model is:

[0009] A device for detecting road pavement resilience deflection value, comprising a bidirectional screw rod and a rotating rod connected to a cross beam, the bidirectional screw rod and the rotating rod are arranged in parallel, a movable frame is movably connected to the bidirectional screw rod and the rotating rod, one end of the movable frame is threadedly connected to the bidirectional screw rod, the other end of the movable frame is slidably connected to the rotating rod through a through slot, a spiral block is arranged on the rotating rod and rotates with the through slot, a hammer block is fixedly connected below the movable frame and vertically slides along a vertical frame, a protective plate is arranged at the bottom of the vertical frame and is fixedly connected to the rotating rod and controlled by the rotation of the rotating rod.

[0010] The crossbeam serves as a support structure, and the bidirectional screw rod and the rotating rod are both connected to the crossbeam, ensuring the stability and accuracy of the entire device. The bidirectional screw rod and the rotating rod are both arranged in parallel to provide a movement track for the moving frame. The bidirectional screw rod allows the moving frame to be threaded on it and adjust its position, while the rotating rod, through the spiral block on it, cooperates with the through slot on the moving frame, so that the moving frame can slide along the rotating rod while driving the rotating rod and the protective plate to rotate. One end of the moving frame is threaded on the bidirectional screw rod, and the other end is connected to the rotating rod through the through slot, which can realize up and down movement according to the rotation direction of the bidirectional screw rod, thereby adjusting the position of the hammering block. The hammering block is fixed below the moving frame and can freely slide in the vertical direction within the drop frame, used to apply impact to the road surface to measure the deflection value. The drop frame provides a vertical sliding track for the hammering block and ensures that the hammering block falls accurately to the test point. The protective plate is fixed to the bottom of the rotating rod and is controlled by the rotation of the rotating rod, used to protect the equipment or test area, covering or protecting the test point when not in use.

[0011] As an option, the protective plate is fixed to the rotating rod through a connecting rod, and the end of the connecting rod is equipped with a pull rod. The pull rod can be elastically extended and retracted, and the end is equipped with a plug column. The end of the connecting rod is equipped with a plug slot, and the plug column cooperates with the plug slot.

[0012] The connecting rod protective plate is fixed to the rotating rod through a connecting rod. This means that when the rotating rod rotates, the connecting rod can drive the protective plate to perform corresponding actions, such as opening or closing to expose or protect the test point.

[0013] Pull rod: A pull rod is equipped at the end of the connecting rod. This pull rod can be elastically extended and retracted. The elastic extension and retraction allow the rotation of the rotating rod and the connecting rod to be fixed by the pull rod. The end of the pull rod is equipped with a plug column, and the end of the connecting rod is equipped with a plug slot. The plug column and the plug slot are used in cooperation. This design allows the pull rod and the connecting rod to be stably connected while being easily disconnected. In addition, since the pull rod is elastically extendable and retractable, it can adjust the length within a certain range, thereby increasing the convenience and adaptability of the device in use.

[0014] As an option, the tail of the plug column is equipped with a limiting ring, and the limiting ring is connected with a spring. The other end of the spring is connected to a fixed structure, and the other end of the pull rod is equipped with an additional section of volume.

[0015] A limiting ring is located at the tail of the insertion pin. Its function is to limit the maximum stroke of the pin, preventing it from going too far out of the slot, and to provide the starting point for the spring's elastic force. One end of the spring is connected to the limiting ring, and the other end is connected to the fixing structure (protective shell). The spring's elasticity provides an inward pulling force to the pin, ensuring it remains securely in the slot and allowing for easy insertion and removal when needed, without easily loosening or falling out. This extra volume refers to an extended section at the end of the lever (protruding outside the protective shell). This increases ease of operation, making it easier for the operator to grip and manipulate the lever.

[0016] Optionally, the bidirectional lead screw is connected to a motor.

[0017] Automated adjustment of the moving frame position can be achieved by using a motor-driven bidirectional lead screw. This eliminates the need for manual adjustment, reducing manual steps and improving work efficiency. The motor can precisely control the rotation direction and speed of the bidirectional lead screw according to a preset program or operator instructions, enabling the moving frame to be accurately positioned as required.

[0018] Optionally, the end of the movable frame is provided with a pointer, and the pointer is provided with a scale.

[0019] The combination of pointer and scale allows operators to intuitively and accurately read the position of the moving frame. This is crucial for operations requiring precise positioning of the hammer block or other critical components. This method ensures the consistency and accuracy of the moving frame's position during each test, reducing measurement errors caused by positional deviations. Operators can quickly determine the current position of the moving frame without relying on external tools or complex measurement methods. This not only improves work efficiency but also simplifies the operation process, making the entire testing process smoother.

[0020] Optionally, the hammer block is nested within the drop frame and slidably connected, and the shape of the hammer block is adapted to the drop frame.

[0021] Because the hammer block and the drop frame are perfectly matched in shape, the hammer block can slide precisely vertically within the drop frame. This precise guidance ensures the accuracy and consistency of each strike, effectively reducing errors caused by the hammer block deviating from the predetermined path. The matching design also increases the system's stability. As the hammer block slides along the drop frame, unnecessary swaying or offset is reduced, allowing the impact force to be transmitted to the road surface more directly and effectively, thus improving the reliability of the test results.

[0022] Alternatively, the hammer block may be cylindrical, and the drop frame may be tubular.

[0023] The cylindrical hammer block, in conjunction with the tubular drop frame, provides highly precise vertical guidance (with a limiting function). Due to the uniform geometry of the circular cross-section, this ensures the hammer block maintains linear motion during descent, reducing any possible offset or sway, thereby improving measurement accuracy.

[0024] Optionally, the device is equipped with a protective casing.

[0025] Protective housings can effectively protect the precision components inside equipment, such as two-way lead screws, rotating rods, moving frames, hammer blocks, and related mechanical and electronic parts, from external environmental factors (such as dust, moisture, gravel, etc.).

[0026] Optionally, the protective shell is provided with a top cover, and the top cover is provided with a handle.

[0027] The handle on the top cover makes the entire device easier to move. Operators can easily lift or move the device using the handle, which is especially important for situations requiring frequent relocation of test sites.

[0028] Optionally, the protective shell may have graduations on its side.

[0029] Operators can directly monitor the position of the moving frame or hammer block in real time via the scale on the side of the protective housing. This allows them to understand the status of critical components without opening the housing, improving operational efficiency. The scale provides an intuitive measurement standard, helping operators to adjust the position of the moving frame or hammer block more precisely. This is especially important for applications requiring high-precision positioning, helping to reduce human error and ensure consistency and accuracy in every test.

[0030] Beneficial effects

[0031] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0032] The technical solution provided by this utility model reduces the need for manual intervention and improves the convenience of equipment operation and testing efficiency. Furthermore, the increased level of automation also helps to improve the consistency and accuracy of test results. Attached Figure Description

[0033] Figure 1 A schematic diagram of the overall structure of a highway pavement rebound deflection value testing device proposed for an embodiment of this utility model;

[0034] Figure 2 A schematic diagram of the internal structure of a highway pavement rebound deflection value testing device proposed for an embodiment of this utility model;

[0035] Figure 3A schematic diagram of the hammer block position of a highway pavement rebound deflection value testing device proposed for an embodiment of this utility model;

[0036] Figure 4 An enlarged schematic diagram at point A of a highway pavement rebound deflection value detection device proposed as an embodiment of this utility model;

[0037] Figure 5 A schematic diagram of the ratchet and pawl structure of a highway pavement rebound deflection value testing device proposed for an embodiment of this utility model;

[0038] 1. Protective shell; 2. Crossbeam; 3. Motor; 4. Two-way lead screw; 5. Moving frame; 6. Support base; 7. Electromagnet; 8. Magnetic block; 9. Hammering block; 10. Drop frame; 11. Rotating rod; 12. Spiral block; 13. Through slot; 14. Connecting rod; 15. Protective plate; 16. Insert post; 17. Pull rod; 18. Limiting ring; 19. Spring; 20. Pointer; 21. Slide groove; 22. Scale; 23. Top cover; 24. Handle; 25. Ratchet; 26. Pawl. Detailed Implementation

[0039] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0040] Example 1

[0041] Combined with appendix Figures 2-3 A road surface rebound deflection value testing device includes a bidirectional lead screw 4 and a rotating rod 11, both connected to a crossbeam 2. The bidirectional lead screw 4 and the rotating rod 11 are arranged in parallel. A movable frame 5 is movably connected to the bidirectional lead screw 4 and the rotating rod 11. One end of the movable frame 5 is threaded to the bidirectional lead screw 4, and the other end of the movable frame 5 is slidably connected to the rotating rod 11 through a through groove 13. The rotating rod 11 is provided with a spiral block 12 that rotates with the through groove 13. A hammer block 9 is fixedly connected to the bottom of the movable frame 5. The hammer block 9 slides vertically along a drop frame 10. A protective plate 15 is provided at the bottom of the drop frame 10. The protective plate 15 is fixedly connected to the rotating rod 11 and controlled by the rotation of the rotating rod 11.

[0042] Combined with appendix Figure 1 The equipment is equipped with a protective shell 1. The protective shell 1 is equipped with a top cover 23, and the top cover 23 is equipped with a handle 24. The protective shell 1 is equipped with a scale 22 on its side.

[0043] Combined with appendix Figure 2A crossbeam 2 is connected to the middle of the top side of the inner side of the protective shell 1. A motor 3 is connected to the top right side of the crossbeam 2. The motor 3 is located at the top right side of the crossbeam 2. A double-acting lead screw 4 is connected to the drive end of the motor 3. A movable frame 5 is connected to the outside of the double-acting lead screw 4. A support base 6 is connected to the middle of the outside of the movable frame 5. An electromagnet 7 is connected to the bottom of the support base 6. A magnetic block 8 is connected to the bottom side of the electromagnet 7. A hammering block 9 is connected to the bottom side of the magnetic block 8. A drop frame 10 is connected to the outside of the hammering block 9. The bottom end of the drop frame 10 is connected to the inner wall of the protective shell 1. The hammering block 9 is cylindrical, and the drop frame 10 is tubular. The hammering block 9 is nested inside the drop frame 10 and slidably connected. The shapes of the hammering block 9 and the drop frame 10 are adapted to each other.

[0044] Combined with appendix Figure 2 The movable frame 5 has a rotating rod 11 connected to the left side inside, and a spiral block 12 connected to the top outer side of the rotating rod 11. The spiral block 12 is located on the lower left side of the crossbeam 2. A through groove 13 is provided inside the movable frame 5 on the side near the rotating rod 11. The through groove 13 and the spiral block 12 are set accordingly.

[0045] Combined with appendix Figures 2-4 A ratchet 25 is connected to the bottom outer side of the rotating rod 11. A pawl 26 is provided on the outer side of the ratchet 25, and a connecting rod 14 is provided on the outer side of the pawl 26. One end of the connecting rod 14 is connected to the bottom side of the rotating rod 11. The protective plate 15 is fixed to the rotating rod 11 through the connecting rod 14. A pull rod 17 is provided at the end of the connecting rod 14. The pull rod 17 is elastically telescopic and has a pin 16 at its end. The end of the connecting rod 14 has a slot, and the pin 16 mates with the slot. A limiting ring 18 is provided at the tail of the pin 16. A spring 19 is connected to the limiting ring 18. The other end of the spring 19 is connected to a fixed structure. The other end of the pull rod 17 has an extra section.

[0046] The other end of the connecting rod 14 is connected to a protective plate 15. A pull rod 17 is slidably connected to one side of the bottom of the protective shell 1. A plug 16 is connected to the side of the pull rod 17 near the connecting rod 14. A limit ring 18 is connected at the intersection of the plug 16 and the pull rod 17. One end of a spring 19 is connected to the side of the limit ring 18 away from the connecting rod 14. The other end of the spring 19 is connected to the inner wall of the protective shell 1. A slot is provided at the rear of the side of the connecting rod 14 near the plug 16. The slot and the plug 16 are correspondingly set.

[0047] When the movable frame 5 rises to its highest point, that is, after the connecting rod 14 drives the protective plate 15 to rotate to its maximum angle, the insert 16 enters the slot on the connecting rod 14 through the spring 19 to complete the fixation. After completion, the insert 16 is disengaged from the slot by the outward pull rod 17, and the protective plate 15 on the connecting rod 14 can be manually reset.

[0048] The movable frame 5 has a pointer 20 at its end, and the pointer 20 is equipped with a scale 22. The protective shell 1 has sliding grooves 21 on both the left and right sides, which are correspondingly set to the movable frame 5. Scales 22 are set on both the front and rear sides of the two sliding grooves 21, and the height of the scales 22 is the same as the height of the sliding grooves 21. Pointers 20 are connected to the outer sides of both the left and right ends of the movable frame 5, and the pointers 20 are correspondingly set to the scales 22. The height of the movable frame 5 is determined by the pointers 20 and the scales 22 on both sides, thus indicating the height of the hammer block 9, making it convenient for the user to know the height of the hammer block 9.

[0049] The top of the protective shell 1 is connected to a top cover 23, and a handle 24 is connected to the middle of the top of the top cover 23.

[0050] Working principle:

[0051] In use, the device is moved to the test point, and the starter motor 3 drives the bidirectional lead screw 4 to rotate, causing the moving frame 5 to rise as a whole. At this time, the through slot 13 on the moving frame 5 contacts the spiral block 12 on the rotating rod 11. Due to the spiral arrangement of the spiral block 12, the moving frame 5, during its vertical ascent, drives the rotating rod 11 to rotate, causing the connecting rod 14 below to rotate synchronously with the protective plate 15, thus disengaging the protective plate 15 from under the drop frame 10. When the moving frame 5 rises to its highest point, that is, after the connecting rod 14 drives the protective plate 15 to rotate to its maximum angle, the insert 16 enters the slot on the connecting rod 14 through the spring 19, completing the fixation. At this time, the motor 3 rotates in the reverse direction, causing the moving frame 5 to descend. Then, through the ratchet 25 and pawl 26, the rotating rod 11 rotates in the reverse direction to reset. With the position of connecting rod 14 unchanged, the reverse rotation of motor 3 drives the entire moving frame 5 to move, thereby changing the height of the hammer block 9 on the moving frame 5 as needed. The height of the moving frame 5 is determined by the pointers 20 and scale 22 on both sides, thus determining the height of the hammer block 9. Then, the electromagnet 7 is de-energized, causing the hammer block 9 on the magnetic block 8 to fall along the drop frame 10 to hammer the ground. The ground rebound deflection value is detected by the sensors around the ground. The drop frame 10 is designed to prevent the hammer block 9 from falling and shifting. After completion, the moving frame 5 descends, the electromagnet 7 is energized, and the hammer block 9 is re-attached and fixed for the next use. After completion, the insertion post 16 is disengaged from the slot by the outward pull rod 17, and the protective plate 15 on the connecting rod 14 can be manually reset. Thus, the entire process is completed.

[0052] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for detecting the rebound deflection value of highway pavement, characterized in that, The device includes a bidirectional lead screw and a rotating rod, both connected to a crossbeam. The bidirectional lead screw and the rotating rod are arranged in parallel. A movable frame is movably connected to the bidirectional lead screw and the rotating rod. One end of the movable frame is threaded to the bidirectional lead screw, and the other end of the movable frame is slidably connected to the rotating rod through a through groove. The rotating rod is provided with a helical block that rotatably engages with the through groove. A hammer block is fixedly connected to the bottom of the movable frame and slides vertically along the drop frame. A protective plate is provided at the bottom of the drop frame and is fixedly connected to the rotating rod and controlled by the rotation of the rotating rod.

2. The highway pavement rebound deflection value testing device according to claim 1, characterized in that, The protective plate is fixed to the rotating rod by a connecting rod. The end of the connecting rod is equipped with a pull rod, which is elastically retractable and has a post at its end. The end of the connecting rod is equipped with a slot, and the post mates with the slot.

3. The highway pavement rebound deflection value testing device according to claim 2, characterized in that, The end of the insertion post is provided with a limiting ring, the limiting ring is connected to a spring, the other end of the spring is connected to a fixed structure, and the other end of the pull rod has an extra section of volume.

4. The highway pavement rebound deflection value testing device according to claim 1, characterized in that, The bidirectional lead screw is connected to a motor.

5. The highway pavement rebound deflection value testing device according to claim 1, characterized in that, The end of the movable frame is equipped with a pointer, and the pointer is equipped with a scale.

6. The highway pavement rebound deflection value testing device according to claim 1, characterized in that, The hammer block is nested inside the drop frame and slidably connected, and the shape of the hammer block is adapted to the drop frame.

7. The highway pavement rebound deflection value testing device according to claim 6, characterized in that, The hammer block is cylindrical, and the drop frame is tubular.

8. A highway pavement rebound deflection value testing device according to any one of claims 1 to 7, characterized in that, The equipment is equipped with a protective casing.

9. A highway pavement rebound deflection value testing device according to claim 8, characterized in that, The protective shell is provided with a top cover, and the top cover is provided with a handle.

10. A highway pavement rebound deflection value testing device according to claim 8, characterized in that, The protective shell has graduations on its side.

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