A dynamic modulus tester

Abstract

The utility model discloses a kind of dynamic deformation modulus testers, including drop hammer, guide rod and damping part, guide rod is vertically arranged, drop hammer is slidably connected on guide rod, damping part is fixedly connected at the bottom end of guide rod. Load plate, detachably connected at the bottom end of damping part. Bracket, bracket includes vertically arranged first support plate and second support plate, first support plate and second support plate top end between fixedly connected with crosspiece, crosspiece is detachably connected with the top end of guide rod. Automatic locking release assembly, fixedly connected on the inner wall of first support plate, for automatically locking and releasing drop hammer. Lifting assembly, for automatically lifting drop hammer. Controller, fixedly connected on the outer wall of first support plate, automatic locking release assembly and lifting assembly are electrically connected with controller. The utility model can automatically lift hammer and release drop hammer, reduce the working intensity of staff, eliminate manual operation error, improve the accuracy of test result.

Description

Technical Field

[0001] This utility model relates to the field of road engineering testing technology, and in particular to a dynamic deformation modulus tester. Background Technology

[0002] The dynamic deformation modulus tester is a portable device used for quickly testing the mechanical properties of geotechnical structures such as roadbeds and foundations. It applies instantaneous loads by dropping a hammer, measures the settlement deformation of the soil under dynamic loads, and then calculates the dynamic deformation modulus (Evd value). This parameter effectively reflects the stiffness and bearing capacity of the soil under impact loads.

[0003] Existing dynamic deformation modulus testers typically require multiple repeated impact tests on the same location during use, necessitating manual lifting, fixing, and releasing of the drop hammer each time. For example, utility model patent CN220704606U discloses an Evd dynamic deformation modulus tester, which includes: a pressure stabilizing platform and a main rod. A pair of grip handles are fixedly connected to the top of the pressure stabilizing platform, and a connecting recess is fixedly connected to the top of the pressure stabilizing platform. A dust removal mechanism is provided inside the connecting recess. A pair of limiting plates are fixedly connected to the side wall of the main rod, and a buffer mechanism is provided at the bottom of the main rod.

[0004] While the aforementioned dynamic modulus tester can utilize the gravity of the falling hammer to drive the dust removal mechanism for cleaning the main rod, the lifting, fixing, and releasing of the falling hammer requires operators to repeatedly perform actions such as lifting, positioning, and unlocking, which increases labor intensity over extended periods. Furthermore, manual operation can easily lead to slight deviations in the release height and posture of the impact hammer, affecting the accuracy and stability of the test data and introducing human error.

[0005] Therefore, it is necessary to develop a dynamic deformation modulus tester to address the aforementioned shortcomings. Utility Model Content

[0006] The purpose of this invention is to provide a dynamic deformation modulus tester that can automatically lift and release the drop hammer, reducing the workload of workers, eliminating human error, and improving the accuracy of test results.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This utility model discloses a dynamic deformation modulus tester, comprising a loading assembly including a drop hammer, a guide rod, and a damping element. The guide rod is vertically arranged, the drop hammer is slidably connected to the guide rod, and the damping element is fixedly connected to the bottom end of the guide rod. A load plate is detachably connected to the bottom end of the damping element. A support frame includes a vertically arranged first support plate and a second support plate, with a horizontal plate fixedly connected between the top ends of the first and second support plates. The horizontal plate is detachably connected to the top end of the guide rod. An automatic locking and releasing assembly is fixedly connected to the inner wall of the first support plate for automatically locking and releasing the drop hammer. A lifting assembly is used to automatically lift the drop hammer. A controller is fixedly connected to the outer wall of the first support plate, and both the automatic locking and releasing assembly and the lifting assembly are electrically connected to the controller.

[0008] Furthermore, the automatic locking and releasing assembly includes a mounting box, which is fixedly connected to the inner wall of the top of the first support plate. A telescopic component is fixedly connected inside the mounting box, and the telescopic end of the component penetrates the side wall of the mounting box and is fixedly connected to a horizontally positioned limiting plate. A limiting ring that mates with the limiting plate is fixedly connected to the top of the drop hammer. The telescopic component is electrically connected to the controller.

[0009] Furthermore, connecting rods are fixedly connected to both ends of the side wall of the limiting plate, and the connecting rods pass through the side wall of the mounting box and are slidably connected thereto.

[0010] Furthermore, the lifting assembly includes a connecting rope and a fixed pulley, the fixed pulley being fixedly connected to the bottom surface of the horizontal plate. A slider is slidably connected to the second support plate, and two parallel, spaced-apart connecting plates are fixedly connected to the side wall of the slider facing the first support plate. A first movable pulley is rotatably connected between the two connecting plates. One end of the connecting rope is fixedly connected to the top surface of the drop hammer, and the other end passes sequentially around the fixed pulley and the first movable pulley and is fixedly connected to the bottom surface of the horizontal plate. A driving component is fixedly connected to the second support plate, the driving component being used to drive the slider to move vertically.

[0011] Furthermore, the driving component includes a mounting column, which is vertically fixed to the outer wall of the second support plate. A vertically extending groove is formed through the mounting column, and a lead screw is rotatably connected within the groove. The slider is threaded onto the lead screw and slidably connected to the groove. A motor is fixedly connected to the top surface of the mounting column, and the motor output is coaxially fixedly connected to the lead screw. A vertically extending slot communicating with the groove is formed on the inner wall of the second support plate, and two connecting plates pass through the slot and are slidably connected thereto. The motor is electrically connected to the controller.

[0012] Furthermore, a second movable pulley is rotatably connected between the two connecting plates, with a gap between the first and second movable pulleys, and the connecting rope passes between the first and second movable pulleys.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This invention features a lifting component and an automatic release locking component. The lifting component, controlled by a controller, automates the lifting of the drop hammer, while the automatic locking and release component locks and releases the hammer, eliminating the need for manual lifting and releasing. This reduces repetitive labor for operators, making it suitable for testing scenarios involving repeated impacts at the same location, and improving operational convenience and comfort. Furthermore, it eliminates experimental errors caused by manual operation, enhancing the stability and accuracy of test results. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a three-dimensional structural diagram of the dynamic deformation modulus tester of this utility model; Figure 2 For Figure 1 A magnified view of part A in the middle; Figure 3 for Figure 1 A magnified view of part B in the middle section; Figure 4 This is a three-dimensional structural schematic diagram of the dynamic deformation modulus tester of this utility model from another perspective; Figure 5 This is a three-dimensional structural schematic diagram of the dynamic deformation modulus tester of this utility model from another perspective.

[0016] Explanation of reference numerals in the attached drawings: 1. Drop hammer; 2. Guide rod; 3. Damping component; 4. Load plate; 5. First support plate; 6. Second support plate; 7. Horizontal plate; 8. Controller; 9. Mounting box; 10. Telescopic component; 11. Limiting plate; 12. Limiting ring; 13. Connecting rod; 14. Connecting rope; 15. Fixed pulley; 16. Sliding block; 17. Connecting plate; 18. First movable pulley; 19. Mounting column; 20. Slide groove; 21. Lead screw; 22. Motor; 23. Strip hole; 24. Second movable pulley. Detailed Implementation

[0017] The core of this invention is to provide a dynamic deformation modulus tester that can automatically lift and release the drop hammer, reducing the workload of workers, eliminating human error, and improving the accuracy of test results.

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. 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.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] It is understood that all electrical components mentioned in this article are electrically connected to the main controller and power supply, and all electrical components mentioned in this article are conventional and known devices. This application will not elaborate further. The main controller can be a conventional and known device such as a computer that performs control. The control circuit of the main controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices. Therefore, this utility model will not explain the control method and circuit connection in detail. At the same time, all parts not described in detail in this utility model are common technologies known to those skilled in the art.

[0021] In one specific embodiment of this utility model, such as Figure 1 As shown, the system includes: a loading assembly comprising a drop hammer 1, a guide rod 2, and a damping element 3. The guide rod 2 is vertically positioned, the drop hammer 1 is slidably connected to the guide rod 2, and the damping element 3 is fixedly connected to the bottom end of the guide rod 2. A load plate 4 is detachably connected to the bottom end of the damping element 3. A support frame comprising a vertically positioned first support plate 5 and a second support plate 6. A horizontal plate 7 is fixedly connected between the top ends of the first support plate 5 and the second support plate 6, and the horizontal plate 7 is detachably connected to the top end of the guide rod 2. An automatic locking and releasing assembly is fixedly connected to the inner wall of the first support plate 5 for automatically locking and releasing the drop hammer 1. A lifting assembly is used to automatically lift the drop hammer 1. A controller 8 is fixedly connected to the outer wall of the first support plate 5, and both the automatic locking and releasing assembly and the lifting assembly are electrically connected to the controller 8.

[0022] Specifically, the drop hammer 1 is a cylindrical structure with a weight of 10kg. It has a guide hole in its center, which fits with the guide rod 2 with a clearance, allowing the drop hammer 1 to slide along the guide rod 2. A flange is welded to the top of the guide rod 2 to mate with the horizontal plate 7, and the two are detachably connected by bolts. The damping component 3 is a butterfly spring assembly. The load plate 4 includes a circular steel plate, a force sensor, and a vibration sensor; its specific structure is existing technology and will not be described further. It also includes a settlement measuring instrument and a Bluetooth miniature printer. The electronic settlement measuring instrument collects deflection data, processes it, and automatically calculates the dynamic deformation modulus Evd value. The settlement measuring instrument is connected to the sensor on the load plate via a cable. The controller 8 includes a PLC control module, a touch screen, and operation buttons; its connection and control methods with the various components are existing technology and will not be described further.

[0023] In one specific embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the automatic locking and releasing assembly includes a mounting box 9, which is fixedly connected to the inner wall of the top of the first support plate 5. A telescopic component 10 is fixedly connected inside the mounting box 9, and the telescopic end of the telescopic component 10 penetrates the side wall of the mounting box 9 and is fixedly connected to a horizontally set limiting plate 11. A limiting ring 12 that cooperates with the limiting plate 11 is fixedly connected to the top of the drop hammer 1. The telescopic component 10 is electrically connected to the controller 8.

[0024] The telescopic component 10 specifically employs an electric push rod. When the drop hammer 1 is raised to a set height, the controller 8 controls the telescopic end of the telescopic component 10 to extend, causing the limiting plate 11 to move towards the drop hammer 1 until the limiting plate 11 moves directly below the limiting ring 12. At this point, the top surface of the limiting plate 11 contacts the bottom surface of the limiting ring 12, thus locking the drop hammer 1. During the impact test, the controller 8 controls the telescopic end of the telescopic component 10 to shorten, causing the limiting plate 11 to move away from the drop hammer 1 until it detaches from the limiting ring 12. The drop hammer 1 then falls freely along the guide rod 2 under the influence of gravity.

[0025] Specifically, connecting rods 13 are fixedly connected to both ends of the side wall of the limiting plate 11. The connecting rods 13 penetrate the side wall of the mounting box 9 and are slidably connected to it. The two connecting rods 13 can limit and guide the two ends of the limiting plate 11 to prevent the limiting plate 11 from deflecting during the extension and retraction process.

[0026] In one specific embodiment of this utility model, such as Figures 1-5As shown, the lifting assembly includes a connecting rope 14 and a fixed pulley 15, with the fixed pulley 15 fixedly connected to the bottom surface of the horizontal plate 7. A slider 16 is slidably connected to the second support plate 6, and two parallel and spaced connecting plates 17 are fixedly connected to the side wall of the slider 16 facing the first support plate 5. A first movable pulley 18 is rotatably connected between the two connecting plates 17. One end of the connecting rope 14 is fixedly connected to the top surface of the drop hammer 1, and the other end passes sequentially around the fixed pulley 15 and the first movable pulley 18 and is fixedly connected to the bottom surface of the horizontal plate 7. A driving component is fixedly connected to the second support plate 6, which drives the slider 16 to move vertically.

[0027] The connecting rope 14 is made of stainless steel wire rope with a PVC wear-resistant coating. One end is fixed to the lifting ring welded to the top of the drop hammer 1 by a rope clamp, and the other end passes through the groove of the fixed pulley 15, through the gap between the first movable pulley 18 and the second movable pulley 24, and is finally fixed to the wire rope fixing seat on the bottom surface of the horizontal plate 7 by bolts. The connecting rope 14 is wound around to ensure that when the slider 16 moves down, it drives the first movable pulley 18 to move down, thereby pulling the connecting rope 14 to lift the drop hammer 1.

[0028] Specifically, the driving component includes a mounting post 19, which is vertically fixed to the outer wall of the second support plate 6. A vertically extending groove 20 is formed through the mounting post 19, within which a lead screw 21 is rotatably connected. A slider 16 is threaded onto the lead screw 21 and slidably connected to the groove 20. A motor 22, specifically a servo motor, is fixedly connected to the top surface of the mounting post 19, and its output end is coaxially fixedly connected to the lead screw 21. A vertically extending slot 23 communicating with the groove 20 is formed on the inner wall of the second support plate 6, through which two connecting plates 17 pass and slidably connect. The motor 22 is electrically connected to the controller 8.

[0029] The motor 22 drives the lead screw 21 to rotate, and the screw drive drives the slider 16 to move linearly in the groove 20.

[0030] Specifically, a second movable pulley 24 is rotatably connected between the two connecting plates 17, and a gap is set between the first movable pulley 18 and the second movable pulley 24, and the connecting rope 14 passes between the first movable pulley 18 and the second movable pulley 24.

[0031] By setting the second movable pulley 24, the connecting rope 14 can be restricted between it and the first movable pulley 18. During the upward movement of the slider 16, the connecting rope 14 is prevented from detaching from the first movable pulley 18, so that when the slider 16 moves downward, the connecting rope 14 cannot be re-attached to the first movable pulley 18.

[0032] Working principle of this utility model: When using the dynamic deformation modulus tester, the device is placed on the test site. The controller 8 controls the motor 22 to start, and the motor 22 drives the lead screw 21 to rotate. Through the threaded transmission, the slider 16 moves vertically downward along the slide groove 20. During the downward movement of the slider 16, the first movable pulley 18 and the second movable pulley 24 move downward synchronously. Through the fixed pulley 15, the connecting rope 14 is pulled to lift the drop hammer 1 along the guide rod 2.

[0033] When the drop hammer 1 rises to the preset height, the controller 8 receives the position detection signal (which can be achieved through a motor encoder or an additional position sensor, not detailed but in accordance with conventional control logic), and then controls the motor 22 to stop running and controls the telescopic end of the telescopic component 10 to extend. The telescopic end of the telescopic component 10 drives the limiting plate 11 to move towards the drop hammer 1 until the top surface of the limiting plate 11 is in contact with the bottom surface of the limiting ring 12 of the drop hammer 1, thereby achieving the support and locking of the drop hammer 1.

[0034] Then control the motor 22 to reverse, which drives the lead screw 21 to reverse, and through the threaded transmission, the slider 16 moves vertically upward along the slide groove 20. During the upward movement of the slider 16, the first movable pulley 18 and the second movable pulley 24 move upward synchronously, releasing the clamping and fixing of the connecting rope by the first movable pulley 18.

[0035] Then, during the impact test, the telescopic end of the control telescopic component 10 is shortened, the limit plate 11 is released from the limit ring 12 and unlocked, and the drop hammer 1 falls freely along the guide rod 2 under the action of gravity. After being buffered by the damping component 3, the impact force is transmitted to the load plate 4 at the bottom. During the impact, the force sensor on the load plate 4 collects the impact load data in real time, the vibration sensor captures the vibration response signal, and the settlement measuring instrument collects the site deflection data simultaneously.

[0036] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0037] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A dynamic deformation modulus tester, characterized in that: include: The loading component includes a drop hammer (1), a guide rod (2) and a damping element (3). The guide rod (2) is vertically arranged, the drop hammer (1) is slidably connected to the guide rod (2), and the damping element (3) is fixedly connected to the bottom end of the guide rod (2). The load plate (4) is detachably connected to the bottom end of the damping member (3); The bracket includes a first support plate (5) and a second support plate (6) arranged vertically. A horizontal plate (7) is fixedly connected between the top ends of the first support plate (5) and the second support plate (6). The horizontal plate (7) is detachably connected to the top end of the guide rod (2). An automatic locking and releasing assembly is fixedly connected to the inner wall of the first support plate (5) and is used to automatically lock and release the drop hammer (1); A lifting component is used to automatically lift the drop hammer (1); The controller (8) is fixedly connected to the outer wall of the first support plate (5), and the automatic locking release component and the lifting component are both electrically connected to the controller (8).

2. The dynamic deformation modulus tester according to claim 1, characterized in that: The automatic locking and releasing assembly includes a mounting box (9), which is fixedly connected to the inner wall of the top of the first support plate (5). A telescopic component (10) is fixedly connected inside the mounting box (9). The telescopic end of the telescopic component (10) passes through the side wall of the mounting box (9) and is fixedly connected to a horizontally set limiting plate (11). A limiting ring (12) that cooperates with the limiting plate (11) is fixedly connected to the top of the drop hammer (1). The telescopic component (10) is electrically connected to the controller (8).

3. The dynamic deformation modulus tester according to claim 2, characterized in that: The two ends of the side wall of the limiting plate (11) are fixedly connected to the connecting rod (13), which passes through the side wall of the mounting box (9) and is slidably connected to it.

4. The dynamic deformation modulus tester according to claim 1, characterized in that: The lifting assembly includes a connecting rope (14) and a fixed pulley (15), the fixed pulley (15) being fixedly connected to the bottom surface of the horizontal plate (7); a slider (16) is slidably connected to the second support plate (6), and two parallel and spaced connecting plates (17) are fixedly connected to the side wall of the slider (16) facing the first support plate (5), and a first movable pulley (18) is rotatably connected between the two connecting plates (17); one end of the connecting rope (14) is fixedly connected to the top surface of the drop hammer (1), and the other end passes around the fixed pulley (15) and the first movable pulley (18) in sequence and is fixedly connected to the bottom surface of the horizontal plate (7); a driving component is fixedly connected to the second support plate (6), the driving component being used to drive the slider (16) to move in the vertical direction.

5. The dynamic deformation modulus tester according to claim 4, characterized in that: The driving component includes a mounting column (19), which is vertically fixed to the outer wall of the second support plate (6). The mounting column (19) has a vertically penetrating groove (20), and a lead screw (21) is rotatably connected in the groove (20). The slider (16) is threaded onto the lead screw (21) and slidably connected to the groove (20). A motor (22) is fixedly connected to the top surface of the mounting column (19), and the output end of the motor (22) is coaxially fixedly connected to the lead screw (21). A strip hole (23) communicating with the groove (20) is vertically opened on the inner wall of the second support plate (6), and two connecting plates (17) penetrate the strip hole (23) and are slidably connected to it. The motor (22) is electrically connected to the controller (8).

6. The dynamic deformation modulus tester according to claim 5, characterized in that: A second movable pulley (24) is rotatably connected between the two connecting plates (17). A gap is provided between the first movable pulley (18) and the second movable pulley (24). The connecting rope (14) passes between the first movable pulley (18) and the second movable pulley (24).

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