A vehicle-mounted falling weight deflectometer

Abstract

This utility model relates to the technical field of vehicle-mounted falling weight deflectometers and discloses a vehicle-mounted falling weight deflectometer, including a support frame. An automatic detection and cleaning mechanism is provided on the outer side of the support frame. The automatic detection and cleaning mechanism includes a movable storage platform. Two hydraulic cylinders are fixedly connected to the outer surface of the support frame, and the extension end of each hydraulic cylinder is fixedly connected to the outer surface of the movable storage platform. The outer surface of the movable storage platform is slidably connected to the interior of the support frame. This vehicle-mounted falling weight deflectometer, by incorporating the automatic detection and cleaning mechanism, can automatically detect and clean impurities on the outer surface of the falling weight. Simultaneously, it can precisely adjust the height and overall weight of the falling weight according to experimental requirements, not only improving the applicability of the device but also enhancing the accuracy of the experiments. It effectively prevents impurities from adhering to the surface of the falling weight, affecting the depth of subsequent falling weight experiments, and thus reducing the effectiveness of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle-mounted falling weight deflectometers, specifically a vehicle-mounted falling weight deflectometer. Background Technology

[0002] A vehicle-mounted falling weight deflectometer is a testing device used to measure the deflection of road surfaces or base courses. It is widely used in quality inspection for road construction and maintenance. This instrument simulates traffic loads by applying a certain impact force to the road surface and measuring the deformation (deflection) caused by the force. The vehicle-mounted design allows for easy installation on vehicles for mobile testing, improving work efficiency and convenience. Analysis of the deflection values ​​can assess the road surface's load-bearing capacity, density, and stability, providing data support for road maintenance and reinforcement.

[0003] The existing utility model with authorization announcement number CN209387431U discloses a vehicle-mounted falling weight deflectometer, including a portal-shaped vertical frame, a weight, and a support plate. The portal-shaped vertical frame has a guide rail at its lower end and a lifting plate cylinder fixed at its upper end. The upper end of the support plate is fixed to the bottom of the horizontal plate of an H-shaped connecting plate. Guide slides are fixed to the outer sides of the two vertical plates of the connecting plate, and the tops of the two vertical plates are connected to the movable end of the lifting plate cylinder. The guide slides can slide up and down along the guide rail. A locking cylinder is located at the middle height of the outer side of the vertical frame, with its lower end fixed to a locking plate. The locking plate and the vertical frame are rotatably connected. A lifting hammer cylinder with the weight attached is fixed to the upper surface of the horizontal plate of the connecting plate, and the weight can slide up and down along the outer surface of the lifting hammer cylinder. This utility model uses an automatic locking cylinder and a guide rail on the frame, integrating the locking function of the equipment into the frame.

[0004] Although the present invention has the advantages of high speed, low energy consumption, large lifting force, long service life, and stable performance, the above technical solution has the following disadvantages in use: First, the weight of the falling hammer is always a fixed value and cannot be adjusted according to the experimental site and materials. At the same time, the extension and retraction height of the device cannot be precisely controlled during use. Second, after the hammer falls and interacts with the material, impurities may adhere to the surface of the hammer. The current device cannot detect whether there are impurities on the surface of the hammer. If the impurities are not cleaned, it will easily affect the accuracy of the data in the next experiment, thereby reducing the effectiveness of the device.

[0005] Therefore, those skilled in the art have provided a vehicle-mounted falling weight deflectometer to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide a vehicle-mounted falling weight deflectometer to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A vehicle-mounted falling weight deflectometer includes a support frame with an automatic detection and cleaning mechanism on its outer side. The automatic detection and cleaning mechanism includes a movable storage platform. Two hydraulic cylinders are fixedly connected to the outer surface of the support frame, with the extension end of each cylinder fixedly connected to the outer surface of the movable storage platform. The outer surface of the movable storage platform is slidably connected to the interior of the support frame. A falling weight body is fixedly connected to the bottom surface of the movable storage platform. Two connecting plates are fixedly connected to the inner wall of the support frame, with the outer surface of the falling weight body slidably connected to the interior of the connecting plates. Two vacuum negative pressure pumps are fixedly connected to the inner wall of the support frame, with the input end of each vacuum negative pressure pump fixedly connected to a suction hood. A gear and a gear are rotatably connected to the inner wall of the other connecting plate, with the outer surface of the gear meshing with the outer surface of the gear. Two arc-shaped blocks are fixedly connected to the upper surface of the gear, with an infrared ranging sensor fixedly connected to the outer surface of each arc-shaped block. A drive motor is located below the movable storage platform, with the power output end of the drive motor fixedly connected to the top of the gear. A controller body is fixedly connected to the left side of the support frame.

[0009] As a further improvement of this utility model: a fixing ring is fixedly connected to the outer surface of the drop hammer body, and the top end of the fixing ring is fixedly connected to the bottom surface of the mobile storage platform.

[0010] As a further improvement of this utility model: a fixing frame is fixedly connected to the outer surface of the controller body, and the right side of the fixing frame is fixedly connected to the left side of the support frame.

[0011] As a further embodiment of this utility model: an L-shaped plate is fixedly connected to the outer surface of the drive motor, and the bottom surface of the L-shaped plate is fixedly connected to the upper surface of another connecting plate.

[0012] As a further improvement of this utility model: each of the vacuum negative pressure pumps has a fixing block fixedly connected to its outer surface, and the bottom surface of each fixing block is fixedly connected to the upper surface of the connecting plate.

[0013] As a further improvement of this utility model: a reinforcing ring is fixedly connected to the outer surface of each infrared ranging sensor, and the outer surface of each reinforcing ring is fixedly connected to the outer surface of the arc-shaped block.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention features an automatic detection and cleaning mechanism that can automatically detect and clean impurities on the outer surface of the drop hammer. It can also precisely adjust the height and overall weight of the drop hammer according to experimental requirements, thus expanding the applicability of the device and improving the accuracy of experiments. This effectively prevents impurities from adhering to the surface of the drop hammer and affecting the depth of subsequent drop hammer experiments, thereby reducing the device's effectiveness. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a vehicle-mounted falling weight deflectometer;

[0017] Figure 2 A schematic diagram of the three-dimensional structure of a hydraulic cylinder in a vehicle-mounted falling weight deflectometer;

[0018] Figure 3 A schematic diagram of the three-dimensional structure of the support frame in a vehicle-mounted falling weight deflectometer;

[0019] Figure 4 A schematic diagram of the three-dimensional structure of an L-shaped plate in a vehicle-mounted falling weight deflectometer;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the toothed disc in a vehicle-mounted falling weight deflectometer.

[0021] In the diagram: 1. Support frame; 2. Automatic detection and cleaning mechanism; 201. Mobile storage platform; 202. Hydraulic cylinder; 203. Controller body; 204. Drop hammer body; 205. Gear disc; 206. Vacuum negative pressure pump; 207. Drive motor; 208. Gear; 209. Suction cover; 210. Connecting plate; 211. Arc block; 212. Infrared ranging sensor; 3. Fixing ring; 4. Fixing frame; 5. Reinforcing ring; 6. Fixing block; 7. L-shaped plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1

[0024] Please see Figure 1-5A vehicle-mounted falling weight deflectometer includes a support frame 1, with an automatic detection and cleaning mechanism 2 installed on the outer side of the support frame 1. The automatic detection and cleaning mechanism 2 includes a movable storage platform 201. Two hydraulic cylinders 202 are fixedly connected to the outer surface of the support frame 1, and the telescopic end of each hydraulic cylinder 202 is fixedly connected to the outer surface of the movable storage platform 201. The outer surface of the movable storage platform 201 is slidably connected to the interior of the support frame 1. A falling weight body 204 is fixedly connected to the bottom surface of the movable storage platform 201. Two connecting plates 210 are fixedly connected to the inner wall of the support frame 1, and the outer surface of the falling weight body 204 is slidably connected to the interior of the connecting plates 210. The inner wall of the support frame 1 is fixedly connected to the falling weight body 204. Two vacuum negative pressure pumps 206 are connected, and the input end of each vacuum negative pressure pump 206 is fixedly connected to a suction cover 209. The inner wall of another connecting plate 210 is rotatably connected to a gear 205 and a gear 208. The outer surface of the gear 208 meshes with the outer surface of the gear 205. Two arc-shaped blocks 211 are fixedly connected to the upper surface of the gear 205. An infrared ranging sensor 212 is fixedly connected to the outer surface of each arc-shaped block 211. A drive motor 207 is set below the mobile storage platform 201. The power output end of the drive motor 207 is fixedly connected to the top of the gear 208. The controller body 203 is fixedly connected to the left side of the support frame 1.

[0025] Example 2

[0026] Please see Figure 1-5 A fixing ring 3 is fixedly connected to the outer surface of the drop hammer body 204. The top of the fixing ring 3 is fixedly connected to the bottom surface of the mobile storage platform 201. The fixing ring 3 can be used to reinforce the connection between the drop hammer body 204 and the mobile storage platform 201, so as to avoid the problem of breakage between the mobile storage platform 201 and the drop hammer body 204, which would affect the use effect of the device.

[0027] A fixing frame 4 is fixedly connected to the outer surface of the controller body 203. The right side of the fixing frame 4 is fixedly connected to the left side of the support frame 1. The fixing frame 4 can fix the controller body 203 and prevent the controller body 203 from shaking during use.

[0028] An L-shaped plate 7 is fixedly connected to the outer surface of the drive motor 207. The bottom surface of the L-shaped plate 7 is fixedly connected to the upper surface of another connecting plate 210. The L-shaped plate 7 can be used to fix the drive motor 207 and prevent the drive motor 207 from shaking during use.

[0029] Each vacuum negative pressure pump 206 has a fixing block 6 fixedly connected to its outer surface. The bottom surface of each fixing block 6 is fixedly connected to the upper surface of the connecting plate 210. The fixing block 6 can be used to reinforce the vacuum negative pressure pump 206 and prevent fluctuations during use.

[0030] Each infrared ranging sensor 212 has a reinforcing ring 5 fixedly connected to its outer surface. The outer surface of each reinforcing ring 5 is fixedly connected to the outer surface of the arc-shaped block 211. The reinforcing ring 5 can reinforce the infrared ranging sensor 212 and prevent it from falling off during use.

[0031] Example 3

[0032] The working principle of this utility model is as follows: In use, first connect the controller body 203, vacuum negative pressure pump 206, drive motor 207, and infrared ranging sensor 212 to the power supply. When using this device, the operator can add appropriate counterweights to the storage port in the mobile storage platform 201 according to the experimental site materials and seal it. Then, according to the experimental requirements, the operator uses the controller body 203 to control the hydraulic cylinder 202 to extend or retract to an appropriate length. Next, the controller body 203 controls the hydraulic cylinder 202 to extend, causing the mobile storage platform 201, the drop hammer body 204, and the counterweights inside the mobile storage platform 201 to move downwards along the inside of the support frame 1. The bottom of the drop hammer body 204 then moves the material downwards. Under heavy pressure, after the experiment is completed, the staff uses the controller body 203 to control the hydraulic cylinder 202 to retract. The retraction of the hydraulic cylinder 202 causes the movable storage platform 201 to slide upward along the inside of the support frame 1. During the upward sliding of the movable storage platform 201 along the inside of the support frame 1, it causes the drop hammer body 204 to reach the outer surface of the gear disk 205. Then, the controller body 203 controls the hydraulic cylinder 202 to stop moving. After that, the controller body 203 controls the drive motor 207 to work. The drive motor 207 drives the gear 208 to rotate under the support of one of the connecting plates 210. The rotation of the gear 208 in turn drives the gear disk 205 to rotate. The rotation of the gear disk 205 in turn drives the arc block 211 and the infrared ranging sensor. 212 revolves around the center of the gear disk 205. The infrared emitter inside the infrared ranging sensor 212 continuously reflects infrared signals towards the outer surface of the drop hammer body 204. These infrared signals are reflected upon the surface of the drop hammer body 204 and received by the receiver inside the infrared ranging sensor 212. This allows for precise measurement of the distance between the surface of the drop hammer body 204 and the infrared ranging sensor 212. This measured distance is compared with the distance between the drop hammer body 204 and the infrared ranging sensor 212 during operation. If the distance is lower than the original data, it indicates that there are impurities on the surface of the drop hammer body 204, requiring cleaning. Simultaneously, a warning light inside the controller body 203 issues a warning. The controller body 203 controls the hydraulic cylinder 202 to operate. The hydraulic cylinder 202 drives the movable storage platform 201 to move upward along the interior of the support frame 1. When the drop hammer body 204 moves to the vacuum negative pressure pump 206, the controller body 203 controls the vacuum negative pressure pump 206 to operate. By creating an environment with a pressure lower than atmospheric pressure, impurities in the air are drawn into the pump with the airflow. Under this negative pressure, particulate matter, liquid, or gaseous impurities in the gas are guided to the pump's filtration system or sedimentation device for separation, thereby achieving the purpose of removing impurities. Through continuous negative pressure suction, the vacuum pump can effectively remove contaminants, maintain the cleanliness and efficient operation of the system, and thus clean impurities from the surface of the drop hammer body 204.This will facilitate the device's continued use in the future, thereby improving the accuracy of data measurements.

[0033] 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 vehicle mounted falling weight deflectometer comprising a support frame (1) characterised in that: An automatic detection and cleaning mechanism (2) is provided on the outside of the support frame (1); the automatic detection and cleaning mechanism (2) includes a mobile storage platform (201), two hydraulic cylinders (202) are fixedly connected to the outer surface of the support frame (1), the telescopic end of each hydraulic cylinder (202) is fixedly connected to the outer surface of the mobile storage platform (201), the outer surface of the mobile storage platform (201) is slidably connected to the inside of the support frame (1), a drop hammer body (204) is fixedly connected to the bottom surface of the mobile storage platform (201), two connecting plates (210) are fixedly connected to the inner wall of the support frame (1), the outer surface of the drop hammer body (204) is slidably connected to the inside of the connecting plate (210), and two vacuum negative pressure pumps are fixedly connected to the inner wall of the support frame (1). (206) Each of the vacuum negative pressure pumps (206) has a suction hood (209) fixedly connected to its input end. The inner wall of the other connecting plate (210) is rotatably connected to a gear (205) and a gear (208). The outer surface of the gear (208) meshes with the outer surface of the gear (205). Two arc-shaped blocks (211) are fixedly connected to the upper surface of the gear (205). An infrared ranging sensor (212) is fixedly connected to the outer surface of each arc-shaped block (211). A drive motor (207) is provided below the mobile storage platform (201). The power output end of the drive motor (207) is fixedly connected to the top of the gear (208). The controller body (203) is fixedly connected to the left side of the support frame (1).

2. A vehicle mounted falling weight deflectometer according to claim 1, characterised in that: A fixing ring (3) is fixedly connected to the outer surface of the drop hammer body (204), and the top of the fixing ring (3) is fixedly connected to the bottom surface of the mobile storage platform (201).

3. The vehicle mounted falling weight deflectometer according to claim 1, wherein: The outer surface of the controller body (203) is fixedly connected to a fixing frame (4), and the right side of the fixing frame (4) is fixedly connected to the left side of the support frame (1).

4. The vehicle mounted falling weight deflectometer according to claim 1, wherein: An L-shaped plate (7) is fixedly connected to the outer surface of the drive motor (207), and the bottom surface of the L-shaped plate (7) is fixedly connected to the upper surface of another connecting plate (210).

5. The vehicle mounted falling weight deflectometer according to claim 1, wherein: Each of the vacuum negative pressure pumps (206) has a fixed block (6) fixedly connected to its outer surface, and the bottom surface of each fixed block (6) is fixedly connected to the upper surface of the connecting plate (210).

6. The vehicle-mounted falling weight deflectometer according to claim 1, characterized in that: Each infrared ranging sensor (212) has a reinforcing ring (5) fixedly connected to its outer surface, and the outer surface of each reinforcing ring (5) is fixedly connected to the outer surface of the arc block (211).

Images