Municipal road pavement friction coefficient test detection device

Abstract

The utility model discloses a municipal road surface friction coefficient test detection device, which relates to the technical field of friction coefficient detection devices and comprises a detection platform with a long rectangular frame structure, guide rails are symmetrically arranged on long cross beams on two sides of the detection platform, and a driving trolley is slidably mounted on the detection platform through the guide rails. A sweeping mechanism is arranged on the driving trolley; through the arrangement of the driving trolley, the friction block and the detection platform, the design of a water storage cavity in the friction block allows the weight of the friction block to be dynamically adjusted by injecting or extracting water, and through the arrangement of variables capable of being automatically adjusted and controlled, the friction block can be automatically adjusted and controlled. In combination with real-time detection of the weighing device and the tension sensor, the friction coefficient of the road surface can be accurately measured through multiple data by accurately controlling the weight change of the friction block and monitoring the tension change in real time, and errors of a detection result caused by single data are eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of friction coefficient detection devices, and in particular relates to a municipal road pavement friction coefficient test detection device. Background Art

[0002] The friction coefficient refers to the ratio of the friction between two surfaces and the vertical force acting on one of the surfaces. The detection of the road friction coefficient is an important safety indicator for municipal road construction. It directly affects the grip of vehicles when driving on the road, that is, the friction between the vehicle tires and the ground, thereby affecting driving safety. When the friction coefficient is too small, the adhesion of the vehicle on the road will decrease, resulting in a decrease in the driving ability of the vehicle, and it is easy to cause the vehicle to skid, which is very dangerous. Therefore, we should be able to quickly and conveniently measure the friction coefficient of the road so that we can take effective maintenance measures.

[0003] The patent authorization number is CN 215574556 U, which discloses a road surface friction coefficient detection device. The dynamometer and the rubber block are raised and lowered synchronously through a power mechanism. The friction between the rubber block and the road surface is measured by the dynamometer. By setting a water spray mechanism, rainy days can be simulated to further calculate the friction coefficient of the road surface on rainy days. However, when measuring, the above device cannot directly change the stress applied to the rubber block, resulting in relatively single data of the experimental results. Evaluating the friction performance of the road surface by single data may result in errors, and the detection results are not representative. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a municipal road pavement friction coefficient test detection device, which realizes the detection of multiple data by changing the weight control variable of the friction block, and simulates different road conditions at the same time, thereby improving the accuracy and reliability of the detection result.

[0005] The solution adopted by the utility model to solve its technical problems is: a municipal road pavement friction coefficient test detection device, including a detection platform with a long rectangular frame structure, guide rails are symmetrically arranged on the long cross beams on both sides of the detection platform, a driving trolley is slidably installed on the detection platform through the guide rails, and a cleaning mechanism is arranged on the driving trolley; a friction block is placed in the central frame groove of the detection platform, a tension sensor is installed on the side of the driving trolley, and the detection probe of the tension sensor is connected to the friction block through a traction rope; the friction block is a hollow structure with a water storage cavity inside, a weighing device is matched and installed at the bottom of the water storage cavity, a nozzle is transversely installed on the side of the friction block, the nozzle is connected to the water storage cavity through a water guide pipe, a water pump is installed on the water guide pipe, and a water inlet pipe is connected above the friction block; a control console is installed at the end of the detection platform, and the driving trolley, the tension sensor and the weighing device are electrically connected to the control console.

[0006] Furthermore, the cleaning mechanism includes a transmission shaft vertically symmetrically installed on the driving trolley, a cleaning brush is installed on the lower end of the transmission shaft, and mutually meshing gears are fixedly mounted on the transmission shaft, and the output end of the driving motor installed in the driving trolley is connected to any one of the transmission shafts.

[0007] Furthermore, hook rings are symmetrically installed on both sides of the friction block, and the pull rope on the driving trolley is hung and connected to the hook rings on the sides of the friction block through the pull hooks.

[0008] Furthermore, a friction plate is detachably mounted below the friction block.

[0009] Furthermore, two driving trolleys are symmetrically installed on the detection platform, and the friction block is located between the two driving trolleys.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model provides a driving trolley, a friction block and a detection platform. The design of the water storage chamber inside the friction block allows the weight of the friction block to be dynamically adjusted by injecting or pumping out water. By setting variables that can be automatically adjusted and combining the real-time detection of a weighing device and a tension sensor, the weight change of the friction block is accurately controlled and the tension change is monitored in real time. It is possible to accurately measure the friction coefficient of the road surface through multiple data, thereby eliminating the error in the detection result caused by the single data. The water sprayed onto the ground by the friction block when adjusting the weight can simulate different road conditions. In combination with two driving trolleys, the left driving trolley can pull the friction block through a dry road surface, and the right driving trolley can pull the friction block through a wet road surface, thereby achieving the effect of detecting the friction coefficient under two different road conditions, namely, dry and wet road conditions, and improving the accuracy of detection. By cleaning the road surface through a cleaning mechanism and replacing the worn friction plate, the detection error caused by external factors can be eliminated, thereby further improving the accuracy and reliability of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the driving trolley and the friction block of the utility model;

[0014] Figure 3 This is a schematic diagram of the front cross-sectional structure of the friction block of the utility model;

[0015] Figure 4 It is a schematic diagram of the cleaning mechanism structure of the utility model.

[0016] In the figure: 1. detection platform; 2. guide rail; 3. driving trolley; 31. left driving trolley; 32. right driving trolley; 4. friction block; 41. water storage chamber; 42. weighing device; 43. water inlet pipe; 44. water pump; 45. water guide pipe; 46. nozzle; 47. hook ring; 48. friction plate; 49. threaded plug; 410. threaded hole; 5. tension sensor; 6. traction rope; 7. control panel; 8. support; 9. cleaning mechanism; 91. transmission shaft; 92. cleaning brush; 93. gear; 94. driving motor. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] See also Figure 1-4 The utility model provides a technical solution for a municipal road pavement friction coefficient test detection device: Example

[0019] according to Figure 1 and Figure 2 As shown, it includes a detection platform 1 with a long rectangular frame structure. The detection platform 1 can be supported by a support 8 at the bottom and placed on the road surface to be tested. Linear guide rails 2 are symmetrically arranged on the long cross beams on both sides of the detection platform 1. A driving trolley 3 is slidably installed on the detection platform 1 through the guide rails 2. A control console 7 is installed at the end of the detection platform 1. A driving wheel (not shown in the figure) that can be driven by the control console 7 to rotate on the guide rail 2 is installed below the driving trolley 2. The driving trolley 3 can slide left and right on the guide rail 2 under the control of the control console 7. A friction block 4 is placed in the central frame groove of the detection platform 1, and the bottom of the friction block 4 contacts the ground to be tested. A tension sensor 5 is installed on the side of the driving trolley 3, and the tension sensor 5 is electrically connected to the control console 7. A traction rope 6 is extended and connected to the detection probe of the tension sensor 5. The two ends of the friction block 4 A hook ring 47 is installed on the side, and the traction rope 6 is suspended and connected to the hook ring 47 through the hook at the end. The friction block 4 and the driving trolley 3 are traction-connected by the traction rope 6. The friction block 4 can be pulled by the driving trolley 3 to move in the central frame groove of the detection platform 1, and the friction block 4 and the driving trolley 3 can be separated from each other. When detecting the friction coefficient of the road surface, the friction block 4 is pulled by the driving trolley 3 to slide on the road surface. Since the weight of the friction block 4 is determined, the tension between the driving trolley 3 and the friction block 4 can be detected by the tension sensor 5. The tension sensor 5 detects the tension at the moment when the driving trolley 3 pulls the friction block 4 from static to moving, and calculates the static friction coefficient of the road surface through the control console 7, and then calculates the dynamic friction coefficient of the road surface by detecting the tension of the driving trolley 3 pulling the friction block 4 to slide on the road surface;

[0020] The interior of the friction block 4 is a hollow structure and is configured as a water storage chamber 41. A water inlet pipe 43 is connected to the top of the friction block 4. Water can be injected into the water storage chamber 41 through the water inlet pipe 43. A weighing device 42 is installed at the bottom of the water storage chamber 41, and the weighing device 42 is electrically connected to the control console 7. The weight change of the water in the water storage chamber 41 can be directly measured by the weighing device 42, and the total weight of the friction block 4 can be transmitted to the control console 7 by adding the gravity of the friction block 4 itself. A water cup can also be placed in the water storage chamber and connected to the water conduit. The weight change of the water in the water cup can be measured by the weighing device, and a weighing device 42 is installed laterally at the rear side of the friction block 4. A nozzle 46 is provided, and the nozzle 46 is connected to the water storage chamber 41 through a water pipe 45, and a water pump 44 is installed on the water pipe 45. As the friction block 4 is pulled forward by the driving trolley 3, the water pump 44 operates to gradually pump out the water in the water storage chamber 41 through the water pipe 45, and the weight of the friction block 4 gradually decreases. By setting the weight of the friction block 4 as a variable and combining the tension change between the driving trolley 3 and the friction block 4 detected in real time by the tension sensor 5, the change of the friction coefficient of the friction block 4 during the movement process is calculated and recorded, so that the friction coefficient of the road surface can be accurately measured and it can be judged whether there is an error in the friction coefficient.

[0021] According to the detection needs, two driving carts 3 can be symmetrically arranged on the detection platform 1, which are divided into a left driving cart 31 and a right driving cart 32, and the friction block 4 is located between the two driving carts 3. When detecting the friction coefficient of the road surface, the left driving cart 31 and the friction block 4 are first connected by the traction rope 6, and the left driving cart 31 pulls the friction block 4 from right to left to detect the friction coefficient of the road surface. At the same time, the water in the water storage cavity 41 of the friction block 4 is sprayed out from the right nozzle 46 to wet the road surface passed by the friction block 4. When the left driving cart 31 pulls the friction block 4 to move to complete the friction coefficient detection of the dry road surface, the left driving cart 31 can be separated from the friction block 4, and then the friction block 4 is pulled from left to right by the right driving cart 32 to make the friction block 4 pass through the wet road surface, and the friction coefficient of the wet road surface is detected again. By detecting road surfaces in different conditions, the detection accuracy of the road surface friction coefficient is improved.

[0022] When used specifically, the utility model is a municipal road pavement friction coefficient test detection device. First, water is injected into the water storage chamber 41 of the friction block 4, and the friction block 4 is placed between the two driving carts 3 and in contact with the ground, so that the left driving cart 31 is connected to the left hook 47 of the friction block 4 through the traction rope 6, and then the left driving cart 31 is controlled to pull the friction block 4 from right to left on the detection platform 1. While the friction block 4 moves, the water pump 44 operates to gradually pump out the water in the water storage chamber 41, and the pumped water is sprayed out from the nozzle 46 to wet the road surface where the friction block 4 passes. The weighing device 42 detects the gravity change of the friction block 4 in real time, and the tension sensor 5 detects the left driving cart 31 in real time. The tension between the left driving vehicle 31 and the friction block 4 is used to calculate the friction coefficient of the dry road surface through the control panel 7 and record the change of the friction coefficient with the change of the gravity of the friction block 4. When the left driving vehicle 31 pulls the friction block 4 to move from the right end to the leftmost end, the connection between the left driving vehicle 31 and the friction block 4 is released, and then the right driving vehicle 32 is controlled to move to the left and connect with the hook ring 47 on the right side of the friction block 4. The right driving vehicle 32 pulls the friction block 4 from left to right through the wet road surface, and the friction coefficient of the wet road surface is calculated by the values ​​detected by the tension sensor 5 and the weighing device 42. Finally, the friction coefficient of the road surface is accurately determined by the friction coefficient of the dry road surface and the friction coefficient of the wet road surface. Example

[0023] Based on the first embodiment, the same points as the first embodiment will not be repeated here, and the differences are as follows: Figure 3 As shown, a friction plate 48 is installed below the friction block 4, a threaded hole 410 is provided at the center of the bottom of the friction block 4, and a threaded column 49 matching the threaded hole 410 is vertically provided above the center of the friction plate 48. The friction plate 48 can be threadedly installed on the friction block 4 through the threaded column 49 and the threaded hole 410. When measuring the road friction coefficient, the friction plate 48 contacts the ground to be measured, and the driving trolley 3 pulls the friction block 4 and the friction plate 48 to move on the road surface to detect the friction coefficient of the road surface. After completing a measurement, the friction plate 48 will inevitably wear out. At this time, the friction plate 48 can be removed and replaced, and a new friction plate 48 can be used for measurement again to avoid deviations in the detection results due to wear of the friction block 4. Example

[0024] On the basis of the first embodiment, Figure 4 As shown, a cleaning mechanism 9 is provided under the left driving trolley 31, and the cleaning mechanism 9 includes a transmission shaft 91 which is vertically symmetrically rotatably mounted under the driving trolley 3, and a cleaning brush 92 is installed at the lower end of the transmission shaft 91, and the cleaning brush 92 is in contact with the ground, and a gear 93 which meshes with each other is fixedly mounted on the transmission shaft 91, and a driving motor 94 is installed in the driving trolley 3, and the output end of the driving motor 94 is connected to any one of the transmission shafts 91.

[0025] During specific use, the utility model provides a municipal road pavement friction coefficient test detection device. When the driving trolley 3 pulls the friction block 4 to move to detect the friction coefficient of the road surface, the cleaning mechanism 9 at the bottom of the driving trolley 3 is operated, and the two cleaning brushes 92 are driven to rotate in opposite directions under the meshing of the two gears 93. As the driving trolley 3 moves forward, the road surface below the detection platform 1 is cleaned by the cleaning brush 92, and at the same time, the driving trolley 3 pulls the friction block 4 to move, ensuring that the friction block 4 is clean after cleaning the road surface, thereby preventing the accuracy of the detection result from being affected by dust and other debris on the road surface.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A municipal road pavement friction coefficient test detection device, characterized in that: The invention comprises a detection platform (1) in a long rectangular frame structure, guide rails (2) are symmetrically arranged on the long cross beams on both sides of the detection platform (1), a driving trolley (3) is slidably installed on the detection platform (1) via the guide rails (2), and a cleaning mechanism (9) is arranged on the driving trolley (3); a friction block (4) is placed in the central frame groove of the detection platform (1), a tension sensor (5) is installed on the side of the driving trolley (3), and a detection probe of the tension sensor (5) is connected to the friction block (4) via a traction rope (6); the friction block (4) is a hollow knot The structure has a water storage chamber (41) inside, a weighing device (42) is matched and installed at the bottom of the water storage chamber (41), a nozzle (46) is installed transversely on the side of the friction block (4), the nozzle (46) is connected to the water storage chamber (41) through a water pipe (45), and a water pump (44) is installed on the water pipe (45), and a water inlet pipe (43) is connected to the top of the friction block (4); a control console (7) is installed at the end of the detection platform (1), and the driving trolley (3), the tension sensor (5) and the weighing device (42) are electrically connected to the control console (7).

2. A municipal road pavement friction coefficient test detection device according to claim 1, characterized in that: The cleaning mechanism (9) comprises a transmission shaft (91) vertically symmetrically mounted on the driving trolley (3), a cleaning brush (92) being mounted on the lower end of the transmission shaft (91), and mutually meshing gears (93) being fixedly mounted on the transmission shaft (91), and an output end of a driving motor (94) mounted in the driving trolley (3) being connected to any one of the transmission shafts (91).

3. A municipal road pavement friction coefficient test detection device according to claim 1, characterized in that: Hook rings (47) are symmetrically mounted on both sides of the friction block (4), and a traction rope (6) on the driving trolley (3) is hung and connected to the hook rings (47) on the side of the friction block (4) through a hook.

4. A municipal road pavement friction coefficient test detection device according to claim 1, characterized in that: A friction plate (48) is detachably mounted below the friction block (4).

5. A municipal road pavement friction coefficient test detection device according to claim 1, characterized in that: Two driving trolleys (3) are symmetrically mounted on the detection platform (1), and the friction block (4) is located between the two driving trolleys (3).

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