Municipal concrete pavement quality detection device

Abstract

The utility model provides a municipal concrete pavement quality detection device, and relates to the technical field of pavement detection. The device comprises a mounting base, a swing rod, a friction wheel, a limiting piece, a force applying piece and a measuring device, one end of the swing rod is hinged to the mounting base, the friction wheel is rotationally connected with the other end of the swing rod, and when the end, away from the hinged position of the friction wheel, of the swing rod rotates to the lowest point of the rotating track of the end, the friction wheel is driven to rotate to the limiting piece. The wheel surface of the friction wheel can abut against a road surface to be detected; the limiting piece is detachably connected with the friction wheel, and the limiting piece can limit rotation of the friction wheel when the limiting piece is connected with the friction wheel; the force application piece is in transmission connection with the swing rod and can apply the same detection force to the swing rod; the measuring device can measure the upward swinging height of the end, away from the hinge position of the swing rod, of the swing rod. The device has the effect of high experiment precision.

Description

Technical Field

[0001] This application relates to the field of road surface testing technology, and in particular to a municipal concrete road surface quality testing device. Background Technology

[0002] During use, the surface of highway bridge pavements wears down due to friction, making them prone to vehicle slippage. To prevent this, it is necessary to use municipal concrete pavement quality testing equipment to inspect highway bridge pavements.

[0003] Existing municipal concrete pavement quality testing devices generally include a frame, a pendulum, and a rubber pad. The top of the pendulum is hinged to the frame, and the rubber pad is located at the bottom of the pendulum. When the rubber pad is at the lowest point of its rotation trajectory, it will come into contact with the pavement. This allows the user to determine whether the pavement's friction coefficient is up to standard by repeatedly raising the bottom of the pendulum to a certain height and then releasing it, and then observing the upward rotation of the pendulum after friction with the pavement.

[0004] However, because the rubber sheet will wear down after colliding with the road surface, the friction force between the rubber sheet and the road surface measured in repeated experiments will have a large deviation, resulting in low experimental accuracy.

[0005] Therefore, there is a need to provide a quality testing device for municipal concrete pavement. Utility Model Content

[0006] To address the issue of low experimental accuracy in existing municipal concrete pavement quality testing devices, this application provides a municipal concrete pavement quality testing device.

[0007] This application provides a municipal concrete pavement quality testing device, which adopts the following technical solution: including a mounting base, a swing rod, a friction wheel, a limiting component, a force-applying component, and a measuring device. One end of the swing rod is hinged to the mounting base, and the friction wheel is rotatably connected to the other end of the swing rod. When the end of the swing rod away from its hinge point rotates to the lowest point of the rotation trajectory of that end, the wheel surface of the friction wheel can abut against the pavement to be tested.

[0008] The limiting member is detachably connected to the friction wheel, and the limiting member can restrict the rotation of the friction wheel when connected to it;

[0009] The force-applying component is connected to the pendulum rod and can apply the same magnitude of detection force to the pendulum rod;

[0010] The measuring device can measure the height at which the end of the pendulum rod away from its hinge point swings upwards.

[0011] By adopting the above technical solution, when testing the friction coefficient of the road surface to be tested, the user can first let the end of the pendulum rod away from its hinge hang down naturally, so that the wheel surface of the friction wheel abuts against the road surface to be tested. Then, a certain amount of testing force is applied to the pendulum rod through the force-applying component. After overcoming the friction between the wheel surface of the friction wheel and the road surface to be tested, the testing force will do work on the pendulum rod and make the end of the pendulum rod away from its hinge swing upward. After the measuring device detects the height of the upward swing of the end of the pendulum rod away from its hinge, the user can measure the friction coefficient of the road surface to be tested based on the height and the contact force between the friction wheel and the road surface to be tested. When repeating the test multiple times, the user can change the area of ​​friction between the friction wheel and the road surface to be tested by first separating the limiting component from the friction wheel, then rotating the friction wheel at a certain angle, and finally connecting the limiting component to the friction wheel. This can ensure that the results of repeated tests will not deviate due to wear on the friction wheel, so that the municipal concrete road surface quality testing device has good experimental accuracy.

[0012] Specifically, the friction wheel is detachably connected to the swing arm.

[0013] By adopting the above technical solution, the detachable connection between the friction wheel and the swing arm makes it convenient for users to replace the friction wheel.

[0014] Furthermore, a friction wheel shaft is provided at one end of the swing arm away from its hinge point, and a splined bushing is rotatably connected to the friction wheel shaft. The friction wheel has a splined groove that matches the splined bushing, and the swing arm can be inserted into the splined groove and connected to the friction wheel via the splined bushing.

[0015] By adopting the above technical solution, the rocker arm can be connected to the friction wheel through a key connection with the splined shaft sleeve.

[0016] Specifically, the limiting component is a sliding sleeve, which is sleeved on the rocker arm and can slide along the rocker arm. The bottom of the sliding sleeve has a limiting groove that matches the splined bushing. The groove wall of the limiting groove has a limiting key groove that matches the key of the splined bushing. The friction wheel is rotatably connected to the end of the splined bushing away from the rocker arm. The end of the splined bushing near the rocker arm can be inserted into the limiting groove when the sliding sleeve approaches the splined bushing, and the limiting key groove is connected to the key of the splined bushing to limit the rotation of the splined bushing.

[0017] By adopting the above technical solution, the user can move the sliding sleeve away from the spline bushing so that the keyway is separated from the spline bushing, thereby allowing the spline bushing to drive the friction wheel to rotate around the friction wheel shaft; the user can also move the sliding sleeve closer to the spline bushing so that the keyway is connected to the spline bushing, thereby restricting the spline bushing from driving the friction wheel to rotate around the friction wheel shaft.

[0018] Specifically, the force-applying component is a pendulum, the top of which is hinged to the mounting base, and the bottom of which can strike the pendulum rod when rotating around its hinge point.

[0019] By adopting the above technical solution, during multiple tests, the user can apply the same testing force to the pendulum by raising the bottom of the pendulum to the same height.

[0020] Specifically, the mounting base includes a nozzle, a water tank, and a water pump. The nozzle is connected to the interior of the water tank via a pipe. The water pump is connected to the pipe between the nozzle and the water tank and can pump water from the water tank to the nozzle. The spray holes of the nozzle face the contact point between the friction wheel and the road surface to be tested.

[0021] By adopting the above technical solution, users can spray water onto the contact point between the friction wheel and the road surface to be tested using a water pump and nozzle, thereby simulating road surfaces under different levels of moisture.

[0022] Furthermore, the mounting base also includes a cooling device capable of cooling the water in the water tank.

[0023] By adopting the above technical solution, users can use a refrigeration device to cool the water in the water tank to simulate a wet road surface in winter.

[0024] Furthermore, the mounting base also includes a temperature sensor and a display screen. The temperature sensor can detect the temperature of the water in the water tank, and the display screen is electrically connected to the temperature sensor and can display the detection result of the temperature sensor.

[0025] By adopting the above technical solution, users can observe the water temperature in the tank through temperature sensors and displays, making it convenient for testing.

[0026] In summary, this application includes the following beneficial technical effects:

[0027] The device includes a mounting base, a swing arm, a friction wheel, a limiting component, a force-applying component, and a measuring device. One end of the swing arm is hinged to the mounting base, and the friction wheel is rotatably connected to the other end of the swing arm. When the end of the swing arm furthest from its hinge point rotates to the lowest point of its rotation trajectory, the surface of the friction wheel can abut against the road surface to be tested. The limiting component is detachably connected to the friction wheel and can restrict the rotation of the friction wheel when connected to it. The force-applying component is drivenly connected to the swing arm and can apply the same magnitude of detection force to the swing arm. The measuring device can measure the height of the swing arm furthest from its hinge point when it swings upwards, so that when testing the friction coefficient of the road surface to be tested, the user can first let the end of the swing arm furthest from its hinge point hang naturally so that the surface of the friction wheel abuts against the road surface to be tested, and then apply a force to the swing arm through the force-applying component. A fixed detection force, after overcoming the friction between the friction wheel and the road surface to be tested, performs work on the pendulum, causing the end of the pendulum furthest from its hinge to swing upwards. After the measuring device detects the height of the upward swing of the end of the pendulum furthest from its hinge, the user can measure the friction coefficient of the road surface to be tested based on this height and the contact force between the friction wheel and the road surface to be tested. During repeated testing, the user can change the area of ​​friction between the friction wheel and the road surface to be tested by first separating the limiting member from the friction wheel, then rotating the friction wheel by a certain angle, and finally connecting the limiting member back to the friction wheel. This ensures that the results of repeated testing will not deviate due to wear on the friction wheel, thus giving the municipal concrete road surface quality testing device good experimental accuracy. Attached Figure Description

[0028] Figure 1 This is a perspective view of a municipal concrete pavement quality testing device according to this application;

[0029] Figure 2 It is along Figure 1 A schematic sectional view of the radial section of the center spline bushing;

[0030] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the AA direction.

[0031] Reference numerals in the attached drawings: 1. Mounting base; 11. Anchor bolt; 12. Limiting rod; 13. Nozzle; 14. Water tank; 15. Water pump; 16. Refrigeration unit; 17. Display screen; 2. Swing rod; 21. Friction wheel shaft; 22. Splined bushing; 3. Friction wheel; 4. Limiting component; 41. Limiting keyway; 5. Force-applying component; 6. Measuring device. Detailed Implementation

[0032] Figure 1 This is a perspective view of a municipal concrete pavement quality testing device according to this application. Figure 2 It is along Figure 1A schematic sectional view of the radial section of the center spline bushing. See also Figure 1 and Figure 2 The municipal concrete pavement quality testing device provided in this application includes: a mounting base 1, a swing arm 2, a friction wheel 3, a limiting component 4, a force-applying component 5, and a measuring device 6. The mounting base 1 includes three anchor bolts 11, a water tank 14, a nozzle 13, a water pump 15, a cooling device 16, a temperature sensor (not shown in the figure), a load sensor (not shown in the figure), and a display screen 17. Three connecting ears are provided at equal intervals along the circumference on the side wall of the mounting base 1. Each connecting ear has an internal thread on its inner wall. The three anchor bolts 11 correspond one-to-one with the three connecting ears. The screw head of each anchor bolt 11 is connected to a rubber pad for contact with the ground. The screw rod end of each anchor bolt 11 is screwed onto the corresponding connecting ear, so that the user can change the distance between the connecting ear and the ground by rotating these anchor bolts 11, thereby enabling the municipal concrete pavement quality testing device to be applicable to sloping pavements.

[0033] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the AA direction. See also Figure 2 and Figure 3 The top of the rocker arm 2 is hinged to the mounting base 1. A friction wheel shaft 21 is located at the bottom of the rocker arm 2. A splined bushing 22 is rotatably connected to the friction wheel shaft 21. A splined groove adapted to the splined bushing 22 is formed on the friction wheel 3. The rocker arm 2 can be connected to the friction wheel 3 by inserting the splined bushing 22 into the splined groove, so that the friction wheel 3 can be rotatably connected to the end of the splined bushing 22 away from the rocker arm 2. The limiting member 4 is a sliding sleeve, which is fitted onto the rocker arm 2 and can slide along the rocker arm 2. The bottom of the sliding sleeve has a groove adapted to the splined bushing 22. The fitting shaft limiting groove has a key limiting groove 41 on its groove wall that matches the key of the spline bushing 22. This allows the user to move the sliding sleeve away from the spline bushing 22, so that the key limiting groove 41 is separated from the spline bushing 22, thereby allowing the spline bushing 22 to drive the friction wheel 3 to rotate around the friction wheel shaft 21. Alternatively, the user can move the sliding sleeve closer to the spline bushing 22, so that the key limiting groove 41 is connected to the spline bushing 22, thereby restricting the spline bushing 22 from driving the friction wheel 3 to rotate around the friction wheel shaft 21.

[0034] See Figure 1 and Figure 2The force-applying component 5 is a pendulum, the top of which is hinged to the hinge shaft of the pendulum rod 2. The bottom of the pendulum can strike the pendulum rod 2 when rotating around its hinge point. A limiting rod 12 is also provided on the top of the mounting base 1. A limiting groove is provided at the bottom of the limiting rod 12. A through hole for inserting a pin is provided on the groove wall of the limiting groove, so that the user can lift the rod of the pendulum into the limiting groove and then insert the pin to abut against the pendulum to limit the downward rotation of the pendulum. This ensures that the bottom of the pendulum is raised to the same height to apply the same amount of detection force to the pendulum rod 2.

[0035] See Figure 1 and Figure 2 The nozzle 13 is connected to the inside of the water tank 14 through a pipe. The water pump 15 is connected to the pipe between the nozzle 13 and the water tank 14 and can pump the water in the water tank 14 to the nozzle 13. The spray hole of the nozzle 13 faces the contact point between the friction wheel 3 and the road surface to be tested. The cooling device 16 is a semiconductor cooling chip located on the top of the water tank 14, which can cool the water in the water tank 14. A temperature sensor and a display screen 17 are also included. The temperature sensor can detect the temperature of the water in the water tank 14. The display screen 17 is electrically connected to the temperature sensor and can display the detection result of the temperature sensor, so that the user can observe the water temperature in the water tank 14 through the temperature sensor and the display screen 17. Then, water is sprayed onto the contact point between the friction wheel 3 and the road surface to be tested through the water pump 15 and the nozzle 13, thereby simulating the road surface under different seasons and different humidity levels.

[0036] Specifically, the load sensor can be located between the pendulum 2 and its own hinge axis to detect the contact force between the friction wheel 3 and the road surface to be tested. The display screen 17 can also be electrically connected to the load sensor to display the detection results of the load sensor. The measuring device 6 can be a measuring ruler with a quarter circle engraved with the range so that the user can observe the height of the pendulum 2 swinging upwards at the end away from its own hinge point. The friction wheel 3 can be a rubber wheel to simulate the situation of a wheel on the road surface.

[0037] The working principle of the municipal concrete pavement quality testing device of this application is as follows:

[0038] When testing the friction coefficient of the road surface to be tested, the user can first fix the pendulum to the limit rod 12 with the pin, then let the end of the pendulum 2 away from its hinge hang down naturally, then adjust the anchor bolt 11 to separate the wheel surface of the friction wheel 3 from the road surface to be tested, pull out the pin to make the pendulum apply a certain amount of testing force to the pendulum 2 and make the end of the pendulum 2 away from its hinge swing upward, and then observe the initial height of the end of the pendulum 2 away from its hinge by measuring the ruler.

[0039] Next, the surface of friction wheel 3 is brought into contact with the road surface to be tested. Then, the pin is pulled out so that the pendulum applies the same detection force to the pendulum rod 2. This detection force, after overcoming the friction between the surface of friction wheel 3 and the road surface to be tested, will do work on the pendulum rod 2 and cause the end of the pendulum rod 2 away from its hinge to swing upward. After observing the height of the upward swing of the end of the pendulum rod 2 away from its hinge using a ruler, the user can refer to the difference between this height and the initial height, the contact force between friction wheel 3 and the road surface to be tested reflected on the display screen 17, and the pre-measured pendulum... The friction coefficient of the road surface under test is measured by the total mass of the rod 2 and the friction wheel 3, the limiting component 4, and other components on the pendulum rod 2. During repeated testing, the user can change the area of ​​friction between the friction wheel 3 and the road surface under test by first separating the sliding sleeve from the friction wheel 3, then rotating the friction wheel 3 at a certain angle, and finally connecting the sliding sleeve to the friction wheel 3. This ensures that the results of repeated testing will not deviate due to wear on the friction wheel 3, thus giving the municipal concrete road surface quality testing device good experimental accuracy.

[0040] It should be noted that the above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A municipal concrete pavement quality testing device, characterized in that: The device includes a mounting base (1), a swing arm (2), a friction wheel (3), a limiting component (4), a force-applying component (5), and a measuring device (6). One end of the swing arm (2) is hinged to the mounting base (1). A friction wheel shaft (21) is provided at the end of the swing arm (2) away from its hinge point. A spline bushing (22) is rotatably connected to the friction wheel shaft (21). A spline groove adapted to the spline bushing (22) is provided on the friction wheel (3). The swing arm (2) can be detachably connected to the friction wheel (3) by inserting it into the spline groove through the spline bushing (22). When the end of the swing arm (2) away from its hinge point rotates to the lowest point of the rotation trajectory of that end, the wheel surface of the friction wheel (3) can abut against the road surface to be measured. The limiting member (4) is a sliding sleeve, which is sleeved on the rocker arm (2) and can slide along the rocker arm (2). The bottom of the sliding sleeve is provided with a limiting groove that is adapted to the spline bushing (22). The groove wall of the limiting groove is provided with a limiting key groove (41) that is adapted to the key of the spline bushing (22). The friction wheel (3) is rotatably connected to the end of the shaft of the spline bushing (22) away from the rocker arm (2). The end of the shaft of the spline bushing (22) close to the rocker arm (2) can be inserted into the limiting groove when the sliding sleeve is close to the spline bushing (22), and the limiting key groove (41) is connected to the key of the spline bushing (22) to limit the rotation of the spline bushing (22). The force-applying component (5) is connected to the swing arm (2) and can apply the same detection force to the swing arm (2); The measuring device (6) can measure the height at which the end of the pendulum (2) away from its hinge point swings upwards.

2. The municipal concrete pavement quality testing device according to claim 1, characterized in that: The force-applying component (5) is a pendulum, the top end of which is hinged to the mounting base (1), and the bottom end of which can strike the pendulum rod (2) when rotating around its hinge point.

3. The municipal concrete pavement quality testing device according to claim 1, characterized in that: The mounting base (1) includes a nozzle (13), a water tank (14), and a water pump (15). The nozzle (13) is connected to the inside of the water tank (14) through a pipe. The water pump (15) is connected to the pipe between the nozzle (13) and the water tank (14) and can pump water from the water tank (14) to the nozzle (13). The spray holes of the nozzle (13) face the contact point between the friction wheel (3) and the road surface to be tested.

4. The municipal concrete pavement quality testing device according to claim 3, characterized in that: The mounting base (1) also includes a refrigeration device (16) which is capable of cooling the water in the water tank (14).

5. A municipal concrete pavement quality testing device according to claim 4, characterized in that: The mounting base (1) also includes a temperature sensor and a display screen (17). The temperature sensor can detect the temperature of the water in the water tank (14), and the display screen (17) is electrically connected to the temperature sensor and can display the detection result of the temperature sensor.

Images