CN217059879U - Cement road surface antiskid structure tire wearing and tearing loading equipment - Google Patents
Cement road surface antiskid structure tire wearing and tearing loading equipment Download PDFInfo
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- CN217059879U CN217059879U CN202122877375.4U CN202122877375U CN217059879U CN 217059879 U CN217059879 U CN 217059879U CN 202122877375 U CN202122877375 U CN 202122877375U CN 217059879 U CN217059879 U CN 217059879U
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Abstract
The utility model discloses a cement road surface antiskid structure tire wearing and tearing loading equipment. The equipment mainly comprises a testing machine shell, an over-distance point contact sensor, a limiting sensor, a rotating shaft, a sliding rail, a testing platform, a test piece groove, a tire, a laser three-dimensional imager, a pneumatic cylinder, a motor, a gear, a transmission chain, a screw rod fixing frame, a screw rod and a testing machine system control panel. The utility model has the advantages of being simple in structure and convenient in operation, drive the platform through the motor drive slide rail and do translation motion repeatedly, use system operation panel simultaneously and set up required pressure, the rotational speed, the number of turns isoparametric, to pneumatic cylinder, pivot drive tire to place with the test piece groove in the cement concrete carry out the impact friction test, simulated the sight of concrete three-dimensional appearance and the decay action of cling compound value under the actual road surface vehicle tire load effect, and then provide a new method and make the evaluation to cement concrete wear resistance.
Description
Technical Field
The utility model belongs to the technical field of the cement concrete skid resistance evaluation, especially, relate to a cement road surface antiskid structure tire wearing and tearing loading equipment.
Background
The cement concrete pavement has the characteristics of high strength, good stability, long service life, low maintenance cost and the like, and is widely applied to highway construction in China, but the defects of quick loss of the anti-skid structure, difficult maintenance and the like of the cement concrete pavement limit the large-scale application of the cement concrete pavement to high-grade highways.
The road tunnel has the advantages that the speed of vehicles in the road tunnel is slower than that of a normal road section, the braking is more, the humidity is relatively higher, the air fluidity is low, the tail gas and the oil smoke of the vehicles are easy to be accumulated on the road surface under the wet condition to form a greasy film layer, so that the surface of a cement concrete road in the tunnel presents a mirror surface phenomenon, and traffic safety accidents in the tunnel are frequently reported, which is closely related to the serious shortage of the anti-skid performance of the cement concrete road in the road tunnel.
The traditional evaluation of the anti-skid performance of the cement concrete pavement has only two types: one is the measurement of the depth of the structure, and most of the methods adopt a sand laying method. The sand paving method represents the macroscopic roughness of the pavement for the pavement with irregular texture distribution, the index has obvious significance for evaluating the skid resistance attenuation under high-speed driving, but for the pavement with regular texture distribution such as grooved and the like, the measured value of the sand paving method cannot directly reflect the skid resistance of the grooved pavement due to more factors influencing the construction depth, such as the change of groove parameters. In the design and construction process of the grooved pavement, the size of the construction depth is required by specifications, but a good relation between the construction depth and the grooving parameters cannot be established before construction, so that a certain basis is provided for selection of the grooving parameters in construction. The other is that a relatively common anti-skid test device, namely a pendulum type friction coefficient meter is used, when a transverse grooved pavement is measured, the measured value is often increased due to jumping, and the anti-skid performance of the pavement cannot be truly reflected.
In a cement concrete wear resistance test method given by the existing industry standard road engineering cement and cement concrete test procedure (JTG 3420 and 2020) T0567, a steel pattern wheel blade is adopted to abrade concrete, the contact pressure between the blade and the concrete is fixed, and the abrasion performance of the concrete and mortar can be indirectly evaluated. However, this method has two drawbacks: firstly, the steel blade grinding head cannot effectively represent the abrasion effect of real tires (category, tire pressure, grounding pressure and the like) and texture parameters thereof on concrete; secondly, the grounding pressure cannot be continuously adjusted to simulate the load action of vehicles of different grades; thirdly, the three-dimensional shape of the concrete surface structure cannot be continuously and finely measured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cement road surface antiskid structure tire wearing and tearing loading equipment to the defect that exists among the prior art with not enough. The utility model discloses the antiskid structure decay condition of cement concrete under can accurate simulation test in-service use condition can provide accurate quantitative evaluation method for the design of road surface cement concrete antiskid structure and the selection of adding shop's top facing material.
In order to realize the purpose, the utility model adopts the following technical scheme:
a cement pavement antiskid structure tire abrasion loading device mainly comprises a tester shell, an over-distance point contact sensor, a limit sensor, a rotating shaft, a sliding rail, a test platform, a test piece groove, a tire, a laser three-dimensional imager, a pneumatic cylinder, a motor, a gear, a transmission chain, a screw rod fixing frame, a screw rod and a tester system control panel, wherein the over-distance point contact sensor, the limit sensor, the rotating shaft, the sliding rail, the test platform, the test piece groove, the tire, the laser three-dimensional imager, the pneumatic cylinder, the motor, the gear, the transmission chain, the screw rod fixing frame, the screw rod and the tester system control panel are arranged in the tester shell; a testing machine system control panel is arranged on the front side plate of the testing machine shell, and symmetrical protective doors are respectively arranged on two sides of the testing machine system control panel; the test platform is slidably arranged on the two slide rails, and the outer sides of the two slide rails are fixedly provided with the over-distance point contact sensor and the limit sensor; the sliding rail is fixedly arranged on a bottom plate of the tester shell; the test platform is provided with two symmetrically arranged test piece grooves; the bottom of the test platform is provided with a screw rod fixing frame; the motor, the gear, the transmission chain and the screw rod are arranged below the test platform; one end of the screw rod is fixedly connected with the gear, and the other end of the screw rod penetrates through the screw rod fixing frame and is connected with the screw rod fixing frame through threads; the motor drives the screw rod to rotate through the transmission chain, so that the test platform is driven to move; the two sides of the rotating shaft are respectively connected with and installed with tires through connecting rods, two laser three-dimensional imaging instruments which are symmetrically arranged are fixedly installed on the upper side of the rotating shaft, and the top of the rotating shaft is connected with the telescopic shaft of the pneumatic cylinder.
The utility model discloses further explain, one side of test platform be equipped with the test piece groove and adjust the pole. The test piece groove adjusting rod is used for loosening and tightening the test piece groove, a test piece is conveniently placed under the loosening condition, and the test result is prevented from being influenced by loosening of the test piece under the tire load action under the tightening condition.
The utility model discloses further explain, pneumatic cylinder install at testing machine shell top and external air compressor machine.
The utility model discloses explain further, the pivot drive tire be 360 rotary motion.
The utility model discloses further explain, test platform under the drive of motor and lead screw, do the back and forth translation motion on the slide rail.
The utility model discloses explain further, testing machine system control panel can adopt PLC or MCU.
In the utility model, the test piece groove is used for placing and fixing the cement concrete test piece; the motor is used for connecting the motor with a gear and driving a screw rod to move through a transmission chain, the screw rod is fixed on the test platform through a screw rod fixing frame so that the test platform can horizontally move left and right when the screw rod rotates, and the limit sensor is used for enabling the test platform to return after the test platform reaches a set position under the driving of the slide rail; the over-distance point contact sensor has the function of preventing the test platform from impacting the shell of the test machine to cause test accidents under the condition that the limit sensor fails when the test platform repeatedly moves horizontally under the driving of the sliding rail; the tire is connected with the rotating shaft, and the tire can rotate 360 degrees when the test platform moves horizontally, and the test piece is subjected to uniform tire load impact friction; the laser three-dimensional imager is used for scanning the three-dimensional appearance of a cement concrete test piece in real time and processing three-dimensional point cloud data through an optical fiber line external connection mobile computer; the system control panel is used for setting parameters such as required pressure, rotating speed, turns and the like according to test requirements; the pneumatic cylinder is connected with the rotating shaft and is externally connected with the pneumatic press, and the pneumatic cylinder is used for keeping a set pressure value unchanged when the tire impacts a friction test piece and controlling influence of external factors irrelevant to the test.
The utility model provides a use based on the utility model discloses a meticulous evaluation method of cement road surface antiskid structure tire wearing and tearing loading equipment, includes following step:
1) the weight of the cured cement concrete test piece was measured and recorded as g 1 Measuring the surface slip resistance value BPN of the cement concrete test piece 0 ；
2) Placing a cement concrete test piece into a test piece groove, starting a cement pavement antiskid structure tire abrasion loading device, and adjusting experiment parameters including pressure, rotating speed and turns required by an experiment through a test machine system control panel; simultaneously scanning the initial three-dimensional shape by using a laser three-dimensional imager;
3) after experimental parameters are set by using a control panel of the testing machine system, the pneumatic cylinder works, and meanwhile, the rotating shaft drives the tire to perform an impact friction test under the action of simulated tire load on the surface of the cement concrete test piece;
4) after the experiment reaches the set condition, the rotating shaft and the pneumatic cylinder stop working, the motor stops operating, the impact friction test is ended, the laser three-dimensional imager is started to scan the three-dimensional shape change after the experiment, and meanwhile, the surface anti-slip value BPN of the cement concrete test piece is measured 1 ；
5) Adjusting experiment parameters, and repeating the steps 3) and 4);
6) calculating the change rule of the surface skid resistance value of the cement concrete under the influence of the factors of loading pressure, rotating speed and turns;
7) processing three-dimensional point cloud data obtained by scanning of a laser three-dimensional imager through MATALB software, and analyzing a three-dimensional shape change rule of a cement concrete test piece under the influence of factors such as a surface anti-slip value, loading pressure, a rotating speed and the number of turns of cement concrete;
8) and establishing an index relation among the three-dimensional shape change of the cement concrete pavement, the loading condition and the skid resistance attenuation.
Further explaining, the specification and the size of the cement concrete test piece are matched with the test piece groove on the test platform.
The utility model has the advantages that:
1. the utility model has the advantages of simple operation, it is convenient, drive the platform through the motor drive lead screw and do the translation motion repeatedly on the slide rail, use system control panel to set up required pressure simultaneously, the rotational speed, the number of turns isoparametric, with the pneumatic cylinder, the pivot drives the tire and carries out the impact friction test to the cement concrete test piece of placing in the test piece groove, concrete three-dimensional appearance and the sight of cling compound decay action under the effect of actual road surface vehicle tire load have been simulated, and then a new method is proposed and cement concrete wear resistance is made the evaluation.
2. The device of the utility model directly loads the test piece by the action of the pneumatic cylinder on the tire, thus truly simulating the road surface abrasion; the tire is adopted to impact and rub the test piece, so that the friction effect on the road surface is simulated more truly.
3. The utility model discloses thereby can pass through system regulation control pneumatic cylinder effect and tire direct action and test piece according to the demand on, the effect condition of true simulation driving load.
4. The utility model discloses can pass through the long-term impact friction who receives of system regulation control rotational speed, number of turns more truly simulation road surface according to the demand.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a part of the testing platform in an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a power tire part for simulating a driving load according to an embodiment of the present invention.
Fig. 4 is a schematic view of a power driving structure of the testing platform according to an embodiment of the present invention.
Reference numerals: the method comprises the following steps of 1-a tester shell, 2-an over-distance point contact sensor, 3-a limit sensor, 4-a rotating shaft, 5-a sliding rail, 6-a test piece groove adjusting rod, 7-a test platform, 8-a test piece groove, 9-a tire, 10-a laser three-dimensional imager, 11-a pneumatic cylinder, 12-a motor, 13-a gear, 14-a transmission chain, 15-a screw rod fixing frame, 16-a screw rod and 17-a tester system control panel.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-4, a cement pavement antiskid structure tire abrasion loading device mainly comprises a tester shell 1, and an over-distance point contact sensor 2, a limit sensor 3, a rotating shaft 4, a sliding rail 5, a test platform 7, a test piece groove 8, a tire 9, a laser three-dimensional imager 10, a pneumatic cylinder 11, a motor 12, a gear 13, a transmission chain 14, a screw rod fixing frame 15, a screw rod 16 and a tester system control panel 17 which are arranged inside the tester shell 1; a testing machine system control panel 17 is arranged on a front side plate of the testing machine shell 1, and symmetrical protective doors are respectively arranged on two sides of the testing machine system control panel 17;
the test platform 7 is slidably mounted on the two slide rails 5, and the outside of each slide rail 5 is fixedly provided with the super-distance point contact sensor 2 and the limit sensor 3; the slide rail 5 is fixedly arranged on a bottom plate of the tester shell 1;
the test platform 7 is provided with two symmetrically arranged test piece grooves 8; the bottom of the test platform 7 is provided with a screw rod fixing frame 15; the motor 12, the gear 13, the transmission chain 14 and the screw rod 16 are arranged below the test platform 7; one end of the screw rod 16 is fixedly connected with the gear 13, and the other end of the screw rod penetrates through the screw rod fixing frame 15 and is connected with the screw rod fixing frame through threads; the motor 12 drives the screw rod 16 to rotate through the transmission chain 14, and further drives the test platform 7 to move;
the two sides of the rotating shaft 4 are respectively connected with and provided with tires 9 through connecting rods, two symmetrically arranged laser three-dimensional imaging instruments 10 are fixedly arranged on the upper side of the rotating shaft 4, and the top of the rotating shaft 4 is connected with the telescopic shaft of the pneumatic cylinder 11.
Furthermore, a test piece groove adjusting rod 6 is arranged on one side of the test platform 7.
Further, the pneumatic cylinder 11 install at testing machine shell 1 top and external air compressor machine.
Further, the rotating shaft 4 drives the tire 9 to rotate 360 degrees.
Further, the test platform 7 is driven by the motor 12 and the screw rod 16 to make reciprocating translational motion on the slide rail 5.
The embodiment also provides a fine evaluation method based on the tire wear loading equipment using the cement pavement antiskid structure, which comprises the following steps:
1) the weight of the cured cement concrete test pieces (300 mm 50 mm) was measured and recorded as g 1 Measuring the surface slip resistance value BPN of the cement concrete test piece 0 ；
2) Placing a cement concrete test piece into a test piece groove 8, starting a cement pavement antiskid structure tire abrasion loading device, and adjusting experiment parameters including pressure, rotating speed and number of turns required by an experiment through a test machine system control panel 17; simultaneously scanning the initial three-dimensional topography using a laser three-dimensional imager 10;
3) after experimental parameters are set by using a testing machine system control panel 17, the pneumatic cylinder 11 works, and meanwhile, the rotating shaft 4 drives the tire 9 to perform an impact friction test under the action of simulated tire load on the surface of the cement concrete sample;
4) after the experiment reaches the set conditions, the rotating shaft 4 and the pneumatic cylinder 11 stop working, the impact friction test is finished, the laser three-dimensional imager 10 is started to scan the three-dimensional shape change after the experiment, and the surface anti-slip value BPN of the cement concrete test piece is measured at the same time 1 ；
5) Adjusting experiment parameters, and repeating the steps 3) and 4);
6) calculating the change rule of the surface skid resistance value of the cement concrete under the influence of the factors of loading pressure, rotating speed and turns;
7) processing three-dimensional point cloud data obtained by scanning of the laser three-dimensional imager 10 through MATALB software, and analyzing the three-dimensional shape change rule of the cement concrete test piece under the influence of factors such as the surface skid resistance value of the cement concrete and the loading pressure, the rotating speed and the number of turns;
8) and establishing an index relation among the three-dimensional shape change, the loading condition and the skid resistance attenuation of the cement concrete pavement.
It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the practice of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description; this is not necessary, nor exhaustive, of all embodiments; and obvious changes and modifications can be made without departing from the scope of the present invention.
Claims (5)
1. The utility model provides a cement road surface antiskid structure tire wearing and tearing loading equipment which characterized in that: the device mainly comprises a tester shell (1), and a super-distance point contact sensor (2), a limit sensor (3), a rotating shaft (4), a sliding rail (5), a test platform (7), a test piece groove (8), a tire (9), a laser three-dimensional imager (10), a pneumatic cylinder (11), a motor (12), a gear (13), a transmission chain (14), a screw rod fixing frame (15), a screw rod (16) and a tester system control panel (17) which are arranged in the tester shell (1);
a testing machine system control panel (17) is arranged on a front side plate of the testing machine shell (1), and two sides of the testing machine system control panel (17) are respectively provided with symmetrical protective doors;
the testing platform (7) is slidably mounted on the two sliding rails (5), and the two ends of the outer side of each sliding rail (5) are fixedly provided with the super-distance point contact sensor (2) and the limit sensor (3); the sliding rail (5) is fixedly arranged on a bottom plate of the tester shell (1);
the test platform (7) is provided with two symmetrically arranged test piece grooves (8); a screw rod fixing frame (15) is arranged at the bottom of the test platform (7);
the motor (12), the gear (13), the transmission chain (14) and the screw rod (16) are arranged below the test platform (7); one end of the screw rod (16) is fixedly connected with the gear (13), and the other end of the screw rod penetrates through the screw rod fixing frame (15) and is connected with the screw rod fixing frame through threads; the motor (12) drives the screw rod (16) to rotate through the transmission chain (14), and then drives the test platform (7) to move;
the two sides of the rotating shaft (4) are respectively connected with and provided with tires (9) through connecting rods, two laser three-dimensional imaging instruments (10) which are symmetrically arranged are fixedly arranged on the upper side of the rotating shaft (4), and the top of the rotating shaft (4) is connected with the telescopic shaft of the pneumatic cylinder (11).
2. The cement pavement anti-skid construction tire wear loading device of claim 1, characterized in that: the test platform (7) is also provided with a test piece groove adjusting rod (6).
3. The cement pavement antiskid structure tire wear loading device according to claim 1, characterized in that: pneumatic cylinder (11) install at testing machine shell (1) top and external air compressor machine.
4. The cement pavement anti-skid construction tire wear loading device of claim 1, characterized in that: the rotating shaft (4) drives the tire (9) to rotate 360 degrees.
5. The cement pavement anti-skid construction tire wear loading device of claim 1, characterized in that: the test platform (7) is driven by the motor (12) and the screw rod (16) to do reciprocating translational motion on the slide rail (5).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121792974 | 2021-08-03 | ||
| CN202121792974X | 2021-08-03 |
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| Publication Number | Publication Date |
|---|---|
| CN217059879U true CN217059879U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122877375.4U Active CN217059879U (en) | 2021-08-03 | 2021-11-23 | Cement road surface antiskid structure tire wearing and tearing loading equipment |
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| CN (1) | CN217059879U (en) |
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- 2021-11-23 CN CN202122877375.4U patent/CN217059879U/en active Active
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