CN2788174Y

CN2788174Y - Pitch mixed material accelerating and loading tester

Info

Publication number: CN2788174Y
Application number: CN 200520078598
Authority: CN
Inventors: 张争奇; 赵战利; 陶晶; 刘希林; 薛小刚
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2005-04-11
Filing date: 2005-04-11
Publication date: 2006-06-14
Anticipated expiration: 2015-04-11

Abstract

The utility model discloses an accelerating and loading tester for asphalt mixed material, which comprises a bearing platform, wherein the bearing platform is arranged at the bottom part of an environmental box, and is provided with a middle shaft which is connected with a cross beam; both ends of the cross beam is connected with a test wheel through a flexible assembly; the cross beam is connected with loading blocks which are positioned on the periphery of the middle shaft which is connected with a positioning rod; the positioning rod is connected with a laser probe which is connected with a data acquisition device; the middle shaft is connected with a motor; the wall of the environmental box is connected with a temperature sensor. The utility model efficiently reduces line speed difference at the inner and the outer sides of a tire so as to unify the friction state, avoids the influence on tire pressure stability of the test wheel transmitted by the loading blocks caused by rugged surface of a test piece and forming height errors, and can meet the requirement of measuring macro and microscopic structures of road surfaces; the laser probe is convenient to assemble and disassemble, the precision can be from 0.01 mm to 0.02 mm.

Description

Asphalt accelerating and loading test instrument

Technical field

The utility model relates to transportation industry ground surface material performance detection apparatus, particularly a kind of asphalt accelerating and loading test instrument.

Background technology

Modern road traffic transportation presents the characteristics of big flow, the high speed of a motor vehicle, heavy wheel load day by day, therefore to character of surface, non-deformability and the anti-damage by water demands for higher performance of asphalt.Generally speaking, this several respects performance of asphalt often can both satisfy the requirement of acceptance specification at the beginning of the road surface is built up, but prolongation along with the time, decay in various degree all will take place under the effect of driving and environment, that have even be reduced to quite low degree in a short period of time, these all badly influence the normal performance of traffic safety and surface feature, and road management department has to take the maintenance measure to be improved for this reason, have not only influenced traffic but also have caused the loss of economic aspect.Therefore, be necessary the test method quickening to load by a kind of, know the performance degradation rule of asphalt under the driving vehicle effect in advance, and select traffic safety and the long-term good high-quality compound of Pavement Performance in view of the above.

Although aspect the accelerating and loading test method of performance of asphalt mixture attenuation law some researchs are being arranged at present, effect is different.

Large-scale circular track test: it is to realize by the mode that long-term Pavement Performance detects; Advantage is that data are comprehensive, near the time of day on road surface; Shortcoming is to last very longly, and labor intensive, financial resources are more, and because influence factors such as physical environment, traffic factor, operating technique and level are more, is difficult to the Pavement Performance response of single test condition made accurately judge.

Indoor acceleration loading or test simulation: indoor acceleration Loading Method, as circular track test, stock size is bigger, and moulding and temperature are wayward accurately, and the collection of deformation data generally adopts displacement transducer to realize that precision is lower; The test simulation method as wheel tracking test, generally belongs to special performance test, test index is more single, although temperature can be controlled, the experimental wheel effect belongs to repetition straight way pattern, different with the binding mode of actual vehicle on the road surface, satisfying the need features such as table structure, distortion also can be influential.

Summary of the invention

The purpose of this utility model is to provide a kind of asphalt accelerating and loading test instrument, can improve detection efficiency, reduces experimentation cost, equipment volume is little, has saved that equipment processing cost and test space, data precision improve, practicality strengthens.

The technical solution of the utility model is achieved in that and comprises carrying platform, carrying platform is arranged on the bottom of environmental cabinet, and carrying platform is provided with axis, connects crossbeam on the axis, the two ends of crossbeam connect experimental wheel by elastomeric element, crossbeam is connected with loading blocks, and loading blocks is positioned at the axis periphery, and axis connects backstay, backstay connects laser probe, laser probe links to each other with data collector, and axis links to each other with motor, connects temperature sensor on the environment tank wall.

Be fixed with the water-bath baffle plate around the carrying platform.

Laser probe is apart from the adjustable height of carrying platform.

Experimental wheel is a two-wheel, and the distance between two wheels is 4cm.

The width of another experimental wheel is 6cm.

Technique effect of the present utility model: by the installation of experimental wheel, the distributed degrees symmetrically of load strengthens, and rolls the wheelmark bandwidth and can satisfy the friction factor test request; Because tyre width reduces, reduced the linear differential of the inside and outside both sides of tire effectively simultaneously, and then made its Frotteurism unified as far as possible; Connect load mode by elasticity, efficiently solve test specimen surface irregularity degree and moulding height error pass to experimental wheel tire pressure stability to loading blocks influence; The laser probe easy disassembly, precision can reach 0.01mm～0.02mm, can satisfy that road pavement is grand, the measurement of microtexture; Data collector has adopted high-precision encoder, can realize the precision positioning to measuring point; Temperature control mode can adapt to the requirement of different tests purpose to temperature easily.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

Embodiment

Accompanying drawing is a specific embodiment of the utility model;

Below in conjunction with accompanying drawing content of the present utility model is described in further detail:

The utility model comprises carrying platform 11, carrying platform 11 is arranged on the bottom of environmental cabinet 3, carrying platform 11 is provided with axis 10, connect crossbeam 8 on the axis 10, the two ends of crossbeam 8 connect

experimental wheel

6,15 by elastomeric element 4, be connected with loading blocks 7 with crossbeam 8, loading blocks 7 is positioned at axis 10 peripheries, axis 10 connects backstay 14, backstay 14 connects laser probe 2, and laser probe 2 links to each other with data collector 1, and axis 10 links to each other with motor 12, connect temperature sensor 5 on environmental cabinet 3 walls, motor 12 links to each other with switch board 13 with temperature sensor 5.Experimental wheel 15 is two-wheels, and the distance between two wheels is 4cm.The width of experimental wheel 6 is 6cm.Around carrying platform 11, be fixed with water-bath baffle plate 9.The course of work:

Open switch board 13 power switches, temperature in the temperature sensor 5 display environment casees 3 is a water temperature when having water to exist in the water-bath baffle plate 9; When environment temperature (or water temperature) is pressed switch board 13 operation buttons when reaching testing requirements, drive motor 12 high speed rotating also drive axis 10 motions by belt pulley, the loading system that axis 10 and then drive loading blocks 7 and crossbeam 8 are formed is moved and will be moved through elastomeric element 4 and passes to experimental wheel 6, to do track on the compound test specimen circuit of carrying platform 11 be that the acceleration of circumference loads motion to experimental wheel 6 placing with setting speed (can according to test objective determine), reaches certain test specimen and press stop button after at interval and quicken loading procedure and end; When needs are measured deformation data, laser probe 2 is installed and is connected data collector 1, behind the accurate location of every kind of different compound reference positions, rotate 2 pairs of wheel paths of laser probe at the uniform velocity, slowly and carry out deformation measurement, and by data collector 1 record test figure; Quicken loading procedure and data acquisition, until finishing whole test.

The experimental wheel 6 that the utility model utilizes driven by motor to have tire pressure turns round continuously on test track and quickens abrasion; Have high-resolution laser probe 2 and carry out data acquisition for the surface on experimental wheel trajectory structure and test piece deformation situation, can satisfy that road pavement is grand, the measurement of microtexture, measuring accuracy improves greatly.

Claims

1, asphalt accelerating and loading test instrument, comprise carrying platform (11), carrying platform (11) is arranged on the bottom of environmental cabinet (3), carrying platform (11) is provided with axis (10), axis (10) links to each other with motor (12), it is characterized in that, axis (10) is gone up and is connected crossbeam (8), the two ends of crossbeam (8) connect experimental wheel (6 by elastomeric element (4), 15), be connected with loading blocks (7) with crossbeam (8), loading blocks (7) is positioned at axis (10) periphery, axis (10) connects backstay (14), backstay (14) connects laser probe (2), and laser probe (2) links to each other with data collector (1), connects temperature sensor (5) on environmental cabinet (3) wall.

2, asphalt accelerating and loading test instrument according to claim 1 is characterized in that, carrying platform (11) is fixed with water-bath baffle plate (9) all around.

3, asphalt accelerating and loading test instrument according to claim 1 is characterized in that, laser probe (2) is apart from the adjustable height of carrying platform (11).

4, asphalt accelerating and loading test instrument according to claim 1 is characterized in that, experimental wheel (15) is a two-wheel, and the distance between two wheels is 4cm.

5, asphalt accelerating and loading test instrument according to claim 1 is characterized in that, the width of experimental wheel (6) is 6cm.