Background technology
The structure of bituminous pavement generally is at cement stabilized type or the two grey semi-rigid type base layering making asphaltic road-mix surface courses of stablizing class.Generally also adopt asphalt to do the layer of mating formation on the bridge floor, between each surface layer of pitch, between surface layer and surface layer, being bonded to of asphalt mixture surfacing and cement bridge floor to important.
The instrument of special test bituminous pavement or bridge floor pulling force has bridge surface waterproof layer drawing instrument, with the motor is power, adopt spiral lift structure and principle, lower end with bitumen mixture specimen during test is fixed on the anchor clamps, the spiral lift structure draw bitumen mixture specimen on bring in the test bitumen mixture specimen pulling force.
The instrument of special test bituminous pavement or bridge floor interlayer shear power has the electronic boxshear apparatus of bridge surface waterproof layer, its structure and bridge surface waterproof layer drawing instrument are identical, horizontal positioned, end with bitumen mixture specimen during test is fixed on the anchor clamps, the spiral lift structure push away bitumen mixture specimen another bring in the test shearing force.
Pulling force, the shearing force instrument of above-mentioned several test pitch blended stock test specimens, function singleness can not both can be tested pulling force, can test shearing force again, and the instrument heaviness, and inconvenience is carried at field condition and tests.
Applicant of the present utility model had once invented " interlaminar bonding strength tester for pavement " and had applied for national inventing patent, and the patent No. is 200410073207.8.The gear train of this application patent adopts sprocket wheel chain, drive structure of gear worm, carries out transmission and conversion, converts rotatablely moving of stepper motor to main shaft spiralling rectilinear motion.In addition the drawing of this application patent with shear that throw-over gear adopts locked separation nut structure to change to make that this tester complex structure, volume are big, in the weight, to survey data accuracy low.The test specimen of this application patent folder can only press from both sides a test specimen in addition, and different test specimens is wanted clamping test specimen several times, and very inconvenient during test, testing efficiency is low.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the shortcoming of above-mentioned several test bituminous pavement or bridge floor interlayer tensiometer, bituminous pavement or bridge floor interlayer shear power instrument and interlaminar bonding strength tester for pavement, provide a kind of reasonable in design, simple in structure, in light weight, test data accurately and reliably, easy to carry, the pulling force that can test bituminous pavement or bridge floor interlayer at the scene and the bituminous pavement interlayer bonding strength test instrument of shearing force.
Solving the problems of the technologies described above the technical scheme that is adopted is that it comprises: the Programmable Logic Controller and the display that links to each other with Programmable Logic Controller by lead that are arranged on the support right side, be arranged on support left side and the joining stepping motor of planetary reducer, rotary encoder on the auxilliary output shaft that is arranged on stepping motor that links to each other with Programmable Logic Controller by lead, be arranged on support and pass on left the Step-motor Control device that lead and Programmable Logic Controller link to each other with stepping motor, on the output shaft of planetary reducer, output gear of speed reducer is set, rack-mount main shaft top is provided with main shaft and cogs, the bottom is provided with the main shaft lower gear, main shaft cogs or the main shaft lower gear links by clutch coupling and output gear of speed reducer, be arranged on main shaft and the main shaft swivel nut between cogging, the crosshead shoe that is arranged on the sensor tie-plate under main shaft lower end and torque sensor or the pulling force sensor and links with the sensor tie-plate, the upper end of sensor tie-plate and the lower end of main shaft link, the lower end of crosshead shoe and torque sensor or pulling force sensor link, and are arranged on the shear test block installing mechanism under the torque sensor or the pulling force test specimen installing mechanism of pulling force sensor lower end.
Clutch coupling of the present utility model is: on support top splined shaft is set, the upper end of splined shaft is provided with splined shaft input gear, the gear fixed mount that fixed gear and pull bar be installed be arranged on splined shaft outside, be provided with spline gear between fixed gear and the gear fixed mount on the splined shaft, pull bar and change lever link by connector.
Shear test block installing mechanism of the present utility model is: with in the shearing coupling sleeve that the torque sensor lower end connects the shearing connecting column is set, the lower end of shearing coupling sleeve is provided with nut, the lower end of shearing connecting column is provided with the shearing slide post, and at least 2 are provided with the shearing fixed leg on the shear test block tie-plate.
Pulling force test specimen installing mechanism of the present utility model is: with the joining sensor connecting column of pulling force sensor lower end the loop chain that connects with loop chain connecting column upper end is set, the lower end of loop chain connecting column is provided with the drawing test specimen and connects upward cover, the drawing test specimen connect to be gone up the cover lower end and the drawing test specimen connection that connects with drawing test specimen connecting column is set is trapped, and the lower end of drawing test specimen connecting column is provided with drawing test specimen tie-plate.
It is power that the utility model adopts stepping motor, slow down through planetary reducer, driving main shaft through the gear drive transmission rotates or moves up and down, sensor coupling mechanism by being arranged on the main shaft lower end and torque sensor or pulling force sensor link, torque sensor or pulling force sensor are added to bitumen mixture specimen torque vigor conversion of signals with collection and become electric signal to output to Programmable Logic Controller, Programmable Logic Controller calculates by the program of prior setting, result of calculation is outputed to display, and display demonstrates result of calculation.The utility model is compared with interlaminar bonding strength tester for pavement, have reasonable in design, simple in structure, volume is little, in light weight, test data accurately and reliably, the effect height, easy to carry, advantage such as can test at the scene.The utility model can the newly-built of bituminous concrete road with the maintenance in be used to test different contact interfaces interlaminar bonding intensity, the cohesive strength that also can test other two kinds of different materials contact interfaces.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Embodiment 1
In Fig. 1, the bituminous pavement interlayer bonding strength test instrument of present embodiment is by planetary reducer 1, output gear of speed reducer 2, transmission gear 3, splined shaft input gear 4, splined shaft 5, spline gear 6, main shaft shaft collar 7, swivel nut 8, main shaft cogs 9, main shaft lower gear 10, main shaft 11, display 12, Programmable Logic Controller 13, sensor tie-plate 14, crosshead shoe 15, torque sensor 16, shear test block installing mechanism 17, support 18, Step-motor Control device 19, rotary encoder 20, stepping motor 21, fixed gear 22, gear fixed mount 23, pull bar 24, change lever 25, pulling force sensor 26, pulling force test specimen installing mechanism 27 connects formation.
Be installed with Programmable Logic Controller 13 on support 18 right sides with the screw threads for fastening connector, the model of Programmable Logic Controller 13 is DVP14SST2, be the market sale commodity, be installed with display 12 with the screw threads for fastening connector on support 18 right sides, display 12 links to each other with Programmable Logic Controller by lead.Left side on support 18 is installed with stepping motor 21 with the screw threads for fastening connector, stepping motor 21 provides power for the utility model, on the auxilliary output shaft of stepping motor 21, be connected with rotary encoder 20, rotary encoder 20 links to each other with Programmable Logic Controller 13 by lead, the tach signal that rotary encoder 20 will collect stepping motor 21 converts electric signal to, output to Programmable Logic Controller 13, in the left side of support 18 with the screw threads for fastening connector Step-motor Control device 19 that has been fixedly connected, Step-motor Control device 19 is connected with stepping motor 21 with Programmable Logic Controller 13 by lead, Programmable Logic Controller 13 outputs to Step-motor Control device 19 with control signal, by the rotating speed of Step-motor Control device 19 control step motor 21.The output shaft of stepping motor 21 is connected with speed reduction unit with connector, and the speed reduction unit of present embodiment is a planetary reducer 1, because the utility model has adopted this speed reduction unit, has reduced volume and weight of the present utility model.Be connected with output gear of speed reducer 2 with connector on the output shaft of planetary reducer 1.
On support 18 tops splined shaft 5 is installed, the upper end of splined shaft 5 is connected with splined shaft input gear 4 with connector, gear fixed mount 23 is sleeved on the outside of splined shaft 5, fixed gear 22 usefulness connectors connect on the gear fixed mount 23, be connected with spline gear 6 with thrust bearing between fixed gear 22 and the gear fixed mount 23 on the splined shaft 5, by thread connection pull bar 24 is installed on gear fixed mount 23, pull bar 24 and change lever 25 link by connector.On support 18 tops transmission gear 3 is installed, transmission gear 3 is meshed with output gear of speed reducer 2 and splined shaft input gear 4.Splined shaft 5, spline gear 6, fixed gear 22, gear fixed mount 23, pull bar 24, change lever 25 are connected into the clutch coupling of present embodiment.Planetary reducer 1 rotates, and output gear of speed reducer 2 drives splined shaft input gear 4 by transmission gear 3 and rotates.
Be installed with main shaft 11 on support 18 tops with two main shaft shaft collars 7, shaft collar 7 bottoms on the main shaft 11 are connected with main shaft with thrust bearing and cog 9, shaft collar 7 tops under the main shaft 11 are connected with main shaft lower gear 10 with thrust bearing, main shaft cog 9 with main shaft lower gear 10 between connect with thrust bearing.The gear train that output gear of speed reducer 2, transmission gear 3, splined shaft input gear 4, main shaft cog 9, main shaft lower gear 10, clutch coupling constitute present embodiment.Main shaft cogs and is connected with swivel nut 8 by connector in 9 the center pit, link by screw thread and main shaft 11 in the swivel nut 8, the operator presses down change lever 25, spline gear 6 and main shaft cog and 9 are meshed, fixed gear 22 and 10 engagements of main shaft lower gear, and spline gear 6 rotates, driving main shaft cogs and 9 rotates, swivel nut 8 rotates, and main shaft lower gear 10 gear 22 that is fixed is locked, can only drive main shaft 11 and move up and down along the keyway on the main shaft lower gears 10.The last push-jump handle 25 that changes of operator, spline gear 6 is meshed with main shaft lower gear 10, and spline gear 6 rotates, and drives main shaft lower gear 10 and rotates, and drives main shaft 11 and rotates.With key connecting sensor tie-plate 14 is installed in main shaft 11 lower ends, sensor tie-plate 14 lower ends are equipped with crosshead shoe 15 by thread connection, and the structure of crosshead shoe 15 is identical with the structure of the cross coupler of interlaminar bonding strength tester for pavement.Be connected to torque sensor 16 in crosshead shoe 15 lower ends with binding, the model of torque sensor 16 is JN338, be the market sale commodity, torque sensor 16 is connected with Programmable Logic Controller 13 by lead, and torque sensor 16 is used to gather the torque of bitumen mixture specimen.Be connected to shear test block installing mechanism 17 in torque sensor 16 lower ends with binding, the lower end of shear test block installing mechanism 17 can stick with glue and connect bitumen mixture specimen, carries out the rotational shear power test of bitumen mixture specimen.
In Fig. 2,3, the shear test block installing mechanism 17 of present embodiment is made of shearing coupling sleeve 17-1, nut 17-2, shearing connecting column 17-3, shearing fixed leg 17-4, shear test block tie-plate 17-5, shearing slide post 17-6 connection.The upper end of shearing coupling sleeve 17-1 connects with the lower end of torque sensor 16 with key, the upper end of shearing connecting column 17-3 is equipped with key, key can move up and down in the axial keyway of shearing coupling sleeve 17-1, make that shearing connecting column 17-3 moves up and down in shearing coupling sleeve 17-1, outside the lower end of shearing coupling sleeve 17-1, nut 17-2 is arranged by thread connection, nut 17-2 stops key, makes that the upper end of shearing connecting column 17-3 can not be from shearing in the coupling sleeve 17-1.In the key slot chamber of the lower end of shearing connecting column 17-3, be welded with and shear slide post 17-6.The central hole location of shear test block tie-plate 17-5 upper surface is welded with 4 shearing fixed leg 17-4 symmetrically, when testing, the bituminous concrete test specimen upper surface of taking a sample on asphalt roads sticks with glue the lower surface that is connected on shear test block tie-plate 17-5, when shearing connecting column 17-3 rotation, shearing slide post 17-6 is sheared fixed leg 17-4 to be stopped, shearing the torque of connecting column 17-3 passes on the bitumen mixture specimen, torque sensor 16 receptions are added to the bitumen mixture specimen torque conversion and become electric signal to output to Programmable Logic Controller 13, Programmable Logic Controller 13 calculates by the program of prior setting, result of calculation is outputed to display 12, and display 12 demonstrates result of calculation.When sampling is tested at the scene, can choose 10~15 shear test block tie-plate 17-5,1 bitumen mixture specimen of lower surface bonds at each shear test block tie-plate 17-5, can carry out the test of 10~15 bitumen mixture specimens in the short period of time, the utility model is compared with interlaminar bonding strength tester for pavement, and effect improves 10~15 times.
Embodiment 2
At Fig. 1,4, in 5, the torque sensor 16 of crosshead shoe 15 lower ends connection among the embodiment 1 and the shear test block installing mechanism 17 of torque sensor 16 lower ends are taken down, use key connecting pulling force sensor 26 in crosshead shoe 15 lower ends, the pulling force sensor 26 of present embodiment is a static sensor, model is JN338F, be the commodity of selling on the market, also can adopt the force transducer of other model, adopt the force transducer of different ranges, can survey the power that varies in size, pulling force sensor 26 is connected with Programmable Logic Controller 13 by lead, and pulling force sensor 26 is used to gather the pulling force signal of bitumen mixture specimen.Be connected to pulling force test specimen installing mechanism 27 in pulling force sensor 26 lower ends with binding, the lower end of pulling force test specimen installing mechanism 27 can stick with glue bitumen mixture specimen, carries out the tensile test of bitumen mixture specimen.
The pulling force test specimen installing mechanism 27 of present embodiment connects upward by sensor connecting column 27-1, loop chain 27-2, loop chain connecting column 27-3, drawing test specimen, and cover 27-4, drawing test specimen connect trap 27-5, drawing test specimen connecting column 27-6, drawing test specimen tie-plate 27-7 connection constitutes.The upper end of sensor connecting column 27-1 links by screw thread and pulling force sensor 26, lower end at sensor connecting column 27-1 connects with the upper end of loop chain 27-2 with the screw threads for fastening connector, the lower end of loop chain 27-2 connects with the upper end of loop chain connecting column 27-3, the lower end of loop chain connecting column 27-3 is installed in the connection of drawing test specimen and goes up in the cover 27-4, the drawing test specimen connects the 27-5 that traps and connects with the drawing test specimen and overlap 27-4 and pass through thread connection, the drawing test specimen connects the 27-5 that traps and by thread connection drawing test specimen connecting column 27-6 is installed, and the lower end welding of drawing test specimen connecting column 27-6 is connected with drawing test specimen tie-plate 27-7.When carrying out pull-out test, the bituminous concrete test specimen upper surface of taking a sample on asphalt roads sticks with glue the lower surface that is connected on drawing test specimen tie-plate 27-7, when drawing test specimen connecting column 27-6 moves up and down, the pulling force of drawing test specimen connecting column 27-6 passes on the bitumen mixture specimen, pulling force sensor 26 receptions are added to bitumen mixture specimen pulling force conversion of signals and become electric signal to output to Programmable Logic Controller 13, Programmable Logic Controller 13 calculates by the program of prior setting, result of calculation is outputed to display 12, and display 12 demonstrates result of calculation.When sampling is tested at the scene, can choose 10~15 drawing test specimen tie-plate 27-7 that weld with drawing test specimen connecting column 27-6,1 bitumen mixture specimen of lower surface bonds at each drawing test specimen tie-plate 27-7, can carry out the test of 10~15 bitumen mixture specimens in the short period of time, the utility model is compared with interlaminar bonding strength tester for pavement, and effect improves 10~15 times.The connecting relation of other parts and parts is identical with embodiment 1.
Embodiment 3
In embodiment 1, the central hole location of shear test block tie-plate 17-5 upper surface is welded with 2 shearing fixed leg 17-4 symmetrically.The connecting relation of other parts and parts is identical with embodiment 1.