CN203164048U - Asphalt mixture direct tensile testing device for avoiding eccentric tension - Google Patents
Asphalt mixture direct tensile testing device for avoiding eccentric tension Download PDFInfo
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- CN203164048U CN203164048U CN 201320185776 CN201320185776U CN203164048U CN 203164048 U CN203164048 U CN 203164048U CN 201320185776 CN201320185776 CN 201320185776 CN 201320185776 U CN201320185776 U CN 201320185776U CN 203164048 U CN203164048 U CN 203164048U
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- hinged seat
- test
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- electromagnetic force
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Abstract
The utility model discloses an asphalt mixture direct tensile testing device for avoiding eccentric tension. The asphalt mixture direct tensile testing device comprises a testing part, a tested part installed in the testing part and an electromagnetic force control part, wherein the testing part comprises a spherical upper hinged seat and a spherical lower hinged seat matched with the spherical upper hinged seat, the spherical lower hinged seat is connected with an ingot through a connecting piece, the testing part is installed between the spherical upper hinged seat and the spherical lower hinged seat, and the electromagnetic force control part is connected with the ingot. Due to the spherical hinged seats which can flexibly rotate, when the testing part is tensioned in the testing process, the testing part can naturally droop by virtue of gravity to prevent an eccentric force from being applied on the tested part in a tensile test, so that testing results are accurate. In addition, the asphalt mixture direct tensile testing device is simple in structure, convenient and rapid to operate, economical and practical, and can be used for providing reliable testing data and reducing the testing error.
Description
Technical field
The utility model relates in the road engineering bituminous pavement fatigue crack life prediction based on local train and studies direct stretching field, relates in particular to a kind of asphalt direct tensile test device of avoiding eccentric tension.
Background technology
Direct tensile test can be used for the evaluation of asphalt crack resistance at low-temperature, and sample dimensions is 38.1mm * 38.1mm * 101.6mm.Pilot system loads stretching with rate of extension slowly under cryogenic conditions, can estimate Cracking Temperature by intensity-temperature relation curve that test obtains; Also can determine the stress-plastic strain relation of asphalt by direct tensile test, thereby set up local train and the relation between fatigue lifetime that estimate the bituminous pavement fatigue crack life-span, sample dimensions is 50mm * 50mm * 250mm.
Yet in these two kinds of tests, the girder test specimen is fixed on the anchor clamps, because the iron plate on the girder test specimen top and bottom may be not parallel after adhering to, this just causes the girder test specimen to be subjected to the effect of eccentric pulling force in the process of being stretched, to make gained actual tests result not conform to the expection test findings like this, cause test figure inaccurate, can not use.
The utility model content
At above-mentioned defective or deficiency, the utility model provides a kind of asphalt direct tensile test device of avoiding eccentric tension.
The technical solution of the utility model is:
Comprise test component, be installed on unit under test and electromagnetic force control assembly in the test component, wherein, test component comprises the spherical hinged seat of going up, and with sphere that hinged seat on the sphere matches under hinged seat, spherical hinged seat down is connected with casting pig by web member, and test component is installed on the spherical hinged seat and spherical down between the hinged seat of going up; The electromagnetic force control assembly is connected with casting pig.
Hinged seat all is equipped with for the anchor clamps that clamp unit under test in the hinged seat down with spherical on the described sphere.
Described unit under test comprises that the upper end of girder test specimen, girder test specimen is pasted with iron plate, and the lower end of girder test specimen (4) is pasted with ground surface material.
Described electromagnetic control components comprises electromagnet, and the electromagnetic force controller that is connected with electromagnet, the magnetic force display screen that described electromagnetic force controller is provided with switch, electromagnetic force adjusting knob and is used for showing the size electricity of electromagnetic force.
Described electromagnet is connected with test platform.
Described web member is lower link, and spherical upper end of going up hinged seat is equipped with upper connecting rod.
The utility model provides a kind of asphalt direct tensile test device of avoiding eccentric tension, by in test component, arrange hinged seat on the sphere and with sphere that hinged seat on the sphere matches under hinged seat, because rotating flexibly, spherical free bearing can make test component in test process, when tension, the time can lean on gravity sagging naturally, eccentric force acts on the unit under test when avoiding tension test, make test result more accurate, in addition, the utility model is simple in structure, and simple operation is economical and practical, reliable detection data are provided, reduce data error.
Description of drawings
Fig. 1 is the structural representation of the asphalt direct tensile test device of avoiding eccentric tension that provides of the utility model;
Fig. 2 is the rear view of the asphalt direct tensile test device of avoiding eccentric tension that provides of the utility model.
Among the figure, 1 is upper connecting rod; 2 is the spherical free bearing of going up; 3 is anchor clamps; 4 is the girder test specimen; 5 is ground surface material; 6 is lower link; 7 is casting pig; 8 is electromagnet; 9 is test platform; 10 is iron plate; 11 is switch; 12 is the electromagnetic force adjusting knob; 13 is the electromagnetic force controller; 14 is the electromagnetic force display screen; 15 is spherical hinged seat down.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
Referring to Fig. 1, shown in 2, the utility model provides a kind of asphalt direct tensile test device of avoiding eccentric tension, comprise test component, be installed on the unit under test in the test component, and electromagnetic force control assembly, wherein, test component comprises the spherical hinged seat 2 of going up, and with sphere that hinged seat 2 on the sphere matches under hinged seat 15, hinged seat 2 is provided with upper connecting rod 1 on the sphere, upper connecting rod 1 and MTS(Mechanical Testing Simulation, mechanical test and simulation) testing machine is connected, hinged seat 2 all is equipped with for the anchor clamps 3 that clamp unit under test in the hinged seat 15 down with sphere on the sphere, unit under test comprises girder test specimen 4, ground surface material girder test specimen 4 after cutting, its size is 50mm * 50mm * 250mm, the upper end of girder test specimen 4 is pasted with iron plate 10, and the lower end of girder test specimen 4 is pasted with ground surface material 5, and this three bonds by seccotine.Iron plate 10 is connected with the spherical anchor clamps of going up on the hinged seat 2, and ground surface material 5 is connected with anchor clamps in the spherical following hinged seat 15.Spherical hinged seat 15 down is connected with casting pig 7 by lower link 6, and casting pig 7 is patty, and test component is installed on the spherical hinged seat 2 and spherical down between the hinged seat 15 of going up; The electromagnetic force control assembly is connected with casting pig 7, described electromagnetic control components comprises electromagnet 8, and the electromagnetic force controller 13 that is connected with electromagnet 8, wherein, electromagnet 8 is patty, the magnetic force display screen 14 that described electromagnetic force controller 13 is provided with switch 11, electromagnetic force adjusting knob 12 and is used for showing the size electricity of electromagnetic force.Electromagnet 8 is connected with test platform 9 by screw, energising back and 7 stable connections of casting pig, the effect of electromagnetic component be test component be in nature sagging after, make electromagnet 8 and 7 stable connections of casting pig by the size of regulating electromagnetic force, finish until experiment, described support component comprises test platform 9, is used for supporting the top test unit.
The course of work of the present utility model is:
1) earlier hinged seat on the ball-type 2 is connected with the MTS testing machine by upper connecting rod 1, two groups of 2 of spherical hinges is coated with spreads butter, make it more flexible.
2) the good girder test specimen that will bond is placed on the anchor clamps 3, then lower clamp is placed.Keep casting pig 7 not contact electromagnet 8.
3) open switch 11, regulate electromagnetic force adjusting knob 12, the varying electromagnetic force size, ascending, till whole test component is sagging naturally.
4) close switch 11, manual adjustments casting pig 7 is vertically placed its lower end, will keep the test component on its top not mobile in the adjustment process.
5) slowly open the MTS testing machine, test component is slowly moved down until lucky contact electromagnet, open switch 11 then, regulate electromagnetic force adjusting knob 12, the varying electromagnetic force size satisfies in the process of the test it and does not separate with test component.
6) MTS testing machine test parameter is set, begins test.Close swap switch 11 after the off-test earlier, withdraw all test components then.
The utility model compared with prior art has the following advantages:
(1) test unit of the present utility model has respectively been installed one and has been rotated flexible spherical free bearing on last lower clamp, can make test component not be subjected to the effect of eccentric force in the tension process.
(2) test unit of the present utility model is equipped with electromagnetic control components, can make the sagging test component bottom of nature stably be fixed on the test platform.
(3) test unit of the present utility model is simple in structure, and simple operation is economical and practical, and reliable test figure is provided, and reduces test error.
Claims (6)
1. asphalt direct tensile test device of avoiding eccentric tension, it is characterized in that: comprise test component, be installed on unit under test and electromagnetic force control assembly in the test component, wherein, test component comprises the spherical hinged seat (2) of going up, and with sphere that hinged seat (2) on the sphere matches under hinged seat (15), spherical hinged seat (15) down is connected with casting pig (7) by web member, and test component is installed on the spherical hinged seat (2) and spherical down between the hinged seat (15) of going up; The electromagnetic force control assembly is connected with casting pig (7).
2. the asphalt direct tensile test device of avoiding eccentric tension according to claim 1 is characterized in that: all be equipped with for the anchor clamps (3) that clamp unit under test in hinged seat on the described sphere (2) and the spherical hinged seat (15) down.
3. the asphalt direct tensile test device of avoiding eccentric tension according to claim 1, it is characterized in that: described unit under test comprises girder test specimen (4), the upper end of girder test specimen (4) is pasted with iron plate (10), and the lower end of girder test specimen (4) is pasted with ground surface material (5).
4. the asphalt direct tensile test device of avoiding eccentric tension according to claim 1, it is characterized in that: described electromagnetic control components comprises electromagnet (8), and the electromagnetic force controller (13) that is connected with electromagnet (8), the magnetic force display screen (14) that described electromagnetic force controller (13) is provided with switch (11), electromagnetic force adjusting knob (12) and is used for showing the size electricity of electromagnetic force.
5. the asphalt direct tensile test device of avoiding eccentric tension according to claim 4, it is characterized in that: described electromagnet (8) is connected with test platform (9).
6. the asphalt direct tensile test device of avoiding eccentric tension according to claim 1, it is characterized in that: described web member is lower link (6), and spherical upper end of going up hinged seat (2) is equipped with upper connecting rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320185776 CN203164048U (en) | 2013-04-12 | 2013-04-12 | Asphalt mixture direct tensile testing device for avoiding eccentric tension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320185776 CN203164048U (en) | 2013-04-12 | 2013-04-12 | Asphalt mixture direct tensile testing device for avoiding eccentric tension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203164048U true CN203164048U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320185776 Expired - Fee Related CN203164048U (en) | 2013-04-12 | 2013-04-12 | Asphalt mixture direct tensile testing device for avoiding eccentric tension |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203164048U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136557A (en) * | 2015-07-21 | 2015-12-09 | 哈尔滨工业大学 | Asphalt dynamic shear parameter test device and test method thereof |
| CN108562488A (en) * | 2017-12-27 | 2018-09-21 | 内蒙古工业大学 | The device and operating method of single fiber puller system fixing concrete sample |
-
2013
- 2013-04-12 CN CN 201320185776 patent/CN203164048U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136557A (en) * | 2015-07-21 | 2015-12-09 | 哈尔滨工业大学 | Asphalt dynamic shear parameter test device and test method thereof |
| CN108562488A (en) * | 2017-12-27 | 2018-09-21 | 内蒙古工业大学 | The device and operating method of single fiber puller system fixing concrete sample |
| CN108562488B (en) * | 2017-12-27 | 2020-06-19 | 内蒙古工业大学 | Device for fixing concrete sample by single fiber tensile machine and operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20160412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |