CN101393195B - Low-temperature breaking test device by freezing for bituminous mixture - Google Patents
Low-temperature breaking test device by freezing for bituminous mixture Download PDFInfo
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- CN101393195B CN101393195B CN2008101373668A CN200810137366A CN101393195B CN 101393195 B CN101393195 B CN 101393195B CN 2008101373668 A CN2008101373668 A CN 2008101373668A CN 200810137366 A CN200810137366 A CN 200810137366A CN 101393195 B CN101393195 B CN 101393195B
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- slide plate
- flange
- dovetail groove
- holder
- test device
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Abstract
The invention relates to a low-temperature freeze-fracturing test device for an asphalt mixture, and relates to a test device for the asphalt mixture. The device aims to solve problems that a frame for the asphalt mixture is easy to distort and gears have low accuracy in the prior test device. Two test piece fixtures are arranged in a first vertical dovetail groove and a second vertical dovetail groove respectively, a first sliding plate and a second sliding plate are sleeved on four guide rails, one end of a nut is connected with the second sliding plate through a connecting piece, a first fixed base and a second fixed base are fixed at both ends of the four guide rails respectively, one end of a connecting rod is fixedly connected with the end surface of the first sliding plate, while the other end of the connecting rod passes through a first central hole on the first fixed base and is connected with a force measurement sensor, one end of each of two supporting columns is fixedly connected with the second fixed base respectively, while the other end of each of two supporting columns is fixedly connected with a first flange, a motor is fixed on the first flange, and an output end of the motor is connected with a ball screw. The device can perform real-time displacement compensation for the deformation of test pieces, and eliminate the influence of a measurement system on the test result along with the deformation of the test pieces when the temperature is reduced.
Description
Technical field
The present invention relates to a kind of asphalt test unit.
Background technology
At present, the frame of existing asphalt test unit mostly adopts special material (indium steel) manufacturing, and this material price costliness along with the reduction of temperature, also certain drawdown deformation can take place, and test findings is had certain influence; Gear drive is mostly adopted in the transmission of existing asphalt test unit, and precision is not high.
Summary of the invention
The objective of the invention is the yielding and not high problem of gear-driven accuracy, a kind of low-temperature breaking test device by freezing for bituminous mixture is provided for the frame that solves existing asphalt test unit.
The present invention includes four guide rails, first holder, first slide plate, two pillars, ball-screw, first flange, motor, two piece fixtures, second holder, second slide plate, connecting link and force cell, first slide plate is provided with the first vertical dovetail groove, second slide plate is provided with the second vertical dovetail groove, one end of each piece fixture is provided with dovetail, first slide plate and second slide plate are oppositely arranged, the first vertical dovetail groove and the second vertical dovetail groove are over against setting, dovetail on two piece fixtures is contained in the first vertical dovetail groove respectively and in the second vertical dovetail groove, first slide plate and second slide plate are sleeved on four guide rails, nut one end on the ball-screw is connected with second slide plate by web member, the other end of ball-screw passes second center pit on second holder, first holder and second holder are packed in the two ends of four guide rails respectively, one end of connecting link and the end face of first slide plate are affixed, first center pit that the other end of connecting link passes on first holder is connected with force cell, one end of two pillars is affixed with second holder respectively, the other end of two pillars and first flange are affixed, motor is packed on first flange, and the output terminal of motor is connected with ball-screw.
The invention has the beneficial effects as follows: the present invention utilizes ball-screw to drive second slide plate real-time displacement compensation is carried out in the distortion of test specimen, the partial-length of having controlled test specimen is constant, eliminated measuring system and deformed to the influence of test findings with temperature reduction test specimen, the real-time displacement compensation realizes by program.The present invention adopts ball-screw, makes bearing accuracy height, stable drive.
Description of drawings
Fig. 1 is the one-piece construction stereographic map of test unit of the present invention, and Fig. 2 utilizes the test specimen centering device that test specimen 19 and piece fixture 11 are sticked with glue structural representation after connecing firmly, and Fig. 3 is ball-screw 5 and second slide plate, 13 syndeton synoptic diagram.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 3, present embodiment comprises four guide rails 1, first holder 2, first slide plate 3, two pillars 4, ball-screw 5, first flange 7, motor 10, two piece fixtures 11, second holder 12, second slide plate 13, connecting link 14 and force cell 15, first slide plate 3 is provided with the first vertical dovetail groove 3-1, second slide plate 13 is provided with the second vertical dovetail groove 13-1, one end of each piece fixture 11 is provided with dovetail 11-2, first slide plate 3 and second slide plate 13 are oppositely arranged, the first vertical dovetail groove 3-1 and the second vertical dovetail groove 13-1 are over against setting, utilize the test specimen centering device earlier with on the test specimen 19, the lower end is placed in the groove 11-1 of two piece fixtures 11, test specimen 19 and piece fixture 11 sticked with glue connect firmly, and the axle center that guarantees test specimen 19 is vertical with the end face of piece fixture 11, sees Fig. 2; With the assembly of above-mentioned bonding test specimen 19 and piece fixture 11 wherein two dovetail 11-2 at two ends be contained in respectively in the first vertical dovetail groove 3-1 with the second vertical dovetail groove 13-1 in, first slide plate 3 and second slide plate 13 are sleeved on four guide rails 1, nut 5-1 one end on the ball-screw 5 is connected with second slide plate 13 by web member, the other end of ball-screw 5 passes the second center pit 12-1 on second holder 12, first holder 2 and second holder 12 are packed in the two ends of four guide rails 1 respectively, one end of connecting link 14 and the end face of first slide plate 3 are affixed, the first center pit 2-1 that the other end of connecting link 14 passes on first holder 2 is connected with force cell 15, one end of two pillars 4 is affixed with second holder 12 respectively, the other end of two pillars 4 and first flange 7 are affixed, motor 10 is packed on first flange 7, and the output terminal of motor 10 is connected with ball-screw 5.Motor 10 is a stepper motor.When test specimen 19 shrinks, first slide plate 3 is slided, the hypotelorism of first slide plate 3 and second slide plate 13, starter motor 10, ball-screw is rotated drive second slide plate 13, make the spacing of the win slide plate 3 and second slide plate 13 return to the original length, the control of motor 10 realizes by programmed control, when test specimen 19 shrank, force cell 15 was measured the pulling force of first slide plate 3 simultaneously.Piece fixture 11 and first slide plate 3 and second slide plate 13 cooperate the mode that adopts dovetail and dovetail groove because dovetail and dovetail groove have the automatic centering function, cooperate the test specimen centering device, only produce axial force in the time of can guaranteeing the test specimen tension.
Embodiment two: in conjunction with Fig. 1 present embodiment is described, the difference of present embodiment and embodiment one is: it also increases shaft coupling 6, and an end of shaft coupling 6 is connected with motor 10 output shafts, and the other end is connected with ball-screw 5.Design makes the present invention easy to loading and unloading like this.Other composition and annexation are identical with embodiment one.
Embodiment three: in conjunction with Fig. 1 present embodiment is described, the difference of present embodiment and embodiment one is: it also increases has second flange, 8, the second flanges 8 to be arranged between the shaft coupling 6 and first flange 7 and is sleeved on two pillars 4.Design makes that motor 10 work are more stable like this.Other composition and annexation are identical with embodiment one.
Embodiment four: in conjunction with Fig. 1 present embodiment is described, the difference of present embodiment and embodiment one is: it also increases has the 3rd flange 9, the three flanges 9 to be arranged between the shaft coupling 6 and second flange 8 and is sleeved on two pillars 4.It is affixed with environmental chamber at low temperature that the 3rd flange 9 is convenient in design like this.Other composition and annexation are identical with embodiment one.
Claims (4)
1. low-temperature breaking test device by freezing for bituminous mixture, it is characterized in that: it comprises four guide rails (1), first holder (2), first slide plate (3), two pillars (4), ball-screw (5), first flange (7), motor (10), two piece fixtures (11), second holder (12), second slide plate (13), connecting link (14) and force cell (15), first slide plate (3) is provided with the first vertical dovetail groove (3-1), second slide plate (13) is provided with the second vertical dovetail groove (13-1), one end of each piece fixture (11) is provided with dovetail (11-2), first slide plate (3) and second slide plate (13) are oppositely arranged, the first vertical dovetail groove (3-1) and the second vertical dovetail groove (13-1) are over against setting, dovetail (11-2) on two piece fixtures (11) be contained in the first vertical dovetail groove (3-1) respectively and the second vertical dovetail groove (13-1) in, first slide plate (3) and second slide plate (13) are sleeved on four guide rails (1), nut (5-1) end on the ball-screw (5) is connected with second slide plate (13) by web member, the other end of ball-screw (5) passes second center pit (12-1) on second holder (12), first holder (2) and second holder (12) are packed in the two ends of four guide rails (1) respectively, the end face of one end of connecting link (14) and first slide plate (3) is affixed, first center pit (2-1) that the other end of connecting link (14) passes on first holder (2) is connected with force cell (15), one end of two pillars (4) is affixed with second holder (12) respectively, the other end of two pillars (4) and first flange (7) are affixed, motor (10) is packed on first flange (7), and the output terminal of motor (10) is connected with ball-screw (5).
2. low-temperature breaking test device by freezing for bituminous mixture according to claim 1 is characterized in that: it also comprises shaft coupling (6), and an end of shaft coupling (6) is connected with motor (10) output shaft, and the other end is connected with ball-screw (5).
3. low-temperature breaking test device by freezing for bituminous mixture according to claim 2 is characterized in that: it also comprises second flange (8), and second flange (8) is arranged between shaft coupling (6) and first flange (7) and is sleeved on two pillars (4).
4. low-temperature breaking test device by freezing for bituminous mixture according to claim 3 is characterized in that: it also comprises the 3rd flange (9), and the 3rd flange (9) is arranged between shaft coupling (6) and second flange (8) and is sleeved on two pillars (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101373668A CN101393195B (en) | 2008-10-22 | 2008-10-22 | Low-temperature breaking test device by freezing for bituminous mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101373668A CN101393195B (en) | 2008-10-22 | 2008-10-22 | Low-temperature breaking test device by freezing for bituminous mixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101393195A CN101393195A (en) | 2009-03-25 |
| CN101393195B true CN101393195B (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101373668A Expired - Fee Related CN101393195B (en) | 2008-10-22 | 2008-10-22 | Low-temperature breaking test device by freezing for bituminous mixture |
Country Status (1)
| Country | Link |
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| CN (1) | CN101393195B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406296B (en) * | 2017-12-29 | 2020-12-11 | 哈尔滨工业大学 | Simple device for radially testing low-temperature performance of asphalt mixture |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357511A (en) * | 2001-05-31 | 2002-12-13 | Civil Engineering Research Institute Of Hokkaido | Centrifugal-force loading apparatus |
| CN2795845Y (en) * | 2005-04-25 | 2006-07-12 | 胡长顺 | Low temperature asphalt force measuring extension meter |
| CN2835987Y (en) * | 2005-11-15 | 2006-11-08 | 汕头市金平区金园荣华机械厂 | Tensile mechanism for bidirectional tensile testing machine |
| CN1888899A (en) * | 2006-07-14 | 2007-01-03 | 西安理工大学 | Low-temperature anticracking performance testing method and its equipment for building materials |
-
2008
- 2008-10-22 CN CN2008101373668A patent/CN101393195B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357511A (en) * | 2001-05-31 | 2002-12-13 | Civil Engineering Research Institute Of Hokkaido | Centrifugal-force loading apparatus |
| CN2795845Y (en) * | 2005-04-25 | 2006-07-12 | 胡长顺 | Low temperature asphalt force measuring extension meter |
| CN2835987Y (en) * | 2005-11-15 | 2006-11-08 | 汕头市金平区金园荣华机械厂 | Tensile mechanism for bidirectional tensile testing machine |
| CN1888899A (en) * | 2006-07-14 | 2007-01-03 | 西安理工大学 | Low-temperature anticracking performance testing method and its equipment for building materials |
Non-Patent Citations (4)
| Title |
|---|
| 冯卡.用低温约束冻断试验方法评价沥青混合料低温抗裂性能.《公路交通科技》.2008,第25卷(第9期),83-86. * |
| 刘涛.沥青混合料低温抗裂性评价方法研究.《同济大学学报》.2002,第30卷(第12期),1468-1471. * |
| 庞辉.沥青混凝土低温性能试验系统开发及沥青混凝土低温性能研究.《中国硕士学位论文数据库》.2006,全文. * |
| 陈敬文.沥青混凝土低温冻断试验.《石油沥青》.1991,46-50. * |
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| CN101393195A (en) | 2009-03-25 |
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