Automatic face-changing asphalt mixture Marshall compaction test apparatus

Abstract

The invention discloses an automatic face-changing asphalt mixture Marshall compaction test apparatus. The apparatus includes a base, a compaction platform, a compaction unit, a compaction power unit,an asynchronous lifting mechanism and a pneumatic automatic face changing mechanism; the asynchronous lifting mechanism comprises a lifting motor and asynchronous lifting lead screws, the lifting motor is drivingly connected with the asynchronous lifting lead screws through a transmission belt, and an upper sleeve and a rotating clamping device are fixed between the asynchronous lifting screws; the pneumatic automatic face changing mechanism comprises a rotary cylinder and an air compressor, and the rotating clamping device is controlled by the rotary cylinder to perform an overturn action; the compaction unit comprises a compaction hammer, and the compaction hammer is located directly above the rotating clamping device; the compaction power unit comprises a transmission motor and a transmission chain, the transmission motor drives the transmission chain to run, the transmission motor drives the transmission chain to generate power for the compaction hammer, and the compaction hammeris raised to a certain height, so that the compaction hammer falls as a free falling body to complete compaction work. The apparatus enables the compaction time to be shortened, and enables the working efficiency to be increased.

Description

technical field [0001] The invention relates to a Marshall compaction device, in particular to a Marshall compaction instrument for automatic face-changing asphalt mixture. Background technique [0002] The existing Marshall compaction equipment is old and outdated equipment designed many years ago, but it is widely used in highway engineering because of its easy operation and maintenance and good adaptability; Many problems were also exposed during the process. For example, after one-side compaction, the compaction hammer needs to be manually lifted and fixed, and then the Marshall test piece should be compacted again by changing the surface. The work efficiency is low and there are potential safety hazards. [0003] Moreover, during the compaction process, a longer operation time will reduce the temperature of the asphalt mixture in the test piece, and some testers with immature operating skills will perform this operation for a longer time, which will easily cause the tem...

AI Technical Summary

Problems solved by technology

[0002] The existing Marshall compaction equipment is old and outdated equipment designed many years ago, but it is widely used in highway engineering because of its easy operation and maintenance and good adaptability; Many problems were also exposed during the process. For example, after one-sided compaction is completed, the compaction hammer needs to be manually lifted and fixed, and then the Marshall test piece is replaced and compacted again. The work efficiency is low and there are potential safety hazards.

[0003] Moreover, during the compaction process, a longer operation time will reduce the temperature of the asphalt mixture in the test piece, and some testers with immature operating skills will perform this operation for a longer time, which will easily cause the temperature of the asphalt mixture to be lower than the specification Another problem brought about by the standard compaction temperature and the extension of the operating time is that the heating time of the asphalt mixture kept in the oven becomes longer, and the long-term high temperature has a great impact on the aging of the asphalt. The combination of the above problems may eventually lead to Marshall Inaccurate test results

[0004] In addition to the corresponding test quality problems, it will also bring some safety problems. When the compaction hammer and the Marshall test piece are turned over, there is a danger of the experimenter being injured and scalded.

[0005] There are also many shortcomings in other existing improved Marshall compaction instruments. For example, some equipment does not realize automatic surface change, but the Marshall compaction instrument that can automatically change the surface after the surface change is inaccurate. The positioning of the base and the upper sleeve is not accurate, and the compaction hammer has deviations And other problems, causing a lot of operational trouble

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