Classifying – separating – and assorting solids – Sifting – With liquid treatment
Patent
1995-02-23
1996-10-01
Dayoan, D. Glenn
Classifying, separating, and assorting solids
Sifting
With liquid treatment
209283, B07B 104
Patent
active
055604951
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL AREA
The invention deals with an apparatus for bringing out or extracting aggregate from a reprocessing installation of residual concrete.
The reprocessing of unused quantities of residual concrete in concrete processing or transporting plants is increasingly demanded because of reasons of environmental protection. In addition, reprocessing is also associated with large economical advantages, since the accumulating ingredients such as gravel- and sand-ingredients and water consumed during the reprocessing can be reused in the manufacture of new concrete.
STATE OF THE ART
Such a conveyance device of the worm conveyor type is known from the German Utility Model 91 00 176. The conveyance trough of this worm conveyor is configured as a flexible elastic path. The conveyor protrudes with its lower end into a bin used for reprocessing the residual concrete. The worm conveyor conveys the purified aggregates, meaning the sand- and gravel-ingredients obliquely upwards out of the container. This enables to achieve the desired high dumping height of the aggregate. The recycling water conveyed out of the worm conveyor together with the discharge of the aggregate flows in the rearward direction again back into the bin. Since the shaft of this worm conveyor is supported externally of the charging region of the sand- and gravel-ingredients, which have to be conveyed outwardly, said shaft does not come into contact with the material being conveyed and virtually also not with the recycling water. This assures a high degree of maintenance freedom of this worm conveyor with a simultaneous high functionality. This type of worm conveyor produces an intermixture of sand- and gravel-ingredients.
DESCRIPTION OF THE INVENTION
Proceeding from the prior state of the art, the invention is based upon the task, of indicating a possibility for reprocessing residual concrete, by means of which the individual grain fractions of the aggregate to be processed, meaning in particular sand- and gravel-ingredients, can be separated from one another in as economical a manner as possible.
This invention is defined in the characteristics of patent claim 1. The conveyor with a conveyor arrangement of the worm conveyor type known in the state of the art is accordingly distinguished in that the conveyor trough in the worm conveyor configured in the form of a flexible elastic path is provided with apertures, which are suitable for permitting a specific grain size of the aggregate conveyed away by the worm conveyor to pass through. Thus it is achieved that for instance the gravel ingredients and thus the grain sizes having a larger diameter of the recyclable aggregate are collected on top out of the worm conveyor, while at another point of the worm conveyor a smaller grain size, for instance the sand ingredients of the recyclable aggregate fall out separately from the gravel ingredients from the worm conveyor. This enables to separate the gravel- and sand-ingredients of the aggregate collected during reprocessing of the residual concrete with an extraordinarily small effort and expense. In this case an optimum grain composition of the newly to be produced concrete is assured when this aggregate is used again.
Systems of screening installations for separating the different grain fractions are known in connection with the extraction of sand and gravel from sand- and gravel-pits. Economical considerations stand counter to the use of these sifting installations in the reprocessing of residual concrete, since such sifting installations would greatly increase the expenses of a reprocessing installation of residual concrete. On the other hand the use of these sifting or screening installations is not possible as a rule also due to design reasons, without a considerable additional effort or expense. Thus these sifting installations would have to be disposed beneath the worm conveyor, which would entail that the conveyor should be installed sufficiently high above the ground in the region of this sifting device. Namely sufficient drop or dumping
REFERENCES:
patent: 2044043 (1936-06-01), Anderson
patent: 2491912 (1949-12-01), Walker
patent: 3249220 (1966-05-01), Bakke
patent: 3251467 (1966-05-01), Bakke
patent: 3279597 (1966-10-01), Reinhall
patent: 3397778 (1968-08-01), Karlsson
patent: 3788566 (1974-01-01), Morris, Jr.
patent: 3886063 (1975-05-01), Friesz
patent: 3981738 (1976-09-01), Rao et al.
patent: 4126541 (1978-11-01), Orzechowski
patent: 4396501 (1983-08-01), Morey
patent: 5202416 (1993-04-01), Van Zee
LandOfFree
Transporter for aggregate produced during reprocessing of residu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transporter for aggregate produced during reprocessing of residu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transporter for aggregate produced during reprocessing of residu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1497635