Conveyors: power-driven – Conveyor section – Pusher conveyor and separate load support surface
Patent
1995-07-03
1997-06-17
Dayoan, D. Glenn
Conveyors: power-driven
Conveyor section
Pusher conveyor and separate load support surface
198749, B65G 2504
Patent
active
056389426
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a scraper intended in particular for the transfer of pulverulent or granular materials.
It also concerns a scraping framework which includes a series of scrapers according to the invention and in which the introduction of the materials to be transferred is performed laterally with respect to the scraping framework.
Furthermore, the present invention concerns a pulverulent or granular materials transfer installation, in particular for the recovery of blasting materials such as sand, using two scraping frameworks according to the invention.
Finally, the object of this invention is a moveable cellular booth for an external site, comprising a materials transfer installation in accordance with the invention.
In many industries, certain manufacturing stages need to have at their disposal, at ground level, installations for the transfer of pulverulent or granular materials in order to be able to recover the latter or to eliminate them.
French patent FR 2 655 031 filed by the applicant already describes a scraper including a comb-shaped metal truss and a flexible elastomer blade glued against one face of an upper crossbar of the truss. This patent also describes a scraping framework including several scrapers arranged transversally between two parallel girders and performing a back and forth movement so as to transfer the materials, such as blast sand, contained within recovery chutes.
These scrapers are only active in one direction of displacement, when the displaced material pushes the flexible blade against the metal truss.
The scraping frameworks are arranged parallel to one another on the ground of user installations. At their materials discharge end, they open into a transversal chute equipped with an identical scraping framework located beneath the longitudinal chutes in such a way that the material accumulated at the ends falls into the transversal chute. The latter generally opens into the base of a recycling device such as a bucket elevator.
Such installations require a significant amount of foundation work, in particular the digging of a pit in the ground in order to arrange the transversal chutes at a lower level, beneath the longitudinal chutes.
Likewise, the base of the elevator must be driven into the ground so as to be located beneath the transversal chutes.
The purpose of the present invention is to eliminate the above-mentioned disadvantages of installations for the transfer of pulverulent or granular materials by means of a swinging movement. In particular, it makes it possible to simplify the setting up of these installations and to make their use far more flexible.
The scraper which the invention is concerned with is arranged between two parallel girders and comprises a metal truss in the shape of a comb whose teeth are directed downwards and a flexible blade covering said teeth and glued against one face of an upper crossbar of the truss.
According to the invention, the scraper is characterised in that the metal truss has a first part substantially perpendicular to said girders and at least one second part joined to one end of the first part and forming an elbow with the first part, the flexible blade being glued against one face directed towards the interior of the truss's elbow.
The elbowed structure of the scraper makes it possible to displace the granular or pulverulent materials slantwise within the scraping framework and to bring back the materials so that they are facing the first part of the truss, perpendicular to the girders.
The scraper according to the invention thus makes it possible to eliminate the excess of materials on the sides of the scraping framework.
According to a second aspect of the invention, a scraping framework comprises two parallel girders between which are arranged scrapers in accordance with the invention performing a back-and-forth movement, the materials to be transferred being introduced laterally into said scraping framework, beneath at least one of the girders.
The scraping framework is characterised in that a second part of
REFERENCES:
patent: 4250988 (1981-02-01), Miaskoff
patent: 5199549 (1993-04-01), Lutke
Dayoan D. Glenn
Getrasur
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