ITRI20080009A1 - MACHINERY FOR RECOVERY OF CONSTRUCTION WASTE AND DEMOLITION - Google Patents

Description

MACHINERY FOR THE RECOVERY OF CONSTRUCTION AND DEMOLITION WASTE

The recycling process for building materials is divided into four phases:

1) formation of waste on site;

2) the collection of discarded products;

3) waste treatment

4) the reuse of recycled products.

After the Ronchi decree which classifies waste from construction and demolition operations through codes that are used to fill in the form

(MUD) these have given the possibility to estimate the quantities produced by the demolition industry, of which 92% is represented by microdemolitions.

It is for this reason that after carrying out research to identify machinery suitable for the recovery of waste directly on site, we realized that the few existing on the market are not up to the requirements as they create considerable inconveniences, so we continue to dispose of waste materials with costs and times that weigh on companies.

The major drawbacks found on the machinery analyzed are:

noise of appliances that disturb anyone near the workplace; production of large quantities of more or less fine powders and coming to the products, it is impossible to obtain materials with different grain sizes according to the needs of the site without intervening on the machine sieves with fairly long and expensive operations.

With the mill studied and patented here, the aforementioned drawbacks have been solved, working on the shredding system, intervening on the emission of dust and, last but not least, on soundproofing, solving the problem of the granulometry of recycled materials without disassembling the machinery. and replace the relative sieves.

This mill, from the word itself, not crusher, by means of its horizontal multi-blade rotor, from a minimum of sixteen to a maximum of thirty-two, which can be adjusted on the projection with simple operator interventions and, very importantly, can be used eight times with only the 90 ° rotation operation for the first four times and the disassembly and repositioning operation, overturning them, and then always with the 90 ° rotation operation.

The possibility of carrying out the above operations allows a considerable saving on maintenance costs and partially eliminates spare parts stocks.

Another important finding in the construction of this mill is that of working, due to the centrifugal force of the rotor, in impact with the material against the material which, until unrefined, remains lying on the fixed blades of the grinding body.

Vibrations during operation are absorbed by rubber insulators which prevent their transmission to the structure and body. In the hopper, which is not used in existing shredders on the market, a â € œa crank handleâ € system is applied which allows continuous feeding of the rotor without the intervention of the operator.

The mill thus conceived, has two outlets for the ground material, in order to have the possibility of reusing it according to the needs of the bricklayer, with greater granulometry for the closure of traces and other coarse work, with less granulomertria (sand type) for the finishes.

Returning to the study of the mill described, we can assert that with the positioning of the blades staggered on the rotor, the production is increased compared to other mills with whole blades and compared to jaw crushers, reducing energy consumption per kg of product and also in the case insertion of larger sizes into the hopper avoids machine stops due to clogged rotor.

With the mill, patented, in addition to the aforementioned peculiarities, we can speak of an innovative technique as no mill and / or crusher, existing on the market, allow the release of material with two grain sizes, which can also be adjusted by acting on the offset of the holes in the grids (sieves) by means of a ring nut placed on the panel of the machine even during motion.

Thanks to the dust extraction system designed and developed for the elimination of these, it allows you to operate even without annoying masks.

In fact, the suction unit starts at the same time as the rotor and, creating a depression of the machine, leads the particles towards the bag filter, self-cleaning, and after having deposited the coarser dust here, the air passes into a further filter placed on the fairing of the machine itself and then returns to the completely clean environment.

Claims (2)

CLAIMS: 1) The machinery for the recovery of construction and demolition waste consists of a particularly shaped and compact mill for use in small environments. 2) The machinery according to rev. 1 consists of a rotor on which steel pads are mounted which are positioned alternately and which can be moved both axially and radially to work more or less hard materials. (fig. 1) 3) The pads for the mounting system and their shape can be used eight times before being replaced, significantly lowering maintenance costs. (fig. 2) 4) The machinery according to rev. 1 by means of the adjustment ring nut (fig. 3) acting on the sieves, it can grind to different grain sizes without the need for further interventions in order to prepare the material according to the needs of the bricklayer. 5) The machinery according to rev. 1 is equipped with a suction system that allows the abatement and recovery of dust. 6) The machinery according to rev. 1 by means of the trapezoidal transmission belts allows the vibration of the screen with the double sieves and that of the loading hopper with the crank rod system avoiding the intervention of the operator to push the material towards the rotor. 7) The machinery according to rev. 1 is made up of casings coated with sound-absorbing material and rubber seals to eliminate vibrations and minimize noise.