|JP06255797||EARTH AND SAND CARRYING VEHICLE|
|WO/2011/059596||SYSTEM AND METHOD FOR UNLOADING ITEMS|
|JP07206165||LAMINATED LAYER MIXING/SCATTERING METHOD FOR BULK MATERIAL|
Lilienthal, Klaus Rúdiger (15/311, Dr. Derly Monteiro St. -150 Porto Alegre, RS, CEP-91225, BR)
|1.||A system for unloading bulk products comprising a moveable gantry structure 7 moving lengthwise over and longitudinal of the load, carrying a moveable frame 5 suspended from said portico like structure 7 by a mechanical assembly 4 connected to said gantry structure 7 and conferring to said moveable frame 5 a vertical movement, at least one cutting and dragging blade 1 and 2 attached to said moveable frame 5, said blade sliding under said moveable frame in a horizontal movement transversal to the load. A system for unloading bulk products according to claim 1 wherein the moveable gantry structure 7 movement lengthwise over and longitudinal of the load is supported by a plurality of wheels on rails 10. A system for unloading bulk products according to claim 1 wherein said moveable frame 5 is connected to the gantry structure 7 by 4 hydraulic cylinders. A system for unloading bulk products according to claim 1 wherein said cutting and dragging blades 1 and 2 are inverted Lshaped and have beveled cutting edges. A system for unloading bulk products according to claim 1 wherein each of said cutting and dragging blades 1 and 2 slides supported by a plurality of wheels and powered by 2 hydraulic cylinders. A system for unloading bulk products wherein the sequence of unloading operations comprises 3 stages where during the first stage, the gantry structure 7 moves over the wagon load 8 by the action of translation headers 9 until said gantry structure reaches the initial unloading position wherein said cutting and dragging blades 1 and 2 are back to back in an elevated position; during the second phase, said moveable frame 5 carrying said cutting and dragging blades 1 and 2 is lowered by the hydraulic cylinders 6 to a pre determined level thus cutting the load along the central length of the wagon 8 truck bed or similar ; and during the third phase, said cutting and dragging blades 1 and 2 move horizontally and transversely dragging the product until it falls over the sides of the wagon 8, truck bed or similar.|
FIELD OF THE INVENTION This invention relates generally to a system for unloading bulk products, preferably bulk products that are transported in an open train wagon, truck bed or similar vehicle of the open box type with hinged sides.
The bulk products can be grain of all types, minerals (v. g. : sand or phosphate rock), and similar products.
BACKGROUND OF THE INVENTION Nowadays the unloading of bulk products carried in an open train wagon, truck bed or similar vehicle of the open box type is basically done in one of two ways.
First, it is necessary to lower the sides of the wagon or truck bed. A small quantity of the carried bulk product falls onto the ground while, depending on the product, between 85% and 90% of the product stays condensed in a single block. This block can be unloaded manually by several workers working with hand shovels on top of the block or using mechanical shovels. If mechanical shovels are used, at least two of said shovels should be used simultaneously, one on each side of the vehicle, to increase the efficiency of the unloading operation.
The main problem with the manual unloading is the slowness of the process that limits the daily output and requires a large space and a large number of workers when there is a lot of product to be unloaded. On the other hand, the problem with the unloading of bulk products using mechanical shovels of the type that are usually used to load the trucks that carry the bulk products to the stocking place, is the heavy capital expenditure for purchase and maintenance of this kind of equipment and the parking and maneuvering space needed for the operation.
There is a third type of unloading that applies more specifically to the unloading of train wagons that is known as overturn wagon unloads where the wagon is attached to a special retention means and turned upside down thus unloading the product by gravity into a container. This kind of equipment consists of high-cost, heavy, and large rotating structures that are limited to operating on specially built wagons.
SUMMARY OF THE INVENTION The present invention was realized with the intention of solving the above mentioned problems.
A solution was searched for that would be less costly and that would occupy less space than the mechanical shovels and overturn unloads. A new concept was created to unload truck beds and open train wagons of a box type with hinged sides that are used to carry products of difficult flow
such as grains, or certain types of ores, or seeds and similar materials. A new equipment was created that is smaller, cheaper and which system is non-conventional.
Basically, this equipment comprises a portico type structure moveable on rails, a moveable frame and at least one cutting and dragging blade operated in an automatic and intermittent manner by local command or radio control.
The equipment comprises a moveable portico type structure that moves in the longitudinal sense above the load carrying a moveable frame suspended by a mechanical assembly connected to the moveable portico- type structure conferring to said moveable frame a vertical movement with at least one cutting and dragging blade attached to said moveable frame and sliding under said moveable frame in a horizontal movement transverse to the load.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will be pointed out with particularity in the appended claims. The above and further advantages of the invention may be better understood by reference to the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 1 is a front view of the wagon unload; FIG. 2 is a transversal sectional view of the wagon unload;
FIG. 3 is a longitudinal sectional view of the wagon unload.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The moveable portico-type structure 7 moves in a longitudinal direction above the wagon 8 running on rails 10 parallel to the wagon rails and above a chute to receive the product. The wagon rails and the wagon 10 containing the product stay in between the rails 10. The wagon 8 assumes a pre-determined position whereupon the moveable portico-type structure 7 moves over the wagon 8 until the moveable portico-type structure 7 reaches the initial unloading position.
The moveable frame 5 is suspended from the moveable portico-type structure 7 by an assembly of four hydraulic cylinders 6 of vertical action that confer a vertical movement to the moveable frame 5. This vertical movement of the moveable frame 5 together with the cutting and drawing blades 1 and 2 is responsible for cutting the load in the central part of the wagon, truck bed or similar.
The invention can be realized through a sole blade attached to the movable frame. The sole blade should be perpendicularly attached to the moveable frame 5. Said sole blade can be of T-shape the better to be attached to the moveable frame 5. Said sole blade will not start the unloading movement at the center of the wagon but said sole blade will start
the unloading movement at the side of the wagon with a simple dragging movement to unload the products without the need to cut said products.
However, the present invention is best realized with two cutting and dragging blades. The cutting and dragging blades 1 and 2 are of metal construction and inverted L-shape disposed back to back in the initial cutting position, this initial cutting position being similar to a T. The cutting and dragging blades 1 and 2 are supported by a plurality of wheels that slide over I-shape elements of the moveable frame 5 allowing transversal horizontal movement in relation to the wagon 8, truck bed or similar.
Said cutting and drawing blades 1 and 2 with said transversal horizontal movement through the hydraulic cylinders 4 are responsible for the lateral unloading of the products to be unloaded relative to the wagon 8, truck bed or similar.
Said cutting and drawing blades 1 and 2 additionally perform a longitudinal movement along the wagon 8 due to the programmed intermittent course of the translation heads 9 of the gantry structure 7 on rails 10, said rails being at ground level or raised, drawn by wheels powered by electrical driving means.
The sequence of operations is as follows : The portico-type structure 7 moves over the wagon 8 through the action of the translation heads 9 until it reaches the initial unloading position, said cutting and drawing blades 1 and 2 being in an elevated position and touching each other.
The moveable frame 5 carrying the cutting and dragging blades 1 and 2 is lowered powered by the hydraulic cylinders 6 reaching a pre-determined level for cutting the load in the center of the wagon 8, truck bed or similar.
Henceforth the cutting and dragging blades 1 and 2 powered by hydraulic cylinders 4 move horizontal and transversally dragging the products to fall over the sides of the wagon 8, truck bed or similar.
The gantry structure 7 advances a distance lesser than the width of the cutting and dragging blades 1 and 2 and simultaneously elevates the moveable frame 5 carrying the cutting and drawing blades 1 and 2 and returning them to the initial position. The cutting and dragging blades 1 and 2 return to the central position, laying back to back ready for a new operating cycle. These cycles are repeated until the complete unloading of the wagon.
The hydraulic cylinders 4 and 6 are powered by a hydraulic unit contained in the gantry structure 7 controlled and activated by a Programmable Logic Controller and by a remote wireless radio control.
The cutting and dragging blades 1 and 2 in T or L-shape are formed according to the lateral or central unloading method with the ability to confine the products thus avoiding the accumulation and subsequent spillover of the product over the blades and so obtain excellent efficiency. The cutting edges of the cutting and dragging blades 1 and 2 are beveled to reduce the resistance to penetration during the cutting phase of the process.