Patent Application
20060063475
The following descriptive report for an invention application refers to the development of the turbine blast machine, more specifically referring to a blasting machine with a conventional turbine equipped with its own turbine feeding system that uses more effective conventional turbines and that have the possibility of directing the blade and with a simple system of guiding the abrasive to the center of the turbine(s), which can be done by only gravity or by the combination of gravity and an auger.
There are basically two types of machines with turbines: turbines called impact and turbines called conventional.
The machines that use the impact turbines have a simple design and the turbine's refeeding loop of the abrasive is done purely by gravity. In these machines, the turbine(s) is(are) not feed through the center, which makes the process much less efficient in terms of energy when compared with the machines that use the conventional turbines fed through the center. Other deficiencies observed in these machines are the fact that they do not have an effective abrasive purification system. In fact, they only really remove only part of the dust generated by the blasting process and it is not possible to direct the blasting blade, which will always cause it to come out in the same position due to the single direction that the turbine turns.
The machines that use the conventional turbines have much higher energy efficiency than the machines with an impact turbine because of the possibility of directing the blasting through the control box but its design is very complex. They normally have a bucket elevator or some other mechanism to lift the shot up to an abrasive filter. After it passes through the filter, the abrasive falls into a silo and from this silo is normally sent by gravity to the center of the turbine where it will be blasted against the parts to be cleaned.
A search was done on the current situation of the art available, especially as related to classes B08B9/023 and B24C3102, and patent documents were located that work with dry blasting units, which are as follows:
BR 9.903.525. This is a circular handling machine with a pressurized blasting nozzle and a closed circuit. This invention is a machine for blasting tubes with a closed circuit and is a unique concept that will solve the problem for blasting tubes and lower costs without polluting the environment. The machine belongs to the industrial production technical sector of the metal-mechanic industry. The machine is made up of two rims and each rim has two arches interconnected with bolts (8) to adjust according to the size of the tubes (24) and the rims are interconnected by frameworks welded to the arches with a table (13) upon which the nozzle (1) and the chamber (2) are fastened that provide the closed circuit. Its longitudinal movement can be done manually by means of a lever (10) or automatically by means of a pneumatic motor (30) and the circular movement can be done manually by means of the knobs (11) or automatically by means of the pneumatic cylinder (32).
BR 9.102.342. This is a machine for pre-suction blasting by which the blasting occurs by the combination of the effects of suction and pressure, ensuring a homogeneous application at an adequate pressure, which results in an operation with less or almost no level of dependency on the skill of the operator and culminating in a finished product of unequal quality. Furthermore, because of the chamber's design characteristics (1), the blasting of objects (b) of different sizes can be done from the outside, thus reducing considerably the physical space required for its installation and operation and extending its benefits even more to the operators who do not need to go inside the huge chambers as usually occurs.
BR 9.603.394. This is an improvement to a blasting machine that includes a work chamber (1) with a viewer (2), side door (3), light fixture (4), openings (5) that access the inside of the chamber, and a fan (6). The machine has two hoppers, a bottom one (7) and an intermediate one (8) that has a slit (9). It also comes with filtering panels (10) on the inside of the chamber before the fan (6). The fan (6) has a sliding shutter (61) at its output spout in order to regulate the flow. The machine has a manual stirrer (12) that dislodges the particles incorporated in the filtering panels (10) and collects the material by means of a chute (13) at the bottom that has a scrapper (14) for guiding it to a transportation tray (15). It also comes with a withdrawal hose (16) connected to a suction tube (17), which in turn is connected with the compartment of the filtering panels (10). The suction through the hose (16) is actuated by the movement of the valve (18) that fills the slit (9) of the intermediary hopper (8).
However, despite the previous existence of patented documents, these equipment operate with a pressurized or pre-suction system and do not have a turbine blasting system, which is different from the system proposed that has a system of turbines for moving the abrasive.
Therefore, due to the considerations pertinent to the current situation of the art previously mentioned, it is the objective of this descriptive report for an invention application to develop the building design applied to a blasting machine where the system developed uses conventional turbines 1 that are more effective and that have the possibility of directing the blade and with a simple system of guiding the abrasive to the center of the turbine(s), which can be done by only gravity or by the combination of gravity and an auger. This system obtains an excellent abrasive filtering quality similar to the machines designed up until now that use conventional turbines.
The abrasive blasted by the turbine(s) 1 falls on the inclines planes 2 and is guided by gravity to a filter 3 of abrasives that forms a curtain with the abrasives, making their filtering process possible because of an air current of adjustable flow that takes with it the impurities contained in them and that are then retained in the filter's dust collector. After the abrasive passes through the filter it falls on an auger or either on more inclined planes in such a way that it is guided to the center of the turbine where it will be sent once again through the turbine and blasted.
The construction form is not only more simple, but it maintains the effectiveness of the conventional turbines, has less moveable parts subjected to wear, occupies less physical space with a reasonable reduction in the area occupied, and offers a significant decrease in the equipment's height.
The auger 4 of the abrasive has a transport capacity that is apt to meet the demand required by the turbine, however, when the abrasive is no longer consumed by the turbine, it continues to turn, thus moving the abrasive without transporting it. This makes it possible to use the same gear reducer 5 for more than one function such as, for example, to drive dust collector's auger 6 and the rotational drum's auger 7.
This is possible due to the shape of the auger's screw, which is different than conventional augers built as auger 6, as compared with the auger in question 4 that has a screw shaped by a round material that is distanced from the auger's central axis so that it is only connected to it at only some points. Because of this, when a resistance is offered to the flow of the abrasive, the augers will stop transporting it, causing it to simply pass through the middle of the material deposited in the auger's bottom.
The characterization of the present document for patenting the invention hereby proposed is made up of drawings that represent the building design applied to a blasting machine in such a way that this machine can be completely reproduced by an adequate technique, allowing for full characterization of the functionality of the object submitted for approval.
The descriptive part of this report is based on these figures elaborated that express the best or preferential way of arriving at the product idealized. To help with this, a detailed and consecutive numeration is given that clarifies aspects that can be deducted by the representation adopted in order to clearly determine the protection hereby intended.
These figures are merely illustrative and may present variations but that will not differentiate from that initially presented.
Therefore:
Therefore, due to the considerations pertinent to the current situation of the art previously mentioned, it is the objective of this descriptive report for an invention application to develop the building design applied to a blasting machine where the system developed uses conventional turbines 1 that are more effective and that have the possibility of directing the blade and with a simple system of guiding the abrasive to the center of the turbine(s), which can be done by only gravity or by the combination of gravity and an auger. This system obtains an excellent abrasive filtering quality similar to the machines designed up until now that use conventional turbines.
The abrasive blasted by the turbine(s) 1 falls on the inclines planes 2 and is guided by gravity to a filter 3 of abrasives that forms a curtain with the abrasives, making their filtering process possible because of an air current of adjustable flow that takes with it the impurities contained in them and that are then retained in the filter's dust collector. After the abrasive passes through the filter it falls on an auger or either on more inclined planes in such a way that it is guided to the center of the turbine where it will be sent once again through the turbine and blasted.
The construction form is not only more simple, but it maintains the effectiveness of the conventional turbines, has less moveable parts subjected to wear, occupies less physical space with a reasonable reduction in the area occupied, and offers a significant decrease in the equipment's height.
The auger 4 of the abrasive has a transport capacity that is apt to meet the demand required by the turbine, however, when the abrasive is no longer consumed by the turbine, it continues to turn, thus moving the abrasive without transporting it. This makes it possible to use the same gear reducer 5 for more than one function such as, for example, to drive dust collector's auger 6 and the rotational drum's auger 7.
This is possible due to the shape of the auger's screw, which is different than conventional augers built as auger 6, as compared with the auger in question 4 that has a screw shaped by a round material that is distanced from the auger's central axis so that it is only connected to it at only some points. Because of this, when a resistance is offered to the flow of the abrasive, the augers will stop transporting it, causing it to simply pass through the middle of the material deposited in the auger's bottom.
The blasting machine proposed is made up of a screen drum 8 inside which the parts to be blasted are put and this drum is appropriately positioned on the blasting nozzle 9 whereby turbine 1 (there may be more than one turbine) blasts the solid particles (normally micro spheres) against the material contained in the drum while the same drum 8 turns in synchrony with that of turbine 1 and with the turn of augers 4 and 6 that are driven by the gear reducer 5 positioned next to the general motor. A further detail is that the abrasive that falls into drum 8, after it comes in contact with the part to be blasted, comes up against various inclined planes 2 to the left and to the right that guide them to an abrasive transporting auger 4, and this auger 4 continues to work despite the fact that the abrasive is no longer consumed by turbine 1, turning and moving the abrasive without transporting it, whereby the same gear reducer 5 can be used for more than one function, such as to actuate auger 6 of the dust collector and auger 7 of the rotational drum.
| Number | Date | Country | Kind |
|---|---|---|---|
| PI0404033-3 | Sep 2004 | BR | national |
