Patent Application
20140270998
1. Field of the Invention
The present invention relates to solid particle conveyors, such as pneumatic conveyors, and more particularly to fabric frames and mounts for use in the conveyors.
2. Description of Related Art
Pneumatic conveyor systems allow for solid materials to be transferred through a plenum from one point to another without the need for a traditional belt conveyor system. Pneumatic conveyor systems use a pressurized airflow through the material to fluidize the material and allow for gravity to move the material through the conveyor system at angles of inclination significantly less than the angle of repose for the material. Traditionally pneumatic conveyor systems use a continuous length of pneumatized fabric to support and transport the material within the conveyor.
Such conventional methods and systems have generally been considered satisfactory for their intended purpose. However, there is still a need in the art for a systems and methods that allow for easier and more efficient installation and removal of components in pneumatic conveyors. There also remains a need in the art for such systems and methods that are easy to make and use. The present invention provides a solution for these problems.
The subject invention is directed to a new and useful fixed length fabric frame for a solid particle conveyor. The fixed length fabric frame includes a perforated plate configured and adapted to support the weight of a solid particle material being transported. A fabric sheet is mounted to the perforated plate. The fabric sheet is configured and adapted to evenly distribute pressurized air within a conveyor. A backing flange is mounted to the fabric sheet. The backing flange is configured and adapted to contain the fabric sheet.
In certain embodiments, the backing flange can be defined along the perimeter of the perforated plate and fabric sheet, with the fabric sheet mounted in tension. The perforated plate, fabric sheet and backing flange all can be generally rectangular. The fabric sheet can be mounted between the perforated plate and the backing flange.
The invention also provides a solid particle conveyance system. The system includes a conveyor defining an interior space, a mounting rail within the interior space of the conveyor, and a fixed length fabric frame as described above. The fixed length fabric frame is disposed within the interior space of the conveyor proximate the mounting rail to divide the interior space into a plenum of pressurized air and a conveyance volume.
In accordance with certain embodiments, the conveyor is a single continuous conveyor, continuous from an inlet thereof to an outlet thereof. The mounting rail can include fixed mounting points mounted to corresponding points on the fixed length fabric frame. The mounting rail and the fixed length fabric frame can each have a generally rectangular perimeter. The solid particle conveyance system can include a plurality of mounting rails and corresponding fixed length fabric frames that are mounted in the conveyor end to end lengthwise. The plurality of mounting rails and fabric frames can be configured and adapted to divide the plenum of pressurized air into individually pressurized and controlled plena.
The invention also provides a method for retrofitting a solid particle conveyance system. The method includes adding a mounting rail to a single continuous conveyor defining an interior space. The conveyor is continuous from an inlet thereof to an outlet thereof, and the mounting rail is configured and adapted to mount a fabric frame within the interior space of the conveyor to divide the interior space into a plenum of pressurized air and a conveyance volume.
In certain embodiments, the method includes inserting a fixed length fabric frame, as described above, into the conveyor. Inserting the fixed length fabric frame can include mounting the fixed length fabric frame to the mounting rail. It is also contemplated that mounting the fixed length fabric frame to the mounting rail can include mounting the fixed length fabric frame to the mounting rail at the fixed mounting points described above.
These and other features of the systems and methods of the subject invention will become more readily apparent to those skilled in the art from the following detailed description of the preferred embodiments taken in conjunction with the drawings.
So that those skilled in the art to which the subject invention appertains will readily understand how to make and use the devices and methods of the subject invention without undue experimentation, preferred embodiments thereof will be described in detail herein below with reference to certain figures, wherein:
Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject invention. For purposes of explanation and illustration, and not limitation, a partial view of an exemplary embodiment of the solid particle conveyance system in accordance with the invention is shown in
Referring now to
Referring now to
With reference now to
Referring now to
The systems and method described above can facilitate installation and removal of pneumatic conveyor components compared to traditional systems which rely on single continuous lengths pneumatized fabric running the length of the plenum. In those traditional systems, the entire plenum must be disassembled to remove the fabric, and great care must be taken along its entire length to ensure proper installation. The fixed length fabric frames in accordance with this disclosure are easier to handle during installation and removal due to their limited size and the pre-stretched state of the fabric in the frame formed by the perforated plate and backing flange. Moreover, if a single one of the fixed length fabric frame becomes worn or damaged, it may not be necessary to replace all of the fabric in the conveyor since the single frame can be removed and replaced on its own. In addition to facilitating repairs and modifications, the fixed size of the fabric frames described herein can also assist in keeping a stock of spare parts and materials. All of these benefits can ultimately reduce down time when maintenance occurs. Additionally, since the mounting rails described above are mounted internally within a continuous length of conveyor, there are no joints in the conveyor shell where pressure leaks can occur.
A traditional conveyor can be retrofitted to utilize fixed length fabric frames as those described above and to form a solid particle conveyance system in accordance with the subject invention. The retrofit includes adding a mounting rail, e.g., mounting rail 106, to a single continuous conveyor defining a plenum, e.g., conveyor 102. A fixed length fabric frame, e.g., fixed length fabric frame 108, can then be inserted into the conveyor and mounted to the mounting rail at the fixed mounting points, e.g., fixed mounting points 112.
The methods and systems of the present invention, as described above and shown in the drawings, provide for solid particle conveyance with superior properties including facilitated installation and removal of components. While the apparatus and methods of the subject invention have been shown and described with reference to preferred embodiments, those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the spirit and scope of the subject invention.
