Dsi & Limits In Capacity
Joe,
I have tremendous respect for your DSI achievements. However, stating that there is not restriction on capacity is difficult to accept, if we compare for typical available trough belts to 3 meter widths.
Then there is rock size limitations to be effective.
Combining rock size, tonnage, speedand belt width, the DSI has many restrictions on reaching the higher capacities of conventional conveyors and their limitations.
DSI equivalent trough angle for ore crossectional capacity is also a limiting parameter.
Maybe you could enlighten the observers on how these facts are not at issue. ■
Dsi Snake Sandwich High Angle Conveyor
Larry,
Thanks for your comments.
I was not aware of your post until a friend called me to let me know. I did not get the typical Email from Bulk-on-Line that lets me know of a post on a thread where I have posted. Is this still in effect?
The DSI post was actually submitted by our Amy Duncan.
In principle all statements are true as they are for conventional conveyors. Nowhere do we claim that the same volumetric rates, at the same speed, are achieved with the same belt width as a conventional conveyor system. I have elaborated on this matter in my various posts.
Due to a typically shallower troughing angle, material free edge distance and de-rating for conveying angle, the sandwich belt will be wider than that of the conventional conveyor. In a particular application, elevating coal to a silo, at the same conveying rate and belt speed, a 36" belt width, 35 degrees troughing, conventional transfer conveyor was used to load the 54" wide, vertical, sandwich belt high angle conveyor. The belt width disparity is less for lower high angles but the sandwich belt is always wider than the conventional conveyor at the same belt line, at the same belt speed.
Similarly, at a sandwich belt high angle conveyor, the material size is governed by the trough depth. The material must not be so large as to prop the belts so far apart as to lose the gentle sandwiching and edge sealing affect. This means that wide belts can handle large material size but smaller belt widths cannot. This is similar with conventional conveyors though jamming at the skirts is what typically limits the material size. For the example above, a 36" belt width conventional conveyor, in line with a 54" wide sandwich belt high angle conveyor, the lump size limitation will be similar.
In principle either conventional conveyors or sandwich belt high angle conveyors may be made as wide as required to achieve the desired volumetric rate even if the former is less wide than the latter. Practically their may be current commercial equipment availability limitations or the available space in which to acheive the required geometry constraints. To date sandwich belt high angle conveyors have been built with belts up to 120" (3048mm) wide and rates exceeding 10,000 t/h. Furthermore conveyors of 3200mm belt width have been built and there are no technological limitations to building sandwich belt high angle conveyors of this belt width or wider.
Larry, I hope this clarifies th claims in the DSI post.
Joe Dos Santos ■
Twisting Steep Conveyor Belt
Dear All
Greetings .
Hope you all doing well.
I am much proud to join this forum ,
I have a technical query , hope you all suggest me to solve this problem.
A steep angle conveyor that hast 32 m vertical height at 90 deg , and having bottom horizontal 7 m and top horizontal 5 m.
The problem is that , the belt has to twist in between height at an angle of 26 deg to have discharge at corresponding angle. the
I request all to suggest me the economic mechanisim for twisting the cleated belt .
Regards
Ashok
+91 9000 386 083 ■
DSI Snake Sandwich Belt High Angle Conveyor
WHAT IS A SANDWICH BELT CONVEYOR?
A sandwich belt conveyor uses two conveyor belts, face-to-face, to gently but firmly contain the product being carried, hence making steep incline and even vertical-lift runs easily achievable.
DSI Snake's are available in widely ranging profiles of [B]C[B] and S-shape. In any case, a long bottom belt approach is possible to the sandwich entrance, and discharge may be on the high incline or may be after the extension of the carrying belt beyond the mouth of the sandwich. Dos Santos-design sandwich belt conveyors have been proven in more than eighty successful conveyor systems installed by his previous employers throughout the world over the past eighteen years. Dos Santos' expertise will continue to advance the state of the art and assure our clients of the finest conveyor systems available today.
The DSI Snake Sandwich is the most reliable and economical solution to your steep angle and vertical high-tonnage conveying requirements.
ADVANTAGES OF DSI SNAKE
DSI Snake Sandwich conveyors offer the following advantages:
NOT A NEW TECHNOLOGY
Often times, people are under the misconception that this is a new technology. Nothing could be further from the truth. In 1979, Joseph A. Dos Santos undertook a major study to develop a means of moving and elevating large quantities of bulk materials, including coarse products such as rocks, aggregate, coal etc. at the steepest possible inclines. It was also his intent to use only existing and generally available hardware in order to achieve the most economically feasible and easily maintained steep-angle conveyor design.
Mr. Dos Santos conceived, researched and developed his sandwich belt design, with the help of a grant from the U.S. Bureau of Mines. While such concepts had been tried over the years with mixed results, Dos Santos investigated and analyzed the many forces generated in this seemingly simple concept, and created the formulas which guaranteed the successful design of such equipment. The DSI Snake Sandwich Belt High Angle Conveyor represents the ultimate achievement of is aim. It has been proven in more than 100 installations worldwide and continues to be utilized today.
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