Dos Santos International, LLC

Description

Dos Santos International was founded on its extensive worldwide experience in sales, engineering, and construction of bulk materials handling systems and equipment. This has included major contributions that have expanded the range of bulk handling and transport solutions. Most notably, advances in sandwich belt high angle conveyors have led to their worldwide utilization. The expertise of DSI spans a wide range of materials handling systems and equipment including high angle conveyors, high-powered, high-capacity, high-lift slope conveyors and long overland conveyors utilizing the very latest technology.

Sandwich Belt High Angle Conveyors

A sandwich belt conveyor uses two standard, smooth-surfaced 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.  Sandwich conveyors are available in widely ranging profiles of C- and S-Shape. 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.

Advantages

DSI Sandwich conveyors offer the following advantages:

• Unlimited conveying capacity
• A system suitable for the most rugged mine applications, yet gentle on sensitive and friable materials.
• High availability and low operating and maintenance costs.
• Smooth surfaced belts allow continuous belt cleaning by scrapers and plows. This also facilitates intermediate material discharge by belt plows, as appropriate, before and/or beyond the sandwiched part of the profile.
• All conventional conveyor hardware ensures economy and fast delivery of replacement parts.

DSI will continue to advance the state of the art, providing the company’s clients the finest conveyor systems available today.

 

Consulting and Engineering

Consulting and engineering services are offered for various industries including:

• Materials handling systems and equipment
• Power plant maintenance
• Steel mill equipment

Additionally, all industries may benefit from DSI’s discipline oriented engineering services. Such services are offered in mechanical and structural engineering. DSI’s services may be used for:

• Technical and economic studies and evaluations
• New systems
• Upgrade of existing systems
• Plant modifications and field assistance
• Conveyor system layouts

Dos Santos International consulting and engineering projects have varied widely from market study and promotional work to detailed engineering and field assistance.

 

Expanded Conveyor Technology

Dos Santos International has designed and developed conveyors for many challenging material handling applications. Each project has its own unique challenges, but with the experience of the DSI team, the company has developed in-house software utilizing analysis models that allow prediction of load equivalents and stresses of new and existing conveyor applications. Utilizing this software package allows DSI to engineer the best conveyor solution for each specific application’s needs.

Special features of the DSI “Expanded Conveyor Technology”

• Each run produces a complete tension and power analysis under steady state, starting and stopping conditions. Stopping is by braking and by drifting. Starting and stopping analyses utilize rigid body dynamics.
• Sequential runs, using macros, allow real time analysis and graphical display of changing load conditions including load-on, trailing-off and any discontinuity of material flow. This feature allows us to quickly locate the aggravations of flow discontinuities.
• Virtual material loads, or “load equivalents” are used to account for belt line resistances associated with the curving profile or plan of the conveyor line. These (previously unaccounted for) resistances become significant at horizontal curves where the effect is always increased resistance.
• In the analysis, belt tension becomes negative (compressive) when it drops below 0. This, though not realistic (as belt becomes slack), allows continued analysis indicating the tension increase required to correct the slack belt problem.
• An input section entitled “Discretion by Responsible Engineer” offers the user an opportunity to affect the analysis by use of adjustment factors on the Ky and Kx values and on the terminal resistances. These factors can be used to alter the results according to known characteristics of the conveyors being analyzed, to reflect the user’s design philosophy or to achieve matching of field monitored data.

Adder Snake – No-Transfer Solution

Sandwich belt high angle conveying is the cleanest and most efficient solution for elevating bulk material in shiploading and unloading applications.  The technology has seen successful use in some prominent projects, but there has not been wide use in the industry. The default for shiploading has been to transport material along a conventional dock conveyor, with an elevating tripper that requires excessive dock length to achieve the lift to the shiploader.  Higher lifts require considerably longer trippers, with the length at around four times the height required (for a 15 degree tripper).

By employing the sandwich conveyor technology in a shiploading application, the dock length can be reduced, as the elevating portion stays contained within the small footprint of the sandwich conveyor. However, as a sandwich conveyor must be wider than the corresponding conventional conveyor, this solution requires the entire dock belt to be excessively wide. Alternately, the conventional dock conveyor can discharge on to a separate sandwich conveyor tripper. This solution requires a transfer between the two systems.

The Adder Snake eliminates the clutter and extra equipment of a transfer by directly enveloping the dock conveyor belt into the sandwich arrangement to elevate the material vertically and completely, cleanly discharging the material onto the outgoing shiploader.  In this way, the dock conveyor can remain appropriately sized for its capacity, and is only lengthened by the short footprint of the elevating sandwich conveyor.

The solution will apply equally well to ship unloading dock conveyors, or any other conveying system that may need to achieve a large elevation over a short distance, but that also requires a long flat length for loading or travel.

The Adder Snake is not just limited to shiploading.  It can also eliminate transfers along long overland systems that require high angles only in isolated areas.  As a bonus, it can further serve the function of a booster drive at those points, reducing the overland belt tension.  Uphill and downhill paths are equally possible.

Dos Santos International continues to advance materials handling with their economical and proven solutions for the past 20 years; but the expertise of our people goes even further.  Let us develop the best solution for your next project.

THE GREATER THE LOAD – THE HIGHER THE LIFT – THE BETTER WE LOOK!

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