Screw_Conveyor_Catalogue

CONTINENTAL CONVEYOR 470 St-Alphonse Street East Thetford Mines, Quebec Canada G6G 3V8 Tel (418) 338-4682 Fax: (418) 338-4751 www.continentalconveyor,ca & MACHINE WORKS CONTINENTAL CONVEYOR (ONTARIO) LTD 100 Richmond Blvd Napanee, Ontario Canada K7R 383 Tel (613) 354-3318 Fax: (613) 354-5789 www.continentalconveyor.ca COPYRIGHT CONTINENTAL CONVEYOR 1986 LTD Introduction Foreword Design Data Selection Procedure Bearing Recommendations 24 Special Applications 26 Component Material and Specifications Selection and Layout Data Input and Discharge 27 29 Screw Feeders 31 Inclined Screw Conveyors 35 Vertical Screw Conveyors 36 Drive Assemblies 37 and Arrangement Special Fabrication Materials 38 Conveyor Screws 40 Shafts 48 Hangers 53 Trough Ends 57 End Bearings 63 Seals 69 Troughs 72 Discharges and Slide Gates 78 Trough Covers 82 Trough Cover Fasteners 84 Installation 86 Assembly and Maintenance Bolts 87 Flange Bolt Patterns 88 Weights and Dimensions 90 Engineering Information 92 Component Code Index 95 Index 96 It is with great pleasure that Continental presents this Screw Conveyor Catalogue and Engineering Manual which covers our complete line of screw conveyors and accessories The information compiled in this manual is the result of many years' experience in the design and manufacture of bulk material handling equipment and is thereby your assurance of the best in both equipment and recommendations With the help of this manual, the screw conveyor user is given sufficient design information with which to effectuate a sound selection of both single components and complete screw conveyors alike All Continental screw conveyors and components are designed and built in accordance with the standards established by the industry and are therefore completely interchangeable with equipment of other recognized manufacturers Continental's production facilities have also kept pace with inherent advancements in design Numerous specialty machines have been designed and methods have been devised that help assure and control manufacturing tolerances, thus providing for interchangeability of parts, greater ease of assembly, smoother operation and longer life We sincerely hope that you will find this manual complete in detail, easy to use and extremely helpful in fulfilling your screw conveyor requirements [~~;I~~~~i n an ta 1.1 FOREWORD The basic principle of the screw conveyor remains unchanged today from when Archimedes first used an internal type helix to remove water from the hold of a ship With the technological innovations of the past cen.tury and a great deal of research in the field, screw (::onveyors have become precision pieces of equipment that can move materials either horizontally, on an incline or vertically They can be used as feeders, distributors, collectors or mixers and can be equipped to either heat or cool while performing the task With proper covers and gasketing they become weatherproof, dust tight and rodent proof Their compact design allows them to fit easily into restricted areas that would otherwise be unsuitable for most types of bulk material handling equipment They are simple to install and support and require very little maintenance Per foot, they are undoubtedly one of the most economical types of bulk material handling equipment available today 1Ci:1continantalj DESIGN DATA Engineering and Layout The following section contains all relevant information and basic engineering data that is required for specifying and designing the important features of most screw conveyor installations and applications There will, however, be instances when the information herein will be insufficient with which to effectuate proper design due to uncommon variables that may be present Continental staff and engineers have considerable knowledge in the design of screw conveyors for special applications and will gladly assist you with sound suggestions and recommendations for your particular problem Conveyor The factors, By Capacity capacity changing amount one will one when will the fuller a material is, the non loadings lower loadings screw conveyors manual can less the trough free of 45% of either are bring while 30% used of about and to more more can abrasive or 15% as feeders the hour one as a or by however that undesireable effects as an that turns excessively wear be taken a material more and is dealt and it to work can be sluggish Exceptions as a general tends abrasive to allow materials This per small the diameter to remember flowing be filled flowing material it should free speed varies A small the one rapid loading, be Conversely, abrasive, speed inefficient and may handle It is important trough abrasive trough Therefore, trough the this will principle and ultimately amountof the become upon less same three loading one conveyor loading upon trough variables the components deciding the the handle can the these increasing to extremes, subject that of hour trough conveyor When guide per is dependant diameter, all either the taken overfull fast or therefore by augmenting coveyor conveyor of material conveyor large of a screw namely with rule be, efficiently conveyed with materials to this to sluggish require occur further when on in the Material Analysis The initial step in engineering a screw conveyor is to analyse the material being handled and ascertain its physical properties in order that they may be thoroughly evaluated and understood prior to proceeding with the conveyor sizing and selection These properties are discussed in further depth below Lump Size: The minimum diameter of a conveyor screw for a given application is determined by the maximum lump size of the material being handled For this reason, it is necessary to thoroughly analyse the material and determine its maximum lump size and the percentage of lumps to total volume along with the minimum particle size and screen analysis when possible With this information, proper conveyor sizing can be effectuated Flowability: The flowability of a material greatly affects the horsepower requirement of the conveyor in question Flowability is related to the angle of repose of a material and therefore, fine free flowing materials can be handled at higher trough loadings with lower horsepower requirements than coarse, sluggish ones Please refer to the Classification Code, Table for further information Abrasiveness: The more abrasive the material being handled, the greater the wear the conveyor components are subjected to For this reason, it is necessary to determine the abrasive quality of the material in question prior to sizing the conveyor Abrasiveness can be determined by knowing a material's hardness on a Moh's scale and should this not be available the material can be compared with another known abrasive material Special Applications: These are additional the operation of the conveyor and are further entitled Special Applications and Specifications and 27 inclusive factors which can affect discussed in the section appearing on pages 26 ' Moisture Content: Material moisture content is also a factor that affects material flow Excessively dry or wet products tend to flow easily, however, many develop sluggish characteristics when having a moisture content between the two extremes This is not accounted for in the material tables which follow and such materials should therefore be reclassified Duty Cycle: Machinery design also includes selection of the proper equipment for the usage it will receive A conveyor operating for hours per day does not require the same heavy construction as one designed for 24 hour usage This appliesto material thickness and drive sizes alike Likewise shock loads to which the equipment and drive are subjected to are an important consideration Treatment of these factors are not described in suitable enough depth here however, as previously mentioned our engineering staff will gladly assist you to determine the best conveyor design SELECTION PROCEDURE Establish The initial physical and Screw the distance per material the the minimum vary capacity density of in pounds per the in pounds This per of cubic per being it will per be the or pounds divide In some cases Thus, when handled and hour is to be must becomes hour give one foot per that hour hour cubic per feet capacity of tons conveyor, material feet product the it is to be conveyed in terms feet is to analyze at which maximum to cubic the capacity of the in cubic for rate in terms stated density may it is to of the this conveyor the is defined is often maximum conveyor which in terms by the density material, over to change hour a screw the capacity capacity In order establish of be determined calculating the the This hour pounds in engineering conveyor must handled per step characteristics handled This Known Factors necessary divide required this to by the capacity of hour Classify Your Material Materials appearing is compiled material materials are in Table When is not that Classification TABLE classified as It is from classifying listed, MATERIAL can in Table ABRASIVENESS Material Material first classified Table by or by Classification Characteristics, look it up in Table comparing referring it with to CLASSIFICATION Containing Stringy, Lumps over 1/2" Interlocking, Mats Together Non-abrasive Abrasive F G in Storage Flammability Becomes plastic or tends to soften Very dusty Aerates and develops fluid characteristics Contains explosive dust Stickiness -Adhesion Contaminable, affecting use or saleability Degradable, affecting use or saleability Gives off harmful fumes or dust Highly corrosive Mildly corrosive Hygroscopic Interlocks or mats together Oils or chemical present -which affect rubber products Packs under pressure Very light and fluffy -may be wind swept Elevated Temperature B C D E Very free Flowing Free Flowing Average Flowability Sluggish Builds Up and Hardens Generates Static Electricity Decomposes -Deteriorates apply) similar Material A Very Abrasive MISCELLANEOUS CHARACTERISTICS (sometimes more than one may the If your CODE Very fine 100 mesh and under Fine -1/8" mesh and under Granular, -1/2" and under Lumpy, Code Table Irregular, FLOWABILITY the that a material, appear Code, SIZE it per this H J K L M N p Q R S T U V W X y Z