1、BRITISH STANDARD BS 4409-1: 1991 Screw conveyors Part 1: Specification for fixed troughtypeBS4409-1:1991 This British Standard, having been prepared under the directionof the Mechanical Handling Standards Policy Committee, was published underthe authority of theStandards Board and comes intoeffect o
2、n 30August1991 BSI 08-1999 First published February 1969 Second edition August 1991 The following BSI references relate to the work on this standard: Committee reference MHE/9 Draft for comment 88/74007 DC ISBN 0 580 19823 5 Committees responsible for this British Standard The preparation of this Br
3、itish Standard was entrusted by the Mechanical Handling Standards Policy Committee (MHE/-) to Technical Committee MHE/9, upon which the following bodies were represented: AFRC Institute of Engineering Research Agricultural Engineers Association Associated Offices Technical Committee Association of B
4、ritish Mining Equipment Companies Association of Consulting Engineers Automated Material Handling Systems Association British Aggregate Construction Materials Industries British Coal Corporation British Rubber Manufacturers Association British Steel Industry Coke Oven Managers Association Cranfield
5、Institute of Technology Department of Trade and Industry Mechanical Engineering and Manufacturing Technology Division (MMT) Electrical, Electronic, Telecommunications and Plumbing Union Electricity Supply Industry in United Kingdom Engineering Equipment and Materials Users Association Health and Saf
6、ety Executive Institution of Mechanical Engineers Mechanical Handling Engineers Association Solids Handling and Processing Association The following bodies were also represented in the drafting of the standard, through subcommittees and panels: National Farmers Union Royal Society for the Prevention
7、 of Accidents Amendments issued since publication Amd. No. Date CommentsBS4409-1:1991 BSI 08-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Materials 1 4 Dimensions 1 5 Shafts and drive shaft ends 3 6 Guarding 3 7 Drives 3 8 Marking 3 Appendix
8、A Information to be supplied by the purchaser 4 Figure 1 Principal dimensions of a screw conveyor (fixed trough type) 3 Table 1 Dimensions of troughs 1 Table 2 Dimensions of helical screws 2 Publication(s) referred to Inside back coverBS4409-1:1991 ii BSI 08-1999 Foreword This revision of this Part
9、of BS4409 has been prepared under the direction of theMechanical Handling Standards Policy Committee. It supersedes BS4409-1:1969 which is withdrawn. It applies to fixed trough type screw conveyors. Portable and mobile type screw conveyors are covered by BS4409-2. This Part of BS4409 has been revise
10、d to align with modern manufacturing practice and usage. Safety requirements will be the subject of a future part of thestandard. The attention of users of this British Standard is drawn to the need to comply with all the statutory instruments and regulations applicable to the equipment covered by t
11、he standard, and to its siting and use. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. S
12、ummary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside fro
13、nt cover.BS4409-1:1991 BSI 08-1999 1 1 Scope This Part of BS4409 specifies the requirements for the materials, dimensions and power provision for fixed trough type screw conveyors constructed of carbon steel and stainless steel in sizes from100mm to1250mm nominal diameter. NOTE 1Information to be su
14、pplied by the purchaser is listed in Appendix A. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard, the following definitions apply. 2.1 nominal diameter of a screw conveyor the outside diame
15、ter of the helical screw 2.2 coupling shaft a solid member which connects sections of tubular shafts 2.3 radial clearance the clearance between the helical screw and the interior of the trough 2.4 drive shaft end the end of the solid shaft to which the drive is fitted 2.5 shaft height the height of
16、the centre line of the shaft above the foot of the trough support 2.6 height above shaft the distance from the centre line of the shaft to the top of the trough 3 Materials The sheet steel components of fixed trough type screw conveyor (auger) bodies shall be constructed of carbon steel complying wi
17、th BS1449-1 or stainless steel complying with BS1449-2. Steel tubular shafts shall comply with BS6323-1 and BS6323-3 or BS6323-8. Drive shafts shall be manufactured from steel complying with BS970-1. 4 Dimensions NOTEThe dimensions specified in this standard apply to carbon steel and stainless steel
18、 components and revised dimensions may be required for other materials. 4.1 Troughs and helical screws The dimensions of troughs and helical screws shall be in accordance withTable 1 andTable 2 respectively. NOTEThe relevant dimensions are illustrated inFigure 1. 4.2 Discharge openings The width of
19、the discharge opening shall be equal to the trough width and the length of the discharge opening shall be not less than the trough width, as given inTable 1. Table 1 Dimensions of troughs (seeFigure 1) aNominal diameter of screw conveyor b D Nominal shaft height H Nominal trough width K Height above
20、 shaft (min.) A Nominal trough thickness J Heavy Medium Light mm 100 125 160 200 250 315 400 500 630 800 1000 1250 mm 112 140 160 180 225 250 315 400 450 560 630 800 mm 120 145 180 220 270 335 420 530 660 830 1040 1290 mm 63 75 90 112 140 180 224 280 355 450 560 710 mm 5.0 5.0 5.0 5.0 5.0 5.0 6.5 6.
21、5 6.5 8.0 mm 2.0 2.0 3.0 3.0 3.0 3.0 3.0 3.0 5.0 5.0 5.0 5.0 mm 1.5 1.5 1.5 2.0 2.0 a Letters refer to dimensions indicated in Figure 1. b This is the same as the nominal diameter of the helical screw (see2.1).BS 4409-1:1991 2 BSI 08-1999 Table 2 Dimensions of helical screws (seeFigure 1) aNominal d
22、iameter of helical screw Nominal outside diameter of tubular shaft Nominal outside diameter of drive shaft and coupling shaft Drive shaft end diameter (min.) Distance between bearing centres of tubular shafts b(max.) Nominal thickness of helical screw blade Segmental Continuous Heavy Medium Light He
23、avy Medium Light Root Tip Root Tip Root Tip D C B F E E E mm 100 125 160 200 250 315 400 500 630 800 1000 1250 mm 42.4 42.4 60.3 60.3 76.1 76.1 101.6 101.6 127.0 139.7 168.3 193.7 mm 30 30 35 50 50 mm 25 25 40 40 50 50 75 75 100 100 125 150 mm 2500 2500 3150 3150 3150 3150 3750 3750 5000 5000 5000 5
24、000 mm 5.0 5.0 6.5 6.5 8.0 8.0 9.5 9.5 12.0 12.0 mm 3.0 3.0 3.0 3.0 5.0 5.0 6.5 6.5 8.0 8.0 9.5 9.5 mm 2.0 2.0 2.0 2.0 3.0 3.0 5.0 5.0 mm 6.5 6.5 9.5 9.5 11.0 mm 3.25 3.25 4.75 4.75 5.50 mm 5.0 5.0 5.0 5.0 6.5 6.5 9.5 mm 2.50 2.50 2.50 2.50 3.26 3.26 4.75 mm 3.0 3.0 3.0 3.0 5.0 5.0 6.5 mm 1.50 1.50
25、1.50 1.50 2.50 2.50 3.25 a Letters refer to dimensions indicated in Figure 1. b For solid shafts, the maximum distance should not exceed50times the shaft diameter.BS4409-1:1991 BSI 08-1999 3 5 Shafts and drive shaft ends The shaft of the helical screw shall be either solid or a tubular shaft fitted
26、with coupling shafts. Drive shaft ends shall comply with BS4506. 6 Guarding The manufacturer shall provide the purchaser with a written statement detailing the extent of the guarding supplied by the manufacturer. NOTEAttention is drawn to the appropriate statutory requirements. 7 Drives 7.1 General
27、The power unit shall be continuously rated and shall withstand the working conditions arising from the siting and use of the conveyor. NOTEThe prime movers may include an electric motor, internal combustion engine, hydraulic motor or tractor power take-off. When considering prime movers, the followi
28、ng should be borne in mind. a) A prime mover of adequate power and suitable type should be used. b) Any electric motor should comply with the Institution of Electrical Engineers Regulations 1) . c) If electric motor drives are used due consideration should be given to the starting torque and to rest
29、arting under load. 7.2 V-belts Where V-belts drives are used, they shall comply with BS3733 or BS3790. 7.3 Starting and stopping Where direct on-line starters are used they shall be fixed to a permanent structure. At any point where an operator has access to the conveyor means shall be provided for
30、stopping the conveyor in an emergency. Every device controlling a prime mover(s) shall be clearly visible and clearly marked to indicate how the prime mover(s) can be stopped and restarted. NOTEThe controls should permit a safe start-up and restart procedure to be followed. 8 Marking Screw conveyors
31、 shall be permanently and legibly marked with the following information: a) the number and date of this British Standard, i.e.BS4409-1:1991 2) . b) the manufacturers name or trademark. Figure 1 Principal dimensions of a screw conveyor (fixed trough type) 1) Available from the Institution of Electric
32、al Engineers, Savoy Place, Victoria Embankment, London WC2R0BC. 2) Marking BS4409-1:1991 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the c
33、laim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS4409-1:1991 4 BSI 08-1999 Appendix A Information to be supplied by the purchaser The purchaser should suppl
34、y the following information in his enquiry or order: a) size and type of conveyor, and nominal diameter (inmm); b) required throughput of screw conveyor, (inm 3 /h), at specified working angle(s) seee) with specified material(s) seep). NOTEWhere a controlled steady output rate is required, this shou
35、ld be stated together with details of the input feed conditions; c) feed, whether flood or controlled; d) details of any special operating conditions such as damp or corrosive atmosphere, fire or explosion hazard, abnormal ambient temperatures, noise level limitations; e) whether the conveyor is to
36、operate horizontal or inclined; f) if inclined, full particulars; g) length of conveyor: centre line of inlet to centre line of outlet; h) overall length inside trough end plates; i) any restrictions on space available; j) type, number and position of inlets; k) type, number and position of outlets;
37、 l) constructional materials; m) special sealing requirements; n) weatherproofing; o) type of drive; p) material(s) to be handled: 1) description; 2) density; 3) moisture content; 4) lump sizes and percentage proportions of lump size ranges; 5) abrasive/non-abrasive/corrosive; 6) temperature; 7) oth
38、er characteristics; q) if a performance test is required; r) prime mover (seeclause7): 1) electrical equipment: i) whether or not the purchaser is to supply motor; ii) whether or not the purchaser is to supply starter; iii) power supply (voltage, a.c.or d.c.,phase frequency); 2) any special motor/st
39、arter requirements; s) stopping devices:whether or not the purchaser is to supply stopping device; t) statutory requirements:statutory provisions to which the conveyor will be subject and the extent of the guarding to be provided by the manufacturer to ensure its safe working.BS4409-1:1991 BSI 08-19
40、99 Publication(s) referred to BS970, Specification for wrought steels for mechanical and allied engineering purposes. BS970-1, General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels. BS1449, Steel plate, sheet and strip. BS1449-1,
41、 Specification for carbon and carbon-manganese plate, sheet and strip. BS1449-2, Specification for stainless and heat-resisting steel plate, sheet and strip. BS3733, Specification for endless V-belt drives for agricultural purposes. BS3790, Specification for endless wedge belt drives and endless V-b
42、elt drives. BS4409, Screw conveyors. BS4409-2, Specification for portable and mobile type (augers) 3) . BS4506, Specification for shaft ends. BS6323, Specification for seamless and welded steel tubes for automobile, mechanical and general engineering purposes. BS6323-1, General requirements. BS6323-
43、3, Specific requirements for hot finished seamless steel tubes. BS6323-8, Specific requirements for longitudinally welded stainless steel tubes. 3) Referred to in the foreword only.BS 4409-1: 1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national
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