BS 4409-2-1991 Screw conveyors - Specification for portable and mobile type (augers)《螺旋输送机 第2部分 轻型和移动式(螺旋推运器)规范》.pdf
《BS 4409-2-1991 Screw conveyors - Specification for portable and mobile type (augers)《螺旋输送机 第2部分 轻型和移动式(螺旋推运器)规范》.pdf》由会员分享,可在线阅读,更多相关《BS 4409-2-1991 Screw conveyors - Specification for portable and mobile type (augers)《螺旋输送机 第2部分 轻型和移动式(螺旋推运器)规范》.pdf(10页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS 4409-2: 1991 Screw conveyors Part 2: Specification for portable and mobile type (augers)BS4409-2:1991 This British Standard, having been prepared under the directionof the Mechanical Handling Standards Policy Committee, was published under the authority of the Standards Board and
2、 comes into) effect on 30August 1991 BSI 10-1999 First published January 1970 Second edition August 1991 The following BSI references relate to the work on this standard: Committee reference MHE/9 Draft for comment 88/74008 DC ISBN 0 580 19824 3 Committees responsible for this British Standard The p
3、reparation of this British 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 Agricultural Engineers Association Associated Offices Technical Committee Asso
4、ciation of British 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 Associatio
5、n Cranfield 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 He
6、alth and Safety 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 th
7、e Prevention of Accidents Amendments issued since publication Amd. No. Date CommentsBS4409-2:1991 BSI 10-1999 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 1 6 Guarding 1 7 Drives 2 8 Stabili
8、ty of mobile screw conveyors 3 9 Suspension and positioning of screw conveyors 3 10 Marking 3 Appendix A Information to be supplied by the purchaser 4 Figure 1 Principal dimensions of a screw conveyor (portable and mobile type) 2 Table 1 Dimensions of screw conveyors (portable and mobile type) 2 Pub
9、lication(s) referred to Inside back coverBS4409-2:1991 ii BSI 10-1999 Foreword This revision of this Part of BS4409 has been prepared under the direction oftheMechanical Handling Standards Policy Committee. It supersedes BS4409-2:1970 which is withdrawn. It applies to portable and mobile type screw
10、conveyors (augers). Fixed trough type screw conveyors are covered by BS4409-1. This Part of BS4409 has been revised to align with modern manufacturing practice and usage. Safety requirements will be the subject of a future part of the standard. The attention of users of this British Standard is draw
11、n to the need to comply with all the statutory instruments and regulations appropriate to the equipment covered by the 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
12、correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 4, an inside back cover and a back cover. This standard has been updated (see co
13、pyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS4409-2:1991 BSI 10-1999 1 1 Scope This Part of BS4409 specifies the requirements for the materials, dimensions, power provision and the stability and positioning of porta
14、ble and mobile screw conveyors (augers) of the tubular type constructed of carbon steel and stainless steel in sizes from100mm to250mm nominal diameter. NOTE 1Information to be supplied by the purchaser is listed inAppendix A. NOTE 2The titles of the publications referred to in this standard are lis
15、ted 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 external diameter of the tubular body (tube) 2.2 coupling shaft a solid member which either connects portions of tubular shafts, or ter
16、minates tubular shafts at the drive and tail ends 2.3 radial clearance the clearance between the helical screw and the interior of the tube 2.4 drive shaft end the end of the solid shaft to which the drive is fitted 2.5 effective length of conveyor the distance between the end of the screw shaft at
17、the feed point and the centre of the delivery opening 2.6 overall length of conveyor the overall length of a conveyor including legs, motor, or any fittings 2.7 portable conveyor a conveyor designed to be lifted and moved as a unit manually from one position to another 2.8 mobile conveyor a conveyor
18、 mounted on wheels, crawlers or pontoons 3 Materials Sheet steel components of portable and mobile screw conveyors (augers) shall be constructed of carbon steel complying with BS1449-1 or stainless steel complying with BS1449-2. Steel tubular shafts shall comply with BS6323-1, and BS6323-3 or Part B
19、S6323-8. Drive shafts shall be manufactured from steel complying with BS970-1. 4 Dimensions NOTEThe dimensions specified in the standard apply to carbon steel and stainless steel components and revised dimensions may be required for other materials. 4.1 Tubes and helical screws The dimensions of tub
20、es and helical screws shall be in accordance withTable 1. NOTE 1The relevant dimensions are illustrated in Figure 1. NOTE 2The radial clearance should be determined by the manufacturer in accordance with the characteristics of the material to be handled and the working conditions. Unless otherwise a
21、greed between the purchaser and manufacturer the radial clearance should be not less than6mm. 4.2 Discharge openings No dimension of the discharge opening shall be less than the diameter of the tube. 5 Shafts and drive shaft ends The shaft of the helical screw shall be either solid or a tubular shaf
22、t fitted 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.BS4409-2:1991
23、 2 BSI 10-1999 Table 1 Dimensions of screw conveyors (portable and mobile type) (seeFigure 1) a 7 Drives 7.1 General The power unit shall be continuously rated and shall withstand the working conditions arising from the siting and use of the screw conveyor. NOTEThe prime movers may include an electr
24、ic motor, internal combustion engine, hydraulic motor or tractor power take-off. When considering prime movers, the following 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
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