1、BRITISH STANDARD BS6074:1981 ISO6485:1980 Method for Determination of the volumetric rating of tractor-scrapers for earth-moving machinery ISO title: Earth-moving machinery Tractor-scraper volumetric rating UDC 624.132:621.878/.879:629.11.071.55BS6074:1981 This BritishStandard, having been prepared
2、under the directionof the Road EngineeringStandards Committee, was published underthe authority of the Executive Board and comesintoeffect on 30January1981 BSI12-1999 The following BSI references relate to the work on this standard: Committee referenceRDB/2 Draft for comment79/13576DC ISBN 0 580 118
3、80 0 Cooperating organizations The Road Engineering Standards Committee, under whose direction this BritishStandard was prepared, consists of representatives from the following: Asphalt and Coated Macadam Association Association of Consulting Engineers British Quarrying and Slag Federation British T
4、ar Industry Association Cement and Concrete Association Concrete Society Limited Contractors Plant Association* Convention of Scottish Local Authorities County Surveyors Society Department of the Environment (PSA) Department of the Environment (Transport and Road Research Laboratory) Department of T
5、ransport Federation of Civil Engineering Contractors* Federation of Manufacturers of Construction Equipment and Cranes* Greater London Council Institute of Petroleum Institute of Quarrying Institution of Civil Engineers* Institution of Highway Engineers* Institution of Municipal Engineers Institutio
6、n of Structural Engineers Ministry of Defence* Refined Bitumen Association Ltd. Road Emulsion Association Ltd. Road Surface Dressing Association Sand and Gravel Association Limited Society of Chemical Industry Trades Union Congress* The organizations marked with an asterisk in the above list, togeth
7、er with the following, were directly represented on the Technical Committee entrusted with the preparation of this BritishStandard: Associated Offices Technical Committee Department of Industry Health and Safety Executive National Coal Board Amendments issued since publication Amd. No. Date of issue
8、 CommentsBS6074:1981 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii 1 Scope and field of application 1 2 Reference 1 3 Definitions 1 4 Volumetric ratings 1 5 Expression of ratings 1 Figure 1 Rubber tyred tractor-scraper 2 Figure 2 Components of scraper
9、bowls 2 Figure 3 Boundaries of struck volume; plane of1:1(45 ) 3 Figure 4 Boundaries of struck volume; plane defined by mean line 3 Figure 5 Boundaries of top (heaped) volume; planes of1:1(45 ) 3 Publication referred to Inside back coverBS6074:1981 ii BSI 12-1999 National foreword This BritishStanda
10、rd has been prepared under the direction of the Road Engineering Standards Committee and is identical with ISO6485:1980 “Earth-moving machinery Tractor-scraper volumetric rating” published by the International Organization for Standardization (ISO). ISO6485 was produced as a result of international
11、discussions in which the UnitedKingdom took an active part. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a BritishStandard without deviation. Some terminology and certain conventions are not identical with those used in BritishS
12、tandards; attention is especially drawn to the following. Wherever the words “International Standard” appear, referring to this standard, they should be read as “BritishStandard”. In5.2 the comma has been used as a decimal marker. In British Standards it is current practice to use a full point on th
13、e baseline as the decimal marker. Cross-reference. The reference to ISO7133 1) , for which there is no corresponding BritishStandard, constitutes informative matter only, and since no mandatory requirements are involved, the validity of this BritishStandard is not affected. A British Standard does n
14、ot 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. Summary of pages This document comprises a front cover, an inside
15、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 front cover. 1) In course of preparation.BS6074:1981 BSI 12-1999 1 1
16、 Scope and field of application This International Standard specifies a procedure for approximating the volume of typical materials contained in the bowl of open bowl scrapers. The volumes are based on the inside dimensions of the bowl and representative volumes on top of the bowl. This rating metho
17、d is intended to provide a consistent means of comparing capacities; it is not intended to define actual capacities that might be observed in any specific application. 2 Reference ISO7133, Earth-moving machinery Tractor-scrapers Terminology 2) . 3 Definitions 3.1 open bowl scraper scrapers which req
18、uire the application of tractive effort to load material into the bowl. This tractive effort may be developed by the tractor-scraper itself, by another tractor-scraper temporarily or permanently connected, or by a pushing tractor 3.2 components of open bowl scrapers see Figure 1 and Figure 2 4 Volum
19、etric ratings 4.1 Positioning of the bowl 4.1.1 The bowl shall be positioned so that the lowest flat surface of the floor is horizontal or as close to horizontal as possible. 4.1.2 The ejector shall be fully retracted. 4.1.3 The apron shall be fully closed. Any adjustment of apron closure shall be s
20、uch as to minimize any opening between the apron and cutting edge. 4.2 Boundaries of the struck volume 4.2.1 The interior surface of the apron. 4.2.2 When the top of the apron in the closed position is below the plane of the bowl mean sides, a plane of1:1(45 ) slope, up and rearward, from the top ed
21、ge of the apron to the plane of the bowl mean sides is added. See Figure 3. 4.2.3 If in the position of4.1.3, the apron does not contact the cutting edge, the opening shall be closed by the plane defined by the line of intersection of the cutting edge and the bowl floor and the line defined by the o
22、utermost points of the apron lip. 4.2.4 The interior surfaces of the cutting edge, bowl floor, ejector and bowl sides. 4.2.5 The plane defined by the mean lines. Mean lines are horizontal lines above which, in a side view of the bowl, there is an area of bowl side equal to the non-bowl side area und
23、er the lines. See Figure 4. 4.3 Boundaries of the top (heaped) volume 4.3.1 Any load-carrying extension of the ejector above the upper plane of the struck volume. SeeFigure 5. 4.3.2 Planes of1:1(45 ) slope, up and in, from the upper edges of the struck volume and surfaces of4.3.1. See Figure 5. It d
24、oes not mean that the material will form this angle but this angle of repose generally expresses best the angle of repose of the usual soils. 4.4 Rated volume is the sum of the struck and top (heaped) volumes. 4.5 The effect of local discontinuities gussets, apron arms, etc. on the volumes shall be
25、ignored. 5 Expression of ratings 5.1 Any published ratings must be within3% of the volume determined by this procedure. 5.2 Ratings for volumes less than10m 3should be expressed to the nearest0,1m 3while those larger should be expressed to the nearest0,5m 3 . 2) At present at the stage of draft.BS60
26、74:1981 2 BSI 12-1999 Figure 1 Rubber tyred tractor-scraper Figure 2 Components of scraper bowlsBS6074:1981 BSI 12-1999 3 Figure 3 Boundaries of struck volume; plane of1:1(45 ) Figure 4 Boundaries of struck volume; plane defined by mean line Figure 5 Boundaries of top (heaped) volume; planes of1:1(4
27、5 )4 blankBS6074:1981 BSI 12-1999 Publication referred to See national foreword.BS6074:1981 ISO6485:1980 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Eu
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