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1、BRITISH STANDARD BS 6074:1981 ISO 6485:1980 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/.879:629.11.071.55 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec
2、06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6074:1981 This British Standard, having been prepared under the direction of the Road Engineering Standards Committee, was published under the authority of the Executive Board and comes into effect on 30 January 1981 BSI 12-1999 The following
3、 BSI references relate to the work on this standard: Committee reference RDB/2 Draft for comment 79/13576 DC ISBN 0 580 11880 0 Cooperating organizations The Road Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following
4、: Asphalt and Coated Macadam Association Association of Consulting Engineers British Quarrying and Slag Federation British Tar Industry Association Cement and Concrete Association Concrete Society Limited Contractors Plant Association* Convention of Scottish Local Authorities County Surveyors Societ
5、y Department of the Environment (PSA) Department of the Environment (Transport and Road Research Laboratory) Department of Transport Federation of Civil Engineering Contractors* Federation of Manufacturers of Construction Equipment and Cranes* Greater London Council Institute of Petroleum Institute
6、of Quarrying Institution of Civil Engineers* Institution of Highway Engineers* Institution of Municipal Engineers Institution of Structural Engineers Ministry of Defence* Refined Bitumen Association Ltd. Road Emulsion Association Ltd. Road Surface Dressing Association Sand and Gravel Association Lim
7、ited Society of Chemical Industry Trades Union Congress* The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Depa
8、rtment of Industry Health and Safety Executive National Coal Board Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6074:1981 BSI 12-1999i Contents Page Cooperating organiza
9、tionsInside front cover National forewordii 1Scope and field of application1 2Reference1 3Definitions1 4Volumetric ratings1 5Expression of ratings1 Figure 1 Rubber tyred tractor-scraper2 Figure 2 Components of scraper bowls2 Figure 3 Boundaries of struck volume; plane of 1 : 1 (45)3 Figure 4 Boundar
10、ies of struck volume; plane defined by mean line3 Figure 5 Boundaries of top (heaped) volume; planes of 1 : 1 (45)3 Publication referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6074:1981 ii BSI 12-1999 National
11、 foreword This British Standard has been prepared under the direction of the Road Engineering Standards Committee and is identical with ISO 6485:1980 “Earth-moving machinery Tractor-scraper volumetric rating” published by the International Organization for Standardization (ISO). ISO 6485 was produce
12、d as a result of international discussions in which the United Kingdom took an active part. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not iden
13、tical with those used in British Standards; attention is especially drawn to the following. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. In 5.2 the comma has been used as a decimal marker. In British Standards it is curren
14、t practice to use a full point on the baseline as the decimal marker. Cross-reference. The reference to ISO 71331), for which there is no corresponding British Standard, constitutes informative matter only, and since no mandatory requirements are involved, the validity of this British Standard is no
15、t affected. 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. Summary of pages This documen
16、t comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, 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 o
17、f preparation. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6074:1981 BSI 12-19991 1 Scope and field of application This International Standard specifies a procedure for approximating the volume of typical materials contained in the bo
18、wl 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 method is intended to provide a consistent means of comparing capacities; it is not intended to define actual capacities that might be observed in any speci
19、fic application. 2 Reference ISO 7133, Earth-moving machinery Tractor-scrapers Terminology2). 3 Definitions 3.1 open bowl scraper scrapers which require the application of tractive effort to load material into the bowl. This tractive effort may be developed by the tractor-scraper itself, by another
20、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 Volumetric 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 h
21、orizontal 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 such 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 Wh
22、en the top of the apron in the closed position is below the plane of the bowl mean sides, a plane of 1 : 1 (45) slope, up and rearward, from the top edge of the apron to the plane of the bowl mean sides is added. See Figure 3. 4.2.3 If in the position of 4.1.3, the apron does not contact the cutting
23、 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 outermost 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 th
24、e 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 under 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
25、struck volume. See Figure 5. 4.3.2 Planes of 1 : 1 (45) slope, up and in, from the upper edges of the struck volume and surfaces of 4.3.1. See Figure 5. It does 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
26、.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 ignored. 5 Expression of ratings 5.1 Any published ratings must be within 3 % of the volume determined by this procedure. 5.2 Ratings for volum
27、es less than 10 m3 should be expressed to the nearest 0,1 m3 while those larger should be expressed to the nearest 0,5 m3. 2) At present at the stage of draft. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6074:1981 2 BSI 12-1999 Figure
28、 1 Rubber tyred tractor-scraper Figure 2 Components of scraper bowls Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6074:1981 BSI 12-19993 Figure 3 Boundaries of struck volume; plane of 1 : 1 (45) Figure 4 Boundaries of struck volume; pl
29、ane defined by mean line Figure 5 Boundaries of top (heaped) volume; planes of 1 : 1 (45) Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Co
30、py, (c) BSI BS 6074:1981 BSI 12-1999 Publication referred to See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 12:30:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6074:1981 ISO 6485:1980 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is
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