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1、BRITISH STANDARD BS EN 1374:2000 Incorporating Corrigendum No.1 Agricultural machinery Silos stationary unloaders for round silos Safety The European Standard EN 1374:2000 has the status of a British Standard ICS 65.040.20 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2
2、006, Uncontrolled Copy, (c) BSI BS EN 1374:2000 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 August 2000 BSI 16 August 2004 ISBN 0 580 36246 9 National for
3、eword This British Standard is the official English language version of EN 1374:2000, including Corrigendum July 2004. The UK participation in its preparation was entrusted to Technical Committee AGE/32, Agricultural implements and trailers, which has the responsibility to: A list of organizations r
4、epresented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence In
5、dex”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself co
6、nfer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promul
7、gate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 22, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since public
8、ation Amd. No. DateComments 15331 Corrigendum No. 1 16 August 2004 Changes to Figure B.3 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1374 June 2000 ICS 65.040.20 Incorporating corrigen
9、dum July 2004 English version Agricultural machinery - Silos stationary unloaders for round silos - Safety Matriel agricole - Dsileuses stationnaires pour silos cylindriques - Scurit Landmaschinen - Stationre Entnahmegerte fr Rundsilos - Sicherheit This European Standard was approved by CEN on 9 Apr
10、il 2000. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta
11、ined on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secr
12、etariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROP
13、EAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1374:2000 E Licensed Copy
14、: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 1374:2000 Contents Page Foreword 3 Introduction 4 1 Scope 4 2 Normative references 4 3 Terms and definitions 5 4 Mechanical safety requirements 6 4.1 General 6 4.2 Protection against hazards gener
15、ated by silage cutting tools and drive rollers 6 4.3 Manual operating device 10 4.4 Location of manual controls 10 4.5 Guarding of drives 11 4.6 Control systems 11 4.6.1 Start control 11 4.6.2 Restart 12 4.6.3 Emergency stop control 12 5 Electrical safety requirements 12 5.1 General requirements 12
16、5.2 Special requirements 12 5.2.1 Protection against electrical hazard 12 5.2.2 Enclosure protection 12 5.2.3 Electrical conductors 12 6 Information for use 12 6.1 Instruction handbook 12 6.2 Marking 13 6.3 Warnings 13 6.3.1 Warnings outside the silo 13 6.3.2 Warnings at the unloader 14 Annex A (nor
17、mative) List of hazards 15 Annex B (informative) Top-unloaders Examples for design 19 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives 22 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Unc
18、ontrolled Copy, (c) BSI Page 3 EN 1374:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 144, Tractors and machinery for agriculture and forestry, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, ei
19、ther by publication of an identical text or by endorsement, at the latest by December 2000, and conflicting national standards shall be withdrawn at the latest by December 2000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Tra
20、de Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
21、bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Annex A is normative and contains the “List of hazards”. Anne
22、x B is informative. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 1374:2000 Introduction The extent to which hazards are covered is indicated in the scope of this standard. Silo unloaders shall comply as appropriate with EN 292 f
23、or hazards which are not covered by this standard. 1 Scope This European Standard specifies safety requirements for the design and construction of unloaders mounted in stationary round silos for the removal of the silage and similar materials. It applies to electrically powered, slowly rotating unlo
24、aders which operate on top surface of the stored silage surface. It describes methods for the elimination or reduction of hazards for which specific requirements on unloaders, as defined in 3 and shown in annex B, are necessary. In addition, it specifies the type of information to be provided by the
25、 manufacturer on safe working practices. The standard only deals with the hazards generated by the silo unloader and not with those of the silo system itself (e.g. hazards arising from generated gases). The standard does not deal with technical requirements for installation or removal of the unloade
26、r from one silo to another. The list of significant hazards dealt with in this standard is given in annex A. Annex A also indicates the hazards which have not been dealt with. The environmental aspects have not been considered in this standard. This standard applies primarily to machines which are m
27、anufactured after the date of issue of this standard. NOTE Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive atmospheres can be applicable to the type of machine or equipment covered by this European Standard. The present standard is not intended
28、 to provide means of complying with the essential health and safety requirements of Directive 94/9/EC. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the t
29、ext and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to appl
30、ies. EN 292-1:1991, Safety of machinery - Basic concepts, general principles for design - Part 1: Basic terminology, methodology. EN 292-2:1991 + A1:1995, Safety of machinery - Basic concepts, general principles for design - Part 2: Technical principles and specifications. EN 294:1992, Safety of mac
31、hinery - Safety distances to prevent danger zones being reached by the upper limbs. EN 418, Safety of machinery - Emergency stop equipment, functional aspects - Principles for design. EN 954-1:1996, Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design
32、. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 1374:2000 EN 1088:1995, Safety of machinery-Interlocking devices associated with guards - Principles for design and selection. EN 60204-1:1997, Safety of machinery - Electrical equi
33、pment of machines - Part 1: General requirements (IEC 60204-1:1997). EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989). EN 60947-4-1:1992, Low-voltage switchgear and controlgear - Part 4: Contactors and motor-starters - Section 1: Electromechanical contactors and
34、 motor-starters (IEC 60947-4-1: 1990). EN 60947-5-1:1997, Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Section 1: Electromechanical control circuit devices (IEC 60947-5-1: 1997). EN 1553:1999, Agricultural machinery - Agricultural self-propelled
35、, mounted, semi-mounted and trailed machines Common safety requirements. HD 22.4 S 3:1995, Rubber insulated cables of rated voltages up to and including 450/750 V - Part 4: Cords and flexible cables (IEC 60245-4:1994). IEC 60364-7-705:1984, Electrical installations of buildings - Part 7: Requirement
36、s for special installations or locations - Section 705: Electrical installations of agricultural and horticultural premises. 3 Terms and definitions For the purposes of this standard, the terms and definitions given in EN 292-1:1991 and EN 292- 2:1991 apply together with the following. 3.1 silo unlo
37、ader machine for unloading silage from inside of a stationary silo of essentially circular cross-section. It is set upon the surface of the silage, whereby the silage cutting tools rotate around a vertical axis during extraction of the silage, e.g. by chain or screw conveyors. The cut silage is remo
38、ved from the silo by a blower. The rotational rate is max. 5/s (See annex B for examples of such machines) NOTE The cut silage is handled simultaneously out of the silo. Silo unloaders can also be used to distribute the silage during filling the silo. 3.2 cutting arm part of the unloader carrying th
39、e silage cutting tools 3.3 drive roller powered roller which drives on the silage top surface making the cutting arm rotate around the vertical axis of the silo 3.4 silage cutting tool cutting tool attached to a chain or a screw conveyor for cutting and extracting the silage 3.5 slipring connection
40、device for continuously maintaining electrical connections between the moving cutting arm and the non-rotating part of the silo unloader Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 1374:2000 4 Mechanical safety requirements 4.1
41、 General The machinery shall comply as appropriate with EN 292 for hazards which are not dealt with and especially with annex A of EN 292-2:1991/A.1:1995 when EN 292 does not give precise requirements. Unless otherwise specified in this standard, the unloader shall comply with the requirements of Ta
42、bles 1, 3, 4 and 6 of EN 294:1992. 4.2 Protection against hazards generated by silage cutting tools and drive rollers The total overall length of the silage cutting tools forming the cutting arm shall be guarded at the front, at the back and from above (see Figure 1a). The vertical distance between
43、the lower edge of the front and back guards and the lower edge of the silage cutting tools shall be a maximum of 125 mm, and the horizontal distance between the periphery of the silage cutting tools and the front and back guards shall be a minimum of 200 mm. The guard shall be radially adjustable so
44、 that a gap of no more than 60 mm is left between the end of the guard and to the surface of the inner wall of the silo (see Figure B.1). In addition, at the rear of the cutting arm a deterring/impeding device (see 3.24 in EN 292-1:1991) shall be located at a maximum height of 400 mm above the silag
45、e top surface, and a horizontal distance of not less than 300 mm from the periphery of the silage cutting tools. The guard at the rear of the unloader may be modified to include a hinged flap that rests on the cut surface of the silage (see Figure 1 b). A trip device (see 3.23.5 of EN 292-1:1991) ex
46、tending the full width of the cutting arm shall be located in front (relative to the normal direction of working) of each cutting arm and drive roller to prevent overrunning of persons. Rotation shall stop within 1/s after activation of the trip device. This device shall be mounted at a maximum heig
47、ht of 200 mm above the lower edge of the silage cutting tools and at a horizontal distance of between 300 mm and 500 mm in front of the leading edge of the silage cutting tools and drive roller. The trip device on the drive roller shall be located in accordance with Figure 2. Guards and trip devices
48、 shall withstand horizontal forces of 600 N and vertical forces of 900 N. The test method should be in accordance with annex B of EN 1553:1999. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN 1374:2000 Dimensions in millimetres Key
49、 1 Working direction 5 Back guard 2 Trip device 6 Deterring/Impeding device 3 Front guard 7 Cutting tool 4 Guard, topside 8 Silage Figure 1 a Protection of silage cutting tools with deterring device Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:44:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 8 EN 1374:2000 Dimensions in millimetres Key 1 Working direction 6 Deterring/Impeding device 2 Trip device 7 Cutting tool 3 Front guard 8 Silage 4 Guard, topside 9 Flap 5 Back guar
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