This part of JB/T 7688 specifies the general technical requirements, test methods, inspection rules, etc. of metallurgy crane (hereinafter referred to as "crane").
This part is mainly applicable to dedicated cranes for metal smelting, rolling and hot processing, etc. enterprises, including casting crane, scrap charging crane, slab handling crane, claw crane, forge crane and quenching crane. Other similar metallurgy cranes may refer to this part for use.
2 Normative References
The following standards contain provisions which, through reference in this part of JB/T 7688, constitute provisions of this part. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this part are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this part.
GB/T 146.1 "Rolling Stock Gauge for Standard Gauge Railways"
GB/T 699 "Quality Carbon Structural Steels"
GB/T 700 "Carbon Structural Steels" (GB/T 700-2006, ISO 630:1995, NEQ)
GB 755 "Rotating Electrical Machines-Rating and Performance" (GB 755-2000, idt IEC 60034-1:1996)
GB/T 985 "Basic Forms and Sizes of Weld Grooves for Gas Welding Manual Arc Welding and Gas-shielded Arc Welding"
GB/T 986 "Basic Forms and Sizes of Submerged Arc Weld Grooves"
GB/T 1228 "High Strength Bolts with Large Hexagon Head for Steel Structures" (GB/T 1228-2006, ISO 7412:1984, NEQ)
GB/T 1229 "High Strength Large Hexagon Nuts for Steel Structures" (GB/T 1229-2006, ISO 4775:1984, NEQ)
GB/T 1230 "High Strength Plain Washers for Steel Structures" (GB/T 1230-2006, 180 7416:1984, NEQ)
GB/T 1231 "Specifications of High Strength Bolts with Large Hexagon Head, Large Hexagon Nuts, Plain Washers for Steel Structures"
GB/T 1239.2 "Cold Coiled Helical Complessions Springs-Technical Specifications" (GB/T 1239.2-1989, neq JIS B2707:1987)
GB/T 1239.4 "Hot Coiled Helical Springs-Technical Specifications"(GB/T 1239.4-1989, neq JIS B2702:1987)
GB/T 3323 "Radiographic Examination of Fusion Welded Joints in Metallic Materials" (GB/T 3323-2005, EN 1435:1997, MOD)
GB 3632 "Sets of Torshear Type High Strength Bolt Hexagon Nut and Plain Washer for Steel Structures"
GB/T 3811 "Design Rules for Cranes"
GB 4208 "Degrees of Protection Provided by Enclosure (IP Code)" (GB/T 4208-2008, IEC 60529:2001, IDT)
GB/T 5905 "Cranes-Test Code and Procedures" (GB/T 5905-1986, idt ISO 4310:1981)
GB/T 5972 "Wire Rope for Lifting Appliances-Code of Practice for Examination and Discard" (GB/T 5972-2006, ISO 4309:1999, IDT)
GB/T 5973 "Cuneiform Connector for Use with Steel Wire Ropes"
GB/T 5974.1 "General Purpose Thimbles for Use with Steel Wire Ropes"
GB/T 5974.2 "Heavy Thimbles for Use with Steel Wire Ropes"
GB/T 5975 "Clamping Plates for Fixing Steel Wire Ropes"
GB/T 5976 "Wire Rope Grips"
GB 6067 "Safety Rules for Lifting Appliances"
GB 8918 "Steel Wire Ropes for Important Purposes" (GB 8918-2006, ISO 3154: 1988, MOD)
GB/T 8923 "Rust Grades and Preparation Grades of Steel Surfaces before Application of Paints and Related Products" (GB/T 8923-1988, eqv ISO 8501:1988)
GB/T 9286 "Paints and Varnishes-Cross Cut Test for Films" (GB/T 9286-1998, eqv ISO 2409:1992)
GB/T 10051 (All Parts) "Lifting Hooks"
GB/T 10183-2005 "Cranes-Overhead Travelling Cranes and Portal Bridge Cranes-Tolerances for Cranes Manufacture and Tracks Laying" (ISO 8306:1985, MOD)
GB/T 11352 "Cast Carbon Steels for General Engineering Purposes" (GB/T 11352-1989, neq ISO 3755:1975)
GB/T 13306 "Plates"
GB/T 13384 "General Specifications for Packing of Mechanical and Electrical Products"
GB/T 14405-1993 "General Purpose Overhead Cranes"
GB 15052-1994 "Lifting Appliances-Dangerous Positions and Signs"
GB/T 19418 "Arc-welded Joints in Steel-Guidance on Quality Levels for Imperfections" (GB/T 19418-2003, ISO 5817:1992, IDT)
GB/T 20303.5 "Cranes-Cabins-Part 5: Overhead Travelling and Portal Bridge Cranes" (GB/T 20303.5-2006, ISO 8566-5:1992, IDT)
JB/T 3241 "SWP Universal Coupling with Spider and Split Bearing Eye"
JB/T 4315 "Cranes-Electric Control Equipment"
JB/T 5513 "SWC Type Whole Fork Cross Spindle Universal Coupling"
JB/T 6392 "Rail Wheels for Crane"
JB/T 6406 "Electro-hydraulic Drum Brakes"
JB/T 7009 "Spherical Roller Coupling for Drum"
JB/T 7017 "Hydraulic Buffer for Cranes"
JB/T 7019 "Disk Brake-Brake Disc"
JB/T 7020 "Electro-hydraulic Disc Brakes"
JB/T 7687.1-JB/T 7687.4 "Lifting Hook Accessories"
JB/T 7944 "Sampling Procedures for Inspection by Attributes of Coied Helical Springs"
JB/T 8110.1 "Spring Buffer for Crane"
JB/T 8854.1 "Curved-tooth Coupling GCLD"
JB/T 8854.2 "Curved-tooth Coupling GIICL and GIICLZ"
JB/T 8854.2 "Curved-tooth Coupling GIICLZ, GICL and GICLZ"
JB/T 8905.1 "Three-point Support Gearboxes for Cranes"
JB/T 8905.2 "Foot Mounted Gearboxes for Cranes"
JB/T 9005 "Casting Sheaves for Cranes"
JB/T 9006 "Casting Drums for Cranes"
JB/T 10104 "Technical Specifications for YZ Range of Three-phase Induction Motors for Crane and Metallurgical Application
JB/T 10105 "Technical Specifications for YZR Range of Three-phase Asynchronous Motors for Crane and Metallurgical Application"
JB/T 10559 "Non-destructive Testing of Lifting Appliances-Ultrasonic Testing of Steel Welds"
JB/T 10833 "The Polyurethane Buffer for Cranes"
3 Technical Requirements
3.1 Environmental Conditions
3.1.1 the power supply of the crane is generally three-phase AC, the frequency is 50Hz (60Hz) and the voltage is 380V. For large-scale metallurgy crane, if the driving motor capacity of single mechanism exceeds 400kW or the total capacity of the motor during use exceeds 500kW, three-phase AC, 50Hz and 3000V power supply may be recommended. Under normal operation condition, the voltage fluctuation of power supply system at crane feeder line access shall not exceed ±10% of rated value.
If there is specific requirement for power supply, it may be determined by negotiation of the supplier and the demander according to the user need.
3.1.2 Where the altitude of crane erection and use place exceeds 1000m, the motor capacity shall be checked in accordance with those specified in GB 755.
3.1.3 The operating environment temperature and humidity of crane shall meet the following requirements:
a) Operating environment temperature of crane shall generally be -10℃~+50℃;
b) Relative humidity, under +40℃ temperature, shall not exceed 50%.
Note: If above-mentioned requirements are exceeded, it shall be settled by negotiation of the supplier and the demander according to the user need.
3.1.4 Site using the crane shall be free from any flammable, explosive and corrosive gases.
3.1.5 The installation of crane rail shall be in accordance with those specified in GB/T 10183.
JB/T 7688.1-2008 The following standards are cited：
