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)
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.
Contents Foreword I 1 Scope 2 Normative References 3 Technical Requirements 3.1 Environmental Conditions 3.2 Use Performance 3.3 Important Metal Structural Parts 3.4 Welding 3.5 High-strength Bolt Connection 3.6 Main Parts 3.7 Assembly 3.8 Electric equipment 3.9 Safety and Health 3.10 Painting 3.11 Lubrication 4 Test Methods 4.1 Visual Inspection 4.2 Static Load Test 4.3 Static Rigidity Test 4.4 Rated Load Test 4.5 Dynamic Load Test 4.6 Lifting Mechanism Electric Brake Deceleration Test 4.7 Noise Test 4.8 Vertical, Horizontal and Deviation Inspection of Crane Wheels 5 Inspection Rules 5.1 Inspection Classification 5.2 Ex-factory Inspection 5.3 Type Test 6 Marking, Packing, Handling Storage 6.1 Marking 6.2 Packaging, Handling and Storage Appendix A (Normative) Inspection Methods for Lifting Mechanism Braking Distance Appendix B (Normative) Inspection Methods for Axis Horizon and Vertical Deviation of Crane Wheels B.1 Axis Horizon Deviation of Crane Wheel at Left (Right)
