JB/T 2603-2024 Electric under slung cranes
1 Scope
This document specifies the types, basic parameters and technical requirements of electric under slung cranes, describes the corresponding test methods, and stipulates the inspection rules as well as marking, packaging, transport and storage.
This document is applicable to the manufacture of general-purpose electric under slung cranes with electric hoists as the hoisting mechanism that operate in general environments.
This document is not applicable to electric under slung cranes operating in environments with explosive, nuclear radiation or corrosive gas.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 755-2019 Rotating electrical machines - Rating and performance
GB/T 3811 Design rules for cranes
GB/T 5905 Cranes - Test code and procedures
GB/T 6067.1 Safety rules for lifting appliances - Part 1: General
GB/T 6067.5 Safety rules for lifting appliances - Part 5: Bridge and gantry cranes
GB/T 6974.1 Cranes - Vocabulary - Part 1: General
GB/T 6974.5 Cranes - Vocabulary - Part 5: Bridge and gantry cranes
GB/T 8923.1-2011 Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings
GB/T 9286 Paints and varnishes - Cross-cut test
GB/T 10183.1-2018 Cranes - Tolerances for wheels and travel and traversing tracks - Part 1: General
GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 14048.1-2012 Low-voltage switchgear and controlgear - Part 1: General rules
GB/T 37910.1 Non-destructive testing of welds - Acceptance levels for radiographic testing - Part 1: Steel, nickel, titanium and their alloys
JB/T 4315 Electrical control equipment of lifting appliance
JB/T 5317 Electric chain hoists
JB/T 6391.1 Conductor systems - Part 1: Insulated conductor systems
JB/T 8437 Wireless remote controls for lifting appliances
JB/T 9008.1 Electric wire rope hoists - Part 1: Types and basic parameter, specification
JB/T 10559 Non-destructive testing of lifting appliances - Ultrasonic testing of steel welds
JB/T 10833 The polyurethane buffer for cranes
JB/T 12987 Spring buffer for crane
JB/T 12988 Rubber buffer for crane
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 6974.1 and GB/T 6974.5 apply.
4 Types and basic parameters
4.1 Types
4.1.1 General
Electric under slung cranes (hereinafter referred to as "cranes") can be classified into three types based on the differences in the structure type of the bridge and the number of suspension support points: electric single-girder under slung cranes, electric double-girder under slung cranes and multi-support point under slung cranes.
4.1.2 Electric single-girder under slung cranes
See Figure 1 for the typical schematic diagram of cranes with a single main girder and two support points.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Types and basic parameters
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transport and storage
Bibliography
Figure 1 Typical schematic diagram of electric single-girder under slung cranes
Figure 2 Typical schematic diagram of electric double-girder under slung cranes
Figure 3 Typical schematic diagram of multi-support point electric single-girder under slung cranes
Figure 4 Typical schematic diagram of multi-support point electric double-girder under slung cranes
Figure 5 Schematic diagram of camber of main girder before static test
Figure 6 Schematic diagram of bridge diagonal deviation
Figure 7 Schematic diagram of gauge deviation of double-girder underslung running trolley
Figure 8 Schematic diagram of height difference of rail of double-girder underslung running trolley
Figure 9 Schematic diagram of clearance on both sides of rail flange when there are flanges
Figure 10 Schematic diagram of clearance between horizontal guide wheels and rail flange if horizontal guide wheels are used when there are no flanges
Figure 11 Schematic diagram of measurement method for local warping of main girder web
Table 1 Working levels of cranes
Table 2 Rated capacity of cranes
Table 3 Span of cranes
Table 4 Load-lifting height of cranes
Table 5 Lifting speed of cranes
Table 6 Travelling speed of cranes
Table 7 Height difference of rail of double-girder underslung running trolley
Table 8 Ultimate deviation of crane span
Table 9 Suspended clearance between passive wheel and force application point of running rail
Table 10 Noise corrected value
Table 11 Measurement of crane span
Table 12 Corrected value of steel wire sag amount
Table 13 Inspection items
