This document specifies the types, basic parameters and technical requirements of electric single girder cranes, describes the corresponding test methods, and stipulates the inspection rules as well as marking, packaging, transportation and storage.
This document is applicable to the manufacture of general-purpose electric single girder cranes with electric hoists as the hoisting mechanism that operate in general environment.
This document is not applicable to electric single girder cranes operating in environment with explosive, nuclear radiation or corrosive gas.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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 for films
GB/T 10183.1 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 14405-2011 Bridge crane for general purpose
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 Polyurethane buffer for cranes
JB/T 12987 Cranes - Spring buffer
JB/T 12988 Cranes - Rubber buffer
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 Electric single girder cranes (hereinafter referred to as "cranes") are classified by the position and travelling mode of hoisting mechanism as follows:
a) standard headroom electric hoist crane with trolley, with the typical schematic diagram shown in Figure 1;
b) low headroom electric hoist crane with trolley, with the typical schematic diagram shown in Figure 2;
c) crane with an electric hoist installed on cantilevered trolley, with the typical schematic diagram shown in Figure 3.
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, transportation and storage Bibliography Figure 1 Typical schematic diagram of standard headroom electric hoist crane with trolley Figure 2 Typical schematic diagram of low headroom electric hoist crane with trolley Figure 3 Typical schematic diagram of crane with an electric hoist installed on cantilevered trolley Figure 4 Schematic diagram of bridge girder camber Figure 5 Schematic diagram of horizontal bending of bridge girder Figure 6 Schematic diagram of vertical deflection of wheel Figure 7 Schematic diagram of horizontal deflection of wheel axis Figure 8 Schematic diagram of height difference of wheel force application points Figure 9 Schematic diagram of measurement method for local warping of bridge girder web Figure 10 Schematic diagram of measurement method for height difference of crane wheel force application point Figure 11 Schematic diagram of step a) of measurement method for vertical and horizontal deviations of crane wheels Figure 12 Schematic diagram of step c) of measurement method for vertical and horizontal deviations of crane wheels Figure 13 Schematic diagram of vertical and horizontal deviation states of wheels 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 Load-lifting speed of cranes Table 6 Travelling speed of crane and trolley Table 7 Safety dimensions of cranes Table 8 Height difference of wheel force application points Table 9 Noise corrected value Table 10 Measurement of crane span Table 11 Corrected value of steel wire sag amount Table 12 Inspection items
