This standard specifies the basic types and parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of hydropower station gantry cranes. This standard applies to single-point hydropower station gantry cranes with rated lifting capacity of 50/5~1000/100t and double-point hydropower station gantry cranes with rated lifting capacity of 2×25/5~2×500/100t, and other hydropower station gantry cranes can also be used as a reference. JB/T 6128-1992 Hydropower Station Gantry Crane JB/T6128-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Hydropower Station Gantry Crane
1 Subject Content and Scope of Application
JB 6128-92
This standard specifies the basic types and parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of hydropower station gantry cranes.
This standard applies to single-lifting-point hydropower station gantry cranes with a rated lifting capacity of 50/5~1000/100t and double-lifting-point hydropower station gantry cranes with a rated lifting capacity of 2×25/5~2×500/1001, whose lifting devices are lifting forks, hooks, hanging beams, cleaning devices and their dual or multiple uses. Other hydropower station gantry cranes (hereinafter referred to as cranes) may also refer to this standard. 2 Reference standards
Standard gauge railway locomotive and rolling stock limits
GB 985
GB 986
Packaging, storage and transportation graphic symbols
Technical conditions for high-quality carbon structural steel
Carbon structural steel
Basic types and dimensions of weld grooves for gas welding, manual arc welding and gas shielded weldingBasic types and dimensions of weld grooves for submerged arc weldingGB 1102
GB 1128
GB 1129 | | tt | GB5117
GB5293
GB5905
GB 5973
Round strand steel wire rope
High strength large hexagon bolts for steel structures
High strength large hexagon nuts for steel structures
High strength washers for steel structures
Technical conditions for high strength large hexagon bolts, large hexagon nuts and washers for steel structuresSteel wire for welding
Low alloy structural steel
Radiography and quality classification of steel fusion welding butt jointsType dimensions of high strength torsion shear bolt connections for steel structuresTechnical conditions for high strength torsion shear bolt connections for steel structuresDesign specification for cranes
Electronic control equipment for cranes
Cylindrical wheels for bridge cranes
Carbon steel welding rods
Flux for submerged arc welding of carbon steel
Test specifications and procedures for cranes
Wedge joints for wire ropes
GB 5974. 1
Ordinary thimbles for wire rope
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1992-06-09506
Implemented on 1993-01-01
GB5974.2Heavy thimbles for wire rope
GB5975Pressure plate for wire rope
GB5976Wire rope clamp
GB 6164.2
Rubber buffer for crane
GB 6334
DC electromagnetic block brake
High quality wire rope
GB 8918
GB 8923
GB9286
GB 10051
GB10095
GB10183
GB11352
JB 6128--92
Surface rust grade and rust removal grade of steel before painting Cross-cut test of paint and varnish film
Lifting hook
Involute cylindrical gear
Manufacturing tolerances of bridge and gantry cranes and track installation Carbon steel castings for general engineering
General technical conditions for packaging of electromechanical products
GB/T 13384
GB/T 14407
General bridge and gantry crane cab
JB741 Technical conditions for welded steel pressure vesselsJB1152 Ultrasonic flaw detection of butt welds of boilers and steel pressure vesselsJB/T6406.1 Types, basic parameters and dimensions of electric hydraulic block brakesJB 6406.21
Technical conditions for electric hydraulic block brakes
ZB J80 006
ZB J80 007
ZB J19 010
ZB J19 011
Cast pulley for crane
Cast drum for crane
Crane reducer
Crane base reducer
ZBK26007
YZ series three-phase asynchronous motor for lifting and metallurgyYZR series three-phase asynchronous motor for lifting and metallurgy with wound rotorZB K26 008
JB/ZQ 4000.3
General technical conditions for welded parts
JB/ZQ4382
Technical conditions for gear couplings
JB/ZQ4292 Spring steel
JJG4 Verification procedures for steel tapes
3 Product classification
3.1 Type
3.1.1 Cranes can be divided into the following categories according to the lifting point:
Single lifting point crane, code SMD, see Figures 1 and 2; a.||t t||Double-point crane. Code SME, see Figure 3 and Figure 4. 3.1.2
2 Cranes can be divided into the following categories according to the operation modes of the trolley and the trolley: a.
One-way crane, code D, see Figure 1 and Figure 3; two-way crane, code S, see Figure 2 and Figure 4. 507
3.2 Basic parameters
JB6128—92
Crane should give priority to the basic parameters specified in Table 1, Table 2, Table 3 and Table 4. 508
6128--92
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6128—92
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(8*9)01*0(0)2900
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(e)0'0(5'2)20'0(2)00
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612 8—
(8*9)9010(0)290'0
92)37*0*(02)885*0*(900220
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08109100101
(8)6810*(8*9)01\0
0210018
02100108
(9)8800| | tt | 210
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6128-92
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(8)601*0(8.9501*0*()880
(S*2)200'0\(2680'0\(9'1220'02
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JB 6128 ---92
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3.3 Model representation method
3.4 ​​Marking example
JB 6128-92
Crane working level
Span, m
Operation mode code, 1) or S
Rated lifting capacity, t
Crane code, SMD or SME
The rated weight of the main hoisting mechanism is 100t, the slewing hoisting mechanism (or auxiliary hoisting mechanism) is 20t. The crane is one-way and has a span of 8m. The crane's working level is A2 single hoist The main lifting mechanism should be marked as: crane SMD100/20-ID8A2JB6128
b. The weight is 2×250t, the slewing hoisting mechanism (or auxiliary hoisting mechanism) is 50t, the crane is bidirectional, the span is 12m, and the working level of the crane is A3. The double-lifting point hydropower station gantry crane should be marked as: crane SME2X250 /50-S12A3JB61284 Technical requirements
General requirements
4.1.1 Environmental conditions
4.1.1.1 The altitude of the crane installation and use site shall not exceed 2000m (if it is greater than 1000m, the motor capacity shall be Check and it should meet the design requirements).
4. 1.1.2 Crane working environment temperature and humidity a. The ambient temperature should be within the range of 25-40°C, and the average temperature within 24 hours should not exceed +35°C; b. The average maximum relative humidity in the wettest month is 90%. Ambient temperature The relative humidity is allowed to reach 100% for a short time when it does not exceed 25%.
4.1.1.3 The wind pressure (equivalent wind level) of the crane should be determined according to the meteorological data of the installation and use location. In the case of particularly reliable data . It is recommended to follow the provisions of Table 5,
Usage location
Water well or
Spillway
Working door or Crane for accident door
Crane for maintenance door
Crane for water inlet of power station, maintenance door or sewage shed tailwater
Crane for tailwater door
Working status 99:
Wind pressure in normal working state 4
Maximum wind pressure in working state 91
Wind pressure in normal working state
Maximum wind pressure in working state g
Normal Working state wind pressure α
Working state maximum wind pressure 4
Normal working state wind pressure 4:
Working state maximum wind pressure:
250~~ 100(7 8)
1 400--600(8~~ 10)
150（6)
250(7)
150(6)|| tt||250(7)
150(6)
250(7)
Pa (equivalent wind level)
Non-working state
800 ~1 200(11 ~13)
600- 800(9 --11)
100~ 600(8-~9)
Note: 1) For riverbed power stations, when the tailwater gate crane is set at the same height as the water inlet, the wind pressure can be calculated based on the water inlet sliding crane: ② For canyon wind outlets Special consideration should be given to factors such as the impact of the vents behind the gate. 515
4.1.2 Crane seismic resistance
JB6128-92
The site, foundation and base of the crane should be Meet the seismic requirements of hydraulic structures. Under this premise, the stability and strength of cranes used in earthquake zones with a magnitude greater than 7 on the Richter scale should be verified under the load of the corresponding earthquake magnitude, and seismic precautions should be taken. 4.1. 3 Welding requirements
4.1.3.1 The form and size of the welding groove shall comply with the requirements of GB985 and GB986. If there are special requirements, they shall be indicated on the drawing. 4.1.3.2 The main beam, legs and other important welds should be subject to external quality inspection. The quality of the butt welds should comply with the BS grade requirements in JB/ZQ4000.3, and the fillet welds should comply with the BK grade assessment. The butt welds of the flange and web of the beam shall be subjected to non-destructive testing. The radiographic testing shall be no less than Level II specified in GB3323, and the ultrasonic testing shall be no less than Level I specified in JB1152. The internal quality of important fillet welds such as legs shall meet the requirements of BK grade in JB/ZQ4000.3. 4.1.3.5 The joint welds of welded coils shall be inspected by radiographic method, and other welds shall be inspected by magnetic particle detection in accordance with the relevant provisions of JB741. 4.1.4 High-strength bolt connections for steel structures
4.1.4.1 The dimensions of non-shear high-strength bolts, nuts and washers shall comply with the provisions of GB1228, GB1229 and GB1230 respectively, and their technical requirements shall comply with those of GB1231. Requirements. Shear type high-strength bolt connection pairs shall comply with the requirements of GB3632.GB3633. 4.1.4.2 High-strength bolt connection pairs shall be tightened with a torque wrench. After tightening, the contact shall be tightly fitted and the required tightening torque shall be achieved. | |tt||4.2 Performance in use
4.2.1 The lifting capacity of the crane should reach the rated lifting capacity. 4.2.2 Parameters related to the crane shall comply with Article 3.2 and the requirements of the user in the order contract. 4.2.3 Static rigidity of the crane
Under the rated load G, the mid-span of the main beam of the bidirectional crane The deflection value should not be greater than S/700, and the deflection value at the cantilever beam end should not be greater than L (L1,)/350 (L1, L are the effective cantilever lengths at the left and right ends); the beams of the upper frame of a one-way crane shall not have permanent 4.2.4 If the lifting mechanism adopts electrical control method, it shall ensure that when descending within the range of 0.2~1.0G, the motor speed before braking drops to less than 1/3 of the synchronous speed of the motor.
4.3 Main Components
4.3.1 Gantry (after the trolley running mechanism is assembled) 4.3.1.1 Camber of the gantry main beam and upper frame structure a. Main beam of a two-way crane The camber △F=（0.9/1000～1.4/1000）S, and the maximum camber is controlled within the range of S/10 in the mid-span, see Figure 5;
b. Upper frame of one-way crane The camber of each beam is △F, ≥ 0, see Figure 6; c. If there is a cantilever, the camber of the cantilever end (at the effective cantilever) is △F (△F2) - (0.9/350~1.4/350) L/ (L) See Figure 5; d. The camber and warp should be measured without the influence of sunlight and temperature. The test conditions are shown in Appendix A (supplement). 4.3.1.2 The horizontal curvature f of fully off-track box beams, single web beams and truss beams is ≤ 15 mm and shall meet the requirements of Articles 4.3.1.9 and 4.3.1.10; the on-track box beam without a platform The horizontal curvature of the semi-deflected box beam is f≤S3/2000, and the curvature direction must be outward. S is the measured distance between the first large rib plate at both ends of the main beam. This value should be within 100 meters from the upper wing. Measured at the web of the flange plate about 100mm. See Figure 5.
4.3.1.3 Diagonal difference of the portal frame superstructure /D, -Dz, 1D: -D1 should not be greater than 5mm, see Figure 5, Figure 6: This value can be measured before installing the legs.
JB612892
4.3.1.4 When the gantry (load-bearing beam, side gantry, slewing boom) is a truss structure, the bending value of its main members f (f.) ≤ 1.5L (L :)/1000 (L, L, is the rod length), see Figure 7a (bearing beam) and Figure 7b (side door frame). When the arm and column of the slewing crane are solid-web structures, the bending value is not greater than one thousandth of the rod length or column length, but the maximum value does not exceed 15mm.
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