GB/T 14783-1993 Technical requirements for rubber-tyred container gantry cranes
Some standard content:
National Standard of the People's Republic of China
Technical Specifications for Rubber Tired Container Gantry CranesRubber Tired Transtainer-Specifications1 Subject Content and Scope of Application
This standard specifies the technical requirements for rubber tire container gantry cranes (hereinafter referred to as cranes). This standard applies to cranes that load and unload containers of 20320 kg or more. 2 Reference Standards
Technical Specifications for High-Quality Carbon Structural Steel
GB700 Carbon Structural Steel
Basic Types and Dimensions of Weld Bevels for Gas Welding, Manual Arc Welding and Gas Shielded Welding GB 985
GB986Basic Types and Dimensions of Weld Bevels for Submerged Arc Welding GB 1102 Round Strand Steel Wire Rope
GB1182～1184 Tolerances on Shape and PositionbZxz.net
GB/T 14783--93
Technical Specifications for High-Strength Large Hexagonal Bolts, Large Hexagonal Nuts, Washers for Steel Structures GB 1228~~1231
GB1300
GB1413
GB1497
GB1591
Welding wire
External dimensions and rated weight of container
Basic standards for low-voltage electrical appliances
Low alloy structural steel
GB1801~1804Tolerances and fits
GB2893
GB 2894
GB 3077
GB3220
GB3323
GB3766
GB3811
Safety colour
Safety signs
Alloy structural steel
Technical conditions
Dimensions and lifting capacity of container spreadersRadiography and quality classification of series steel fusion welded butt jointsGeneral technical conditions for hydraulic systems
Design specification for cranes
GB 4942. 1
GB 4942. 2
GB 5117
GB 5118
GB 5676
GB5905
GB 6067
GB6974
GB 8918
Protection grade of motor housing
Protection grade of low-voltage electrical housing
Carbon steel welding rod
Low alloy steel welding rod
Casting carbon steel for general engineering
Crane test specifications and procedures
Safety regulations for lifting machinery
Terms and terms of lifting machinery
High-quality steel wire rope
Approved by the State Administration of Technical Supervision on December 30, 1993 510
Implemented on August 1, 1994
GB 8923
GB10095
GB10096
GB 10183
GB 11345
GB/T14783--93
Surface rust grade and rust removal grade of steel before paintingInvolute cylindrical gear accuracy
Rack accuracy
Tolerances for manufacturing and track installation of bridge and gantry cranesManual ultrasonic flaw detection method and flaw detection result classification of steel weldsCB*3123
JB2299
JB2759
JT5020
JT 5028
3 Terms
Quality standard of gas-cut surface of rolled steel
Painting color and safety mark of mining, engineering and lifting and transportation machinery productsGeneral technical conditions for packaging of electromechanical products
Operator's cab of port loading and unloading machinery
Rolling pulley
3.1 Lifting capacity capacity
The mass of containers that can be lifted under the container spreader of the crane. 3.2 Rated capacity
The sum of the mass of containers that can be lifted by the crane and the mass of the container spreader. 3.3 Lifting height Hlifting height
The maximum vertical distance between the bottom plane of the container spreader's rotary lock and the ground (see Figure 1). 3.4 Maximum container stacking height The highest number of layers of containers that the crane can stack. 3.5 One over high containers operation The highest number of layers of containers that can be passed on the site when the crane spreader is loaded with containers. 3.6 S span
The horizontal distance between the center lines of the tire width under the two leg supports of the crane (see Figure 1). Main beam
Lifting gear lock bottom plane
Trolley frame
3.7 Base distance Bbase
GB/T 14783—93
Horizontal distance between the center lines of the gantry support in the main operating direction of the crane (see Figure 2). Figure 2
4 Technical requirements
Trolley frame
The design, manufacture and installation of this product shall be carried out in accordance with the drawings and relevant technical documents approved by the prescribed procedures, and shall comply with the requirements of this standard.
4.1 Working conditions
4.1.1 The working environment temperature is -20～+45℃, and the maximum relative humidity is not less than 95% (with condensation)1)4.1.2 The wind speed is not more than 20m/s when working, and not more than 44m/s when not working. Note; 1) If there are special requirements, it shall be carried out according to the agreement between the supplier and the demander. 4.1.3 The working level of the crane should be A6 or A7. 4.1.4 The ground slope of the crane walking channel should not exceed 1%, and the local slope should not exceed 3%. The ground slope of the walking channel on both sides of the span should be in the same direction, that is, uphill or downhill.
4.2 Allowable deviation of the main movement speed
a. The lifting speed is 0~10% of the nominal value. b. The trolley running speed is 0~+10% of the nominal value. c. The trolley running speed is ±10% of the nominal value. 4.3 Materials
4.3.1 The materials of the main parts should have a factory certificate of conformity issued by the material manufacturer, otherwise, samples should be taken for testing, and their chemical composition and mechanical properties should meet the standards. The use of materials other than those specified in this standard should have a reliable theoretical or experimental basis and a visa from the technical department of the crane manufacturer.
4.3.2 The materials used for the main load-bearing components in the metal structure of the crane shall not be lower than those specified in Table 1. Table 1
Working environment temperature
Not lower than -20℃
Q235-B
Equal to or lower than -20℃
Q235-C
GB/T 14783-93
Steel No. Q235-BQ235-C shall comply with the provisions of GB700; 16Mn shall comply with the provisions of GB1591. 4.3.3 The hoisting drum shall adopt a welded structure, and its material shall not be lower than the Q235-B steel in GB700. 4.3.4 The hoisting wire rope pulley shall adopt a rolled welded structure, and the material of the pulley rim shall not be lower than 35 steel in GB699. 4.3.5 The material of the gear and trolley wheel shall not be lower than 45 steel in GB699. 4.3.6 The material of the coupling shall not be lower than 45 steel in GB699 or ZG310-570 cast steel in GB5676. 4.3.7 The material of the gear shaft and pulley shaft shall not be lower than 35 steel in GB699. 4.3.8 The material of the container spreader lock shall not be lower than 40Cr steel in GB3077. 4.4 Mechanical and electrical accessories
4.4.1 All purchased mechanical and electrical accessories must have a product certificate or warranty and corresponding technical documents, otherwise they shall not be installed and used. 4.5 Structural parts
4.5.1 The allowable deviation of the structural parts shall comply with the provisions of Table 2. Table 2
Inspection items
Straightness of components
a. Vertical direction
b. Horizontal direction
Beam camber deviation
Twisting at both ends of box beam (I-beam)
Verticality of web of box beam (I-beam)
Allowable deviation
2000 yuan
AF+0.40 F
FCamber specified in the drawing
Beam length
>5 000～10 000
>10000~20000
>20 000 ~ 30 000
>30 000~50 000
h≤2oH
(This value is measured at the rib plate or node)
Inspection items
Flatness of I-beam flange plate
Horizontal inclination of upper flange of box beam (I-beam)
Height difference of matching beam
Component size deviation and diagonal deviation
Relative position deviation of rib plate (partition plate)
b, verticality of rib plate (partition plate) to web plate or cover plate of box beam (I-beam)
Waviness of web plate of box beam (I-beam)
GB/T 14783-93
Continued Table 2
Allowable deviation
(F value is measured at the rib plate)
(f value is measured at the rib plate)
AH≤B
but not more than 10
(H is measured at the rib plate)
When length Ls<7000;
AL≤3, ID,- Dz/≤4
When length Lz≥7000:
AL≤5, ID,-D,/≤7
f≤roooB
Check with a 1 m straight ruler
In the area of compression zone number H:
f≤0.7; but there is no more than one concave
convex between adjacent rib plates
b. In the rest of the area: f<1.2
Inspection items
Waviness of flange plate of box beam (I-beam)Waviness of control room wall
Waviness of machine room wall
Waviness of roof
Waviness of platform
Misalignment of through rib plate
Verticality of ear plate of bearing
b. Deviation of bearing opening size
Deformation deviation of flange surface angle
GB/T14783—93
Continued Table 2
Allowable deviation
Check with 1m ruler≤3
Check with 1m ruler
f≤5;
b, f≤6;
c, f≤10;
d. f≤8
4.5.2 Any cutting surface that affects the performance and appearance of the product shall not be lower than Grade 2 specified in CB"3123. 4.5.3 The welding rods used for welding structural parts shall comply with the provisions of GB5117, GB5118, and GB1800. The type of welding rod selected shall be adapted to the material strength of the main component and the type of load on the weld. The selection of automatic or semi-automatic welding wire and flux shall be adapted to the material strength of the main component.
4.5.4 The weld type must comply with the provisions of GB985 and GB986. 4.5.5 The quality of the butt welds of the main load-bearing structural parts (such as main beams, outriggers, trolley frames, trolley frames, hanger frames, and lifting reels) shall not be lower than Grade I specified in GB11345 and Grade I specified in GB3323. Welding work must be qualified by the relevant departments specified by the state. Qualified welders shall be responsible for the work and the welder code shall be stamped. 4.5.6 Important welds welded during on-site installation (such as main beam and outrigger, outrigger and saddle beam) shall be marked on the actual object by steel stamping or painting, indicating "important installation welds", and must be inspected according to the requirements of technical documents. 4.5.7 High-strength bolts, nuts and washers used to connect metal structural parts shall comply with the provisions of GB1228~1231. 4.6 Main components
4.6.1 Gears and reducers
4.6.1.1 Gears shall be heat treated and medium-hard tooth surfaces or hard tooth surfaces shall be used as much as possible. 4.6.1.2 The accuracy of the gear pair shall not be lower than the 8-8-7 level specified in GB10095. The accuracy of the rack pair shall not be lower than the 9-8-8 level specified in 515
of GB10096.
GB/T 14783—93
4.6.1.3 The reducer housing welded with steel plates shall be annealed to eliminate internal stress. 4.6.1.4 When the reducer is running at the working speed without load, the noise shall not be greater than 85dB (A) when measured on the contour line of the housing split surface, 1m away from the front, back, left and right of the reducer. The motor should not jump or hit when started. 4.6.1.5 Under normal lubrication conditions, after the reducer runs at the working speed without load for 1 hour in both forward and reverse directions, the temperature rise at the bearing shall not exceed 45℃. And the absolute value shall not be greater than 80℃. The temperature rise of the lubricating oil shall not exceed 70℃, and the absolute value shall not be greater than 80℃. 4.6.1.6 The clearance of the joint surface of the reducer housing shall not exceed 45℃ at any time. The diameter should not exceed 0.03mm at any place, and ensure that there is no oil leakage. 4.6.2 Brake wheel and brake
4.6.2.1 The selection and use of brakes shall comply with the requirements of Article 4.2.1.3 of GB3811 and Article 2.6 of GB6067. 4.6.2.2 The end face runout of the disc of the disc brake directly mounted on the shaft shall not be greater than 0.2mm. 4.6.2.3 The radial circular runout tolerance value of the brake wheel to the reference axis shall not be lower than Grade 7 in GB1184. The radial circular runout of the brake wheel directly mounted on the shaft shall not be lower than Grade 9 in GB1184. 4.6.2.4 After three full compressions, the brake spring shall not have permanent deformation. 4.6.3 Coupling
4.6.3.1 The relative radial circular runout △Y and relative end face circular runout △X deviation values of the two half couplings of the elastic ring pin coupling are shown in Table 3 and Figures 3 and 4.
100~180
>180~280
>280~380
>380~500
4.6.4 Wire rope
4.6.4.1 The nominal tensile strength of the steel wire shall not be less than 1550N/mm2, nor greater than 1850N/mm. The steel wire rope shall generally consist of no less than six strands, and each strand shall not be less than 19 steel wires. Line contact steel wire rope is preferred. 4.6.4.2 The steel wire toughness number shall adopt the symbol or No. 1 in GB1102 or GB8918. 4.6.4.3 The steel wire rope shall not be used in a long extension.
4.6.4.4 The requirements for fixing the ends of the steel wire rope shall comply with the provisions of Article 2.2 of GB6067. 4.6.5 Pulley
4.6.5.1 The ratio of the nominal diameter of the pulley to the nominal diameter of the wire rope shall comply with the provisions of Article 4.4.2.3 of GB3811. The maximum permissible angle of deflection of the wire rope when winding in or out of the pulley shall not exceed 5°. 4.6.5.2 The pulley shall be equipped with a wire rope anti-slip groove device, and the gap between the anti-slip groove device and the outermost edge of the pulley shall not exceed 516
20% of the wire rope diameter.
GB/T14783--93
4.6.5.3 The manufacturing deviation of the rolled pulley shall comply with the provisions of JT5028. 4.6.6 Coil
4.6.6.1 The ratio of the nominal diameter of the coil to the wire rope diameter shall comply with the provisions of Article 4.4.2.3 of GB3811. 4.6.6.2 When the wire rope is wound into or out of the drum, the angle of deviation from the vertical plane of the drum axis should not exceed 3.5° for a spiral grooved drum; it should not exceed 2° for a bare drum and a multi-layer winding drum. The drum should be equipped with a device to prevent the wire rope from slipping out of the groove. 4.6.6.3 After the hoisting drum is grooved, the wall thickness deviation shall not exceed 3mm. 4.6.7 Wheels
4.6.7.1 The accuracy of the wheel tread diameter shall not be lower than h9 grade in GB1801 and 1802. 4.6.7.2 The circular runout tolerance of the wheel tread to the reference axis shall not be lower than 9 grade in GB1184. 4.6.7.3 The wheels should be made of rolled steel.
4.6.8 Hydraulic system
4.6.8.1 The hydraulic system shall comply with the provisions of GB3766. Before assembling the hydraulic system, the joints, pipes and channels (including casting core holes and drilled holes) must be cleaned and no dirt (iron filings, burrs, fibrous impurities, etc.) is allowed to exist. 4.6.8.2 The main hydraulic components (oil cylinders, oil pumps, valves, etc.) should have a certificate of conformity issued by the manufacturer. The hydraulic system should have a safety device to prevent overload and impact. The pressure adjusted by the overflow valve shall not be greater than 4.6.8.3
110% of the rated working pressure of the system.
The oil tank should have sufficient capacity. In the absence of a cooling device, the circulation cycle of the hydraulic oil should not be less than 2 minutes, and the working oil temperature should not exceed 60°C.
4.6.8.5 In areas where the ambient temperature is below -5°C, a heating device should be installed in the hydraulic oil tank. 4.6.9 Tires
4.6.9.1 The inflation pressure of the tire shall comply with the regulations of the tire manufacturer, and the error shall not exceed 3%. 4.7 Main components
4.7.1 Gantry (composed of main beam, outriggers and saddle beam) 4.7.1.1 After the gantry is fully installed and welded (including the trolley track), the camber of the main beam is (0.9/1000～1.4/1000)S, where S is the span. This camber should be measured without the influence of sunlight and temperature difference. 4.7.1.2 The vertical distance of any point on the top surface of the main beam (the intersection of the trolley track gauge and the wheelbase) to the plane formed by the other three points shall not be greater than 0.1% of the track gauge, see Figure 5.
4.7.1.3 Allowable deviation value △K of trolley track gauge K: The track gauge is set in the middle of the box beam: △K = 4mm, see Figure 6. 517
GB/T14783-93
The track gauge is set inside the box beam: AK = 0~+8mm, see Figure 7. K'
The tension value and correction value used to measure the track gauge are shown in Appendix A. 4.7.1.4 On the same cross section, the height error AH of the left and right track top surfaces shall not be greater than 0.15% of the track gauge, and the maximum value shall not exceed 10mm, see Figure 8.
AH-0.0015K.10
4.7.1.5 The position deviation between the center line of the trolley track and the center line of the web supporting the track beam shall not be greater than 1/2 of the web thickness, see Figure 9. 518
GB/T14783-93
4.7.1.6 The local bending of the track in the plane of laying shall not be greater than 1mm within any 2m range, see Figure 10. Within the full length: when the track is located in the middle of the box beam, the lateral deviation between the center line of the trolley track and the theoretical center line of the track shall not be greater than 2.5mm; when the track is located on the inner side of the box beam, the lateral deviation from the theoretical center line of the track shall not be greater than 4mm outward and 1mm inward, see Figure 11.
Theoretical centerline of track
4.7.1.7 The trolley track should be a whole track or a whole track welded with joints, otherwise it must meet the following requirements: the height difference of the track surface at the track joint shall not be greater than 1mm; the side left and right misalignment difference shall not be greater than 1mm; the gap should be 0~2mm. 4.7.1.8 If only horizontal guide wheels are used on one track, the track gauge limit deviation can be 3 times the data in Article 4.7.1.3. The straightness requirements for non-guided tracks in Article 4.7.1.6 can be reduced. 4.7.2 Trolley frame
4.7.2.1 The wheel gauge error measured from a pair of wheels on the same axis shall not be greater than ±2mm. The relative difference between the two wheel gauges K1 and K2 shall not be greater than 2mm.
4.7.2.2 The horizontal deflection value of the wheel is P≤(0.4/1000)L, L is the measurement length, and the horizontal deflection direction is shown in Figure 12. 519
Wheelbase K
GB/T14783—93
4.7.2.3 The vertical deflection value of the wheel is a=（0～2.5/1000）L, L is the measuring length, the positive sign is the upper end outward, see Figure 13 (measured when the wheel is not loaded).
4.7.2.4 The isotropic difference 3 of the wheels on the same side of the track shall not be greater than 2mm, see Figure 14. Wheelbase
If horizontal guide wheels are used, the deviation between the center line between the two guide wheels on one side and the center line of the track shall not be greater than 1mm, see 4.7.2.5
Figure 15.
Two guide wheels jump away
4.7.3 Lifting mechanism
GB/T 14783—93
Two guide wheels are away from the center line
Track center line
4.7.3.1 The working level of the lifting mechanism should be M6.M7.4.7.3.2 The lifting mechanism should adopt constant power speed regulation. The guide wheel is away from the center line
The distance between the two guide wheels
4.7.3.3 The capacity of the motor can be determined by the heat generated by the rated lifting weight in the working cycle, but an overload check must be performed. 4.7.3.4 The acceleration (deceleration) speed of the object started or braked by the mechanism can be 0.3~~0.6m/s. When unloaded (only carrying the hoisting device), the acceleration (deceleration) speed should be selected at a larger value.
4.7.3.5 Open gear transmission should not be used. 4.7.4 Trolley operating mechanism
4.7.4.1 The working level of the trolley operating mechanism should be M6 or M7. 4.7.4.2 The static resistance of operation should comply with the provisions of Article 4.2.2.1 of GB3811, where the equivalent slope resistance should include the main beam camber resistance, road slope resistance, tire deformation slope resistance, etc. 4.7.4.3 The horizontal inertia force caused by the acceleration (deceleration) of operation should not cause the wheels to slip under the most unfavorable conditions of wind load and slope. 4.7.4.4 The acceleration (deceleration) value and the corresponding acceleration (deceleration) time of the operating mechanism for starting or braking shall be selected in accordance with Appendix C of GB3811. 4.7.5 Cart operating mechanism
4.7.5.1 The working level of the trolley operating mechanism should be M5 or M6. 4.7.5.2 The operating speed of the trolley can generally be divided into the unloaded (only carrying the hoisting device) operating speed and the fully loaded operating speed. The box-carrying operation is to shift the box in a short distance, and its speed value can be equal to or greater than 25m/min. 4.7.5.3 The steering of the trolley operating mechanism must have differential steering of the driving wheels on both sides to keep the crane running straight and 90° steering for lateral travel.
4.7.5.4 The 90° steering system is carried out under the condition of no load and non-operating trolley, and it is advisable to carry out it under the specific road surface at the designated location. 4.7.5.5 The brake of the trolley operating mechanism should have a simple mechanical method to release the brake to facilitate the towing of the crane. 4.7.5.6 On cranes that do not adopt fixed-axis steering, a manual control device should be installed so that each tire can be turned to any angle less than 90°. 4.7.6 Power unit
4.7.6.1 Devices for controlling engine starting, acceleration (deceleration) and parking should be installed near the engine and in the driver's cab. 4.7.6.2 The capacity of the engine fuel tank should be able to ensure the crane's 36-hour operation, and there should be an indicator to clearly mark the oil level. 4.7.6.3 In areas below -5°C, the engine should be equipped with an appropriate starting heating device according to the cold conditions. 4.7.6.4 In addition to its own charging equipment, the engine should also be equipped with equipment that can be charged with shore power. 4.7.7 Spreader slewing mechanism
When the spreader is 2.4m above the ground, the spreader should be able to slew ±5° along the longitudinal center line in the horizontal plane. 4.7.8 Anti-sway device
The crane should be equipped with an anti-sway device that can suppress the sway of the spreader or the spreader and the container. The device can automatically suppress the sway in the running direction of the trolley and the trolley. 4.7.9 Container spreaderThe straightness requirements of the non-guided track in Article 6 can be reduced. 4.7.2 Trolley frame
4.7.2.1 The wheelbase error measured from a pair of wheels on the same axis shall not be greater than ±2mm. The relative difference between the two wheelbases K1 and K2 shall not be greater than 2mm.
4.7.2.2 The horizontal deflection value of the wheel is P≤(0.4/1000)L, L is the measuring length, and the horizontal deflection direction is as shown in Figure 12. 519
Wheelbase K
GB/T14783—93
4.7.2.3 The vertical deflection value of the wheel is a=（0～2.5/1000）L, L is the measuring length, and the positive sign is from the upper end to the outside, see Figure 13 (measured when the wheel is not under load).
4.7.2.4 The isotropic difference 3 of the wheels on the same side track shall not be greater than 2mm, see Figure 14. Wheelbase
If horizontal guide wheels are used, the deviation between the center line of the two guide wheels on one side and the center line of the track shall not exceed 1mm, see 4.7.2.5
Figure 15.
Two guide wheels jump away
4.7.3 Lifting mechanism
GB/T 14783—93
Two guide wheels this distance from the center line
Track center line
4.7.3.1 The working level of the lifting mechanism should be M6.M7.4.7.3.2 The lifting mechanism should adopt constant power speed regulation. Guide wheel away from the center line
Distance between two guide wheels
4.7.3.3 The capacity of the motor can be determined by the heat generated during the working cycle according to the rated lifting weight, but an overload check must be carried out. 4.7.3.4 The acceleration (deceleration) of the object when the mechanism starts or brakes can be 0.3~~0.6m/s. The acceleration (deceleration) when unloaded (only carrying the sling) should be a larger value.
4.7.3.5 Open gear transmission should not be used. 4.7.4 Trolley operating mechanism
4.7.4.1 The working level of the trolley operating mechanism should be M6 or M7. 4.7.4.2 The static resistance of operation should comply with the provisions of Article 4.2.2.1 of GB3811, in which the equivalent slope resistance should include the main beam camber resistance, road slope resistance, tire deformation slope resistance, etc. 4.7.4.3 The horizontal inertia force caused by the acceleration (deceleration) of operation should not cause the wheels to slip under the most unfavorable working conditions of wind load and slope. 4.7.4.4 The acceleration (deceleration) value and the corresponding acceleration (deceleration) time of the operating mechanism when starting or braking shall be selected according to Appendix C of GB3811. 4.7.5 Trolley operating mechanism
4.7.5.1 The working level of the trolley operating mechanism should be M5 or M6. 4.7.5.2 Trolley operating speed~ Generally, it can be divided into unloaded (only carrying sling) operating speed and fully loaded operating speed. The box-carrying operation is to shift the box over a short distance, and its speed value can be equal to or greater than 25m/min. 4.7.5.3 The steering of the trolley operating mechanism must have differential steering of the driving wheels on both sides to keep the crane running straight and 90° steering for lateral travel.
4.7.5.4 The 90° steering system is carried out under unloaded and non-operating conditions of the trolley, and should be carried out on a specific road surface at a designated location. 4.7.5.5 The brake of the trolley operating mechanism should have a simple mechanical method to release the brake in order to tow the crane. 4.7.5.6 On cranes that do not adopt fixed-axis steering, a hand control device should be installed so that the tires can be turned to any angle less than 90°. 4.7.6 Power plant
4.7.6.1 There should be devices for starting, accelerating (decelerating) and stopping the engine near the engine and in the driver's cab. 4.7.6.2 The capacity of the engine fuel tank should be able to ensure the crane's 36-hour operation, and there should be an indicator to clearly mark the oil level. 4.7.6.3 In areas below -5°C, the engine should be equipped with an appropriate starting heating device according to the cold conditions. 4.7.6.4 In addition to the charging equipment provided by the engine, the engine should also be equipped with equipment that can be charged with shore power. 4.7.7 Spreader slewing mechanism
When the spreader is 2.4m above the ground, the spreader should be able to slew ±5° along the longitudinal centerline in the horizontal plane. 4.7.8 Anti-sway device
The crane should be equipped with an anti-sway device that can suppress the sway of the spreader or the spreader and the container. The device can automatically suppress the sway in the running direction of the trolley and the trolley. 4.7.9 Container spreaderThe straightness requirements of the non-guided track in Article 6 can be reduced. 4.7.2 Trolley frame
4.7.2.1 The wheelbase error measured from a pair of wheels on the same axis shall not be greater than ±2mm. The relative difference between the two wheelbases K1 and K2 shall not be greater than 2mm.
4.7.2.2 The horizontal deflection value of the wheel is P≤(0.4/1000)L, L is the measuring length, and the horizontal deflection direction is as shown in Figure 12. 519
Wheelbase K
GB/T14783—93
4.7.2.3 The vertical deflection value of the wheel is a=（0～2.5/1000）L, L is the measuring length, and the positive sign is from the upper end to the outside, see Figure 13 (measured when the wheel is not under load).
4.7.2.4 The isotropic difference 3 of the wheels on the same side track shall not be greater than 2mm, see Figure 14. Wheelbase
If horizontal guide wheels are used, the deviation between the center line of the two guide wheels on one side and the center line of the track shall not exceed 1mm, see 4.7.2.5
Figure 15.
Two guide wheels jump away
4.7.3 Lifting mechanism
GB/T 14783—93
Two guide wheels this distance from the center line
Track center line
4.7.3.1 The working level of the lifting mechanism should be M6.M7.4.7.3.2 The lifting mechanism should adopt constant power speed regulation. Guide wheel away from the center line
Distance between two guide wheels
4.7.3.3 The capacity of the motor can be determined by the heat generated during the working cycle according to the rated lifting weight, but an overload check must be carried out. 4.7.3.4 The acceleration (deceleration) of the object when the mechanism starts or brakes can be 0.3~~0.6m/s. The acceleration (deceleration) when unloaded (only carrying the sling) should be a larger value.
4.7.3.5 Open gear transmission should not be used. 4.7.4 Trolley operating mechanism
4.7.4.1 The working level of the trolley operating mechanism should be M6 or M7. 4.7.4.2 The static resistance of operation should comply with the provisions of Article 4.2.2.1 of GB3811, where the equivalent slope resistance should include the main beam camber resistance, road slope resistance, tire deformation slope resistance, etc. 4.7.4.3 The horizontal inertia force caused by the acceleration (deceleration) of operation should not cause the wheels to slip under the most unfavorable working conditions of wind load and slope. 4.7.4.4 The acceleration (deceleration) value and the corresponding acceleration (deceleration) time of the operating mechanism when starting or braking shall be selected according to Appendix C of GB3811. 4.7.5 Trolley operating mechanism
4.7.5.1 The working level of the trolley operating mechanism should be M5 or M6. 4.7.5.2 Trolley operating speed~ Generally, it can be divided into unloaded (only carrying sling) operating speed and fully loaded operating speed. The box-carrying operation is to shift the box over a short distance, and its speed value can be equal to or greater than 25m/min. 4.7.5.3 The steering of the trolley operating mechanism must have differential steering of the driving wheels on both sides to keep the crane running straight and 90° steering for lateral travel.
4.7.5.4 The 90° steering system is carried out under unloaded and non-operating conditions of the trolley, and should be carried out on a specific road surface at a designated location. 4.7.5.5 The brake of the trolley operating mechanism should have a simple mechanical method to release the brake in order to tow the crane. 4.7.5.6 On cranes that do not adopt fixed-axis steering, a hand control device should be installed so that the tires can be turned to any angle less than 90°. 4.7.6 Power plant
4.7.6.1 There should be devices for starting, accelerating (decelerating) and stopping the engine near the engine and in the driver's cab. 4.7.6.2 The capacity of the engine fuel tank should be able to ensure the crane's 36-hour operation, and there should be an indicator to clearly mark the oil level. 4.7.6.3 In areas below -5°C, the engine should be equipped with an appropriate starting heating device according to the cold conditions. 4.7.6.4 In addition to the charging equipment provided by the engine, the engine should also be equipped with equipment that can be charged with shore power. 4.7.7 Spreader slewing mechanism
When the spreader is 2.4m above the ground, the spreader should be able to slew ±5° along the longitudinal centerline in the horizontal plane. 4.7.8 Anti-sway device
The crane should be equipped with an anti-sway device that can suppress the sway of the spreader or the spreader and the container. The device can automatically suppress the sway in the running direction of the trolley and the trolley. 4.7.9 Container spreader
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.