This technical specification is intended to provide a comprehensive set of technical parameters and performance requirements for the latest customized 450t gantry crane in detail to ensure that it can meet the various needs of hull manufacturing on the slipway. This crane is designed for the slipway operating environment and has powerful lifting, turning, lifting and moving functions.
This crane can not only cope with the complex and changeable working conditions in the hull manufacturing process, but also complete various operating tasks efficiently under the premise of ensuring safety. Its technical parameters and performance requirements have been strictly tested and verified to ensure that it can still operate stably in various harsh working environments and has excellent durability and reliability.
At the same time, in order to meet the various needs of the crane in the hull manufacturing process, we have also comprehensively optimized the design of the crane to improve its overall performance and operating efficiency. Whether it is lifting height, lifting capacity or ease of operation, it has reached the industry-leading level.
Model and structure
Model overview: 450tX71m shipbuilding gantry crane is a heavy-duty lifting equipment designed for large-scale shipbuilding projects. It is a large-span and large-lifting height crane with small upper and lower models. It has excellent carrying capacity and a wide operating range, and is an indispensable and important tool for the shipbuilding industry.
Detailed explanation of structural composition: The entire 450tX71m shipbuilding gantry crane is mainly composed of three parts: metal structure, mechanical equipment and electrical control device. Each part cooperates with each other to ensure the stable and efficient operation of the crane.
Metal structure: The metal structure is the skeleton of the crane, carrying the weight and operating load of the entire equipment. It includes key components such as the main beam, rigid outriggers, flexible outriggers, lower crossbeams, trolley power supply brackets, trolley running tracks, and escalator railings. These components are manufactured through precise design and process to ensure the structural strength and stability of the crane.
Mechanical equipment: The mechanical equipment is the power core of the crane and is responsible for driving the crane to perform various actions. It includes two trolleys and their operating mechanisms, power supply devices, crane trolley operating mechanisms, windproof rail clamps and anchoring devices. These devices realize the precise, fast and reliable operation of the crane through advanced transmission and control technologies.
Electrical control device: The electrical control device is the nervous system of the crane, responsible for controlling and monitoring the operating status of the crane. It includes key components such as elevator, linkage platform in the cab, lifting capacity display, electrical control panel, resistor and electrical control circuit. These components realize the automation, intelligence and remote monitoring functions of the crane through the intelligent control system, greatly improving the operation efficiency and safety.
Technical parameters
Lifting capacity:
Lifting capacity of upper trolley: 2×150t, the allowable lifting capacity difference between the two hooks is 50t.
Lifting capacity of lower trolley: main hook 250t, auxiliary hook 20t.
The weight of the upper and lower trolleys turning over the hull section in the air: 300t.
The maximum weight of the upper and lower trolleys jointly lifting the main engine (the distance between the two trolleys ≥15m): 450t.
Lifting capacity of maintenance crane: 5t.
Crane span and base distance: span 71m, base distance 28m.
Lifting height:
Lifting height of upper trolley: 70m.
Lifting height of lower trolley: main hook 70m, auxiliary hook 70m.
Lifting height of maintenance crane: 82.7m.
Working speed of each mechanism of the crane:
Upper trolley hook: When the lifting weight is 150t, the speed is 0~5m/min; when the lifting weight is 60t, the speed is 0~10m/min.
Lower trolley: When the main hook lifts 250t, the speed is 0~5m/min; when the main hook lifts ≤100t, the speed is 0.5~10m/min; when the auxiliary hook lifts 20t, the speed is 1~10m/min; when the auxiliary hook lifts ≤8t, the speed is 1~20m/min.
Trolley travel speed (when the wind speed is ≤14m/s): 0~30m/min.
Crane travel speed: 0~45m/min.
Maintenance crane lifting speed: 8m/min.
Other parameters:
Distance between the lifting point and the center line of the rigid leg track: 4m for the upper trolley, 5m for the main hook of the lower trolley, and 2m for the auxiliary hook of the lower trolley.
The distance between the lifting point and the center line of the flexible leg track is: 4m for the upper trolley, 4m for the main hook of the lower trolley, and 7m for the auxiliary hook of the lower trolley.
Crane travel track: QU100.
Maximum wheel pressure of the crane travel wheel: 440KN.
The installed capacity of the whole machine: about 1000KW, three-phase four-wire system, 6.6KV50Hz, and can be powered by a cable drum device.
Design and manufacturing standards
Crane design and manufacturing must comply with the following standards and specifications:
GB3811-83 "Crane Design Specifications"
GB6067-85 "Safety Regulations for Lifting Machinery"
GB5905-86 "Crane Test Specifications and Procedures"
GB/T14406-93 "General Gantry Crane"
GB50278-98 "Construction and Acceptance Specifications for Lifting Equipment Installation Projects"
CB/T8504-95 "Technical Regulations for Gantry Cranes in Shipyards"
Detailed description of materials and components
For the main structural parts of the crane, such as the main beam, rigid outriggers, flexible outriggers, etc., we strictly use Q345B high-quality steel plates for manufacturing, or use marine steel plates with a yield limit equivalent to Q345B to ensure their high strength, high toughness and good welding performance. These structural parts are the main load-bearing parts of the crane, so the use of high-quality materials is crucial.
The main load-bearing components such as the upper trolley frame, the lower trolley frame, and the large balance beam of the crane walking mechanism are also made of Q345B high-quality steel plates, and are pre-treated before manufacturing, such as sandblasting and anti-corrosion treatment, to improve the corrosion resistance and service life of the steel.
All parts on the crane, including bolts, nuts, bearings, gears, etc., are made of high-quality steel or other high-strength and high-wear-resistant materials to ensure their strength, rigidity and stability. We pay attention to every detail to ensure the stability and reliability of the overall performance of the crane.
Comprehensive analysis of safety devices and protection measures
Safety protection devices such as lifting height limiter, lifting weight limiter and overspeed protection must be installed on the crane. These devices can monitor the operating status of the crane in real time. Once an abnormal situation is found, measures should be taken immediately to ensure the safety of personnel and goods.
Travel switches or travel limit bumpers should be installed on the upper and lower trolley walking mechanisms and the crane trolley walking mechanisms, and buffer devices should be installed at both ends of the upper and lower trolleys to prevent the crane from colliding or exceeding the set range during operation, causing damage or accidents.
We specially installed two sets of trolley walking correction devices to ensure that the crane remains stable during walking by real-time monitoring and adjusting the walking distance deviation between the rigid legs and the flexible legs to avoid dangerous situations such as tilting or overturning.
At the highest point of the crane, we set up air defense lights and anemometers. Air defense lights can provide sufficient light at night so that operators can clearly see the surrounding environment and goods; while anemometers can monitor wind speed and wind direction in real time to ensure that the crane can operate safely in bad weather. These measures together constitute a comprehensive safety protection system for the crane, providing a strong guarantee for the safety of personnel and goods.
Natural conditions and working environment requirements
Wind pressure: The gantry crane can withstand a wind pressure of 250N/m² under the condition of maximum working wind force 7. At the same time, in order to ensure the safety of the crane in the non-working state, the designed basic wind pressure should reach 1000N/m² to cope with potential risks under extreme weather conditions.
Temperature: Taking into account the climate differences in different regions, the crane has the ability to adapt to the working environment around zero degrees. This means that whether in the cold northern region or other areas with suitable temperature, the crane can operate stably and meet various operating needs.
Other key requirements
Electrical components: The electrical components of the crane should strictly follow the relevant national standards and have corresponding authoritative certification. This ensures the safety and reliability of the electrical system and reduces the safety hazards caused by electrical failures.
Working noise: To ensure the comfort of operators and the surrounding environment, the noise level of the equipment during operation should be strictly controlled and not more than 75dB. This helps to reduce noise pollution and protect the hearing health of operators.
Unit of measurement: The measurement units of all instruments and meters of the crane should be uniformly based on the international system of units, which will help improve the accuracy and comparability of measurements and facilitate international exchanges and cooperation.
Safety protection and environmental protection requirements: The safety protection, environmental protection, fire protection and other aspects of the crane must strictly comply with relevant national standards. This includes setting up complete safety protection devices, taking environmental protection measures to reduce emissions, and equipping effective fire-fighting equipment to ensure the safety, environmental protection and efficient operation of the crane.
This technical specification provides detailed technical parameters and strict requirements for the design and manufacture of customized 450t gantry cranes. In the actual production and use process, all parties should strictly follow the requirements of this specification to ensure that all aspects of the crane design, manufacture, installation, commissioning and operation meet the standards, so as to achieve safe, reliable and efficient operation of the crane and meet various operational needs.
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