shipbuilding gantry crane types, parameters and supplier selection analysis
Shipbuilding gantry cranes are the core lifting equipment for ship construction, shipyard operation and maintenance, and marine engineering construction, and almost all heavy lifting processes rely on such equipment to complete. Unlike ordinary industrial gantry cranes, marine lifting equipment has been operating in the coastal open air environment for a long time, with greater load bearing, wider operating span, and the complexity of the working conditions far exceeds that of the conventional factory scene.
Many shipyards in the procurement of marine gantry cranes, it is easy to fall into the misunderstanding of only comparing the offer. Low-priced equipment often exists in the structure of the material shrinkage, insufficient protection of the marine environment, lifting accuracy does not meet the standards and other issues, put into use will be frequent failures, direct delays in the construction of the ship construction period, increasing the overall construction costs.
Shipbuilding gantry crane suppliers that are truly suitable for shipyard projects are not only able to provide compliant lifting equipment, but also familiar with large-span steel structure design, heavy-duty synchronous lifting process, coastal salt spray corrosion treatment, as well as mature on-site installation and commissioning and long-term after-sales support capabilities.
The main application scenarios of shipbuilding gantry cranes
Shipbuilding gantry cranes are designed around the shipyard's open-air, heavy-duty, wide-ranging operations to build, covering the entire process of ship construction, maintenance, offshore prefabrication, is the core equipment indispensable to port shipyards, offshore engineering bases.
Hull Segment Assembly Operation
Modern ship construction adopts the construction mode of segment prefabrication and overall closing, and large hull segments are extremely heavy and bulky, and the requirements for lifting and positioning accuracy are harsh.
Professional shipbuilding gantry cranes can smoothly complete the lifting, shifting and accurate docking of huge hull segments to ensure the construction accuracy of the hull together, which is the core equipment for the construction of the main body of the ship.
Shipyard steel structure material transfer
In the process of ship production, a large number of ship plates, steel sections, prefabricated modules and all kinds of hull supporting components are required. These materials are stacked in scattered, different tonnage, need to be adapted to the heavy-duty lifting equipment to complete the field of normalized transfer.
Reliable shipyard gantry crane manufacturers will optimize the operating parameters of the equipment according to the material specifications, to adapt to high-frequency, multi-category steel lifting operations, to adapt to the daily production rhythm of the shipyard.
Construction Scene of Shipyard and Ship Platform
Dry dock and open platform are the core sites for ship construction, launching and overhauling, and the operation area is open and has a great span. Shipbuilding gantry cranes can fully cover the operation area of the dock, supporting the construction of the entire ship, heavy parts transfer, ship molding supporting operations.
This type of scenario requires high requirements for equipment stability, wind resistance and continuous operation performance, and ordinary civilian gantry cranes are unable to meet the construction standards.
Nacelle heavy equipment installation
Ship main engine, generator sets, large piping equipment and other nacelle core parts, high deadweight, large volume, and installation position precision, the smoothness of lifting and alignment accuracy has high requirements.
Exclusive offshore gantry cranes can realize low-speed and smooth lifting, accurate positioning, avoiding problems such as equipment bumping and installation deviation, and guaranteeing the quality of nacelle equipment installation.
Ship Repair and Remodeling Engineering
Regular overhaul, structural modification, and replacement of spare parts after the ship is in service also require heavy-duty gantry cranes to cooperate with the construction. Maintenance scenarios have flexible operating points and variable lifting conditions, which require higher adaptability of the equipment.
Gantry cranes suitable for shipyards can be flexibly adapted to dismantling, shifting, lifting and other types of maintenance processes to meet the needs of the ship's entire life cycle of operation and maintenance construction.
Offshore Engineering Prefabrication
In addition to conventional ship construction, prefabrication sites for offshore platforms, pipe rack modules, marine steel structures and other offshore products will also use shipbuilding gantry cranes in bulk.
These offshore components have large tonnage and special structure, which requires heavy-duty shipyard Cranes to provide stable heavy-duty lifting capacity to suit the production and construction needs of large-scale offshore projects.
Shipbuilding projects on the core requirements of lifting equipment
Shipyard lifting equipment selection criteria, and ordinary industrial plants have essential differences. Coastal harsh environment, oversized heavy load, high precision construction requirements, constitute the exclusive selection of shipbuilding Crane threshold.
Strong heavy-duty lifting capacity
Most of the hull segments, steel structure modules and cabin equipment lifted in shipyards belong to super-heavy loads, and many of the components have irregular shapes and shifted centers of gravity.
This requires that the core structure of shipbuilding gantry cranes, such as the main beam, outriggers, traveling mechanism, etc., have sufficient load-bearing redundancy to withstand irregular heavy load operations for a long period of time without structural deformation, operational shaking and other problems.
Large span and sufficient lifting height
The operating width of shipyard and ship platform is generally much wider than that of ordinary factory buildings, and the vertical space for the construction of ship hull is also higher. The equipment must have the ability to cover a large span in order to completely cover the whole construction area without any blind spot.
At the same time, the sufficient lifting height can meet the needs of high-level hull assembly and high level installation of large-scale equipment, and there will be no shortage of lifting space.
Smooth and synchronized lifting performance
Large hull segments and offshore modules cannot be lifted at a single point, but require multiple lifting points to work together. If the lifting and running speeds of each lifting point are not consistent, it will lead to uneven force on the components and problems of twisting and offsetting.
High-quality shipbuilding gantry cranes are equipped with synchronized control systems, which can achieve smooth lifting and precise alignment of multiple points to protect the structural integrity and construction accuracy of large components.
Suitable for harsh outdoor working conditions along the coast
The vast majority of shipyards are built near the sea, and the equipment is exposed to strong winds, rainfall, high humidity, and high salt spray environment all year round. Salt spray corrosion, wind attack is the main source of loss of marine Crane.
Qualified marine cranes must do special anti-corrosion coating, electrical moisture sealing, wind reinforcement treatment, able to withstand the harsh coastal climate for a long time, slow down the aging of the equipment, reduce the frequency of failure.
High safety factor and structural reliability
Shipyard heavy lifting is a high-risk operation, once the equipment brake failure, structural failure, will cause huge property losses and safety accidents.
Regular shipbuilding Crane manufacturers will equip the equipment with multiple safety protection configurations, including reliable braking system, limit protection, collision avoidance devices, with high-strength overall structure, all-round protection of construction safety.
Long-term operation and maintenance and spare parts supply guarantee
Shipbuilding gantry cranes belong to large-scale special equipment, the service life of up to more than ten years, the late loss of spare parts, equipment maintenance is the norm.
Once the equipment is down, it will directly lead to the entire ship construction process stagnation, delaying the schedule. Therefore, the manufacturer's after-sales response speed, long-term spare parts supply capacity, on-site operation and maintenance support is the key to long-term stable operation of the project.
Mainstream shipbuilding gantry crane models suitable for shipyard projects
Different shipyards have different construction scales, operation scenarios and load standards, and a single model cannot be adapted to all working conditions. Combined with the shipyard projects at home and abroad, the following types of cranes are the mainstream choice for shipbuilding and offshore projects.
Double Girder Gantry Crane
Double girder gantry cranes are the most widely used models in shipyards, and the double girder structure significantly improves the equipment's load carrying capacity and structural stability.
It is suitable for large-tonnage heavy-duty lifting and large-span operation areas, and can meet the core processes such as hull segment closing and heavy steel structure transfer, and is suitable for the regular construction needs of most large and medium-sized shipyards.
Shipbuilding Gantry Crane with Winch Trolley System
These specialized shipbuilding gantry crane are equipped with customized winch and travelling trolley systems for stronger lifting traction and smoother operation.
They are highly adaptable to the lifting of large hull blocks, long-distance transfer of super-heavy modules, and large-span dockyard operation scenarios, and are the core models for large shipyards and offshore engineering bases.
Semi-portal Crane
Part of the shipyard edge of the work area, semi-open construction sites, one side with plant walls or fixed support structures, without the need for bilateral outrigger layout.
Semi-portal Crane can be built based on the existing building structure, reduce infrastructure investment, space adaptability is very strong, suitable for shipyard edge area, auxiliary construction area of lightweight heavy-duty operations.
Rail-mounted Gantry Crane
In large-scale standardized shipyards, the layout of the dock and operation area is regular, and the construction line is fixed. Cranes run along a fixed track, with precise alignment and stable running order.
Long-term deviation of the equipment is small, low failure rate, suitable for high-frequency, process-oriented shipbuilding operations, suitable for large-scale mass-production shipyards.
Customized Shipyard Gantry Crane
For special offshore projects and large-scale ship construction projects, the standard model cannot meet the special needs of synchronous lifting, multiple lifting point operation, variable speed control, etc.
Professional and reliable shipyard gantry crane suppliers can customize multi-hook layout, synchronous lifting system, variable speed control system and exclusive anti-corrosion solutions according to the working conditions, which can fully match the niche, heavy-duty and specialized shipbuilding construction scenarios.
Procurement must confirm the core technical parameters one by one
A lot of shipyard equipment adaptation problems stem from the procurement stage of parameter checking is not meticulous. The parameters of shipbuilding Crane is not a simple tonnage matching, but a combination of site, working conditions, the environment of the full range of adaptation, each parameter affects the use of equipment.
Rated lifting capacity
Equipment tonnage selection can not only refer to the weight of conventional components, you need to account for the hull segments, the maximum deadweight of heavy equipment, while superimposed on the self-weight of the spreader and the operating dynamic load factor.
We must reserve sufficient load-bearing safety margin to prevent the equipment from long-term full-load and overload operation, and avoid structural fatigue and safety hazards from the source.
Equipment span
The span directly determines the operating width of the equipment, which needs to accurately match the width of the dock, the layout of the assembly area and the spacing of the construction channel.
If the span is too small, there will be a large number of blind zones, unable to cover the hull construction area; if the span is too large, it will cause a waste of equipment performance and affect the overall stability of the fuselage.
Lifting height
The lifting height should be determined by combining the hull construction height, large equipment installation position and site headroom size.
It should be ensured that the heavy load can smoothly cross the construction obstacles after lifting, to meet the space requirements of high-level assembly and high-level equipment installation, and to avoid collision of lifting and restricted operation.
Running length
The running length determines the coverage of the Crane traveling along the track, which is directly related to the operational coverage of the whole shipyard and yard.
It needs to be planned according to the overall construction line of the shipyard, component stacking area, and segment assembly points to ensure that there is no lifting dead space in the whole yard, and there is no need for manual secondary transfer.
Working level
The working level is the core index that distinguishes the equipment's ability to adapt to heavy loads. Shipyard operation is high-frequency, heavy-duty, and year-round continuous construction, which necessitates the selection of medium-heavy and heavy-duty working class equipment.
Light and medium standard models are completely unable to adapt to shipbuilding conditions, and short-term use will result in structural wear and tear, aging of accessories, and frequent failures.
Number of hooks and lifting points
Conventional auxiliary work can use the main and auxiliary hooks to meet the needs of basic lifting. Large hull segments and shaped offshore modules require synchronized and coordinated lifting of multiple lifting points.
When purchasing, it is necessary to determine the number of hooks and synchronization control mode according to the lifting process of the largest components, so as to ensure the even force and accurate alignment of lifting.
Operation speed
The speed ratio of hoisting, traveling of trolley and traveling of the whole machine needs to be adapted to the safety standard of shipbuilding construction. The high-precision assembly process is suitable for low-speed smooth operation, and the material transfer process can be appropriately accelerated.
Reasonable speed matching can not only guarantee the construction safety and assembly precision, but also match the overall construction rhythm.
Outdoor environment protection configuration
Coastal shipyards must focus on verifying the equipment's wind resistance level, anticorrosion coating process, electronic control of moisture and dust level.
High-quality marine Crane will use multi-layer anticorrosion spraying, sealed electronic control box, high temperature and salt spray resistant cables, specially adapted to the seaside strong winds, high corrosion, high humidity and harsh environments.
Power supply standard
Different countries and regions have different voltage and frequency standards, you need to verify the power supply parameters of the shipyard in advance.
Manufacturers will match the motor and electronic control configuration according to the local power system to avoid mismatch in power supply, resulting in equipment failure to start, circuit burnout, abnormal operation and other problems.
Inspection of a full set of compliant technical data
Overseas shipyards and large-scale offshore projects have very high requirements for technical data compliance, and complete data is needed to support customs clearance, acceptance, filing, operation and maintenance.
Regular manufacturers can provide equipment assembly drawings, technical parameter lists, structural stress calculations, wheel load data, electrical schematics, a full set of parts lists and factory inspection reports, which can meet the global project acceptance standards.
Confirmation of core parts brand and configuration
The operational stability and service life of Crane depends entirely on the quality of core accessories. Focus on verifying the brand and configuration standard of motor, reducer, brake, electronic control system, wire rope, hook, traveling wheel, control system.
Reliable manufacturers uniformly choose industry famous brand parts, put an end to refurbished parts, low parts, from the source to reduce the probability of equipment failure, to ensure long-term stable operation.
Verification of factory quality inspection and testing process
Shipbuilding gantry cranes belong to heavy special equipment, factory quality inspection process is critical.
Regular manufacturers will strictly implement the weld nondestructive testing, structural size calibration, no-load test run, full-load load test, safety function debugging.
Each piece of equipment before leaving the factory will complete the whole process of testing, retain a complete record of testing to ensure that the equipment can be stabilized and put into operation, no quality hazards.
Clearly define the scope of installation and commissioning services
The installation of large-scale marine gantry cranes requires high precision, and the quality of installation directly affects the operational stability and service life of the equipment. The service mode of different manufacturers varies greatly, divided into pure equipment supply, on-site technical guidance, all-inclusive installation and commissioning of three modes.
Procurement stage needs to be clear in advance the content of the service, to confirm whether it includes on-site commissioning, technical docking, acceptance assistance and other services, to avoid the arrival of no one docking construction.
Verify warranty and long-term spare parts support
Shipyard equipment downtime loss is great, fast after-sales response and spare parts supply is just needed. High-quality manufacturers have a clear warranty system, global after-sales docking channels and standing spare parts inventory.
They can provide lifelong technical consulting, quick troubleshooting, and quick replacement of spare parts to minimize equipment downtime.
Comprehensive assessment of the overall value of the project
Low-priced offers generally have hidden shrinkage problems, such as thinning of main beam plates, downgrading of core accessories, deletion of protective configurations, and reduction of working level.
Procurement selection needs to synthesize the equipment structure and technology, configuration standards, quality inspection system, service capabilities, service life, assess the value of the full cycle of use, not just compare the price of a single purchase.
Shipyard procurement of gantry cranes common misconceptions
Most of the late failure of equipment, poor adaptability, schedule delays, all stem from the procurement phase of the decision-making omissions. These common misconceptions may seem subtle, but will affect the use of equipment for more than ten years.
The most common procurement problem is to screen suppliers based on price alone. Shipbuilding special equipment, materials, processes, protection, quality control costs are fixed, low prices will inevitably be accompanied by configuration shrinkage, can not be adapted to shipyards heavy corrosive conditions.
Copying the general model parameters, not combined with the shipyard construction line, dock layout customization and transformation, will lead to more blind spots in the operation of the equipment, operational interference, poor adaptability, and can not be adapted to the actual production process.
Neglecting the coastal strong wind, salt spray corrosion, high humidity and other environmental factors, omitting the special anticorrosion, wind, moisture-proof configuration, the equipment will quickly rust and aging, the frequency of failures increases year by year.
Neglect the process requirements of synchronized lifting, the choice of ordinary single-point lifting equipment, lifting of large components is prone to uneven stress, offset deformation, there is a great construction risk.
Do not verify the manufacturers of shipyard project cases, gullible general lifting equipment can be adapted to shipbuilding conditions, resulting in equipment can not meet the heavy-duty, large-span, high-precision construction needs.
Not clear the scope of the offer, the late appearance of transportation, installation, commissioning, information, accessories and other invisible charges, the overall procurement costs far exceeded expectations.
Fuzzy installation, commissioning, after-sales rights and responsibilities, equipment failure after multiple shirking, unable to repair in time, resulting in delays in the work schedule.
The site dimensions, working load, environmental conditions provided at the inquiry stage are incomplete, and the manufacturer's customized program is inconsistent with the site, requiring repeated rectification and rework.
Frequently Asked Questions
What is the difference between ordinary gantry cranes and shipbuilding gantry cranes?
Ordinary gantry cranes are suitable for inland general factories, with mild working conditions, stable load and no strong corrosion risk. Shipbuilding gantry cranes are specially designed for shipyards with large spans, heavy loads, coastal corrosion, multi-point simultaneous lifting and other special working conditions, with higher structural strength, stronger protection level and better control accuracy, so the two can't be used in place of each other.
What scenarios in shipyards are suitable for the selection of double girder gantry cranes?
Large and medium-sized shipyards are suitable for double girder gantry cranes for the closing of hull segments, transfer of heavy steel structures, and normalized heavy-duty operations in shipyards. Its carrying capacity and stability can meet the high-frequency, large-tonnage, large-span shipbuilding core processes.
Why is synchronized lifting vital in shipbuilding projects?
The center of gravity of large hull segments and offshore modules is scattered and the structure is fragile. Single-point force or uneven lifting speed will cause distortion, cracking, and alignment deviation of the components. Synchronized lifting can ensure that the force at each lifting point is uniform, lifting and lowering are synchronized to protect the integrity of the components and safeguard the construction accuracy.
Procurement of shipbuilding gantry cranes, in addition to price, but also focus on what to verify?
Focus on verifying the working level of the equipment, anticorrosion protection configuration, core parts brand, structural welding process, factory quality inspection reports, manufacturers of shipyard project cases, the integrity of the technical data, installation and commissioning services and long-term after-sales service.
What technical information do I need to request from the manufacturer before placing an order?
Manufacturers can be asked to provide equipment assembly drawings, detailed technical parameter tables, structural stress calculations, wheel pressure load data, electrical schematic diagrams, parts list, factory quality inspection reports and English operation manuals to meet the needs of global project acceptance and operation and maintenance.
How important is after-sales service to shipyard gantry cranes?
Shipyard lifting equipment is the core equipment of the production line, once the shutdown will lead to the stagnation of the entire ship construction process, resulting in a huge loss of time. Perfect after-sales response, spare parts supply, troubleshooting service is the key to ensure the continued construction of the project.
Can a supplier provide a full scene of shipbuilding and ship repair Crane program?
Professional entities can provide one-stop construction, maintenance, offshore prefabrication of a full range of gantry cranes, according to the construction of heavy-duty working conditions, maintenance of flexible working conditions to match the different models and configurations, unified equipment quality and after-sales system, to match the full range of scenarios in the shipyard operational needs.
Summarize
The core of selecting a reliable supplier of shipbuilding gantry cranes is not to find the lowest price, but to find a partner that is suitable for their own shipyard conditions, construction techniques and long-term development. The specificity of shipbuilding determines that the suitability, stability and service ability of lifting equipment is far more important than the price of a single purchase.
From model selection, parameter checking, manufacturer strength verification, to installation and commissioning, warranty and operation and maintenance, each link has a direct impact on the service life of the equipment and project construction efficiency. High-quality manufacturers not only provide standardized equipment, but also provide customized engineering solutions, a full set of compliance information and full-cycle after-sales support.
Henan Mine Crane, as a professional manufacturer of shipbuilding gantry cranes, is deeply engaged in global shipyards and offshore engineering lifting support field, with a wealth of overseas project landing experience. We can customize exclusive gantry crane solutions for different shipyard conditions and offshore engineering scenarios, and provide a full set of technical data, on-site installation guidance and lifelong operation and maintenance services.
If your shipyard or offshore project needs to match the exclusive lifting equipment, you can provide the equipment lifting capacity, span, lifting height, running length, dock layout and site conditions, our engineering team will customize the optimal solution for you.
