Rail-Mounted Double Girder Gantry Crane
Rail-Mounted Gantry Cranes (RMGs) are commonly used in container yards and intermodal terminals. These cranes run on rails, which provide stability and allow for high precision in container handling. They are designed to transport containers over large areas and are often used for stacking containers in yard operations.
The RMG is capable of lifting international standard containers (20′, 40′, and 45′) with ease, thanks to its specially designed container spreader.
(1) Features
RMG container cranes are fixed on rails and are mainly used for stacking and moving containers in large container terminals. These cranes have the following advantages:
High Precision: They move along fixed paths, allowing for greater accuracy in container handling.
Efficient Use of Space: RMG container gantry cranes can be used in tightly packed yards as they do not require space for maneuvering.
Environmental Impact: Since they are electrically powered, RMG cranes produce fewer emissions compared to diesel-powered equipment, making them an environmentally friendly option.
(2) Making an Informed Purchase Decision
Before making a purchase decision, it is crucial to have a clear understanding of your workload, lift height, and other specific operational needs. Determine which type of container gantry crane you need: a rail mounted gantry crane(RMG) or a rubber tired gantry crane(RTG). Both types are commonly used in container yards and share similar functionalities, yet they differ in technical specifications, efficiency in loading and unloading, operational performance, economic factors, and automation capabilities.
RMG cranes are mounted on fixed rails, providing greater stability and higher loading and unloading efficiency, making them suitable for large terminal operations that require heavy lifting capacities. Although RMG cranes require a more substantial infrastructure investment, they often lead to lower long-term operational costs due to increased productivity and reduced maintenance needs.
On the other hand, RTG cranes are unmatched in terms of maneuverability and flexibility. They are ideal for ports and container yards with limited space.
Selecting the right type of container crane is vital for enhancing the efficiency and safety of your container handling operations. With years of professional expertise, Shanghai Hexin is equipped with a team of specialists dedicated to helping you select the most suitable lifting solution tailored to your objectives. choosing the right crane, lifting mechanisms, and components is vital. This ensures optimal operational efficiency while helping you manage costs effectively, keeping them within your budget.
If you're considering investing in a new rail-mounted container gantry crane system and require a detailed quote, or if you're seeking expert advice on the optimal lifting solution for your specific operations, don't hesitate to contact us. Our dedicated team is always on standby, ready to understand your requirements and provide tailored solutions that perfectly meet your needs.
Technical Parameter
| Technical Parameter of RMG Rail Mounted Container Gantry Crane |
| Capacity |
t |
30 |
35 |
40.5 |
45 |
50 |
| Span |
m |
15-35 |
| Lifting height |
m |
up to 25 |
| Container |
|
20' 40' |
20' 40' 45' |
20' 40' 45' |
20' 40' 45' |
20' 40' 45' |
| Work duty |
|
A6~A8 |
A6~A8 |
A6~A8 |
A6~A8 |
A6~A8 |
Understanding the Structure of a Container Gantry Crane
The structure of a container terminal gantry crane is a complex and robust system, designed to handle the demanding tasks of container transport in shipping terminals and inter-modal yards. Understanding the container gantry crane structure helps the crane users and operators optimize crane performance, reduce downtime, and maintain safe, productive operations.
Gantry Structure (Main Beams and Legs)
The gantry structure forms the framework of the crane, providing the strength and stability required to lift and move heavy containers. The main components of the gantry structure include:
Main Beams (Girders): These horizontal beams span the width of the crane and support the weight of the trolley, hoisting system, and the container being lifted. The main beams are designed to withstand significant loads, often constructed from high-strength steel.
Legs (Columns): The legs support the main beams and connect them to the ground or rail system. In a rail-mounted gantry container crane, these legs run on tracks along the length of the crane's working area. For a rubber-tired gantry container crane, the legs are equipped with rubber tires, enabling mobility within the container yard.
Trolley and Hoisting Mechanism
The trolley is a mobile platform that runs along the length of the main beams. It houses the hoisting mechanism, which is responsible for lifting and lowering containers. The hoisting mechanism includes a system of ropes, pulleys, and a motor-driven hoist drum that enables the lifting operation.
Hoist Drum and Ropes: The hoist drum winds and unwinds the steel ropes that are attached to the spreader, controlling the vertical movement of the container. High-tensile ropes are used to ensure the safety and durability of the hoisting system.
Trolley Motor: The trolley is powered by motors that allow it to move horizontally along the crane's main beams, positioning the hoist directly above the container being lifted or placed.
Spreader
The spreader is the device attached to the hoist ropes that grips and locks onto the container. It is designed with twistlocks at each corner that engage with the corner castings of the container. Depending on the container size and type, different types of spreaders are used, including:
Fixed spreaders are designed to lift containers of a specific size, typically either 20-foot or 40-foot containers.
Telescopic spreaders provide greater flexibility by adjusting their length to fit different container sizes, accommodating both 20-foot and 40-foot containers, and sometimes even 45-foot containers.
Rotating spreaders enable the rotation of containers during lifting, which is useful in situations where the container needs to be oriented in a specific direction for storage, loading onto transport vehicles, or placement within a tight space.
Crane Cabin and Control System
The crane cabin houses the operator and provides a clear view of the crane's working area, enabling precise control during container handling. The cabin is equipped with various controls and displays for managing the crane's movement, hoisting, and spreader operations.
Joystick Controls and Displays: The operator uses joysticks and other control devices to move the crane, operate the trolley, and lift or lower containers. Information about crane status, load weight, and other metrics are displayed on screens inside the cabin.
Travel Mechanism (Rail-Mounted or Rubber-Tired)
The travel mechanism allows the crane to move along the length of the container yard or terminal. Depending on the type of crane, the travel mechanism can be:
Rail-Mounted: These cranes move on rails embedded in the ground. RMG intermodal gantry cranes are often used in fixed container terminals with predefined container lanes. The movement is powered by electric motors that drive the wheels along the rails.
Rubber-Tired: RTG container cranes are equipped with rubber tires, allowing them to move freely across container yards without the need for rails. RTG cranes offer flexibility, as they can be driven to different areas of the terminal.
Power Supply System
Container handling gantry cranes require significant power to operate their hoisting, trolley, and travel mechanisms. The power supply system can be electric or diesel-driven, depending on the type of crane:
Electric-Powered Cranes:Rail-mounted gantry cranes typically use electric power supplied through cables or conductors, which is cleaner and more efficient.
Diesel-Powered Cranes:Rubber-tired gantry cranes often use diesel engines to generate power for their operations. Some RTG cranes use hybrid systems that combine diesel with electric power to reduce emissions and fuel consumption.
Safety Devices: To ensure the seamless operation of the crane and to prevent potential personal injuries or mechanical failures, our safety apparatus
goes beyond basic electric protective devices or alarm bells. It includes a comprehensive range of essential equipment, as detailed below:
1. Overload Limit Switch
2. Rubber Buffers
3. Electric Protective Devices
4. Emergency Stop System
5. Voltage Lower Protection Function
6. Current Overload Protection System
7. Rail Anchoring
8. Lifting Height Limit Device
Of course, we also offer a customized service.To provide you with the most accurate and tailored design solution, please share the following details:
1.Lifting Capacity:
Please specify the maximum weight your crane needs to lift. This critical information enables us to design a system that can handle your loads safely and efficiently.
2.Span Length (Rail Center to Rail Center):
Provide the distance between the centers of the rails. This measurement directly impacts the overall structure and stability of the crane we'll design for you.
3.Lifting Height (Hook Center to Ground):
Indicate how high the hook needs to reach from the ground level. This helps determine the appropriate mast or girder height for your lifting operations.
4. Rail Installation:
Have you already installed the rails?If not, would you like us to supply them?Additionally, please specify the required rail length. This information helps us plan the complete setup for your crane system.
5. Power Supply:
Specify the voltage of your power source.Different voltage requirements affect the electrical components and wiring design of the crane.
6. Working Conditions:
Describe the types of materials you'll be lifting and the ambient temperature. These factors influence the choice of materials, coatings, and mechanical properties for the crane to ensure its durability and optimal performance.
7. Workshop Drawing/Photo:
If possible, sharing a drawing or photo of your workshop would be highly beneficial. This visual information helps our team better understand your space, layout, and any potential obstacles, allowing us to tailor the crane design more precisely to your site.
Founded in 2007, our company's entrepreneurial journey began in the lifting machinery industry. As the business expanded, we established a modern manufacturing facility to meet growing demand. In 2024, we launched the brand Hexin Crane and set up our office in Shanghai. Our mission remains clear: Helping to Lift World.
At Hexin Crane, we specialize in the design and production of both standardized and customized lifting machinery. With extensive expertise, particularly in overhead cranes and gantry cranes, we provide tailored solutions to meet the specific needs and operational requirements of our clients. No material or design challenge is too complex for us-our team is committed to delivering innovative solutions that ensure maximum efficiency and safety.
Our products are exported to over 20 countries worldwide, serving a diverse range of customers, including end-user factories, distributors, and industry peers. In addition to complete crane systems, we supply crane components and OEM services to clients abroad.
With a strong international presence, it's likely we already offer our products and services in your region. Feel free to reach out-we look forward to helping you with your lifting needs.
Our quality and reputation attracts many customers
Q1: Are you a manufacturer or a trading company?
We are an integrated production and trading enterprise, with our own independent R&D team, manufacturing facility, and professional marketing department. This integrated structure allows us to offer comprehensive solutions and maintain a competitive edge in the market.
Q2: Are customization options available?
Absolutely. We understand that each customer's needs are unique. That's why we offer full customization on all our products to suit your specific operational requirements. To ensure we provide the best solution, we encourage you to provide detailed information about your needs. Our expert team will then design the most optimal solution, tailored to meet your exact specifications, while minimizing costs and maximizing efficiency.
Q3: How long is your warranty coverage?
We offer a 2-year warranty on the crane itself and an 18-month warranty on electric components. Should any issues arise, our dedicated after-sales team and professional engineers will promptly assist in troubleshooting and resolving the issue. Support is available via email or video conference for efficient diagnosis. If the issue is found to be related to quality, we will swiftly send any necessary replacement parts via air freight to minimize downtime and ensure a quick resolution.
Q4: Do you provide overseas installation services by engineers?
While we typically provide a detailed instruction manual for self-installation, we also offer the option of overseas installation services in specific cases. Our products are carefully packaged and designed for easy installation, which helps reduce costs and streamline the setup process. If necessary, we can arrange for our engineers to assist with installation at your location.
Q5: What other types of products do you offer?
We offer a broad range of lifting solutions, including but not limited to overhead bridge cranes, gantry cranes, jib cranes, monorail cranes, workstation cranes, and various other construction lifting machinery. Our sales specialists are always available to help you choose the most suitable equipment for your specific needs.
Q6: If we have an urgent need, can you arrange prompt delivery?
Yes, we understand the urgency of your requirements. Once your order parameters are confirmed, we prioritize urgent orders and work diligently to expedite the production and shipping process. Our efficient production systems and logistics network ensure that you receive your products quickly and reliably, without compromising on quality.
Q7: I have limited headroom in my workshops.
Is it possible to install a crane in that space? Definitely. We offer specialized crane solutions designed for workshops with low headroom. Our experienced engineers will work with you to create a customized design that fits your space perfectly, ensuring both optimal performance and space efficiency.
Q8: Do you supply lifting and rigging tools?
Yes, we provide a full range of lifting and rigging tools, including hooks, electromagnetic devices, grab buckets, and more. Please consult with our sales team to discuss the specific tools and accessories that best suit your needs.
Q9: Do you accept OEM/ODM business?
Certainly. We have extensive experience in OEM/ODM manufacturing and have collaborated with leading crane brands and customers worldwide. Whether you need customized products or full OEM solutions, we are equipped to meet your specifications.
Q10. What payment methods do you accept?
We accept T/T, bank transfers, L/C, PayPal, and other major payment platforms.
){kind=link}