Rail Mounted Container Gantry Crane / Weihua Crane

Rail mounted container gantry crane (RMG crane) is mainly used to load, unload, move and stack containers in railway transship fields and large container storage yards. It is constituted by main girder, rigid and flexible outriggers, trolley travel mechanism, lifting mechanism, crane travel mechanism, electric system and operation cab.

This rail mounted container gantry crane can be 3 kinds based on operating type in storage yards: whose girders outreach at the direction of the single outrigger is called single cantilever crane and at the direction of the double outrigger is called double cantilever crane, and whose girders do not outreach is called non-cantilever crane. Users can choose different types depending on the different demands of yards, storage and transport ways of containers and vehicles (trucks or railway vehicles). 

Rail mounted container gantry crane

Features of Rail Mounted Container Gantry Crane:

1. Low lifting speed because of low lifting height. High crane traveling speed fits the requirement of the long-track containers storage yards' productivity. The spreader would go over the fourth/fifth container layer when the stack of containers is three/four layer and its lifting height depends on the requirements of storage yards 

2. The trolley traveling speed depends on the span and the outreaching distance of both sides of the bridge. In the case of the span and outreaching distance is short, smaller trolley traveling speed and the productivity is advisable; otherwise, the trolley traveling speed could be accordingly increased to meet productivity requirement.

3. When the span is over 40 meters, the crane mechanism travels in a high speed, and both sides of outriggers would deviate because of the drag on each side is different. So there is a stabilizer equipped on this crane and electric system would keep both sides of traveling mechanisms synchronous.

4. Electrical drive-control system adopts thyristor speed regulating drive AC or DC control system to meet the higher need and accomplish a better performance of speed regulating and control. Or it adopts conventional AC eddy current speed regulating control system and AC stator voltage and speed regulating drive control system.

An electric braking that equipped with thyristor speed regulating drive AC or DC control system or AC stator voltage and speed regulating drive control system is usually used as the electric control system of a high speed crane traveling mechanism. Conventional AC eddy current speed regulating drive control system which depends on the brakes to shut down traveling mechanisms should be avoided in order to prevent the huge impact to whole crane. 

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Email: weihua@craneweihua.com

Grab Dredgers / Weihua Crane

Grab dredgers are used for dredging work in waterways, harbor pools and underwater infrastructure works. It is suitable for dredging mining mud, gravel, pebbles and cohesive soil, but not suitable for dredging fine sand.

Grab dredgers

Cross Digging:

The grab dredger is suitable for the cross digging. 5 anchor cables shall be arranged and length of the main anchor cable and tail anchor cable shall be 200m to 300m. Edge anchor cable should be set aside about 100m.

Downstream-Countercurrent Digging:

It prefers downstream digging compared with countercurrent digging. Countercurrent digging also can be adopted in case of low water flow rate or reciprocating water flows.

Grab volume: 18m3

Dredging depth: 50m in water, 10m above water

Grab dredger arm length: 30m

Working radius: 15-23.5m

Features of Grab Dredgers:

1. Visual Simulation;

2. Underwater visualization work;

3. GPS positioning, precise dredging control;

4. Consistent excavation depth;

5. Flat dig control to ensure the accuracy of 15cm flat dig.

http://www.weihuacraneglobal.com/product/Grab-Dredgers.html
Email: weihua@craneweihua.com

Boat and Yacht Handling Crane / Weihua Crane

Yacht handling cranes, also known as boat handlers. It is widely used in water sports games, yacht clubs, navigation, shipping and learning, etc. It can transport different tonnage (32 tons - 1000 tons) of boats or yachts from the shore dock for on-shore maintenance, repair or launching of new vessels.

The boat and yacht handling crane includes the following items: main structure, traveling wheel block, hoisting mechanism, steering mechanism, hydraulic transmission system and electric control system. The main structure is N type, which can transfer the boat/yacht with height surpass crane's height.

Yacht handling cranes

According to different requirements of our customers, the boat handling crane can handle different tonnage boats or yachts (10T-800T) from the shore side, it can be used for the maintenance on the shore side or can put the new boat into the water. This yacht handling crane has soft and firm belt to lift the boat and yacht so that it will never hurt the surface. This crane also can put the boat in sequence quickly with small gap between each two boat.

Features of Yacht Handling Crane:

1. For the crane traveling, this crane can move in diagonal direction, this boat and yacht handling crane also can steer in 90 degree and put the boat in any designated position according to requirements.

2. This crane can be adjusted the width of the main girder according to the boat in case to handling different side boat.

3. This yacht handling crane is of low expense, high performance, easy to operate and maintenance and so on.

4. Low cost on the daily operation, it adopts the soft and firm belt to ensure there is no harm to the boat when hoisting.

5. This boat crane can make the boat in order quickly; it also can adjust the gap between each boat according to different condition.

http://www.weihuacraneglobal.com/product/Boat-and-Yacht-Handling-Crane.html
Email: weihua@craneweihua.com

Rubber Tyred Container Gantry Crane / Weihua Crane

Rubber tire container gantry crane is employed to handle containers, boats/yacht, large component at the loading/unloading places and container yard. This rubber tyred crane is fitted with multiple hooking point's spreaders to meet the needs of different lifting situations. The whole crane can carry out 360° steering with flexible movement.

Rubber tire container gantry crane

Full hydraulic drive for crane traveling mechanism and lifting mechanism with Step less speed change. The long traveling use hydraulic closed circuit with good transmission efficiency, less fault. There are safety indicator and overlord limiter to ensure safety of operators and products. All operation are controlled by CAN-BUS control.

Features of Rubber Tyred Container Gantry Crane:

1. Rubber tyred container gantry crane is usually called RTG for short, which is employed to stack containers in container storage yards. Rubber tyred container ganry crane is flexibly moved by its own rubber tires for transshipping containers.

2. Weihua rubber tyred container gantry crane is equipped with specialized spreaders to lift standard-sized 20GP, 40GP, 45HQ containers and hydraulic storage tanks.

3. The trolley and crane traveling mechanisms equip three-in-one reducer with convenient maintenance.

4.  The tires of this container gantry crane can rotate 90°and move obliquely at 20° and 45°.

Full Set Rubber Tyre Gantry Crane Fixed at the Cargo Ship Deck

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Email: weihua@craneweihua.com

2 Gantry Cranes Lifting Crane Girder Synchronously

The video shows 2 single girder gantry cranes (Email: weihua@craneweihua.com) are working together handling a crane beam/girder synchronously in Weihua Crane factory. Weihua gantry cranes can be used for multiple cranes (2-4 crans) linkage operation.

http://www.weihuagantrycrane.com/product/RMG-Crane-for-Steel-Track-Handling.html

Warehouse E.O.T Crane

This is a single girder E. O. T crane (Email: weihua@craneweihua.com) in reducer warehouse. It is equipped with electric hoist.

http://www.weihuacraneglobal.com/product/Chinese-Standard-Single-Girder-Overhead-Crane.html

Container Rail Mounted Gantry Crane / Weihua Crane

Features of Weihua Rail Mounted Gantry Crane for Container Handling:

1. U-type frame, double cantilever with rod, strong, light weight.

2. Large gantry span and width, continent container loading and unloading

3. 360° rotating spreader with excellent adaptability and efficiency.

4. Long Traveling Mechanism Assembly

5. Frame/Gantry Assembly

6. Trolley Assembly

7. Electrical Control System

8. All digital frequency conversion and PCL control technology

9. High Precision Sensor Data Acquisition Technology

10. Industrial computer data analysis and processing system

Rail-type container gantry crane is mainly consists of the steel structure, lifting mechanism, micro-transfer mechanism, spreader anti-sway system, crane travelling mechanism, container spreaders, electrical equipment, and other necessary auxiliary equipments.

The container rail mounted gantry crane adopts frequency conversion, PLC control system and CMMS fault detection system. Main standard reference: GB/T19683-2005, JT/T566-2004, and ISO standard of International Standardization Organization, European FEM, Japan JIS standard.

Features of Container Rail-Mounted Gantry Crane:

1. This crane can be used in inland terminals, container yard, rail freight station, coastal freight yard and frontier wharf.

2. Adopt dedicated container spreaders which can handle 20 feet, 40 feet and 45 feet containers.

3. Electrical drive system is full digital AC frequency conversion, PLC control speeding, CMS intelligent monitoring and management system, the running state real-time monitoring equipment.

4. The upper trolley can rotate 270 degree for easy load and unload.

5. Three-in-one reducer is adopted for long travel and cross travel, easy maintenance.

6. Safety protection: Anti-breaking shaft, wind warning, anti-tipping, etc.

Weihua Rail Mounted Gantry Crane

Depending on the constitution of main girder, outriggers and anti-sway device, container rail mounted gantry crane can be divided into different types.

1. Double cantilever gantry crane has big room between its outriggers for containers to pass through. Usually opening widely at upper parts to form a shape of U and combining with the girder forming a shape of N.

2. Non-cantilever crane has a simple structure because of containers do not need to pass through the room between its outriggers.

Compared with ship-to-shore gantry crane, the trolley of Rail Mounted Gantry Crane travels at a lower speed and usually equipped without anti-sway stabilizer, while it will be equipped with anti-sway device if users need it for reducing operation stress and improving production efficiency. For rope type lifting mechanism, increasing the rope damp is a usual way to accomplish stabilization. And for rigid type lifting mechanism, its own rigid components are available to accomplish stabilization.

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Email: weihua@craneweihua.com