Shipyard Barge Launching Airbags Docking 10 Layers Heavy Duty Airbags For

Product Specification

Warranty 2 Years Shipyard Use Barge Docking Heavy Lifting Airbags

Product Introduction:

The history of heavy lifting airbag dates back to 1981. Xiao Qinghe ship repair and building shipyard, located in Jinan city of Shangdong Province, launched a 60 DWT tank barge with airbag suspension on January 20, 1981. Seven airbags were deployed in that project. One was 2 meters in diameter and 6 meters long and used for elevating. The remaining six airbags were 0.8 meters x 6 meters long and acted as the rollers. The first intention of that trial launch was to develop a prompt, less landform limited ship launching method for warfare purposes.

Feature of Shunhang Products:

1. Big carrying capacity

The carrying capacity of the inflating marine rubber airbag is an important indicator of its quality. The CB/T 37951996, The Airbag For The Ships Up To Slipway And Launching, specifies its working pressure and the load-bearing capacities per meter under various compression ratio. Our new generation of airbags are made of novel rubber compounding and high-tension fortifying fiber. Their carrying capacities have been over one times stronger than the standard requirements. That means that less airbags are needed for the ships up to the slipway and launching if with Shun hang marine rubber airbags meanwhile the safe reliability is also guaranteed.
 

2. High capacity against compression and twisting

When the airbag moves under the ship bottom, it will be compressed between the ship bottom and the ground. As the rolling velocities are not the same among them, they would be torsional deformed. This composite deformation created by both the compression and twisting is described as compressed and twisted movement. When such compression and twisting happens on the air bag, its partial wall would buckle. Then the wall in structure of the multi-layer fortifying fibers would very easily laminate and tear out, resulting the breaking of the fortifying fiber and consequentially the bursting of the entire airbag.

3.New design of anti-bursting construction at the end

For our new generation of airbags, both the rubber compounding and making process are improved so that their structural tearing strengths are improved and so for their capacity for twisting and compression resistance. The deflating possibility would increase at the joint of the end ironwork and the rubber as the working pressure rises.Once it leaks at the end after repeated operation, the end would be more likely to burst out under the high pressure and injure the people.Such accidents due to poor air bag quality have happened many times in the ship launching. We should keep alert on it. To meet the requirement on the air tightness under high internal pressure, the new anti-blasting construction is designed with the end to enhance the binding strength and air tightness at the joint of the bag body and end ironwork. This design could meet the increased working pressure and has been free of the leakage so far in use and proved safe.

The Heavy Lifting Airbag:

Specifications: 

Instruction of Airbag Application in Ship Docking

1. Fasten the hull with the steel cable of traction winch.
 

2. Fill in one or several airbags in the optimum position of the prow bottom. After inflating, the prow shall be lifted to certain height so that the ship can be moved forward by the traction of winch. For ships with flat bottom such as barge and so on, the contacting are between airbags and the bottom is large, if the ship is light, the prow can be lifted by one airbag filled in from the prow. For ships which are difficult to feed in the airbags such as pontoon and so on, the airbags can be threaded from one side to another. If the ship is too heavy, add 1 to 2 or more airbags at certain interval until the prow can be lifted. As to power-driven ship with “V” shaped prow, the airbags must be moved to backward as the lift if not enough due to the small contacting area between the airbags and bottom of ship. Sometimes, the airbags must to be moved backward 1/4 of the length of ship to lift the prow. During being moved backward, precaution shall be taken to prevent scratching on the airbags by the stem. A “V” shaped groove can be dug firstly if possible so as to increase the contacting area between the airbags and the bottom. The coastal shipyard can bury the airbag in proper location during the low tide and pull the ship to where the airbags locate. Inflate the airbags and the ship will be lifted easily. Anyway, the shipyard may adopt applicable methods based on its own conditions.
 

3. Start the winch to move the ship. Feed the airbags gradually in accordance with the requirement of arrangement space until the ship is pulled to the slipway.
 

4.Lift ship with the help of crane, construct hard block, pad ship and remove the airbags.