It is one of the most applied technologies in the airbag engineering of ship airbag launching and landing. This technology does not require traditional technology slipway or floating dock, does not require complex mechanical equipment, can be the fastest and easiest to complete the ship launching, ship landing tasks, can save a lot of investment and time for customers. This technology does not occupy a site, and is especially suitable for new plants or some temporary ship launching and landing tasks, such as ship landing repair projects in remote areas. For shipyards that are eager to expand production capacity and are limited by new sites and facilities, ships can be built in existing open space, and then launched with airbag technology, and the open space can continue to be used after launching.

1, the air bag to pull the ship ashore, is the use of Marine air bags in the water to lift the ship, the use of winch to pull the ship to shore. The technology eliminates the need for slipways and docks, making it particularly suitable for applications such as ship repair businesses and rescue operations.

Airbags usually need to rely on tidal changes, at high tide, let the ship as close to the shore as possible, at low tide again close to the stranded bow position, start to put in the air bags, and inflate the bow. A winch is then used to pull the boat forward, with more air bags inserted into the bottom as the hull moves. Repeat the above steps, and eventually the air bag lifts the whole boat, and the boat is pulled ashore by the winch. After the ship landed, it reached the predetermined position, placed the support pier, and then the air bag deflated, the hull fell to the support pier, and the work was over.

2. The main factors that determine the success of airbag up-discharge include: hull weight, ship type, ramp bearing capacity, slope, winch pull and tide. Pulling the boat ashore requires overcoming the gravity of the hull and the friction between the air bags and the ground, so sufficient pulling force is the primary factor to ensure the success of the project. Ships that need to be pulled ashore usually stay in the water for a period of time, and the bottom of the ship is usually covered with shellfish, which needs to be cleaned before the project begins.

3, usually when the ship opens to the predetermined position of the upper row, it is necessary to use the cable to locate the hull. The air bag can be embedded or temporarily inserted at low tide. In order to ensure the sinking of the air bag, the air bag can be pre-vacuumed. If the contact area is small and the lifting is difficult, measures such as sandbags under the air bag can be taken to increase the contact surface, so as to improve the lifting force. When the bow is lifted, more air bags are fed in the stern direction to ensure that the stern does not touch the ground, both to protect the hull and to avoid resistance when pulling the hull. It is necessary to design and build special concrete ramps for the upper discharge of ships with larger tonnage.

Matters needing attention

The tonnage of the vessel using the airbag launching is usually below DWT100000, and the ship's own weight and ship type are the main factors that determine the safety of the airbag launching.

Generally, the width of the launching water should not be less than 1.5 times the length of the hull, and the controlled launching can be launched in smaller waters, but it is only suitable for small ships.

Airbag launching is usually only suitable for longitudinal launching. It is feasible for some wide ships to use airbag lateral launching, but the safety is questionable. Whether special ship type or platform can use air bag launching needs to be discussed in detail.