该项技术的研发源于对传统造船与下水方式弊端的深入剖析，以及对更高效、更节能的新工艺的不断探索。随着全球船舶制造业的快速发展，传统下水方式在占地面积、岸线依赖、施工周期、能耗成本等方面面临诸多制约。在这一背景下，青岛永泰的技术团队开创性地研发出“子船通过滚动气囊从母船下水”的新型工法。该技术通过在浮动船台或载运驳船甲板上铺设充气滚动气囊，实现子船的安全、高效下水。整个过程通常沿船舶纵向进行，且母船与子船的重量和尺寸比例可达1:1，即母船可承载并释放与自身同等规模的船只。
该项技术的推广应用，为“海上造船”提供了切实可行的解决方案，大大减少了对岸基设施的依赖，节省了土地成本。同时，借助母船运输并完成子船的下水操作，也显著降低了拖带运输的费用，提高了造船效率与灵活性，具有显著的经济与社会效益。
目前，该技术已获两项国家知识产权保护（授权号：ZL201710181705.1），并在印尼和几内亚等地的多个项目中成功实施，已顺利完成20余艘千吨级船舶的下水作业，获得了业内广泛认可和业主的高度评价。
作为船用气囊与护舷领域的领军企业，青岛永泰始终坚持以创新驱动发展，以实用引领变革。未来，公司将继续深耕核心技术，不断推进海洋工程领域的技术进步，助力中国智造走向更广阔的国际舞台。
After more than 20 years using experience, most shipyard are very familiar with the NEW technologies of marine launching airbags, which can also used as salvage airbag and water-blocking airbags, but there still are some end-users being not confident with it. So, Qingdao Evergreen summarize below advantages of these airbags to address customers’ concern:
1. Significant Cost Savings
• Low procurement and operational costs: Compared to constructing dry docks or purchasing large-scale lifting equipment, the purchase cost of airbags is considerably lower. Moreover, they eliminate the need for maintaining complex facilities over the long term, reducing capital investment by 30%-50%.
• Easy maintenance: Only regular inspections of the airbag’s exterior, valves, and other components are required, eliminating the need for specialized maintenance equipment and drastically reducing labor and time costs.
2. High Operational Flexibility and Stability
• Controllable buoyancy: By adjusting the air pressure inside the airbags, the buoyancy can be precisely controlled to support the ship’s weight, avoiding imbalances caused by uneven friction in traditional slipway launches (e.g., the detachment of skids leading to ship tilting, as seen in the North Korean destroyer incident).
• Flexible attitude adjustment: The ship’s tilt angle can be controlled by gradually deflating or inflating the airbags, ensuring a smoother launching process. For instance, the “aft tilting” technique mentioned in the references leverages gravity for a natural water entry, minimizing mechanical intervention risks.
3. Substantial Reduction in Safety Risks
• Avoidance of traditional accident risks: Traditional slipway launches are prone to accidents due to parallelism deviations in skids (e.g., the stern skid detaching first in the North Korean incident, causing hull damage) or sudden changes in friction coefficients. Airbags distribute risks evenly through uniform pressure bearing.
• Strong resistance to environmental disturbances: Airbags adapt well to changes in tides, wind, and other external factors, reducing the impact of sudden forces on the hull.
4. Outstanding Applicability and Convenience
• Easy transportation and storage: When deflated, airbags are compact and lightweight, enabling rapid transportation to different sites—ideal for temporary construction or remote shipyards.
• Versatile application: Suitable for ships of various tonnages (from small fishing boats to 5,000-ton destroyers) and complex terrains (e.g., inclined shorelines).
5. Improved Construction Efficiency
• Quick deployment: No need for prolonged construction of slipways or dry docks; airbags can be deployed within hours, shortening project timelines. For example, repairing the damaged hull in the North Korean incident took about two weeks, whereas airbag deployment would take only a few hours.
• Reusability: Airbags have a long lifespan (high-quality products can be reused over 50 times), making them suitable for multiple ship launches.
Case Comparison: Traditional Slipway vs. Airbag Launching
• North Korean Destroyer Incident (Traditional Slipway): Skid detachment caused hull imbalance and damage, requiring approximately two weeks for repairs.
• Airbag Solution: If airbags had been used, real-time attitude adjustments via pressure control could have prevented structural damage, reducing repair time to 2-3 days.
Summary
Marine launching airbags are the preferred choice for modern ship launches due to their low cost, high safety, and strong adaptability, suitable for all-sized shipyards or emergency repair scenarios. Their technical principles share similarities with water-blocking airbags for drainage pipes (e.g., the sealing performance and specification adaptability demonstrated in the Dalian case), both reflecting the flexible application of inflatable tools in engineering fields.
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