天津港21段码头是我国第一个现代化集装箱码头。作为其标志的是,建于1980年由上海港机厂制造的我国的第一代集装箱岸桥,并于1981年正式投入使用。它的制造成功对发展我国的集装箱装卸机械产业具有非常重要的历史意义。但由于是第一批生产的产品,与许多新产品一样,受当时国内技术水平、配套产品质量的影响,加上设计及制造经验不足,存在不少问题,与先进的国外设备相比更有差距,主要表现为各种设计参数较低,整机效率低,电控落后,结构制造及安装质量差,故障率高。此后,虽曾两次进行过改造,由于只限于局部改造,不是从整机彻底解决问题,因而都 Tianjin Port 21 Terminal is China’s first modern container terminal. As its mark, it was built in 1980 by the Shanghai Port Machinery Factory’s first generation of container quayside in China, and officially put into use in 1981. Its success in manufacturing has very important historical significance for the development of China’s container handling machinery industry. However, as the first batch of products, like many new products, influenced by the domestic technical level and the quality of the ancillary products at that time, coupled with the lack of design and manufacturing experience, there are many problems which are more serious than the advanced foreign equipment Gap, the main performance for a variety of design parameters is low, the machine is inefficient, backward control, structural manufacturing and installation of poor quality, high failure rate. Since then, though it has been rebuilt twice, it is not limited to partial rebuilds,