In the middle of summer, the sun is blazing, and the Waigaoqiao Terminal of Shanghai Port, the world's largest port, is a busy scene, with the No. 130 shore bridge in operation, and a behemoth of more than 30 tons of TEUs (Note: standard containers) being pulled by steel ropes and steadily put in place between the rising and lowering of the winches. It has been in service for more than 10 years with this kind of transformation, which is both rigid and flexible, sometimes fast and sometimes slow.
The driving and controlling core that supports the No.130 shore bridge is the STEP frequency converter!
No. 130 shore bridge, located in the westernmost end of the Waigaoqiao dock shoreline, is a leading enterprise in the port machinery industry Zhenhua Heavy Industry in 2003, its lifting height of 22 meters, the height of the machine room is 27 meters, the load is 40 tons. Originally, the imported brand inverter was used as the electrical drive for trolley, trolley, lifting and pitching.
In 2012, due to the aging of the core electrical drive unit and frequent failures, SIPG decided to upgrade the electrical drive of some of the existing quay bridges. For a long time, the shore bridge drive control has been the territory of international inverter giants. If the use of domestic brands of inverters on the shore bridge drive control, the owners must be full of questions about the safety and reliability. In such an unattainable field for domestic brands, it is a great challenge for domestic brands to break the monopoly of foreign investors.
The owner's side held the mentality of trying to see, STEP conducted a serious investigation, the results were surprised to find that STEP frequency converter of various technical indicators to meet the requirements. Thus, the only one of 27 shoreline bridges was left to STEP for localization substitution.
Unexpectedly, STEP people who dare to challenge the impossible, and Zhenhua Harbor Machinery closely cooperate, so that the owner's decision made in the year achieved a new legend in the industry.
STEP inverter four-quadrant feedback drive overall solution
STEP inverter products
STEP engineers debugging the 130 shore bridge engine room in 2012.
In the past 10 years, the 130th coast bridge has loaded and unloaded 18,000 TEUs per month, with a cumulative total of more than 2.2 million TEUs and a total weight of more than 65 million tons! What is more valuable is that it has maintained the record of zero fault operation in the past 10 years. Today, STEP inverter is still quietly continue to write the domestic inverter in the field of shore bridge stable operation of the new record. STEP's performance has not let down the trust of the SIPG, Shanghai Port crane driver masters laughingly called it is the outside of the second pier on the 2100-meter shoreline of the 27 sets of shore bridge in the "Chinese labor model".
Shore container cranes, referred to as shore bridge (quay crane), is used for loading and unloading of containers on the shore of the ship's equipment, is a representative of the giant construction machinery, lifting industry is known for the high technical difficulty, high work intensity, long maintenance cycle, high reliability requirements of the main heavy equipment.
At present, the container throughput of Shanghai Port is 47 million TEU, ranking first in the world for more than ten consecutive years. Shanghai Port Waigaoqiao Port Area Phase II Project (now Zhendong Company) is an important part of Shanghai's construction of an international shipping center, in 2022 Zhendong Company's annual cumulative completion of container loading and unloading throughput of 6,002,300 TEU, of which the barge throughput of 1,251,600 TEU, and another 7.5 million TEU shuttle bus operations.