SKIM800 Insulation Monitoring Device is Applied to the Jintang Subsea Tunnel Project

Recently, the construction of the world's longest undersea high-speed railway tunnel, the Jintang Undersea Tunnel of the Ningbo-Zhoushan Railway, has made key progress. The railway tunnel is being excavated by two ultra-large diameter shield machines, "Ningbo Zhoushan" and "Dinghai", which are tunneling in opposite directions. The first domestically produced shield saturated pressure operation equipment, "Deep Sea Space Station", is applied to solve the problem of changing cutters underwater. As the core equipment supporting and guaranteeing this super project, our company's self-developed SKIM800 series online insulation monitors are fully applied to the cutter head motor system of the shield machine. With high-precision and high-reliability electrical safety monitoring technology, they provide a safety barrier for tunnel excavation under deep-sea ultra-high pressure and complex working conditions, helping to improve the quality and efficiency of domestic major infrastructure projects.

The Jintang Subsea Tunnel is a key controlled project of the Ningbo-Zhoushan Railway. The shield section is 11.21 kilometers long, and the construction area can reach a depth of 80 meters underwater, facing extreme conditions such as high water pressure, complex rock and soil, and high humidity corrosion. The shield machine's cutter head serves as the core "heart" of tunneling, and the stable operation of the motor electrical system is crucial for continuous construction. The deep-sea enclosed and humid environment is prone to causing hidden dangers such as motor insulation aging, electrical leakage, and line faults. In the event of an electrical fault, it will not only cause equipment downtime and project delays, but may also lead to safety accidents, posing extreme challenges to the precision and safety of construction.

The SKIM800 online insulation monitor boasts strong environmental adaptability, perfectly fitting complex working conditions in deep sea areas with high humidity, high pressure, and strong vibration. With its outstanding anti-interference capability, the monitor provides accurate and stable monitoring data, eliminating false alarms and missed alarms. Additionally, the device supports round-the-clock unattended monitoring, eliminating the need for downtime for inspection. This effectively reduces equipment maintenance downtime, significantly enhancing the efficiency of shield tunneling construction, and providing solid technical support for the efficient and steady acceleration of the Jintang Subsea Tunnel's tunneling progress.

The successful application of the SKIM800 online insulation monitor in the Jintang Subsea Tunnel super project marks another milestone for our industrial electrical safety monitoring technology in a national-level major infrastructure project, fully demonstrating the product's excellent quality and reliability. Leveraging our core technological advantages, the product has successfully overcome the challenges of electrical monitoring for deep-sea shield equipment, filling the technical gap in refined electrical safety monitoring for large tunneling equipment under extreme working conditions. In the future, our company will continue to delve deeply into the field of industrial electrical safety monitoring, continuously iterate and optimize product performance, and refine high-precision and high-stability electrical safety monitoring products.