T/HFJX 2004-2018 Earth pressure balance shield machine remanufacturing

Scope

Main technical content: The remanufactured shield tunneling machines shall comply with the technical requirements of GB/T 34651; the remanufacturing of shield tunneling machines shall be based on the principles of high quality and efficiency, energy conservation, material conservation, and environmental protection; the overall performance, economy, environmental protection, safety, and quality of the remanufactured shield tunneling machines shall not be lower than those of the prototype new machines; the key structural components, including the cutter head, shield body, main drive unit, manned cabin, articulated system, propulsion system, segment assembly machine, segment lifting crane, screw conveyor, and belt conveyor, shall be individually inspected and verified before assembly. The remanufactured hydraulic systems and reducers shall be tested in accordance with the corresponding product standards. For structural components that cannot be replaced or are difficult to replace at the construction site, if their remanufacturing lifespan cannot meet the requirements of the overall machine lifespan, new components shall be used. The remanufactured product parts shall bear a clear remanufacturing mark, which shall comply with the provisions of GB/T 27611. All seals and vulnerable parts shall be replaced, except for the cutting tools. The after-sales service and warranty requirements shall not be lower than those of the prototype new machines. It is recommended to apply new materials, new processes, and new technologies to improve the overall performance of the remanufactured shield tunneling machines. The remanufactured shield tunneling machines shall pass product performance testing before leaving the factory. The remanufacturable product parts shall undergo remanufacturing design, including the formulation of remanufacturing technical solutions and the implementation of technical basis.

Development Information

Related Standards