Essential details
MOQ:5
Lead time:2 weeks
Shipping:Express Delivery, Air freight, Land freight, Ocean freight
Product Introduction
Scrapers are crucial cutting components that directly come into contact with the rock and soil mass at the excavation face, and are typically installed on the cutter head panel or the edges of the openings. Their primary function is to strip and break up soil or soft rock through rotary cutting, and guide the muck into the soil chamber, thus creating conditions for the forward advancement of the shield machine. They are mainly used in soft ground formations, such as cohesive - poor soft soils like clay, silt, and sand layers, or strongly weathered rock layers.
Design considerations:
Wear resistance:
Wear resistance:
The cutter head should be made of high - hardness materials (tungsten carbide alloy), and wear - resistant coatings or surfacing layers may be added.
Impact resistance:
In strata containing obstacles or with non - uniform properties, the scrapers should be designed to prevent chipping or breakage of the cutting edges.
Muck discharge efficiency:
The shape and arrangement of the scrapers should facilitate the flow of muck and prevent adhesion or blockage.
The rational selection and arrangement of scrapers directly affect the tunneling efficiency of the shield machine, tool consumption, and ground adaptability, and are among the core considerations in the design of shield cutter heads for soft ground formations.