The concrete pump wear plate is a part of the S-shaped pumping distribution valve, which is connected to the concrete delivery cylinder. The moving part S tube is driven by the swing cylinder to swing from one side of the concrete cylinder port to the other side of the concrete cylinder port, and the cutting ring is attached to the S tube. The spectacle wear plate swings and forms a switching friction pair with the spectacle wear plate. Due to the rapid swing of the cutting ring, the spectacle wear plate and the ready-mixed concrete are strongly worn, and at the same time it has to withstand the impact force generated when the stone is cut. It can be seen that the spectacle wear plate is mainly in working at room temperature, it can withstand impact, shear and very strong friction.

The spectacle wear plate is an important part of the concrete pump. Although it's volume is small, the technical content and processing cost are high. At present, the life of the spectacle wear plate is about pumping 30,000 m² of concrete. In order to improve the efficiency of the pump truck, it is adopted corresponding measures to improve it's life is very important.

The main failure modes of the wear plate are wear, fragmentation and block failure. The wear between the wear plate and the cutting ring is abrasive wear. First, it is manifested as the cutting ring and the orifice of the wear plate. The edges and corners are blunt, and a smaller arc is formed face wedge-shaped mouth, with the increase of the abrasive particle size involved in the wear, the wear gap will also increase, when the gap is large to a certain value, the construction will be affected by serious slurry leakage. And as the pumping height increases, the impact shear of the plate will increase, the wear will be more severe, and it is prone to chipping.