Double-gate-disc casting for petroleum machinery

Abstract

The invention relates to a double-gate-disc casting for petroleum machinery. The double-gate-disc casting for petroleum machinery is prepared from the following chemical components in percentage by mass: less than or equal to 0.08 percent of C, 0.06 to 0.10 percent of Si, 0.05 to 0.2 percent of Zn, 1 to 5 percent of Ti, 0.05 to 0.10 percent of Al, 0.25 to 0.30 percent of Mn, less than or equal to0.025 percent of P, less than or equal to 0.15 percent of Mg, and the balance Fe and inevitable impurities. The possibility of producing a local primary battery during the use process of the double-gate-disc casting can be reduced, so that the electrochemical corrosion is reduced; and in addition, the chemical corrosion of sulfur elements in petroleum on the double-gate-disc casting can be reduced, and the double-gate-disc casting is ensured to have higher strength and toughness, so that the service life of the double-gate-disc casting is effectively prolonged.

Description

technical field [0001] The invention belongs to the field of casting, and relates to a gate casting, in particular to a double gate casting for petroleum machinery. Background technique [0002] In the field of petroleum machinery technology, the knife gate valve generally has only one gate, that is, a single gate knife gate valve. Due to the structural reasons of this single gate knife gate valve, the inner space of the valve body is larger than the diameter of the flow channel, and there is a groove at the bottom of the valve body for including the gate; The increase in the groove increases the height, which hinders the closing of the gate, makes the valve lose its sealing performance, and blocks the flow capacity of the pipeline. The Chinese utility model patent with the application number of 201320129004.0 discloses a double ram shell, including a shell body, which is divided into an upper half shell body and a lower half shell body, and the upper half shell The body a...

AI Technical Summary

Problems solved by technology

Due to structural reasons, the inner space of the single gate knife gate valve is larger than the diameter of the flow channel, and there is a groove at the bottom of the valve body for including the gate; The increase in the groove increases the height, which hinders the closing of the gate, makes the valve lose its sealing performance, and blocks the flow capacity of the pipeline.