Lock slag and lock hopper valve with purging and flushing devices for coal chemical industry

Abstract

The invention provides a lock slag and lock hopper valve with purging and flushing devices for the coal chemical industry. A purging device and a cleaning device are fixedly connected on a valve body, a journal of a valve stem and inner rings of upper and lower bearing sleeves are sprayed with WC (wolfram carbide) and Ni60, and the surface of a valve body bushing, the surface of a valve seat and the inner wall of a ball are all sprayed with the WC. Gaps between the bearing sleeves and the valve stem can be purged, a valve body cavity can be cleaned, occurrence of jamming of the valve is avoided, the valve has better wear resistance and corrosion resistance, and service life is prolonged.

Description

technical field [0001] The invention relates to a ball valve, in particular to a slag lock and lock bucket valve with purging and flushing devices for coal chemical industry. Background technique [0002] At present, in the existing lock slag and lock hopper valves, when the valve is opened or closed, coal powder and coal slag enter the valve body cavity and are adsorbed on the valve body wall, sphere surface and valve seat sealing surface. Over time, the valve body cavity is blocked and sealed. Surface pull marks or even failure; high pressure differential coal powder will also enter the joint between the bearing sleeve and the valve stem, causing the valve switch to be inflexible or jammed; the hardness of the valve stem journal and the inner ring of the bearing sleeve can only reach about HRC32, which is easy to wear , and the flow path of the valve, including the flow path of the valve body bushing, the flow path of the valve seat and the flow path of the ball, will caus...

AI Technical Summary

Problems solved by technology

[0002] At present, in the existing lock slag and lock hopper valves, when the valve is opened or closed, coal powder and coal slag enter the valve body cavity and are adsorbed on the valve body wall, sphere surface and valve seat sealing surface. Over time, the valve body cavity is blocked and sealed. Surface pull marks or even failure; high pressure differential coal powder will also enter the joint between the bearing sleeve and the valve stem, causing the valve switch to be inflexible or jammed; the hardness of the valve stem journal and the inner ring of the bearing sleeve can only reach about HRC32, which is easy to wear , and the flow path of the valve, including the flow path of the valve body bushing, the flow path of the valve seat and the flow path of the ball, will cause perforation of the flow path due to long-term high-speed scouring, resulting in failure of the valve seal

Images