Anti-scouring control valve

Abstract

The invention relates to an anti-scouring control valve which comprises a valve element (1) and a valve seat (2). The anti-scouring control valve is characterized in that a flow guide seat (3) is installed in a medium runner at the bottom of the valve seat (2) and at least two throttling pieces (4) are installed at the bottom of the flow guide seat (3). In order to prevent vortexes from being generated at the lower end of the valve seat through coal-oil slurry and prevent the lower end of the valve seat from being scoured by the coal-oil slurry, the vortex flow guide seat is arranged on the lower face of the valve seat in the control valve, when the high-speed coal-oil slurry flows to the upper end face of the flow guide seat, due to the fact that the upper end face is designed to be a conic face and is evenly divided into four parts through flow guide wings, the flow direction of the coal-oil slurry is rapidly changed, an included angle formed between the coal-oil slurry and the conic face is 45 degrees, and the coal-oil slurry flows through the flow guide seat into the throttling pieces; and meanwhile due to the structural design of the flow guide wings, the coal-oil slurry can be effectively prevented from generating the vortexes in a valve cavity.

Description

technical field [0001] The invention relates to an anti-scouring control valve. Background technique [0002] At present, the spool valve seat used in the minimum flow adjustment working condition of the oil-coal slurry pump is a parabolic single-seat spool and a Venturi structure valve seat. The spool valve seat of this structure can meet the working condition requirements in a short time However, under the pressure difference of 24MPa, the service life is short, and it is easy to cause the cavity of the valve body to be easily blocked. After a period of continuous use, the surface of the valve core and the sealing pair are severely scoured, and leakage makes it impossible to maintain pressure and lose adjustment. effect. Even if the valve body is flushed directly after the valve seat is flushed, if it is not discovered in time, external leakage will occur, resulting in the shutdown of the coal-to-hydrogen plant. Contents of the invention [0003] The purpose of the pre...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an anti-scouring control valve, which can significantly improve the defects of the valve core and seat of the control valve being washed out and short service life under the high pressure differential oil-coal slurry working condition, and avoid the gap between the valve core and the valve seat. The area of ​​the intermediate ring is easy to block, and it can also prevent the eddy current of the oil-coal slurry in the control valve cavity, and effectively control the flow rate of the oil-coal slurry at the outlet of the control valve

Images