Ultra-low temperature ball valve

Abstract

The invention discloses an ultra-low temperature ball valve, comprising a valve body, a valve cover, a valve seat, a ball body, a valve rod, a tee handle and a handle steel tube, wherein the ball body is located at the middle of the valve body, the valve cover is located at both sides of the valve body, the valve seat is arranged between the valve body and the ball body, the lower part of the valve rod is connected with the ball body through the valve body, the upper part of the valve rod is connected with the tee handle, the tee handle is connected with the handle steel tube, and the lower part of the ball body is further connected with a pivot. The ultra-low temperature ball valve is characterized in that: the outside of the valve rod is provided with a filling gland, the lower end of the filling gland is simultaneously connected with the valve body, a valve rod filler is further arranged between the filling gland and the valve rod, and the upper part of the valve rod filler is sequentially provided with a press ring and a disc spring. In the invention, the structure design is novel, and the used sealing material has excellent performance. Due to the characteristics of good stability, long service life and the like, zero leakage of the interior and the outside of the ball valve is achieved. The invention is mainly applied to the ultra-low temperature environment with working temperature within the range of -196 DEG C to -50 DEG C.

Description

technical field [0001] The invention relates to a valve, in particular to a ball valve capable of resisting ultra-low temperature, and belongs to the field of mechanical manufacturing. Background technique [0002] We know that ball valves are widely used in various fields such as petroleum, chemical industry, steel, metallurgy, and electric power. The existing ball valves are generally filled with rubber O-rings or graphite fillers between the valve seat and the valve cover, and between the packing gland and the valve stem. Sealing, the rubber O-ring cannot withstand high temperature or ultra-low temperature, although graphite can be high and low temperature, it cannot withstand the switch, if the number of switches is too many, it will leak after a long time. As an elastic sealing element, it is widely used in the valve manufacturing industry, but the existing rubber O-ring cannot be used at minus 196 °C. Contents of the invention [0003] In order to overcome the defic...

AI Technical Summary

Problems solved by technology

[0002] We know that ball valves are widely used in various fields such as petroleum, chemical industry, steel, metallurgy, and electric power. The existing ball valves are generally filled with rubber O-rings or graphite fillers between the valve seat and the valve cover, and between the packing gland and the valve stem. Sealing, rubber O-rings cannot withstand high temperature or ultra-low temperature, although graphite can withstand high and low temperature, it cannot withstand switching, if the number of switching is too many, it will leak after a long time

As an elastic sealing element, it is widely used in the valve manufacturing industry, but the existing rubber O-ring cannot be used at minus 196°C

Images