Four-way ball valve

Abstract

The invention relates to a four-way ball valve. The four-way ball valve comprises a valve body and a valve plug, wherein the valve body is provided with four fluid inlet and outlet channels, the valve plug is located in an inner cavity of the valve body, a valve seat component is arranged in each fluid inlet and outlet channel, and comprises a pre-fastening spring junk ring, a valve seat support barrel and an annular valve seat seal ring which are coaxial with the fluid inlet and outlet channel and are sequentially distributed along the axis, the annular valve seat seal ring is in sealed fit with the valve plug, the outer side surface of each valve seat support barrel is in sealed fit with the inner wall surface of the corresponding fluid inlet and outlet channel, a circular groove used for clamping the valve seat seal ring is arranged on the end surface, close to the inner cavity of the valve body, of the valve seat support barrel, a plurality of pre-fastening springs are arranged between the end surfaces of each pre-fastening spring junk ring and the corresponding valve seat support barrel, a limit part is mounted on the inner wall of each fluid inlet and outlet channel, and the end surface, far from the inner cavity of the valve body, of each pre-fastening spring junk ring is abutted against the corresponding limit part. The valve seat component greatly improves the sealing reliability of the valve, and the installation, the displacement and the maintenance of the valve seat component are very convenient.

Description

technical field [0001] The invention belongs to the field of four-way ball valves, in particular to a four-way ball valve with good sealing performance and easy assembly. Background technique [0002] For the high-temperature gas medium containing solid particles, the four-way ball valves produced abroad mostly adopt the top-mounted structure of the valve core and the valve seat sealing ring. The valve seat sealing ring is provided with threads and linear motion guide grooves. There are nuts on the sealing ring to adjust the position of the seat sealing ring; most of the four-way ball valves produced in China adopt the structure of top installation of the valve core, the seat sealing ring and the end flange are integrated, and the gap between the seat sealing ring and the bonnet A connecting body is provided, and the three are connected to each other through fasteners such as bolts. The assembly and maintenance of the above-mentioned foreign four-way ball valve products are...

AI Technical Summary

Problems solved by technology

The assembly and maintenance of the above-mentioned foreign four-way ball valve products are relatively difficult, and at the same time, the required size of the middle cavity of the valve body is relatively large, and the weight of the valve is relatively large; domestic four-way ball valve products have many leakage factors, and the valve sealing reliability is poor

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