Upper ultra-high-temperature ball valve

Abstract

The invention discloses an upper ultra-high-temperature ball valve. Graphite sealing is replaced by the unique valve seat and valve body sealing structure, the problem of high-temperature oxidation ofgraphite sealing is solved, and meanwhile, the problem about common springs in the ultra-high-temperature state is solved; a boss is designed ingeniously, a valve seat is fixed and pre-tightened, andthe specific pressure for sealing pre-tightening is reached; by the aid of a limiting cap designed ingeniously, the problems that a bonnet is lengthened at the high temperature and a ball is stuck due to expansion of a valve rod are solved; the problem of jamming of particles and powder is solved through purging in the closed and totally-open states of the valve; by the aid of the water cooling design of a jacket, the problem about the strength of the valve body when the temperature increases to 1,000 DEG C abnormally is solved, the safety guarantee is enhanced, and the problem of jamming dueto thermal expansion of the valve is solved.

Description

technical field [0001] The invention specifically relates to the technical field of high-temperature valves, in particular to a top-mounted ultra-high temperature ball valve. Background technique [0002] The top-mounted ultra-high temperature ball valve designed by the present invention is an on-off valve designed for the top outlet of the reaction boiler in the titanium dioxide industry. Since the valve for this purpose is at a working temperature of 800°C for a long time, the temperature will rise to about 1000°C when it is occasionally unstable. This temperature is quite high, which is a great test for the material and structure of the valve. It is easy to cause the ball to expand and get stuck between the ball and the valve seat due to the high temperature, and the valve stem expands and elongates, causing the valve The expansion between the rod and the ball is stuck, which makes the valve malfunction and affects the use. The off-the-shelf valve can meet such a high tem...

AI Technical Summary

Problems solved by technology

The invention provides a top-mounted ultra-high temperature ball valve, which fully considers the jamming problem of high temperature expansion in structure, and solves the jamming problem caused by the expansion of the valve seat and the ball through a unique design of the valve seat assembly. The unique sealing structure of the valve seat and the valve body Instead of graphite seals, it solves the problem of high-temperature oxidation of graphite seals, and at the same time solves the problem of ordinary springs in ultra-high temperature conditions; ingeniously designed bosses, fixed valve seats and pre-tightened valve seats, to achieve sealing pre-tightening specific pressure

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