Anti-locking high-temperature seal butterfly valve

Abstract

The invention provides an anti-locking high-temperature seal butterfly valve and belongs to the technical field of seal butterfly valves. The anti-locking high-temperature seal butterfly valve is used for preventing the occurrence of high-temperature locking fault of a seal valve. According to the technical scheme, a valve body seal ring of the seal butterfly valve is located on the inner side of a valve body supporting seat, a plurality of locking bolts are arranged on the periphery of the valve body seal ring in the horizontal direction and connected with the valve body supporting seat, the contacting face between the valve body supporting seat and the valve body seal ring is provided with a directional pin, the directional pin is arranged in the diameter direction of the valve body seal ring, and a gap of 2-3 mm is formed between the outer circumferential face of the valve body seal ring and the inner circumferential face of the valve body seal ring. By means of the anti-locking high-temperature seal butterfly valve, the limitation of the temperature changes of the valve body on the dilatation of the valve body seal ring is eliminated, the influence of temperature rise dilatation on the valve sealing pair junction surface is also eliminated, the locking phenomenon of the seal butterfly valve is avoided, and meanwhile the valve can be in a good sealing state all the time. The anti-locking high-temperature seal butterfly valve has the advantages that the structure is simple, the design is reasonable, the problem that the fault of locking occurrence of the high-temperature seal butterfly valve in high-temperature working conditions is not solved for a long time is solved, and the economic benefit of enterprises is remarkably improved.

Description

technical field [0001] The invention relates to a sealed butterfly valve used in a blast furnace dust gas system, belonging to the technical field of sealed butterfly valves. Background technique [0002] The sealing butterfly valve is an important equipment in the dust gas system of the blast furnace. During use, the metal sealing butterfly valve close to the blast furnace often suffers from high temperature locking failure, which has become a serious problem affecting production. Once the valve is thermally locked, the furnace must be shut down to cool down, and the valve can only be opened to resume production when the system temperature drops to near normal temperature. Every time a thermal lock occurs, it will cause hundreds of millions of yuan in wind loss, seriously affecting the economic benefits of the enterprise. [0003] The high temperature thermal lock phenomenon of the sealed butterfly valve is caused by the comprehensive factors of the material and structure ...

AI Technical Summary

Problems solved by technology

[0005] At present, the fault of the existing high-temperature sealed butterfly valves under high-temperature conditions has not been effectively resolved, which has had a serious impact on the smooth progress of production, not only disrupting the rhythm and continuity of production, but also bringing problems to enterprises. Huge economic losses have come, so the development of anti-high temperature lock valves has become an urgent problem to be solved

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