Variable orifice for pulverized coal pipe of pulverizer
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United States of America Patent
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Jul 21, 2020
Grant Date -
Apr 16, 2020
app pub date -
Oct 12, 2018
filing date -
Oct 12, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A variable orifice for a pulverized coal pipe of a pulverizer includes a pipe body connected to and installed on a pipeline of the pulverized coal pipe for supplying a pulverized coal from the pulverizer to a boiler and including a diameter expansion portion having a diameter expanded more than a diameter of the pulverized coal pipe; an opening and closing portion installed inside the diameter expansion portion of the pipe body; a rotation actuating portion configured to rotate the inner opening and closing plate and the outer opening and closing plate in mutually different directions; and an opening and closing plate protection member coupled to an inner circumferential surface of each of the inner opening and closing plate and the outer opening and closing plate.
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