Arc plate zoom adjustable shrinkage cavity used for coal-fired power plant primary air pipe and work method thereof

A plate scaling type, coal-fired power plant technology, applied in the direction of pipe elements, pipes/pipe joints/pipes, mechanical equipment, etc., can solve the problems of easy accumulation of pulverized coal, failure of adjustment effect, shortened service life, etc., to eliminate pulverized coal Accumulation zone, throttling effect is moderate, reducing the effect of regulating resistance
CN110056736APending Publication Date: 2019-07-26HUADIAN ELECTRIC POWER SCI INST CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HUADIAN ELECTRIC POWER SCI INST CO LTD
Publication Date
2019-07-26

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Abstract

The invention relates to an arc plate zoom adjustable shrinkage cavity used for a coal-fired power plant primary air pipe and a work method thereof. The problem that an existing shrinkage cavity is clamped during adjusting is solved. The shrinkage cavity comprises a zoom adjustable shrinkage cavity mechanism and an execution mechanism, the zoom adjustable shrinkage cavity mechanism is located in aprimary air pipe, the zoom adjustable shrinkage cavity mechanism is in contact with the execution mechanism, the zoom adjustable shrinkage cavity mechanism comprises a lifting connecting rod, a triangular arc plate, a connecting buckle, a connecting rod, a sleeve and an adjusting cam, the execution mechanism comprises a sliding wheel, an A side horizontal connecting rod, an A side adjusting handwheel, a B side horizontal connecting rod, a B side adjusting hand wheel and a sliding vehicle body, the triangular arc plate, the lifting connecting rod and the driving sliding vehicle form the zoomadjustable shrinkage cavity, good seal and smooth adjusting can be achieved, the throttling effect is gentle, the pulverized coal accumulation area is removed, and the influence on the pulverized coaluniformity is reduced.
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Description

technical field

[0001] The invention relates to a zoom-type adjustable shrinkage cavity of an arc-shaped plate used for a primary air duct of a coal-fired power plant and a working method thereof. Background technique

[0002] At present, the primary air duct of coal-fired power plants generally adopts the push-in half-moon-shaped double-core adjustable shrinkage cavity, such as the Chinese patent application number 201720757636. A lot of difficulties came, which affected the adjustment of the wind speed, caused throttling loss, and shortened the service life.

[0003] The main disadvantages of the push-in half-moon double-core adjustable shrinkage cavity: 1) The sealing structure is too simple, and the coal powder in the pipe leaks through the gap between the insert plate and the valve body, causing the screw to fail to rotate or the rotating mechanism to be stuck. The resistance is too large or the adjustment effect is invalid; 2) The half-moon-shaped adjustable shrinkage...

Claims

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