Slide block type sealing structure

Abstract

The invention relates to a slide block type sealing structure, which comprises a circular sealing slide block component and a spring hanger passing through the axes of the sealing slide block component, wherein the spring hanger passes through the sealing slide block component. The slide block type sealing structure is characterized in that: the sealing slide block component comprises a circular shell of which the upper end has an opening, and a fixed block, a moving block and a press plate assembled in the shell; the fixed block is circular and tightly fixed in the shell, and the inside diameter of the inner wall of the fixed block is increasingly decreased from top to bottom to form an inverted cone cavity; the moving block has a shape corresponding to the inverted cone cavity, is assembled in the inversed cone cavity and consists of two symmetrical semi-circular cones; the shaft axis of the moving block is provided with a sealing hole of which the inside diameter is the same as thediameter of the spring hanger; the spring hanger passes through the sealing hole; the inner wall of the sealing hole is tightly contacted with the outer surface of the spring hanger; and the press plate is assembled in the shell, and pressed onto the fixed block and the moving block. The slide block type sealing structure has simple structure, convenient construction, long service life and no environmental pollution.

Description

Slider type sealing structure technical field The invention relates to a sealing device, in particular to a slider-type sealing structure used for sealing the gap between the boiler roof and the spring suspender. Background technique At present, the spring hanger on the boiler roof is mainly extended from the outside of the furnace roof into the furnace roof to suspend the boiler steam superheater. The thermal expansion and contraction of the boiler steam superheater will cause the swing of the spring hanger, accompanied by steam scouring The vibration generated by the superheater, therefore, there will be a gap between the boom passing through the furnace roof and the furnace roof. This gap needs to be sealed to reduce heat loss, improve boiler efficiency and avoid thermal pollution. In the prior art, the sealing of this gap is usually filled with soft insulating material or bundled around the suspender for sealing, so that the flue gas at the top of the furnace is block...

AI Technical Summary

Problems solved by technology

1. The gap between the suspender and the furnace roof is sealed. Although the sealing performance is good when it is just started and in the cold state, but in the hot state or after a period of use, due to thermal expansion and contraction and vibration of the boiler steam superheater, the suspension The gap sealing filler between the rod and the roof is loose and the seal is damaged, so that the flue gas at the boiler roof leaks at the gap between the boom and the furnace roof, which increases the heat loss of the boiler flue gas and reduces thermal benefit of boiler operation

2. Due to the above reasons, there is high-temperature flue gas leakage at the boiler roof, which increases the temperature of the outer wall of the boiler roof and affects the service life of the boiler. In addition, repeated sealing and maintenance of the boiler roof is required, which increases the daily maintenance cost

3. The flue gas leakage caused by the above reasons, because the flue gas will more or less contain carbon monoxide gas, will deteriorate the working environment and pose a safety hazard to daily maintenance

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