Baffle plate of flue

Abstract

The invention discloses a baffle plate of a flue. The baffle plate of the flue comprises a shell, a baffle plate body, a shaft, bearings, support frames, an actuator, waterproof covers, and heat dissipation fins or annular plates. The shell can be in a circular shape or in a square shape or in other shapes, the shape of the shell corresponds to the shape of the baffle plate body, the baffle plate body can be a single-shaft baffle or a multi-shaft baffle according to the shape and the size of the baffle plate body, the baffle plate body is connected with the shaft, and the shaft penetrates through a sleeve and is matched with the bearings. Bearing seats are fixed on the support frames which are fixed outside the shell, one end of the shaft is connected with the actuator, and the other end of the shaft is in axial unconstrained sliding fit with one bearing. The waterproof covers and the heat dissipation fins or the annular plates play roles of water resistance and heat dissipation for the bearings and shaft holes. The baffle plate body, the shaft and other inner parts are coated with heat insulation paint so that the baffle plate body, the shaft and other inner parts are prevented from carbonization and deformation under high-temperature conditions; and the joint bearings and / or universal joints are adopted, so that the defect that production is affected due to the fact that the baffle plate is blocked after deformation caused by installation or heat and stress is overcome, the defect that sealing is affected after a traditional structure deforms mechanically is also overcome, and the problem that leakage happens due to the mechanical deformation is solved.

Description

technical field [0001] The invention relates to the technical field of baffle doors for boiler systems, in particular to a flue baffle in which the thermal expansion of the shaft after the shaft is heated can be released through axial serial movement. Among the patent classification numbers involved: F23 combustion equipment; combustion method F23J removal or treatment of combustion products or residues; flue F23J13 / 00 chimney or flue accessories. Background technique [0002] The flue baffle is a baffle door for regulating flow in the chimney or flue of petroleum, chemical, electric power, metallurgy and other industries. The existing flue baffle is as described in ZL201120489424.0, the bearing is fixed on the housing, and the shaft is fixed on the bearing. For rolling bearings, people are used to design the shaft and the inner ring of the bearing as an interference fit, and at the same time There is a shaft shoulder attached to the axial end face of the inner ring of the ...

AI Technical Summary

Problems solved by technology

There are only about 100 baffles and air doors in a branch of China National Petroleum Corporation, which are difficult to open and close. The flue baffle has the problem of difficulty in opening and closing. The reasons for these design problems are: 1. Traditional design and thinking habits, 2. The provisions of the mechanical design manual

It is these two points that constrain the problems that people should consider when designing the flue baffle, and the high temperature of the bearing is hardly considered

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