Dual-spherical hard sealing type flue damper

Abstract

A dual-spherical hard sealing type flue damper comprises a spherical sealing valve plate, a spherical sealing body, a driving shaft, packing boxes, a pneumatic executer and a supporting arm, wherein the pneumatic executer is fixedly connected to a shell, the packing boxes are arranged at the two ends of the driving shaft respectively, one end of the driving shaft penetrates through the corresponding packing box to be connected with the pneumatic executer, and the packing boxes are also fixedly connected to the shell; the supporting arm is fixedly connected to the inner side of the shell, an auxiliary arm is hinged to one end of the supporting arm, driving arms are fastened onto the driving shaft, the driving arms and the auxiliary arm are both hinged to the spherical sealing valve plate, the spherical sealing valve plate is an integrated valve plate, the outer side of the spherical sealing valve plate is attached to the inner side of the spherical sealing body, and the spherical sealing body is welded to the inner side of the shell. According to the technical scheme, the improved flue damper only has one leakage point, namely the space between the integrated valve plate and the spherical sealing body; the outer edge of the integrated valve plate is a spherical sealing surface, and the inner surface of the spherical sealing body is a spherical sealing surface. Optimal linear sealing can be achieved through double-spherical sealing, so that the leakage rate of the flue damper is nearly 0%.

Description

technical field [0001] The invention relates to a special petrochemical equipment, in particular to a double-spherical hard-sealed flue baffle which can be used in catalytic flue gas pipelines. Background technique [0002] At present, the flue gas pipes (D>1.5M) of catalytic devices in the domestic petrochemical industry generally use multi-axis flue baffles. For details, see Image 6 and Figure 7 .The existing multi-axis flue baffle is provided with more than two drive shafts, bearings are provided at both ends of each drive shaft, each drive shaft controls a valve plate, and the space between the baffle plate and the shell is filled with spherical seal. The sealing performance of the multi-axis flue baffle is poor, the valve plate deforms greatly at high temperature, the valve shaft and bearing are easily stuck by the medium in the flue, and the rotation is not flexible, so that the operator cannot adjust it during use. In addition, there are multiple leakage points...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects existing in the existing multi-axis flue baffle, and provide a double-spherical hard-sealed flue baffle with a new structure. The degree of deformation can be improved, and the sealing performance can be improved, so that it is more suitable for practical use.

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