Flue butterfly valve for achieving flue gas emission zero leakage

Abstract

The invention provides a flue butterfly valve for achieving flue gas emission zero leakage. According to the butterfly valve, pressing rings are installed at the upper and lower ends of a valve body,fluoroplastic cloth is tightened on the pressing rings to form a hollow cylinder, a disc plate is installed in the cylinder formed by the fluoroplastic cloth, the pressing rings at the two ends are connected with the valve body through connecting bolts, the valve body is provided with an air nozzle and a pressure gauge interface, and the air nozzle and the pressure gauge interface communicate witha flue in the butterfly valve. The air nozzle installed on the valve body is connected with an external pressure increasing device, and the pressure gauge interface is connected with a pressure gauge. The butterfly valve adopts the valve body made of the fluoroplastic cloth, the flexible fluoroplastic cloth is used instead of a rigid valve seat, and therefore it is not necessary to precisely process the valve body sealing surface, namely the valve seat; and fluoroplastic has the non-stick property, so that the valve seat has the self-cleaning function, the size of the valve seat can be effectively controlled through an external air source, and the purpose of controlling the sealing performance of the valve online is achieved.

Description

technical field [0001] The invention relates to the field of valves and machinery, in particular to a flue disc valve for zero-leakage flue gas discharge. Background technique [0002] At present, the consensus of the whole world is that people must effectively protect the environment in the process of transforming their lives. The conversion and use of energy is an indispensable content in the process of people's life. The generation and emission of flue gas are indispensable in energy conversion. For this reason, the country has formulated strict control procedures, and it is very important to realize the performance of the flue gas discharge valve. [0003] The closed flue butterfly valves in the prior art all use the interference fit between the butterfly plate 6 and the valve seat 15 of the valve body (see attached Figure 4 , 5 ), the formation of a sealed specific pressure is achieved. The main solution in the prior art is the sealing problem between the front half-...

AI Technical Summary

Problems solved by technology

It cannot be controlled when working online, and the maintenance cost is high, which brings a lot of inconvenience to production

The third is that in the process of energy conversion, the diameter of the flue is relatively large, the pressure is low, the composition of the flue gas is complex, and most of them have a certain degree of corrosion and adhesion, so it increases the difficulty of valve manufacturing material selection and maintenance, and the application cost very high

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