Supporting special noise elimination air release assembled valve of high-speed centrifugal fan

Abstract

The invention relates to a supporting special noise elimination air release assembled valve of a high-speed centrifugal fan. In the invention, a noise elimination base is fixed on a flange of an end of valve body by a fastener, a perforated plate is arranged on the same flange, a valve rod and a butterfly plate are fixedly connected, a low noise plate, a supporting core housing and the perforated plate are welded together in order, the low noise plate, the supporting core housing and the perforated plate form a U-shaped cavity, a jacket is fixed on the noise elimination base, a sealing chamber formed by the jacket and the perforated plate is filled with sound-absorbing material, a sealing lining is arranged in the valve body, and the butterfly plate and the sealing lining form a seal pair. The invention has the advantages of simple, compact and reasonable structure, small occupying space, low production cost, heat-resistant corrosion-resistant sealing lining in the valve body, long service life and easy replacement of the sound-absorbing material.

Description

technical field [0001] The invention relates to a high-speed centrifugal fan matching special noise reduction and venting combination valve. Specifically, it is a mechanical device used to connect the fan outlet to the atmosphere before starting or stopping the high-speed centrifugal fan in a sewage treatment project and has a noise reduction function. To ensure the safety and reliability of the main engine, it belongs to the technical field of mechanical mechanisms. Background technique [0002] In the prior art, the high-speed centrifugal fan in the sewage treatment project needs to be equipped with a vent valve to ensure the safety and reliability of the fan starting or stopping. The vent valve is installed at the outlet of the fan, so that the outlet of the fan is connected to the atmosphere. In order to reduce the aerodynamic noise discharged into the atmosphere, a muffler needs to be installed at the outlet of the vent valve. At present, typical cylindrical resistive ...

AI Technical Summary

Problems solved by technology

At present, typical cylindrical resistive mufflers are mostly used. This type of muffler takes up a lot of space and has a complicated structure.

Due to the high temperature of the air discharged by the fan and the high humidity of the place, it has an erosive effect on the sealing material of the valve and the sound-absorbing material in the muffler, reducing the service life, resulting in frequent replacement of the valve sealing ring and the sound-absorbing material of the muffler, making the maintenance work very difficult. strenuous

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