Side-seam cyclone low-noise gas pressure-reducing valve

Abstract

The invention relates to the technical field of gas pressure-reducing valve equipment for an iron-making blast furnace, particularly to a side-seam cyclone low-noise gas pressure-reducing valve which comprises a valve body, a valve air inlet, a valve air outlet, an air inlet segment, a bell valve segment, a bell valve core, a valve seat device, a bell valve rod and a bell valve umbrella-shaped supporting part, wherein a group of valve rod bracket device is arranged in the air inlet segment to be in slip connection with the valve rod, a side-seam cyclone device is arranged at the outer side ofthe bell valve umbrella-shaped supporting part, two propelling sheave devices are arranged on a valve rod segment and respectively articulated with two shifting fork levers, the upper end of each shifting fork lever is rotationally connected with a supporting shaft, the supporting shaft is articulated with the piston rod of a hydraulic cylinder through a connecting rod, an air outlet segment is sequentially provided with a first-level pressure stabilizing and shunting device, a second-level pressure stabilizing and shunting device and a third-level pressure stabilizing and shunting device, and the side-seam cyclone device is a round pipe fitting provided with a tangential side-seam strip air inlet hole. The invention has the advantages of pressure reduction, speed reduction, noise reduction, convenient operation, maintenance and control, less abrasion and good sealing performance.

Description

technical field [0001] The invention relates to the technical field of gas pressure reducing valve equipment used in ironmaking blast furnaces, in particular to a side seam swirl low noise gas pressure reducing valve. Background technique [0002] The gas pressure reducing valve used in the ironmaking blast furnace is to decompress the high-pressure gas of the blast furnace for the next step of processing. The currently used φ1990mm blast furnace gas pressure reducing valve is mainly composed of three DN700 and DN350 butterfly valves, one of which is an automatic regulating butterfly valve, DN350 butterfly valve and the rest DN700 butterfly valves are driven by motors and reducers. When used in wet gas dedusting equipment, a draft tube is also available. The main defect of this blast furnace gas pressure reducing valve is: one, can send very strong noise in operation process, must be equipped with very strong sound-absorbing equipment for this reason, and the price of this ...

AI Technical Summary

Problems solved by technology

The main defect of this blast furnace gas pressure reducing valve is: one, can send very strong noise in operation process, must be equipped with very strong sound-absorbing equipment for this reason, and the price of this sound-absorbing equipment is up to more than one million yuan; The butterfly valve will vibrate under the impact of high-pressure blast furnace gas, resulting in unstable operation of the equipment; 3. Because the valve body is worn by high-pressure blast furnace gas, it is easy to cause leakage at the packing of the pressure reducing valve group

In actual work, it is found that this kind of pressure reducing valve has some shortcomings: because the airflow passes through the annular seam too fast, the wind speed can exceed 300m / s, and the resulting flow wind noise of the airflow cannot be eliminated, and the noise can exceed 100 decibels; electric drive The mechanism is connected with the bell valve spool through the transmission rod, and the transmission rod passes through the valve body, and the friction between the two causes wear and tear, which destroys the seal of the valve body; the structure is more complicated

So it's not ideal to use

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