Rainproof conical air cap

Abstract

The invention relates to a rainproof conical air cap applied to mechanical ventilation engineering and suitable for high-altitude emission of general gas, toxic and harmful gas and dusty gas. The rainproof conical air cap comprises an upper umbrella-shaped cap, a lower umbrella-shaped cap, a flow guide water retaining ring, a connecting pipe and an outer water dispersing cap are sequentially arranged from top to bottom; an upper conical cap is arranged on the outer side of the upper umbrella-shaped cap; a lower conical cap is arranged on the outer side of the lower umbrella-shaped cap; the conical top of the lower umbrella-shaped cap is higher than a contact surface between a flow guide water retaining ring and a connecting pipe; the flow guide water retaining ring is a circular truncatedcone; the upper and lower circular surfaces are transparent; the circular truncated cone has a certain flare angle and is horn-mouth-shaped; the diameter of the smaller end is equal to that of the connecting pipe and is tightly combined with the connecting pipe; the diameter of the larger end is equal to that of the umbrella bottom of the lower umbrella-shaped cap; and connecting surfaces among the flow guide water retaining ring, the connecting pipe and the outer water dispersing cap are continuously welded to ensure that the the connecting surfaces are sealed. Through a rainwater collectingand discharging part of the device, the rainwater can be smoothly and timely discharged; and a discharging device has an optimal flow field and a minimum local resistance coefficient.

Description

technical field [0001] The invention relates to a rain-proof conical wind cap, which is used in mechanical ventilation engineering and is suitable for high-altitude discharge of general gas, poisonous and harmful gas and dust-containing gas. The exhaust port on the top of the device can make the air flow rise to a certain extent, which is beneficial to the atmospheric dilution of the exhausted gas; the special rain collection and drainage components enable the rainwater to be discharged smoothly and in time, preventing rainwater and rainwater containing harmful substances from flowing along the inner wall of the pipe and The outer wall travels down the flow, eroding the pipe. Background technique [0002] The hood is the terminal equipment installed in the outdoor exhaust system, and is used at the outlet of the exhaust system. In the mechanical exhaust system, the commonly used ones are umbrella-shaped hood and conical hood. When the exhaust gas contains poisonous and har...

AI Technical Summary

Problems solved by technology

When the exhaust gas contains poisonous and harmful gases and dusty gases, the general umbrella-shaped hood is not conducive to the atmospheric dilution of the exhaust; while the conical hood given by the national standard atlas can solve the problem of "airflow lift and atmospheric dilution", but In rainy days, the rainwater collected by the top exhaust port cannot be discharged in time, and part of it enters the pipe and erodes the inner wall of the pipe, even endangering the normal operation of the system. The other part flows down the outer wall of the exhaust tube and erodes the outer wall of the pipe.

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