Noise-reducing and rain-proof drainage hood

Abstract

The invention discloses a noise-reducing and rain-proof drainage hood. The noise-reducing and rain-proof drainage hood comprises a cylinder body. The cylinder body comprises an upper cone cylinder anda lower cone cylinder. Each of the cylinder walls of the upper cone cylinder and the lower cone cylinder comprises an inner cylinder wall body, an outer cylinder wall body and a silencing layer. An open lower cone cap is mounted in the cylinder body. A water guide pipe is connected to the lower end of the lower cone cap. The water guide pipe inclines downwardly, penetrates the cylinder wall of the lower cone cylinder and extends out of the cylinder body. According to the noise-reducing and rain-proof drainage hood, noise enters from an air inlet, the noise is absorbed by a punching slicing plate of the lower cone cylinder and the silencing layer, then rebounded to a punching slicing plate of the upper cone cylinder and the silencing layer and then transmitted out through an air outlet; inthe process, the noise is subjected to multiple times of rebounding, slicing and noise reduction, the noise can be lowered to 50-60 dB, the slicing and noise reduction effects are ideal and meet andexceed the national emission standards, and the noise-reducing and rain-proof drainage hood has the function of eliminating the radiated noise of an air outlet of a chimney; and besides, the hood meets the requirements on ventilation and prevention of invasion of sand and dust blown by wind, rainwater and snow water and has the beneficial effects of being small in size, low in weight, easy and convenient to mount, low in cost and the like.

Description

technical field [0001] The invention relates to a chimney wind cap, in particular to a rainproof and drainage wind cap which is installed at the air outlet of the chimney and has noise reduction and rainproof functions. Background technique [0002] Chimney rain cover and rain cap are something similar to an umbrella. It consists of a conical or hemispherical umbrella cap and several support rods. It is generally used on vertically upward vent pipes and chimneys to prevent rainwater from entering the pipe. . [0003] In order to discharge exhaust gas normally, the exhaust gas of the chimney is often discharged through the pressurized fan, which inevitably radiates the noise of the fan and equipment through the air outlet of the chimney. Since the chimney is set at a high position and there is no effective barrier to block it, resulting in a considerable area around The environment is affected by noise, which has a great impact on noise sensitive points. At present, the noi...

AI Technical Summary

Problems solved by technology

However, if the fan machine room does not reserve the position of the muffler, it will be difficult to achieve the noise reduction effect

[0004] Existing wind caps are simple in structure, such as the Chinese patent "Rain-proof and Noise-absorbing Wind Cap", application publication number: CN 105091006A, although the disclosed rain-proof and sound-absorbing rain cap has the functions of noise reduction and waterproofing simultaneously, both effects are similar. Unsatisfactory, such as poor collection and drainage of rainwater, and unsatisfactory noise reduction effects, all of which need to be improved urgently

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