Silencing device for outlet of fire-fighting smoke exhaust fan

Abstract

The invention discloses a silencing device for an outlet of a fire-fighting smoke exhaust fan. The silencing device comprises a smoke exhaust pipeline connected to the outlet of the fire-fighting smoke exhaust fan and a noise elimination cylinder connected to the outer portion of the smoke exhaust pipeline in a sleeving mode. The noise elimination cylinder is formed by splicing two arc-shaped plates with semicircular sections, and connecting rods are arranged on the two side edges of the two arc-shaped plates correspondingly. The connecting rods and the arc-shaped plates are integrally formed, bolt holes are formed in the connecting rods, a bolt penetrates through the two communicated bolt holes after the two connecting rods are in lap joint, one end of the bolt is in threaded connection with a nut, and arc-shaped clamping plates perpendicular to the arc-shaped plates are welded to the two ends of the inner sides of the two arc-shaped plates. According to the silencing device, noise generated during working of the smoke exhaust fan is reduced for the first time through sound absorption cotton on a silencing module, noise is reduced for the second time through a silencing box body, a first-stage sound absorption plate, a second-stage sound absorption plate and sound absorption foam in the silencing box body can achieve the triple sound absorption effect, and noise pollution generated during working of the smoke exhaust fan is effectively reduced. And the practicability is good.

Description

technical field [0001] The invention relates to the technical field of fire-fighting equipment, in particular to a muffler for the outlet of a fire-fighting smoke exhaust fan. Background technique [0002] The fire smoke exhaust fan is a kind of fire fighting equipment, which can be used to discharge dense smoke in a fire, reduce the concentration of toxic smoke in the fire scene, and protect the safety of people's lives and property. [0003] At present, the fire smoke exhaust fans on the market have the problem of excessive noise, noise pollution, and will reduce the working life of the fire smoke exhaust fans. Although some fire smoke exhaust fans are equipped with noise reduction devices, the noise reduction effect is not good. , and the installation process of the noise reduction device is relatively complicated, so it is necessary to invent a noise reduction device for the outlet of the fire exhaust fan, which can reduce the noise of the fire exhaust fan and further ma...

AI Technical Summary

Problems solved by technology

[0003] At present, the fire smoke exhaust fans on the market have the problem of excessive noise, noise pollution, and will reduce the working life of the fire smoke exhaust fans. Although some fire smoke exhaust fans are equipped with noise reduction devices, the noise reduction effect is not good. , and the installation process of the muffler device is relatively complicated, so it is necessary to invent a muffler device for the outlet of the fire exhaust fan, which can reduce the noise of the fire exhaust fan and further make up for the shortcomings of the existing equipment

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