Ventilating duct or flue drainage and fireproof non-return device

Abstract

The invention relates to a ventilating duct or flue drainage and fireproof non-return device which comprises a base, wherein the base is arranged at an outlet of a smoke removal pipeline in a sleeving manner, and a hollow channel is formed in the middle of the base; a baffle plate used for closing the hollow channel is arranged on the base, and the bottom of the baffle plate is movably chained through the base; a control device is arranged at the lower part of the base and comprises a first torsion spring, and the first torsion spring is fixedly arranged in the connecting position of the baffle plate and the base; a temperature control device is also arranged on the base and comprises a second torsion spring and a metal temperature sensing piece; one end of the metal temperature sensing piece is fixedly arranged on the base, and the other end of the metal temperature sensing piece is of a movable end and is butted against the baffle plate; a convex part is arranged at the movable end of the metal temperature sensing piece. The ventilating duct or flue drainage and fireproof non-return device can automatically close the smoke removal pipeline according to the temperature variation in the smoke removal pipeline.

Description

technical field [0001] The invention relates to a non-return device for ventilation and flue drainage and fire prevention. Background technique [0002] In today's society, residential buildings in cities mostly use centralized smoke exhaust channels, and the smoke exhaust or exhaust ducts of each household are connected to the centralized smoke exhaust channels. Or the outlet of the exhaust duct is provided with a movable baffle, which closes the outlet under normal conditions and opens when the smoke is exhausted. The plate cover is at the exit of the smoke exhaust or exhaust pipe, and the thrust of the indoor smoke is used to make the baffle rotate with the pin shaft as the fulcrum to achieve the purpose of smoke exhaust. Although the above structure can achieve the effect of smoke exhaust, but its The opening of the baffle is in the same direction as the gravity and opposite to the rising direction of the flue gas, so the backflow of the flue gas cannot be completely av...

AI Technical Summary

Problems solved by technology

Although this structure can prevent poisonous gas from pouring back, its structure can only be used once. Once the fuse is blown, the entire device can only be removed for replacement, which is less practical; and because it lacks a control structure for controlling the opening angle of the baffle , so that the smoke exhaust effect is poor

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