An automatic reset smoke exhaust fire damper

Abstract

The invention belongs to the technical field of fire fighting equipment, and discloses an automatic-reset smoke discharge fireproof valve. A bias spring is embedded to the left side of a valve shell of the automatic-reset smoke discharge fireproof valve. A transmission rod is welded to the right side of the bias spring. A valve disk is welded to the right end face of the transmission rod. A memory alloy spring is arranged below the transmission rod. The left end of the memory alloy spring is connected with the bias spring through a connection sleeve. Multiple temperature sensing guide rods are welded to the memory alloy spring. The automatic-reset smoke discharge fireproof valve has the advantage of being high in response speed; the metal guide rods with the good temperature sensing property are adopted for transferring heat, the structure is simplified, and action temperature is accurate; and the device can be automatically reset after acting and can be repeatedly used, and the problems that a valve needs to be installed again when reused so as to be likely be fused in the prior art, and labor and the cost are wasted are avoided.

Description

technical field [0001] The invention belongs to the technical field of fire fighting equipment, in particular to an automatic reset smoke exhaust fire damper. Background technique [0002] At present, with the rapid development of society and economy, a large number of high-rise buildings are built, and the frequency of fires is getting higher and higher, which brings serious harm and huge losses. In order to reduce fire hazards and losses, mechanical smoke exhaust systems are installed in current building fire protection design, in which fire dampers play a decisive role in fire control. The basic structure of the fire damper includes: valve body, vane, actuator and temperature sensor and other components. The valve body is composed of shell, flange, blade and blade linkage mechanism. The actuator is composed of shell, blade adjustment mechanism, clutch, temperature fuse and so on. The actuator of the fire damper controls the rotation of the blade through the metal fusib...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the prior art is that although the smoke exhaust fire damper of the prior art can be closed when the fire smoke temperature exceeds 280°C to prevent the further spread of the fire from causing losses and endangering personal safety, its temperature sensing mechanism One-time use of fusible alloy sheet is used, which falls after being fused; when the fire damper needs to be opened again, it needs to be replaced manually before it can be used again. The installation process is complicated and the cost of use is increased.

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