Fireproof flap release device

Abstract

The invention discloses a fireproof flap release device which is installed on a shaft head on one side of a flap valve rotating shaft. The device comprises a fan-shaped saw blade, a first torsion spring, a deflector rod, a first spring, a swing rod, a second spring, a hinge shaft and a hinge shaft driving device. A high-temperature self-release assembly comprises a sleeve, an armature, a second spring, an electromagnet, a controller and a temperature sensor. According to the hinge shaft driving device, when a medium in a flap valve reaches the set temperature, the hinge shaft is completely retracted by automatic release, the swing rod is not limited by the hinge shaft, the first spring in a stretched state pulls the swing rod to move linearly, the swing rod pulls the deflector rod to rotate, so that a barb is far away from the fan-shaped saw blade and does not hook a tooth head, the fan-shaped saw blade rotates together with the rotating shaft under the action of the first torsion spring, and the normal of a flap coincides with the axis of the flap valve, and the flap is closed. During resetting, the flap is opened again, then the positions of the swing rod, the deflector rod and the fan-shaped saw blade are adjusted, a fireproof valve body is not damaged, dismounting and replacing are not needed, the repeated utilization rate of the fireproof valve is greatly increased, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fire dampers for civil air defense ventilation pipes, in particular to a fire flap release device. Background technique [0002] Fire dampers are often installed on the supply and return air pipelines of the civil air defense ventilation system or the mechanical smoke exhaust system pipelines. They are usually in the "normally open" state. When the gas temperature in the pipeline reaches the set temperature in the event of a fire, it will automatically close to cut off the air flow and prevent the fire from spreading. . [0003] Most of the existing fire dampers use the temperature control of the fusible alloy installed on the valve, and use the gravity effect. When a fire occurs, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve, so that the valve is automatically closed. There are many defects in the fire damper: the fire damper is closed after the fusible al...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing fire dampers use the temperature control of the fusible alloy installed on the valve, and use the gravity effect. When a fire occurs, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve, so that the valve is automatically closed. There are many defects in the fire damper: the fire damper is closed after the fusible alloy is melted. At the same time, the fire damper is invalid and can only be used once. When it needs to be used next time, it can only be replaced again. The utilization rate of the equipment is not high, and the cost of use is increased.

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