Actuating mechanism of fireproof smoke exhaust valve

Abstract

The invention discloses an actuating mechanism of a fireproof smoke exhaust valve, which includes a valve body (1), a main shaft (2), a rocker arm (3), a swing frame (4), a swing rod (5) and an electromagnet (6), wherein a base (20) and a fuse (7) are fixed on the valve body (1); the outer end of a mandrel (6.2) of the electromagnet (6) is hinged with one end of the swing rod (5); a torsional spring is arranged between the swing frame (4) and the base (20); one end of the swing frame (4) is propped against the inside of a gap (5.1) of the swing rod (5) under the action of the torsional spring; a first tension spring (12) is fixed between the rocker arm (3) and the fuse (7); a second tension spring (13) is fixed between the rocker arm (3) and the valve body (1); and under the action of the two tension springs, a pull rod (3.1) of the rocker arm (3) is hooked in a hook (4.1) of the swing frame (4). The actuating mechanism can automatically close the fireproof smoke exhaust valve after the fireproof smoke exhaust valve is opened and the fire is increased.

Description

technical field [0001] The invention relates to the field of safety engineering, in particular to an actuator for a fire-proof and smoke-exhaust valve. Background technique [0002] At present, high-rise buildings are all equipped with ventilation ducts, and the ventilation ducts are provided with fire-proof and smoke exhaust valves. The fire and smoke exhaust valve includes a valve body, a valve plate is arranged in the channel of the valve body, a main shaft is fixed on the valve plate, and the main shaft extends out of the valve body and is connected with the actuator. The actuator rotates the main shaft to drive the valve plate to rotate, thereby realizing the opening and closing of the entire valve body. For example, when the valve plate is perpendicular to the channel in the valve body, the valve plate blocks the channel, the valve body is closed, and the valve plate and the channel in the valve body are closed. When parallel, the opening of the entire valve body is t...

AI Technical Summary

Problems solved by technology

The executive mechanism of the fire and smoke exhaust valve in the prior art can only be controlled manually, but in the emergency moment of fire, people need to race against time to extinguish the fire or evacuate, and have no time to go to the actuator to manually open the actuator structure; so the fire exhaust valve of the prior art The actuator of the smoke valve is unsafe and inconvenient; and when the fire intensifies, the flame may spread from the ventilation duct of the fire room to other parts of the building. In order to prevent this situation, it is necessary to close the ventilation duct in the fire room after the fire intensifies. fire and smoke exhaust valve, but at this time the room temperature is already high, people can not approach, so it is impossible to manually close the fire and smoke exhaust valve

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