Full-automatic secondary action executing mechanism of smoke-exhausting fire-proof valve

Abstract

The invention discloses a full-automatic secondary action executing mechanism of a smoke-exhausting fire-proof valve. The full-automatic secondary action executing mechanism of the smoke-exhausting fire-proof valve comprises a bottom plate, a mounting plate, a driving device, a main shaft, and a rotating wheel limiting device which is fixed on the mounting plate and circumferentially limits the rotating wheel, wherein a first torsion spring, a cam, a rotating wheel and a second torsion spring are sequentially arranged on the main shaft; the cam is fixed on the main shaft; the rotating wheel is sleeved on the main shaft in a rotating way; at least one positioning pin away from the mounting plate is arranged on the bottom plate; a limiting turntable is fixedly sleeved on the main shaft below the bottom plate; and the positioning pin is in sliding fit with the limiting turntable. The full-automatic secondary action executing mechanism of the smoke-exhausting fire-proof valve can automatically reset to close a blade of the smoke-exhausting fire-proof valve, can automatically open the blade of the smoke-exhausting fire-proof valve for exhausting smoke when power is cut off, and can automatically close the blade of the smoke-exhausting fire-proof valve when the smoke-exhausting temperature reaches or exceeds a certain value to realize the fire-proof function.

Description

technical field [0001] The invention relates to a device for controlling the opening or closing of a blade of a smoke exhaust fire damper in a building ventilation system, in particular to a fully automatic secondary action actuator for a smoke exhaust fire damper. Background technique [0002] With the development of my country's economy and society, there are more and more high-rise buildings, and high-rise buildings pay the most attention to fire protection. Therefore, the ventilation system of general high-rise buildings is equipped with smoke exhaust dampers. The blades of the smoke exhaust dampers can be opened to discharge When the blade is closed, it can prevent the thick smoke from spreading to other rooms and corridors. Generally, the opening and closing of the blades that control the smoke exhaust damper are controlled by the actuator. Normally, the blades are closed. Once a fire occurs, the actuator controls the opening of the blades of the smoke exhaust damper to...

AI Technical Summary

Problems solved by technology

However, the secondary action actuator of the existing technology has the following disadvantages: when a fire occurs, power failure often occurs, and the secondary action actuator of the prior art cannot automatically open the exhaust valve when the power is cut off. The blades of the smoke damper are used for smoke exhaust; and the secondary action actuator in the prior art only has the function of manual reset. If the actuator is installed at a higher position, manual operation will be very inconvenient

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