防火阀的应用（Application of fire damper）.docVIP

防火阀的应用（Application of fire damper） The rational use of the fire valve in the engineering design Source: 2006-12-30 Chinese fluid machinery web browsing: 219 Abstract: many design projects, fire valve selection error, It is often seen. location unreasonable phenomenon. This paper introduces the working principle and the performance of the fire valve, analysis of fire valve ventilation, air conditioning and smoke control system in the system should be set up and the reasonable selection of the fire valve. Keywords: fire valve working principle of kinds of reasonable selection of location 1 Overview As the name suggests, the fire valve is used to block the smoke from the fire and flame area, and a certain period of time to meet the fire stability and fire integrity requirements of the valve. When a fire occurs in a building, the fire along the pipeline ventilation and air conditioning system spread rapidly, causing major losses in many cases. The fire caused the loss to the minimum, it must take effective measures to prevent fire and smoke, to control the spread of fire and fire valve ventilation, air conditioning and smoke control system in a reasonable setting, it has played an important role. A lot of engineering design, fire prevention, valve selection error, the setting position of It is often seen. unreasonable phenomenon. 2 fire valve structure and working principle The fire valve structure shown in Figure 1, is mainly composed of a valve body and an actuating mechanism. The valve body comprises a shell, flange, leaf blades and other components linkage. The actuator is composed of a casing, a blade regulating mechanism, clutch, temperature fuse etc.. The fire valve actuator is a fusible metal film and the clutch mechanism to control the rotation of the blades. When the pipeline conveying gas temperature reaches the melting temperature of the fusible metal sheet, fusible film fuse, the mandrel compression spring and spring pin quickly laid clutch plate, then dise