【 Weak current College 】 fire shutter automatically control and detector distance from curtain plate standard---Power By 【 China power house network 】

First, fire shutter control fire shutter system of automatic control is reasonable, is related to a fire can effectively evacuate personnel and prevent the spread of fire. To this end, countries do not yet have clear rules and requirements. The author summarizes the years inspection practice that fire shutter of automatic control, should be in receipt of one or two independent fire signal to start. In other words, fire shutter protection zones should be set a fire detector or a set of two different types of fire detectors. Only when a fire detector or two different types of fire detectors role in fire State, control device to audible alarm signals, fire shutter previous dead point down to full-closed, effectively prevented the fire from spreading. However, for settings in different parts of the fire shutter of automatic control, should also be differentiated. 1. set in non-evacuation channels the mouth of fire shutter. These parts of fire shutter, primarily to prevent the spread of fire, do not need to evacuate. To this end, the State of the fire, when the control receives a fire detector of alarm signal, then the beep sound, fire shutter top dead center down to full-closed, as there is water, the water curtain spray water at the same time. 2. set the channel in the evacuation of the mouth of fire shutter. In order to both ensure the evacuation, and to prevent the spread of fire, in the State, when the control device receives the first fire detectors (smoke detector) alarm signal, then the issue of slow shifting sound, fire shutter top dead center drops from ground 1.8 ~ 2.3m Department (in bits) of the location; control devices receive the second fire detectors (heat fire detectors) alarm signal, then issue a fast noise, diminutive fire shutter delay by 30-40s, then in the middle of the range down to full-closed, as there is water, the water curtain spray water at the same time. 3. the setting of the fire prevention Division Office fire shutter, should fire shutter set on either side of the detector, if non-evacuation channels the mouth of fire shutter, when control devices receive fire shutter any side of a fire detectors and alarm signal, then the beep sound, fire shutter top dead center down to full-closed, as there is water, the water curtain spray water at the same time; if is the passageway of the mouth, when fire curtain control devices receive fire shutter any side of the first kind of fire detectors and alarm signal, then the issue of slow shifting sound, fire shutter top dead center dropped to distance ground 1.8 ~ 2.3m Department (in bits) of the location; control devices receive any side of the second fire detector of alarm signal, then issue a fast noise, diminutive fire shutter delay by 30-40s, then in the middle of the range down to full-closed, as there is water, the water curtain spray water at the same time. The only way to implement automatic control, fire shutter can effectively reach ensures evacuation, and can effectively prevent the spread of fire.
　　
Second, fire detectors, the distance from the curtain panels in fire shutter system, fire detectors is fire State control fire shutter automatically decline of important device. And fire detectors from curtain plate distance of size, for fire shutter can spread when you come down, and effectively prevent the spread of fire. Fire shutter system of fire detectors from curtain panels how far is good, the country is also not required. In order to clarify this issue, consider the following factors on smoke fire-flow velocity. In case of fire, the smoke flow in a vertical velocity of about 3 ~ 5m/s, while the smoke flow in a plane approximately 0.5m/s flow velocity, than people in the scene of action faster. 2. fire shutter lowering speed. The steel fire shutter General technical conditions "(GB14102-93) section 5.10.1 stipulates:" entrance height less than 2m, 2 ~ 6m/min; entrance height 2 ~ 5m, 2.5 ~ 6.5m/min; entrance height greater than 5m, 3 ~ 9m/min ". The overall average rate of decline is about 0.8cm/s or so. 3. alarm delay time. The fire alarm Controller General technical conditions "(GB4717-93) 4.2.1.11 stipulates:" fire alarm controller within or under the control of the query, interrupt, judgement and data processing operations, for reception of fire alarm signal delay should not exceeding 10s ". This means, in fire State control equipment in the 10s inner would receive the fire alarm signal, and the issue of control directive and the sound signal to start and control equipment. 4. probe protection RADIUS. The automatic fire alarm system design specifications "section 6.1.2 stipulates: because the room height and slope, fire detectors and an area of protection RADIUS too, such as thermal detectors, local surface area greater than or less than or equal to 30m2 30m2, room height is less than or equal to, its protection 8m RADIUS 3.6m and 4.4m respectively. To sum up, such as fire detector too close from the curtain panels, fire, and before the curtain panels from dead point decline, the fire spread over fire shutter, fire shutter loses to prevent the spread of fire. As fire detectors (thermal detectors) from curtain panels larger than 3.6m, fire shutter near the detector of blind spot, under fire, fire shutter also lost to prevent the risk of the spread of fire. In order for the detector to detect in time the fire protection district, in the spread of fire to fire shutter before fire shutter would start declining, effectively prevent the spread of the fire detectors from curtain plate surface horizontal distance is 3 ~ 3.5m, two fire detector distance should be greater than the distance to the entrance 1m, on the edge of the horizontal distance should 0.5 ~ 1m. Fire detector is not only a fire facilities, but also is a kind of decoration embellishment, should enable it to set uniform, symmetrical.

In short, give the feeling of beauty, in the event of fire, and can effectively prevent the fire from spreading, protection and security of people's lives and property. At the same time, expectations of the relevant State departments timely fire shutter system design specifications and fire shutter system construction and acceptance in order to enable the design, construction, inspection and regulatory agencies have a unified standard.