消防排烟风机排烟效果不好的原因主要有以下几个方面:
The main reasons for poor smoke exhaust effect of fire smoke exhaust fan are as follows:
1、风机选择不当。根据规范要求,防烟楼梯前室,分享房间和消防电梯前室的机械压力,送风量,应当通过忏悔,不匹配的值,当会计的价值和标准的规定,应按照大的两个值的承认,一些计划直接根据规范给定值忏悔,往往导致选择风机风量和风压小，不能满足要求;有的方案选择通风和机械排烟系统，但施工时并没有按照规划要求选择双速风机;部分施工单位不按规划的风机型号订购，购买功率规格较小的风机，造成风机风量严重不足。流水槽模具 u型槽模具 电缆槽模具 隔离墩钢模具 护坡砖模具 钢制闸门 螺杆式启闭机 卷扬式启闭机
1. Improper fan selection. According to the specification requirements, the mechanical pressure and air supply volume of smoke proof staircase front room, sharing room and fire elevator front room should be confessed. The mismatched value should be recognized according to the large two values when the accounting value and standard are specified. Some plans confess directly according to the given value in the specification, which often leads to the selection of fan air volume and air pressure, which can not meet the requirements; Some schemes choose ventilation and mechanical smoke exhaust system, but the two speed fan is not selected according to the planning requirements during construction; Some construction units did not order according to the planned fan model and purchased fans with smaller power specifications, resulting in a serious shortage of fan air volume.
2、机械增压送风系统、自然排烟设备反复设置。建筑高度超过50米的公共建筑和建筑高度超过100米的生活建筑,根据高规的要求,适当设置机械加压送风系统,一些项目在上述地区和使用自然排烟,导致火灾情况下,机械加压送风系统与自然排烟窗打开,防烟楼梯间很难形成正压,防烟效果不足。
2. Mechanical pressurization air supply system and natural smoke exhaust equipment are set repeatedly. For public buildings with a building height of more than 50m and living buildings with a building height of more than 100m, the mechanical pressurized air supply system shall be properly set according to the requirements of the high standard. Some projects and use natural smoke exhaust in the above areas, resulting in the opening of the mechanical pressurized air supply system and the natural smoke exhaust window in case of fire. It is difficult to form positive pressure in the smoke control staircase, and the smoke control effect is insufficient.