老型号变压器排油注氮灭火装置接口改造

Modification for the Interface of Oil Evacuation and Nitrogen Injection Extinguishing Device in Old Type Transformer

根据GB 50016-2014《建筑设计防火规范》规定,单台容量在125 MVA及以上独立变电站油浸变压器应设置自动灭火系统。现在运行的部分125 MVA及以上容量老型号变压器出厂时未配置排油注氮灭火装置,未预留排油和注氮管道孔洞。为解决老旧油浸变压器无接口连接安装排油注氮灭火装置,文中创新性地提出利用变压器人孔、放油阀和取样阀作为连接接口的解决方案。较之目前普遍采用在变压器上新开孔的方法,该方法具有简洁、方便、安全的特点,能极大缩短改造时间,大幅节省施工费用的优点。

According to the regulations of"Code for fire protection design of buildings"(GB 50016-2014),an automatic fire extinguishing system should be installed for a separate oil-immersed transformer with a capacity of 125 MV·A and above.Some of the old type transformers with 125 MVA and above are not equipped the hole with oil evacuation and nitrogen injection extinguishing device,and there are no holes prepared for oil evacuation and nitrogen injection pipes in advance.In order to solve the problems of the old oil-immersed transformer without interface connected to install the oil evacuation and nitrogen injection extinguishing device,an innovative solution of using transformer manhole,oil discharge valve and sampling valve as connection interface is proposed.Compared with the method of opening new holes in transformers,the proposed method has the advantages of simplicity,convenience and safet,which can greatly shorten the reconstruction time and save the construction cost.