常用防爆类型修理和检验的技术要求要点（一）
隔爆型电气设备的防爆安全原理是通过隔爆外壳从而实现防爆安全。在_防爆标准当中，其定义为“隔爆外壳 d”。Flameproof explosion-proof electrical equipment safety principle is realized through the flameproof explosion-proof security enclosure. Among the international standards for explosion proof, which is defined as "explosion-proof enclosure d".
在隔爆型电气设备中，隔爆外壳一般是由壳体﹑盖﹑紧固件﹑以及穿越壳壁的操纵杆或转轴等组成。作为隔爆设备的壳体与盖大多都是较厚的材质，同时在满足相关标准规定之后，_能够承受住在外壳内部的爆炸时不会被损坏。同时如若承受住爆炸时产生的拉力不会对固定隔爆外壳的紧固件产生断裂与拉伸变形的状况，螺钉﹑螺母等紧固件__具备足够的机械强度。
对于外壳上的_接合面或结构间隙等问题，应_外壳内部的可燃性混合物爆炸时产生火焰不会被传到外壳外部，因为此对于接合面的宽度（L和L1值）﹑间隙（W）和表面粗糙度都_满足防爆标准的规定。
In flameproof electrical equipment, explosion-proof enclosure is generally covered by the shell ﹑ ﹑ ﹑ fastener and through the shell wall of the joystick or the shaft and other components. As flameproof equipment are thicker shell and cover most of the material, while the provisions of relevant standards are met, you must be able to withstand internal explosion of the shell will not be damaged. Should the same time withstand the pull of the explosion will not produce proof shell fasteners fixed to crack and tensile deformation conditions, screws and other fasteners ﹑ nut must have sufficient mechanical strength.
For the case of any joints or structural gaps and other issues, should protect the shell exploded inside the combustible mixture to produce a flame will not be passed to the external shell, as this for the width of joints （L and L1 values） ﹑ gap （W ） and the surface roughness must meet explosion-proof standards.