随着照明业的不断发展，照明灯具的性能特点也在日渐多元化；LED三防灯不但从防水、防尘、防腐等方面提出了更高要求，而且在安装便利、结构美观和光角度能调整等方面也须逐渐能满足使用要求。根据三防灯的实际工作环境，对灯具的防护结构采用可靠性更强的一体化内腔式塑料壳体结构,并进行特殊的表面喷涂和密封处理,可在高温潮湿和各种腐蚀性恶劣环境下使用，可靠满足防水防尘防腐等防护要求。较好的罩壳一体化形成内腔式的设计，包括罩壳、内支架、边盖、防水橡胶套、安装支架、LED 灯条 。   罩壳即为一个管状壳体，内支架的外形与罩壳的内腔形状相配且插置在罩壳的内腔，LED 灯条沿内支架的长度方向固定安装在内支架上，边盖封堵在罩壳的端口上，在边盖与罩壳的端口之间设有防水橡胶套，安装支架下部与边盖连接。这样，由于罩壳为一个管状构件，在其两个敞开端口上分别封堵边盖和防水橡胶套，使其内腔成为一个完全封闭的空间，防水性能好。而且，在罩壳两端的边盖上皆安装安装支架，可方便的调整灯具的照射角度，安装、使用皆十分方便。  关键词:LED；三防灯；结构防护；封密空腔；调整角度；管状构件  

　　Abstract: 

　　With the continuous development of the lighting industry, the performance  characteristics of lightings are also increasingly diversified. LED Tri-proof light not only put a higher demand from waterproof, dustproof, corrosion, etc., but also in the ease of installation, structural beauty and light angle can be adjusted, it is also to be increasingly meet the requirements.  According to the actual work environment of tri-proof light, using the improved  reliability integrated cavity plastic shell for the luminaire protection structure and special surface coating and sealing, which can help using in the hot, humid and corrosive environment, satisfying requirements of waterproof, dustproof and anti-corrosion  protection. Better housing integration with formed intracavity design includes housing, stent, side cover, waterproof rubber sets, mounting brackets and LED light bar. Housing is a tubular shell, the cavity shape ties in the shape of inner stent, which  interposes in the housing cavity. The LED light strip fixes with mounting bracket along 

　　the longitudinal direction of the stent and side cover seal blocks the ports of shell, with a waterproof rubber sleeve on the casing between the side cover, connects the mounting bracket and the lower portion of the side cover.  Thus, since the housing is a tubular member and its two open ports are blocked with cover and waterproof rubber sleeve, which help it become a fully enclosed cavity space 

　　with waterproof performance. Moreover, irradiation angle side close the cover are installed at both ends of the mounting bracket, it adjust lighting angle, installation and use very convenient.