方管复合绝缘横担(耐张杆、分支杆)
为解决配网线路全绝缘化问题，上面型式1,2解决了直线杆，方管横担作为-种耐张杆的绝缘化型式，非常方便、有效。
方管绝缘横担采用矩形截面绝缘空心管加绝缘填充物构成，由于方管表面无硅橡胶护套,为满足爬电距离,横担两端安装边相复合绝缘子。绝缘空心管应采用无碱无硼玻璃纤维为增强材料，以环氧、聚氨酯等树脂作为基体材料，拉挤工艺成型。
涂层
方管绝缘横担表面有防老化涂层，无硅橡胶护套。涂层厚度不小于50μm,涂层外观不应开裂。
填充物
方管内填充绝缘材料，绝缘填充物应介质均匀且与方管本体、衬套和封头界面紧密。
衬套及密封要求
横担打孔处装设复合材料衬套，绝缘管空心两端装设复合材料封头，并采用耐候密封胶密封处理。
Name：Square Tube Composite Insulation Cross Arm
Square tube composite insulation cross arm (tension bar, branch bar)
In order to solve the problem of full insulation of distribution network lines, Solid Core Square Rod and T-type Solid Mandrel are used to solve the problem of linear bar. As a kind of insulation type of tension bar, square tube cross arm is very convenient and effective.
Product structure and technology
The insulating cross arm of square tube is composed of insulating hollow tube with rectangular section and insulating filler. Since there is no silicone rubber sheath on the surface of square tube, side phase composite insulators are installed at both ends of cross arm to meet the creepage distance. The insulated hollow pipe shall be reinforced by alkali free and glass fiber, with epoxy, polyurethane and other resins as matrix materials and formed by pultrusion process.
Coating
There is anti-aging coating on the surface of insulating cross arm of square tube, without silicone rubber sheath. The thickness of coating shall not be less than 50um, and the appearance of coating shall not crack.
Fillings
The square tube shall be filled with insulating material, and the insulating material shall have uniform medium and close interface with the square tube body, bushing and head.
Requirements for Bushing and Sealing
Composite bushing is installed at the hole of cross arm, composite head is installed at both ends of insulating pipe hollow and weather-resistant sealant.
应用实例Application cases
