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交叉渡线是我国铁路上常用的道岔类型之一,它由4组单开道岔及1组菱形交叉组成。我国交叉渡线的标准设计,按产品质量不断改进提高的过程划分有57型、62型和75型。57型由于技术陈旧,已停止生产,62型正在逐渐为75型所代替。 75型交叉渡线是在62型交义渡线基础上设计的,对道岔的平面及零部件结构进行了改进和加强,辙叉采用高锰钢整铸及钢轨组合辙叉两种,零部件采用部颁单开道岔通用件标准,全部图纸经铁道部(78)铁基字349号文批准。全部设计有4种线间距(5.0米、5.3米、5.5米、6.5米)和2种轨型(50公斤
Cross-crossing is one of the commonly used types of turnouts in China’s railways. It consists of four groups of single turnouts and a group of diamond-shaped intersections. China’s cross-crossing of the standard design, according to continuous improvement of product quality improvement process divided 57, 62 and 75 type. Type 57 has been discontinued due to obsolete technology and type 62 is being replaced by type 75. 75 crossover is designed on the basis of the 62-type crossover. The plane and component structure of the turnout is improved and strengthened. The frog is made of high-manganese steel and rail combination frog. The parts All the blueprints are approved by Ministry of Railways (78) Iron Foundation Letter No. 349. All designed with 4 kinds of line spacing (5.0 meters, 5.3 meters, 5.5 meters, 6.5 meters) and two kinds of rail (50 kg