Abstract: Starting with adding the section logic inspection equipment, this paper analyzes the reasons for the phenomenon that the block section in rear of the home signal is cleared later than the section in rear of the home signal and cannot be unlocked normally after adding the equipment, and puts forward measures and suggestions to improve the circuit diagram design, so as to ensure the interlocking safety and reduce the impact on transportation. It has practical value and significance of easy operation and promotion for the design, construction, maintenance and operation units in their daily work.

Key words: block section, clear, section logic check, delay, unlock

摘要： 从增加区间逻辑检查设备功能入手，分析增加设备后存在进站外方闭塞分区晚于站内区段出清及不能正常解锁现象的原因，分析产生该现象的原因，提出改进电路图设计等措施和建议，在保证联锁安全的同时减小对运输影响，具有易操作、可推广的现实价值和意义，供设计、施工、维护、运营单位在日常工作中参考和借鉴。

关键词: 闭塞分区, 出清, 区间逻辑检查, 延时, 解锁