为确保铁路运输的安全、快速，铁路线路不断地采用重型钢轨和新型道岔。如60Kg／m轨道岔、AT轨道岔、复交道岔、可动心轨道岔和分动式外锁闭道岔等。道岔钩锁器是一种在信号停用或道岔设备故障或开行专列等特殊情况时，为确保行车安全，确认道岔开通位置，对道岔进行锁定的一种 In order to ensure the safety and speed of railway transportation, the heavy rail and the new turnout are continuously used in railway lines. Such as 60Kg / m rail turnout, AT rail turnout, compound turnout, movable rail turnouts and movable outside the lock turnouts. Turnout hook lock is a signal in the disabled or turnout equipment failure or special train and other special circumstances, in order to ensure traffic safety, turnout turnout to confirm the location of a switch on the lock