Railway turnout switch rail insufficient displacement detection device

The utility model discloses an insufficient displacement detection device for a railway turnout switch rail. The device comprises a base plate, the base plate is installed on a top iron of a stock rail through a top iron bolt, a distance detection unit is arranged on the base plate, the distance detection unit detects the minimum rim groove width towards a switch rail, and a vibration reduction protection structure is arranged on the outer side of the distance detection unit. According to the utility model, the distance detection unit is arranged at the installation position of the jacking block at the minimum rim groove of the turnout, distance monitoring is carried out through a method of receiving the reflection of the switch rail, installation is completed on the premise of not changing the structure of the jacking block, and effective positioning and detection of the switch rail at the minimum rim groove are realized. 本实用新型公开了一种铁路道岔尖轨不足位移检测装置，包括基座板，所述基座板通过顶铁螺栓安装在基本轨的顶铁上，所述基座板上设置距离检测单元，距离检测单元朝向尖轨检测最小轮缘槽宽度