钢丝绳牵引普轨卡轨车是煤矿井下常用的辅助运输设备，对于普轨全卡形式的卡轨车，现有道岔无法满足牵引车的通过要求，为此有必要设计一种与之相适应的卡轨车专用气动道岔。本文设计了气动道岔的机械结构和气动控制系统，阐述了工作过程及原理。该道岔实现了气动变轨、轨道锁止等功能，解决了卡轨轮通行、钢丝绳导向及隐藏等相关问题，完善了卡轨车现有技术。

Wire rope haulage trapped rail car for standard rail is a commonly used auxiliary transportation equipment in coal mine. For the full route trapped standard rail car, the existing turnout can not meet the requirements of the tractor. Therefore, it is necessary to design a special pneumatic turnout for the trapped rail car. In this paper, the mechanical structure and pneumatic control system of pneumatic turnout are designed, and the working process and principle are expounded. The switch realizes the functions of pneumatic track change and track locking, solves the problems of track clamping wheel passing through, wire rope guidance and concealment, and improves the existing technology of trapped rail car.