道岔查照间隔是指在固定型辙叉中辙叉心作用面至护轮轨头部外侧的距离A和翼轨作用面至护轮轨头部外侧的距离B(图1)。道岔查照间隔关系到行车安全,所以在《铁路技术管理规程》中有严格的规定。广大养路工人为维护查照间隔经常付出繁重的劳动。尤其在菱形交叉的钝角辙叉上,因轨距维修允差仅1毫米,很难保持合格状态,而经常发生危及行车安全的车轮擦尖、碰尖现象。因此,改善道岔 Turnout check interval refers to the fixed frog in the frog heart surface to the guardrail rail head outside the distance A and the wing rail surface to guard wheel rail head outside the distance B (Figure 1). Checkpoint clearance intervals related to traffic safety, so “Railway Technical Regulations” There are strict rules. The majority of road maintenance workers often pay heavy labor to maintain the reference intervals. Especially in the intersection of diamond-shaped obtuse frogs, due to the track maintenance tolerance of only 1 mm, it is difficult to maintain the status of qualified, and often endanger the driving safety of wheel wiping tip, touch the tip phenomenon. Therefore, improving the turnout