A dual-type fixed throat acute frog

The present invention relates to a dual type acute frog fixed throat in the throat Zhixin rail frog tip actually "dead space" segment, offset by an edge of the wing rail to the back side of the work top surface that is changed and increased width direction, so that the wing rails heel edge work ahead of the intersection, side wings in orbit by the recent form of the intersection into a regional situations, actually increased a throat to form a double throat area. Double throat region designed for wide-area or other wide region ranging. Advantageous effects of the present invention is that, under the premise of ensuring safe operation of trains, increasing the bearing area wing rail acting frog from theoretical tip to between the throat "dead space" region side in contact with the wheel, to improve the frog of the segment by pOWER, wing rail carrying capacity increase, slowing the vertical peeling off the block premature wear occurs, thereby improving the service life of the frog.