Three-throw turnout

Abstract

The invention discloses a three-throw turnout which is a different-direction asymmetric three-throw turnout. The three-throw turnout comprises a first trip switch, a second trip switch, a first fixed curved frog, a second fixed curved frog and a third fixed curved frog which are sequentially arranged. Forks on the side faces of the fixed curved frogs are not symmetrically distributed and are distributed in a front and back staggered mode so that the sharp corner of a switch rail can be set large and the steel rail head cross section at the same position can be wide, and therefore the strength of the switch rail can be enhanced, and service life can be prolonged. Point rails, for straight passage, of the fixed curbed frogs are straight lines, point rails, for lateral passage, of the fixed curbed frogs are curved lines, the radius of the point rails for lateral passage is the same as that of lead curve rails, in this way, equivalently the length of the lead curve rails is increased, and therefore the radius of lead curves can be increased under the condition of an existing station yard track, the lateral passage speed of a train is increased, and transportation efficiency is improved.

Description

technical field [0001] The invention relates to a railway track connecting device, in particular to a three-way turnout. Background technique [0002] A turnout is a basic connection device for railway tracks. The turnouts included in the "Manual of Main Parameters of Commonly Used Turnouts" by the Ministry of Railways are divided into single-opening turnouts, symmetrical turnouts, double-crossing turnouts, and cross-crossing turnouts. The three-way turnout refers to the turnout that leads from one direction to three directions. The three-way turnout is a special kind of turnout. When there are many lines to be connected and the terrain is restricted, two single-way switches cannot be continuously laid on the main line. Three-way turnouts are used for turnouts, which are usually laid in marshalling yards, freight yards, and locomotive depots. The two sides of the currently used three-way turnout are symmetrically distributed relative to the centerline of the straight-way ru...

AI Technical Summary

Problems solved by technology

This kind of three-way switch, because two pairs of switch rails are arranged on the switch at the same time, the tips of the four switch rails are aligned, the lateral switch rails are close to the straight switch rails, and the tip angle of the switch rails is small, so the strength of the switch rails is not high. Easy to wear and difficult to assemble

Moreover, the fixed frogs used in existing three-way turnouts are all straight frogs, that is, the two core rails are all straight lines, and the guide rails are connected to the head of the straight frog. The turnouts of this structure have short guide curves, The radius is small, so the lateral allowable passing speed is relatively slow. For example, the radius of the guide curve of No. 7 turnout of 50kg / m rail is 150m, and the lateral passing speed cannot be greater than 30km / h. This also affects the transportation efficiency.

Due to the above-mentioned technical defects, the existing three-turn turnouts have not been popularized and used, and have not even been included in the "Manual of Main Parameters of Commonly Used Turnouts"

Images