▎ 摘　　要

NOVELTY - The system has a wheel shaft connected to a train vehicle chassis (110) and fixed with a wheel (130), where the wheel is rotated on a rail (160). A magnetic roller holder (510) is fixed far away from the wheel and connected to the train vehicle chassis. A magnetic roller (540) is connected with a holder. The magnetic roller touches the rail. The magnetic roller is provided with demagnetized portions (550). The holder is provided with a shock absorber (500) that is positioned between the train vehicle chassis and the magnetic roller, where the magnetic roller is coated with a graphene, a metal and a plastic and the magnetic roller is a dual magnetic roller. USE - Derailment and rollover prevention system for train vehicle e.g. train car such as caboose, coal car, passenger car, box car, refrigerated box, centerbeam car, covered hopper car, oil car, flat car, gondola car, intermodal equipment car, open-top hoipper car, tank car, subway car, well car and train trailer, locomotive (all claimed). ADVANTAGE - The system prevents derailment and rollover of trains to improve train safety, so as to protect people from injury and avoid damage to trains and the freight transported by trains. DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a derailment and rollover prevention system for train vehicle. 110Train vehicle chassis 130Wheel 160Rail 500Shock absorber 510Magnetic roller holder 540Magnetic roller 550Demagnetized portions