QC Research of Rail Nondestructive Reinforcement Equipment

QC Research of Rail Nondestructive Reinforcement Equipment

As an important part of guiding the operation of vehicles in crane rail square steel transit, crane rail square steel is affected by factors such as rolling process during production, bumping during transportation, fatigue wear during operation and rail welding joints, which are prone to minor or even serious injuries, causing them to break in winter. The chances of the crane rail square steel beaks are greatly increased, which affects railway transportation and even jeopardizes driving safety. In order to eliminate the safety hazards caused by lightly injured crane rail square steel, it is necessary to reinforce them. The traditional crane rail square steel reinforcement equipment mainly includes bulge splints. In recent years, with the development of high-speed railways and heavy-duty railways, the bulging cleats that cause additional damage to the rails cannot meet the demand, it is necessary to use rail non-destructive reinforcement equipment. The existing rail non-destructive reinforcement equipment consists of a splint, a splint locking device and a cement. The locking device includes positioning plate, bottom plate, bolt, nuts, etc. The bottom plate of the locking device is inserted laterally into the bottom of the rail, and the lower part of the positioning plate is connected to the bottom plate by vertical bolts. The inner side of the clamping plate is bonded to the crane rail square steel by a cementing agent, and the outer side of the clamping plate is fixed by a transverse bolt on the positioning plate.

In view of the complicated structure of the locking device and the excessive bolting, the group proposed to replace the locking device in the non-destructive reinforcing device with a simple elastic clamping structure. The elastic clamping has two solutions, namely the elastic elastic clamp and the plate elastic folder. Install 6 elastic clips for each set of reinforcement equipment. For the elastic clamp structure, the group members used the finite element software to establish an analytical model, from the perspective of ensuring the structural strength, providing effective clamping force, and simultaneously combining the outer dimensions of the splint. After several trials and analyses, the reasonable elastic clamp size was determined. And the design drawings were finished. Abandon the complicated bolt locking device of the existing equipment, and use the elastic clamp to fasten the locking clamp. The structure is simple. The fastening force provided by the elastic clamp is constant, the reinforcement effect is stable and reliable, and the oiling and re-tightening can be avoided regularly. Post-maintenance maintenance workload can be reduced. After commissioning the factory to complete the processing of the elastic clamp, in order to verify whether the clamping force of the elastic clamp meets the design requirements, the panel members carried out the test of the clamping force for the elastic clamp. The team members randomly selected three sets of elastic clips, and carried out the clamping force measurement on the tensile testing machine. The surface of the test results, the clamping force of the three sets of elastic clips all met the design requirements. The clamping force of the elastic clamp meets the design requirements, and the clamping plate can be firmly locked on the rail to ensure the reinforcing effect. After the locking device is changed to the elastic clamp structure, in order to ensure the matching of the elastic clamp and the clamping plate, it is necessary to optimize the existing clamping plate structure. After repeated discussion, the panelists decide to add circular arc protrusions structure at the contact portion between the clamping plate and the elastic clamp. The splint is provided with a convex mechanism, which can be matched with the elastic clamp structure, and has a narrow upper and a lower width, and forms an effective constraint between the splint and the elastic clamp to prevent the elastic clamp from falling due to the train load, thereby affecting the driving safety. The surface of the elastic clip and the splint is classically sprayed, and the structure is beautiful, and the rust is effectively prevented.