Design Of Hydraulic System And Research On The Crucial Of Railway Crossing Safety Equipment

With the development of China’s electric power and railway construction,the situation of crossover between new power lines and existing railways is increasing.According to the relevant regulations,when the construction of power line crosses over the railway,the safety protection of the railway must be carried out and the consent of the railway management department must be obtained.At present,scaffolding and insulation protective network are commonly used for railway crossing protection.This method has complicated steps,long construction period and low safety.This paper studies the protection objects of overhead transmission lines crossing railways,analyses various protection schemes for crossing railways,and puts forward a new type of safety protection equipment for railway crossing according to the specific working conditions of railway crossing.According to the working condition of railway crossing safety protection equipment and referring to the hydraulic system of related engineering equipment,the hydraulic system that meets the requirements is designed.The main loops such as outrigger loop,rotary loop,main tower variable amplitude loop,beam variable amplitude loop and auxiliary tower variable amplitude loop are calculated and analyzed.The hydraulic components are selected and the complete hydraulic system design is completed.This paper analyzes and studies a variety of existing over-the-shelf protection schemes.Aiming at the typical working conditions of railway crossing,a new type of railway crossing safety protection scheme is proposed,and a set of railway crossing safety protection equipment suitable for this program is designed.According to the working condition of the railway crossing safety protection equipment and referring to the hydraulic system of the related engineering equipment,the hydraulic system that meets the requirements is designed.The main loops such as outrigger loop,rotary loop,main tower variable amplitude loop,beam variable amplitude loop and auxiliary tower variable amplitude loop are calculated and analyzed.The hydraulic components are selected and the complete hydraulic system design is completed.Aiming at the balance circuit in the hydraulic system of railway crossing safety protective equipment,taking the balance valve used in the main tower variable amplitude system as the research object,this paper analyses the working principle of the screw cartridge balance valve.Aiming at the situation that the load center of gravity crosses the revolving center when the variable amplitude cylinder works,the static equation is established and the simulation model of the balance circuit based on AMESim is constructed to simulate the hydraulic variable amplitude.The working process of the system is simulated,and the influence of the parameters of the balance valve on the dynamic performance of the balance circuit is studied.The stability of the balance circuit is verified,which provides a theoretical basis for the optimization of the balance valve.In this paper,aiming at the synchronous circuit in the hydraulic system of railway crossing safety protective equipment,the working conditions of two synchronous machines encountered in the practical use of crossing protective equipment are analyzed,and the necessity of applying the hydraulic synchronous control method is expounded.The synchronization control method of hydraulic system is introduced.Two optimal control methods are selected for detailed introduction and simulation with AMESim software.The synchronization accuracy of each method is calculated.The application of the two methods is determined by comparison.