Electromagnetic valve for urban rail vehicle gas circuit control system

Abstract

The invention discloses an electromagnetic valve for an urban rail vehicle gas circuit control system. The electromagnetic valve comprises a valve seat, a main body connected to the upper end of the valve seat and an end cover arranged at the bottom end of the valve seat, wherein an input cavity and an output cavity are formed in the valve seat, an exhaust cavity used for communicating the input cavity with the output cavity is formed in the valve seat, a valve element is arranged at the position, at one end of the exhaust cavity, of the valve seat, a valve sealing gasket is arranged at the lower end of the valve element and installed in a valve inner hole to form a valve assembly, a valve spring is arranged at the lower end of the valve assembly, a valve element vent hole communicated with an air source is formed in the valve element, and a nut is embedded in the valve seat; and an armature is arranged at the position, at the upper end of the valve element, of the main body, a springis arranged on the armature, and a screw used for being fixedly connected with the nut is arranged on the main body. The valve seat disclosed by the invention is of an equal-wall structure, shrinkagedeformation of the valve seat during injection molding can be avoided, the number of parts can be reduced, the product cost is reduced, the production efficiency is improved, and the electromagnetic valve is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of vehicle valve bodies, in particular to a solenoid valve for an air circuit control system of an urban rail vehicle. Background technique [0002] With the rapid development of my country's high-speed railways, the frequency of use of rail vehicles continues to increase, and the running time increases. In order to ensure the safety and reliability of the operation of rail vehicles, higher requirements are put forward for the quality of relevant key components. [0003] At present, the solenoid valves used in urban rail vehicles are connected by self-tapping screws between the main body and the valve seat, and are screwed into the plastic holes of the valve seat by self-tapping screws (see Figure 9 ), this structure is not conducive to disassembly and assembly, repeated disassembly and assembly several times, the plastic thread formed by the self-tapping screw on the valve seat will be damaged, there is an ...

AI Technical Summary

Problems solved by technology

[0003] At present, the solenoid valves used in urban rail vehicles are connected by self-tapping screws between the main body and the valve seat, and are screwed into the plastic holes of the valve seat by self-tapping screws (see Figure 9 ), this structure is not conducive to disassembly and assembly, repeated disassembly and assembly several times, the plastic thread formed by self-tapping screws on the valve seat will be damaged, there is an unreliable connection between the main body and the valve seat, and the valve seat is scrapped

Second, the valve seat is plastic injection molding, and the valve seat parts are equipped with thinning process holes to avoid shrinkage deformation, and the process holes are added (see Figure 8 ), and then it is necessary to increase the structure of plugs, sealing rings and stop pin parts to ensure the sealing of the process hole, so the assembly is labor-intensive, time-consuming, high in cost, and low in production efficiency.

Third, the metal bracket in the main structure is fully enclosed by plastic in the plastic shell, which is not conducive to the heat dissipation of the solenoid valve, which may easily cause the solenoid valve to burn or reduce its performance.

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