An adsorption double-tower drying device

Abstract

The invention relates to an adsorption double-tower drying device, which comprises: two drying towers, a solenoid valve, and a reversing valve; the solenoid valve is a three-position five-way pilot solenoid valve, which has an air inlet connected to the air outlet of the drying tower, Two air outlets, and two discharge ports connected to the atmosphere; the reversing valve is a three-position five-way pilot pneumatic reversing valve, which has an air inlet connected to the compressed air source, and two air inlets connected to the two drying towers respectively. The gas outlet connected to the gas port, two pilot pressure input ports connected to the gas outlet of the solenoid valve, and two discharge ports connected to the atmosphere; the gas outlets of the two drying towers are respectively connected to the minimum pressure valve and the solenoid valve after passing through the check valve The air inlet of the two drying towers is connected through an independent air passage equipped with a throttle valve. The combination of solenoid valve and pneumatic reversing valve is used to switch the gas path between the drying towers, so that the two towers are in different working states and can be easily switched.

Description

technical field [0001] The invention relates to an adsorption-type double-tower drying device, which is particularly suitable for drying rail transit air sources and belongs to the technical field of rail vehicle air source drying. Background technique [0002] The compressed air output by the air compressor contains high moisture, oil and mechanical impurities. If it is not removed, it will cause corrosion, blockage, condensation, ice and other phenomena in the braking system of railway vehicles, which will cause train braking failure. Therefore, compressed air must be dried and filtered to meet the air quality requirements for train braking. In order to realize uninterrupted gas supply to downstream gas equipment, almost all adsorption drying devices are designed with a double-tower structure. Carry out regeneration operation, after a certain period of time, the working conditions of the two towers will be automatically switched. [0003] Limited by the control method an...

AI Technical Summary

Problems solved by technology

This method is not conducive to the compactness of the structure, takes up a lot of space, and has high costs. The exposed connecting pipelines also have great hidden dangers in use, maintenance and safety assurance.

In particular, the components are interconnected in structure and cannot be replaced independently. This is a great challenge in the rail transit industry that emphasizes fast, safe, and easy maintenance.

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