Air dust filter device for control valve of railway truck

Abstract

The invention discloses an air dust filter device for a control valve of a railway truck. The air dust filter device is assembled in the control valve of the railway truck and comprises a sealing sleeve and an elongated channel type filter structure. The elongated channel type filter structure is enclosed by filter screens, the front end of the elongated channel type filter structure is connected with the sealing sleeve, an air inlet which is communicated with the insides of channels of the elongated channel type filter structure is formed in the sealing sleeve, the sealing sleeve can be hermetically connected with a body of the control valve by sealing elements, and air which flows into the air dust filter device from the air inlet of the sealing sleeve can be filtered by the elongated channel type filter structure and then flows into the control valve. The air dust filter device has the advantages that original filter screen structures are replaced by the channel type filter structure, accordingly, the filter area can be effectively enlarged, and the filter precision can be effectively improved; inner frameworks are omitted in the filter structure, accordingly, the air dust filter device is high in ventilation property and dirt holding quantity, is durable and can be used in severe environments, and the quality of air which flows into the control valve can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of railway vehicles, in particular to an air dust filter device for a control valve of a railway freight car. Background technique [0002] At present, the filter devices for air control valves of railway freight cars mostly use 60-80 mesh copper mesh or steel mesh to filter dust. Due to the harsh operating environment of railway freight cars in my country and the limited filtering effect of the dust filter, some air impurities and rust in each air cylinder can easily pass through the dust filter and enter the working surface of the brake valve slide valve pair, causing the slide valve Auxiliary strain leaks, or enters the air circuit of the brake valve to block the air circuit, which affects the performance of the brake valve. In addition, the water vapor in the pipeline gathers at the filter and is prone to rust. Contents of the invention [0003] The purpose of the present invention is to solve the ab...

AI Technical Summary

Problems solved by technology

Due to the harsh operating environment of railway freight cars in my country and the limited filtering effect of the dust filter, some air impurities and rust in each air cylinder can easily pass through the dust filter and enter the working surface of the brake valve slide valve pair, causing the slide valve Auxiliary strain leaks, or enters the air circuit of the brake valve to block the air circuit, which affects the performance of the brake valve. In addition, the water vapor in the pipeline gathers at the filter and is prone to rust.

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