Train end blocking device for air tightness test

Abstract

The invention discloses a train end blocking device for an air tightness test, and belongs to the field of passenger compartment end sealing devices for railway train air tightness tests. The device comprises a moving trolley, a supporting frame, a vertical adjusting frame, an air cylinder, two limiting bolts, a horizontal and pitching adjusting mechanism, a metal blocking plate, a coupler blocking box, two positive and negative pressure stop valves, and an electronically controlled safety valve. According to an end wall door frame blocking mechanism of the invention, the hanging exposed portion of the end portion of a coupler docking apparatus can be completely inserted into the interior of the coupler blocking box, and the inclination angle posture of a positioning mechanism of the blocking device is finely adjusted by using a ball head as a fulcrum, thereby completely blocking a door structure in the middle of an end wall by using the metal blocking plate, and smoothly performing the air tightness test of a train passenger compartment. The device has the advantages of high structural strength, good universality and airtight performance, long service life and the like.

Description

technical field [0001] The invention belongs to the field of passenger compartment end sealing devices for rail train airtightness tests, and in particular relates to a train end sealing device for airtightness tests. Background technique [0002] High-speed rail passenger cars such as EMUs have strict precision requirements for the air pressure control in the passenger compartment. Therefore, after the passenger compartment and the chassis floor are assembled, the doors, windows, air-conditioning interfaces and other parts of the compartment need to be sealed separately. blockage, so that the compartment above the floor forms a closed space, and uses a vacuum pump negative pressure system to extract the air in the closed space, when the difference between the actual vacuum in the compartment and the rated vacuum of the vacuum pump When it is less than the theoretical differential pressure index, it can be determined that the airtightness of the passenger compartment of the ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the air tightness test of the existing trains, the end wall door frame sealing plate is an integral plastic sealing plate with a card slot round hole, which is composed of upper and lower semicircular card slots. plate, the process of filling and sealing the gap between the round hole of the card slot and the outer diameter of the central tube is time-consuming, laborious, inefficient, and prone to the phenomenon of loose filling and air leakage; and the existing plastic plate structure It is relatively fragile, and is prone to cracks due to bumping or aging, resulting in a decrease in air tightness; Due to the technical problems of various types of blocking plates and poor versatility, the present invention provides a plugging device for the end of a train used in an air tightness test

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