Test box for determining pulverized coal deposition change along with railway ballast depth

Abstract

The invention discloses a test box for determining pulverized coal deposition change along with railway ballast depth, and belongs to the technical field of the rail traffic test equipment. The invention provides a test box which is simple in structure, convenient to mount, and capable of determining pulverized coal deposition change along with the railway ballast depth. The technical scheme is asfollows: the test box comprises an upper cover, a box body and a base; the box body comprises multiple layers of screen boxes in vertical connection; each screen box comprises a tube wall and a screen plate; the screen plate is located at a bottom end of the tube wall, and the tube wall is hermetically connected with the screen plate; a jack for the entering and exiting of a plugboard is formed at the side of the screen plate; the bottom end of the tube wall at the lowest of the test box is hermetically connected with the base; in the test, the test box is fixed on a vibration table, the plugboard is inexistent in the jack, and the railway ballast macadam is placed in the screen box at each layer, and the pulverized coal and the railway ballast macadam are placed in the screen box at theuppermost, the vibration table is started, and the vibration table is closed after arriving the designated time, the plugboards are inserted in various jacks so as to weigh the residual pulverized coal in each screen box and on the base.

Description

technical field [0001] The invention discloses a test box for measuring the variation of coal powder deposition amount with ballast depth, belonging to the technical field of rail transit test equipment. Background technique [0002] In ballasted railway traffic, under the long-term vibration of the train load, the train will scatter a large amount of coal dust, and the non-sticky coal dust particles will gradually deposit downward along the intergranular gaps, and the grids are mostly buried in the The connection between crushed stone ballast and bottom ballast. In the long run, the reinforcement-soil interface is more susceptible to dirt damage, which limits the full play of the reinforcement performance, and causes hazards such as uneven ballast settlement on the ballast bed, seriously affecting railway safety. The study of the test chamber that reveals the variation of coal powder deposition with ballast depth can effectively explain the law of coal dust and other dirt ...

AI Technical Summary

Problems solved by technology

There is no such test chamber

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