Airtight test equipment for sand box of 350-kilometer motor train unit

Abstract

The invention discloses airtight test equipment for a sand box of a 350-kilometer motor train unit. The airtight test equipment comprises an equipment frame, an air cylinder hand rotating valve is mounted on the side wall of the equipment frame, a handle and a first air pipe are installed on the air cylinder hand rotating valve, and the other end of the first air pipe is fixedly connected to the two ends of the bottom of the large-stroke air cylinder. The output end of the large-stroke air cylinder penetrates through the top end of the equipment frame and is fixedly connected with a push plate, the other end of the push plate is fixedly connected with an adding block, an inserting groove is formed in the other end of the adding block, anti-disengaging bolts are connected to the two side walls of the inserting groove in an engaged mode correspondingly, and a sliding way is fixedly connected to the inner side wall of the equipment frame. According to the airtight test equipment for the sand box of the 350-kilometer motor train unit, the air tightness of the sand box is observed through the bubbles, water resources are saved, waste is avoided, meanwhile, air tightness test pressure maintaining only needs 3 min, the test efficiency is improved, tiny leakage points can be displayed in a bubble mode, and the purposes of facilitating observation, avoiding missing detection and improving the product quality are achieved.

Description

technical field [0001] The invention relates to the technical field of the airtightness of the sand box of a train set, in particular to an airtight test equipment for a sand box of a train set with a distance of 350 kilometers. Background technique [0002] The sand box is used in the construction of steel pipe pile support cast-in-place beams for unloading purposes. After the steel pipe pile support Bailey beam is erected, the construction of the cast-in-place beam begins. After the cast-in-place beam construction is completed, the support needs to be removed. At this time, it is very difficult Remove the support, because the weight of the beam body is all pressed on the support, it is not easy to remove the support, which requires us to set up a sand box between the steel pipe pile and the distribution beam in advance, and the sand box It acts as a jack. When the 350-kilometer EMU sandbox is used in train operation, there will be pressure inside to ensure the sand in the ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide 350-kilometer EMU sand box airtight test equipment, to solve the hydraulic test equipment method proposed in the above-mentioned background technology, the water injection time is long, the efficiency is low, and the water consumption of the equipment is large, and it is difficult to recycle, resulting in Water resources are wasted, and the slight leakage and water seepage on the surface of the hydraulic test box are not easy to be found

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