A locomotive sand spreader for self-cleaning fine sand

Abstract

The invention provides a locomotive sand scattering device capable of clearing fine sand grains automatically. An elastic air storage bag and self-clearing sand scattering and sand stirring air nozzles are added on the basis of an original sand scattering machine. When an air inlet of the sand scattering device is closed, the elastic air storage bag is used for balancing air pressure in an air inlet pipe and a cavity of the sand scattering device, and air in a sand scattering device body is prevented from backward flowing into a high-pressure air inlet pipe to a larger extent; the structure of the sand scattering air nozzle is special, an air return groove is designed in an outlet end of the sand scattering air nozzle; when air and dust in the cavity of the sand scattering device flow back into the high-pressure air inlet pipe, a part of dust can be retained in the air return groove due to the expansion effect of the air return groove, and accordingly, the amount of dust entering the high-pressure air inlet pipe is reduced. Besides, the inside of the sand scattering air nozzle is conical, so that the fine sand grains backwards sucked into the air inlet pipe can be accumulated at an air nozzle outlet along with air current when the sand scattering device is started again and can be discharged out of the high-pressure air inlet pipe smoothly as the air pressure is increased, and the sand scattering device has an automatic clearing function on the fine sand grains.

Description

technical field [0001] The invention relates to a sand spreader for a locomotive, in particular to a sand spreader for a locomotive which can automatically clean fine sand grains and is not blocked. Background technique [0002] The sand spreader is an important part of the locomotive. It increases the wheel-rail friction by sprinkling sand between the wheel set and the rail. It plays a very important role in the climbing, acceleration, and braking of the locomotive. The reduction of wheel-rail adhesion leads to idling of the locomotive wheels, ensuring the normal operation of the locomotive without stopping. [0003] At present, sand blockage of sand spreaders in China occurs from time to time, which greatly threatens the operation safety of locomotives. blockage, resulting in operational failure. The cleaning process of the sand spreader is cumbersome, time-consuming and labor-intensive, which greatly increases the workload of after-sales personnel. Therefore, solving t...

AI Technical Summary

Problems solved by technology

[0004] At the moment when the current sand spreader finishes sanding, the gas supply in the air inlet pipe is lost, but the high-pressure gas in the air inlet pipe will continue to flow forward rapidly, resulting in a decrease in the pressure near the inlet of the air inlet pipe, and even Negative pressure area appears, and the air pressure in the sand sprinkler cavity will be relatively large, which will easily cause the air flow to flow back into the air inlet pipe through the sand spreading and sand stirring nozzle, and the dust or fine sand particles mixed in the air flow will enter into the air inlet pipe. In the air duct, as the circulation increases, there is a risk of blockage of the nozzle of the sand sprinkler

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