Urea solution tank for SCR aftertreatment system

Abstract

The invention discloses a urea solution tank for an SCR aftertreatment system. The urea solution tank comprises a tank body. The tank body comprises at least one liquid injection port, at least one liquid discharging port and at least one liquid discharging valve group, wherein a tank cover for sealing the at least one liquid injection port is arranged on the at least one liquid injection port; the at least one liquid discharging port is arranged at the bottom of the tank body, and a liquid channel is arranged by enabling the at least one liquid discharging port to extend outwards; the at least one liquid discharging valve group is arranged in the liquid channel, every liquid discharging valve group comprises a valve body arranged in the liquid channel and a liquid discharging bolt movably arranged on the valve body, and the liquid discharging bolt is partially arranged in the liquid channel. By arranging the at least one liquid discharging valve group in the liquid channel of the at least one liquid discharging port, the liquid discharging bolts of the at least one liquid discharging valve group are not exposed outside the at least one liquid discharging port, collision of the liquid discharging bolts is effectively avoided, the liquid discharging bolts are prevented from being loosened or deformed, and the at least one liquid discharging port does not leak liquid.

Description

technical field [0001] The invention relates to a urea solution supply device for an aftertreatment system, in particular to a urea solution tank for an SCR aftertreatment system. Background technique [0002] At present, with the rapid development of motor vehicles, serious air pollution is produced, and the air pollution presents regional composite characteristics. The air pollution in many big cities has changed from soot-type pollution to combined soot and motor vehicle pollution, and a few megacities have clearly shown photochemical smog-type (ie, motor vehicle exhaust) air pollution. Therefore, the research on diesel vehicle exhaust emission pollution control technology is extremely important and urgent. [0003] From the perspective of the development of commercial vehicles, diesel engines are their main power. Generally, diesel vehicles using supercharging technology can meet the emission requirements of stage I, stage II adopts supercharged intercooling, stage III...

AI Technical Summary

Problems solved by technology

At present, the urea solution tank used for containing urea solution is provided with a discharge port, and a discharge valve group for opening or closing the discharge port is arranged at the discharge port. The discharge bolt on the discharge valve group protrudes from the discharge port. Therefore, during the use or handling of the urea solution tank, the drain bolt is easily bumped, resulting in loosening or deformation of the drain bolt, which in turn leads to leakage from the drain port of the urea solution tank

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