Anti-overfilling urea box

Abstract

The invention discloses an anti-overfilling urea box which comprises a box body. A filling opening is arranged on the top of the box body; a rated full position is arranged in the box body; expand space is formed between the rated full position and the top of the box body; a filling barrel extends from the filling opening; and the highest position of an output opening of the filling barrel and the rated full position of the box body are positioned on the same horizontal position. Accordingly, the filling barrel which extends into the box body extends from the filling opening, the highest position of the output opening of the filling barrel and the rated full position of the box body are positioned on the same horizontal position, so that the expand space in the box body is closed when the output opening of the filling barrel is blocked by urea liquor, new urea liquor cannot be filled in the box body, the level of the urea liquor in the box body cannot exceed the rated full position, enough space is provided for crystallization expansion of the urea liquor, the phenomenon that the box body is expanded and even is broken is stopped, and the anti-overfilling urea box brings convenience for users during use.

Description

technical field [0001] The invention relates to the technology in the field of urea tanks, in particular to a urea tank for preventing overfilling. Background technique [0002] Diesel engines have been widely used in various industries around the world due to their high thermal efficiency and low exhaust emissions, but their high nitrogen oxide emissions have always been a problem that plagues people. Since the 1990s, as countries around the world have increasingly stringent regulations on fuel (gas) vehicle engine emissions, one of the methods used by engine manufacturers to meet emission standards is to use selective catalytic reduction (SCR system) catalysts to reduce Nitrogen oxides in the engine exhaust flow, which can reduce the emission of nitrogen oxides by injecting a certain amount of urea solution into the exhaust gas to chemically react with nitrogen oxides (NOx) in the exhaust gas. [0003] On the premise that the emission regulations are not fully implemented...

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Problems solved by technology

[0007] In view of this, the present invention aims at the deficiencies existing in the prior art, and its main purpose is to provide a urea solution tank that prevents overfilling, which not only solves the problem of manual filling and prevents overfilling, but also meets the requirements of automatic filling. The function effectively solves the problem that the expanded volume in the urea tank is not enough to store crystallized urea due to overfilling, which causes the urea tank to swell or even burst

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