Urea solution supply system and method used for SCR (selective catalytic reduction) system anti-crystallization and pump suction unit
A solution supply and pumping technology, applied in engine components, exhaust treatment, mechanical equipment, etc., can solve problems such as clogging and reduce the risk of clogging
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[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0035] Please refer to figure 1 , the present invention provides a pumping unit 1 for absorbing urea solution, temporarily storing urea solution and discharging urea solution, including interconnected pumping check valves 11 and driving pumping check valves in order from bottom to top 11 working drive units.
[0036]The pumping check valve 11 is composed of a check valve upper body 118 and a check valve lower body 111. The end of the check valve lower body 111 away from the check valve upper body 118 is provided with a first liquid inlet communicating with the outside world. hole 112 and the first liquid outlet hole 113, the end of the check valve upper body 118 away from the check valve lower body 111 is provided with a hydraulic str...
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