Mechanical pump type SCR urea spraying system
A technology of urea injection system and mechanical pump, which is applied in the direction of mechanical equipment, injection device, liquid injection device, etc. It can solve the problems of affecting the accuracy of injection metering, consuming electric energy of vehicles, and being unable to adjust, so as to avoid energy waste and reduce energy loss , the effect of easy maintenance
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[0012] The present invention will be further described below in conjunction with the drawings and embodiments: figure 1 As shown, a mechanical pump SCR urea injection system consists of a urea tank 10, a urea tank switching valve 12, a filter 13, a urea pump 14, an accumulator 17, a urea nozzle 16, a heat exchanger 15, and a pressure regulating valve 18. , Cooling device 22, electronic control unit 23, its characteristics are: the urea pump 14 is a mechanical pump, the diesel engine driving pulley 8 drives the drive shaft of the urea pump 14 through the pulley 9; the urea cooling device 24 is driven by the cooling device 22, the temperature control valve 20. The coolant inlet pipe 19 and the coolant outlet pipe 21 are composed. The urea cooling device 24 is arranged between the pressure regulating valve 18 and the switch valve 1 of the main line, and the accumulator 17 is placed at the outlet of the urea nozzle 16 and the pressure regulating valve 18. In the pipeline between; t...
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