Dosing pump unit

Dosing pump unit

  • CN 101,091,040 A
  • Filed: 12/29/2005
  • Published: 12/19/2007
  • Est. Priority Date: 12/30/2004
  • Status: Active Application
First Claim
Patent Images

1. , a kind of dosing pump assembly, be used for liquid reducing agent being mixed into exhaust flow by metering pump (2), the input side of this metering pump (2) is connected with the adapter that is connected to reducing agent case (4), the outlet side of this metering pump (2) and pressure piping (16) and the reflux line (10) that leads to this reducing agent case (4) are connected, it is characterized in that:

  • go up at this pressure piping (16) safety check (20) that overcomes the hydrodynamic pressure bias voltage that is produced by this metering pump (2) is set, this reflux line (10) is connected with this pressure piping (16) at this safety check (20) before along the flow direction of reducing agent, and this reflux line (10) is provided with first stop valve (12) of optionally closing this reflux line (10).

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