Liquid feeding system

Liquid feeding system

  • CN 1,737,372 B
  • Filed: 06/30/2005
  • Issued: 06/06/2012
  • Est. Priority Date: 07/01/2004
  • Status: Active Grant
First Claim
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1. liquid chromatograph, it sucks solution and discharge to discharge conduit from intake line, and the said solution that is injected with test portion is imported column casing, after separating through said column casing, utilizes detector that test portion is analyzed, it is characterized in that,Possess first pump and second pump and pressure transducer,Said first pump and second pump are configured between said intake line to said discharge conduit, respectively by motor driven,Said pressure transducer detects the head pressure of the said solution of discharging from said discharge conduit;

  • Said first pump possesses first plunger that in first pressurized chamber, moves back and forth as straight line motion;

    Said second pump possesses second plunger that in second pressurized chamber, moves back and forth as straight line motion;

    Second plunger of said second pump is arranged on the downstream side of first plunger of said first pump;

    Said liquid chromatograph also possesses moving valve, this moving valve can be said intake line being connected in said first pump with the primary importance of interdicting between said first pump and said second pump with blocking between said intake line and said first pump and with moving between the second place that is connected between said first pump and said second pump;

    In starting running, said moving valve is configured in the said second place, stop said second pump and only make said first pump action;

    When said head pressure arrives goal pressure, said moving valve is configured in said primary importance, stop said first pump and the steady running of said second pump that only turns round;

    By the test portion of said detector analysis through said column casing separation;

    The action flow of said second pump of action flow-rate ratio of said first pump is big.

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