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Liquid feeding system

A liquid chromatography and solution technology, which is applied in liquid fuel engines, liquid variable displacement machines, solid adsorbent liquid separation, etc., to achieve the effect of shortening the rise time

Active Publication Date: 2012-06-06
HITACHI HIGH-TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the pump has a long rise time when starting

Method used

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  • Liquid feeding system
  • Liquid feeding system
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Examples

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Embodiment Construction

[0026] One embodiment of the present invention will be described below with reference to the drawings.

[0027] figure 1 and figure 2 is a liquid chromatograph device using the liquid delivery system of the present invention. The liquid chromatography device has a liquid delivery system, an injector 53 , a cartridge 54 , a detector 55 and a storage tank 56 . The liquid delivery system of the present invention is to deliver liquid at a very low flow rate of, for example, 0.1 nL (nanoliter) / min to 50 μL (microliter) / min to the cartridge 54 .

[0028] The liquid delivery system of this example has a storage tank 51 for storing eluent or solvent, a degasser (getter) 14 for removing gas in the liquid, an active valve 5 with four ports, a column with two plungers The plug pump device 1 , the direct acting device (actuator) 122 , 222 connected with the plunger, the motor 121 , 221 driving the direct acting device, and the controller 50 controlling the motor 121 , 221 and the mov...

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Abstract

The present invention provides a chromatograph device capable of reducing the raising time of a pump. The chromatograph device has the first and second pumps each of which is provided with a plunger, the inlet port and the discharging port. Liquid sucked through each of the pump suction ports is discharged out of the discharging port through the first pump and / or second pump. Under the starting operation mode, the second pump is stopped and only the first pump is operated. When the discharging pressure at the discharging port reaches up to a predetermined value, the starting operation mode is changed over to the normal operation mode. Under the normal operation mode, the first pump is stopped and only the second pump is operated.

Description

technical field [0001] The present invention relates to a liquid chromatograph device suitable for low-flow liquid delivery, and more particularly to a liquid chromatograph device suitable for use in a liquid chromatograph. Background technique [0002] Pumps for liquid chromatography are generally plunger pumps with two plungers. Such a plunger pump uses two motors to independently drive two plungers, and reduces flow pulsation through coordinated driving of the two plungers. [0003] In the example described in Japanese Patent Application Laid-Open No. 63-75375, the second plunger also performs one reciprocation while the first plunger is reciprocating, and the suction action of the first plunger by the action of the second plunger is The resulting flow pulsation is corrected. That is, the first plunger determines the liquid delivery flow rate, and the second plunger is used to correct the pulsation of the first plunger. [0004] [Patent Document 1] JP-A-63-75375 [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06F04B9/02
CPCG01N2030/326F04B11/0058F04B11/0083F04B53/06G01N30/32F04B13/00B01D15/14F04B13/02B01D15/166
Inventor 高尾邦彦加地弘典伊藤正人
Owner HITACHI HIGH-TECH CORP