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Liquid distribution valve and liquid chromatographic pump equipped with same

A liquid chromatography and parallel technology, which is applied in the field of liquid chromatography pumps, can solve the problems of scattered space layout of connecting pipelines, difficult design of auxiliary cams, and difficulties in industrial design, etc., to achieve reasonable structural space layout, simple structure, and space occupation small effect

Active Publication Date: 2013-09-11
BEIJING PURKINJE GENERAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in this kind of 180° double-cam liquid chromatography pump, in addition to the difficulty in designing and trimming the main and auxiliary cams, there are also scattered spatial layouts of the connecting pipelines, difficulties in industrial design, and the overall volume of the pump. A series of defects

Method used

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  • Liquid distribution valve and liquid chromatographic pump equipped with same
  • Liquid distribution valve and liquid chromatographic pump equipped with same
  • Liquid distribution valve and liquid chromatographic pump equipped with same

Examples

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Embodiment 2

[0044] Such as Figure 5 Shown, the second embodiment of the liquid distribution valve of the present invention, its structure and Figure 4A with Figure 4B The structural difference of the first embodiment shown is that each working unit is provided with four ports 13 , and the four ports 13 are arranged symmetrically on both sides of the center line of the liquid inlet 11 and the liquid outlet 12 . The rest of the same parts will not be repeated. The liquid circuit distribution valve of the second embodiment can be used in four series and two parallel liquid chromatography pumps.

[0045] In the liquid channel distribution valve of the present invention, the number of working units is not limited to two, which can be related to the number of groups of reciprocating liquid feeding mechanisms that work sequentially (that is, work in parallel) in the matching liquid chromatography pump. A group of reciprocating liquid delivery mechanisms work sequentially, that is, the so-c...

Embodiment 1

[0046] Liquid Chromatography Pump Example 1: Two Series Two Parallel Liquid Chromatography Pumps

[0047] There are two sets of reciprocating liquid delivery mechanisms working sequentially in the two series and two parallel liquid chromatography pumps. Each set of reciprocating liquid delivery mechanisms includes two reciprocating liquid delivery mechanisms that work synchronously at the same time, and the two reciprocating liquid delivery mechanisms that work synchronously The matching two pump chambers also work synchronously at the same time.

[0048] Such as Figure 6A with Figure 6B As shown, the embodiment of the two-series and two-parallel liquid chromatography pump of the present invention includes a pump body 10, a cam 61 and four reciprocating liquid delivery mechanisms. Wherein, the plunger cleaning head 20, the pump head 65 and the liquid distribution valve 30 of the present invention are sequentially installed at the front end of the pump body 10. Cam 61 is i...

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Abstract

A liquid path distributing valve comprises a valve body (1) which is provided with at least two work units. Each work unit comprises one liquid inlet (11), one liquid outlet (12) and at least two interfaces (13). The liquid inlet (11), the liquid outlet (12) and the at least two interfaces communicate with each other in the valve body (1). Each liquid inlet (11) and each liquid outlet (12) are internally fitted with one check valve (2), respectively. A liquid-phase chromatographic pump with the above-mentioned liquid path distributing valve is also disclosed. The liquid path distributing valve has a simple structure and is convenient for use; and the liquid phase chromatographic pump can effectively increase the liquid feeding amount.

Description

technical field [0001] The invention relates to a liquid path distribution valve and a liquid chromatography pump equipped with the liquid path distribution valve. Background technique [0002] The liquid chromatographic pump is one of the important components of the liquid chromatograph, and its performance directly affects the stability, repeatability and accuracy of the analysis. At present, the liquid chromatography pumps used for liquid chromatography mainly include 180° single-cam parallel liquid chromatography pumps, 120° single-cam parallel liquid chromatography pumps and 180° double-cam liquid chromatography pumps. [0003] Such as figure 1 As shown, the 180° single-cam parallel liquid chromatography pump includes a cam 51 mounted on a camshaft 50 , two reciprocating liquid delivery mechanisms and two pump heads 55 symmetrically mounted on both sides of the cam 51 . Wherein the reciprocating liquid delivery mechanism includes a plunger push rod 53 supported on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B53/10F04B1/16
CPCG01N2030/326G01N30/32F04B1/053F04B1/128F04B1/14F04B9/042
Inventor 陆振宇赵培荣万雪梅
Owner BEIJING PURKINJE GENERAL INSTR
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