Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Series-parallel connection liquid chromatogram pump

A liquid chromatography and parallel technology, applied in the field of series-parallel liquid chromatography pumps, can solve the problems of poor liquid pressure stability, difficult cam design, complex cam structure, etc., and achieves easy trimming, reduced industrial design difficulty, and simple cam curve. Effect

Active Publication Date: 2011-05-11
BEIJING PURKINJE GENERAL INSTR
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The invention aims to solve the technical problems that the design of the cam in the existing liquid chromatography pump is difficult, the cam structure is complicated, the processing is difficult, and the stability of the liquid pressure is poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Series-parallel connection liquid chromatogram pump
  • Series-parallel connection liquid chromatogram pump
  • Series-parallel connection liquid chromatogram pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Definition of terms involved in the present invention:

[0045] The "series" in the series-parallel liquid chromatography pump refers to the simultaneous operation of multiple reciprocating liquid chromatographic pumps, which helps increase the pump displacement; the "parallel" refers to the sequential working of multiple reciprocating liquid chromatographic pumps. To ensure that the pump can continuously supply liquid to the system.

[0046] Such as Figure 4 , Figure 8 As shown, the cam 61 in the series-parallel liquid chromatography pump of the present invention is an end face cam, and its cam curve is set on the other end face opposite to the end face with the cam shaft 60. Each curve includes at least two curve units, and each curve unit includes an ascending curve that can convert the rotational movement of the cam 61 into a uniform linear movement of the plunger 69, a descending curve that returns the plunger 69 to its original position, and a connecting ascending c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a series-parallel connection liquid chromatogram pump which comprises a cam with a cam shaft, a pump head, at least four sets of reciprocating liquid feeding mechanisms and a cam drive mechanism, wherein the cam is an end face cam, a cam curve comprises 2-5 curve units, and each curve unit comprises a raising curve and a decline curve. Leads r of the raising curve and the decline curve are equal to 4v / mnpiD2, the lead angle corresponding to the raising curve and the drop angle corresponding to the decline curve meet the condition: m(x+y)=360 DEG, wherein v expresses thecapacity of the pump, D expresses the quantity of plungers and is an integer more than or equal to 4, and m expresses the quantity of the curve units and is an integer more than or equal to 2. The atleast four sets of reciprocating liquid feeding mechanisms are arranged at one side of the cam with the cam curves. A supporting roller is shaped as a cone frustum, and ratios of circumferences of any two cross sections of the supporting roller to the circumference of the cam curves at corresponding positions are equal. The invention has the advantages of simple structure, easy design processing and good hydraulic pressure stability.

Description

Technical field [0001] The invention relates to a series-parallel liquid chromatograph pump used for a liquid chromatograph. Background technique [0002] The liquid chromatography 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, liquid chromatography pumps used in liquid chromatographs mainly include 180° single cam parallel liquid chromatography pump, 120° single cam parallel liquid chromatography pump and 180° double cam liquid chromatography pump. [0003] Such as figure 1 As shown, the 180° single-cam parallel liquid chromatography pump includes a cam 51 mounted on the cam shaft 50, two sets of reciprocating liquid feeding mechanisms symmetrically mounted on both sides of the cam 51, and two pump heads 55. The reciprocating liquid feeding mechanism includes a plunger push rod 53 supported by a bearing (not shown in the figure) on the housing (not sho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F04B9/04G01N30/36
CPCG01N30/32F04B9/04G01N2030/326
Inventor 陆振宇
Owner BEIJING PURKINJE GENERAL INSTR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com