Three-plunger high-pressure pump

A high-pressure pump and plunger technology, applied in the field of plunger pumps, can solve the problems of inconvenient disassembly, cleaning and replacement of one-way valves, high requirements for heat treatment of parts processing accuracy, complicated connection of liquid inlet and outlet pipelines, etc., and achieves convenient disassembly. Cleaning and replacement, low cost, low pulsation effect

Inactive Publication Date: 2013-12-04
LISUI TECH SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has relatively high requirements on the processing accuracy and heat treatment of the parts, and the processing difficulty is relatively large.
In addition, the connection of the inlet and outlet pipelines is complicated, and the check valve is inconvenient to disassemble, clean and replace

Method used

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Embodiment Construction

[0016] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0017] Such as Figure 1 to Figure 5 As shown, a three-plunger high-pressure pump includes a housing 1 and a pump body 2. An eccentric shaft 3 driven by a power mechanism is installed in the housing 1. Three eccentric wheels 4 are arranged on the eccentric shaft 3. The phase difference between the three eccentric wheels 4 is 120°, the pump body 2 is provided with a pump chamber 5 and three cylinder chambers 6, the three cylinder chambers 6 are arranged in parallel, and each cylinder chamber 6 is provided with There is a plunger rod 7, three plunger rods 7 extend into the pump chamber 5, the left end of each of the plunger rods 7 is provided with ...

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Abstract

The invention relates to a three-plunger high-pressure pump, which comprises a shell and a pump body, wherein an eccentric shaft is arranged in the shell; the eccentric shaft is provided with three eccentric wheels; the phase differences among the three eccentric wheels are 120 degrees; a pump chamber and three cylinder cavities are formed in the pump body; the three cylinder cavities are formed in parallel; a plunger rod is arranged in each cylinder cavity; the three plunger rods extend into the pump chamber; the left end of each plunger rod is provided with a plunger guide sleeve; the left end of each cylinder cavity is provided with a compression spring; the compression spring is sleeved on the outer wall of the plunger guide sleeve; a carrier rod is arranged between each plunger guide sleeve and each eccentric wheel; the eccentric wheels act on the carrier rods; the carrier rods act on the plunger guide sleeve and the plunger rods; the right end of the pump body is provided with a one-way valve mounting plate; and the one-way valve mounting plate is provided with a flow phase inlet one-way valve assembly and a flow phase outlet one-way valve assembly. The three-plunger high-pressure pump has the advantages of simple structure, simple machining process, low cost, small pulsation, long service life, stable and accurate flow and convenience in disassembling, assembling, cleaning and replacing a one-way valve.

Description

technical field [0001] The invention relates to a plunger pump, in particular to a three-plunger high-pressure pump used in liquid chromatography analysis. Background technique [0002] Liquid chromatography is a chromatography that uses liquid as the mobile phase, and is a means of separation and analysis of mixtures. High-pressure pumps used in HPLC analysis require high output pressure, small pulsation, and precise flow. At present, most high-pressure pumps used in high-performance liquid chromatography adopt the following structure: a stepping motor drives two cams with a phase difference of 180° to rotate, and the two cams alternately drive two sapphire piston rods to reciprocate to complete the suction of the mobile phase Compared with pressing out, the resulting pulsation is smaller. However, this method has relatively high requirements on the processing accuracy and heat treatment of the parts, and the processing difficulty is also relatively large. In addition, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B9/04F04B53/00
Inventor 周胜张彦辉邹学文
Owner LISUI TECH SUZHOU
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