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An adjustable infusion pump pulsation damper

A technology of pulsation damper and infusion pump, which is applied to variable capacity pump components, liquid fuel engines, pump components, etc., can solve the problems of complex device and high cost, and achieve the effect of improving sealing and reducing cost.

Active Publication Date: 2020-12-22
DALIAN ELITE ANALYTICAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the device is complicated and the cost is high

Method used

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  • An adjustable infusion pump pulsation damper
  • An adjustable infusion pump pulsation damper
  • An adjustable infusion pump pulsation damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]Such asFigure 1-4Shown is an adjustable infusion pump pulsation damper, including an upper cover 1, an elastic diaphragm 3, a body 2 and an adjusting device 4. The upper cover 1 and the body 2 are cylindrical. Normally, the diameter of the upper cover 1 is set to be slightly smaller than the diameter of the body 2, the height of the upper cover 1 is set to be smaller than the height of the body 2, and the upper cover 1 and the body 2 The shape of is not limited to cylindrical shape. The upper cover 1 and the main body 2 overlap and are in contact with each other in axis. Normally, the two are closely attached to each other to compress the elastic diaphragm 3, and the upper cover 1 and the main body 2 are fixedly connected.

[0040]The fixed connection of the upper cover 1 and the main body 2 is bolt connection. A threaded through hole 12 is axially provided on the outer side of the upper cover 1, and the threaded through hole 12 is provided at least two, and further, eight. The t...

Embodiment 2

[0052]Such asFigure 5 As shown, the difference between this embodiment and Embodiment 1 is that the adjustment device 4 is configured as a micrometer head 41, which includes a sleeve and a screw, and the sleeve is fixedly connected to the second inner cavity 8 away from the upper cover 1 side.

[0053]When in use, the adjustment device 4 can be rotated according to the actual conditions of pulsation and pressure to accurately adjust the deformation amount of the elastic member 11.

Embodiment 3

[0055]Such asFigure 1-4Shown is an adjustable infusion pump pulsation damper, including an upper cover 1, an elastic diaphragm 3, a body 2 and an adjusting device 4. The upper cover 1 and the body 2 are cylindrical. Normally, the diameter of the upper cover 1 is set to be slightly smaller than the diameter of the body 2, the height of the upper cover 1 is set to be smaller than the height of the body 2, and the upper cover 1 and the body 2 The shape of is not limited to cylindrical shape. The upper cover 1 and the main body 2 overlap and are in contact with each other in axis. Normally, the two are closely attached to each other to compress the elastic diaphragm 3, and the upper cover 1 and the main body 2 are fixedly connected.

[0056]The fixed connection of the upper cover 1 and the main body 2 is bolt connection. A threaded through hole 12 is axially provided on the outer side of the upper cover 1, and the threaded through hole 12 is provided at least two, and further, eight. The t...

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PUM

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Abstract

The invention discloses an adjustable infusion pump pulsation damper, and relates to a pulsation damper. The adjustable infusion pump pulsation damper comprises an upper cover, an elastic diaphragm, abody and an adjusting device, wherein a flow path connecting opening, a circular groove and a through hole are formed in the upper cover; an upper positioning pad, a lower positioning pad and an elastic part are arranged in the body, and the adjusting device is arranged in contact with the lower positioning pad so as to adjust the deformation quantity of the elastic part; when the pulsation causes flow to rise, the elastic diaphragm is pressed and deforms downward to press the elastic part, and the volume of an inner flow path cavity expands to store part of excess liquid; when the pulsation causes the flow to reduce, the elastic part is restored to extrude the elastic diaphragm so as to enable the volume of the inner flow path cavity to be reduced to supplement part of insufficient liquid, so that the purpose of relieving the flow pulsation is achieved. According to the adjustable infusion pump pulsation damper, the pulsation relieving range is adjustable, the sealing performance is good, the elastic diaphragm can be replaced, the structure is simple, and the cost is low.

Description

Technical field[0001]The invention relates to a pulsation damper, in particular to an adjustable infusion pump pulsation damper.Background technique[0002]High-performance liquid chromatography infusion pumps capable of continuous infusion often adopt a series or parallel reciprocating plunger pump structure. The plunger often produces flow pulsation during the alternating movement of the plunger in the pump cavity. For the chromatographic analysis process, the stability of the flow will affect the repeatability of the separation results. Repeatability is also called reproducibility, which is generally the relative standard deviation of the results obtained by performing the same test under the same conditions. For the liquid chromatography system, the flow is unstable, the separation process is difficult to stabilize, and the reproducibility of the obtained chromatographic separation results is low, which makes the relative standard deviation larger. Therefore, it is necessary to el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B11/00F04B53/00F04B53/22F16F15/08
CPCF04B11/0091F04B53/00F04B53/22F16F15/085
Inventor 唐涛杨三东董智勇杜福新李彤
Owner DALIAN ELITE ANALYTICAL INSTR
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