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Adjustable infusion pump pulsation damper

A technology of pulsation damper and infusion pump, which is applied in variable capacity pump components, liquid fuel engines, pump components, etc. It can solve the problems of complex devices and high costs, and achieve the effect of improving sealing performance and reducing costs

Active Publication Date: 2019-11-08
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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  • Adjustable infusion pump pulsation damper
  • Adjustable infusion pump pulsation damper
  • Adjustable infusion pump pulsation damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like Figure 1-4Shown is an adjustable infusion pump pulsation damper, including an upper cover 1 , an elastic diaphragm 3 , a body 2 and an adjustment device 4 . The upper cover 1 and the body 2 are cylindrical, and generally, the diameter of the upper cover 1 is set to be slightly smaller than the diameter of the body 2, and 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 is not limited to cylindrical shape. The axes of the upper cover 1 and the main body 2 are coincident and in contact with each other. Usually, they are closely attached to each other to compress the elastic diaphragm 3. The upper cover 1 and the main body 2 are fixedly connected.

[0041] The fixed connection method of the upper cover 1 and the main body 2 is bolted connection. There are threaded through-holes 12 arranged axially on the outer side of the upper cover 1 , and there are at least two threaded through-hol...

Embodiment 2

[0053] like Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the adjustment device 4 is set as a micrometer head 41 , including a sleeve and a screw, and the sleeve is fixedly connected to the side of the second inner chamber 8 away from the upper cover 1 .

[0054] During use, the adjustment device 4 can be rotated according to the actual situation of pulsation and pressure to precisely adjust the deformation of the elastic member 11 .

Embodiment 3

[0056] like Figure 1-4 Shown is an adjustable infusion pump pulsation damper, including an upper cover 1 , an elastic diaphragm 3 , a body 2 and an adjustment device 4 . The upper cover 1 and the body 2 are cylindrical, and generally, the diameter of the upper cover 1 is set to be slightly smaller than the diameter of the body 2, and 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 is not limited to cylindrical shape. The axes of the upper cover 1 and the main body 2 are coincident and in contact with each other. Usually, they are closely attached to each other to compress the elastic diaphragm 3. The upper cover 1 and the main body 2 are fixedly connected.

[0057] The fixed connection method of the upper cover 1 and the main body 2 is bolted connection. There are threaded through-holes 12 arranged axially on the outer side of the upper cover 1 , and there are at least two threaded through-ho...

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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, and flow pulsations often occur during the alternate movement of the plunger in the pump chamber. For the chromatographic analysis process, the stability of the flow will affect the repeatability of the separation results. Repeatability is also called reproducibility, and generally refers to the relative standard deviation of the results obtained by performing the same test under the same conditions. For the liquid chromatography system, if the flow rate is unstable, the separation process will be difficult to stabilize, and the repeatability of the obtained chromatographic separation results will be low, which will increase the relative standard deviation. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(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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