CN104117110A

CN104117110A - Micro infusion pump

Info

Publication number: CN104117110A
Application number: CN201410310658.2A
Authority: CN
Inventors: 李小飞; 邱建明; 周红兵
Original assignee: NANTONG SANHE BIOLOGICAL ENGINEERING Co Ltd
Current assignee: NANTONG SANHE BIOLOGICAL ENGINEERING Co Ltd
Priority date: 2014-07-01
Filing date: 2014-07-01
Publication date: 2014-10-29

Abstract

The invention discloses a micro infusion pump which comprises a piston, an upper sheet, a first silica gel mat, a middle sheet, a second silica gel mat and a lower sheet. The upper sheet, the first silica gel mat, the middle sheet, the second silica gel mat and the lower sheet are sequentially connected, the micro infusion pump is characterized in that piston cavities are formed in the first silica gel mat and the middle sheet, a piston rod of the first silica gel mat can move in a piston cylinder along the inner walls of the piston cavities along with movement of the piston, and a liquid suction opening and a liquid outlet are formed in the lower sheet; the micro infusion pump further comprises three pressure valves which are arranged at the position of the liquid suction opening, the position of the liquid outlet and the middle sheet. By means of the technical scheme, the infusion amount is accurate and controllable, and liquid overflowing and blood returning can be effectively prevented.

Description

Trace infusion pump

Technical field

The present invention relates to medical instruments field, be specifically related to a kind of micro-infusion pump.

Background technology

Micro-infusion pump in the market, mainly contains two kinds of infusion pump and syringe pumps.Infusion pump and syringe pump volume are all larger, and use unidirectional current, carry inconvenience, in operation principle, both adopt creeping motion type, and pump liquid valve block moves back and forth by electric-control system, and extruding infusion pipeline is to extrude medicinal liquid.

Thisly in wriggling mode, realize flowing of liquid, often cause amount of infusion accurate not, main cause is: same driving device used tube for transfusion caliber size to have the consumptive material of error will form different infusion amount, and in the production process of disposable pipeline, the factors such as voltage pulsation, amount of deflection size, hauling speed, state of cure (vulcanization) all can affect the dimensional accuracy of its caliber, to keep the concordance of caliber to be difficult to accomplish completely, thus very formidable during the individual variation of peristaltic pump infusion precision when using different consumptive material; The infusion pipeline of peristaltic pump accurately clamping puts in place, mounting and clamping system weares and teares or the plastic deformation of infusion pipeline supporting plate all can cause infusing, and precision changes, difference as poor in infusion set and patient's position, may also can cause the generation of nature water clock and blood back phenomenon.Syringe pump must guarantee 5 milliliters of infusion velocities hourly in medicinal liquid infusion process in addition, otherwise may blocking pipe.

Summary of the invention

For solving the problems of the technologies described above, the invention provides a kind of micro-infusion pump, to reach amount of infusion accurately and can effectively prevent the object of the poor discharge causing of the ubiquitous position due to infusion set and patient of micro-infusion pump and blood back phenomenon.

For achieving the above object, technical scheme of the present invention is as follows: a kind of micro-infusion pump, comprise piston, upper slice, silicagel pad I, middle, silicagel pad II and lower, upper slice, silicagel pad I, middle, silicagel pad II is connected successively with lower, it is characterized in that: described silicagel pad I is provided with piston rod, piston rod extends in the piston hole of middle, piston rod due to the motion of piston can along in sheet piston hole inwall move back and forth, lower is provided with liquid sucting port and liquid outlet, described infusion pump also comprises the pressure valve that is separately positioned on liquid sucting port place, pressure valve on the pressure valve at liquid outlet place and middle.

Preferably, described upper slice below is provided with some rectangular projections.

Preferably, by upper slice, silicagel pad I, in slice, silicagel pad II, lower connect to form adapter successively, described adapter is made by silicone rubber and ABS engineering plastics.

Pass through technique scheme, micro-infusion pump provided by the invention, medicinal liquid enters from the liquid sucting port of lower, and when piston runs to plunger shaft far-end, under infusion pump, the pressure valve at sheet liquid sucting port place is opened, silicagel pad jack-up, in plunger shaft, be full of medicinal liquid, when piston is pressed into, because volume reducing, the increase of medicinal liquid pressure of plunger shaft forces the pressure valve of middle to be opened, medicinal liquid enters middle right chamber through dipper, is pressed into slice from liquid outlet, medicinal liquid to be exported from right chamber.Once piston stop motion, the pressure valve of middle is closed automatically due to the reset of silicagel pad II; After medicinal liquid infused, due to the pressure of human vein blood vessel, the pressure valve at lower liquid outlet place is closed, the problem of blood back after solution medicinal liquid infusion.

Advantage of the present invention: adapter adopts silicone rubber and engineering plastics ABS to form the plunger shaft of a sealing after Precision Machining, and by the mode infusion medicinal liquid of piston, infusion amount is accurately controlled; On sheet liquid sucting port place under infusion pump, liquid outlet place and middle, be respectively arranged with pressure valve, can effectively prevent from changing because of patient body position discharge and the blood back causing.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below.

Fig. 1 is the decomposing schematic representation of the disclosed a kind of micro-infusion pump of the embodiment of the present invention;

Fig. 2 is the disclosed a kind of micro-infusion pump imbibition principle schematic of the embodiment of the present invention;

Fig. 3 is the disclosed a kind of micro-infusion pump fluid principle schematic of the embodiment of the present invention;

The represented corresponding component title of numeral in figure:

1-piston 2-upper slice 21-projection

Sheet in 3-silicagel pad I 31-piston rod 4-

Sheet under 41-piston hole 5-silicagel pad II 6-

61-liquid sucting port 62-liquid outlet 63-pressure valve

64-pressure valve 65-pressure valve

The specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.

According to Fig. 1 to 3, the invention provides a kind of micro-infusion pump, comprise piston 1, upper slice 2, silicagel pad I 3, middle 4, silicagel pad II 5 and lower 6, upper slice 2, silicagel pad I 3, middle 4, silicagel pad II 5 is connected successively with lower 6, upper slice 2 belows are provided with some rectangular projections, its top is provided with by silicone rubber and engineering plastics ABS makes, silicagel pad I (3) is provided with piston rod (31), piston rod (31) extends in the piston hole (41) of middle (4), piston rod (31) due to the motion of piston (1) can along in piston hole (41) inwall of sheet (4) move back and forth, be provided with liquid sucting port 61 and liquid outlet 62 for lower 6, described infusion pump also comprises the pressure valve 63 that is separately positioned on liquid sucting port 61 places, pressure valve 65 on the pressure valve 64 at liquid outlet 62 places and middle 4.

Micro-infusion pump provided by the invention, adopting in silicone rubber and the engineering plastics ABS adapter through Precision Machining formation is the plunger shaft of a sealing, like this, the infusion amount that the distance that piston advances and piston rod footpath have determined medicinal liquid, when piston 1 runs to the far-end of plunger shaft, under infusion pump, the pressure valve 63 at liquid sucting port 61 places of sheet 6 is opened, silicagel pad II 5 jack-up, medicinal liquid enters from the liquid sucting port 61 of lower 6, in plunger shaft, be full of medicinal liquid, when piston 1 is pressed into, the pressure valve 63 at liquid sucting port 61 places is closed, simultaneously, the pressure valve 64 of sheet 4 is because the continuous increase of medicinal liquid pressure is opened, dipper in medicinal liquid process in sheet 4 enters middle 4 right chambeies, now, the pressure valve 65 at liquid outlet 62 places of lower 6 is opened, medicinal liquid is from liquid outlet 62 outputs.Once piston stop motion, the pressure valve 64 of middle 4 is closed automatically due to the reset of silicagel pad II 5; After medicinal liquid infused, due to the pressure of human vein blood vessel, the pressure valve 63 at liquid outlet 62 places of lower 6 is closed, do not have discharge and the blood back phenomenon of medicinal liquid.

Whole imbibition, fluid process are controlled by singlechip technology, be provided with maltilevel security system protection and guarantee use procedure safety, and medicinal liquid infusion amount is accurately controlled; Adopt silicone rubber and ABS engineering plastics through Precision Machining, to form the plunger shaft of a sealing, by the mode infusion medicinal liquid of piston, infusion amount is accurately controlled; Under infusion pump, in the liquid sucting port of sheet, liquid outlet and plunger shaft, sheet end is respectively arranged with pressure valve, water clock and the blood back phenomenon that can effectively prevent that infusion from finishing or cause because of patient body's potential difference.In addition, in transfusion, adopt in connected system bottle stopper thorn device to connect, reduced the probability that moves the secondary pollution that liquid causes; Simultaneously, in producing the process of the extrusion infusing pipeline being used in conjunction with infusion pump, use the DOTP (DEHT) of low toxicity as plasticizer, avoided the harm of adjacent benzene class plasticizer (DEHP) to human body, and can reduce the absorption of extrusion infusing pipeline to medicinal liquid.

Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment and retouching, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. a micro-infusion pump, comprise piston (1), upper slice (2), silicagel pad I (3), middle (4), silicagel pad II (5) and lower (6), upper slice (2), silicagel pad I (3), middle (4), silicagel pad II (5) is connected successively with lower (6), it is characterized in that: in silicagel pad I (3), be provided with piston rod (31), piston rod (31) extends in the piston hole (41) of middle (4), piston rod (31) due to the motion of piston (1) can along in piston hole (41) inwall of sheet (4) move back and forth, lower (6) are provided with liquid sucting port (61) and liquid outlet (62), described infusion pump also comprises and is separately positioned on the pressure valve (63) that liquid sucting port (61) is located, the pressure valve (64) that liquid outlet (62) is located and the pressure valve (65) on middle (4).

2. a kind of micro-infusion pump according to claim 1, is characterized in that: described upper slice (2) below is provided with some rectangular projections (21).

3. a kind of micro-infusion pump according to claim 1, it is characterized in that: by upper slice (2), silicagel pad I (3), in slice (4), silicagel pad II (5), lower (6) connect to form successively adapter, described adapter is made by silicone rubber and engineering plastics ABS.