CN2390200Y

CN2390200Y - Blood viscosimeter

Info

Publication number: CN2390200Y
Application number: CN 99234954
Authority: CN
Inventors: 张延长
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-17
Filing date: 1999-09-17
Publication date: 2000-08-02
Anticipated expiration: 2009-09-17

Abstract

The utility model provides an instrument for measuring the viscosities of liquids, particularly an instrument which is suitable for measuring the viscosities of blood. The utility model has the advantages of constant pressure, variable speed, accurate test, high stability, simple structure, convenient operation, easy cleaning, etc. The instrument can simultaneously measure the viscosities of the liquids at a plurality of shear rates. The utility model is suitable for application in various medical departments and scientific research departments.

Description

Blood viscosity instrument

The utility model relates to a kind of instrument of measuring fluid viscosity, relates to a kind of instrument of measuring blood viscosity specifically.

The clinical two class blood viscosity instruments that mainly contain before the utility model, a class is the capillary viscosity instrument, a class is the swinging viscosity apparatus, comprises drum type brake viscosity apparatus and cone-plate formula viscosity apparatus.Though two class viscosity meters respectively have advantage, all have different defectives, be to regulate the kapillary pressure at two ends as the capillary viscosimeter maximum according to shortcoming, can't measure the shear rate of fluid, use is restricted.The swinging viscosity apparatus is by rotation inner core or circular cone, measure liquid viscosity to the convert viscosity of liquid of the influence of revolving force torsion, this viscosity apparatus can be surveyed the viscosity of general fluid, but measure special fluid blood viscosity poor effect, the deformable characteristics because erythrocytic existence in the blood, red blood cell are flowed make rotary viscosimeter can't satisfy blood flowing characteristic, can't accurately measure the true viscosity of blood, not have bionical meaning.Simultaneously the swinging viscosity apparatus also exists complex structure, operation easier big, cleans shortcomings such as inconvenience.

The purpose of this utility model provide a kind of simple in structure, measure accurately, that operation is cleaned is convenient, can measure the viscosity under a plurality of shear rates of fluid simultaneously, can guarantee testing tube two ends constant voltage, meets the blood viscosity instrument of bionic principle again.

Blood viscosity instrument of the present utility model is realized in the following manner:

A kind of blood viscosity instrument comprises testing tube, support, time device, constant temperature oven, and its special character is: testing tube is to be connected into by the kapillary more than 2 Type, from top to bottom, the angle of inclination of every capillary increases progressively, and time set is equipped with in every capillary downstream, and described length capillaceous is 200-300mm, and internal diameter is 1-4mm, external diameter 4-8mm.

In most preferred embodiment, use the step of described viscosity meter to be:

1, use suction pipe to draw the about 0.2ml of sample liquid at every turn;

2, with sample liquid from testing tube injection testing tube suitable for reading;

3, sample liquid flows downward along testing tube, is α by testing tube medium dip angle according to this ₁Kapillary, α ₂Kapillary, α ₃Kapillary ..., discharge from escape hole at last.

4, the time set in every capillary downstream record flowing time draws the flowing velocity of fluid under the different angles.

5, microcomputer analysis shows, with the flowing velocity input microcomputer that is write down, draws flow curve, prints the viscosity under the various shear rates.

6, behind sample of mensuration, testing tube is cleaned, repeat the above-mentioned steps test.

Blood viscosity instrument of the present utility model has following actively useful effect:

1, energy constant voltage, testing tube is connected to form up and down by kapillary and communicates

Type pipe, and internal diameter even thickness, so flow of liquid is crossed each section of testing tube kapillary, fluid column two ends pressure reduction is constant.

2, can survey a plurality of shear rates of liquid simultaneously, because every section pitch angle capillaceous of testing tube is different, every section kapillary fluid column two disconnected pressure of flowing through are different, its flow velocity of kapillary of fluid column flow path differing tilt angles is different, time set is measured the flow velocity of respective liquid, thereby draws corresponding shear rate.

3, good stability, because every section capillary pipe length of testing tube, internal diameter and angle of inclination are fixed, each test can be because of the result of internal diameter capillaceous and angular error influence test.And have simple in structure, processing ease, clean advantage easily.

Now be described further in conjunction with the accompanying drawings with preferred embodiment.

Fig. 1 is the schematic configuration diagram of an embodiment of the utility model blood viscosity instrument, (being front elevation).

Numbering 1 is the testing tube inlet among the figure, the 2nd, and the kapillary of composition testing tube, the 3rd, support, the 4th, time set, the 5th, constant temperature oven, the 6th, testing tube outlet.

Introduce principle of work of the present utility model below in conjunction with accompanying drawing: The type testing tube is formed with two above printing opacity kapillaries, as glass tube, quartz ampoule, glass reinforced plastic pipe etc., capillary pipe length is 200-300mm, internal diameter 1-4mm, external diameter 4-8mm, even thickness, the angle of inclination of each capillary is specific, the kapillary angle of inclination increases progressively from top to bottom, and both next section pitch angle capillaceous was greater than the preceding paragraph angle of inclination capillaceous, as α ₁Be 2 °, α ₂Be 5 °, α ₃Be 10 °, α ₄Be 15 °, α ₅Be 20 °, α ₆It is 25 ° etc.

Testing tube inlet 1 is a funnel type, is beneficial to add test solution.Time set 4 is optoelectronic switches, two groups of optoelectronic switches are installed in every section kapillary downstream, every group of photoelectricity beginning is made up of photoresistance and light emitting diode, distance between two groups of optoelectronic switches is constant and accurately, two group distances are 50mm, time set 4 is to be fixed on the support 3, and testing tube also can be to be surrounded on support, is beneficial to the installation of time set.Testing tube, time set, support are positioned at constant temperature oven 5, and calorstat temperature is adjustable, automatic constant-temperature, temperature is controlled at 25 ℃ or 37 ℃, can adopt air constant temperature (also can adopt constant temperature water bath).

During measurement, draw about 0,2ml sample liquid with suction pipe, (the about 100mm of the liquid column length in kapillary) adds testing tube by testing tube suitable for reading 1 with sample liquid, and it is α that sample liquid enters first section angle of inclination ₁Kapillary, sample liquid fully forms Bernoulli Jacob and flows in first section kapillary behind run-up one segment distance, the fluid column leading peak is successively by the downstream time set---two groups of photoelectricity beginnings, the record flowing time, must arrive the angle of inclination is α ₁The sample liquid flow velocity.Sample liquid continues to flow downward, and successively by the kapillary of differing tilt angles, obtains the sample liquid flow velocity under the different angles, and the input microcomputer is drawn flow curve, and final sample liquid flows out from testing tube outlet 6.Test finishes.

After having surveyed a sample, clean testing tube, prepare next sample test.

Fig. 1 is a kind of embodiment of the utility model blood viscosity instrument, and the mobile demonstration of clocking of described fluid also can be adopted other electronic surveying display device.Described testing tube can be made up of two capillaries, measure the low viscosity of cutting for last one, next root is measured height and is cut viscosity, also can form, survey the low viscosity of cutting, cut viscosity in middle survey for last one by three capillaries, a following survey height is cut viscosity, also can form, can survey the viscosity of a plurality of shear rates, decide as required by many capillaries.This instructions does not exemplify one by one.

Blood viscosity instrument of the present utility model also can be used for the measurement of other fluid viscosities.

Claims

1, a kind of blood viscosity instrument comprises testing tube, support, time device, constant temperature oven, it is characterized in that testing tube is to be connected into by the kapillary more than 2

Type, from top to bottom, the angle of inclination of every capillary increases progressively, and every capillary downstream is equipped with time device.

2, it is characterized in that according to the described blood viscosity instrument of claim 1 length capillaceous is 200-300mm, internal diameter is 1-4mm, and external diameter is 4-8mm.