CN216458946U

CN216458946U - Splash-proof centrifugal test tube

Info

Publication number: CN216458946U
Application number: CN202120717585.4U
Authority: CN
Inventors: 赵晓明; 吴文娟
Original assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Current assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2022-05-10
Anticipated expiration: 2031-04-09

Abstract

The utility model relates to an anti-splash centrifugal test tube. The pipe comprises a pipe body with an upper end opening and a lower end being closed, wherein the pipe body comprises a pipe plug section, a burette guide section, a closing narrow section, a splash-proof backflow section and an accommodating section which are sequentially connected from top to bottom, the pipe plug section is of a circular pipe shape with vertical side walls, the upper end caliber of the burette guide section is equal to the lower end caliber of the pipe plug section, and the lower end caliber of the splash-proof backflow section is equal to the upper end caliber of the accommodating section; the joint of the lower end of the burette guide section and the upper end of the splash-proof backflow section forms a folding narrow section, and the caliber of the folding narrow section is smaller than the caliber of the upper end of the burette guide section and the caliber of the lower end of the splash-proof backflow section respectively.

Description

Splash-proof centrifugal test tube

Technical Field

The utility model relates to a medical centrifugal test tube, in particular to an anti-splash centrifugal test tube.

Background

In the laboratory detection operation process of trades such as medical health inspection, blood transfusion, blood station, can frequently use centrifuge to carry out centrifugal operation to liquid sample, the supporting liquid sample carrier of centrifuge is the test tube usually, and the test tube size that immunohematology is experimental commonly used is mostly: phi 12mm multiplied by 75mm, because the opening of the test tube is small, the whole structure of the tube body is a straight tube type, and when a pipette or a pipette gun is used for transferring liquid into the test tube for sample adding operation, the phenomenon that the pipette or the pipette gun accidentally touches the inner wall of the test tube or liquid drops on the inner wall of the test tube, particularly near the opening of the test tube, is inevitable.

Because of the disposable test tube of each medical industry laboratory use more at present, its material is plastics, and liquid has the adhesion in the test tube, is difficult for drippage to the bottom of the tube. If a mixed liquid of a sample and blood remains on the wall of the test tube or near the test tube opening, the following situations may occur during centrifugation using a centrifuge:

1. liquid splashes out of the test tube, and especially when the volume of the liquid in the test tube is large, the loss of a liquid sample is caused, so that the accuracy of a detection result is influenced;

2. the sample blood mixed liquid splashed out of the test tube may pollute other test tube samples and even a centrifuge;

3. even use the area and cover the test tube, often there is residual liquid in test tube lid and test tube mouth combination gap department after the centrifugation, often pollutes operating personnel gloves when operating personnel unscrews the test tube lid easily, and the operator leads to the cross contamination between the different samples when carrying out the operation of big sample volume easily.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the splash-proof centrifugal test tube which has simple structure and low cost, can realize splash prevention without additionally adding other accessories and reduces the possibility of secondary pollution.

The utility model is realized by the following steps: a splash-proof centrifugal test tube comprises a tube body with an upper end opening and a lower end being sealed, wherein the tube body comprises a tube plug section, a dropper guide section, a drawing narrow section, a splash-proof backflow section and a containing section which are sequentially connected from top to bottom, the tube plug section is of a circular tube type with a vertical side wall, the upper end caliber of the dropper guide section is equal to the lower end caliber of the tube plug section, and the lower end caliber of the splash-proof backflow section is equal to the upper end caliber of the containing section; the joint of the lower end of the burette guide section and the upper end of the splash-proof backflow section forms a furling narrow section, and the caliber of the furling narrow section is respectively smaller than the caliber of the upper end of the burette guide section and the caliber of the lower end of the splash-proof backflow section; the caliber of the furling narrow section is 5 mm-14 mm.

The total height of the dropper guide section, the gathering narrow section and the splash-proof backflow section is 19-53 mm.

The caliber of the lower end of the pipe plug section is equal to the caliber of the upper end of the containing section and is 12 mm-32 mm respectively.

The pipe wall that burette guide section, draw in narrow section and splashproof backward flow section and link to each other and form is rotatory parabolic curved surface, the equation of rotatory parabolic curved surface is: f (a), (b)

Z) =0, wherein 0.2143 x is not less than 0.50 x phi, 0.2143 y is not less than 0.50 x phi, phi = the bore of the upper end of the containing section; the generatrix geometric equation of the rotating parabolic curved surface is as follows: z2-18y = 0.

The height of body is 75mm ~200 mm.

The utility model has the beneficial effects that: the tube plug section is used for accommodating a general test tube plug, and the pipette guide section guides the pipette or the pipette head to enter the splash-proof backflow section through the narrow section, so that the pipette head end or the pipette head is prevented from touching the tube wall of the accommodating section, if liquid drops to the tube wall of the pipette guide section carelessly, the liquid drops to the bottom of the accommodating section directly after being gathered by the inclined plane guide of the pipette guide section, and the phenomenon of liquid hanging on the wall of the test tube is reduced.

Connecting the burette guide section and the splash-proof backflow section through the furling narrow section; the narrow section is the narrowest part of the whole test tube, so that the liquid in the test tube can be reduced or avoided from splashing. In addition, the closing narrow section can be directly projected to the bottom of the test tube along the axis of the test tube, so that the liquid in the dropper guide section can be directly dripped into the bottom of the test tube without hanging on the wall.

When the tube body of the movable test tube is taken, more liquid is in the tube body, the centrifugal balancing fault occurs, and the centrifuge shakes, the liquid in the test tube can be reduced or prevented from splashing out through the splash-proof backflow inclined plane by closing the narrow section, and the liquid is made to flow back to the accommodating section of the test tube. The containing section is a containing part of the test tube and is used for containing liquid.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Wherein: 1. a pipe body; 2. a pipe plug section; 3. a dropper guide section; 4. closing the narrow section; 5. an anti-splash backflow section; 6. a containment section.

Detailed Description

According to the figure 1, the splash-proof centrifugal test tube comprises a tube body 1 with an opening at the upper end and a closed lower end, wherein the tube body 1 comprises a tube plug section 2, a dropper guide section 3, a gathering narrow section 4, a splash-proof backflow section 5 and an accommodating section 6 which are sequentially connected from top to bottom. The pipe plug section 2 is of a circular pipe type with a vertical side wall, the caliber of the upper end of the dropper guide section 3 is equal to that of the lower end of the pipe plug section 2, and the caliber of the lower end of the splash-proof backflow section 5 is equal to that of the upper end of the accommodating section 6; the joint of the lower end of the dropper guide section 3 and the upper end of the splash-proof backflow section 5 forms a furling narrow section 4, and the caliber of the furling narrow section 4 is respectively smaller than the caliber of the upper end of the dropper guide section 3 and the caliber of the lower end of the splash-proof backflow section 5; the caliber of the gathering narrow section 4 is 5 mm-14 mm, preferably 5.14 mm. The total height of the dropper guide section 3, the gathering narrow section 4 and the splash-proof return section 5 is 19 mm-53 mm, and preferably 19.71 mm. The caliber of the pipe plug section is 2mm, equal to the caliber of the accommodating section 6, and is 12 mm-32 mm, preferably 12 mm. The height of body 1 is 75mm ~200mm, preferably 75 mm.

The plane of a closing narrow section perpendicular to the central axis of the tube body of the test tube is taken as a reference, the tube wall formed by connecting the dropper guide section 3, the closing narrow section 4 and the splash-proof backflow section 5 is a rotating parabolic curved surface, and the equation of the rotating parabolic curved surface is as follows: f (a), (b)

Z) =0, wherein 0.2143 x is not less than 0.50 x phi, 0.2143 y is not less than 0.50 x phi, phi = the bore of the upper end of the containing section; the generatrix geometric equation of the rotating parabolic curved surface is as follows: z is a radical of²-18y=0。

When the liquid dropper is used, the liquid dropper or the pipette is firstly used for aligning the center of the bottom of the liquid dropper, and if the head of the liquid dropper or the pipette carelessly touches the liquid dropper guide section 3, the liquid dropper guide section 3 can promote liquid to directly drop into the bottom of the accommodating section 6 of the liquid dropper through the narrow section 4. If the tube body 1 is taken and moved, or when the centrifugal balancing fault, the centrifuge shake and more liquid in the tube body 1 cause the liquid to shake in the tube body 1, the closing narrow section 4 can reduce or avoid the liquid in the accommodating section 6 of the tube body 1 from splashing out, and meanwhile, the inclined surface of the splash-proof backflow section 5 can reduce or avoid the liquid in the accommodating section 6 from splashing out through the closing narrow section 4 and can promote the liquid to flow back into the accommodating section 6.

Claims

1. The utility model provides a splashproof centrifugation test tube, includes upper end opening, lower extreme confined body, its characterized in that: the pipe body comprises a pipe plug section, a dropper guide section, a closing narrow section, an anti-splash backflow section and a containing section which are sequentially connected from top to bottom, wherein the pipe plug section is of a circular pipe shape with vertical side walls, the caliber of the upper end of the dropper guide section is equal to that of the lower end of the pipe plug section, and the caliber of the lower end of the anti-splash backflow section is equal to that of the upper end of the containing section; the joint of the lower end of the burette guide section and the upper end of the splash-proof backflow section forms a furling narrow section, and the caliber of the furling narrow section is respectively smaller than the caliber of the upper end of the burette guide section and the caliber of the lower end of the splash-proof backflow section; the caliber of the furling narrow section is 5 mm-14 mm.

2. The splash proof centrifuge tube of claim 1, wherein: the total height of the dropper guide section, the gathering narrow section and the splash-proof backflow section is 19-53 mm.

3. The splash proof centrifuge tube of claim 1, wherein: the caliber of the lower end of the pipe plug section is equal to the caliber of the upper end of the containing section and is 12 mm-32 mm respectively.

4. The splash proof centrifuge tube of claim 1, wherein: the pipe wall that burette guide section, draw in narrow section and splashproof backward flow section and link to each other and form is rotatory parabolic curved surface, the equation of rotatory parabolic curved surface is:

f(

z) =0, wherein 0.2143 x is not more than 0.50 x, 0.2143 x is not less than 0.50 xY is not less than 0.50 phi, and phi = the caliber of the upper end of the containing section; the generatrix geometric equation of the rotating parabolic curved surface is as follows: z is a radical of²-18y=0。

5. The splash proof centrifuge tube of claim 1, wherein: the height of body is 75mm ~200 mm.