DE1932368A1 - Trial tubes - Google Patents

Description

GRHHE & ELBGTRONIÖ A.G., Laiig ent hai (Sohweis).

Broberöhrohen "

When performing chemisoher and / or physical It is often necessary to carry out analyzes in one vessel existing samples to durohmisohen or to stir " For this purpose, you have stirring or mixing blades in the Gtfäse introduced, which mediate a suitable drive perform torsional vibrations in relation to the vessel «around the To support the effect of the agitator or misoh blades one further on the inner wall of the vessel radially inward pointing baffles attached. The vessel can also be given torsional vibrations that lead to the torsional vibrations the agitator or liisoh blades are in opposite directions · you The vessels in question for this have a capacity from a few liters down to a few liters where su beaehtsn is that the vessels only up to one Know a fraction of your compositional assets »

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if «splashing of the contents of the vessel during the stirring or grinding process is to be avoided ·

However, there are only a few Quantities of the samples are available and these are accordingly placed in sample tubes, which are usually a Fasaungs-

t can have between about 0.5 to 5 milliliters * The Sample tubes themselves are only intended for single use in the Hegel and can therefore not be expensive · These and other requirements are preventing us from now Sample tubes the use of the usual means of stirring or thermosetting the samples in larger vessels and, in particular, stirring or misoing blades moved relative to the inner wall of the sample tubes are out of the question.

The present invention thus relates to a sample tube

W ohen with a capacity in the milliliter range, which is preferably intended for a single use and consists of an essentially cylindrical tube and a base attached to the latter in one piece only the Proberohrrohen as a whole around its pipe ax around in Dreiisohwektiven are in the interior of the erfindemgege-. one or more tongues attached to the sample tube,

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1B32368

Which from the pipe axis eretreoken radially near the outside and outside of their outer bathing on the one hand and the inner wall of the pipe on the other hand each leave a gap, whereby these tongues are connected to the floor and eioh voa floors from free standing near the top to the area of the upper one Extend the pipe end. In the case of the precautionary version ora des ar finding eg "tnäjee en Groberöhrohene, however, only two tongues of the above-mentioned abaeeeungen are provided, which are inteiglieh of the pipe txe syemetrisolj formed double * joints picture" 3Q _# with the inner wall of the pipe a consistently smooth, while the other tongues of the tongues are formed with sharp edges, two-way tongues and the tongues, only "it" has their sharp-edged outer surface, "benifted and smooth. Further details' dee erf Indtingegeaüeeen ϊ in the 2eiohimne.

■ '- ■■ ■ ■? Ig * 1 »guided« through the pipe *! Then the rehearsal tube should be heard and

fig " Z a cross-section taken about halfway up the tube ex" through the sample tube according to Fig. 1 "

The test tube according to S ¹ JLg, 1 and 2 is vorsugsireje «

made of a liquid-repellent material, such as the * »

0098 3.1 / USi

- ■ 4 ■ -

a polypropylene "manufactured and consists of a substantially cylindrical tube 3 and the latter integrally attached vessel bottom 4 · interior is · duroh formed of the bottom 4 is a perpendicular to the tube axis 5 flat surface in the interior of the tube 3 are two tongues 6 and 6 ¹ attached, which extend radially outward from the tube axis 5 and, in the embodiment shown, result in a double tongue formed symmetrically to the tube axis 5. The tongues 6 and 6 'are integrally connected to the base 4 and rise from the same freestanding towards obtn up to the area of the upper pipe mouth 3'. As can be seen from Fig. 1, the double tongue 6, 6 * can be just below the Muzzle 3 'nooh be rounded. The ends 7 and 7 'of the tongues 6 and 6' which are outer in the radial direction preferably form sharp edges which leave a gap 8 or 8 'of approximately constant gap width between them and the inner wall of the tube 3. Furthermore, the inner wall of the tube 3 "the inside of the base 4, as well as the tongues 6 and 6 '- the latter, however, with the exception of their sharp edges 7 and 7 ¹ - consistently smooth surfaces" The tube 3 still has its outer side protruding guide pins 9 and 9 'as well as

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10 and ΙΟ ¹ , of which the latter in Fig. I only the nit 10 designated guide pin is indicated by dashed lines. The sample tube shown is designed for a capacity in the milliliter range; the height of the pipe 3 can thus be, for example, up to 5> 0 centimeters if its inner diameter is approximately 1.3 centimeters *

In practical use, the sample tube is pushed into a holder not shown in detail in the drawing, in which it is by means of its guide pins 9.9 * and 10, 10 * should be held in a torsion-proof manner · The holder is rotatably mounted about a shaft concentric to the pipe gauze 5 and a drive is also provided which Brehsohwimmern granted to the owner · For those noted above Dimensions of the sample tube has proven to be advantageous proved an amplitude of the torsional vibrations of about - 40 Angular degrees to be used if the frequency of the torsional oscillations is between 5 and 10 Hertz

If there is now a liquid in the sample tube, so are briefly significant when executing sinusoidal torsional vibrations in columns 8 and 8 ' Relative total velocities of the liquid in relation to the pipe wall generated · At the sharp edges 7 and 7 * then sets a strong eddy formation, which a quick and thorough-

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oh · agitation or Durohmisohung the liquid aur result Has. A particular advantage is that there is no formation of bubbles and no splashing out of the liquid. Sas sample tubes can therefore be close to the upper rounding of the Tongues 6 and 6 '(Fig. 1) filled «earth. On the other hand, the desired stirring or Durohmisohungseffekt occurs in the same way, then, when the pro ^ roar only until a small fraction of its pipe height is filled.

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Claims (1)

VT = T, i ^! '! . not ul. d- ti wt-rd Claims «. 1J test tube with a capacity in the milliliter range, which is preferably intended for only one-time use and consists of an essentially cylindrical tube and a base attached to the latter in one piece, characterized in that one or more tongues (6,6 ^{·) Are attached, which extend radially outwards from the pipe axis (5) and leave a gap (8 or 8 1} ) between their outer ends (7,7 ') on the one hand and the inner wall of the pipe (3) on the other , and that these tongues (6, 6 ') are integrally connected to the base (4) and extend freely from the base (4) up to the area of the upper pipe mouth (3 ¹ ) » 2 »sample tube according to claim 1, characterized in that that the inner wall of the tube (3) is consistently smooth, while the outer ends (7,7 '} of the tongues (6,6') are sharp-edged are trained » 3ο test tube according to claim 2, characterized in that, with the exception of the sharp-edged outer ends "(7,7 ') of the tongues (6 _{r for} ^r ), the latter likewise had smooth surfaces throughout. 009 83 1 / UFi 4. Sample tube according to claim _1, characterized in that the inside of the base (4) is formed by a flat surface perpendicular to the pipe axis (5) and that the tongues (6, 6 ') between their outer ends (7,7 * )
and the inner wall of the pipe (3) leave gaps (8.8) of at least approximately constant gap width 5. Sample tube according to one of the preceding claims, characterized in that only two tongues (6 and 6 ¹ ) are provided, which one with respect to the pipe axis (5)
form symmetrical double tongue