CN216573160U - Suction head with adjustable depth - Google Patents

Abstract

The utility model discloses a suction head with adjustable depth, which comprises a liquid suction head, a height adjusting gear and a rotatable assembly, wherein the liquid suction head is used for sucking waste liquid in a test tube, the height adjusting gear is arranged on the outer side of the liquid suction head and used for clamping the liquid suction head, the rotatable assembly is arranged at the top of the liquid suction head and connected with a negative pressure suction apparatus through a connecting pipe, and the scale and the depth adjusting gear are combined, so that the problem of controllable sample retention amount is solved, and the continuity of experimental operation is increased; a replaceable filter membrane is added, so that the problem that macromolecular substances are attached to the inner walls of the suction head and the connecting pipe is solved; the material of the suction pipe is changed, the service life is prolonged, the working efficiency is improved, and the material cost is saved.

Description

Suction head with adjustable depth

Technical Field

The utility model relates to the technical field of cell chromosome analysis experiments, in particular to a suction head with adjustable depth.

Background

The nucleus of cell is a linear body which is composed of nucleoprotein, can be stained by alkaline dye and has a structure, and is a carrier of genetic material gene. In the nucleus of an organism, there is a substance, called chromatin, which is easily colored by basic dyes. Chromosomes are only another form of chromatin. Their compositions are identical, but differ somewhat due to the different configurations. Chromosomes are formed by chromatin helicization during the mitotic phase of a cell. The chromatin of prokaryotic cells used for chemical analysis contains naked DNA, i.e.is not linked to other molecular species.

The experimental steps of the cell chromosome karyotype analysis technology in the prior art need hypotonic, pre-fixing and twice fixing, supernatant needs to be abandoned in the steps, useful cells are easily poured out by directly pouring, and the standardized operation is not facilitated.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide a suction head with adjustable depth, which solves the problems mentioned above in the background art.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The embodiment of the utility model discloses a suction head with adjustable depth, which comprises a liquid suction head, a height adjusting gear and a rotatable assembly, wherein the liquid suction head is used for sucking waste liquid in a test tube, the height adjusting gear is arranged on the outer side of the liquid suction head and used for clamping the liquid suction head, the rotatable assembly is arranged at the top of the liquid suction head, and the rotatable assembly is connected with a negative pressure suction apparatus through a connecting pipe.

Preferably, the liquid suction head comprises a suction pipe, the bottom of the suction pipe is a tip, and the suction pipe is provided with scale marks.

Preferably, the suction pipe is provided with a height adjusting gear in sliding fit, the height adjusting gear is provided with a through hole, and the inner diameter of the through hole is smaller than the outer diameter of the suction pipe.

Preferably, the top of the suction pipe is provided with an external thread, and the external thread is used for being in threaded rotary connection with the rotatable component.

Preferably, the rotatable assembly comprises a sleeve, an internal thread is arranged on the inner side of the bottom of the sleeve, the sleeve is in threaded running fit with the suction pipe, and the top end of the sleeve is connected with the negative pressure suction apparatus through a connecting pipe.

Preferably, the sleeve is internally provided with a limiting ring, the inner diameter of the limiting ring is equal to the inner diameter of the suction pipe in size, and the sleeve is internally matched with a filter membrane in a sliding manner, and the filter membrane is used for filtering solid and macromolecular substances.

Preferably, the suction pipe is made of wear-resistant plastic, and the outer wall of the suction pipe is subjected to frosting treatment.

Compared with the prior art, the utility model combines the scales and the depth adjusting gears, solves the problem of controllable sample retention amount, and increases the continuity of experimental operation; a replaceable filter membrane is added, so that the problem that macromolecular substances are attached to the inner walls of the suction head and the connecting pipe is solved; the material of the suction pipe is changed, the service life is prolonged, the working efficiency is improved, and the material cost is saved.

Drawings

FIG. 1 is a schematic view of an adjustable depth tip of the present invention.

FIG. 2 is a schematic view of a rotatable assembly in an adjustable depth tool tip according to the present invention.

Reference numerals:

1-a liquid suction head, 11-a suction pipe, 12-a scale mark, 13-an external thread, 2-a height adjusting gear, 3-a rotatable component, 31-a sleeve, 32-an internal thread, 33-a limiting ring and 4-a filter membrane.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Examples

As shown in figures 1 and 2, a suction head with adjustable depth comprises a liquid suction head 1, a height adjusting gear 2 and a rotatable component 3, wherein the liquid suction head 1 is used for sucking waste liquid in a test tube, the height adjusting gear 2 is installed on the outer side of the liquid suction head 1, the height adjusting gear 2 is used for clamping the liquid suction head 1, when the liquid suction head 1 extends into the test tube, due to the action of the height adjusting gear 2, when the height adjusting gear 2 is in contact with the test tube, the liquid suction head 1 is prevented from continuously moving downwards, the distance between the bottom surface of the height adjusting gear 2 and the bottom of the liquid suction head 1 can be adjusted by adjusting the position of the height adjusting gear 2 on the liquid suction head 1, the length of the liquid suction head 1 extending into the test tube can be adjusted, the technical effect that the sample amount in the test tube can be controlled can be realized, the rotatable component 3 is installed at the top of the liquid suction head 1, the rotatable component 3 is used for filtering solid and macromolecular substances, rotatable assembly 3 is connected with the vacuum extractor through the connecting pipe, and rotatable assembly 3 can prevent that impurity from getting into in the connecting pipe, increases the life of connecting pipe.

The pipette head 1 comprises a pipette 11, the bottom of the pipette 11 is pointed, the pipette head can quickly stretch into the liquid level below in a test tube, the large-caliber end portion stretches into a test tube page to enable the contact area between the pipette 11 and waste liquid in the test tube to be too large, the liquid level can be greatly increased, the liquid level height in the test tube after the pipette 11 is pulled out can be influenced, the influence on the liquid level height is too large, the liquid level can be possibly lower than the expected height, the pointed end of the pipette 11 can be quickly pulled out when the tip of the pipette 11 stretches into the liquid level to efficiently take out the liquid, scale marks 12 are arranged on the pipette 11, the supernatant liquid extracted in the pipette 11 can be directly observed through the scale marks 12, the amount of the supernatant liquid which can be intuitively taken out through reading the scale marks 12, and whether the pipette 11 is pulled out or not is judged when the experiment operation is convenient.

Sliding fit has height control shelves 2 on straw 11, be provided with the through hole on height control shelves 2, the internal diameter of through hole is less than straw 11's external diameter, height control shelves 2 are made for elastic rubber, certain elasticity has, can make height control shelves 2 card on straw 11 under the effect of through hole shrink, height control shelves 2 and straw 11 remain stable under the support of elastic force, daily operation's external force can not make height control shelves 2's position take place to remove, reciprocate on straw 11 through height control shelves 2, can know the degree of depth that straw 11 will stretch into the test tube through reading scale mark 12, but greatly reduced is owing to artifical experience absorbs produced error, can promote the clearance of supernatant greatly, reducible cell is by the volume of suction.

The top of the suction pipe 11 is provided with an external thread 13, and the external thread 13 is used for being in threaded rotary connection with the rotatable component 3 and can tightly connect the liquid suction head 1 with the rotatable component 3.

As shown in fig. 2, the rotatable assembly 3 includes a sleeve 31, an internal thread 32 is disposed on the inner side of the bottom of the sleeve 31, the sleeve 31 is in threaded rotation fit with the straw 11, the axial degree of freedom of the straw 11 and the sleeve 31 is limited by the mutual rotation fit of the internal thread 32 and the external thread 13, the straw 11 can be tightly connected with the sleeve 31, the top end of the sleeve 31 is connected with a negative pressure aspirator through a connecting pipe, negative pressure can be generated in the straw 11 by communicating the sleeve 31 with the straw 11, the straw 11 can suck supernatant in a test tube into the straw 11 in order to ensure the pressure in the straw 11 is balanced with the atmospheric pressure, the difference between the pressure in the straw 11 and the atmospheric pressure is adjusted through the negative pressure aspirator, the supernatant can be quantitatively sucked, and experimental errors caused by manual operation errors are greatly reduced.

Install spacing ring 33 in the sleeve pipe 31, the internal diameter of spacing ring 33 equals with 11 internal diameters of straw big or small, sliding fit has filter membrane 4 in sleeve pipe 31, through straw 11 and sleeve pipe 31 screw thread normal running fit, straw 11's top and filter membrane 4 contact, push away filter membrane 4 to spacing ring 33 bottom behind straw 11 rotatory entering sleeve pipe 31, under spacing ring 33 and straw 11's limiting displacement, filter membrane 4 can guarantee the position stability in sleeve pipe 31, filter membrane 4 is used for solid-state and macromolecular substance to carry out effective filtering, reduce and adheres to, increase straw 11's life.

The suction pipe 11 is made of wear-resistant plastic, the inner wall of the suction pipe 11 is smooth and not easy to adhere to the suction pipe, the outer wall of the suction pipe is frosted, friction between the outer surface and the hands of experiment operators is large, grasping is easier, and the stability of the suction step in the experiment can be guaranteed.

The sleeve is provided with an adsorption piece.

The sucking part is the sucking disc, and set up in on the tip of sleeve pipe or the lateral wall, in order to realize with the sucking disc adsorbs in smooth surface department, wherein, the sucking disc can be provided with one or more.

The adsorption piece is a magnetic block and is arranged on the end part or the side wall of the sleeve so as to realize that the magnetic block is adsorbed on the surface of iron or a foreign magnet.

During operation, through the concrete demand of experiment, height-adjusting festival shelves 2 on straw 11, through scale mark 12 can the position of visual observation height-adjusting shelves 2, stretch into the test tube with straw 11 in, under height-adjusting shelves 2's limiting displacement, inside straw 11 can't all get into the test tube, through starting the vacuum aspiration ware, the precision of experiment has been promoted greatly to the supernatant ration suction of accessible straw 11 in with the test tube.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A suction head with adjustable depth is characterized by comprising a liquid suction head, a height adjusting gear and a rotatable component

State the imbibition head and be arranged in absorbing the waste liquid in the test tube, the altitude mixture control shelves are installed in the outside of imbibition head, and the altitude mixture control shelves are used for centre gripping imbibition head, but rotatable assembly is installed at the top of imbibition head, but rotatable assembly passes through the connecting pipe and is connected with the negative pressure suction apparatus.

2. The depth adjustable pipette tip of claim 1 wherein the pipette tip comprises a pipette, a pipette

The bottom of the tube is a tip, and the straw is provided with scale marks.

3. The adjustable depth pipette tip of claim 2 wherein said pipette tip has a height slidably engaged therewith

The degree adjustment gear is provided with a through hole, and the inner diameter of the through hole is smaller than the outer diameter of the suction pipe.

4. The depth adjustable pipette tip of claim 3 wherein said pipette tip is provided with an external thread on top

Threads, the external threads for threaded rotational connection with the rotatable component.

5. The depth adjustable suction head of claim 4, wherein said rotatable assembly comprises a sleeve,

the inner side of the bottom of the sleeve is provided with an internal thread, the sleeve is in thread running fit with the suction pipe, and the top end of the sleeve is connected with the negative pressure suction apparatus through a connecting pipe.

6. The adjustable depth pipette tip of claim 5 wherein a stop ring is mounted within said sleeve,

the inner diameter of the limiting ring is equal to the inner diameter of the suction pipe in size, and a filter membrane is matched in the sleeve in a sliding mode and used for filtering solid and macromolecular substances.

7. The adjustable depth pipette tip of claim 6 wherein the outer wall of the pipette is provided with a frosted layer.

8. The adjustable depth tip of claim 7, wherein the sleeve has a suction member disposed thereon.

9. The adjustable depth suction head of claim 8, wherein the suction member is a suction cup and is disposed on an end or a side wall of the sleeve to achieve suction of the suction cup at the slippery surface, wherein the suction cup may be provided with one or more suction cups.

10. The adjustable depth pipette tip of claim 8 wherein the attraction member is a magnet and is disposed on the end or side wall of the sleeve to effect attraction of the magnet to the surface of an iron or opposite magnet.

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