CN216936088U - Liquid-transfering sucker and liquid-transfering device - Google Patents

Abstract

The utility model belongs to the technical field of experimental instruments, and particularly discloses a liquid transfer suction head which comprises a pipe body and a flow guide structure arranged on the inner wall of the pipe body and used for preventing liquid from attaching to the pipe wall, wherein the flow guide structure comprises a plurality of first bulges distributed on the pipe wall and a plurality of second bulges distributed on the outer surfaces of the first bulges, the adjacent first bulges and the adjacent second bulges are arranged at intervals, and the surface roughness of the first bulges is smaller than that of the second bulges. The flow guide structure designed by the structure forms an extremely thin air layer between the sample and the inner wall of the tube body through the distribution of the first bulges and the second bulges, so that the adhesive force between the sample and the inner wall of the tube body is reduced, and the residue of the sample on the inner wall of the tube body is reduced; the application still provides a move liquid device, and this move liquid device can accomplish the transfer of sample voluntarily, but also can effectively reduce the sample and remain in moving liquid suction head, then makes to move liquid more accurately.

Description

Liquid-transfering sucker and liquid-transfering device

Technical Field

The utility model relates to the technical field of experimental equipment, in particular to a liquid transfer suction head and a liquid transfer device.

Background

When taking a sample to the liquid sample under prior art, because the design of liquid-transfering suction head is unreasonable enough, can cause the sample to remain to liquid-transfering suction head's body inner wall mostly, then not only cause the sample extravagant, also can't guarantee the sample in addition and move the accuracy of liquid measure, still can cause great influence to the experimental result simultaneously.

SUMMERY OF THE UTILITY MODEL

The first purpose of the utility model is to provide a liquid transfer pipette tip which can avoid a sample from remaining on the inner wall of a tube body, thereby avoiding sample waste and improving the accuracy of liquid transfer amount.

A second object of the present invention is to provide a liquid transfer device, which can improve liquid transfer efficiency and accuracy, and avoid waste caused by residual sample.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a liquid-transfering sucker, includes the body, set up in the body inner wall is used for preventing liquid from being attached to the water conservancy diversion structure of pipe wall, the water conservancy diversion structure including distribute in a plurality of first archs of pipe wall, and distribute in a plurality of second of first protruding surface are protruding, adjacent between the first arch, and adjacent equal interval sets up between the second arch, just first bellied roughness is less than the bellied roughness of surface of second.

And the distance between every two adjacent first bulges and the distance between every two adjacent second bulges are set to be 6-12 micrometers.

The outer diameter of the first protrusion is set to be 6-12 micrometers, and the outer diameter of the second protrusion is set to be 0.6-1.2 micrometers.

The suction nozzle is arranged at the two ends of the body, and the suction nozzle is coaxially and integrally arranged at the two ends of the body.

A liquid transfer device, which comprises the liquid transfer pipette tip and an automatic liquid transfer pipette tip matched with the liquid transfer pipette tip; the liquid suction end of the automatic liquid-transfering suction head is inserted into the tube head of the liquid-transfering suction head and is in sealed clamping connection with the tube head.

And the peripheral surface above the liquid suction end is provided with a positioning step, and the positioning step is abutted against the edge of the port of the tube head.

The outer peripheral face of the liquid suction end is provided with an annular bulge, and the annular bulge is clamped with an annular groove formed in the inner wall of the tube head.

Wherein, automatic liquid-transfering suction head includes that the lower extreme inserts and locates the suction tube of tube head, and with suction tube sliding fit's piston rod.

The automatic liquid transfer suction head is provided with a plurality of automatic liquid transfer suction heads which are connected with the multi-shaft manipulator, and a plurality of liquid sample boxes are arranged below the automatic liquid transfer suction heads.

The utility model has the beneficial effects that: the utility model discloses a liquid transfer suction head, which comprises a pipe body and a flow guide structure arranged on the inner wall of the pipe body and used for preventing liquid from attaching to the pipe wall, wherein the flow guide structure comprises a plurality of first bulges distributed on the pipe wall and a plurality of second bulges distributed on the outer surfaces of the first bulges, the adjacent first bulges and the adjacent second bulges are arranged at intervals, and the surface roughness of the first bulges is smaller than that of the second bulges. The flow guide structure designed by the structure forms an extremely thin air layer between the sample and the inner wall of the tube body through the distribution of the first bulges and the second bulges, so that the adhesive force between the sample and the inner wall of the tube body is reduced, and the residue of the sample on the inner wall of the tube body is reduced; this application still provides a liquid-transfering device, and this liquid-transfering device can accomplish the transfer of sample voluntarily, but also can effectively reduce the sample and remain in pipetting tip, makes to move the liquid more accurately then.

Drawings

Fig. 1 is a schematic structural diagram of a pipetting device provided in this embodiment.

FIG. 2 is a schematic view of the pipette tip of FIG. 1 in a configuration after it is mated with an automatic pipette tip.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a partially enlarged view at B in fig. 2.

In the figure:

1. a pipe body; 11. a body; 12. a pipe head; 13. a suction nozzle; 141. a first protrusion; 142. a second protrusion; 2. a droplet; 100. automatically pipetting a pipette tip; 110. a suction tube; 1101. an annular projection; 1102. a step; 120. a piston rod; 200. a multi-axis manipulator; 300. a liquid sample cartridge.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

FIG. 1 is a schematic structural view of a pipetting device provided in this embodiment; FIG. 2 is a schematic view of the pipette tip of FIG. 1 in a configuration in which it is mated with an automated pipette tip; FIG. 3 is an enlarged view of a portion of FIG. 2 at A; fig. 4 is a partially enlarged view at B in fig. 2. Referring to fig. 1 to 4, the present embodiment provides a pipette tip, which comprises a tube body 1 and a flow guide structure disposed on an inner wall of the tube body 1 for preventing liquid from adhering to a tube wall, and the present embodiment can effectively reduce sample waste caused by residual tube wall of the sample by the arrangement of the flow guide structure.

Preferably, the flow guiding structure in this embodiment includes a plurality of first protrusions 141 distributed on the pipe wall, and a plurality of second protrusions 142 distributed on the outer surface of the first protrusions 141, the first protrusions 141 and the second protrusions 142 are arranged at intervals, and the surface roughness of the first protrusions 141 is smaller than that of the second protrusions 142. Further preferably, the distance between the adjacent first protrusions 141 and the distance between the adjacent second protrusions 142 are both set to be 6 to 12 micrometers, the outer diameter of the first protrusions 141 is set to be 6 to 12 micrometers, and the outer diameter of the second protrusions 142 is set to be 0.6 to 1.2 micrometers. The flow guide structure with the structure can enable air to fill the gaps between the adjacent first protrusions 141 and the adjacent second protrusions 142, and then an air layer is formed between the air layer and the liquid drops 2 in the tube body 1, in addition, the diameters of the liquid drops 2 in the tube body 1 are larger than 1 millimeter, and the outer diameters of the first protrusions 141 and the second protrusions 142 are smaller than the diameters of the liquid drops 2, so that the liquid drops 2 can only be in point contact with the first protrusions 141 and the second protrusions 142, and cannot be completely attached to the surfaces of the first protrusions 141 and the second protrusions 142, and therefore the liquid drops 2 cannot be soaked on the tube wall of the tube body 1, and the liquid drops 2 form a spherical body under the action of the surface tension of the liquid drops 2, and when the liquid-moving head is used for moving the liquid drops 2 out of the liquid-moving head, the liquid drops cannot be adsorbed by the tube wall. And then the waste of the sample caused by adsorbing the residual tube wall when the sample is pipetted is effectively avoided.

Further preferably, the tube body 1 in this embodiment is mainly composed of a body 11, and a tube head 12 and a suction nozzle 13 coaxially and integrally disposed at two ends of the body 11, in order to increase the pressure during liquid discharging and prevent the sample from remaining in the suction nozzle 13, preferably, the inner diameter of the cavity of the suction nozzle 13 in this embodiment is smaller than the inner diameter of the cavity of the body 11, and the suction nozzle 13 is disposed in a slender shape.

The embodiment also provides a liquid transfer device, which comprises the liquid transfer pipette tip and an automatic liquid transfer pipette tip 100 matched with the liquid transfer pipette tip; preferably, the plurality of automatic pipette tips 100 in the present embodiment are mounted on the multi-axis robot 200 and driven by the multi-axis robot 200, and the plurality of liquid sample cassettes 300 are further mounted below the plurality of automatic pipette tips 100, so that the plurality of automatic pipette tips 100 are driven by the multi-axis robot 200 to pipette the liquid in the liquid sample cassettes 300 below, thereby effectively improving the pipetting efficiency.

In order to improve pipetting accuracy and reduce the deformation of the pipette tip 12, preferably, the pipetting end of the automatic pipette tip 100 in this embodiment is inserted into the pipette tip 12 and is in sealed engagement with the pipette tip 12; further preferably, in the present embodiment, a positioning step 1102 is provided on the outer peripheral surface above the liquid suction end of the automatic pipette tip 100, and the positioning step 1102 abuts against the port edge of the tube head 12, so as to define the mounting position of the pipette tip, and to make the lengths of the plurality of pipette tips after mounting uniform, that is, the liquid suction ports of the suction nozzles 13 of the pipette tips are maintained in the same plane as much as possible.

In order to facilitate the engagement of the pipette tip with the pipetting tip of the automatic pipette tip 100, it is preferable that the present embodiment further comprises an annular projection 1101 on the outer peripheral surface of the pipetting tip, the annular projection 1101 is engaged with an annular groove provided on the inner wall of the tip 12, and the annular projection 1101 may be formed of minute projections densely arranged, thereby minimizing the deformation of the tip 12 of the pipette tip.

In addition, this embodiment is used for the above-mentioned automatic liquid-transfering tip 100 with liquid-transfering tip matched with, mainly by one end insert locate the suction tube 110 in the tube head 12 to and slide and set up in the cavity of suction tube 110 with the piston rod 120 of suction tube 110 sliding fit, when the piston rod 120 receives the drive division drive of multi-axis manipulator 200, can pass through the just can move the liquid to the sample of atmospheric pressure in the suction tube 110, the relevant multi-axis manipulator 200 of this embodiment and the concrete structure setting of automatic liquid-transfering tip 100, all comparatively commonly used in the correlation technique, do not do specific details here.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. The utility model provides a liquid-transfering sucker, its characterized in that, including body (1), set up in body (1) inner wall is used for preventing liquid from being attached to the water conservancy diversion structure of pipe wall, the water conservancy diversion structure including distribute in a plurality of first archs (141) of pipe wall, and distribute in a plurality of second arch (142) of first arch (141) surface, adjacent between first arch (141), and adjacent equal interval sets up between second arch (142), just the roughness of the surface of first arch (141) is less than the roughness of the surface of second arch (142).

2. A pipette tip according to claim 1, wherein the pitch between adjacent first projections (141) and adjacent second projections (142) is set to 6 to 12 μm.

3. A pipette tip according to claim 1, wherein the outer diameter of the first projection (141) is set to 6 to 12 μm and the outer diameter of the second projection (142) is set to 0.6 to 1.2 μm.

4. A pipette tip according to claim 1, wherein said tubular body (1) comprises a body (11), and a tip (12) and a suction nozzle (13) coaxially and integrally provided at both ends of said body (11), said suction nozzle (13) having a cavity inner diameter smaller than that of said body (11).

5. A pipetting device comprising a pipetting tip according to any one of claims 1 to 4 and an automatic pipetting tip (100) cooperating with said pipetting tip; the liquid suction end of the automatic liquid suction head (100) is inserted into a tube head (12) of the liquid suction head and is in sealed clamping connection with the tube head (12).

6. A pipetting device as recited in claim 5, characterised in that the peripheral surface above the pipetting end is provided with a positioning step (1102), and the positioning step (1102) abuts against the port edge of the cartridge (12).

7. A pipetting device as recited in claim 5, characterised in that the outer peripheral surface of the pipetting tip is provided with an annular projection (1101), and the annular projection (1101) engages with an annular groove provided in the inner wall of the cartridge (12).

8. A pipetting device as recited in claim 5 wherein the automatic pipetting tip (100) comprises a pipette tip (110) inserted at a lower end into the tip (12) and a piston rod (120) slidably engaged with the pipette tip (110).

9. A pipetting device as recited in claim 5 wherein the automatic pipetting tip (100) is provided in plurality, a plurality of the automatic pipetting tips (100) are each connected to the multi-axis robot (200), and a liquid sample cartridge (300) is provided below each of the plurality of the automatic pipetting tips (100).

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