CN216024964U - Easily-installed replaceable pipette tip - Google Patents

Abstract

The utility model discloses an easily-assembled replaceable pipette head, which comprises an upper pipe body, a fixing ring and a lower pipe body, wherein the upper end of the upper pipe body is connected with the fixing ring, the lower end of the upper pipe body is connected with the lower pipe body, the inner wall of the upper end of the upper pipe body is fixedly connected with a first elastic sealing layer, the middle part of the inner wall of the first elastic sealing layer is fixedly connected with a second elastic sealing layer, the outer wall of the lower end of the upper pipe body is provided with a first external thread, the inner wall of the upper end of the lower pipe body is provided with a first internal thread, the first external thread is in clearance fit with the first internal thread, the outer wall of the upper end of the upper pipe body is provided with a second external thread, the inner wall of the fixing ring is provided with a second internal thread, and the second external thread is in clearance fit with the second internal thread. The utility model discloses an easily-installed and replaceable pipette head, which is convenient for installing and replacing the pipette head, and has good internal sealing performance and stronger practicability.

Description

Easily-installed replaceable pipette tip

Technical Field

The utility model relates to the technical field of pipette heads, in particular to an easily-installed replaceable pipette head.

Background

Pipettes are the most common pipetting equipment in experiments, almost every biological laboratory worker uses the pipettes every day, and the consumable material matched with the pipettes is a plastic sucker. The principle of the liquid transfer device is a piston movement, when a suction head is assembled on the liquid transfer device, the piston in the liquid transfer device sucks a section of air, and the suction head can simultaneously suck a section of liquid with the same volume. The whole process requires that the liquid transfer device and the suction head are closed, the inner wall of the suction head is completely attached to the outer wall of the nozzle part of the liquid transfer device, and the tightness of a communication space is guaranteed. Typically, the pipette tip is injection molded from polypropylene plastic, and the pipette tip features are machined from metal or injection molded from plastic. The fit degree between the pipette nozzle part and the suction head is the key for the smooth operation of the whole system. In the actual use process, the sealing performance between the pipette nozzle part and the plastic sucker is damaged mainly by two conditions: wear of the nozzle parts during long-term use of the pipettor; the mould is not accurate enough in the manufacturing process of plastic suction head, causes the size deviation of plastic suction head inner wall. In addition, the specifications of the nozzle parts of pipettors of different brands in a laboratory have different tolerance sizes, so that the pipette tips cannot be matched to cause air leakage and the pipetting experiment fails, thereby influencing the correctness or accuracy of the experiment result, and the defects exist.

The prior patent (publication number: CN214159664U) discloses a pipette tip which is convenient to produce and manufacture, can improve the sealing performance with a pipette nozzle part and ensures successful pipetting action. Pipettor suction head includes that extra quality moulds plastics integrated into one piece's elastic sealing body 1 and imbibition body 2, imbibition body 2 parcel is lived elastic sealing body 1, elastic sealing body 1 can with pipettor mouthpiece part looks adaptation. The utility model can be widely applied to the field of biological experiments.

However, this device is not easy to replace the pipetting head and there is a risk that the pipetting head will fall off during use, for which purpose an improvement of the prior art is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides an easily-installed replaceable liquid-transfering head.

In order to achieve the purpose, the utility model adopts the following technical scheme: the liquid transfering device head can be replaced to easy dress, including last body, solid fixed ring and lower body, solid fixed ring is connected to the upper end of going up the body, the body is down connected to the lower extreme of going up the body, the first elastic sealing layer of inner wall fixedly connected with of last body upper end, the middle part fixedly connected with second elastic sealing layer of first elastic sealing layer inner wall.

As a further description of the above technical solution:

the lower end outer wall of the upper pipe body is provided with a first external thread, the upper end inner wall of the lower pipe body is provided with a first internal thread, and the first external thread is in clearance fit with the first internal thread.

As a further description of the above technical solution:

the outer wall of the upper end of the upper pipe body is provided with a second external thread, the inner wall of the fixing ring is provided with a second internal thread, and the second external thread is in clearance fit with the second internal thread.

As a further description of the above technical solution:

the inner fixed connecting device at the lower end of the upper pipe body is provided with a filter screen.

As a further description of the above technical solution:

the outer wall device of the front end of the lower part of the upper pipe body is provided with a capacity graduated scale.

As a further description of the above technical solution:

and a second wear-resistant layer is arranged on the outer wall of the upper pipe body close to the upper end.

As a further description of the above technical solution:

a first wear-resistant layer is arranged at the upper end of the outer wall of the lower pipe body.

As a further description of the above technical solution:

the first elastic sealing layer and the second elastic sealing layer are made of thermoplastic elastomer materials through injection molding.

The utility model has the following beneficial effects:

1. according to the utility model, the first elastic sealing layer and the second elastic sealing layer are arranged, so that the first elastic sealing layer and the second elastic sealing layer are combined to effectively seal the liquid transfer head during operation, and the liquid transfer gun and the liquid transfer head are connected more tightly, thereby greatly improving the accuracy or correctness of experimental results.

2. According to the utility model, the first external thread, the second external thread and the lower pipe body are arranged, when the liquid transferring head is used for liquid taking, but solutions with different viscosities are encountered, when the solution viscosity is higher, the lower pipe body is rotated, the first external thread and the first internal thread are not in clearance fit, and meanwhile, the lower pipe body is taken out, so that liquid can be taken independently through the upper pipe body, the time for replacing the liquid transferring head can be saved, the liquid transferring efficiency is greatly improved, and the working time is saved.

3. According to the utility model, the second external thread, the fixing ring and the second internal thread are arranged, when a worker sucks a solution into the pipetting head, the fixing ring and the pipetting gun are fixed from the outside by rotating the fixing ring, so that the pipetting head cannot fall off due to shaking or collision in the moving process, and the stability of the pipetting head is greatly improved.

Drawings

FIG. 1 is an isometric view of an easily replaceable pipette head according to the present invention;

FIG. 2 is a front cross-sectional view of an easily attachable and replaceable pipette head in accordance with the present invention;

FIG. 3 is an isometric view of a first external thread of an easily replaceable pipette head according to the present invention;

FIG. 4 is an isometric view of the lower tube body of the easily replaceable pipette head of the present invention;

FIG. 5 is an isometric view of an easily replaceable pipette head securing ring in accordance with the present invention;

fig. 6 is an enlarged view of a portion a in fig. 2.

Illustration of the drawings:

1. a pipe body is arranged; 2. a fixing ring; 3. a lower pipe body; 4. a first elastomeric sealing layer; 5. a second elastomeric sealing layer; 6. a filter screen; 7. a first external thread; 8. a first internal thread; 9. a second external thread; 10. a second internal thread; 11. a capacity scale; 12. a first wear resistant layer; 13. a second wear resistant layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-6, one embodiment of the present invention is provided: liquid-transfering device head can be replaced to easy dress, including upper tube body 1, solid fixed ring 2 and lower tube body 3, solid fixed ring 2 is connected to the upper end of upper tube body 1, lower tube body 3 is connected to the lower extreme of upper tube body 1, the first elastic sealing layer 4 of inner wall fixedly connected with of upper tube body 1 upper end, the middle part fixedly connected with second elastic sealing layer 5 of the 4 inner walls of first elastic sealing layer, combine effectual effect to moving liquid head sealing of having played in during operation first elastic sealing layer 4 and second elastic sealing layer 5, it is inseparabler that the dual guarantee moved liquid rifle and move between the liquid head, thereby experimental result's exactness or accuracy have been improved greatly.

Go up body 1's lower extreme outer wall and seted up first external screw thread 7, first internal thread 8 has been seted up to lower body 3's upper end inner wall, first external screw thread 7 and 8 clearance fit of first internal thread, can need get liquid through the pipetting head when the during operation, but can meet the solution of different viscosities, when meetting the solution viscosity higher time, body 3 under through rotating, first external screw thread 7 and first internal thread 8 are not clearance fit this moment, body 3 is taken out down simultaneously, just can get liquid through last body 1 solitary at this moment, thereby can save the time of changing the pipetting head, thereby the efficiency of moving the liquid has been improved greatly, the time of work has been saved.

Go up body 1's upper end outer wall and seted up second external screw thread 9, second internal thread 10 has been seted up to solid fixed ring 2's inner wall, second external screw thread 9 and second internal thread 10 clearance fit, when the staff has absorbed solution into and move the liquid head, through rotating solid fixed ring 2, make solid fixed ring 2 and liquid-transfering gun fix from the outside to make the liquid-transfering head can not drop because of rocking or collision at the in-process that removes, thereby great improvement move the stability of liquid head.

The working principle is as follows: when the liquid transferring gun is in work, liquid can be taken through the liquid transferring head, but solutions with different viscosities can be encountered, when the solution has higher viscosity, the lower tube body 3 is rotated, the first external thread 7 and the first internal thread 8 are not in clearance fit, and the lower tube body 3 is taken out at the same time, so that the liquid can be taken independently through the upper tube body 1, the time for replacing the liquid transferring head can be saved, the liquid transferring efficiency is greatly improved, the working time is saved, meanwhile, the first elastic sealing layer 4 and the second elastic sealing layer 5 are combined to effectively play a role in sealing the liquid transferring head, the connection between the liquid transferring gun and the liquid transferring head is doubly ensured to be tighter, the correctness or the accuracy of an experimental result is greatly improved, when a worker sucks the solution into the liquid transferring head, the fixing ring 2 and the liquid transferring gun are fixed from the outside by rotating the fixing ring 2, thereby make move the liquid head and can not drop because of rocking or colliding at the in-process that removes to great improvement move the stability of liquid head.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (8)

1. Easily adorn and to replace pipettor head, including last body (1), solid fixed ring (2) and lower body (3), its characterized in that: go up solid fixed ring (2) of upper end connection of body (1), body (3) down are connected to the lower extreme of body (1) of going up, go up the first elastic sealing layer of inner wall fixedly connected with (4) of body (1) upper end, the middle part fixedly connected with second elastic sealing layer (5) of first elastic sealing layer (4) inner wall.

2. An easily attachable replaceable pipette head according to claim 1, wherein: first external screw thread (7) have been seted up to the lower extreme outer wall of going up body (1), first internal thread (8) have been seted up to the upper end inner wall of body (3) down, first external screw thread (7) and first internal thread (8) clearance fit.

3. An easily attachable replaceable pipette head according to claim 1, wherein: go up the upper end outer wall of body (1) and seted up second external screw thread (9), second internal thread (10) have been seted up to the inner wall of solid fixed ring (2), second external screw thread (9) and second internal thread (10) clearance fit.

4. An easily attachable replaceable pipette head according to claim 1, wherein: the internal fixed connecting device at the lower end of the upper pipe body (1) is provided with a filter screen (6).

5. An easily attachable replaceable pipette head according to claim 1, wherein: the outer wall device of the front end of the lower part of the upper pipe body (1) is provided with a capacity graduated scale (11).

6. An easily attachable replaceable pipette head according to claim 1, wherein: and a second wear-resistant layer (13) is arranged on the outer wall of the upper pipe body (1) close to the upper end.

7. An easily attachable replaceable pipette head according to claim 1, wherein: the upper end of the outer wall of the lower pipe body (3) is provided with a first wear-resistant layer (12).

8. An easily attachable replaceable pipette head according to claim 1, wherein: the first elastic sealing layer (4) and the second elastic sealing layer (5) are made of thermoplastic elastomer materials through injection molding.

Images