Sealed pipette tip

Abstract

The utility model discloses a sealed pipette tip, and relates to the technical field of pipette tips, the sealed pipette tip comprises a quantitative pipette, the bottom of the quantitative pipette is fixedly communicated with a connecting pipe, the upper position of the inner wall of the quantitative pipette is provided with a second internal thread, and a sealing assembly is arranged in the quantitative pipette; the sealing assembly comprises a sealing ring fixedly connected to the inner wall of the quantitative pipette, the inner wall of the quantitative pipette is fixedly connected with a limiting ring below the second internal thread, the limiting ring is fixedly connected with a communicating ring, the communicating ring is fixedly communicated with the sealing ring, and the sealing ring is filled with nitrogen. When the quantitative pipette is screwed into the bottom of the pipette and moves upwards, the bottom connector of the pipette extrudes the communicating ring, and air in the communicating ring is pressed into the sealing ring, so that the sealing ring is expanded and enlarged, the sealing performance of the joint of the quantitative pipette and the pipette is improved, leakage is avoided, and the quantitative pipette is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid transfer gun tips, in particular to a sealed liquid transfer gun tip. Background Art

[0002] A pipette is a type of pipette, commonly used to transfer small or trace amounts of liquid in the laboratory. Different specifications of pipettes are equipped with different sized pipette tips. The shapes produced by different manufacturers are also slightly different, but the working principles and operating methods are basically the same. The pipette is a precision instrument and must be used and stored with caution to prevent damage and avoid affecting its range.

[0003] After searching the existing public patent number: CN201921607152.2, the public patent name is: an anti-backdrawing pipette tip, including a tip body, characterized in that: the tip body includes a detachably connected interface section and a liquid suction section, the lower part of the interface section is provided with an outwardly convex buffer section, the buffer section is provided with an annular bottom plate, the bottom plate and the lower side wall of the buffer section are enclosed to form an annular groove, an elastic sealing ring is provided in the groove, the outer side wall of the liquid suction section is sealed with the inner side wall of the sealing ring, the lower end of the liquid suction section is provided with a liquid suction port, the upper part of the liquid suction section is provided with a guide section, the guide section is curved upward and gradually shrinks toward the center of the tip body. The utility model has a simple structure and is easy to use. By designing the buffer section, it can prevent liquid from being drawn back into the pipette, thereby preventing liquid contamination.

[0004] However, the above device has certain shortcomings, such as the loose connection between the pipette tip and the handle at the lower end of the pipette, which is easy to fall off or leak. It is not convenient to blow the cells at the edge corners of the culture tank without designing an elbow, and the sampling collection rate is poor. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a sealed liquid transfer gun tip, which solves the problem of easy falling off or liquid leakage and no elbow design.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a sealed pipette tip, comprising: a quantitative pipette, the bottom of the quantitative pipette is fixedly connected with a connecting tube, the inner wall of the quantitative pipette is provided with a second internal thread at the upper position, and a sealing component is arranged in the quantitative pipette;

[0009] The sealing assembly includes a sealing ring fixedly connected to the inner wall of the quantitative pipette, the inner wall of the quantitative pipette is fixedly connected to a limiting ring below the second internal thread, the limiting ring is fixedly connected to a connecting ring, the connecting ring is fixedly connected to the sealing ring and the sealing ring is filled with nitrogen.

[0010] Preferably, a sealing block is provided in the quantitative pipette, a sealing cover is fixedly connected to the top of the sealing block, and a second external thread threadably connected to the second internal thread is provided on the surface of the sealing block.

[0011] Preferably, the quantitative pipette is provided with an anti-backflow component, the anti-backflow component includes a collecting box, the collecting box is symmetrically arranged on the surface of the quantitative pipette, a reflux port is opened on the surface of the quantitative pipette, and absorbent cotton is fixedly connected to the collecting box.

[0012] Preferably, the lowest point of the collection box is lower than the lowest point of the reflux port, and a filter is fixedly connected to the interior of the quantitative pipette above the reflux port.

[0013] Preferably, the quantitative pipette is provided with a connecting assembly, the connecting assembly comprises a bent pipe, the bent pipe is arranged on the surface of the connecting pipe, and a first internal thread is opened in the bent pipe.

[0014] Preferably, the surface of the connecting pipe is provided with a first external thread matching the first internal thread, and a sealing ring is provided inside the bent pipe.

[0015] Preferably, the quantitative pipette, the connecting tube and the curved tube are all made of glass or hard plastic.

[0016] Beneficial Effects

[0017] The utility model provides a sealed liquid transfer gun head, which has at least the following advantages compared with the prior art:

[0018] Beneficial effects:

[0019] Screw the quantitative pipette into the bottom of the pipette. When the quantitative pipette moves upward, the interface at the bottom of the pipette squeezes the connecting ring, and the air inside the connecting ring is pressed into the sealing ring, causing the sealing ring to expand and become larger, thereby increasing the sealing performance of the connection between the quantitative pipette and the pipette, avoiding leakage, and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a cross-sectional view of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the anti-backflow component of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the reflux port of the utility model.

[0024] In the figure: 1. quantitative pipette; 3. connecting tube; 4. first external thread; 5. sealing assembly; 501. sealing ring; 502. limiting ring; 503. connecting ring; 6. anti-backflow assembly; 601. collecting box; 602. reflux port; 603. filter screen; 604. absorbent cotton; 7. sealing cover; 8. sealing block; 9. second external thread; 10. connecting assembly; 1001. elbow; 1002. first internal thread; 11. second internal thread. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1:

[0027] See also Figure 1-4 The utility model provides a technical solution: a quantitative pipette 1, a connecting tube 3 is fixedly connected to the bottom of the quantitative pipette 1, a second internal thread 11 is opened at the upper position of the inner wall of the quantitative pipette 1, and a sealing component 5 is arranged in the quantitative pipette 1; the sealing component 5 includes a sealing ring 501 fixedly connected to the inner wall of the quantitative pipette 1, a limiting ring 502 is fixedly connected to the inner wall of the quantitative pipette 1 below the second internal thread 11, a connecting ring 503 is fixedly connected to the limiting ring 502, the connecting ring 503 is fixedly connected to the sealing ring 501, and the sealing ring 501 is filled with nitrogen.

[0028] Analysis of the above content: When the quantitative pipette 1 is connected to the pipette, the second internal thread 11 is used to move the quantitative pipette 1 toward the pipette. During the movement of the quantitative pipette 1, the connecting ring 503 contacts the pipette interface and squeezes the connecting ring 503. The air in the connecting ring 503 is pressed into the sealing ring 501, causing the sealing ring 501 to expand and become larger, thereby increasing the sealing between the quantitative pipette 1 and the pipette.

[0029] Embodiment 2:

[0030] See also Figure 1-4 The utility model provides a technical solution based on the first embodiment: a sealing block 8 is arranged in the quantitative pipette 1, a sealing cover 7 is fixedly connected to the top of the sealing block 8, and a second external thread 9 threadably connected to the second internal thread 11 is arranged on the surface of the sealing block 8.

[0031] Analysis of the above content: When not in use, the sealing block 8 is screwed into the quantitative pipette 1 to protect the quantitative pipette 1 and avoid contamination of the quantitative pipette 1, thereby playing a protective role.

[0032] Embodiment three:

[0033] See also Figure 1-4 The utility model provides a technical solution based on the first embodiment: an anti-backflow component 6 is arranged in the quantitative pipette 1, and the anti-backflow component 6 includes a collecting box 601. The collecting box 601 is symmetrically arranged on the surface of the quantitative pipette 1. A reflux port 602 is opened on the surface of the quantitative pipette 1, and an absorbent cotton 604 is fixedly connected in the collecting box 601.

[0034] Analysis of the above content: The collection box 601 is provided to prevent the liquid from flowing back into the pipette, and the absorbent cotton 604 is provided to absorb the backflowing liquid.

[0035] Embodiment 4:

[0036] See also Figure 1-4 The utility model provides a technical solution based on the first embodiment: the lowest point of the collection box 601 is lower than the lowest point of the reflux port 602 , and a filter screen 603 is fixedly connected to the inside of the quantitative pipette 1 above the reflux port 602 .

[0037] Analysis of the above content: The refluxed liquid flows into the collection box 601 and is absorbed by the absorbent cotton 604, thereby avoiding contamination caused by liquid outflow when the quantitative pipette 1 is not in use.

[0038] Embodiment five:

[0039] See also Figure 1-4 The utility model provides a technical solution based on the first embodiment: a connecting assembly 10 is provided on the quantitative pipette 1, and the connecting assembly 10 includes a curved pipe 1001, which is arranged on the surface of the connecting pipe 3, and a first internal thread 1002 is opened in the curved pipe 1001.

[0040] Analysis of the above content: The curved tube 1001 is connected to the connecting tube 3 via the first internal thread 1002, and the curved tube 1001 is used to facilitate blowing and beating of cells growing on the edge of the culture tank wall, thereby improving the cell collection rate.

[0041] Embodiment six:

[0042] See also Figure 1-4 The utility model provides a technical solution based on the first embodiment: the surface of the connecting tube 3 is provided with a first external thread 4 matching the first internal thread 1002, and a sealing ring is provided in the curved tube 1001. The quantitative pipette 1, the connecting tube 3 and the curved tube 1001 are all made of glass or hard plastic.

[0043] Analysis of the above content: A sealing ring is provided to increase the sealing between the curved pipe 1001 and the connecting pipe 3 to prevent the outflow of liquid.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealed pipette tip, characterized in that: include: A quantitative pipette (1), wherein a connecting tube (3) is fixedly connected to the bottom of the quantitative pipette (1), a second internal thread (11) is provided at an upper position of the inner wall of the quantitative pipette (1), and a sealing component (5) is provided inside the quantitative pipette (1); The sealing assembly (5) comprises a sealing ring (501) fixedly connected to the inner wall of the quantitative pipette (1); the inner wall of the quantitative pipette (1) is located below the second internal thread (11) and is fixedly connected to a limiting ring (502); a connecting ring (503) is fixedly connected to the limiting ring (502); the connecting ring (503) is fixedly connected to the sealing ring (501), and the sealing ring (501) is filled with nitrogen.

2. A sealed pipette tip according to claim 1, characterized in that: A sealing block (8) is arranged inside the quantitative pipette (1), a sealing cover (7) is fixedly connected to the top of the sealing block (8), and a second external thread (9) threadably connected to the second internal thread (11) is arranged on the surface of the sealing block (8).

3. A sealed pipette tip according to claim 1, characterized in that: The quantitative pipette (1) is provided with an anti-backflow component (6), the anti-backflow component (6) comprises a collection box (601), the surface of the quantitative pipette (1) is symmetrically provided with the collection box (601), the surface of the quantitative pipette (1) is provided with a reflux port (602), and the collection box (601) is fixedly connected with absorbent cotton (604).

4. A sealed pipette tip according to claim 3, characterized in that: The lowest point of the collection box (601) is lower than the lowest point of the reflux port (602), and a filter screen (603) is fixedly connected to the inside of the quantitative pipette (1) above the reflux port (602).

5. A sealed pipette tip according to claim 1, characterized in that: The quantitative pipette (1) is provided with a connection assembly (10), wherein the connection assembly (10) comprises a curved tube (1001), wherein the curved tube (1001) is arranged on the surface of the connecting tube (3), and wherein a first internal thread (1002) is provided in the curved tube (1001).

6. A sealed pipette tip according to claim 5, characterized in that: The surface of the connecting pipe (3) is provided with a first external thread (4) matching the first internal thread (1002), and a sealing ring is provided inside the bent pipe (1001).

7. A sealed pipette tip according to claim 5, characterized in that: The quantitative pipette (1), the connecting tube (3) and the curved tube (1001) are all made of glass or hard plastic.

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