Quantitative eight-connection straw

Abstract

The utility model discloses a quantitative eight-connection suction pipe, which belongs to the technical field of pcr eight-connection pipes, and comprises an eight-connection pipe, eight quantitative suction pipe components, transverse communicating pipes, a pressing piece and a vertical communicating pipe, the eight quantitative suction pipe components are connected through the transverse communicating pipes, the upper end of the transverse communicating pipe at the middle end is fixedly connected with the vertical communicating pipe, and the lower end of the transverse communicating pipe at the middle end is fixedly connected with the pressing piece. And the transverse communicating pipe is communicated with the pressing piece through a vertical communicating pipe. By means of the mode, the pressing piece, the liquid storage tank and the buffer tank are adopted to suck liquid in a negative pressure mode, quantitative liquid suction is achieved, the phenomenon of excessive liquid suction is avoided, the angle between the quantitative communicating pipe and the quantitative straight pipes is arranged, errors are avoided, meanwhile, it is guaranteed that the liquid can smoothly enter and exit from the liquid storage tank, and the eight quantitative straight pipes can suck and transfer liquid at the same time; the operation efficiency is greatly improved, the operation steps are simplified, the connecting piece provides rigid support for the whole eight-connection straw, the strength of the eight-connection straw is enhanced, meanwhile, the eight-connection straw can be conveniently held by hand for operation, and the production process difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PCR eight-connected tubes, in particular to a quantitative eight-connected pipette. Background Art

[0002] At present, nucleic acid testing mainly uses PCR or isothermal amplification method. The reaction tubes used in the reaction are generally 200-microliter transparent centrifuge eight-tubes with caps. The eight-tubes usually refer to eight-tubes arranged in a strip. The eight-tubes can perform multiple PCR reactions at the same time to improve experimental efficiency. The eight-tubes are usually marked to clearly identify each reaction tube, which is convenient for experimental operations and data recording.

[0003] Chinese patent CN220099004U discloses a PCR eight-tube connection with an integrated tube cover, including a tube body and a tube sheet seat. There are eight tube bodies, and the eight tube bodies are fixed in series by seven connecting rods. Eight tube sheet holes are equidistantly penetrated from left to right at the upper end of the tube sheet seat. The eight tube bodies are respectively inserted into the eight tube sheet holes. Connecting belts are integrally provided on the upper sides of the rear ends of the eight tube bodies. Tube covers are integrally provided on the other ends of the eight connecting belts. The eight tube covers are respectively sealed and plugged in the upper ends of the eight tube bodies.

[0004] However, during the liquid preparation and operation process, a large amount of trace liquid is often required to be absorbed and pipetted. At present, the pipetting operation is mainly completed by a liquid adding gun, but the liquid adding gun is cumbersome to operate and the gun head needs to be replaced according to different required amounts.

[0005] Based on this, the utility model designs a quantitative eight-connected straw to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a quantitative eight-linked straw.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A quantitative eight-connected pipette, comprising eight-connected pipettes;

[0009] It also includes eight quantitative straw assemblies for quantitative liquid aspiration, a horizontal connecting tube for connecting the quantitative straw assemblies, a pressing piece for providing power, and a vertical connecting tube for connecting the horizontal connecting tube and the pressing piece. The eight quantitative straw assemblies are connected by the horizontal connecting tube, the upper end of the middle horizontal connecting tube is fixedly connected to the vertical connecting tube, and the horizontal connecting tube and the pressing piece are connected by the vertical connecting tube.

[0010] Furthermore, the quantitative pipette assembly includes a quantitative straight tube, a liquid suction port, a connecting piece, a liquid storage tank, a buffer connecting pipe, a buffer tank and a quantitative connecting pipe. The lower end of the quantitative straight tube is provided with a liquid suction port, the upper end of the quantitative straight tube is fixedly connected with a connecting piece, the front end of the connecting piece is fixedly connected with the quantitative connecting pipe, the upper and lower ends of the connecting piece are respectively fixedly connected with the buffer tank and the liquid storage tank, the rear end of the connecting piece is fixedly connected with the buffer connecting pipe, the buffer tank and the liquid storage tank are connected through the buffer connecting pipe, the upper end of the quantitative straight tube is connected with the liquid storage tank through the quantitative connecting pipe, and two adjacent buffer tanks are connected through a transverse connecting pipe.

[0011] Furthermore, the distances between two adjacent quantitative straight tubes are the same.

[0012] Furthermore, the highest end of the quantitative straight tube is higher than the highest end of the liquid storage tank.

[0013] Furthermore, the central axis of the quantitative connecting tube and the central axis of the quantitative straight tube form an angle of 30-60 degrees.

[0014] Furthermore, the volume of the pressing member is larger than the total volume of the eight quantitative straight tubes and smaller than the total volume of the eight quantitative straight tubes plus the eight liquid storage tanks.

[0015] Furthermore, the liquid storage tank, the buffer tank and the pressing piece are all elliptical.

[0016] Furthermore, an anti-pollution filter element is fixedly connected in the transverse connecting pipe.

[0017] The utility model has the following technical effects:

[0018] When the utility model is used for quantitative liquid transfer, an eight-connected pipette model of suitable size and volume is selected, the pressing piece is squeezed, and then the eight liquid suction ports are deeply inserted into the liquid surface of the eight-connected pipette containing the liquid to be sucked, and the pressing piece is slowly released until it is completely released. At this time, the liquid in the eight-connected pipette is sucked into the quantitative straight pipe, and the liquid completely fills each quantitative straight pipe, and the excess liquid flows into the liquid storage tank through the quantitative connecting pipe, and the liquid does not enter the buffer connecting pipe, and the liquid suction port is moved out of the liquid surface, and then the eight pipettes are aligned with the designated eight-connected pipes, and the pressing piece is squeezed to squeeze the liquid in the quantitative straight pipe and the liquid storage tank into the eight-connected pipe, and the quantitative liquid transfer is completed;

[0019] The utility model adopts negative pressure of a pressing piece, a liquid storage tank and a buffer tank to attract liquid to realize quantitative liquid suction without excessive liquid suction. The angle setting between the quantitative connecting tube and the quantitative straight tube avoids errors and ensures that the liquid can smoothly enter and exit the liquid storage tank. The eight quantitative straight tubes can simultaneously suck and transfer liquid, greatly improving the operation efficiency and simplifying the operation steps. The connecting piece provides a rigid support for the entire eight-connected straw, enhances the strength of the eight-connected straw, and is convenient for hand-held operation of the eight-connected straw, reducing the difficulty of the production process.

[0020] The utility model has an anti-pollution filter element fixedly connected inside the horizontal connecting pipe, so as to ensure air flow and prevent cross contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The utility model is a three-dimensional quantitative eight-linked straw Figure 1 ;

[0023] Figure 2 It is a front view of a quantitative eight-connected straw of the utility model;

[0024] Figure 3 For along Figure 2 AA direction cross-sectional view;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0026] The numbers in the figure represent:

[0027] 1. Quantitative suction pipe assembly; 11. Quantitative straight pipe; 12. Liquid suction port; 13. Connecting piece; 14. Liquid storage tank; 15. Buffer connecting pipe; 16. Buffer tank; 17. Quantitative connecting pipe; 2. Horizontal connecting pipe; 3. Vertical connecting pipe; 4. Pressing piece; 5. Eight-connecting pipe. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0029] The utility model is further described below in conjunction with embodiments.

[0030] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are from the perspective of the front view.

[0031] In the following implementations, please refer to the instructions for Figure 1-4, a quantitative eight-connected pipette, comprising an eight-connected pipette 5;

[0032] It also includes eight quantitative straw assemblies 1 for quantitative liquid aspiration, a horizontal connecting tube 2 for connecting the quantitative straw assemblies 1, a pressing piece 4 for providing power, and a vertical connecting tube 3 for connecting the horizontal connecting tube 2 and the pressing piece 4. The eight quantitative straw assemblies 1 are connected by the horizontal connecting tube 2, the upper end of the middle horizontal connecting tube 2 is fixedly connected to the vertical connecting tube 3, and the horizontal connecting tube 2 and the pressing piece 4 are connected by the vertical connecting tube 3.

[0033] When in use, the pressing member 4 is squeezed to provide negative pressure in the eight quantitative straw assemblies 1 at the same time;

[0034] The quantitative pipette assembly 1 includes a quantitative straight tube 11, a liquid suction port 12, a connecting piece 13, a liquid storage tank 14, a buffer connecting pipe 15, a buffer tank 16 and a quantitative connecting pipe 17. The lower end of the quantitative straight tube 11 is provided with a liquid suction port 12, the upper end of the quantitative straight tube 11 is fixedly connected with the connecting piece 13, the front end of the connecting piece 13 is fixedly connected with the quantitative connecting pipe 17, the upper and lower ends of the connecting piece 13 are respectively fixedly connected with the buffer tank 16 and the liquid storage tank 14, the rear end of the connecting piece 13 is fixedly connected with the buffer connecting pipe 15, the buffer tank 16 and the liquid storage tank 14 are connected through the buffer connecting pipe 15, the upper end of the quantitative straight tube 11 is connected with the liquid storage tank 14 through the quantitative connecting pipe 17, and the two adjacent buffer tanks 16 are connected through the transverse connecting pipe 2.

[0035] The distances between two adjacent quantitative straight tubes 11 are the same.

[0036] The highest end of the quantitative straight tube 11 is higher than the highest end of the liquid storage tank 14 .

[0037] The quantitative connecting pipe 17 and the quantitative straight pipe 11 form an angle of 30-60 degrees, ensuring that the liquid will not flow back to the quantitative straight pipe 11 after entering the liquid storage tank 14 .

[0038] The volume of the pressing member 4 is larger than the total volume of the eight quantitative straight tubes 11 and smaller than the total volume of the eight quantitative straight tubes 11 and the eight liquid storage tanks 14 .

[0039] Preferably, the liquid storage tank 14, the buffer tank 16 and the pressing piece 4 are all elliptical. The pressing piece 4 is elliptical for easy hand-held operation. The liquid storage tank 14 and the buffer tank 16 are both elliptical to provide a smooth liquid containing cavity and buffer cavity for the liquid, avoiding residue at corners when the liquid is squeezed out.

[0040] When performing quantitative pipetting, select an eight-connected pipette model of appropriate size and volume, squeeze the pressing piece 4, and then push the eight suction ports 12 deep into the liquid surface of the eight-connected tube 5 containing the sucked liquid, slowly release the pressing piece 4 until it is completely released, at which time the liquid in the eight-connected tube 5 is sucked into the quantitative straight tube 11, and the liquid completely fills each quantitative straight tube 11, and the excess liquid flows into the liquid storage tank 14 through the quantitative connecting tube 17, and the liquid does not enter the buffer connecting tube 15, move the suction port 12 out of the liquid surface, and then align the eight 122 with the specified eight-connected tube 5, squeeze the pressing piece 4, squeeze the liquid in the quantitative straight tube 11 and the liquid storage tank 14 into the eight-connected tube 5, and complete the quantitative pipetting;

[0041] The utility model adopts a pressing piece 4, a liquid storage tank 14 and a buffer tank 16 to attract liquid under negative pressure to achieve quantitative liquid aspiration without excessive liquid aspiration. The angle setting between the quantitative connecting tube 17 and the quantitative straight tube 11 avoids errors and ensures that the liquid can smoothly enter and exit the liquid storage tank 14. The eight quantitative straight tubes 11 can simultaneously aspirate and transfer liquid, greatly improving operating efficiency and simplifying operating steps. The connecting piece 13 provides a rigid support for the entire eight-linked straw, enhances the strength of the eight-linked straw, and is also convenient for hand-held operation of the eight-linked straw, reducing the difficulty of the production process.

[0042] An anti-pollution filter element (not shown) is fixedly connected inside the transverse connecting pipe 2.

[0043] The utility model has a transverse connecting pipe 21 fixedly connected with an anti-pollution filter element to ensure air flow and prevent cross contamination.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quantitative eight-linked pipette, comprising an eight-linked pipette (5), characterized in that: It also comprises eight quantitative suction tube assemblies (1) for quantitative liquid aspiration, a transverse connecting tube (2) for connecting the quantitative suction tube assemblies (1), a pressing piece (4) for providing power, and a vertical connecting tube (3) for connecting the transverse connecting tube (2) and the pressing piece (4); the eight quantitative suction tube assemblies (1) are connected via the transverse connecting tube (2); the upper end of the middle transverse connecting tube (2) is fixedly connected to the vertical connecting tube (3); and the transverse connecting tube (2) and the pressing piece (4) are connected via the vertical connecting tube (3); The quantitative suction pipe assembly (1) comprises a quantitative straight pipe (11), a liquid suction port (12), a connecting piece (13), a liquid storage tank (14), a buffer connecting pipe (15), a buffer tank (16) and a quantitative connecting pipe (17); the lower end of the quantitative straight pipe (11) is provided with a liquid suction port (12); the upper end of the quantitative straight pipe (11) is fixedly connected to the connecting piece (13); the front end of the connecting piece (13) is fixedly connected to the quantitative connecting pipe (17); the upper and lower ends of the connecting piece (13) are respectively fixedly connected to the buffer tank (16) and the liquid storage tank (14); the rear end of the connecting piece (13) is fixedly connected to the buffer connecting pipe (15); the buffer tank (16) and the liquid storage tank (14) are connected via the buffer connecting pipe (15); the upper end of the quantitative straight pipe (11) is connected to the liquid storage tank (14) via the quantitative connecting pipe (17); and two adjacent buffer tanks (16) are connected via a transverse connecting pipe (2).

2. The quantitative eight-piece pipette according to claim 1, characterized in that: The distances between two adjacent quantitative straight tubes (11) are the same.

3. The quantitative eight-piece straw according to claim 2, characterized in that: The highest end of the quantitative straight tube (11) is higher than the highest end of the liquid storage tank (14).

4. The quantitative eight-piece straw according to claim 3, characterized in that: The central axis of the quantitative connecting pipe (17) and the central axis of the quantitative straight pipe (11) form an angle of 30-60 degrees.

5. The quantitative eight-piece straw according to claim 4, characterized in that: The volume of the pressing member (4) is greater than the total volume of the eight quantitative straight tubes (11) and less than the total volume of the eight quantitative straight tubes (11) plus the eight liquid storage tanks (14).

6. The quantitative eight-piece pipette according to claim 5, characterized in that: The liquid storage tank (14), the buffer tank (16) and the pressing member (4) are all elliptical in shape.

7. The quantitative eight-piece pipette according to claim 6, characterized in that: An anti-pollution filter element is fixedly connected inside the transverse connecting pipe (2).

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