Pipetting device for pipette

Abstract

The utility model provides a pipetting device for a pipette, which relates to the technical field of experimental instruments and comprises a U-shaped tube, and the U-shaped tube comprises a liquid inlet end communicated with the atmosphere and a pipette connecting end used for connecting the pipette; a plurality of pipetting valves are arranged at the pipette connecting end and are used for controlling the opening and closing of the pipette connecting end; the vertical distance between the plane where the atmosphere communicating end is located and the plane where the pipetting valve is located is larger than or equal to the distance between the pipette opening and the pipette marking line. By means of the communicating vessel principle of the U-shaped pipe, liquid at the connecting end of the pipette enters the pipette and rises to the height the same as the liquid level of the liquid inlet end, and liquid suction is achieved. The pipetting valve is arranged to control opening and closing of the connecting end of the pipette, liquid in the U-shaped pipe is prevented from overflowing, and continuous pipetting operation can be carried out after liquid is continuously added. A plurality of pipetting valves can be simultaneously used for pipetting according to specific requirements, so that the technical problem of low efficiency of a wide-range single-marking pipette during repeated pipetting in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental instruments, in particular to a pipetting device for a pipette. Background Art

[0002] Due to the structure of a single-mark pipette (or pipette) itself and the requirement of precision, it usually takes a certain amount of time for a person to operate a single pipette for liquid suction and discharge. The use of large-capacity pipettes (50 mL and 100 mL single-mark pipettes) requires even more time and manpower.

[0003] In practical applications, there will also be situations where it is necessary to perform multiple pipettings on the same liquid. In this case, the use of large-capacity single-mark pipettes will consume more time. How to improve the efficiency of multiple repeated pipettings on the same liquid has become the key to improving the overall experimental efficiency.

[0004] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] One of the purposes of the present utility model is to provide a pipetting device for a pipette to solve the technical problem of low efficiency of large-capacity single-mark pipettes in multiple repeated pipettings in the prior art.

[0006] To achieve the above object of the present utility model, the following technical solutions are specifically adopted:

[0007] On the one hand, the present utility model provides a pipetting device for a pipette, including a U-shaped tube. The U-shaped tube includes a liquid inlet end communicating with the atmosphere and a pipette connection end for connecting the pipette;

[0008] A plurality of pipetting valves are provided at the pipette connection end for controlling the opening and closing of the pipette connection end;

[0009] The vertical distance between the plane where the atmosphere communication end is located and the plane where the pipetting valves are located is ≥ the distance between the pipette orifice and the pipette marking.

[0010] Further, a connection clamping plate is provided at the pipette connection end, and a plurality of the pipetting valves are arranged on the connection clamping plate.

[0011] Further, the outer diameter of the connection clamping plate matches the inner diameter of the pipette connection end.

[0012] Further, a fixed clamping plate is further provided at the pipette connection end above the connection clamping plate;

[0013] An operation opening is provided at the pipette connection end and is located at the corresponding position above the connection clamping plate and the fixed clamping plate;

[0014] On the side of the fixed clamping plate opposite to the operation port, there are a number of card slots corresponding to the pipetting valve. The inner diameter of the card slot matches the outer diameter of the non-bulb part of the pipette. The notch of the card slot 16 is arranged opposite to the operation port 22.

[0015] Furthermore, at the notch of the card slot, there are oppositely arranged blocking structures, and the distance between the oppositely arranged blocking structures < the outer wall diameter of the non-bulb part of the pipette.

[0016] Furthermore, the liquid inlet end is provided with an end cap, and the end cap is provided with a liquid inlet and a communication port.

[0017] Furthermore, the bottom of the U-shaped tube is provided with a liquid outlet.

[0018] Furthermore, valves are respectively arranged at the liquid inlet and the liquid outlet.

[0019] Furthermore, the pipetting valve is a needle valve or an injection valve.

[0020] Furthermore, it further includes a base for placing the U-shaped tube.

[0021] The present utility model provides a pipetting device for a pipette. The liquid inlet end of the U-shaped tube is communicated with the atmosphere, and the connection end of the pipette is connected to the pipette. By using the principle of the communicating vessel of the U-shaped tube, when sucking liquid, the liquid at the connection end of the pipette can rise to the same height as the liquid level at the liquid inlet end. Since the vertical distance between the plane where the atmosphere communication end is located and the plane where the pipetting valve is located ≥ the distance between the pipette orifice and the pipette scale line, the liquid at the connection end of the pipette enters the pipette and rises to the same height as the liquid level at the liquid inlet end, realizing liquid pipetting. In order to ensure that the liquid at the connection end of the pipette does not overflow, the opening and closing of the connection end of the pipette are controlled by setting a pipetting valve. When the pipetting valve is connected to the pipette, it is in an open state, enabling the liquid to enter the pipette. When the pipetting valve is separated from the pipette, the pipetting valve is closed, preventing the liquid in the U-shaped tube from overflowing. After continuous liquid addition, continuous pipetting operations can be performed. Multiple pipetting valves can be used simultaneously according to specific needs, solving the technical problem of low efficiency in repeated pipetting of large-range single-scale pipettes in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1Schematic front view structure diagram of a pipetting device for a pipette provided in Embodiment 1 of the present utility model;

[0024] Figure 2 Schematic top view structure diagram of a pipetting device for a pipette provided in Embodiment 1 of the present utility model;

[0025] Figure 3 For Figure 2 Schematic cross-sectional structure diagram in the A-A direction in

[0026] Figure 4 Schematic three-dimensional structure diagram of a pipetting device for a pipette provided in Embodiment 2 of the present utility model;

[0027] Figure 5 For Figure 4 Schematic enlarged structure diagram at A in

[0028] Figure 6 Schematic three-dimensional structure diagram of a pipetting device for a pipette provided in Embodiment 3 of the present utility model.

[0029] Reference numerals: 10 - U-shaped tube; 11 - Liquid inlet end; 12 - Pipette connection end; 13 - Pipetting valve; 14 - Connecting card board; 15 - Fixed card board; 16 - Card slot; 17 - End cap; 18 - Liquid inlet; 19 - Communication port; 20 - Liquid outlet; 21 - Base; 22 - Operation port; 23 - Blocking structure. Detailed implementation manners

[0030] Unless otherwise defined herein, scientific and technical terms used in conjunction with the present utility model shall have the meanings commonly understood by those of ordinary skill in the art. The meanings and scopes of the terms should be clear. However, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or extrinsic definition. In this application, unless otherwise stated, the use of "or" means "and / or". In addition, the use of the term "including" and other forms is non-restrictive.

[0031] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "proximal end", "distal end", "front end", "rear end", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0033] Terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] The present utility model provides a pipetting device for a pipette, which includes a U-shaped tube 10. The U-shaped tube 10 includes a liquid inlet end 11 communicating with the atmosphere and a pipette connection end 12 for connecting the pipette.

[0036] The pipette connection end 12 is provided with a plurality of pipetting valves 13 for controlling the opening and closing of the pipette connection end 12.

[0037] The perpendicular distance between the plane where the atmosphere communication end 11 is located and the plane where the pipetting valve 13 is located is ≥ the distance between the pipette nozzle and the pipette scale mark.

[0038] The liquid inlet end 11 of the U-shaped tube 10 is in communication with the atmosphere, and the pipette connection end 12 is connected to the pipette; by using the principle of communicating vessels of the U-shaped tube, the liquid at the pipette connection end 12 can rise to the same height as the liquid level at the liquid inlet end 11 during liquid suction. Since the vertical distance between the plane where the atmosphere connection end 11 is located and the plane where the pipetting valve 13 is located is ≥ the distance between the pipette nozzle and the pipette scale line, the liquid at the pipette connection end 12 enters the pipette and rises to the same height as the liquid level at the liquid inlet end 11, realizing liquid pipetting. In order to ensure that the liquid at the pipette connection end 12 does not overflow, the opening and closing of the pipette connection end 12 are controlled by setting the pipetting valve 13. When the pipetting valve 13 is connected to the pipette, it is in an open state, allowing the liquid to enter the pipette. When the pipetting valve 13 is separated from the pipette, the pipetting valve 13 is in a closed state, preventing the liquid in the U-shaped tube 10 from overflowing. After continuous liquid addition, continuous pipetting operations can be performed. Multiple pipetting valves 13 can be used simultaneously according to specific needs, solving the technical problem of low efficiency of large-range single-scale pipettes in repeated pipetting in the prior art.

[0039] In some specific embodiments, the pipette connection end 12 is provided with a connection clamping plate 14, and a plurality of the pipetting valves 13 are arranged on the connection clamping plate 14.

[0040] In some specific embodiments, the outer diameter of the connection clamping plate 14 matches the inner diameter of the pipette connection end 12. This ensures a tight fit between the connection clamping plate 14 and the pipette connection end 12.

[0041] In some specific embodiments, the pipette connection end 12 is further provided with a fixed clamping plate 15 located above the connection clamping plate 14;

[0042] The pipette connection end 12 is provided with an operation port 22, and it is located above the connection clamping plate 14 and corresponds to the fixed clamping plate 15;

[0043] On the side of the fixed clamping plate 15 opposite to the operation port 22, a plurality of card slots 16 corresponding to the pipetting valves 13 are provided. The inner diameter of the card slots 16 matches the outer diameter of the non-bulged part of the pipette, and the notch of the card slot 16 is arranged opposite to the operation port 22.

[0044] During use, the notch of the card slot 16 is arranged opposite to the operation port 22. The suction end of the pipette can be inserted through the operation port 22 and connected to the corresponding pipetting valve 13 in the card slot 16 for pipetting operations. Multiple pipettes can be connected and used simultaneously, and the pipette is kept stable during pipetting through the card slot 16.

[0045] In some specific embodiments, at the notch of the card slot 16, oppositely arranged blocking structures 23 are provided, and the distance between the oppositely arranged blocking structures is < the outer wall diameter of the non-bulged part of the pipette.

[0046] The upper and lower ends of the card slot 16 are connected, and the blocking structure 23 faces the operator. The distance between the opposite sides of the two blocking structures 23 is slightly smaller than the outer diameter of the pipette, facilitating the pipette to enter the card slot 16 through slight extrusion. Specifically, the blocking structure 23 can be made of a resilient material such as silica gel or rubber.

[0047] For ease of use, the position of the fixed clamping plate 15 can be adjusted along the inner wall of the connection end 12 of the pipette to accommodate pipettes of different capacities. Specifically, a groove can be provided along the inner wall of the connection end 12 of the pipette, and the edge of the fixed clamping plate 15 matches the groove for easy movement. It has been found in applications that when pipetting volatile, highly corrosive, or pungent-smelling liquids, since the liquid inlet end 11 is in communication with the atmosphere, there is a risk of accidental liquid spillage or a large amount of volatilization and diffusion.

[0048] In some specific embodiments, the liquid inlet end 11 is provided with an end cap 17, and the end cap 17 is provided with a liquid inlet 18 and a communication port 19.

[0049] The end cap 17 blocks accidental liquid spillage or reduces the volatilization and diffusion rate. Liquid can be injected through the liquid inlet 18 provided on the end cap 17, and the liquid inlet end 11 is always kept in communication with the atmosphere through the communication port 19.

[0050] In some specific embodiments, the bottom of the U-shaped tube 10 is provided with a liquid outlet 20.

[0051] The liquid outlet 20 facilitates the removal of the liquid after pipetting is completed.

[0052] In some specific embodiments, valves are respectively provided at the liquid inlet 18 and the liquid outlet 20.

[0053] By providing valves, it is convenient to respectively control the opening and closing states of the liquid inlet 18 and the liquid outlet 20.

[0054] In some specific embodiments, the pipetting valve 13 is a needle valve or an injection valve.

[0055] After the pipette is pulled out after liquid suction, the needle valve or injection valve can ensure that the liquid does not overflow from the valve port pores, thereby achieving the effect of sealing the liquid, and continuous operation can be carried out after continuous liquid addition.

[0056] In some specific embodiments, it further includes a base 21 for placing the U-shaped tube 10.

[0057] By providing the base 21, the U-shaped tube 10 is stably placed, avoiding movement or tilting during use, which affects the pipetting efficiency and accuracy.

[0058] The technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0059] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0060] Embodiment 1

[0061] In combination with Figures 1 to 3 and Figure 5 for illustration, a pipetting device for a pipette includes a U-shaped tube 10. The U-shaped tube 10 includes a liquid inlet end 11 communicating with the atmosphere and a pipette connection end 12 for connecting the pipette.

[0062] The pipette connection end 12 is provided with a connection clamping plate 14. Three pipetting valves 13 are arranged on the connection clamping plate 14 to control the opening and closing of the pipette connection end 12; the outer diameter of the connection clamping plate 14 matches the inner diameter of the pipette connection end 12. Above the connection clamping plate 14, there is a fixed clamping plate 15. The pipette connection end 12 is provided with an operation port 22, and it is located above the connection clamping plate 14 corresponding to the fixed clamping plate 15; on the side of the fixed clamping plate 15 opposite to the operation port 22, there are a number of card slots 16 corresponding to the pipetting valves 13. The upper and lower ends of the card slots 16 are communicated. The inner diameter of the card slots 16 matches the outer diameter of the non-bulb part of the pipette. The notch of the card slots 16 is arranged opposite to the operation port 22. At the notch of the card slots 16, there are oppositely arranged blocking structures 23, and the distance between the oppositely arranged blocking structures is slightly smaller than the outer wall diameter of the non-bulb part of the pipette.

[0063] The vertical distance between the plane where the atmosphere connection end 11 is located and the plane where the pipetting valve 13 is located ≥ the distance between the pipette nozzle and the pipette scale line.

[0064] Among them, the pipetting valve 13 is a needle valve.

[0065] Embodiment 2

[0066] In combination with Figure 4 for illustration, different from Embodiment 1, the liquid inlet end 11 is provided with an end cap 17, and the end cap 17 is provided with a liquid inlet 18 and a communication port 19. The bottom of the U-shaped tube 10 is provided with a liquid outlet 20.

[0067] Valves are respectively provided at the liquid inlet 18 and the liquid outlet 20.

[0068] Embodiment 3

[0069] Combined Figure 6 For illustration, different from Embodiment 2, it further includes a base 21 for placing the U-shaped tube 10.

[0070] It should be noted that in this embodiment, the base 21 has a structure with a groove matching the U-shaped tube 10 to achieve the support and fixation effect. In actual use, at least 1 bracket matching the U-shaped tube 10 can also be used for support.

[0071] Among them, in addition to the circular cross-section shown in the embodiment, the U-shaped tube 10 can also be set to various other shapes convenient for use, including but not limited to rectangle, trapezoid, rhombus or polygon, and can be set according to specific needs.

[0072] Working principle:

[0073] During use, place the U-shaped tube 10 on the base 21. The pipette passes through the operation port 22 and the blocking structure 23 into the card slot 16, so that the suction end of the pipette moves downward and inserts into the corresponding needle valve. Inject the liquid to be measured from the liquid inlet 18, so that the liquid enters the pipette and rises to the same height as the liquid level at the liquid inlet end 11 with the increase of the injected liquid volume, that is, until it reaches the measuring scale. Separate the pipette from the needle valve to complete the liquid transfer. Multiple pipettes can be inserted simultaneously for the liquid transfer step. After the liquid transfer is completed, the pipette can be inserted again to repeat the above operation.

[0074] According to different application situations, part of the liquid to be measured can also be injected through the liquid inlet 18 first, and then the pipette passes through the operation port 22 and the blocking structure 23 into the card slot 16, so that the suction end of the pipette moves downward and inserts into the corresponding needle valve. After insertion, continue to inject the liquid to be measured and adjust the liquid level height until it reaches the measuring scale to complete the liquid transfer.

[0075] Finally, it should be noted that: 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipetting device for a pipette, characterized in that: The U-shaped tube (10) comprises a liquid inlet end (11) connected to the atmosphere and a pipette connecting end (12) for connecting to a pipette; The pipette connection end (12) is provided with a plurality of pipetting valves (13) for controlling the opening and closing of the pipette connection end (12); The vertical distance between the plane where the liquid inlet end (11) is located and the plane where the pipette valve (13) is located is greater than or equal to the distance between the pipette orifice and the pipette marking line.

2. The liquid transfer device according to claim 1, characterized in that: The pipette connection end (12) is provided with a connection card plate (14), and a plurality of the liquid transfer valves (13) are arranged on the connection card plate (14).

3. The liquid transfer device according to claim 2, characterized in that: The outer diameter of the connecting clamp plate (14) matches the inner diameter of the pipette connecting end (12).

4. The liquid transfer device according to claim 3, characterized in that: The pipette connection end (12) is also provided with a fixed clamping plate (15) located above the connection clamping plate (14); The pipette connection end (12) is provided with an operation port (22) and is located above the connection card plate (14) and at a position corresponding to the fixed card plate (15); A plurality of slots (16) corresponding to the pipetting valve (13) are provided on a side of the fixed clamping plate (15) opposite to the operating port (22); the inner diameter of the slot (16) matches the outer diameter of the non-bulgy portion of the pipette; and the notch of the slot (16) is arranged opposite to the operating port (22).

5. The liquid transfer device according to claim 4, characterized in that: The notch of the clamping slot (16) is provided with a blocking structure (23) disposed opposite to each other, and the distance between the blocking structures disposed opposite to each other is less than the diameter of the outer wall of the pipette at the non-bulging part.

6. The liquid transfer device according to any one of claims 1 to 5, characterized in that: The liquid inlet end (11) is provided with an end cover (17), and the end cover (17) is provided with a liquid inlet (18) and a communication port (19).

7. The liquid transfer device according to claim 6, characterized in that: The bottom of the U-shaped tube (10) is provided with a liquid outlet (20).

8. The liquid transfer device according to claim 7, characterized in that: Valves are respectively provided at the liquid inlet (18) and the liquid outlet (20).

9. The liquid transfer device according to claim 8, characterized in that: The transfer valve (13) is a needle valve or an injection valve.

10. The liquid transfer device according to claim 9, characterized in that: It also comprises a base (21) for placing the U-shaped tube (10).

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