A visual liquid suction device

Abstract

The utility model provides a visual liquid sucking device, visual liquid sucking device includes flexible micro negative pressure generating assembly, micro negative pressure generating assembly includes flexible air bag, the flexible air bag includes gas export, gas export connects gas discharge pipe, gas export and / or gas discharge pipe inside is provided with breathable liquid -resisting membrane, gas discharge pipe one end detachably connects transparent liquid sucking cavity. Visual liquid sucking device can improve the accuracy of pipetting volume, avoid the problem that liquid enters the inside of air bag simultaneously, avoid the pollution to subsequent liquid sucking operation.

Description

Technical Field

[0001] This utility model belongs to the field of pipetting devices and relates to a visual liquid aspiration device. Background Technology

[0002] A syringe, commonly used in chemical and medical experiments, is a tool for precise pipetting and liquid transfer. Traditional syringes are typically made of rubber or silicone and are operated by manually squeezing to create negative pressure to draw in or expel liquid. Visual syringes, however, build upon the traditional design by adding a transparent tube or graduated markings, facilitating observation of liquid volume and flow patterns, thus improving the accuracy and controllability of the operation.

[0003] The advantages of syringe rubber bulbs lie in their ease of use, low cost, and lack of electrical power, making them suitable for small-scale experiments or temporary liquid transfers. Visual syringe rubber bulbs further optimize experimental procedures, reducing the risk of misuse through their transparent design, making them particularly suitable for scenarios requiring precise control of liquid volumes, such as medical testing or the addition of trace chemical reagents. Furthermore, syringe rubber bulbs are generally easy to clean and sterilize, reusable, and meet laboratory hygiene requirements.

[0004] However, syringe bulbs also have some drawbacks. Traditional models, due to their opacity, may lead to misjudgments of liquid volume. While visible syringe bulbs improve this issue, prolonged use may result in blurred graduations or yellowing of the tube walls due to material aging, and the visible section is not replaceable. Furthermore, manual operation relies on user skill; if liquid is drawn into the syringe bulb, it can easily cause cross-contamination in experiments, and there are certain risks when pumping corrosive or highly viscous liquids. Overall, syringe bulbs are practical and economical tools in the laboratory, but their suitability should be weighed according to experimental needs. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a visual liquid aspiration device, which can improve the accuracy of liquid transfer volume and avoid the problem of liquid entering the air bladder, thus preventing contamination of subsequent liquid aspiration operations.

[0006] To achieve the above-mentioned technical effects, the present invention adopts the following technical solution:

[0007] This utility model provides a visual liquid aspiration device, which includes a flexible micro-negative pressure generating component, a flexible airbag, a gas outlet, a gas discharge tube, and a breathable liquid-resistant membrane inside the gas outlet and / or the gas discharge tube. One end of the gas discharge tube is detachably connected to a transparent liquid aspiration chamber.

[0008] As a preferred technical solution of this utility model, the flexible airbag is a flexible spherical airbag.

[0009] As a preferred technical solution of this utility model, the flexible airbag is a flexible spherical rubber airbag.

[0010] As a preferred technical solution of this utility model, the gas discharge pipe is integrally connected to the flexible airbag.

[0011] As a preferred technical solution of this utility model, the diameter of the gas discharge pipe decreases uniformly along the gas discharge direction.

[0012] As a preferred technical solution of this utility model, the air-permeable liquid-blocking membrane is a hydrophobic microporous membrane and / or a dense polymer membrane.

[0013] As a preferred technical solution of this utility model, the hydrophobic microporous membrane includes any one or a combination of at least two of expanded polytetrafluoroethylene membrane, polypropylene membrane, water treatment ceramic membrane or water treatment metal membrane.

[0014] Preferably, the pore size of the hydrophobic microporous membrane is 0.05 to 0.2 μm.

[0015] As a preferred technical solution of this utility model, the dense polymer film includes a silicone rubber film or a polytetrafluoroethylene homogeneous film.

[0016] As a preferred technical solution of this utility model, the transparent liquid absorption cavity is provided with volume scale.

[0017] As a preferred technical solution of this utility model, the transparent liquid absorption cavity is a transparent plastic conical tube and / or a transparent glass conical tube.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] This invention provides a visual liquid aspiration device, which can improve the accuracy of liquid transfer volume and avoid the problem of liquid entering the air bladder, thus preventing contamination of subsequent liquid aspiration operations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the visual liquid aspiration device provided in Embodiment 1 of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the visual liquid aspiration device provided in Embodiment 2 of this utility model.

[0022] In the diagram: 1- Flexible airbag, 2- Gas discharge tube, 3- Transparent liquid absorption chamber, 4- Air-permeable liquid-resistant membrane.

[0023] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the claims. Detailed Implementation

[0024] The technical solution of this application will be further described below through specific implementation methods.

[0025] This utility model provides a visual liquid aspiration device, which includes a flexible micro-negative pressure generating component, a flexible airbag, a gas outlet, a gas discharge tube, and a breathable liquid-resistant membrane inside the gas outlet and / or the gas discharge tube. One end of the gas discharge tube is detachably connected to a transparent liquid aspiration chamber.

[0026] In this invention, by providing a transparent liquid suction chamber at the outlet end of the gas discharge tube, the visual control of liquid suction can be achieved. This also effectively extends the length of the gas discharge tube, preventing excessive liquid intake and subsequent liquid inhalation into the airbag. Furthermore, a breathable liquid-resistant membrane is provided at the gas outlet and / or inside the gas discharge tube, allowing gas to pass through while preventing liquid from passing through, further preventing corrosion or contamination inside the airbag caused by liquid inhalation.

[0027] In one specific embodiment of this invention, the flexible airbag is a flexible spherical airbag. Although the shape of the airbag can be any three-dimensional shape, polyhedral or bag-shaped airbags are not conducive to volume compression and control, therefore a spherical airbag is preferred.

[0028] In one specific embodiment of this invention, the flexible airbag is a flexible spherical rubber airbag. However, it is not limited to rubber airbags; airbags made of other flexible materials with recoverable properties are also suitable for this device.

[0029] In one specific embodiment of this invention, the gas discharge pipe and the flexible airbag are integrally connected. That is, the gas discharge pipe and the flexible airbag are integrally manufactured through methods such as mold casting.

[0030] In one specific embodiment of this utility model, the gas discharge pipe and the flexible airbag can also be set separately, that is, the gas discharge pipe and the flexible airbag are connected by means such as threaded connection to ensure airtightness, and at the same time, the gas discharge pipe can be easily disassembled for cleaning when liquid enters the gas discharge pipe.

[0031] In one specific embodiment of this invention, the diameter of the gas discharge pipe decreases uniformly along the gas discharge direction. The diameter at the outlet of the gas discharge pipe is smaller than the diameter at the connection between the gas discharge pipe and the gas outlet of the airbag. Preferably, the gas discharge pipe is a conical pipe.

[0032] In one specific embodiment of this utility model, the volume of the flexible airbag and the length of the gas discharge pipe can be adjusted according to product needs, and no further limitations are made here.

[0033] In one specific embodiment of this utility model, the integrated flexible airbag and gas discharge pipeline can be a bulb syringe.

[0034] In one specific embodiment of this invention, the gas-permeable and liquid-blocking membrane is a hydrophobic microporous membrane and / or a dense polymer membrane. The gas-permeable and liquid-blocking membrane allows gas to permeate and create a pressure difference, but liquids, such as water, cannot permeate the membrane, thus preventing liquid from entering the airbag.

[0035] In one specific embodiment of this utility model, the hydrophobic microporous membrane includes any one or a combination of at least two of expanded polytetrafluoroethylene membrane, polypropylene membrane, water treatment ceramic membrane, or water treatment metal membrane.

[0036] In one specific embodiment of this utility model, the pore size of the hydrophobic microporous membrane is 0.05 to 0.2 μm, such as 0.05 μm, 0.08 μm, 0.1 μm, 0.12 μm, 0.15 μm, 0.18 μm or 0.2 μm, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0037] In one specific embodiment of this utility model, the thickness of the hydrophobic microporous membrane can be 5 to 250 μm, such as 5 μm, 10 μm, 25 μm, 50 μm, 100 μm, 150 μm or 200 μm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0038] In one specific embodiment of this utility model, the dense polymer film includes a silicone rubber film or a polytetrafluoroethylene homogeneous film.

[0039] In one specific embodiment of this utility model, the thickness of the dense polymer film can be 10 to 200 μm, such as 10 μm, 20 μm, 50 μm, 80 μm, 100 μm, 120 μm, 150 μm, 180 μm or 200 μm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0040] In one specific embodiment of this utility model, the gas-permeable and liquid-resistant membrane can be fixedly connected to the gas outlet and / or gas discharge tube of the airbag by means of adhesive bonding.

[0041] In one specific embodiment of this invention, at least one layer of breathable and liquid-resistant membrane is provided at the gas outlet of the airbag. The gas discharge tube may not have a breathable and liquid-resistant membrane, or it may have 1 to 5 layers of breathable and liquid-resistant membrane. The number of layers can be adjusted according to the length of the gas discharge tube and is not limited to the above-mentioned number.

[0042] In one specific embodiment of this utility model, the transparent suction cavity is provided with a volume scale. The volume scale can be adjusted according to the volume of the transparent suction cavity, and is not further limited herein.

[0043] In one specific embodiment of this utility model, the transparent liquid absorption cavity is a transparent plastic conical tube and / or a transparent glass conical tube.

[0044] In one specific embodiment of this utility model, the transparent liquid suction cavity can be detachably connected to one end of the gas discharge tube by means of a threaded connection. Since the gas discharge tube can also be a conical tube, the inner diameter of the non-liquid outlet end of the transparent liquid suction cavity can be set to be smaller than the outer diameter of a certain section of the gas discharge tube (such as the middle section of the gas discharge tube). When the transparent liquid suction cavity is sleeved on the gas discharge tube, it can be snapped onto the gas discharge tube to form an airtight detachable connection.

[0045] In one specific embodiment of this utility model, the transparent aspiration cavity can be a pipette tip with volume graduations.

[0046] In one specific embodiment of this utility model, a method for using the visual liquid aspiration device provided by this utility model is provided. The method includes: assembling a transparent liquid aspiration chamber at the outlet end of a gas discharge tube; squeezing a flexible airbag to expel some gas from the flexible airbag, creating a pressure difference with atmospheric pressure; immersing the liquid aspiration port of the transparent liquid aspiration chamber below the liquid surface; and removing the squeezing force on the flexible airbag. Under the action of the pressure difference, the liquid is forced from the atmosphere into the transparent liquid aspiration chamber. If the volume of liquid aspirated is greater than the target volume, an appropriate amount of liquid can be squeezed out after the transparent liquid aspiration chamber leaves the liquid; if the volume of liquid aspirated is less than the target volume, the pressure applied to the flexible airbag can be appropriately increased to increase the amount of liquid aspirated.

[0047] To better illustrate this utility model and facilitate understanding of its technical solution, typical but non-limiting embodiments of this utility model are as follows:

[0048] Example 1

[0049] This embodiment provides a visual liquid aspiration device, the structure of which is as follows: Figure 1As shown, the visual liquid aspiration device includes a flexible micro-negative pressure generating component, which includes a flexible airbag 1. The flexible airbag 1 includes a gas outlet, which is connected to a gas discharge pipe 2. The gas outlet of the flexible airbag 1 is provided with a breathable liquid-resistant membrane 4. One end of the gas discharge pipe 2 is detachably connected to a transparent liquid aspiration chamber 3.

[0050] The flexible airbag 1 is a flexible spherical rubber airbag. The flexible airbag 1 and the connecting gas exhaust pipe 2 are integrated. The material of the connecting gas exhaust pipe 2 is the same as that of the flexible airbag 1.

[0051] The transparent aspiration chamber 3 is a transparent plastic conical tube with a maximum graduation of 2 mL. The graduations are evenly distributed, with each graduation representing 0.1 mL.

[0052] The gas-permeable and liquid-resistant membrane 4 is a polypropylene membrane with a pore size of 0.1–0.2 μm and a thickness of 100 μm.

[0053] Example 2

[0054] This embodiment provides a visual liquid aspiration device, the structure of which is as follows: Figure 2 As shown, the visual liquid aspiration device includes a flexible micro-negative pressure generating component, which includes a flexible airbag 1. The flexible airbag 1 includes a gas outlet, which is connected to a gas discharge pipe 2. The gas outlet of the flexible airbag 1 and the gas discharge pipe 2 are respectively provided with a breathable liquid-resistant membrane 4. One end of the gas discharge pipe 2 is detachably connected to a transparent liquid aspiration chamber 3.

[0055] The flexible airbag 1 is a flexible spherical rubber airbag. The flexible airbag 1 and the connecting gas exhaust pipe 2 are integrated. The material of the connecting gas exhaust pipe 2 is the same as that of the flexible airbag 1.

[0056] The transparent aspiration chamber 3 is a transparent plastic conical tube with a maximum graduation of 2 mL. The graduations are evenly distributed, with each graduation representing 0.1 mL.

[0057] The gas-permeable and liquid-resistant membrane 4 is a polypropylene membrane with a pore size of 0.1–0.2 μm and a thickness of 100 μm.

[0058] Example 3

[0059] In this embodiment, except that the transparent aspiration chamber 3 is a transparent plastic conical tube with a maximum scale of 5 mL and uniformly set scales, each scale representing 0.2 mL, all other conditions are the same as in Example 1.

[0060] Experiments using the visual liquid aspiration devices provided in Examples 1-3 to aspirate sodium chloride aqueous solution showed that these devices can accurately aspirate the required volume of sodium chloride aqueous solution. Furthermore, when excess sodium chloride aqueous solution was aspirated, opening the flexible airbag revealed that no liquid entered; the liquid remained only inside the gas exhaust tube, which could be removed through cleaning and drying, without contaminating subsequent experiments.

[0061] The applicant declares that the detailed structural features of this utility model are illustrated through the above embodiments, but this utility model is not limited to the above detailed structural features, that is, it does not mean that this utility model must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions of selected components, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this utility model.

[0062] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0064] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A visual liquid aspiration device, characterized in that, The visual liquid aspiration device includes a flexible micro-negative pressure generating component, which includes a flexible airbag. The flexible airbag includes a gas outlet, which is connected to a gas discharge pipe. The gas outlet and / or the gas discharge pipe are provided with a breathable liquid-resistant membrane inside. One end of the gas discharge pipe is detachably connected to a transparent liquid aspiration chamber.

2. The visual liquid aspiration device according to claim 1, characterized in that, The flexible airbag is a flexible spherical airbag.

3. The visual liquid aspiration device according to claim 1, characterized in that, The flexible airbag is a flexible spherical rubber airbag.

4. The visual liquid aspiration device according to claim 1, characterized in that, The gas discharge pipe is integrally connected to the flexible airbag.

5. The visual liquid aspiration device according to claim 1, characterized in that, The diameter of the gas discharge pipe decreases uniformly along the gas discharge direction.

6. The visual liquid aspiration device according to claim 1, characterized in that, The breathable liquid-resistant membrane is a hydrophobic microporous membrane and / or a dense polymer membrane.

7. The visual liquid aspiration device according to claim 6, characterized in that, The hydrophobic microporous membrane includes any one or a combination of at least two of expanded polytetrafluoroethylene membrane, polypropylene membrane, water treatment ceramic membrane or water treatment metal membrane. The hydrophobic microporous membrane has a pore size of 0.05~0.2μm.

8. The visual liquid aspiration device according to claim 6, characterized in that, The dense polymer film includes a silicone rubber film or a polytetrafluoroethylene homogeneous film.

9. The visual liquid aspiration device according to claim 1, characterized in that, The transparent liquid absorption cavity is equipped with volume graduations.

10. The visual liquid aspiration device according to claim 1, characterized in that, The transparent aspiration chamber is a transparent plastic conical tube and / or a transparent glass conical tube.

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