Pipetting device for collecting, uniformly mixing and separating solution

Abstract

The utility model relates to a pipetting device for solution collection, uniform mixing and separation, which comprises a Y-shaped three-way pipe, a bottom opening of the Y-shaped three-way pipe is communicated with a first sampling pipe, and two openings at the top of the Y-shaped three-way pipe are respectively communicated with a first three-way valve and a second three-way valve. The other two openings of the first three-way valve are respectively communicated with a first sampling tube and a second sampling tube, and the other two openings of the second three-way valve are respectively communicated with a second sampling tube and a third sampling tube. Needles are arranged at the bottoms of the first sampling tube, the second sampling tube and the third sampling tube, a uniform mixing sample bottle and a separate sampling bottle for experiments can adopt headspace bottles, a sample solution is not easy to pollute, and when the sample solution is transferred for multiple times, the internal communication state is controlled through a first three-way valve and a second three-way valve, so that the sample solution is not prone to being polluted. A plurality of holes are not formed in the uniformly-mixing sample bottle and the separately-taking sample bottle, so that the sample solution is further prevented from being polluted, and meanwhile, the subsequent storage of the sample solution is also facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of solution pre-sampling treatment, in particular to a liquid transfer device used for solution collection, mixing and separation. Background Art

[0002] Solution collection and mixing is to transfer the sample solutions from multiple sample bottles to a mixing sample bottle for mixing; solution collection and collection is to transfer the mixed sample solutions from the mixing sample bottle to multiple sample bottles after aspirating. The simple and rapid quantitative pre-treatment operations for solution collection, mixing and collection are not only an important technical support for laboratories to observe the reaction changes of different solutions, but also provide an important technical guarantee for the simultaneous collection of different volumes of water sample solutions and their rapid storage in closed containers during field experiments.

[0003] There are two conventional methods for solution collection, mixing and fractionation. One is to use a pipette to draw and move the sample solution. In this method, only open sample bottles can be used for mixing and fractionation bottles, and the sample solution is easily contaminated. The other is to use a syringe to draw and move the sample solution. In this method, closed sample bottles (headspace bottles) can be used for mixing and fractionation bottles. However, since there are multiple transfer processes in solution collection, mixing and fractionation experiments, each transfer syringe needs to be reinserted into the mixing and fractionation bottles, which will produce multiple holes on the mixing and fractionation bottles, which is not only easy to contaminate the sample solution, but also not conducive to the subsequent storage of the sample solution. Utility Model Content

[0004] The main purpose of the utility model is to provide a liquid transfer device for collecting, mixing and dispensing solutions, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A pipetting device for solution collection, mixing and fractionation comprises a Y-shaped three-way tube, wherein the bottom opening of the Y-shaped three-way tube is connected to a first sampling tube, the two top openings of the Y-shaped three-way tube are respectively connected to a first three-way valve and a second three-way valve, the other two openings of the first three-way valve are respectively connected to a first sampling tube and a second sampling tube, the other two openings of the second three-way valve are respectively connected to a second sampling tube and a third sampling tube, the first sampling tube and the second sampling tube are both provided with piston push rods, and the bottoms of the first sampling tube, the second sampling tube and the third sampling tube are all provided with needles.

[0007] Preferably, the first sampling cylinder and the second sampling cylinder are provided with scale lines.

[0008] Preferably, the first sampling tube, the second sampling tube and the third sampling tube are each provided with a control switch.

[0009] Preferably, the first three-way valve, the second three-way valve and the Y-shaped three-way pipe are connected via a hose.

[0010] Preferably, the Y-shaped three-way pipe is a hard PVC pipe with an outer diameter of 8 mm, an inner diameter of 6 mm, and a total length of 6 cm.

[0011] Preferably, the first sampling tube, the second sampling tube and the third sampling tube are hard PE tubes with an outer diameter of 9 mm, an inner diameter of 8.5 mm and a length of 10 cm.

[0012] Preferably, the first sampling cylinder and the second sampling cylinder have a length of 12 cm and an inner diameter of 2 cm, and the length of the piston push rod is 15 cm.

[0013] The utility model provides a liquid transfer device for collecting, mixing and dispensing solutions, which has the following beneficial effects:

[0014] 1. In the solution collection, mixing and fractionation experiment of the utility model, the first sampling cylinder and the second sampling cylinder can be operated synchronously to absorb or inject the sample solution, and the solution collection, mixing and fractionation efficiency is high.

[0015] 2. The bottoms of the first sampling tube, the second sampling tube and the third sampling tube are all provided with needles, so the mixing sample bottles and the sample bottles used in the experiment can both adopt headspace bottles, and the sample solutions are not easily contaminated.

[0016] 3. When the sample solution is transferred multiple times, the internal connectivity is controlled by the first three-way valve and the second three-way valve, the needle of the first sampling tube is always inserted in the mixing sample bottle, and the needles of the second sampling tube and the third sampling tube are always inserted in the sample bottle. Multiple holes will not be generated in the mixing sample bottle and the sample bottle, which further prevents the contamination of the sample solution and is also beneficial to the subsequent preservation of the sample solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the liquid transfer device of the utility model.

[0018] In the figure: 1. Y-type three-way pipe; 2. first sampling tube; 3. first three-way valve; 4. second three-way valve; 5. first sampling cylinder; 6. second sampling tube; 7. second sampling cylinder; 8. third sampling tube; 9. piston push rod; 10. needle; 11. scale line; 12. control switch; 13. hose; 100. mixing sample bottle; 200. sample bottle. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings of the utility model.

[0020] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Examples, such as Figure 1As shown, a pipetting device for solution collection, mixing and fractionation comprises a Y-shaped three-way tube 1, the bottom opening of the Y-shaped three-way tube 1 is connected to a first sampling tube 2, the two top openings of the Y-shaped three-way tube 1 are respectively connected to a first three-way valve 3 and a second three-way valve 4, the other two openings of the first three-way valve 3 are respectively connected to a first sampling cylinder 5 and a second sampling tube 6, the other two openings of the second three-way valve 4 are respectively connected to a second sampling cylinder 7 and a third sampling tube 8, the first sampling cylinder 5 and the second sampling cylinder 7 are each provided with a piston push rod 9, and the bottoms of the first sampling tube 2, the second sampling tube 6 and the third sampling tube 8 are each provided with a needle 10.

[0024] The device is used for solution collection, mixing and separation experiments. All joints of the device are sealed to prevent liquid and gas leakage. The mixing sample bottle 100 and the separation sample bottle 200 used in the experiment are both headspace bottles.

[0025] When performing a solution collection and mixing experiment, the sample solution for mixing is contained in the sample bottle 200, the needle 10 of the first sampling tube 2 is inserted into the mixing sample bottle 100, and the needles 10 of the second sampling tube 6 and the third sampling tube 8 are inserted into the sample bottle 200 respectively, and the first three-way valve 3 and the second three-way valve 4 are adjusted to make the first sampling cylinder 5 and the second sampling tube 6 and the second sampling cylinder 7 and the third sampling tube 8 connected, while the first sampling cylinder 5 and the first sampling tube 2 and the second sampling cylinder 7 and the first sampling tube 2 are not connected, and the first sampling cylinder 5 and the second sampling cylinder 7 are pulled outward. 7, the sample solutions in the two sample bottles 200 will be sucked into the first sampling tube 5 and the second sampling tube 7 respectively, and then the first three-way valve 3 and the second three-way valve 4 are adjusted to make the first sampling tube 5 and the second sampling tube 6 and the second sampling tube 7 and the third sampling tube 8 disconnected, while the first sampling tube 5 and the first sampling tube 2 and the second sampling tube 7 and the first sampling tube 2 are connected, and the piston push rods 9 of the first sampling tube 5 and the second sampling tube 7 are pushed inward, and the sample solutions in the first sampling tube 5 and the second sampling tube 7 are injected into the mixing sample bottle 100 for mixing.

[0026] According to the different volumes of solution absorbed by the first sampling cylinder 5 and the second sampling cylinder 7, mixed sample solutions of different concentrations can be prepared. When adding and mixing multiple times to transfer the sample solution in the solution collection and mixing experiment, the above method can be used for multiple operations.

[0027] When performing a solution separation experiment, the mixed sample bottle 100 is filled with a sample solution that has been mixed. The needle 10 of the first sampling tube 2 is inserted into the mixed sample bottle 100, and the needles 10 of the second sampling tube 6 and the third sampling tube 8 are inserted into the sample separation bottle 200 respectively. The first three-way valve 3 and the second three-way valve 4 are adjusted to make the first sampling cylinder 5 and the first sampling tube 2 and the second sampling cylinder 7 and the first sampling tube 2 connected, while the first sampling cylinder 5 and the second sampling tube 6 and the second sampling cylinder 7 and the third sampling tube 8 are not connected. The first sampling cylinder 5 and the second sampling tube 6 are pulled outward to open. The piston push rod 9 of the sampling cylinder 7, the sample solution in the mixed sample bottle 100 will be sucked into the first sampling cylinder 5 and the second sampling cylinder 7 respectively, and then the first three-way valve 3 and the second three-way valve 4 are adjusted to make the first sampling cylinder 5 and the second sampling tube 6 and the second sampling cylinder 7 and the third sampling tube 8 connected, while the first sampling cylinder 5 and the first sampling tube 2 and the second sampling cylinder 7 and the first sampling tube 2 are not connected, and the piston push rods 9 of the first sampling cylinder 5 and the second sampling cylinder 7 are pushed inward, and the sample solutions in the first sampling cylinder 5 and the second sampling cylinder 7 are respectively injected into the sub-sample bottle 200.

[0028] Similarly, according to the different volumes of solution absorbed by the first sampling cylinder 5 and the second sampling cylinder 7, different volumes of sample solutions can be dispensed and loaded into the sample dispensing bottle 200. When the sample solutions are transferred multiple times during the solution dispensing experiment, the above method can be used for multiple operations.

[0029] In the solution collection, mixing and fractionation experiment of the utility model, the first sampling tube 5 and the second sampling tube 7 can be synchronously operated to absorb or inject the sample solution, and the solution collection, mixing and fractionation efficiency is high. The first sampling tube 2, the second sampling tube 6 and the third sampling tube 8 are all provided with needles 10 at the bottom, so the mixing sample bottle 100 and the fractionation sample bottle 200 used in the experiment can both adopt headspace bottles, and the sample solution is not easy to be contaminated. When the sample solution is transferred multiple times, the internal connection state is controlled by the first three-way valve 3 and the second three-way valve 4. The needle 10 of the first sampling tube 2 is always inserted in the mixing sample bottle 100, and the needles 10 of the second sampling tube 6 and the third sampling tube 8 are always inserted in the fractionation sample bottle 200. No multiple holes will be generated in the mixing sample bottle 100 and the fractionation sample bottle 200, which further prevents the contamination of the sample solution and is also beneficial to the subsequent preservation of the sample solution.

[0030] In a specific embodiment, the first sampling cylinder 5 and the second sampling cylinder 7 are both provided with scale lines 11 , and the volumes of the sample solutions in the first sampling cylinder 5 and the second sampling cylinder 7 can be accurately controlled by the scale lines 11 .

[0031] In a specific embodiment, the first sampling tube 2, the second sampling tube 6 and the third sampling tube 8 are each provided with a control switch 12, which can control the channel size inside the first sampling tube 2, the second sampling tube 6 and the third sampling tube 8, and can control the rate of sample solution absorption and injection together with the piston push rod 9. For example, when the solution is collected and mixed, the internal channel of the first sampling tube 2 can be appropriately narrowed by the control switch 12, and the piston push rod 9 can be gently pushed to slowly add and mix.

[0032] In a specific embodiment, the first three-way valve 3 , the second three-way valve 4 and the Y-shaped three-way pipe 1 are connected via a hose 13 .

[0033] In a specific embodiment, the Y-shaped three-way pipe 1 is a hard PVC pipe with an outer diameter of 8 mm, an inner diameter of 6 mm, and a total length of 6 cm.

[0034] In a specific embodiment, the first sampling tube 2, the second sampling tube 6, and the third sampling tube 8 are hard PE tubes with an outer diameter of 9 mm, an inner diameter of 8.5 mm, and a length of 10 cm.

[0035] In a specific embodiment, the length of the first sampling cylinder 5 and the second sampling cylinder 7 is 12 cm, the inner diameter is 2 cm, and the length of the piston push rod 9 is 15 cm.

[0036] 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. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid transfer device for collecting, mixing and dispensing solutions, characterized in that: It comprises a Y-shaped three-way tube, the bottom opening of which is connected to a first sampling tube, the two top openings of which are respectively connected to a first three-way valve and a second three-way valve, the other two openings of the first three-way valve are respectively connected to a first sampling cylinder and a second sampling tube, the other two openings of the second three-way valve are respectively connected to a second sampling cylinder and a third sampling tube, piston push rods are respectively arranged in the first sampling cylinder and the second sampling cylinder, and needles are respectively arranged at the bottoms of the first sampling tube, the second sampling tube and the third sampling tube.

2. A liquid transfer device for collecting, mixing and dispensing a solution according to claim 1, characterized in that: The first sampling cylinder and the second sampling cylinder are provided with scale lines.

3. A liquid transfer device for collecting, mixing and dispensing a solution according to claim 1, characterized in that: The first sampling tube, the second sampling tube and the third sampling tube are all provided with a control switch.

4. A liquid transfer device for collecting, mixing and dispensing a solution according to claim 1, characterized in that: The first three-way valve, the second three-way valve and the Y-shaped three-way pipe are connected via a hose.

5. A liquid transfer device for collecting, mixing and dispensing a solution according to claim 1, characterized in that: The Y-shaped three-way pipe is a hard PVC pipe with an outer diameter of 8 mm, an inner diameter of 6 mm and a total length of 6 cm.

6. A liquid transfer device for collecting, mixing and dispensing a solution according to claim 1, characterized in that: The first sampling tube, the second sampling tube and the third sampling tube are hard PE tubes with an outer diameter of 9 mm, an inner diameter of 8.5 mm and a length of 10 cm.

7. A liquid transfer device for collecting, mixing and dispensing a solution according to claim 1, characterized in that: The first sampling cylinder and the second sampling cylinder have a length of 12 cm and an inner diameter of 2 cm, and the length of the piston push rod is 15 cm.

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