Concentrated organic solution pipettor

Abstract

The utility model discloses a concentrated organic solution pipettor which comprises a long suction pipe, the bottom end of the long suction pipe is fixedly connected with an elbow used for sucking liquid, the outer side of the long suction pipe is provided with scale marks used for judging volume, and the top end of the long suction pipe is provided with a silica gel head used for sucking liquid. And a pressing mechanism for fixedly mounting the silica gel head is arranged between the long suction pipe and the silica gel head. By arranging the long suction tube and the elbow, a concentrated solution at the bottom of the bottle can be quickly and efficiently sucked, the concentrated solution is prevented from excessively volatilizing and wasting after passing through the bottle opening, by arranging the scale marks, the approximate volume of the concentrated solution can be more efficiently judged, the judgment on a concentration end point is facilitated, the preparation of a sample is easier and more convenient, and the production efficiency is improved. By arranging the silica gel head, the silica gel head can be fixed through the pressing mechanism, so that the installation of the silica gel head is effectively improved, the long suction tube and the silica gel head can be quickly assembled and used, and the use convenience is improved.

Description

Technical Field

[0001] The utility model relates to the field of pipettes, in particular to a concentrated organic solution pipette. Background Art

[0002] In the method of determining petroleum hydrocarbons in water by gas chromatography, the sample preparation must be concentrated twice, and the second time it needs to be accurately determined. The concentration device used in the laboratory is a rotary evaporator. The evaporation bottle mouth of the concentration device is a coarse ground bottle mouth. When the sample volume is concentrated to less than 1ml, it is difficult to pour it out through the bottle mouth. The concentrated organic liquid is easy to evaporate, and the bottom of the bottle is large, so it is difficult to determine the end point of concentration, which makes it difficult to pipette the concentrated liquid and easily causes evaporation waste during the pipetting process. Utility Model Content

[0003] The purpose of the utility model is to provide a concentrated organic solution pipette to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a concentrated organic solution pipette, comprising a long straw, the bottom end of which is fixedly connected to an elbow for aspirating liquid, the outside of the long straw is provided with a volume judgment scale line, the top end of the long straw is provided with a silicone rubber head for aspirating liquid, and a clamping mechanism for fixing and installing the silicone rubber head is provided between the long straw and the silicone rubber head.

[0005] Preferably, the clamping mechanism comprises a mounting ring, the mounting ring is fixedly connected to the top end of the long straw, and pressing rods are provided on both sides of the mounting ring.

[0006] Preferably, a clamping joint is provided at the bottom end of the silicone rubber head, and the clamping joint is provided on the inner side of the mounting ring.

[0007] Preferably, two arc-shaped limiting rings are symmetrically arranged on the inner side of the mounting ring, the arc-shaped limiting rings are fixedly connected to the ends of the pressing rod, and rubber pads are arranged on the outer sides of the arc-shaped limiting rings.

[0008] Preferably, an inner groove is provided on the inner side of the mounting ring, a guide rod is fixedly connected to the inner side of the inner groove, a slider is slidably connected to the outer side of the guide rod, a connecting block is fixedly connected to one side of the slider, and the connecting block is fixedly connected to the outer side of the pressing rod.

[0009] Preferably, a spring is arranged on the outer side of the guide rod, and one end of the spring is arranged on the outer side of the sliding block.

[0010] Technical effects and advantages of the utility model:

[0011] The utility model provides a long straw with an elbow at the end thereof, which can quickly and efficiently absorb the concentrated liquid at the bottom of the bottle, avoiding the concentrated liquid from volatilizing and wasting too much through the bottle mouth; a scale line is provided on the outside of the long straw, which can more efficiently determine the approximate volume of the concentrated liquid, and is conducive to determining the concentration end point, making the preparation of the sample easier and more convenient; a silicone rubber head is provided on the top of the long straw, which can be fixed by a clamping mechanism, effectively improving the installation of the silicone rubber head, so that the long straw and the silicone rubber head can be quickly assembled and used, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0013] Figure 2 It is a partial structural schematic diagram of the utility model.

[0014] Figure 3 It is a schematic diagram of the top view of the mounting ring in the utility model.

[0015] Figure 4 for Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0016] In the figure: a long straw 1; an elbow 11; a scale line 12; a mounting ring 13; an inner groove 131; a guide rod 1311; a spring 1312; a slider 1313; a connecting block 1314; a silicone rubber head 2; a clamping joint 21; a pressing rod 3; an arc-shaped limit ring 4; and a rubber pad 41. DETAILED DESCRIPTION

[0017] 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.

[0018] The utility model provides Figure 1-4The pipette for concentrated organic solution shown in the figure comprises a long straw 1, the bottom end of the long straw 1 is fixedly connected with an elbow 11 for aspirating liquid, the outer side of the long straw 1 is provided with a scale line 12 for volume judgment, the top end of the long straw 1 is provided with a silicone rubber head 2 for aspirating liquid, and a clamping mechanism for fixing the silicone rubber head 2 is provided between the long straw 1 and the silicone rubber head 2. By providing the long straw 1 and the elbow 11 at the end of the long straw 1, the concentrated liquid at the bottom of the bottle can be quickly and efficiently aspirated, avoiding the concentrated liquid from volatilizing and wasting due to excessive passing through the bottle mouth. A scale line 12 is arranged on the outside, which can more efficiently determine the approximate volume of the concentrated liquid, is conducive to judging the concentration end point, and makes the preparation of the sample easier and more convenient. A silicone rubber head 2 is arranged at the top of the long straw 1, and the silicone rubber head 2 can be fixed by a clamping mechanism, which effectively improves the installation of the silicone rubber head 2, so that the long straw 1 and the silicone rubber head 2 can be quickly assembled and used, which improves the convenience of use. A protruding sealing ring is also arranged at the end of the silicone rubber head 2, which can better fit with the installation ring and can be used for better sealing when the limit ring is displaced;

[0019] For example, the clamping mechanism includes a mounting ring 13, which is fixedly connected to the top of the long straw 1. Pressing rods 3 are provided on both sides of the mounting ring 13. By providing a silicone rubber head 2 at the top of the long straw 1, the silicone rubber head 2 can be fixed by the clamping mechanism, which effectively improves the installation of the silicone rubber head 2, so that the long straw 1 and the silicone rubber head 2 can be quickly assembled and used, which improves the convenience of use. When in use, the long straw 1 and the silicone rubber head 2 are quickly assembled and used, and the elbow 11 and the long straw 1 are inserted into the inner side of the rotary evaporator to perform liquid extraction. The amount of the concentrated liquid sucked in can be effectively observed by setting the scale line 12, and the concentration end point can be effectively judged;

[0020] For another example, a clamping joint 21 is provided at the bottom end of the silicone rubber head 2, and the clamping joint 21 is provided on the inner side of the mounting ring 13. Two arc-shaped limiting rings 4 are symmetrically provided on the inner side of the mounting ring 13. The arc-shaped limiting ring 4 is fixedly connected to the end of the pressing rod 3, and a rubber pad 41 is provided on the outer side of the arc-shaped limiting ring 4. By providing the arc-shaped limiting ring 4, when the clamping joint 21 is placed on the inner side of the mounting ring 13, the setting of the arc-shaped limiting ring 4 can effectively press the clamping joint 21 against the inner wall of the mounting ring 13, and the rubber pad 41 provided on the outer side of the arc-shaped limiting ring 4 can effectively increase the sealing between the arc-shaped limiting ring 4, the clamping joint 21 and the mounting ring 13;

[0021] Furthermore, an inner groove 131 is provided on the inner side of the mounting ring 13, a guide rod 1311 is fixedly connected to the inner side of the inner groove 131, a slider 1313 is slidably connected to the outer side of the guide rod 1311, a connecting block 1314 is fixedly connected to one side of the slider 1313, the connecting block 1314 is fixedly connected to the outer side of the pressing rod 3, a spring 1312 is provided on the outer side of the guide rod 1311, one end of the spring 1312 is provided on the outer side of the slider 1313, by fixing the guide rod 1311 on the inner side of the inner groove 131 and slidingly connecting the slider 1313 on the outer side of the guide rod 1311, the sliding stability of the slider 1313 can be effectively improved, by fixing the connecting block 1314 on one side of the slider 1313, the connecting block 1314 is fixedly connected to one side of the pressing rod 3, so that pulling the pressing rod 3 can effectively drive the connecting block 1314 to move, thereby driving the slider 1313 to move, and by setting a spring 1312 on the outer side of the guide rod 1311 There is a spring 1312, which is arranged on one side of the slider 1313, so that the spring 1312 can effectively limit the slider 1313. When in use, in the initial position, the spring 1312 presses the slider 1313 against the inner side of the inner groove 131, and the end of the pressing rod 3 is fixedly connected with an arc-shaped limiting ring 4, so that the initial position of the arc-shaped limiting ring 4 is close to the side wall of the mounting ring 13. When the clamping joint 21 needs to be installed, the pressing rod 3 is pressed inward. The arc-shaped limit ring 4 inside the mounting ring 13 is driven inward, and the clamping joint 21 is placed between the arc-shaped limit ring 4 and the mounting ring 13. The pressing rod 3 is loosened so that the arc-shaped limit ring 4 presses the clamping joint 21 against the inner wall of the mounting ring 13. When the pressing rod 3 is pressed toward the inside of the mounting ring 13, the spring 1312 can effectively act as a resistance to the slider 1313, thereby acting on the pressing rod 3. When the pressing rod 3 is released, the spring 1312 will press the pressing rod 3 again.

[0022] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concentrated organic solution pipette, comprising a long pipette (1), characterized in that: The bottom end of the long straw (1) is fixedly connected to an elbow (11) for aspirating liquid, the outer side of the long straw (1) is provided with a scale line (12) for determining volume, the top end of the long straw (1) is provided with a silicone rubber head (2) for aspirating liquid, and a clamping mechanism for fixing and installing the silicone rubber head (2) is provided between the long straw (1) and the silicone rubber head (2); the clamping mechanism comprises a mounting ring (13), the mounting ring (13) is fixedly connected to the top end of the long straw (1), and pressing rods (3) are provided on both sides of the mounting ring (13); Two arc-shaped limiting rings (4) are symmetrically arranged on the inner side of the mounting ring (13), the arc-shaped limiting rings (4) are fixedly connected to the end of the pressing rod (3), and a rubber pad (41) is arranged on the outer side of the arc-shaped limiting ring (4); An inner groove (131) is provided on the inner side of the mounting ring (13), a guide rod (1311) is fixedly connected to the inner side of the inner groove (131), a slider (1313) is slidably connected to the outer side of the guide rod (1311), a connecting block (1314) is fixedly connected to one side of the slider (1313), and the connecting block (1314) is fixedly connected to the outer side of the pressing rod (3).

2. A concentrated organic solution pipette according to claim 1, characterized in that: A clamping joint (21) is provided at the bottom end of the silicone rubber head (2), and the clamping joint (21) is arranged on the inner side of the mounting ring (13).

3. A concentrated organic solution pipette according to claim 1, characterized in that: A spring (1312) is arranged on the outside of the guide rod (1311), and one end of the spring (1312) is arranged on the outside of the sliding block (1313).

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