Collecting pipe self-flowing type solid-phase extraction device

Abstract

The utility model discloses a collecting pipe self-flowing type solid-phase extraction device which comprises a supporting base, an upper positioning plate located above the supporting base and a plurality of extraction pipes fixedly installed on the top of the upper positioning plate, and a test tube rack capable of moving front and back is arranged on the supporting base. The test tube rack comprises an upper supporting plate, a lower supporting plate and a supporting pin fixed between the upper supporting plate and the lower supporting plate, a sample insertion hole and a waste liquid insertion hole are formed in the top of the upper supporting plate, and a sample test tube and a waste liquid test tube are inserted into the sample insertion hole and the waste liquid insertion hole respectively. According to the utility model, the positions of the sample test tube and the waste liquid test tube are flexibly adjusted through the traction test tube rack, so that the sample test tube and the waste liquid test tube can be aligned with the liquid outlet end of the extraction tube, the whole process is labor-saving, and high-strength carrying work is not needed; the guide pipe connected with the top end of the extraction pipe cannot be twisted, and normal circulation of liquid is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of chemical analysis instrument technology, specifically to a collection tube self-flowing solid phase extraction device. Background Technology

[0002] Solid phase extraction (SPE) is increasingly widely used in laboratories as a sample pretreatment technique. It is mainly used for the separation, purification and concentration of samples. It can effectively separate analytes and interfering components, reduce the sample pretreatment process, and is simple to operate, saving time and effort. It is widely used in many fields such as pesticide residue detection, food analysis, medicine, and commodity inspection.

[0003] Existing solid-phase extraction (SPE) devices, during activation, sample loading, and washing, primarily discharge liquid from the SPE column consisting of impurities and interfering substances, necessitating waste liquid collection. Similarly, during the final elution step, sample liquid collection is required. While existing technologies include test tubes for collecting waste liquid and samples, switching between them is inconvenient. For instance, utility model patent CN221385297U discloses a SPE device where, by first aligning the cover plate with the waste liquid collection box, activation, sample loading, and washing can then proceed sequentially. During the experimental operation, the wastewater generated in these processes flows into the waste liquid collection box. When elution is finally required, simply open the cover, turn it around, and put it back on the shell. At this time, the guide channel on the cover is aligned with the different test tubes on the test tube rack. In this way, the target substance generated from the solid phase extraction column during the final elution process will flow into the test tube through the guide channel. Since there are a large number of guide channels, adjusting the direction is quite difficult. In addition, the liquid inlet at the top of the guide channel is often connected to the external test tube, making it difficult to adjust the direction. This can cause the test tube to twist and affect the flow of liquid. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a gravity-flow solid-phase extraction device with a collection tube, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a self-flowing solid-phase extraction device for collecting tubes, comprising a support base, an upper positioning plate located above the support base, and a plurality of extraction tubes fixedly installed on the top of the upper positioning plate. The support base is provided with a test tube rack that can move back and forth. The test tube rack includes an upper support plate, a lower support plate, and a support pin fixed between the upper support plate and the lower support plate. The top of the upper support plate is provided with a sample insertion hole and a waste liquid insertion hole, and a sample test tube and a waste liquid test tube are respectively inserted into the sample insertion hole and the waste liquid insertion hole.

[0008] Preferably, a T-shaped groove is formed at the top of the support base, the T-shaped groove is arranged along the front-back direction, and a slider is fixedly connected to the bottom of the lower support plate.

[0009] Preferably, positioning pins are fixedly connected to both the front and rear ends of the slider, positioning holes are formed in the front and rear side walls inside the T-shaped groove, and when the slider moves to the front and rear limit positions of the T-shaped groove, the positioning pins are inserted into the corresponding positioning holes.

[0010] Preferably, a valve is provided on the extraction tube for controlling the flow of liquid.

[0011] Preferably, a plurality of support rods distributed in a rectangular shape are fixedly connected between the upper positioning plate and the support base.

[0012] Preferably, a handle is fixedly connected to the front side wall of the upper support plate, and the handle is in a square shape with a loop in the middle.

[0013] (III) Advantageous Effects

[0014] The utility model provides a self-flowing solid-phase extraction device for a collection tube, which has the following advantageous effects:

[0015] 1. In the utility model, the positions of the sample test tube and the waste liquid test tube are flexibly adjusted by pulling the test tube rack, so that both the sample test tube and the waste liquid test tube can be aligned with the liquid outlet end of the extraction tube. The whole process is relatively labor-saving and does not require high-intensity handling work; moreover, it will not cause distortion to the conduit connected to the top end of the extraction tube, ensuring the normal flow of liquid.

[0016] 2. In the utility model, the slider can slide inside the T-shaped groove, and when the slider moves to the front and rear limit positions, the waste liquid test tube and the sample test tube respectively correspond to the position of the liquid outlet end of the extraction tube, so as to achieve the collection purpose; furthermore, through the cooperation of the positioning pin and the positioning hole, the position of the slider is locked to ensure the stability of the positions of the waste liquid test tube and the sample test tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front perspective structural view of a self-flowing solid-phase extraction device for a collection tube proposed by the utility model;

[0018] Figure 2 is the sectional perspective structural view of a self-flowing solid-phase extraction device for a collection tube proposed by the utility model;

[0019] Figure 3 is the partial structural view of a self-flowing solid-phase extraction device for a collection tube proposed by the utility model;

[0020] Figure 4This is a structural diagram of a test tube rack for a self-flowing solid-phase extraction device with a collection tube, as proposed in this utility model.

[0021] Figure 5 for Figure 2 Enlarged structural diagram at point A.

[0022] In the diagram: 1. Upper positioning plate; 2. Support base; 201. T-shaped groove; 202. Positioning hole; 3. Support rod; 4. Extraction tube; 5. Valve; 6. Test tube rack; 61. Upper support plate; 611. Sample insertion hole; 612. Waste liquid insertion hole; 62. Lower support plate; 63. Support pin; 64. Slider; 65. Positioning pin; 66. Handle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1 to 5 This utility model provides a technical solution: a self-flowing solid-phase extraction device for collecting tubes, including a support base 2, an upper positioning plate 1 located above the support base 2, and a plurality of extraction tubes 4 fixedly installed on the top of the upper positioning plate 1. The support base 2 is provided with a test tube rack 6 that can move back and forth. The test tube rack 6 includes an upper support plate 61, a lower support plate 62, and a support pin 63 fixed between the upper support plate 61 and the lower support plate 62. The top of the upper support plate 61 is provided with a sample insertion hole 611 and a waste liquid insertion hole 612. Sample test tubes and waste liquid test tubes are respectively inserted into the sample insertion hole 611 and the waste liquid insertion hole 612.

[0025] Liquid is introduced from the inlet end at the top of the extraction tube 4 for liquid processing; the positions of the sample tube and waste liquid tube are flexibly adjusted by the traction test tube rack 6 so that the sample tube and waste liquid tube can be aligned with the outlet end of the extraction tube 4. The whole process is relatively labor-saving and does not require high-intensity handling; and it will not cause twisting of the conduit connected to the top of the extraction tube 4, ensuring normal liquid flow.

[0026] In order to guide the test tube rack 6 in a straight line, a T-shaped groove 201 is provided on the top of the support base 2. The T-shaped groove 201 is set along the front and back direction, and a slider 64 is fixedly connected to the bottom of the lower support plate 62.

[0027] The slider 64 is fixedly connected to both ends of the front and rear ends with positioning pins 65. The front and rear side walls of the T-shaped groove 201 are provided with positioning holes 202. When the slider 64 moves to the front and rear limit positions of the T-shaped groove 201, the positioning pins 65 are inserted into the corresponding positioning holes 202. The positioning pins 65 and the positioning holes 202 are in clearance fit.

[0028] The slider 64 can slide inside the T-shaped groove 201. When the slider 64 moves to the front and rear limit positions, the waste liquid test tube and the sample test tube correspond to the liquid outlet positions of the extraction tube 4, thereby achieving the collection purpose. Furthermore, through the cooperation of the positioning pin 65 and the positioning hole 202, the positioning pin 65 is inserted into the corresponding positioning hole 202 to lock the position of the slider 64, ensuring the stability of the positions of the waste liquid test tube and the sample test tube.

[0029] The extraction tube 4 is equipped with a valve 5 to control the flow of liquid. When it is necessary to switch the positions of the waste liquid test tube and the sample test tube, the valve 5 is closed first to prevent the liquid from continuing to flow out. After the position is adjusted, the valve 5 is opened again.

[0030] Multiple rectangularly distributed support rods 3 are fixedly connected between the upper positioning plate 1 and the support base 2 to support the upper positioning plate 1.

[0031] A handle 66 is fixedly connected to the front side wall of the upper support plate 61. The handle 66 is U-shaped. By pulling the handle 66, the entire test tube rack 6 can be pulled to adjust the position of the waste liquid test tube and the sample test tube.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A gravity flow solid phase extraction device for collecting tubes, characterized by: Including support base (2), the upper positioning plate (1) above support base (2) and the multiple extraction tubes (4) of fixed installation in the top of upper positioning plate (1), be provided with the test tube rack (6) of movable front and back on support base (2), test tube rack (6) includes upper support plate (61), lower support plate (62) and support pin (63) fixed between upper support plate (61) and lower support plate (62), the top of upper support plate (61) is equipped with sample insertion hole (611) and waste liquid insertion hole (612), the sample insertion hole (611) and waste liquid insertion hole (612) are respectively inserted with sample test tube and waste liquid test tube.

2. The gravity flow solid phase extraction device of claim 1, wherein: The top of support base (2) is equipped with a T-shaped groove (201), the T-shaped groove (201) is arranged along the front and back direction, the bottom of lower support plate (62) is fixedly connected with sliding block (64).

3. The gravity flow solid phase extraction device of claim 2, wherein: The front and back ends of sliding block (64) are fixedly connected with positioning pin (65), the front and back side walls of T-shaped groove (201) are both equipped with positioning hole (202), when sliding block (64) moves to the front and back limit positions of T-shaped groove (201), positioning pin (65) is inserted into the corresponding positioning hole (202).

4. The gravity flow solid phase extraction device of claim 1, wherein: The extraction tube (4) is provided with a valve (5) for controlling the flow of liquid.

5. The gravity flow solid phase extraction device of claim 1, wherein: The upper positioning plate (1) and support base (2) are fixedly connected with a plurality of rectangularly distributed support rods (3).

6. The gravity flow solid phase extraction device of claim 1, wherein: The front side wall of upper support plate (61) is fixedly connected with handle (66), and handle (66) is in the shape of a back.

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