Solid-phase extraction device for experimental detection

Abstract

The utility model discloses a solid-phase extraction device for experimental detection, which comprises a solid-phase extraction component, a liquid-phase extraction component, a liquid-phase extraction component, a liquid-phase extraction component, a liquid-phase extraction component and a liquid-phase extraction component, the auxiliary connecting assembly comprises a connecting ring, a connecting rod, a connecting plate and a limiting block; the connecting ring is in threaded connection below the outer surface of the socketed pipe, the connecting rods are fixed to the two sides of the connecting ring, the connecting plates are fixed to the two sides above the connecting pipe, the bottom ends of the connecting rods penetrate through the opposite ends of the connecting plates, and the limiting blocks are rotationally connected to the bottom ends of the connecting rods. By arranging the auxiliary connecting assembly, when the socketed pipe is connected with the top end of the connecting pipe in a sleeved mode, the connecting rod drives the limiting block to be inserted into the bottom end of the connecting plate, then the limiting block is rotated, the two ends of the rotated limiting block are connected with the connecting plate in a clamped mode, and therefore the socketed pipe is promoted to limit the inserted connecting pipe through the connecting rod and the limiting block; the airbag is prevented from being separated from the top end of the connecting pipe due to gradual expansion of a gap at the joint of the socketed pipe and the connecting pipe.

Description

Technical Field

[0001] This utility model relates to the field of solid phase extraction technology, and in particular to a solid phase extraction device for experimental detection. Background Technology

[0002] Solid-phase extraction (SPE) is a sample pretreatment technique that combines the advantages of liquid-solid extraction and liquid chromatography. It uses a solid-phase extraction device to separate, purify, and concentrate experimental samples.

[0003] A search revealed Chinese patent application CN207502474U, which discloses a solid-phase extraction device and its pressurization structure. The device includes a solid-phase extraction column, an elastic gasbag, a connecting tube, a solid-phase extraction column adapter, a first one-way valve, and a second one-way valve. The elastic gasbag interface is connected to the upper end of the connecting tube. The second one-way valve is fitted into and fixed to the mounting hole. The lower part of the adapter is a cylindrical tube tapering downwards, while the upper part is a cylindrical tube adapted to the lower end of the connecting tube. The upper part of the adapter is fixed above the lower part, and the two parts penetrate each other. The lower part of the adapter is adapted to the upper opening of the solid-phase extraction column. The first one-way valve is fixed inside the cylindrical tube in the upper part of the adapter. The first one-way valve is used to discharge gas from the elastic gasbag into the pressurization structure, and the second one-way valve is used to draw air into the elastic gasbag. This solid-phase extraction device and its pressurization structure are not only inexpensive and suitable for small laboratories, but also simple in structure and easy to operate.

[0004] In the existing patent literature, a sleeve is fixedly connected to the bottom of the airbag, and the airbag is sleeved to the top of the connecting tube through the sleeve. Rubber is fixedly connected to the inner side of the sleeve to make the sleeve and the connecting tube firmly connected. However, with long-term use, the rubber of the sleeve will gradually flatten, causing the gap at the connection between the sleeve and the connecting tube to gradually widen, resulting in the airbag and the top of the connecting tube separating. Therefore, it is necessary to propose a solid phase extraction device with auxiliary connection to stabilize the connection between the connecting tube and the sleeve. Utility Model Content

[0005] The purpose of this utility model is to provide a solid phase extraction device for experimental detection, in order to solve the problem mentioned in the above-mentioned patent documents in the background art, where the bottom end of the air bladder is fixedly connected to a sleeve, the air bladder is sleeved to the top end of the connecting tube through the sleeve, and the inner side of the sleeve is fixedly connected with rubber, so that the sleeve and the connecting tube are stably connected. However, when the sleeve is used for a long time, the rubber will gradually flatten, causing the gap at the connection between the sleeve and the connecting tube to gradually widen, resulting in the air bladder and the top end of the connecting tube detaching.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a solid-phase extraction device for experimental detection, comprising:

[0008] A solid-phase extraction assembly, comprising an air bladder, a sleeve, and a connecting tube; the sleeve is fixed to the bottom end of the air bladder, and the top end of the connecting tube is inserted into the bottom end of the sleeve.

[0009] An auxiliary connecting assembly includes a connecting ring, a connecting rod, a connecting plate, and a limiting block. The connecting ring is threaded to the lower outer surface of the sleeve tube, the connecting rod is fixed to both sides of the connecting ring, the connecting plate is fixed to both sides above the connecting tube, the bottom end of the connecting rod passes through the opposite end of the connecting plate, and the limiting block is rotatably connected to the bottom end of the connecting rod.

[0010] Furthermore, the connecting plate has a connecting hole at the point where it passes through the connecting rod, and the connecting hole engages with the limiting block.

[0011] Furthermore, magnetic blocks are fixedly connected to the top of both sides of the limiting block, and the magnetic blocks are attracted to the bottom of the connecting plate.

[0012] Furthermore, limit grooves are provided on both sides of the bottom end of the connecting hole, and a plug-in groove is provided at the bottom end of the limit block. A limit bracket is plugged between the outer ends of the limit groove and the plug-in groove.

[0013] Furthermore, the solid phase extraction assembly also includes a conversion head, an extraction tube, and a liquid addition tube; the top end of the conversion head is inserted into the bottom end of the connecting tube, the top end of the extraction tube is inserted into the bottom end of the conversion head, and the liquid addition tube is fixed to one side above the connecting tube.

[0014] Furthermore, it also includes a rapid rebound component;

[0015] The rapid rebound assembly includes a connecting block, a first spring, and a fixing block; the connecting block is located in the center inside the airbag, the first spring is arranged in a group, which surrounds and fixes the outer end of the connecting block, and the fixing block is fixed to the other end of the first spring.

[0016] Furthermore, the other end of the fixing block is fixedly connected to the center of the inner side of the airbag, and a vertical rod is fixedly connected to the center of the top of the connecting block.

[0017] Furthermore, a second spring is fixedly connected to the periphery of the vertical rod. The second spring is arranged in a set, and its other end is fixedly connected to the upper part of the inner sidewall of the airbag.

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] I. This utility model, by setting an auxiliary connecting component, when the sleeve is sleeved with the top of the connecting tube, the sleeve drives the connecting rod to be inserted into the connecting hole. Since the limiting block is engaged with the connecting hole, the connecting rod drives the limiting block to be inserted to the bottom of the connecting plate. Then, the limiting block is rotated so that both ends of the rotated limiting block are engaged with the connecting plate, thereby causing the sleeve to limit the connected tube after insertion through the connecting rod and the limiting block, further stabilizing the connection between the sleeve and the connecting tube, and preventing the airbag from detaching from the top of the connecting tube due to the gradual widening of the gap at the connection between the sleeve and the connecting tube.

[0020] Second, based on the first beneficial effect, by setting up a rapid rebound component, when the airbag is squeezed, the first and second springs inside contract under the influence of the gripping force, which facilitates the airbag to pressurize the extraction tube. When the hand is released, the first and second springs drive the airbag to rebound quickly, which avoids the airbag not being able to quickly return to its original state after being squeezed, thus preventing the extraction effect of the device from being affected. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the auxiliary connection component structure of this utility model;

[0024] Figure 3 This is an exploded structural diagram of the auxiliary connection component of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the airbag of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the rapid rebound assembly of this utility model.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 11. Airbag; 12. Sleeve tube; 13. Connecting tube; 14. Converter head; 15. Extraction tube; 16. Liquid addition tube; 21. Connecting ring; 22. Connecting rod; 23. Connecting plate; 24. Limiting block; 25. Connecting hole; 26. Magnetic block; 27. Limiting groove; 28. Insertion groove; 29. ​​Limiting frame; 31. Connecting block; 32. Vertical rod; 33. First spring; 34. Fixing block; 35. Second spring. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0032] Please see Figures 1-3 As shown, this embodiment is a solid-phase extraction device for experimental detection, comprising:

[0033] Solid phase extraction assembly, which includes an airbag 11, a sleeve 12 and a connecting tube 13; the sleeve 12 is fixed to the bottom end of the airbag 11, and the top end of the connecting tube 13 is inserted into the bottom end of the sleeve 12.

[0034] The solid phase extraction assembly also includes a converter head 14, an extraction tube 15, and a liquid addition tube 16; the top end of the converter head 14 is inserted into the bottom end of the connecting tube 13, the top end of the extraction tube 15 is inserted into the bottom end of the converter head 14, and the liquid addition tube 16 is fixed to one side above the connecting tube 13.

[0035] The air bladder 11 is used to pressurize the extraction tube 15. The sleeve tube 12 is used to connect the air bladder 11 and the connecting tube 13. The connecting tube 13 is used to connect other components such as the liquid addition tube 16. The conversion head 14 is used to connect the connecting tube 13 and the extraction tube 15. The extraction tube 15 is used to extract the experimental liquid. The liquid addition tube 16 is used to add other liquids into the extraction tube 15.

[0036] The auxiliary connection assembly includes a connecting ring 21, a connecting rod 22, a connecting plate 23, and a limiting block 24. The connecting ring 21 is threaded to the lower outer surface of the sleeve tube 12, the connecting rod 22 is fixed to both sides of the connecting ring 21, the connecting plate 23 is fixed to both sides above the connecting tube 13, the bottom end of the connecting rod 22 passes through the opposite end of the connecting plate 23, and the limiting block 24 is rotatably connected to the bottom end of the connecting rod 22.

[0037] The connecting ring 21 is used to connect the connecting rod 22 and the sleeve 12. The connecting rod 22 is used to connect the limiting block 24. The connecting plate 23 is used for the insertion of the connecting rod 22 and the opening of the connecting hole 25. The limiting block 24 is used to limit the connecting rod 22 after insertion.

[0038] The connecting plate 23 has a connecting hole 25 at the point where it passes through the connecting rod 22, and the connecting hole 25 is engaged with the limiting block 24;

[0039] Magnetic blocks 26 are fixedly connected to the top of both sides of the limiting block 24, and the magnetic blocks 26 are attracted to the bottom of the connecting plate 23.

[0040] The connecting hole 25 is used for the insertion of the connecting rod 22 and the limiting block 24. When the limiting block 24 is in a horizontal vertical state, the limiting block 24 and the connecting hole 25 are engaged. When the limiting block 24 is in a horizontal horizontal state, the top of the limiting block 24 abuts against the bottom of the connecting plate 23. At this time, the magnetic block 26 is attracted to the bottom of the connecting plate 23 by magnetic force.

[0041] Limiting grooves 27 are provided on both sides of the bottom end of the connecting hole 25, and a plug-in groove 28 is provided at the bottom end of the limiting block 24. A limiting bracket 29 is plugged between the outer ends of the limiting groove 27 and the plug-in groove 28.

[0042] The limiting groove 27 is used for insertion at both ends of the limiting frame 29, and the insertion groove 28 is used for insertion at the middle end of the limiting frame 29. When the top end of the limiting block 24 abuts against the bottom end of the connecting plate 23, the two ends and the middle end of the limiting frame 29 are inserted into the limiting groove 27 and the insertion groove 28, so that the limiting frame 29 limits the rotating limiting block 24. At the same time, the two ends and the middle end of the limiting frame 29 are interference fit with the limiting groove 27 and the insertion groove 28.

[0043] Working principle: When the component is not in use, the connecting pipe 13 and the sleeve 12 are not connected. When the component is in use, hold the connecting ring 21 by hand and connect the connecting ring 21 and the sleeve 12 by thread. Then, put the bottom end of the sleeve 12 onto the top end of the connecting pipe 13, so that the sleeve 12 drives the connecting rod 22 and the limiting block 24 to be inserted into the connecting hole 25. At this time, since the limiting block 24 is in a horizontal state, the connecting rod 22 drives the limiting block 24 to be inserted to the bottom end of the connecting plate 23. Then, rotate the limiting block 24 by hand so that the two ends of the rotated limiting block 24 abut against the bottom end of the connecting plate 23. At the same time, the magnetic block 26 is attracted to the bottom end of the connecting plate 23 by magnetic force, thereby causing the sleeve 12 to limit the connected pipe 13 after insertion through the connecting rod 22 and the limiting block 24, further stabilizing the connection between the sleeve 12 and the connecting pipe 13.

[0044] The above steps prevent the airbag 11 from detaching from the top of the connecting tube 13 as the gap at the connection between the sleeve tube 12 and the connecting tube 13 gradually widens.

[0045] Please see Figure 1 , Figures 4-5 As shown, this embodiment, based on the above embodiment, further includes:

[0046] Quick rebound component;

[0047] The quick rebound assembly includes a connecting block 31, a first spring 33, and a fixing block 34. The connecting block 31 is located in the center of the airbag 11. The first springs 33 are arranged in a group, surrounding and fixing the outer end of the connecting block 31 respectively. The fixing block 34 is fixed to the other end of the first spring 33.

[0048] The connecting block 31 is used to connect the first spring 33 to the vertical rod 32. The first spring 33 is used to connect the fixing block 34 to the connecting block 31. The fixing block 34 is used to connect the first spring 33 to the inner wall of the airbag 11. There are five first springs 33 in total.

[0049] The other end of the fixing block 34 is fixedly connected to the center of the inner side of the airbag 11, and a vertical rod 32 is fixedly connected to the center of the top of the connecting block 31.

[0050] A second spring 35 is fixedly connected to the periphery of the vertical rod 32. The second spring 35 is set as a group, and the other end is fixedly connected to the upper part of the inner wall of the airbag 11.

[0051] The vertical rod 32 is used to connect the second spring 35 and limit the lower connecting block 31. There are four second springs 35, which are used to connect the vertical rod 32 to the upper part of the inner wall of the airbag 11, thereby limiting the vertical rod 32 and the connecting block 31.

[0052] Working principle: When the component is not in use, the airbag 11 is not pinched. When the component is in use, the airbag 11 is pinched by hand. At this time, the first spring 33 and the second spring 35 inside the airbag 11 are contracted due to the gripping force, which facilitates the airbag 11 to pressurize the extraction tube 15. Then, the hand is released, the force of squeezing the first spring 33 and the second spring 35 disappears, and the first spring 33 and the second spring 35 react on the airbag 11, causing the first spring 33 and the second spring 35 to drive the airbag 11 to rebound quickly. This prevents the airbag 11 from not being able to quickly return to its original state after being pinched, thus preventing the extraction effect of the device from being affected.

[0053] The above steps can improve its functionality.

[0054] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A solid-phase extraction apparatus for experimental detection, characterized in that, include: A solid-phase extraction assembly, comprising an air bladder (11), a sleeve (12), and a connecting tube (13); the sleeve (12) is fixed to the bottom end of the air bladder (11), and the top end of the connecting tube (13) is inserted into the bottom end of the sleeve (12); The auxiliary connection assembly includes a connecting ring (21), a connecting rod (22), a connecting plate (23), and a limiting block (24). The connecting ring (21) is threaded to the lower outer surface of the sleeve pipe (12), the connecting rod (22) is fixed to both sides of the connecting ring (21), the connecting plate (23) is fixed to both sides above the connecting pipe (13), the bottom end of the connecting rod (22) passes through the opposite end of the connecting plate (23), and the limiting block (24) is rotatably connected to the bottom end of the connecting rod (22).

2. The solid-phase extraction apparatus for experimental detection according to claim 1, characterized in that, The connecting plate (23) has a connecting hole (25) at the point where it passes through the connecting rod (22), and the connecting hole (25) is engaged with the limiting block (24).

3. The solid-phase extraction apparatus for experimental detection according to claim 1, characterized in that, The top two sides of the limiting block (24) are fixedly connected with magnetic blocks (26), and the magnetic blocks (26) are attracted to the bottom of the connecting plate (23).

4. The solid-phase extraction apparatus for experimental detection according to claim 2, characterized in that, Limiting grooves (27) are provided on both sides of the bottom end of the connecting hole (25), and a plug-in groove (28) is provided at the bottom end of the limiting block (24). A limiting bracket (29) is plugged between the outer ends of the limiting groove (27) and the plug-in groove (28).

5. The solid-phase extraction apparatus for experimental detection according to claim 1, characterized in that, The solid phase extraction assembly also includes a converter head (14), an extraction tube (15), and a liquid addition tube (16); the top end of the converter head (14) is inserted into the bottom end of the connecting tube (13), the top end of the extraction tube (15) is inserted into the bottom end of the converter head (14), and the liquid addition tube (16) is fixed on one side above the connecting tube (13).

6. The solid-phase extraction apparatus for experimental detection according to claim 1, characterized in that, It also includes a rapid rebound component; The rapid rebound assembly includes a connecting block (31), a first spring (33), and a fixing block (34); the connecting block (31) is located in the center inside the airbag (11), the first spring (33) is arranged in a group, which surrounds and fixes the outer end of the connecting block (31), and the fixing block (34) is fixed to the other end of the first spring (33).

7. A solid-phase extraction apparatus for experimental detection according to claim 6, characterized in that, The other end of the fixing block (34) is fixedly connected to the center of the inner side of the airbag (11), and a vertical rod (32) is fixedly connected to the center of the top of the connecting block (31).

8. The solid-phase extraction apparatus for experimental detection according to claim 7, characterized in that, The vertical rod (32) is fixedly connected to a second spring (35) on its periphery. The second spring (35) is set as a set, and the other end is fixedly connected to the upper part of the inner wall of the airbag (11).

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