A laboratory solid phase extraction device

Abstract

The utility model provides a kind of solid phase extraction device for laboratory belongs to extraction frame technical field, the solid phase extraction device for laboratory has upper hole plate, upper hole plate is provided with at least one hole site for accommodating liquid receiving tube, characterized in that, lower hole plate is equipped with in the directly below of upper hole plate, lower hole plate is provided with at least one small hole corresponding with hole site;Every hole site is equipped with four vertical clamps for positioning liquid receiving tube, vertical clamp includes the upper camber and lower camber of inclination setting, rubber pad is fixedly installed on lower camber, and rubber pad and the outer circumferential surface of liquid receiving tube abut;By the multiple vertical clamps of synchronous external removal and repositioning after external removal, it is convenient to be applicable to different specifications of liquid receiving tube;The utility model solves the technical problem that different specifications of liquid receiving tube are not convenient to apply, leading to narrow application range.

Description

Technical Field

[0001] This utility model belongs to the field of extraction rack technology, specifically, it relates to a solid phase extraction device for laboratory use. Background Technology

[0002] Solid-phase extraction of sample extracts is a common laboratory procedure for separating, concentrating, and purifying analytes. This procedure requires specific equipment for placing the solid-phase extraction column and for storing and receiving the liquid. The utility model patent application number CN201820241204.8 (publication number CN208260246U) discloses a structural improvement of a solid-phase extraction collector, including an extraction column, a liquid receiving tube, and a liquid receiving tube placement rack. The solid-phase extraction collector has a platform below the extraction column. The liquid receiving tube placement rack is composed of a bottom plate, a side plate, and a horizontal plate. The horizontal plate has a liquid receiving tube receiving hole, which is a U-shaped hole with a front opening. The U-shaped hole has protruding locking parts at the edges on both sides of its opening. A U-shaped plastic clip is provided at the U-shaped hole. The inner side of the plastic clip has protruding elastic locking parts on both sides. The plastic clip has a slot along its outer wall. The plastic clip is fixed to the U-shaped liquid receiving tube receiving hole through the slot on its outer wall. The aforementioned patent allows for the use of only one type of receiving tube, while for different types of receiving tubes, the entire extraction column needs to be replaced, resulting in a narrow range of applications. Utility Model Content

[0003] In view of this, the present invention provides a laboratory solid phase extraction device to solve the technical problem mentioned in the background art, which is inconvenient to use with liquid receiving tubes of different specifications, resulting in a narrow range of applications.

[0004] This utility model is implemented as follows: This utility model provides a laboratory solid phase extraction device, which has an upper perforated plate with at least one hole for accommodating a liquid receiving tube. A lower perforated plate is provided directly below the upper perforated plate, and the lower perforated plate has at least one small hole corresponding to the hole. Each of the holes is provided with four vertical clamps for positioning the receiving liquid pipe. Each vertical clamp includes an inclined upper arc surface and a lower arc surface. A rubber pad is fixedly installed on the lower arc surface, and the rubber pad abuts against the outer circumference of the receiving liquid pipe.

[0005] Based on the above technical solution, the laboratory solid-phase extraction device of this utility model can be further improved as follows: Furthermore, multiple guide plates are slidably connected to the top wall of the upper perforated plate, and four guide plates arranged in a ring array are provided on the outside of each perforation.

[0006] Furthermore, a circular hole is provided on the side of the guide plate opposite to the vertical clamping plate. One end of a compression spring is fixedly installed on the inner end face of the circular hole, and the other end of the compression spring is fixedly installed on the support plate. The support plate is fixedly installed on the top wall of the upper hole plate.

[0007] Furthermore, it also includes a base plate, the left end of which is rotatably connected to a rotating column via a bearing, and a concentrically arranged bidirectional lead screw is fixedly installed on the rotating column. Both the upper and lower threads of the bidirectional lead screw are threaded with screw blocks.

[0008] Furthermore, the right wall of the upper screw block is fixedly connected to the middle of the left wall of the upper hole plate, and the right wall of the lower screw block is fixedly connected to the middle of the left wall of the lower hole plate. Furthermore, guide blocks are fixedly installed on the middle of the right wall of both the upper and lower perforated plates. The guide blocks are slidably connected to the guide rod, and the guide rod is fixedly installed on the base plate.

[0009] Compared with existing technologies, the advantages of the laboratory solid-phase extraction device provided by this utility model are: By setting a bidirectional lead screw, the upper and lower orifice plates can be brought closer to or further apart from each other. The purpose is to adjust their height according to the length specifications of the liquid receiving tube, control the distance between the top of the liquid receiving tube and the bottom of the extraction column, and facilitate better coordination. By setting the upper arc surface to be inclined, it is easy to insert the liquid receiving pipe and open the vertical clamp plate. Under the action of the compression spring, the liquid receiving pipe is positioned through the lower arc surface to prevent it from tipping over. The multiple vertical clamps that can move outward synchronously and can be reset after being moved outward make it easy to adapt to liquid receiving tubes of different specifications. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0011] Figure 1 A front view of the overall structure of a laboratory solid-phase extraction device; Figure 2 This is a top view of the overall structure at the hole location; Figure 3 Axonometric drawing of the internal structure of the hole; Figure 4 for Figure 3 The main view; Figure 5Axonometric view of a single hole, its guide groove, and its internal mechanism; Figure 6 Axonometric drawing of the guide component; The attached diagram lists the components represented by each number as follows: 1. Upper perforated plate; 10. Hole position; 11. Lower perforated plate; 12. Small hole; 13. Guide groove; 20. Rubber pad; 21. Vertical clamping plate; 211. Upper arc surface; 212. Lower arc surface; 22. Guide plate; 23. Round hole; 24. Compression spring; 25. Support plate; 31. Base plate; 32. Rotating column; 33. Two-way lead screw; 34. Screw block; 35. Guide block; 36. Guide rod; 41. Cylindrical rod. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] Example 1 like Figure 1-5 As shown, this utility model provides a laboratory solid phase extraction device, which has an upper perforated plate 1, and the upper perforated plate 1 has at least one hole 10 for accommodating a liquid receiving tube. A lower perforated plate 11 is provided directly below the upper perforated plate 1, and the lower perforated plate 11 has at least one small hole 12 corresponding to the hole 10. Each hole 10 is provided with four vertical clamps 21 for positioning the receiving liquid pipe. The vertical clamps 21 include an inclined upper arc surface 211 and a lower arc surface 212. A rubber pad 20 is fixedly installed on the lower arc surface 212, and the rubber pad 20 abuts against the outer circumference of the receiving liquid pipe.

[0018] Optionally, in the above technical solution, multiple guide plates 22 are slidably connected to the top wall of the upper perforated plate 1, and four guide plates 22 arranged in a ring array are provided outside each hole position 10.

[0019] Optionally, in the above technical solution, a circular hole 23 is provided on the opposite side of the guide plate 22 and the vertical clamping plate 21. One end of a compression spring 24 is fixedly installed on the inner end face of the circular hole 23, and the other end of the compression spring 24 is fixedly installed on the support plate 25. The support plate 25 is fixedly installed on the top wall of the upper hole plate 1.

[0020] Optionally, the above technical solution also includes a base plate 31, the left end of which is rotatably connected to a rotating column 32 via a bearing, and a concentrically arranged bidirectional lead screw 33 is fixedly installed on the rotating column 32. Both the upper and lower threads of the bidirectional lead screw 33 are threaded with screw blocks 34.

[0021] Optionally, in the above technical solution, the right wall of the upper screw block 34 is fixedly connected to the middle of the left wall of the upper hole plate 1, and the right wall of the lower screw block 34 is fixedly connected to the middle of the left wall of the lower hole plate 11.

[0022] Optionally, in the above technical solution, guide blocks 35 are fixedly installed on the middle of the right wall of both the upper perforated plate 1 and the lower perforated plate 11. The guide blocks 35 are slidably connected to the guide rod 36, and the guide rod 36 is fixedly installed on the base plate 31.

[0023] Among them, such as Figure 6It also features an adjustable guide assembly consisting of three cylindrical rods 41, with adjacent cylindrical rods 41 slidably connected. A compression spring 24 is fitted onto the outer circumferential surface of the guide assembly. The two ends of the guide assembly (the outer end faces of the cylindrical rods 41) are respectively fixedly installed on the inner end faces of the circular holes 23 and the opposite faces of the support plate 25 and the guide plate 22. This prevents the vertical clamping plate 21 from tilting and affecting the compression of the compression spring 24, ensuring that the compression spring 24 can stretch and contract stably in the radial direction and provide a continuous and uniform clamping force. Combined with the anti-slip friction of the rubber pad 20, it can maintain stable clamping of the docking liquid tube under static laboratory conditions.

[0024] The center points of hole 10 and small hole 12 correspond one-to-one. The diameter of small hole 12 should be smaller than the minimum diameter of the liquid receiving tube body that is compatible with hole 10 (to prevent the tube body from slipping into small hole 12). The maximum diameter of the liquid receiving tube body that is compatible with hole 10 should not exceed that of hole 10.

[0025] The liquid receiving tube adapted in this application has a conical bottom structure with the tip located at the bottommost end.

[0026] The range of the outward movement of the vertical clamping plate 21 is equal to the distance between the opposite sides of the support plate 25 and the guide plate 22, and the length of the guide groove is greater than the distance between the support plate 25 and the guide plate 22.

[0027] Furthermore, each hole 10 has a guide groove 13 that extends vertically through the upper hole plate 1 on its inner circumferential surface. The guide groove 13 is correspondingly set with the support plate 25. When the liquid receiving pipe is inserted and the vertical clamping plate 21 and the guide plate 22 are expanded outward, the vertical clamping plate 21 moves outward along the guide groove 13. The guide plate 22 is always partially slidably connected to the top wall of the upper perforated plate 1, and the vertical clamping plate 21 is always partially slidably connected to the guide groove 13.

[0028] In this design, the connecting line between the centers of the two corresponding vertical clamping plates 21 within each hole position 10 corresponds to the two diagonals of the square. That is, the vertical clamping plates 21 are not arranged in a front-back, left-right manner on the upper hole plate 1, but are rotated by 45°. This distribution can save the horizontal and vertical space outside the hole position 10. The four vertical clamping plates 21 are evenly distributed at 90° intervals along the circumference of the hole position 10, forming a symmetrical four-point radial constraint on the receiving pipe. The clamping force is uniform and symmetrical, which can effectively prevent the receiving pipe from rolling or radially shifting.

[0029] Preferably, a linear bearing is fixedly installed inside the guide block 35, and the linear bearing is slidably connected to the guide rod 36, which is a cylindrical shaft; Preferably, a square sleeve is fixedly installed on the outer periphery of the rotating column 32 to facilitate the rotation of the rotating column 32.

[0030] When in use, the device is located below the extraction column. After completing the initial cleaning, activation and other preparations, place the device below the extraction column and align the liquid receiving tube with the extraction column. The tube that needs to receive and contain liquid is inserted into the corresponding hole 10 from above the upper orifice plate 1 (initially, the spacing between the multiple vertical clamping plates 21 is the smallest). It first passes through the upper arc surface 211 and slides down along it. Based on the inclined upper arc surface 211, the four upper arc surfaces 211 within one hole 10 form a frustum-shaped structure, gradually decreasing in size from top to bottom. Therefore, during the insertion of the liquid receiving tube into the hole 10, it pushes the vertical clamping plates 21 outward (compression spring 24 is squeezed). Under the action of the guide groove 13, the compression spring 24 contracts along its own central axis (i.e., in the direction of the guide groove 13, without offset) until it matches the diameter of the liquid receiving tube. At this time, the lower arc surface 212 clamps the liquid receiving tube with the rubber pad 20 and presses the bottom end of the liquid receiving tube against the lower orifice plate 11, with the lowest tip inserted into the small hole 12. It can form a radial limit at the bottom of the liquid receiving tube, and together with the clamping of the upper vertical clamping plate 21, it forms a double positioning from top to bottom to prevent the liquid receiving tube from tilting. Depending on the length of the receiving pipe, turn the rotating column 32 to make it rotate the double-acting screw 33 in place. The double-acting screw 33 rotates clockwise and counterclockwise, causing the two screw blocks 34 to move closer and further apart. Under the restriction of the guide block 35 sliding vertically along the guide rod 36, the upper orifice plate 1 and the lower orifice plate 11 move vertically relative to each other until the appropriate distance between the upper orifice plate 1 and the lower orifice plate 11 is adjusted (this adjustment can be made before or after the receiving pipe is inserted into the hole 10). The upper orifice plate 1 and the lower orifice plate 11 are adjusted synchronously. When the length of the liquid receiving tube is large, the upper orifice plate 1 moves upward and the lower orifice plate 11 moves downward simultaneously, so that the distance between them is adapted to the length of the liquid receiving tube. At the same time, the advantage of moving the lower orifice plate 11 downward is that it can lower the position of the bottom end of the liquid receiving tube, so that the whole tube moves downward relative to the upper extraction column. When the length of the liquid receiving tube is small, the upper orifice plate 1 moves downward and the lower orifice plate 11 moves upward simultaneously, so that the distance between them is adapted to the length of the liquid receiving tube. At the same time, the advantage of moving the lower orifice plate 11 upward is that it can lower the position of the bottom end of the liquid receiving tube, so that the whole tube moves upward relative to the upper extraction column.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A laboratory solid-phase extraction apparatus, comprising an upper perforated plate (1), said upper perforated plate (1) having at least one orifice (10) for receiving a liquid receiving tube, characterized in that, A lower perforated plate (11) is provided directly below the upper perforated plate (1), and at least one small hole (12) corresponding to the hole position (10) is provided on the lower perforated plate (11); Each of the holes (10) is provided with four vertical clamps (21) for positioning the receiving liquid pipe. The vertical clamps (21) include an inclined upper arc surface (211) and a lower arc surface (212). A rubber pad (20) is fixedly installed on the lower arc surface (212), and the rubber pad (20) abuts against the outer circumferential surface of the receiving liquid pipe.

2. The laboratory solid-phase extraction apparatus according to claim 1, characterized in that, Multiple guide plates (22) are slidably connected to the top wall of the upper perforated plate (1), and four guide plates (22) are arranged in a ring array outside each of the perforated positions (10).

3. A laboratory solid-phase extraction apparatus according to claim 2, characterized in that, The guide plate (22) has a circular hole (23) on the side opposite to the vertical clamping plate (21). One end of a compression spring (24) is fixedly installed on the inner end face of the circular hole (23). The other end of the compression spring (24) is fixedly installed on the support plate (25). The support plate (25) is fixedly installed on the top wall of the upper hole plate (1).

4. A laboratory solid-phase extraction apparatus according to claim 1, characterized in that, It also includes a base plate (31), the left end of which is rotatably connected to a rotating column (32) via a bearing, and a concentrically arranged bidirectional lead screw (33) is fixedly installed on the rotating column (32), with screw blocks (34) threadedly connected to the upper and lower threads of the bidirectional lead screw (33).

5. A laboratory solid-phase extraction apparatus according to claim 4, characterized in that, The right wall of the upper screw block (34) is fixedly connected to the middle of the left wall of the upper hole plate (1), and the right wall of the lower screw block (34) is fixedly connected to the middle of the left wall of the lower hole plate (11).

6. A laboratory solid-phase extraction apparatus according to claim 5, characterized in that, Guide blocks (35) are fixedly installed on the middle of the right wall of both the upper perforated plate (1) and the lower perforated plate (11). The guide blocks (35) are slidably connected to the guide rod (36), and the guide rod (36) is fixedly installed on the base plate (31).

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