Support device for solid-phase extraction

Abstract

The utility model discloses a support device for solid-phase extraction, which belongs to the field of solid-phase extraction and comprises a box body, a base and a top cover, and the base and the top cover are respectively arranged at the bottom end and the top end of the box body. A lifting assembly used for driving the top cover to ascend and descend is arranged on the base. The lifting assembly comprises electric push rods fixed to the top end of the base in a diagonal mode, and the output ends of the electric push rods are fixedly connected with the bottom end of the top cover. The lifting assembly further comprises extension rod pieces fixed to the top end of the base in a diagonal mode, and the top ends of the extension rod pieces are fixedly connected with the bottom end of the top cover. According to the support device, through the arranged lifting assembly, vertical lifting adjustment can be conducted on the top cover and the flow adjustment control assembly on the top cover through the electric push rod, and a waste liquid box or a test tube rack in the box body can be conveniently taken and placed; and the phenomenon that the liquid medicine in the solid-phase extraction tube on the flow regulation control assembly flows out due to inclination of the top cover caused by misoperation when the waste liquid box or the test tube rack is taken and placed is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of solid phase extraction, in particular to a support device for solid phase extraction. Background Art

[0002] The solid phase extraction support device is an auxiliary device used in the solid phase extraction (SPE) process in the laboratory, which aims to improve experimental efficiency and operational convenience. It is widely used in sample pretreatment processes in environmental monitoring, drug analysis, food inspection and other fields.

[0003] Upon investigation, the Chinese utility model patent with publication number CN207614405U discloses a solid phase extraction support device. This device is designed to meet the functions of SPE elution, sample purification, sample collection, etc., based on the characteristics of SPE columns, volumetric flasks and sample bottles commonly used in laboratories, making the SPE sample purification process more convenient, and can achieve solid phase extraction of multiple samples at the same time, improving work efficiency. However, during the solid phase extraction process, the device is prone to cause waste liquid to re-enter the waste liquid collection tank from the waste liquid backflow port under vacuum negative pressure, which is easy to cause the inner wall of the collection tank to form a water wall that is difficult to clean. A search revealed that during use of the existing solid phase extraction support device, a waste liquid box for collecting waste liquid is placed inside the box body in the early stage to prevent waste liquid from flowing into the box body. Due to the volume limitation of the waste liquid box, the liquid in the waste liquid box needs to be discharged from time to time during the extraction process, and then the top cover needs to be moved upward by hand, and then the waste liquid box in the box body is taken out. During this process, if the operation is improper, the top cover is easily tilted, causing the liquid inside the solid phase extraction tube to flow out.

[0004] Therefore, the utility model provides a support device for solid phase extraction to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The utility model provides a support device for solid phase extraction, aiming to solve the problem that when the waste liquid tank needs to be cleaned during the extraction process of the existing support device for solid phase extraction proposed in the background technology, improper operation may easily cause the top cover to tilt, causing the liquid inside the solid phase extraction tube to flow out.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a support device for solid phase extraction, comprising a box body and a base and a top cover respectively arranged at the bottom and top of the box body, an exhaust pipe is fixedly plugged on the box body, and a plurality of flow regulating control components are arranged on the top cover;

[0009] The difference from the existing support device is that: the base is provided with a lifting assembly for driving the top cover to rise and fall; the lifting assembly includes an electric push rod fixed to the top of the base in a diagonal manner, and the output end of the electric push rod is fixedly connected to the bottom end of the top cover; the top cover and the flow regulating control assembly thereon can be vertically lifted and lowered by the electric push rod, so that the waste liquid box or test tube rack in the box can be conveniently taken in and out, and the phenomenon of the liquid in the solid phase extraction tube on the flow regulating control assembly flowing out due to the tilt of the top cover caused by operating errors when taking in and out the waste liquid box or test tube rack can be avoided;

[0010] Among them, in order to further improve the stability of the top cover lifting, the lifting assembly also includes an extension rod fixed to the top end of the base in a diagonal manner, and the top end of the extension rod is fixedly connected to the bottom end of the top cover; the extension rod is composed of a fixed sleeve and a sliding rod, the sliding rod is inserted into the fixed sleeve, and the end of the fixed sleeve opposite to the sliding rod is fixedly connected to the bottom end of the base and the top cover respectively.

[0011] Preferably, a vacuum pressure gauge is fixedly mounted on the top end of the exhaust pipe.

[0012] Preferably, a pressure relief knob is threadedly inserted into one end of the exhaust pipe, and a pressure relief hole is formed on the outer wall of one end of the exhaust pipe close to the pressure relief knob.

[0013] Preferably, a sealing ring which is sleeved on the outside of the pressure relief knob is fixedly embedded in one end of the exhaust pipe away from the box body, and a pressure relief port corresponding to the pressure relief hole is opened on the sealing ring.

[0014] Preferably, the flow regulating and controlling assembly comprises an extraction column fixed on and plugged into the top cover, and a flow guide tube is threadedly plugged into the extraction column.

[0015] Preferably, an outer wall fixing sleeve of the flow guide pipe is provided with an outer gear ring.

[0016] Preferably, the bracket device also includes a positioning frame plate which is sleeved in the box body and used to be sleeved on the bottom of the waste liquid box, and the top of the inner wall of the positioning frame plate is fixedly connected with two opposing arc plates, and the top side of the positioning frame plate is provided with a plurality of through holes; the positioning frame plate can be used to position and install the waste liquid box, so as to avoid the phenomenon that the waste liquid box is misaligned with the flow regulating control component on the top cover during installation, causing the waste liquid to drip into the inside of the box body; the arc plate is used to facilitate the guiding and positioning installation of the bottom of the waste liquid box, thereby improving the boundary line of the installation; the through hole is conical in shape, that is, the bottom port diameter is larger than the top port diameter, and during use, the internal air of the box body is negatively pressurized, so that the positioning frame plate can be stably adsorbed on the bottom wall of the box body.

[0017] Preferably, the four corners of the top of the positioning frame plate are fixedly connected with positioning cylinders for positioning the internal test tube rack support rods; the port of the positioning cylinder is wide-mouthed, that is, the diameter of the top port is larger than the diameter of the bottom port, which is convenient for the support rod to be inserted into the positioning cylinder. The positioning cylinder can be used to position the bottom of the test tube rack support rod to ensure the stability of the test tube and the guide tube relative to each other.

[0018] (III) Beneficial effects

[0019] The bracket device is equipped with a lifting component, which can vertically lift and lower the top cover and the flow regulating control component thereon through an electric push rod, so as to facilitate the taking and placing of the waste liquid box or the test tube rack in the box body, and avoid the phenomenon that the liquid in the solid phase extraction tube on the flow regulating control component flows out due to the tilting of the top cover caused by operating errors when taking and placing the waste liquid box or the test tube rack.

[0020] The bracket device uses a positioning frame plate to position and install the waste liquid box, so as to avoid the waste liquid box being misaligned with the flow regulating control component on the top cover during installation, which may cause the waste liquid to drip into the box body; the arc plate is used to facilitate the guiding and positioning installation of the bottom of the waste liquid box, so as to improve the boundary line of the installation; the through hole is in a cone shape, that is, the bottom port diameter is larger than the top port diameter, and during use, the internal air of the box body is negatively pressurized, so that the positioning frame plate can be stably adsorbed on the bottom wall of the box body; the positioning cylinder can be used to position the bottom of the test tube rack support rod, so as to ensure the stability of the test tube and the guide tube relative to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a support device for solid phase extraction;

[0022] Figure 2 for Figure 1 The middle part of the structure is sectional view;

[0023] Figure 3 Schematic diagram of the internal structure of the exhaust pipe;

[0024] Figure 4 This is a schematic diagram of the positioning frame structure.

[0025] In the figure:

[0026] 1. Box body; 2. Base; 3. Top cover; 4. Flow regulation control assembly; 41. Extraction column; 42. Flow guide tube; 43. External gear ring; 5. Exhaust pipe; 51. Pressure relief knob; 52. Sealing ring; 53. Pressure relief hole; 6. Vacuum pressure gauge; 7. Lifting assembly; 71. Electric push rod; 72. Extension rod; 8. Positioning frame plate; 81. Arc plate; 82. Through hole; 83. Positioning cylinder. DETAILED DESCRIPTION

[0027] 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.

[0028] Example 1

[0029] The utility model provides a support device for solid phase extraction, such as Figure 1-4 As shown, the bracket device includes a box body 1 and a base 2 and a top cover 3 respectively arranged at the bottom and top of the box body 1, an exhaust pipe 5 is fixedly plugged on the box body 1, and a plurality of flow regulating control components 4 are arranged on the top cover 3;

[0030] The base 2 is provided with a lifting assembly 7 for driving the top cover 3 to rise and fall; the lifting assembly 7 includes an electric push rod 71 fixed to the top of the base 2 in a diagonal manner, and the output end of the electric push rod 71 is fixedly connected to the bottom end of the top cover 3; the top cover 3 and the flow regulating control assembly 4 thereon can be vertically lifted and lowered by the electric push rod 71, so as to facilitate the taking and placing of the waste liquid box or the test tube rack in the box body 1, and avoid the phenomenon that the top cover 3 is tilted due to an operational error when taking and placing the waste liquid box or the test tube rack, causing the liquid inside the solid phase extraction tube on the flow regulating control assembly 4 to flow out;

[0031] Among them, in order to further improve the stability of the lifting and lowering of the top cover 3, the lifting assembly 7 also includes an extension rod 72 fixed to the top end of the base 2 in a diagonal manner, and the top end of the extension rod 72 is fixedly connected to the bottom end of the top cover 3; the extension rod 72 is composed of a fixed sleeve and a sliding rod, the sliding rod is inserted into the fixed sleeve, and the end of the fixed sleeve opposite to the sliding rod is fixedly connected to the bottom end of the base 2 and the top cover 3 respectively. The extension rod 72 can be used to further improve the stability of the lifting and lowering of the top cover 3.

[0032] Specifically, a vacuum pressure gauge 6 is fixedly installed at the top of the exhaust pipe 5; the vacuum pressure inside the box body 1 can be observed in real time through the pressure gauge.

[0033] Specifically, a pressure relief knob 51 is threadedly inserted into one end of the exhaust pipe 5, and a pressure relief hole 53 is opened on the outer wall of one end of the exhaust pipe 5 close to the pressure relief knob 51; the pressure inside the box body 1 can be relieved through the pressure relief hole 53, which facilitates opening the top cover 3, and one end of the exhaust pipe 5 can be sealed through the pressure relief knob 51, and the pressure relief hole 53 can also be sealed.

[0034] Furthermore, a sealing ring 52 is fixedly embedded in one end of the exhaust pipe 5 away from the box body 1 and is sleeved on the outside of the pressure relief knob 51. The sealing ring 52 is provided with a pressure relief port corresponding to the pressure relief hole 53. The sealing ring 52 is made of a corrosion-resistant and wear-resistant rubber material. The sealing ring 52 can improve the sealing effect of the pressure relief knob 51 on the pressure relief hole 53.

[0035] Specifically, the flow regulating and controlling assembly 4 includes an extraction column 41 fixed on and plugged into the top cover 3 , and a flow guide tube 42 is threadedly plugged into the extraction column 41 .

[0036] Furthermore, an outer wall fixed sleeve of the flow guide tube 42 is provided with an outer toothed ring 43 , and the tightness of the flow guide tube 42 on the extraction column 41 can be conveniently adjusted through the outer toothed ring 43 .

[0037] Example 2

[0038] See attached Figure 2 and attached Figure 4 As shown, the bracket device also includes a positioning frame plate 8 which is sleeved in the box body 1 and is used to be sleeved on the bottom of the waste liquid box. The top of the inner wall of the positioning frame plate 8 is fixedly connected with two opposite arc plates 81, and the top side of the positioning frame plate 8 is provided with a plurality of through holes 82; the positioning frame plate 8 can be used to position and install the waste liquid box to avoid the phenomenon that the waste liquid box is misaligned with the flow regulating control component 4 on the top cover 3 during installation, which causes the waste liquid to drip into the box body 1; the arc plate 81 is used to facilitate the guiding and positioning installation of the bottom of the waste liquid box, thereby improving the boundary line of the installation; the through hole 82 is conical in shape, that is, the bottom port diameter is larger than the top port diameter. During use, by applying negative pressure to the internal air of the box body 1, it is convenient to stably adsorb the positioning frame plate 8 on the bottom wall of the box body 1;

[0039] When in use, the waste liquid box is directly placed in the box body 1 , and then the bottom of the waste liquid box is guided and positioned by the characteristics of the arc plate 81 , so that the bottom of the waste liquid box is clamped on the inner circle of the positioning frame plate 8 .

[0040] Furthermore, the four corners of the top of the positioning frame plate 8 are fixedly connected with positioning cylinders 83 for positioning the internal test tube rack support rods; the port of the positioning cylinder 83 is wide-mouthed, that is, the diameter of the top port is larger than the diameter of its bottom port, which is convenient for the support rod to be inserted into the positioning cylinder 83. The positioning cylinder 83 can be used to position the bottom of the test tube rack support rod to ensure the stability of the test tube and the guide tube 42 relative to each other.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A support device for solid phase extraction, comprising a housing (1) and a base (2) and a top cover (3) respectively arranged at the bottom and top of the housing (1), an exhaust pipe (5) being fixedly connected to the housing (1), and a plurality of flow regulating control components (4) being arranged on the top cover (3); Features: The base (2) is provided with a lifting assembly (7) for driving the top cover (3) to rise and fall; The lifting assembly (7) comprises an electric push rod (71) fixed at a diagonal position on the top of the base (2), and the output end of the electric push rod (71) is fixedly connected to the bottom end of the top cover (3); The lifting assembly (7) further comprises an extension rod (72) fixed at a diagonal position on the top end of the base (2), and the top end of the extension rod (72) is fixedly connected to the bottom end of the top cover (3).

2. The solid phase extraction support device according to claim 1, characterized in that: A vacuum pressure gauge (6) is fixedly mounted on the top end of the exhaust pipe (5).

3. The solid phase extraction support device according to claim 1, characterized in that: A pressure relief knob (51) is threadedly inserted at one end of the exhaust pipe (5), and a pressure relief hole (53) is provided on the outer wall of one end of the exhaust pipe (5) close to the pressure relief knob (51).

4. The solid phase extraction support device according to claim 3, characterized in that: A sealing ring (52) which is sleeved on the outside of the pressure relief knob (51) is fixedly embedded in one end of the exhaust pipe (5) away from the box body (1), and a pressure relief port corresponding to the pressure relief hole (53) is opened on the sealing ring (52).

5. The solid phase extraction support device according to claim 1, characterized in that: The flow regulating and controlling assembly (4) comprises an extraction column (41) fixed on and plugged into the top cover (3), and a flow guide tube (42) is threadedly plugged into the extraction column (41).

6. The solid phase extraction support device according to claim 5, characterized in that: An outer toothed ring (43) is fixedly sleeved on the outer wall of the flow guide pipe (42).

7. The solid phase extraction support device according to claim 1, characterized in that: The support device also includes a positioning frame plate (8) which is sleeved in the box body (1) and is used to be sleeved on the bottom of the waste liquid box, and the top end of the inner wall of the positioning frame plate (8) is fixedly connected with two opposing arc-shaped plates (81), and the top side of the positioning frame plate (8) is provided with a plurality of through holes (82).

8. The solid phase extraction support device according to claim 7, characterized in that: The four corners of the top end of the positioning frame plate (8) are fixedly connected with positioning cylinders (83) for positioning the internal test tube rack support rods.

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