Multi-channel sample vacuum solid phase extraction device

Abstract

The utility model relates to solid phase extraction device technical field, concretely relates to multichannel sample vacuum solid phase extraction device, including extraction cylinder, the bottom end fixed mounting of extraction cylinder has the conical hopper, the bottom discharge end of conical hopper is installed with the unloading valve, the top of extraction cylinder detachably installs the top cover, a plurality of solid material input pipes are fixedly installed on the top cover, the fixed mounting of solid material input pipe has the feed valve, the top side edge cylinder body of extraction cylinder is fixedly installed with a plurality of liquid pipes, the fixed mounting of liquid pipe has liquid valve, the bottom end pipe body of solid material input pipe and the bottom end pipe body of liquid pipe all insert to the liquid level in extraction cylinder, the top cylinder body of extraction cylinder is fixedly installed with the suction pipe, and the end of suction pipe is connected with vacuum pump. The utility model is convenient for multichannel material addition, has the advantage that the valve part is protected.

Description

Technical Field

[0001] This utility model relates to the field of solid phase extraction device technology, and more specifically, to a multi-channel sample vacuum solid phase extraction device. Background Technology

[0002] In fields such as environmental monitoring, food testing, and drug analysis, solid-phase extraction is a core technology for sample pretreatment, and its efficiency and accuracy directly determine the reliability of subsequent analytical results. When performing solid-phase extraction, a corresponding solid-phase extraction device is usually used.

[0003] Traditional solid-phase extraction devices have single sample channels, requiring repeated operations for batch processing, which is time-consuming and inefficient. They cannot simultaneously add samples to multiple channels at once, affecting the efficiency of raw material addition.

[0004] Furthermore, in traditional solid-phase extraction (SPE) devices, there is a significant gap between the pipes and the liquid surface inside the device, preventing the pipes from being fully submerged. This causes the vacuum force during subsequent vacuuming operations to act on the valves in the pipes, resulting in adverse effects on the valves due to the large negative pressure, thus affecting their lifespan. Therefore, we propose a multi-channel sample vacuum solid-phase extraction device. Utility Model Content

[0005] The purpose of this invention is to provide a multi-channel sample vacuum solid-phase extraction device to address the deficiencies mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A multi-channel sample vacuum solid-phase extraction device includes an extraction cylinder, a conical hopper fixedly installed at the bottom of the extraction cylinder, a discharge valve installed at the bottom outlet of the conical hopper, a detachable top cover installed at the top of the extraction cylinder, multiple solid material input tubes fixedly installed on the top cover, feed valves fixedly installed on the solid material input tubes, multiple liquid tubes fixedly installed on the top side of the extraction cylinder, liquid valves fixedly installed on the liquid tubes, the bottom ends of the solid material input tubes and the bottom ends of the liquid tubes being inserted into the liquid surface inside the extraction cylinder; a suction tube fixedly installed on the top of the extraction cylinder, the end of the suction tube being connected to a vacuum pump.

[0007] Preferably, a top support is fixedly installed on the top cylinder of the extraction cylinder, and the top cover is detachably installed on the upper surface of the top support by a plurality of fastening bolts; This feature facilitates the installation and removal of the top cover.

[0008] Preferably, a sealing ring is provided between the top cover and the top support, and the sealing ring has an annular structure; This setting can improve the sealing effect.

[0009] Preferably, a feed hood is fixedly installed at the top of the solid material input pipe, and the feed hood is funnel-shaped; This setting makes it easier to add solid materials.

[0010] Preferably, the liquid valve is equipped with an external connector at its end, which is connected to an external liquid delivery pipeline.

[0011] Preferably, reinforcing supports are fixedly installed between the solid material input pipe and the top cover, and between the liquid pipe and the extraction cylinder; This feature ensures a more robust and stable structure for both the solid material input pipe and the liquid input pipe.

[0012] Preferably, the suction tube is equipped with an electric valve and a pressure gauge.

[0013] Preferably, a limit ring is fixedly installed on the inner wall of the suction end tube of the suction tube, a hollow stud is threadedly connected to the suction end tube of the suction tube, an impurity blocking mesh is fixedly installed on the inner wall of the hollow stud, and a hollow knob is fixedly installed on the front side of the hollow stud. This setting prevents internal impurities from being drawn into the vacuum pump.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the setting of an extraction cylinder, multiple solid material input pipes fixedly installed on the top cover and the feeding valve on the pipe body, together with multiple liquid pipes on the top side of the extraction cylinder and the liquid valve on the pipe body, realizes the simultaneous input of solid materials and liquid extractants through multiple channels, and can complete the material addition of batch samples without repeated operations, which greatly shortens the batch processing time.

[0015] 2. This utility model inserts the bottom end of the solid material input tube and the bottom end of the liquid tube into the liquid surface inside the extraction cylinder. Combined with the electric valve and pressure gauge on the suction tube, it avoids the negative pressure acting directly on the feed valve and liquid valve during vacuuming, reducing the wear and tear on the valve parts caused by negative pressure, thus protecting the valve structure and extending its service life.

[0016] 3. This utility model achieves convenient disassembly and assembly, good sealing and structural stability of the device by setting a top support, a top cover that can be detached and installed by fastening bolts and an annular sealing ring between the two, together with the reinforced supports on the solid material input pipe and the liquid pipe, and the impurity blocking net in the suction pipe, while preventing impurities from being sucked into the vacuum pump. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is one of the partial structural schematic diagrams of this utility model; Figure 4 This is the second partial structural schematic diagram of the present utility model; The meanings of the labels in the diagram are as follows: 1. Extraction cylinder; 10. Conical hopper; 11. Discharge valve; 12. Top support; 13. Top cover; 14. Sealing ring; 2. Solid material input pipe; 20. Feed valve; 21. Feed hood; 3. Liquid pipe; 30. Liquid valve; 31. External pipe; 4. Reinforce the supports; 5. Suction tube; 50. Electric valve; 51. Pressure gauge; 52. Vacuum pump; 53. Limit ring; 54. Hollow stud; 55. Knob; 56. Impurity blocking mesh. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4This utility model provides a technical solution: a multi-channel sample vacuum solid-phase extraction device, including an extraction cylinder 1, a conical hopper 10 fixedly installed at the bottom end of the extraction cylinder 1, a discharge valve 11 installed at the bottom outlet end of the conical hopper 10, a top cover 13 detachably installed at the top of the extraction cylinder 1, multiple solid material input pipes 2 fixedly installed on the top cover 13, a feed valve 20 fixedly installed on the solid material input pipes 2, multiple liquid pipes 3 fixedly installed on the top side cylinder of the extraction cylinder 1, a liquid valve 30 fixedly installed on the liquid pipes 3, and the bottom end of the solid material input pipes 2 and the... The bottom end of the liquid tube 3 is inserted into the liquid surface inside the extraction cylinder 1. A suction tube 5 is fixedly installed on the top cylinder of the extraction cylinder 1. The end of the suction tube 5 is connected to a vacuum pump 52, which allows batch samples to be simultaneously fed with solid materials and liquid extractants through multiple channels without repeated operations. At the same time, since the bottom end of the solid material feeding tube 2 and the bottom end of the liquid tube 3 are inserted into the liquid surface inside the extraction cylinder 1, a certain liquid seal is formed, which avoids the negative pressure from directly acting on the feed valve 20 and the liquid valve 30 during vacuuming, thereby improving processing efficiency and protecting the valves to extend their service life.

[0020] like Figure 1 and Figure 2 As shown, a top support 12 is fixedly installed on the top cylinder of the extraction cylinder 1. The top cover 13 is detachably installed on the upper surface of the top support 12 by multiple fastening bolts, making the installation and removal of the top cover 13 more convenient and facilitating subsequent cleaning, maintenance or component replacement of the inside of the extraction cylinder 1, thus reducing the difficulty of operation.

[0021] like Figure 2 As shown, a sealing ring 14 is provided between the top cover 13 and the top support 12. The sealing ring 14 has an annular structure, which significantly improves the sealing effect between the top cover 13 and the extraction cylinder 1, avoids air leakage during the vacuuming process, ensures a stable vacuum environment inside the extraction cylinder 1, and guarantees the smooth progress of the solid phase extraction reaction.

[0022] like Figure 1 As shown, a feed hood 21 is fixedly installed at the top of the solid material input pipe 2. The feed hood 21 is funnel-shaped, so that the solid material can slide smoothly down into the solid material input pipe 2 along the feed hood 21 when it is input.

[0023] like Figure 1 As shown, an external pipe 31 is installed at the end of the liquid valve 30. The external pipe 31 is connected to an external liquid delivery pipeline, so that the liquid extractant can be stably delivered to the extraction cylinder 1 through the external delivery pipeline, the external pipe 31, and the liquid pipe 3, without the need for manual addition, thus improving the continuity and convenience of liquid addition.

[0024] like Figure 1As shown, reinforcing supports 4 are fixedly installed between the solid material input pipe 2 and the top cover 13, and between the liquid pipe 3 and the extraction cylinder 1, making the installation structure of the solid material input pipe 2 and the liquid pipe 3 more robust and stable.

[0025] Specifically, an electric valve 50 is installed on the suction pipe 5, and a pressure gauge 51 is also installed on the suction pipe 5. This allows the operator to precisely control the start and stop of vacuuming and adjust the vacuum level through the electric valve 50, and to monitor the pressure status inside the extraction cylinder 1 in real time through the pressure gauge 51, so as to avoid sudden pressure changes that could cause the extract to boil violently or damage the equipment, and ensure the safe and stable extraction process.

[0026] Furthermore, a limit ring 53 is fixedly installed on the inner wall of the suction end of the suction tube 5, and a hollow stud 54 is threaded onto the suction end of the suction tube 5. An impurity blocking net 56 is fixedly installed on the inner wall of the hollow stud 54, and a hollow knob 55 is fixedly installed on the front side of the hollow stud 54. This allows solid impurities generated during the extraction process to be intercepted by the impurity blocking net 56, preventing them from being sucked into the vacuum pump 52 and causing equipment damage. At the same time, the impurity blocking net 56 can be cleaned or replaced by unscrewing the hollow stud 54 through the knob 55, ensuring long-term stable operation of the device.

[0027] Finally, it should be noted that the vacuum pump 52, electric valve 50, pressure gauge 51, corresponding vacuum suction control system, and external power supply involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adapted controllers and power supplies, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0028] When using the multi-channel sample vacuum solid phase extraction device of this utility model, check that the top cover 13 of the extraction cylinder 1 is firmly fixed to the top support 12 by fastening bolts, and that the annular sealing ring 14 between the top cover 13 and the top support 12 fits tightly. Close the discharge valve 11 at the bottom of the conical bucket 10, the feed valve 20 on the solid material input pipe 2 and the liquid valve 30 on the liquid pipe 3, and connect the external pipe 31 at the end of the liquid valve 30 to the external liquid conveying pipe. Open the liquid valve 30 and inject the extractant into the extraction cylinder 1 through the external pipe 31 and the liquid pipe 3. Open the feed valve 20 and add solid material, ensuring that the bottom of the solid material feed pipe 2 and the liquid pipe 3 are inserted into the liquid surface to form a liquid seal. Close the liquid valve 30 and the feed valve 20, start the vacuum pump 52, open the electric valve 50 on the suction pipe 5, and monitor and adjust the vacuum degree through the pressure gauge 51. After extraction is complete, turn off vacuum pump 52 and electric valve 50, open feed valve 20 to balance the pressure, and after the pressure is balanced, open discharge valve 11 to discharge the material.

[0029] 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-channel sample vacuum solid-phase extraction device, comprising an extraction cylinder (1), characterized in that: A conical hopper (10) is fixedly installed at the bottom of the extraction cylinder (1). A discharge valve (11) is installed at the bottom discharge end of the conical hopper (10). A top cover (13) is detachably installed on the top of the extraction cylinder (1). Multiple solid material input pipes (2) are fixedly installed on the top cover (13). A feed valve (20) is fixedly installed on the solid material input pipes (2). Multiple liquid pipes (3) are fixedly installed on the top side cylinder of the extraction cylinder (1). A liquid valve (30) is fixedly installed on the liquid pipes (3). The bottom end of the solid material input pipes (2) and the bottom end of the liquid pipes (3) are both inserted into the liquid surface inside the extraction cylinder (1). A suction pipe (5) is fixedly installed on the top cylinder of the extraction cylinder (1). A vacuum pump (52) is connected to the end of the suction pipe (5).

2. The multi-channel sample vacuum solid-phase extraction device according to claim 1, characterized in that: A top support (12) is fixedly installed on the top cylinder of the extraction cylinder (1), and the top cover (13) is detachably installed on the upper surface of the top support (12) by a number of fastening bolts.

3. The multi-channel sample vacuum solid-phase extraction device according to claim 2, characterized in that: A sealing ring (14) is provided between the top cover (13) and the top support (12), and the sealing ring (14) has an annular structure.

4. The multi-channel sample vacuum solid-phase extraction device according to claim 1, characterized in that: The top end of the solid material input pipe (2) is fixedly installed with a feed hood (21), which is funnel-shaped.

5. The multi-channel sample vacuum solid-phase extraction device according to claim 1, characterized in that: The liquid valve (30) is equipped with an external pipe (31) at its end, which is connected to an external liquid delivery pipeline.

6. The multi-channel sample vacuum solid-phase extraction device according to claim 1, characterized in that: Reinforcing supports (4) are fixedly installed between the solid material input pipe (2) and the top cover (13), and between the liquid pipe (3) and the extraction cylinder (1).

7. The multi-channel sample vacuum solid-phase extraction device according to claim 1, characterized in that: An electric valve (50) is provided on the suction tube (5), and a pressure gauge (51) is also provided on the suction tube (5).

8. The multi-channel sample vacuum solid-phase extraction device according to claim 1, characterized in that: A limiting ring (53) is fixedly installed on the inner wall of the suction end tube of the suction tube (5). A hollow stud (54) is threaded onto the suction end tube of the suction tube (5). An impurity blocking net (56) is fixedly installed on the inner wall of the hollow stud (54). A hollow knob (55) is fixedly installed on the front side of the hollow stud (54).

Images