An extraction device for chemical laboratory testing

Abstract

The utility model discloses an extraction device for chemical laboratory detection, include: collecting pipe, the one end intercommunication of collecting pipe is provided with first connecting pipe, and the other end is provided with the plugging head, the upper portion intercommunication of collecting pipe is provided with a plurality of second connecting pipes, and the upper portion of second connecting pipe is provided with the burette, and the upper portion of burette is provided with the storage liquid funnel, and the cooperation place of storage liquid funnel of burette is fixed through the clamping of fixed clamp, and the upper portion of storage liquid funnel is provided with the flushing unit, the liquid outlet of first connecting pipe is communicated with the suction filter bottle through the pipeline and is provided with the intercommunication, the upper portion of suction filter bottle is provided with first connector, and the lateral wall of first connector is provided with liquid inlet and suction port, and the liquid inlet is communicated with first connecting pipe, and the suction port is communicated with vacuum pump, through being provided with flushing unit on the upper portion of storage liquid funnel, reduce the impurity residue of storage liquid funnel inner wall, guarantee the accuracy of experiment from the source, reduce the probability of repeated experiment, improve the overall experimental efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of extraction equipment technology, and specifically relates to an extraction device for chemical laboratory testing. Background Technology

[0002] Solid-phase extraction (SPE) is a sample pretreatment technique developed in recent years, combining liquid-solid extraction (LC-SPIE) and column liquid chromatography (LC-LC). It is primarily used for sample separation, purification, and concentration. Compared to traditional liquid-liquid extraction, it can improve analyte recovery, more effectively separate analytes from interfering components, reduce sample pretreatment steps, and is simple, time-saving, and labor-saving. It is widely used in pharmaceuticals, food, environmental protection, commodity inspection, and chemical industries.

[0003] Solid-phase extraction (SPE) utilizes the separation principles of selective adsorption and selective elution in liquid chromatography. A common method involves passing a liquid sample solution through an adsorbent to retain the analyte, followed by rinsing away impurities with a solvent of appropriate strength, and then rapidly eluting the analyte with a small amount of solvent, thus achieving rapid separation, purification, and concentration. Alternatively, it can selectively adsorb interfering impurities while allowing the analyte to elute; or simultaneously adsorb impurities and the analyte, followed by selective elution of the analyte with a suitable solvent.

[0004] However, in existing extraction devices, the analyte tends to adhere to the inner wall of the filtration flask during the elution process, requiring manual rinsing by the operator, which is cumbersome. Therefore, this application provides an extraction device for chemical laboratory testing, aiming to simplify the extraction operation process. Utility Model Content

[0005] This invention provides an extraction device for chemical laboratory testing, which aims to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An extraction device for chemical laboratory testing includes: a collection tube, one end of which is connected to a first connecting tube and the other end of which is connected to a sealing head; a plurality of second connecting tubes are connected to the upper part of the collection tube; a Buchner funnel is provided at the upper part of the second connecting tube; a liquid storage funnel is provided at the upper part of the Buchner funnel; the mating part of the liquid storage funnel of the Buchner funnel is clamped and fixed by a fixing clamp; and a rinsing component for rinsing the inner wall of the liquid storage funnel is provided at the upper part of the liquid storage funnel. The liquid outlet of the first connecting tube is connected to the filtration flask via a pipe. The upper part of the filtration flask is provided with a first connector. The side wall of the first connector is provided with a liquid inlet and a vacuum outlet. The liquid inlet is connected to the first connecting tube, and the vacuum outlet is connected to a vacuum pump.

[0007] Furthermore, a regulating valve is provided at the lower part of the second connecting pipe, a limiting flange is provided at the middle of the outer wall of the second connecting pipe, and a sealing ring is provided at the upper part of the limiting flange.

[0008] Furthermore, the lower part of the Buchner funnel is a first extension tube, which extends into the inner cavity of the second connecting tube. A first sleeve is provided on the outer wall of the first extension tube, which is sleeved on the outside of the second connecting tube. The lower end of the first sleeve abuts against the limiting flange. The inner wall of the first sleeve forms a sealing fit with the outer wall of the second connecting tube through a sealing ring. Filter paper is provided in the upper funnel cavity of the Buchner funnel.

[0009] Furthermore, a sealing gasket is provided between the lower end face of the liquid storage funnel and the upper end face of the Buchner funnel.

[0010] Furthermore, the rinsing assembly includes: an upper cover, the lower surface of which is provided with a mating groove for mating with the upper end of the side wall of the liquid storage funnel, and a spray pipe provided in the middle of the upper cover.

[0011] Furthermore, the nozzle includes: a threaded pipe threadedly connected to the upper cover, a nozzle being connected to the lower end of the threaded pipe, an abutting flange being provided on the upper part of the outer side wall of the threaded pipe, and a second connector being provided at the upper end of the threaded pipe, the second connector cooperating with the flushing liquid supply assembly through a pipe.

[0012] Furthermore, support blocks are provided at both ends of the outer wall of the collection tube, and a lifting opening is provided at the upper part of the support block.

[0013] Furthermore, the inner cavity of the collection tube is provided with a flow guide block, and the upper side wall of the flow guide block is inclined to guide the solution to the first connecting tube.

[0014] Furthermore, a second extension tube is provided in the middle of the first connector, the second extension tube is connected to the liquid inlet, and the lower end of the second extension tube is set below the air extraction port.

[0015] Compared with the prior art, the present invention has the following technical effects: 1. The extraction device for chemical laboratory testing described in this utility model, in conjunction with a Buchner funnel, a suction flask, and a vacuum pump, utilizes the principle of suction filtration to accelerate solid-liquid separation. After extraction, the solid-liquid mixture enters the Buchner funnel. Under the negative pressure generated by the vacuum pump, the liquid rapidly flows through the filter paper into the suction flask, while the solid remains on the filter paper, greatly improving separation efficiency and saving significant time compared to ordinary gravity filtration. Furthermore, the rinsing assembly at the top of the storage funnel facilitates rinsing of the inner wall of the storage funnel, reducing impurities remaining on the inner wall. Inaccurate experimental results due to impurities often require repeating the experiment, wasting considerable time, reagents, and samples. By reducing impurities on the inner wall of the storage funnel, the accuracy of the experiment is ensured from the source, reducing the probability of repeated experiments, guaranteeing the accuracy of experimental data, and improving overall experimental efficiency. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of an extraction device for chemical laboratory testing as described in this utility model; Figure 2 This is a schematic diagram of the collection tube portion of an extraction device for chemical laboratory testing according to the present invention; Figure 3 This is a partial cross-sectional view of the collection tube of an extraction device for chemical laboratory testing according to the present invention; Figure 4 This is a schematic diagram of the second connecting tube and the Buchner funnel of an extraction device for chemical laboratory testing according to this utility model; Figure 5 This is a schematic diagram of the Buchner funnel, liquid storage funnel, and rinsing assembly of an extraction device for chemical laboratory testing according to the present invention; Figure 6 This is a cross-sectional view of the first connector of an extraction device for chemical laboratory testing according to the present invention.

[0017] In the picture: 1. Collection pipe; 101. First connecting pipe; 102. Sealing head; 103. Support block; 104. Lifting port; 105. Guide block; 2. Second connecting pipe; 201. Regulating valve; 202. Limiting flange; 203. Sealing ring; 3. Buchner funnel; 301. First extension tube; 302. First sleeve; 303. Filter paper; 4. Liquid storage funnel; 401. Sealing gasket; 5. Flushing assembly; 501. Mating groove; 502. Threaded pipe; 503. Nozzle; 504. Abutment flange; 505. Second connector; 6. Rinse the liquid supply assembly; 7. Vacuum filtration flask; 8. First connector; 801. Liquid inlet; 802. Air extraction port; 803. Second extension tube; 9. Vacuum pump. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments of this application and the accompanying drawings.

[0019] like Figure 1-3 and Figure 6 As shown, an extraction device for chemical laboratory testing includes: a collection tube 1, one end of which is connected to a first connecting tube 101 and the other end is connected to a sealing head 102; a plurality of second connecting tubes 2 are connected to the upper part of the collection tube 1; a Buchner funnel 3 is provided at the upper part of the second connecting tube 2; a liquid storage funnel 4 is provided at the upper part of the Buchner funnel 3; the mating part of the liquid storage funnel 4 of the Buchner funnel 3 is clamped and fixed by a fixing clamp (not shown in the figure); and a rinsing assembly 5 for rinsing the inner wall of the liquid storage funnel 4 is provided at the upper part of the liquid storage funnel 4. The liquid outlet of the first connecting pipe 101 is connected to the filtration flask 7 via a pipe. The upper part of the filtration flask 7 is provided with a first connector 8. The side wall of the first connector 8 is provided with a liquid inlet 801 and a vacuum port 802. The liquid inlet 801 is connected to the first connecting pipe 101, and the vacuum port 802 is connected to the vacuum pump 9.

[0020] The extraction apparatus of this application, in conjunction with a Buchner funnel 3, a filtration flask 7, and a vacuum pump 9, utilizes the principle of vacuum filtration to accelerate solid-liquid separation. After extraction, the solid-liquid mixture enters the Buchner funnel 3. Under the negative pressure generated by the vacuum pump 9, the liquid rapidly flows through the filter paper 303 into the filtration flask 7, while the solid remains on the filter paper 303, significantly improving separation efficiency and saving considerable time compared to ordinary gravity filtration. Furthermore, a rinsing assembly 5 is provided at the top of the storage funnel 4, facilitating the rinsing of the inner wall of the storage funnel 4. After each extraction experiment, the storage funnel 4 can be cleaned promptly using the rinsing assembly 5 to prevent residual sample or reagents from interfering with subsequent experiments, ensuring the accuracy of experimental results. Simultaneously, it reduces the difficulty and workload of manual cleaning, improving the convenience of the experiment.

[0021] like Figure 2-4As shown, a regulating valve 201 is provided at the lower part of the second connecting pipe 2, and a limiting flange 202 is provided in the middle of the outer wall of the second connecting pipe 2. A sealing ring 203 is provided at the upper part of the limiting flange 202. The regulating valve 201 can flexibly adjust the liquid flow rate through the second connecting pipe 2 according to the specific needs of the experiment. During the filtration experiment, different samples and experimental conditions require different flow rates. The presence of the regulating valve 2 allows the experimenter to precisely control this process, improving the controllability and success rate of the experiment.

[0022] like Figure 4 As shown, the lower part of the Buchner funnel 3 is a first extension tube 301, which extends into the inner cavity of the second connecting tube 2. The outer wall of the first extension tube 301 is provided with a first sleeve 302, which is sleeved on the outside of the second connecting tube 2. The lower end of the first sleeve 302 abuts against the limiting flange 202. The inner wall of the first sleeve 302 forms a sealing fit with the outer wall of the second connecting tube 2 through a sealing ring 203. Filter paper 303 is provided in the upper funnel cavity of the Buchner funnel 3.

[0023] The fitting of the limiting flange 202 in the middle of the outer wall of the second connecting tube 2, the sealing ring 203, and the first sleeve 302 on the Buchner funnel 3 forms a good sealing structure. The limiting flange 202 provides accurate positioning and support for the first sleeve 302, allowing the first sleeve 302 to be stably fitted onto the outside of the second connecting tube 2. The sealing ring 203 fills the gap between the inner wall of the first sleeve 302 and the outer wall of the second connecting tube 2, preventing liquid leakage from the connection point during filtration. The good sealing performance ensures that all liquid can pass through the Buchner funnel 3 for filtration, avoiding liquid waste and pollution of the experimental environment.

[0024] During the filtration process, a certain negative pressure environment needs to be created within the liquid channel to accelerate the filtration speed. If the seal between the Buchner funnel 3 and the second connecting pipe 2 is not tight, outside air will enter the system, disrupting the negative pressure environment and reducing filtration efficiency. The aforementioned sealing structure effectively prevents the entry of outside air, ensuring the stability of the negative pressure during filtration, thereby improving filtration efficiency and making the filtration process smoother.

[0025] like Figure 5 As shown, a sealing gasket 401 is provided between the lower end face of the liquid storage funnel 4 and the upper end face of the Buchner funnel 3. Similarly, when the liquid storage funnel 4 and the Buchner funnel 3 are clamped and fixed together by a fixing bracket, the sealing gasket 401 can ensure the sealing of the fit between the two, prevent the leakage of liquid in the flow channel, and ensure the stability of the negative pressure during the filtration process.

[0026] like Figure 5As shown, the rinsing assembly 5 includes: an upper cover, the lower surface of which is provided with a mating groove 501 for mating with the upper end of the side wall of the liquid storage funnel 4; and a spray pipe provided in the middle of the upper cover. The mating groove 501 allows the operator to easily place the rinsing assembly 5 above the liquid storage funnel 4. Preferably, the mating groove 501 is loosely fitted with the liquid storage funnel 4, facilitating the entry of external air into the liquid storage funnel 4 during filtration. Furthermore, the mating groove 501 also prevents leakage of rinsing liquid during spray rinsing, thus avoiding contamination of the experimental platform and surrounding environment.

[0027] like Figure 5 As shown, the nozzle includes a threaded tube 502 threadedly connected to the upper cover. A nozzle 503 is connected to the lower end of the threaded tube 502. An abutment flange 504 is provided on the upper part of the outer side wall of the threaded tube 502. A second connector 505 is provided at the upper end of the threaded tube 502, and the second connector 505 cooperates with the flushing liquid supply assembly 6 via a pipe. The threaded tube 502 and the upper cover are connected by a thread, which is simple and practical. During installation, the threaded tube 502 is simply screwed into the corresponding threaded hole of the upper cover for quick installation. When cleaning, replacing, or maintaining the nozzle is required, it can be easily disassembled by simply rotating the threaded tube 502 in the opposite direction. This greatly improves the maintainability of the device and saves operating time and effort. Furthermore, the abutment flange 504 improves the stability of the fit between the threaded tube 504 and the upper cover.

[0028] Preferably, the nozzles of the spray head 503 are evenly distributed around the circumference and are tilted downwards. This even distribution ensures that when the spray head 503 sprays the rinsing liquid, it forms a complete circular rinsing area on the cross-section of the storage funnel 4, thus avoiding rinsing dead zones. The downward tilt of the nozzles allows the rinsing liquid to flow more effectively down the inner wall of the storage funnel 4 under the combined action of gravity and jet force, more effectively removing residual impurities from the inner wall of the storage funnel 4.

[0029] The flushing liquid supply assembly 6 can be a conventional liquid storage tank and liquid supply pump assembly, which provides the corresponding flushing liquid to the flushing assembly 5 according to the experimental requirements. The specific structure will not be described in detail here.

[0030] like Figure 2-3 As shown, support blocks 103 are respectively provided at both ends of the outer side wall of the collection tube 1, and a lifting port 104 is provided at the upper part of the support block 103. The support block 103 facilitates the placement of the collection tube 1, and the lifting port 104 allows the operator to easily lift the collection tube 1.

[0031] like Figure 3As shown, the inner cavity of the collection tube 1 is provided with a flow guide block 105. The upper side wall of the flow guide block 105 is inclined to guide the solution to the first connecting tube 101. The flow guide block 105 can prevent solution residue in the collection tube 1.

[0032] like Figure 6 As shown, a second extension tube 803 is provided in the middle of the first connector 8. The second extension tube 803 is connected to the liquid inlet 801, and the lower end of the second extension tube 803 is set below the air extraction port 802. The second extension tube 803 can prevent liquid from being drawn back into the air extraction port 802 during the suction process.

[0033] In another specific implementation, such as Figure 3 As shown, the collection pipe 1 is equipped with multiple sets of filter components. When only some filter components are needed in actual operation, the regulating valve 201 at the bottom of the second connecting pipe 2 that is not needed can be closed. A protective cover can be installed on the Buchner funnel 3 to avoid contamination by external dust or other impurities.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. An extraction apparatus for chemical laboratory testing, characterized in that, include: A collection tube (1) is provided with a first connecting tube (101) at one end and a sealing head (102) at the other end. A plurality of second connecting tubes (2) are provided at the upper part of the collection tube (1). A Buchner funnel (3) is provided at the upper part of the second connecting tube (2). A liquid storage funnel (4) is provided at the upper part of the Buchner funnel (3). The liquid storage funnel (4) of the Buchner funnel (3) is clamped and fixed by a fixing clamp. A flushing assembly (5) for flushing the inner wall of the liquid storage funnel (4) is provided at the upper part of the liquid storage funnel (4). The liquid outlet of the first connecting pipe (101) is connected to the filtration flask (7) through a pipe. The upper part of the filtration flask (7) is provided with a first connector (8). The side wall of the first connector (8) is provided with a liquid inlet (801) and a vacuum port (802). The liquid inlet (801) is connected to the first connecting pipe (101), and the vacuum port (802) is connected to the vacuum pump (9).

2. The extraction apparatus for chemical laboratory testing according to claim 1, characterized in that, A regulating valve (201) is provided at the lower part of the second connecting pipe (2), a limiting flange (202) is provided at the middle part of the outer wall of the second connecting pipe (2), and a sealing ring (203) is provided at the upper part of the limiting flange (202).

3. The extraction apparatus for chemical laboratory testing according to claim 2, characterized in that, The lower part of the Buchner funnel (3) is a first extension tube (301), which extends into the inner cavity of the second connecting tube (2). The outer wall of the first extension tube (301) is provided with a first sleeve (302), which is sleeved on the outside of the second connecting tube (2). The lower end of the first sleeve (302) abuts against the limiting flange (202). The inner wall of the first sleeve (302) forms a sealing fit with the outer wall of the second connecting tube (2) through a sealing ring (203). Filter paper (303) is provided in the upper funnel cavity of the Buchner funnel (3).

4. The extraction apparatus for chemical laboratory testing according to claim 1, characterized in that, A sealing gasket (401) is provided between the lower end face of the liquid storage funnel (4) and the upper end face of the Buchner funnel (3).

5. An extraction apparatus for chemical laboratory testing according to claim 1, characterized in that, The rinsing assembly (5) includes: an upper cover, the lower surface of which is provided with a mating groove (501), the mating groove (501) being used to mate with the upper end of the side wall of the liquid storage funnel (4), and a spray pipe being provided in the middle of the upper cover.

6. An extraction apparatus for chemical laboratory testing according to claim 5, characterized in that, The nozzle includes: a threaded pipe (502) threadedly connected to the upper cover, a nozzle (503) connected to the lower end of the threaded pipe (502), an abutment flange (504) provided on the upper part of the outer side wall of the threaded pipe (502), and a second connector (505) provided at the upper end of the threaded pipe (502). The second connector (505) is connected to the flushing liquid supply assembly (6) through a pipe.

7. An extraction apparatus for chemical laboratory testing according to claim 1, characterized in that, The outer side wall of the collection tube (1) is provided with support blocks (103) at both ends, and the upper part of the support block (103) is provided with a lifting port (104).

8. An extraction apparatus for chemical laboratory testing according to claim 1, characterized in that, The inner cavity of the collection tube (1) is provided with a flow guide block (105), and the upper side wall of the flow guide block (105) is inclined to guide the solution to the first connecting tube (101).

9. An extraction apparatus for chemical laboratory testing according to claim 1, characterized in that, The first connector (8) is provided with a second extension tube (803) in the middle. The second extension tube (803) is connected to the liquid inlet (801). The lower end of the second extension tube (803) is set below the air extraction port (802).

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