Multi-stage filtration and extraction combined edible oil sample pretreatment device

The multi-stage filtration and extraction combined edible oil sample pretreatment device solves the problems of incomplete filtration and complicated operation in traditional devices, realizes efficient integration of multiple processes, improves filtration accuracy and mixing efficiency, and reduces the burden of manual cleaning.

CN224180436UActive Publication Date: 2026-05-01WUHAN POLYTECHNIC UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WUHAN POLYTECHNIC UNIVERSITY
Filing Date
2025-05-16
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Traditional edible oil sample pretreatment devices disperse the filtration, mixing, and extraction steps into multiple devices, resulting in complex operation, incomplete filtration, difficulty in effectively removing impurities of different types and sizes, and easy clogging of the filter screen.

Method used

Design a multi-stage filtration and extraction combined edible oil sample pretreatment device. It adopts a multi-layer filter screen and gear meshing method, and completes multiple processes in one device through the filtration mechanism and the mixing mechanism, including multi-stage filtration and preliminary extraction. The servo motor controls the rotating ring and stirring rod to operate synchronously, ensuring the cleanliness of the filter screen and the mixing efficiency.

Benefits of technology

It significantly shortens the processing cycle, improves overall processing efficiency, ensures filtration accuracy and mixing effect, reduces the burden of manual cleaning, and avoids reduced flow and efficiency due to clogging.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of edible oil processing, and discloses a multistage filtration and extraction combined type edible oil sample pretreatment device which comprises an upper tank shell, a filtration mechanism is arranged on the inner top surface of the upper tank shell, and the filtration mechanism comprises a first servo motor, a transmission cavity and a fixing frame; the output end of the first servo motor is fixedly connected with a first main gear, and the periphery of the inner top face of the transmission cavity is rotationally connected with a plurality of first auxiliary gears. According to the utility model, the plurality of rotating rings are arranged in the filtering mechanism, and the first servo motor can control the plurality of rotating rings to synchronously rotate in different directions under the meshing action of the gears, so that the brush can clean the filter screen on each placing frame, and the filtering mechanism is continuously kept clean in the filtering process; impurities are prevented from being accumulated, the filtering precision is effectively improved, the burden of manual cleaning is reduced, and flow reduction and efficiency reduction caused by blockage are avoided.
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Description

A multi-stage filtration and extraction combined edible oil sample pretreatment device Technical Field

[0001] This utility model relates to the field of edible oil processing technology, and in particular to a multi-stage filtration and extraction combined edible oil sample pretreatment device. Background Technology

[0002] Edible oil sample pretreatment is a key step in ensuring high-quality and accurate analytical results. This process aims to improve the sensitivity and accuracy of the analysis by removing impurities and contaminants from the oil sample, ensuring the safety of subsequent testing and use. Extraction is carried out by adding an appropriate solvent to extract the effective components from the oil sample.

[0003] However, traditional devices often separate the steps of filtration, mixing and extraction into multiple different devices. This separate processing method increases the complexity of operation and may lead to poor connection between the steps in the process. In addition, in traditional devices, the filtration process usually relies on a single type of filter, which can easily lead to incomplete filtration and failure to effectively remove impurities of different types and sizes. Over time, impurity particles can accumulate on the filter.

[0004] Therefore, those skilled in the art have provided a multi-stage filtration and extraction combined edible oil sample pretreatment device to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-stage filtration and extraction combined edible oil sample pretreatment device. This device is equipped with a filtration mechanism and a mixing mechanism. Under the action of filter screens of different materials on multiple racks, the incoming oil is filtered and intercepted in multiple layers, thereby reducing suspended solids, impurities and other contaminants in the oil. Furthermore, under the action of gear meshing, the main stirring rod and multiple auxiliary stirring rods simultaneously mix and stir, thereby generating multiple mixing zones, which improves the mixing efficiency of the oil and extraction solvent. As a result, the device has the ability to simultaneously perform filtration and preliminary extraction. The oil completes multiple processes in one device, which can significantly shorten the processing cycle and improve the overall processing efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-stage filtration and extraction combined edible oil sample pretreatment device includes an upper tank shell. A filtration mechanism is provided on the inner top surface of the upper tank shell. The filtration mechanism includes a first servo motor, a transmission cavity, and a fixed frame. A first main gear is fixedly connected to the output end of the first servo motor. Multiple first auxiliary gears are rotatably connected to the periphery of the inner top surface of the transmission cavity. A first rotating ring, a second rotating ring, and a third rotating ring are rotatably connected to the inner wall of the transmission cavity. A first placement frame is engaged with the lower surface of the first rotating ring, a second placement frame is engaged with the lower surface of the second rotating ring, and a third placement frame is engaged with the lower surface of the third rotating ring. Filter screens are fixedly connected to the inner walls of the first, second, and third placement frames. First brushes are fixedly connected to the front and rear ends of the outer walls of the first and second placement frames. Second brushes are fixedly connected to all four sides of the outer wall of the fixed frame.

[0008] The lower end of the upper tank shell is provided with a lower tank shell. The inner bottom surface of the lower tank shell is provided with a mixing mechanism. The mixing mechanism includes a connecting frame, a second auxiliary gear, an auxiliary stirring rod, and a positioning frame. A second servo motor is fixedly connected to the center of the upper surface of the connecting frame. The output end of the second servo motor is fixedly connected to a main stirring rod. A second main gear is fixedly connected to the lower end of the outer wall of the main stirring rod. A third auxiliary gear is fixedly connected to the lower end of the outer wall of the auxiliary stirring rod. Multiple stirring blades are fixedly connected to the upper ends of the outer walls of both the main stirring rod and the auxiliary stirring rod.

[0009] Through the above technical solution, the edible oil sample pretreatment device is equipped with multiple rotating rings in the filtration mechanism. Under the action of gear meshing, the first servo motor can control the multiple rotating rings to rotate synchronously in different directions, so that the brush can clean the filter screens on each placement rack. This allows the filtration mechanism to remain clean during the filtration process, prevents the accumulation of impurities, effectively improves the filtration accuracy, reduces the burden of manual cleaning, and avoids the reduction in flow and efficiency caused by clogging.

[0010] Furthermore, the first servo motor is fixedly connected to one side of the upper surface of the upper tank shell, the transmission cavity is opened inside the upper end of the upper tank shell, the upper end of the outer wall of the first rotating ring is fixedly connected to a first external gear, the upper end of the outer wall of the second rotating ring is fixedly connected to a second external gear, the upper end of the inner wall of the second rotating ring is fixedly connected to a first internal gear, and the upper end of the inner wall of the third rotating ring is fixedly connected to a second internal gear.

[0011] Through the above technical solution, the first servo motor can control multiple rotating rings to rotate synchronously in different directions through gear meshing.

[0012] Furthermore, the fixing frame is fixedly connected to the middle of the inner top surface of the upper tank shell, and mounting blocks are fixedly connected to the lower surfaces of the first rotating ring, the second rotating ring and the third rotating ring. Mounting slots are opened around the upper surfaces of the first placement frame, the second placement frame and the third placement frame.

[0013] Through the above technical solution, the first placement frame, the second placement frame, and the third placement frame can be bolted to the first rotating ring, the second rotating ring, and the third rotating ring respectively by the corresponding engagement between the mounting block and the mounting slot.

[0014] Furthermore, the connecting frame is fixedly connected to the lower end of the lower tank shell, the auxiliary stirring rods are rotatably connected to the periphery of the inner bottom surface of the lower tank shell, the positioning frame is fixedly connected to the upper end of the inner wall of the lower tank shell, and the main stirring rod is rotatably connected to the lower tank shell.

[0015] The above technical solution enables the main stirring rod and the auxiliary stirring rod to rotate within the lower tank shell, and the connecting frame enhances the stability of the main stirring rod and the auxiliary stirring rod during rotation.

[0016] Furthermore, the second auxiliary gear is rotatably connected to the periphery of the lower surface of the lower tank shell, the second main gear meshes with the second auxiliary gear, and the second auxiliary gear meshes with the third auxiliary gear;

[0017] The above technical solution enables the second main gear to control multiple second auxiliary gears and the third auxiliary gear to rotate synchronously.

[0018] Furthermore, a feed pipe is fixedly connected to the center of the upper surface of the upper tank shell, a connecting pipe is fixedly connected to the upper end of one side of the outer wall of the lower tank shell, and a discharge pipe is fixedly connected to the lower end of the other side of the outer wall of the lower tank shell.

[0019] The above technical solution allows oil to enter the device by setting a feed pipe, allows extraction solvent to enter the device by setting a connecting pipe, and allows the oil that has completed preliminary extraction and filtration to be discharged from the device by setting a discharge pipe.

[0020] Furthermore, a first control module is fixedly connected to the middle of the front end of the upper tank shell outer wall, a control panel is fixedly connected to the lower part of the front end of the upper tank shell outer wall, and a second control module is fixedly connected to the front end of the lower tank shell outer wall.

[0021] The above technical solution enables users to operate the device by setting up a first control module, a second control module, and a control panel.

[0022] Furthermore, a first fixing plate is fixedly connected to the lower end of the outer wall of the upper tank shell, and a second fixing plate is fixedly connected to the upper end of the outer wall of the lower tank shell.

[0023] The above technical solution enables the upper tank shell to be bolted to the lower tank shell by setting a first fixing plate and a second fixing plate.

[0024] This utility model has the following beneficial effects:

[0025] 1. This utility model proposes a multi-stage filtration and extraction combined edible oil sample pretreatment device. Compared with most traditional edible oil sample pretreatment devices, this device is equipped with a filtration mechanism and a mixing mechanism. Under the action of filter screens of different materials on multiple racks, the incoming oil is filtered and intercepted in multiple layers, thereby reducing suspended solids, impurities and other pollutants in the oil. Under the action of gear meshing, the main stirring rod and multiple auxiliary stirring rods mix and stir synchronously, thereby generating multiple mixing zones, which improves the mixing efficiency of oil and extraction solvent. Thus, the device has the ability to filter and perform preliminary extraction in a single device. The oil completes multiple processes in one device, which can significantly shorten the processing cycle and improve the overall processing efficiency.

[0026] 2. The present invention proposes a multi-stage filtration and extraction combined edible oil sample pretreatment device. Compared with most traditional edible oil sample pretreatment devices, this edible oil sample pretreatment device has multiple rotating rings in the filtration mechanism. Under the action of gear meshing, the first servo motor can control the multiple rotating rings to rotate synchronously in different directions, so that the brush can clean the filter screens on each placement rack. This keeps the filtration mechanism clean during the filtration process, prevents the accumulation of impurities, effectively improves the filtration accuracy, reduces the burden of manual cleaning, and avoids the reduction in flow and efficiency caused by clogging. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the structure of a multi-stage filtration and extraction combined edible oil sample pretreatment device proposed in this utility model.

[0028] Figure 2 is a schematic diagram of the upper tank shell structure of a multi-stage filtration and extraction combined edible oil sample pretreatment device proposed in this utility model.

[0029] Figure 3 is a schematic diagram of the filtration mechanism of a multi-stage filtration and extraction combined edible oil sample pretreatment device proposed in this utility model.

[0030] Figure 4 is a schematic diagram of the mixing mechanism of a multi-stage filtration and extraction combined edible oil sample pretreatment device proposed in this utility model.

[0031] Figure 5 is a schematic diagram of the main stirring rod structure of a multi-stage filtration and extraction combined edible oil sample pretreatment device proposed in this utility model.

[0032] Legend:

[0033] 1. Upper tank shell;

[0034] 2. Filtering mechanism; 201. First servo motor; 202. First main gear; 203. Transmission cavity; 204. First auxiliary gear; 205. First rotating ring; 206. Second rotating ring; 207. Third rotating ring; 208. First external gear; 209. Second external gear; 2010. First internal gear; 2011. Second internal gear; 2012. Mounting block; 2013. First placement frame; 2014. Second placement frame; 2015. Third placement frame; 2016. Mounting slot; 2017. Filter screen; 2018. First brush; 2019. Fixing frame; 2020. Second brush;

[0035] 3. Lower tank shell;

[0036] 4. Mixing mechanism; 401. Connecting frame; 402. Second servo motor; 403. Main stirring rod; 404. Second main gear; 405. Second auxiliary gear; 406. Auxiliary stirring rod; 407. Third auxiliary gear; 408. Stirring blade; 409. Positioning frame;

[0037] 5. Feed pipe; 6. First control module; 7. Control panel; 8. First fixed plate; 9. Second fixed plate; 10. Second control module; 11. Discharge pipe; 12. Connecting pipe. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0039] One embodiment provided by this utility model:

[0040] Referring to Figures 1, 2, and 4, a multi-stage filtration and extraction combined edible oil sample pretreatment device includes an upper tank shell 1. A filtration mechanism 2 is disposed on the inner top surface of the upper tank shell 1. The filtration mechanism 2 includes a first servo motor 201, a transmission cavity 203, and a fixing frame 2019. A first main gear 202 is fixedly connected to the output end of the first servo motor 201. Multiple first auxiliary gears 204 are rotatably connected to the periphery of the inner top surface of the transmission cavity 203. A first rotating ring 205, a second rotating ring 206, and a third rotating ring 207 are rotatably connected to the inner wall of the transmission cavity 203. The lower surface of the rotating ring 205 is fitted with a first placement frame 2013, the lower surface of the second rotating ring 206 is fitted with a second placement frame 2014, and the lower surface of the third rotating ring 207 is fitted with a third placement frame 2015. The inner walls of the first placement frame 2013, the second placement frame 2014, and the third placement frame 2015 are all fixedly connected with a filter screen 2017. The front and rear ends of the outer walls of the first placement frame 2013 and the second placement frame 2014 are all fixedly connected with a first brush 2018. The outer walls of the fixed frame 2019 are all fixedly connected with a second brush 2020.

[0041] A lower tank shell 3 is provided at the lower end of the upper tank shell 1. A mixing mechanism 4 is provided on the inner bottom surface of the lower tank shell 3. The mixing mechanism 4 includes a connecting frame 401, a second auxiliary gear 405, an auxiliary stirring rod 406, and a positioning frame 409. A second servo motor 402 is fixedly connected to the center of the upper surface of the connecting frame 401. A main stirring rod 403 is fixedly connected to the output end of the second servo motor 402. A second main gear 404 is fixedly connected to the lower end of the outer wall of the main stirring rod 403. A third auxiliary gear 407 is fixedly connected to the lower end of the outer wall of the auxiliary stirring rod 406. The main stirring rod 403 and the auxiliary gear 409 are connected to the main stirring rod 401. Multiple stirring blades 408 are fixedly connected to the upper end of the outer wall of the stirring rod 406. The edible oil sample pretreatment device has multiple rotating rings in the filtration mechanism 2. Under the action of gear meshing, the first servo motor 201 can control the multiple rotating rings to rotate synchronously in different directions, so that the brush can clean the filter screens 2017 on each shelf. This keeps the filtration mechanism 2 clean during the filtration process, prevents the accumulation of impurities, effectively improves the filtration accuracy, reduces the burden of manual cleaning, and avoids the reduction in flow and efficiency caused by clogging.

[0042] Referring to Figures 1, 2, and 3, the first servo motor 201 is fixedly connected to one side of the upper surface of the upper tank shell 1. The transmission cavity 203 is opened inside the upper end of the upper tank shell 1. The upper end of the outer wall of the first rotating ring 205 is fixedly connected to the first external gear 208, the upper end of the outer wall of the second rotating ring 206 is fixedly connected to the second external gear 209, the upper end of the inner wall of the second rotating ring 206 is fixedly connected to the first internal gear 2010, and the upper end of the inner wall of the third rotating ring 207 is fixedly connected to the second internal gear 2011. This allows the first servo motor 201 to control the multiple rotating rings to rotate synchronously in different directions through gear meshing. The fixing frame 20... 19 is fixedly connected to the middle of the inner top surface of the upper tank shell 1. Mounting blocks 2012 are fixedly connected to the lower surfaces of the first rotating ring 205, the second rotating ring 206 and the third rotating ring 207. Mounting slots 2016 are opened around the upper surfaces of the first placement frame 2013, the second placement frame 2014 and the third placement frame 2015. The corresponding engagement between the mounting blocks 2012 and the mounting slots 2016 allows the first placement frame 2013, the second placement frame 2014 and the third placement frame 2015 to be bolted to the first rotating ring 205, the second rotating ring 206 and the third rotating ring 207 respectively.

[0043] Referring to Figures 1, 4, and 5, the connecting frame 401 is fixedly connected to the lower end of the lower tank shell 3. The auxiliary stirring rods 406 are rotatably connected to the periphery of the inner bottom surface of the lower tank shell 3. The positioning frame 409 is fixedly connected to the upper end of the inner wall of the lower tank shell 3. The main stirring rod 403 is rotatably connected to the lower tank shell 3, so that the main stirring rod 403 and the auxiliary stirring rod 406 can rotate inside the lower tank shell 3. The connecting frame 401 improves the stability of the main stirring rod 403 and the auxiliary stirring rod 406 during rotation. The second auxiliary gear 405 is rotatably connected to the periphery of the middle part of the lower surface of the lower tank shell 3. The second main gear 404 meshes with the second auxiliary gear 405, and the second auxiliary gear 405 meshes with the third auxiliary gear 407, so that the second main gear 404 can control the multiple second auxiliary gears 405 and the third auxiliary gear 407 to rotate synchronously.

[0044] Referring to Figures 1, 2, and 4, a feed pipe 5 is fixedly connected to the center of the upper surface of the upper tank shell 1. A connecting pipe 12 is fixedly connected to the upper end of one side of the outer wall of the lower tank shell 3, and a discharge pipe 11 is fixedly connected to the lower end of the other side of the outer wall of the lower tank shell 3. The feed pipe 5 allows oil to enter the device, the connecting pipe 12 allows the extraction solvent to enter the device, and the discharge pipe 11 allows the oil that has undergone preliminary extraction and filtration to be discharged from the device. A first control module is fixedly connected to the middle of the front end of the outer wall of the upper tank shell 1. 6. A control panel 7 is fixedly connected to the lower part of the front end of the outer wall of the upper tank shell 1, and a second control module 10 is fixedly connected to the front end of the outer wall of the lower tank shell 3. By setting the first control module 6, the second control module 10 and the control panel 7, the user can operate the device. A first fixing plate 8 is fixedly connected to the lower end of the outer wall of the upper tank shell 1, and a second fixing plate 9 is fixedly connected to the upper end of the outer wall of the lower tank shell 3. By setting the first fixing plate 8 and the second fixing plate 9, the upper tank shell 1 and the lower tank shell 3 can be bolted together.

[0045] Working principle: First, oil is injected into the upper tank shell 1 through the feed pipe 5, and then passes through the filter screens 2017 on the first placement frame 2013 (iron material), the second placement frame 2014 (microporous filter membrane), and the third placement frame 2015 (nanomaterial) in sequence before entering the lower tank shell 3. Simultaneously, the first servo motor 201 starts, and under the action of gear meshing, multiple rotating rings rotate synchronously in different directions, causing multiple placement frames to rotate synchronously in different directions as well. This allows the second brush 2020 to clean the filter screen 2017 on the first placement frame 2013. The first brush 2018 cleans the filter screen 2017 on the second placement rack 2014, and the first brush 2018 on the second placement rack 2014 cleans the filter screen 2017 on the third placement rack 2015 to avoid the possibility of impurity particles accumulating on the filter screen 2017. The oil entering the lower tank shell 3 is mixed and stirred by the stirring blades 408. The stirring blades 408 on the main stirring rod 403 and the auxiliary stirring rod 406 are synchronously controlled to rotate by the second servo motor 402 under the action of gear meshing. At the same time, the extraction solvent is injected into the lower tank shell 3 through the connecting pipe 12 to perform preliminary extraction of the oil.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage filtration and extraction combined edible oil sample pretreatment device, comprising an upper tank shell, characterized in that: A filtration mechanism is provided on the inner top surface of the upper tank shell. The filtration mechanism includes a first servo motor, a transmission cavity, and a fixing frame. A first main gear is fixedly connected to the output end of the first servo motor. Multiple first auxiliary gears are rotatably connected to the periphery of the inner top surface of the transmission cavity. A first rotating ring, a second rotating ring, and a third rotating ring are rotatably connected to the inner wall of the transmission cavity. A first placement frame is engaged with the lower surface of the first rotating ring, a second placement frame is engaged with the lower surface of the second rotating ring, and a third placement frame is engaged with the lower surface of the third rotating ring. Filter screens are fixedly connected to the inner walls of the first, second, and third placement frames. The front and rear ends of the outer wall of the two placement racks are fixedly connected to a first brush, and the four sides of the outer wall of the fixed rack are fixedly connected to a second brush. The lower end of the upper tank shell is provided with a lower tank shell, and the inner bottom surface of the lower tank shell is provided with a mixing mechanism. The mixing mechanism includes a connecting frame, a second auxiliary gear, an auxiliary stirring rod, and a positioning frame. A second servo motor is fixedly connected to the center of the upper surface of the connecting frame. The output end of the second servo motor is fixedly connected to a main stirring rod. The lower end of the outer wall of the main stirring rod is fixedly connected to a second main gear. The lower end of the outer wall of the auxiliary stirring rod is fixedly connected to a third auxiliary gear. The upper ends of the outer walls of the main stirring rod and the auxiliary stirring rod are both fixedly connected to multiple stirring blades.

2. The multi-stage filtration and extraction combined edible oil sample pretreatment device according to claim 1, characterized in that: The first servo motor is fixedly connected to one side of the upper surface of the upper tank shell. The transmission cavity is opened inside the upper end of the upper tank shell. The upper end of the outer wall of the first rotating ring is fixedly connected to the first external gear. The upper end of the outer wall of the second rotating ring is fixedly connected to the second external gear. The upper end of the inner wall of the second rotating ring is fixedly connected to the first internal gear. The upper end of the inner wall of the third rotating ring is fixedly connected to the second internal gear.

3. The multi-stage filtration and extraction combined edible oil sample pretreatment device according to claim 1, characterized in that: The fixing frame is fixedly connected to the middle of the inner top surface of the upper tank shell. The lower surfaces of the first rotating ring, the second rotating ring and the third rotating ring are all fixedly connected with mounting blocks. The upper surfaces of the first placement frame, the second placement frame and the third placement frame are all provided with mounting slots.

4. The multi-stage filtration and extraction combined edible oil sample pretreatment device according to claim 1, characterized in that: The connecting frame is fixedly connected to the lower end of the lower tank shell, the auxiliary stirring rods are rotatably connected to the periphery of the inner bottom surface of the lower tank shell, the positioning frame is fixedly connected to the upper end of the inner wall of the lower tank shell, and the main stirring rod is rotatably connected to the lower tank shell.

5. The multi-stage filtration and extraction combined edible oil sample pretreatment device according to claim 1, characterized in that: The second auxiliary gear is rotatably connected to the periphery of the lower surface of the lower tank shell. The second main gear meshes with the second auxiliary gear, and the second auxiliary gear meshes with the third auxiliary gear.

6. The multi-stage filtration and extraction combined edible oil sample pretreatment device according to claim 1, characterized in that: A feed pipe is fixedly connected to the center of the upper surface of the upper tank shell, a connecting pipe is fixedly connected to the upper end of one side of the outer wall of the lower tank shell, and a discharge pipe is fixedly connected to the lower end of the other side of the outer wall of the lower tank shell.

7. The multi-stage filtration and extraction combined edible oil sample pretreatment device according to claim 1, characterized in that: A first control module is fixedly connected to the middle of the front end of the upper tank shell outer wall, a control panel is fixedly connected to the lower part of the front end of the upper tank shell outer wall, and a second control module is fixedly connected to the front end of the lower tank shell outer wall.

8. The multi-stage filtration and extraction combined edible oil sample pretreatment device according to claim 1, characterized in that: A first fixing plate is fixedly connected to the lower end of the outer wall of the upper tank shell, and a second fixing plate is fixedly connected to the upper end of the outer wall of the lower tank shell.