Multi-position linkage type laboratory suction filtration device

Abstract

The utility model discloses a multi-position linkage type laboratory suction filtration device which comprises a fixed frame and a disc clamp, four liquid collecting bottles are arranged on the fixed frame, a fixed column is arranged at the center of the fixed frame, an exhaust pipe is arranged on the fixed column, and the exhaust pipe is connected with a vacuum pump; the disc clamp comprises an upper disc clamp and a lower disc clamp, four filter cups are arranged in the upper disc clamp, four filter heads are arranged in the lower disc clamp, the bottoms of the four filter cups are connected with the tops of the four filter heads, and the bottoms of the four filter heads are connected with the liquid collection bottle; the liquid collecting bottle is connected with the exhaust pipe. Four independent suction filtration devices are communicated through a vacuum pump and an exhaust pipe, so that simultaneous work is realized, and the suction filtration speed is obviously increased; the movable clamp can be switched between the upper exhaust pipe and the lower exhaust pipe, so that the suction filtration and the disassembly flow are seamlessly connected, and the single operation time is shortened; according to the suction filtration device, the traditional decentralized operation is integrated into a coherent process through the design of parallel multiple instruments, rapid paper replacement, air exchange linkage and the like, so that the time consumption of a single experiment is remarkably reduced, and the suction filtration device is suitable for high-throughput or repeated suction filtration requirements.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum filtration equipment, specifically relating to a multi-position linkage laboratory vacuum filtration device. Background Technology

[0002] Vacuum filtration is a common separation technique widely used in chemistry, pharmaceuticals, and environmental protection. The principle of vacuum filtration is to apply negative pressure (or vacuuming) to force liquid through a solid filter medium, thus achieving solid-liquid separation. Its basic principle is to utilize the gas pressure difference, using a filter membrane or filter cloth to block solid particles while allowing the liquid to pass through, thereby completing the separation of solids and liquids. In traditional vacuum filtration, a vacuum filtration device (such as a vacuum flask or vacuum filter) is usually used in conjunction with a vacuum source (such as a water ring vacuum pump or air pump). The liquid enters the vacuum filtration device from the top or side. When passing through the filter medium, solid particles are trapped by the filter media, and the filtered clear liquid is discharged through the drain port, while the filter residue is trapped by the filter media and can be further processed.

[0003] However, traditional vacuum filtration devices have some problems in use, such as: during the process of changing the filter membrane in vacuum filtration, the filter membrane often cannot be placed directly opposite the sand core in one go; when placing the clamps, i.e., when using the clamps to fix the filter cup, filter membrane, and filter head, the filter cup is often not easy to align, or moving the filter cup to align it may cause the filter membrane to shift; when cleaning the instrument after filtration, the connection between the filter head and the collection bottle is not easy to separate due to the vacuum, and if it is pulled off forcefully, it may damage the instrument. These problems affect the effectiveness and adaptability of the vacuum filtration device to some extent. Utility Model Content

[0004] The purpose of this invention is to provide a multi-position linkage laboratory filtration device to improve the efficiency of filter membrane replacement and the quick disassembly of the device.

[0005] The technical solution adopted by this utility model is a multi-position linkage laboratory filtration device, including a fixed frame and a disc clamp. Four collection bottles are arranged on the fixed frame, and a fixed column is arranged at the center of the fixed frame. A suction pipe is arranged on the fixed column and connected to a vacuum pump. The disc clamp includes an upper disc clamp and a lower disc clamp. Four filter cups are arranged in the upper disc clamp, and four filter heads are arranged in the lower disc clamp. The bottom of the four filter cups is connected to the top of the four filter heads, and the four filter heads are connected to the collection bottles. The collection bottles are connected to the suction pipe.

[0006] The feature of this utility model is that,

[0007] The extraction pipe includes an upper extraction pipe and a lower extraction pipe; the lower extraction pipe is fixed on the fixed column, and the top of the lower extraction pipe is connected to the bottom of the upper extraction pipe, but the connection between the upper and lower extraction pipes is not connected; the upper part of the lower extraction pipe has four exhaust holes along the circumference, and the lower part of the upper extraction pipe has four exhaust holes along the circumference; a movable clamp is also fitted between the upper part of the lower extraction pipe and the bottom of the upper extraction pipe, and four air inlets are provided in the middle of the movable clamp along the circumference; the four exhaust holes of the upper and lower extraction pipes can be connected to the first rubber hose through the four air inlets on the movable clamp, and the first rubber hose is connected to four filter heads; a pull piston is also provided at the lower part of the lower extraction pipe.

[0008] The upper part of the upper suction pipe is connected to the fixed frame via a support rod, and the top of the upper suction pipe is connected to the vacuum pump via a second rubber hose; a load-bearing block is also fitted on the lower part of the upper suction pipe, and a liquid container is installed on the load-bearing block; a drain pipe is connected to one side of the liquid container, and the drain pipe is connected to the wastewater tank.

[0009] The upper disc clamp has a cleaning tank, four paper trays, and four working trays arranged sequentially from the center outwards. Filter cups are placed in the working trays, with the tops of the filter cups extending out of the upper disc clamp. A cleaning cylinder is located at the center of the lower disc clamp, and the cleaning tank and the cleaning cylinder correspond to and are connected. The bottom of the cleaning cylinder is connected to the liquid container. The upper suction pipe passes through the cleaning tank, the cleaning cylinder, the upper and lower disc clamps, the liquid container, and the load-bearing block. The lower disc clamp has four working cylinders arranged circumferentially, with filter heads placed inside. The filter heads extend out of the lower disc clamp, and the bottoms of the filter heads are connected to the liquid collection bottle.

[0010] A connecting shaft is fitted on the outer wall of the upper suction pipe, and the connecting shaft is located between the cleaning cylinder and the cleaning tank. Four sets of sliding rails are connected to the outside of the connecting shaft. A membrane transporter is slidably connected between every two sliding rails. The upper surface of the membrane transporter is provided with a slot, in which a rubber ring is embedded. A filter membrane is placed on the surface of the rubber ring. A push-pull rod is provided on the side of the membrane transporter away from the connecting shaft. Four lower cover slots are also provided on the outer wall of the lower disc clamp along the circumference. The push-pull rod extends out of the outer wall of the lower disc clamp through the lower cover slots.

[0011] The cleaning tank is equipped with a ring frame, the inner wall of which is in close contact with the outer wall of the suction pipe, and the outer side of the ring frame is connected to the inner wall of the cleaning tank via a connecting rod.

[0012] The upper disc clamp has internal threads on its inner wall, and the lower disc clamp has external threads on its inner wall. The upper and lower disc clamps are connected by threads.

[0013] The beneficial effects of this invention are: by using a vacuum pump and a suction pipe to connect four independent filtration devices to work simultaneously, the filtration speed is accelerated, and experimental time is saved. The working groove of the upper disc clamp is equipped with a limiting groove, making the placement of the filter cup and filter head more secure and disassembly more convenient. Tightening the disc clamp ensures precise alignment of the filter cup and filter head after fixation. The internal push-pull rod of the disc clamp moves the membrane transporter along the sliding track. When the membrane transporter is between the cleaning tank and the cleaning cylinder, an external water pipe can be placed in the cleaning tank to rinse it. Then, pulling the push-pull rod moves the membrane transporter into the corresponding position of the paper feeding trough. The wet membrane transporter allows the filter membrane to adhere firmly to it. The size of the paper feeding trough matches the size of the filter membrane, ensuring the membrane falls precisely onto the rubber ring of the membrane transporter after being placed in the trough, and preventing the membrane from being affected during the transporter's movement. This saves time when replacing the filter membrane, making the entire replacement process faster and more convenient. After the paper is loaded, pull the membrane transporter to move it between the working slot and the working cylinder of the upper and lower covers of the disc clamp. Tighten the disc clamp to ensure a tight fit and fixation between the filter cup, filter membrane, and filter head. At this point, the connection of the filtration device is sealed, and filtration can begin. The linkage of the above-mentioned transport system simplifies the entire filtration process, saving time when replacing the filter membrane without affecting filtration. For the movable clamp, when it is in the upper suction pipe, the device is in the filtration state, and the lower suction pipe is filled with air. After filtration is completed, the movable clamp is moved down, pushing the piston to allow air to enter between the filter head and the collection bottle, allowing for disassembly. The movable clamp, by moving between the non-connected upper and lower suction pipes, makes the filtration process and instrument disassembly seamless, saving the overall filtration time per cycle and improving filtration efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the multi-position linkage laboratory filtration device of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the disc clamp cover of the multi-position linkage laboratory filtration device of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the lower cover of the disc clamp of the multi-position linkage laboratory filtration device of this utility model;

[0017] Figure 4 This is a schematic diagram of the filter membrane replacement process of the disc clamp of the multi-position linkage laboratory filtration device of this utility model;

[0018] Figure 5 This is a cross-sectional schematic diagram of the working groove and working cylinder of the disc clamp of the multi-position linkage laboratory filtration device of this utility model;

[0019] Figure 6 This is a schematic diagram of the upper and lower suction pipes in the multi-position linkage laboratory filtration device of this utility model.

[0020] In the diagram: 1. Suction pipe, 101. Upper suction pipe, 102. Lower suction pipe, 2. Support rod, 3. Fixing frame, 4. Disc clamp, 401. Cleaning tank, 402. Paper feeding tank, 403. Working tank, 404. Annular slot, 405. Film feeder, 406. Sliding track, 407. Connecting shaft, 408. Push-pull rod, 409. Filter membrane, 410. Rubber ring, 411. Ring frame, 412. Connecting rod, 4 13. Lower cover slot, 414. Cleaning cylinder, 415. Working cylinder, 416. Upper disc clamp, 417. Lower disc clamp, 5. Filter cup, 6. Filter head, 7. Collection bottle, 8. Liquid container, 801. Drain hole, 9. Support block, 10. Moving clamp, 11. Pull piston, 12. Fixed column, 13. First rubber hose, 14. Drain pipe, 15. Waste liquid pool, 16. Vacuum pump, 17. Second rubber hose. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] This utility model relates to a multi-position linkage laboratory filtration device, such as... Figure 1 As shown, it includes a fixed frame 3 and a suction pipe 1. Four liquid collection bottles 7 are provided on the fixed frame 3, and the four liquid collection bottles 7 are arranged in a rectangular shape. The suction pipe 1 includes an upper suction pipe 101 and a lower suction pipe 102.

[0024] A fixed post 12 is provided at the center of the fixed frame 3. A lower suction pipe 102 is fixed on the fixed post 12. The top of the lower suction pipe 102 is connected to the bottom of the upper suction pipe 101. The connection between the upper suction pipe 101 and the lower suction pipe 102 is not connected. Four exhaust holes are provided circumferentially on the upper part of the lower suction pipe 102 and four exhaust holes are provided circumferentially on the lower part of the upper suction pipe 101. A pull piston 11 is also provided at the lower part of the lower suction pipe 102.

[0025] A movable clamp 10 is also fitted between the upper part of the lower suction pipe 102 and the bottom of the upper suction pipe 101, such as... Figure 6 As shown, the movable clamp 10 has four air inlets along the circumferential direction in the middle; the four exhaust holes of the upper suction pipe 101 and the lower suction pipe 102 are connected to the first rubber hose 13 through the four air inlets on the movable clamp 10, and the first rubber hose 13 is connected to the four filter heads 6; the movable clamp 10 can slide between the upper suction pipe 101 and the lower suction pipe 102; when the movable clamp 10 is in the position of the four exhaust holes corresponding to the upper suction pipe 101, the entire instrument is in the filtration state, and when it is in the position corresponding to the lower suction pipe 102, the filtration ends, and the filter head 6 and the collection bottle 7 can be detached;

[0026] The upper suction pipe 101 is also fitted with a load-bearing block 9 at the bottom, and a liquid container 8 is installed on the load-bearing block 9. The upper suction pipe 101 passes through the load-bearing block 9 and the liquid container 8. The liquid container 8 is connected to the waste liquid tank 15 through the drain pipe 14. The upper part of the upper suction pipe 101 is connected to the fixed frame 3 through the support rod 2. The support rod 2 is used to support the upper suction pipe 101. The top of the upper suction pipe 101 is connected to the vacuum pump 16 through the second rubber hose 17.

[0027] Example 2

[0028] Furthermore, it also includes a disc clamp 4, which comprises an upper disc clamp 416 and a lower disc clamp 417, such as... Figure 2 and Figure 3 As shown, the upper disc clamp 416 has internal threads on its inner wall, and the lower disc clamp 417 has external threads on its inner wall. The upper disc clamp 416 and the lower disc clamp 417 are connected by threads; the lower disc clamp 417 is hollow inside.

[0029] Example 3

[0030] Furthermore, the upper disc clamp 416 is provided with a cleaning tank 401, four paper feeding tanks 402 and four working tanks 403 arranged sequentially from the center outwards; the paper feeding tanks 402 and the working tanks 403 are arranged circumferentially and in a rectangular pattern; the cleaning tank 401 is located at the center of the four paper feeding tanks 402.

[0031] The working groove 403 contains a filter cup 5, which serves to limit the movement of the filter cup 5. The bottom center of the working groove 403 is hollowed out, as is the bottom of the filter cup 5; the unhollowed-out portion is used to restrict the filter cup 5. An upper circular clamp 416 extends from the top of the filter cup 5, and the filter cup 5 contacts the bottom of the working groove 403. Figure 5 As shown, the bottom outer side of the working groove 403 is provided with an annular groove 404, which can be engaged with the groove wall on the surface of the film conveyor 405; the working cylinder 415 inside the lower disc clamp 417 has the same internal structure as the working groove 403 and is symmetrically positioned.

[0032] A ring frame 411 is provided in the cleaning tank 401. The inner wall of the ring frame 411 is closely attached to the outer wall of the upper air extraction pipe 101, and the outer side of the ring frame 411 is connected to the inner wall of the cleaning tank 401 through a connecting rod 412.

[0033] A cleaning cylinder 414 is provided at the center of the lower disc clamp 417. The cleaning tank 401 corresponds to and is connected to the cleaning cylinder 414. The bottom of the cleaning cylinder 414 is flush with the bottom of the lower disc clamp 417 and is connected to the liquid container 8. The liquid container 8 has a drain hole 801 at the top and a drain pipe 14 connected to its side. The drain pipe 14 is placed in the wastewater tank 15. The upper air extraction pipe 101 passes through the cleaning tank 401, the cleaning cylinder 414, the lower disc clamp 417, the liquid container 8, and the load-bearing block 9.

[0034] The lower disc clamp 417 has four working cylinders 415 arranged circumferentially. The internal structure of the working cylinder 415 is opposite to that of the working groove 403. The filter head 6 is placed inside the working cylinder 415. The top of the working cylinder 415 is hollowed out, and the unhollowed part can restrict the filter head 6 from extending out of the lower disc clamp 417. The top center of the filter head 6 is provided with a sand core, and the lower side wall is provided with an air nozzle, which can be connected to the first rubber hose 13. The upper part of the filter head 6 is in contact with the top of the working cylinder 415, and the bottom of the filter head 6 is connected to the collection bottle 7. The outer wall of the lower disc clamp 417 is also provided with four lower cover slots 413 circumferentially.

[0035] A connecting shaft 407 is sleeved on the outer wall of the upper suction pipe 101, and the connecting shaft 407 is located between the cleaning cylinder 414 and the cleaning tank 401; for example Figure 4 As shown, four sets of sliding rails 406 are connected to the outer side of the connecting shaft 407, and the inner side of the sliding rails 406 is in close contact with the upper suction pipe 101. A film conveyor 405 is slidably connected between every two sliding rails 406. The center of the upper and lower surfaces of the film conveyor 405 is provided with a slot. A rubber ring 410 is embedded in the slot on the upper surface of the film conveyor 405. A filter membrane 409 is placed on the surface of the rubber ring 410. A push-pull rod 408 is provided on the side of the film conveyor 405 away from the connecting shaft 407. The push-pull rod 408 extends out of the outer wall of the lower disc clamp through the lower cover slot 413. The push-pull rod 408 is used to push the film conveyor 405 to slide on the sliding rails 406.

[0036] Example 4

[0037] The functions of the main components in this multi-position linkage laboratory filtration device are as follows:

[0038] A: The suction pipe 1 is connected to the vacuum pump 16 and the filter head 6 through the first rubber hose 13, the second rubber hose 17, and the movable clamp 10 to perform suction.

[0039] B: Support rod 2 and fixing frame 3 are used to fix the entire device;

[0040] C: The disc clamp 4 is used to fix the filter cup 5 and the filter head 6, while simplifying the process of replacing the filter membrane;

[0041] D: Filter cup 5 is used to hold the liquid that needs to be filtered;

[0042] E: Filter head 6 is connected to filter cup 5. When the filter head 6 is under vacuum, filtration begins.

[0043] F: Collection bottle 7 is used to hold the filtrate;

[0044] G: Liquid container 8 is used to collect wastewater after cleaning;

[0045] H: The load-bearing block 9 is used to support the weight of the disc clamp 4 and the liquid container 8;

[0046] I: The movable clamp 10 is used to switch the filtration state of the device. After moving upward, the device performs filtration. After moving downward, the filtration ends. It is linked with the pull piston 11 to facilitate the disassembly of the filter head 6 and the collection bottle 7.

[0047] J: Pulling piston 11 is used to control the air in the lower suction pipe 102;

[0048] K: The fixed column 12 is connected to the air extraction pipe 1 and the fixed frame 3, and is used to fix the air extraction pipe 1;

[0049] L: The first rubber hose 13 and the second rubber hose 17 are used to connect various components for air extraction and exhaust;

[0050] M: Drain pipe 14 is used to discharge the waste liquid in the liquid container 8 into the waste liquid pool 15;

[0051] N: Vacuum pump 16 expels air from the device, putting the device into filtration mode.

[0052] Example 5

[0053] The working principle of this multi-position linkage laboratory filtration device is as follows:

[0054] First, place the washed filter cup 5 and filter head 6 into the working tank 403 and working cylinder 415 respectively. After placing them into the bottom limiting groove, the filter cup 5 and filter head 6 can be fixed. At this time, the disc clamp 4 is not tightened. Then, connect the filter head 6 in the working cylinder 415 to the collection bottle 7. Next, push the push-pull rod 408 to make the membrane conveyor 405 enter between the washing tank 401 and the washing cylinder 414. Use the water pipe to rinse the membrane conveyor 405 without paper. The waste liquid after cleaning is discharged into the liquid container 8. Finally, the waste liquid is discharged into the waste liquid pool 15 through the drain pipe 14. Next, pull the push rod 408 to move the film conveyor 405 into the position corresponding to the paper tray 402, and place the filter membrane 409 into the paper tray 402. The filter membrane 409 falls along the tray wall onto the rubber ring 410. After cleaning, the surface of the film conveyor 405 is wet, which allows the filter membrane 409 to adhere tightly to the rubber ring. Next, pull the push rod 408 to move the film conveyor 405 into the corresponding position between the working tray 403 and the working cylinder 415. Then, tighten the disc clamp 4 so that the wall of the groove of the rubber ring 410 embedded on the film conveyor 405 engages with the annular groove 404 at the bottom of the working tray 403. The above operations fix the disc clamp 4 internally and make the filter cup 6 in the upper and lower disc clamps connected to the filter head 7. Position the movable clamp 10 at the four exhaust holes of the upper suction pipe 101, pour the liquid to be filtered into the filter cup 5, and then turn on the vacuum pump 16 to perform filtration. After filtration is completed, turn off the vacuum pump 16, loosen the disc clamp 4, and move the moving clamp 10 down to the four exhaust ports of the lower suction pipe 102. Push the piston 11 to push the air in the lower suction pipe 102 into the filter head 6, then separate the filter head 6 from the collection bottle 7. Then, remove the filter cup 5 and filter head 6 from the working tank 403 and working cylinder 415 respectively, and clean the disassembled instruments. Next, pull the push rod 408 to make the membrane transporter 405 emerge from the lower cover slot 413 of the lower disc clamp 417, remove the filter membrane 409, and then push the push rod 408 to make the membrane transporter 405 enter between the cleaning tank 401 and the cleaning cylinder 414. Next, move the moving clamp 10 up and pull the piston 11 to fill the lower suction pipe 102 with air, preparing for disassembly after the next filtration. A single filtration process is complete. To continue filtration, repeat the above operations.

[0055] Example 6

[0056] This utility model of a multi-position linkage laboratory filtration device has the following advantages: Four independent filtration devices are connected via a vacuum pump and an air extraction pipe, enabling simultaneous operation, significantly accelerating the filtration speed and shortening the experimental cycle; the working groove of the disc clamp is a limiting groove, achieving one-click precise alignment and secure fixing of the filter cup and filter head, reducing installation errors; the push-pull rod controls the movement of the membrane transporter on the sliding track, combined with rubber ring adsorption and paper tray size matching, ensuring rapid and accurate membrane loading and avoiding movement or deviation; the membrane transporter system integrates cleaning, paper loading, and positioning functions, achieving full automation of the membrane loading and filtration station process via the sliding track, reducing manual membrane replacement time; the movable clamp can switch between the upper and lower air extraction pipes, seamlessly connecting the filtration and disassembly processes, reducing single operation time; the multi-instrument parallel operation, rapid paper changing, and air exchange linkage design of this filtration device integrates traditional decentralized operations into a continuous process, significantly reducing the time spent on a single experiment, making it suitable for high-throughput or repetitive filtration needs.

Claims

1. A multi-position linked laboratory filtration apparatus, characterized by, The utility model provides a kind of vacuum pump exhaust system, including fixed frame (3) and disc clamp (4), four liquid collecting bottles (7) are provided on the fixed frame (3), fixed column (12) is provided at the center of the fixed frame (3), suction pipe (1) is provided on the fixed column (12), and the suction pipe (1) is connected with vacuum pump (16);The disc clamp (4) includes upper disc clamp (416) and lower disc clamp (417), four filter cups (5) are provided in the upper disc clamp (416), four filter heads (6) are provided in the lower disc clamp (417), the bottom of four filter cups (5) is communicated with the top of four filter heads (6), and four filter heads (6) are connected with liquid collecting bottle (7);The liquid collecting bottle (7) is connected with suction pipe (1).

2. The multi-position linked laboratory filtration apparatus of claim 1, wherein, The suction pipe (1) includes upper suction pipe (101) and lower suction pipe (102);The lower suction pipe (102) is fixed on the fixed column (12), the top of the lower suction pipe (102) is connected with the bottom of the upper suction pipe (101), and the upper suction pipe (101) and the lower suction pipe (102) are not communicated;Four exhaust holes are provided on the upper portion of the lower suction pipe (102) in circumferential direction, and four exhaust holes are provided on the lower portion of the upper suction pipe (101) in circumferential direction;The upper portion of the lower suction pipe (102) and the bottom of the upper suction pipe (101) are further sleeved with a movable clamp (10), and four air inlet nozzles are provided on the middle portion of the movable clamp (10) in circumferential direction;The four exhaust holes of the upper suction pipe (101) and the lower suction pipe (102) can be communicated with the first rubber hose (13) through the four air inlet nozzles on the movable clamp (10), and the first rubber hose (13) is connected with four filter heads (6);The lower portion of the lower suction pipe (102) is further provided with a pulling piston (11).

3. The multi-position linked laboratory filtration apparatus of claim 2, wherein, The upper portion of the upper suction pipe (101) is connected with the fixed frame (3) through a support rod (2), and the top of the upper suction pipe (101) is connected with the vacuum pump (16) through the second rubber hose (17);The lower portion of the upper suction pipe (101) is further sleeved with a bearing block (9), and the bearing block (9) is provided with a liquid container (8).

4. The multi-position linked laboratory filtration apparatus of claim 3, wherein, One side of the liquid container (8) is connected with a drainage pipe (14), and the drainage pipe (14) is connected with a wastewater pool (15).

5. The multi-position linked laboratory filtration apparatus of claim 3, wherein, The upper disc clamp (416) is sequentially provided with a cleaning tank (401), four paper placing grooves (402) and four working grooves (403) from the center to the outside; the working groove (403) contains a filter cup (5), the filter cup (5) extends out of the upper disc clamp (416), the lower disc clamp (417) is provided with a cleaning cylinder (414) at the center, the cleaning tank (401) corresponds to and communicates with the cleaning cylinder (414), the bottom of the cleaning cylinder (414) is connected with a liquid container (8), the upper air pipe (101) passes through the cleaning tank (401), the cleaning cylinder (414), the upper disc clamp (416), the lower disc clamp (417), the liquid container (8) and the bearing block (9), the lower disc clamp (417) is provided with four working cylinders (415) along the circumference, the working cylinder (415) contains a filter head (6), the filter head (6) extends out of the lower disc clamp (417), and the bottom of the filter head (6) is connected with a liquid collecting bottle (7).

6. The multi-position linked laboratory filtration apparatus of claim 5, wherein, The outer wall of the upper air pipe (101) is sleeved with a connecting shaft (407), the connecting shaft (407) is located between the cleaning cylinder (414) and the cleaning tank (401), four groups of sliding rails (406) are connected to the outer side of the connecting shaft (407), two sliding rails (406) are slidably connected with a film conveying device (405) between each other, the upper surface of the film conveying device (405) is provided with a clamping groove, a rubber ring (410) is inlaid in the clamping groove, a filter membrane (409) is placed on the surface of the rubber ring (410), a push-pull rod (408) is arranged on the side of the film conveying device (405) away from the connecting shaft (407), and four lower cover grooves (413) are further arranged on the outer wall of the lower disc clamp (417) in the circumferential direction.

7. The multi-position linked laboratory filtration apparatus of claim 5, wherein, The cleaning tank (401) is provided with a ring frame (411), the inner wall of the ring frame (411) is close to the outer wall of the upper air pipe (101), and the ring frame (411) is connected with the inner wall of the cleaning tank (401) through a connecting rod (412).

8. The multi-position linked laboratory filtration apparatus of claim 1, wherein, The inner wall of the upper disc clamp (416) has an internal thread, the inner wall of the lower disc clamp (417) has an external thread, and the upper disc clamp (416) and the lower disc clamp (417) are connected through threads.

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