Suction filtration device

Abstract

The utility model relates to the technical field of suction filtration devices, in particular to a suction filtration device. The utility model provides a suction filtration device, which comprises a turntable, a combined shaft, a collecting bottle and at least two filter cartridges, the plurality of filter cartridges are positioned above the collecting bottle, and the diameters of the plurality of filter cartridges are different. According to the utility model, the plurality of filter cartridges with different diameters are arranged, when the flow of liquid to be filtered is large, the filter cartridges with larger diameters are selected, the turntable moves upwards along the axial direction of the combined shaft, and the turntable is rotated to drive the plurality of filter cartridges to rotate around the axis of the combined shaft; when the flow of the to-be-filtered liquid is small, the filter cartridge with the large diameter is selected, and when the flow of the to-be-filtered liquid is small, the filter cartridge with the small diameter is selected, so that the to-be-filtered liquid can be separated from the to-be-filtered liquid, and the to-be-filtered liquid can be separated from the to-be-filtered liquid by using the to-be-filtered liquid and the to-be-filtered liquid can be separated from the to-be-filtered liquid by using the to-be-filtered liquid. The cost is reduced while the filtering efficiency is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a filtration device technical field, concretely relates to a filtration device. BACKGROUND

[0002] The filtration device is an experimental device for realizing the operation of reduced pressure filtration (filtration) to separate the mixture of solid and liquid quickly.

[0003] The existing filtration device includes a filter cartridge, a butt joint pipe, a filter membrane, a suction pump and a collection bottle, the butt joint pipe is communicated at the bottom of the filter cartridge, the filter membrane is arranged on the inner bottom wall of the filter cartridge, the suction pump is opened, the filtrate to be filtered is poured into the filter cartridge to be filtered after forming negative pressure, and the filtered filtrate is collected into the collection bottle.

[0004] However, the filtration device has the problems that when the flow of the liquid to be filtered is large, the filtering efficiency of the filter cartridge is low, and when the flow of the liquid to be filtered is small, the filter membrane used in the filter cartridge is large due to the large size of the filter cartridge, which is wasteful and high in cost. CONTENT OF THE UTILITY MODEL

[0005] (1) The utility model solves the problem of how to reduce the cost without affecting the filtering efficiency and wasting the filter membrane.

[0006] (2) Technical scheme

[0007] The filtration device comprises a rotating disc, a combined shaft, a collection bottle and at least two filter cartridges.

[0008] The plurality of filter cartridges are located above the collection bottle, the diameters of the plurality of filter cartridges are different, a filter membrane adapted to each filter cartridge is arranged in each filter cartridge, and a butt joint pipe is communicated with the bottom of each filter cartridge.

[0009] The plurality of filter cartridges are connected to the rotating disc and arranged around the axis of the combined shaft.

[0010] The rotating disc can rotate around the axis of the combined shaft and move along the axis of the combined shaft, so that one butt joint pipe is inserted into the liquid inlet end of the collection bottle.

[0011] According to one embodiment of the utility model, the collection bottle comprises a bottle body and a liquid inlet pipe in communication, a ring groove is formed on the outer side wall of the end of the butt joint pipe away from the filter cartridge, a sealing ring is connected in the ring groove, and the butt joint pipe is sealingly inserted into the liquid inlet end of the liquid inlet pipe.

[0012] According to one embodiment of the utility model, the combined shaft comprises a rotating shaft, a connecting rod and a baffle.

[0013] One end of the connecting rod is connected with the rotating shaft, and the other end of the connecting rod is connected with the baffle;

[0014] The rotating disc is rotationally connected on the connecting rod;

[0015] The axis of the rotating shaft and the axis of the connecting rod coincide, and the diameters of the rotating shaft and the baffle are both greater than the diameter of the connecting rod;

[0016] The length of the connecting rod is greater than the thickness of the rotating disc.

[0017] According to one embodiment of the utility model, first spring is set on the connecting rod, one end of first spring is in abutment with baffle, the other end of first spring is in abutment with rotating disc.

[0018] According to one embodiment of the utility model, the filter device comprises a limiting piece, the limiting piece comprises a limiting slot formed at the top of the rotating shaft, a limiting block is slidably connected in the limiting slot, the limiting block is connected in the limiting slot through a second spring, a plurality of limiting slots adapted to the limiting block are formed in the bottom of the rotating disc, and the limiting slots correspond to the filter cartridges one by one.

[0019] According to one embodiment of the utility model, the filter device further comprises a motor, an air cylinder and a retaining piece;

[0020] The output end of the motor is fixedly connected with the air cylinder, and the pushing end of the air cylinder is connected with the rotating shaft.

[0021] The retaining piece is used for fixing the rotating disc on the rotating shaft.

[0022] According to one embodiment of the utility model, the retaining piece comprises a fixing bolt, a first screw hole is formed in the rotating disc, a second screw hole is formed in the rotating shaft, and the fixing bolt is screwed with the first screw hole and the second screw hole in sequence.

[0023] According to one embodiment of the utility model, the filter device further comprises a box body, the box body is provided with an accommodating cavity, the motor and the air cylinder are located in the accommodating cavity, and a limiting hole for limiting the rotating shaft is formed in the top of the box body.

[0024] According to one embodiment of the utility model, one side of the box body is connected with a base, and the collecting bottle is placed on the base.

[0025] According to one embodiment of the utility model, a controller is mounted on one side of the box body, and the motor and the air cylinder are electrically connected with the controller.

[0026] The utility model discloses beneficial effects:

[0027] When the flow of the liquid to be filtered is large, the filter cartridge with a large diameter is selected, the rotating disc is moved upward along the axial direction of the combined shaft, the rotating disc is rotated, the plurality of filter cartridges are rotated around the axial line of the combined shaft, the docking pipe connected with the filter cartridge with a large diameter is located above the collecting bottle, the rotating disc is moved downward along the axial direction of the combined shaft, the docking pipe is inserted into the liquid inlet end of the collecting bottle, the filter efficiency is improved by using the filter cartridge with a large diameter, when the flow of the liquid to be filtered is small, the filter cartridge with a small diameter is selected, the filter efficiency is not affected, meanwhile, the size of the filter membrane used in the filter cartridge with a small diameter is small, the filter membrane is saved, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 The front view of the suction filtration device provided by the embodiment of the present application is shown in the figure.

[0030] Figure 2 The three-dimensional structure schematic diagram of the retaining member, the rotating disc, the combined shaft, the motor, the air cylinder and the limiting member provided by the embodiment of the present application is shown in the figure.

[0031] Figure 3 The cross-sectional structure schematic diagram of the retaining member, the rotating disc, the combined shaft and the limiting member provided by the embodiment of the present application is shown in the figure.

[0032] Figure 4 The three-dimensional structure schematic diagram of the retaining member, the rotating disc, the combined shaft, the motor, the air cylinder and the limiting member provided by the embodiment of the present application is shown in the figure. Figure 3 The enlarged view of part A in the figure.

[0033] Figure 5 The three-dimensional structure schematic diagram of the retaining member, the rotating disc, the combined shaft, the motor, the air cylinder and the limiting member provided by the embodiment of the present application is shown in the figure.

[0034] Figure 6 The three-dimensional structure schematic diagram of the retaining member, the rotating disc, the combined shaft, the motor, the air cylinder and the limiting member provided by the embodiment of the present application is shown in the figure. Figure 5 The enlarged view of part B in the figure.

[0035] Figure legend: 1, rotating disc; 2, combined shaft; 201, rotating shaft; 202, connecting rod; 203, baffle; 3, collecting bottle; 301, liquid inlet pipe; 302, bottle body; 4, filter cartridge; 5, docking pipe; 6, first spring; 7, limiting member; 701, accommodating groove; 702, limiting block; 703, limiting groove; 704, second spring; 8, motor; 9, air cylinder; 10, fixing bolt; 11, first screw hole; 12, second screw hole; 13, box body; 14, base. Detailed Implementation

[0036] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] like Figures 1-6 As shown, one embodiment of the present invention provides a vacuum filtration device, including a turntable 1, a combination shaft 2, a collection bottle 3, and at least two filter cylinders 4;

[0038] Multiple filter cartridges 4 are located above the collection bottle 3. The diameters of the multiple filter cartridges 4 are different, and each filter cartridge 4 contains a filter membrane that is compatible with it. The bottom of each filter cartridge 4 is connected to a connecting pipe 5.

[0039] Multiple filter cartridges 4 are connected to the turntable 1, and the multiple filter cartridges 4 are arranged around the axis of the combined shaft 2;

[0040] Turntable 1 can rotate about the axis of combined shaft 2 and can move along the axis of combined shaft 2 so that one of the connecting pipes 5 can be inserted into the inlet end of the collection bottle 3.

[0041] By using multiple filter cartridges 4 of different diameters, when the flow rate of the liquid to be filtered is large, a filter cartridge 4 with a larger diameter is selected. The turntable 1 moves upward along the axis of the combined shaft 2, and at the same time, the turntable 1 is rotated, causing multiple filter cartridges 4 to rotate around the axis of the combined shaft 2 until the connecting pipe 5 connected to the filter cartridge 4 with a larger diameter is located directly above the liquid inlet end of the collection bottle 3 and stops. The turntable 1 is then moved downward along the axis of the combined shaft 2, and the connecting pipe 5 is inserted into the liquid inlet end of the collection bottle 3. Using a filter cartridge 4 with a larger diameter improves the filtration efficiency. When the flow rate of the liquid to be filtered is small, a filter cartridge 4 with a smaller diameter is selected. This does not affect the filtration efficiency, and the filter membrane used by the filter cartridge 4 with a smaller diameter is also smaller, saving filter membrane and reducing costs.

[0042] In addition, for the same amount of liquid to be filtered, the larger filter membrane lasts longer than the smaller filter membrane. Therefore, the filter membrane in the larger diameter filter cartridge 4 needs to be replaced less frequently, saving time and effort.

[0043] Currently, since different filtrate filtration tests also have requirements for the size of the filter membrane, traditional filtration devices only have one filter cylinder, so they can only be used for a limited number of filtrate types. However, in this embodiment, by setting multiple filter cylinders 4 with different diameters and filter membranes, it can be used for filtration tests of many kinds of filtrate, making it more practical.

[0044] It should be noted that, asFigure 3 As shown in the drawings, each docking pipe 5 has the same size. The distance from the axis of each docking pipe 5 to the axis of the combined shaft 2 is the same.

[0045] The suction filtration device further comprises an air suction pump for sucking the air in the collection bottle 3 to form a negative pressure in the collection bottle 3, thereby generating a pressure difference between the filter cartridge 4 and the collection bottle 3 to push the filtrate to pass through the filter membrane for filtration, which is a prior art and will not be described in detail.

[0046] According to an embodiment of the present application, the collection bottle 3 comprises a bottle body 302 and a liquid inlet pipe 301 in communication, and a ring groove is formed on the outer side wall of the end of the docking pipe 5 away from the filter cartridge 4, and a sealing ring is connected in the ring groove, and the docking pipe 5 is sealingly inserted into the liquid inlet end of the liquid inlet pipe 301.

[0047] The bottle body 302 can collect the filtered liquid.

[0048] The outer diameter of the docking pipe 5 is smaller than the inner diameter of the liquid inlet pipe 301.

[0049] Further, the sealing property between the docking pipe 5 and the liquid inlet pipe 301 can be enhanced by arranging an inner ring groove in the liquid inlet pipe 301 and installing a rubber ring in the inner ring groove. Preferably, a plurality of inner ring grooves are arranged at intervals along the axis direction of the liquid inlet pipe 301, and a rubber ring is installed in each inner ring groove.

[0050] Of course, in the present embodiment, the outer diameter of the liquid inlet pipe 301 can also be smaller than the inner diameter of the docking pipe 5, an outer ring groove is formed on the outer side wall of the liquid inlet pipe 301, and a rubber ring is connected on the outer ring groove, and the docking pipe 5 can be sealingly sleeved on the end portion of the liquid inlet pipe 301, and the purpose does not deviate from the design idea of the present application, and therefore, it shall belong to the protection scope of the present application.

[0051] According to an embodiment of the present application, the combined shaft 2 comprises a rotating shaft 201, a connecting rod 202 and a baffle 203;

[0052] One end of the connecting rod 202 is connected with the rotating shaft 201, and the other end of the connecting rod 202 is connected with the baffle 203;

[0053] The rotating disc 1 is rotationally connected on the connecting rod 202;

[0054] The axis of the rotating shaft 201 coincides with the axis of the connecting rod 202, and the diameter of the rotating shaft 201 and the diameter of the baffle 203 are both greater than the diameter of the connecting rod 202;

[0055] The length of the connecting rod 202 is greater than the thickness of the rotating disc 1.

[0056] The length of the connecting rod 202 is greater than the thickness of the rotating disc 1, so that the rotating disc 1 can move along the axis direction of the connecting rod 202, and the axis of the connecting rod 202 coincides with the axis of the combined shaft 2.

[0057] It should be noted that a circular hole is formed on the rotating disc 1, and the inner side wall of the circular hole is in contact with the outer side wall of the connecting rod 202.

[0058] Preferably, the end of the connecting rod 202 is provided with a thread, and the rotating shaft 201 is provided with a third threaded hole, and the end of the connecting rod 202 is screwed into the third threaded hole, at this time, the first spring 6 and the rotating disc 1 can be conveniently taken out for replacement, and the practicability is higher.

[0059] Optionally, the connecting rod 202 is welded with the rotating shaft 201.

[0060] According to an embodiment of the present application, the connecting rod 202 is sleeved with the first spring 6, one end of the first spring 6 abuts against one end of the baffle 203, and the other end of the first spring 6 abuts against the rotating disc 1.

[0061] Through the setting of the first spring 6, after the butt joint pipe 5 is inserted into the liquid inlet pipe 301, the filter device can well filter the liquid during the transfer, and the butt joint pipe 5 is not easy to be separated from the liquid inlet pipe 301 due to bumping and the like, and the stability is better.

[0062] According to an embodiment of the present application, the filter device comprises a limiting piece 7, the limiting piece 7 comprises a gap groove 701 formed at the top of the rotating shaft 201, the gap groove 701 is slidably connected with a limiting block 702, the limiting block 702 is connected in the gap groove 701 through a second spring 704, the bottom of the rotating disc 1 is provided with a plurality of limiting grooves 703 matched with the limiting block 702, and the limiting grooves 703 correspond to the filter cartridges 4 one by one.

[0063] In the initial state of the second spring 704, the limiting block 702 protrudes from the surface of the gap groove 701.

[0064] The extension direction of the second spring 704 is perpendicular to the rotating disc 1.

[0065] In the embodiment, four filter cartridges 4 are preferably provided, four limiting grooves 703 are provided, the diameters of the four filter cartridges 4 are sequentially reduced, and are sequentially recorded as a first cylinder, a second cylinder, a third cylinder and a fourth cylinder, the limiting groove 703 corresponding to the first cylinder is recorded as a first groove body, and the remaining three limiting grooves 703 corresponding to the second cylinder, the third cylinder and the fourth cylinder are sequentially recorded as a second groove body, a third groove body and a fourth groove body.

[0066] Assuming that the initial state is small flow, the barrel four is used, when the flow of the liquid to be filtered increases, the barrel three needs to be selected, at this time, manually lift the rotating disc 1 upwards, the limiting block 702 exits the fourth groove body, the butt joint pipe 5 corresponding to the barrel four is separated from the liquid inlet pipe 301, the rotating disc 1 is manually slightly rotated, and the lifting height of the rotating disc 1 is lowered, at this time, the second spring 704 is compressed, the limiting block 702 abuts against the lower surface of the rotating disc 1, the rotating disc 1 is continuously rotated, when the limiting block 702 enters the third groove body, at this time, the butt joint pipe 5 connected with the barrel three is just located above the liquid inlet pipe 301, the rotating disc 1 is released, the rotating disc 1 falls under the action of the first spring 6 and gravity, the butt joint pipe 5 connected with the barrel three is inserted into the liquid inlet pipe 301, in order to guarantee the sealing property, whether the butt joint pipe 5 is inserted in place can be confirmed by manually pressing down the rotating disc 1. At this time, the limiting piece 7 can play a role in pre-positioning, and the butt joint pipe 5 is convenient for being inserted into the liquid inlet pipe 301.

[0067] When the barrel two and the barrel one are selected, the above mode can be operated.

[0068] Preferably, the limiting block 702 comprises a rod body and a semispherical body connected with each other, and the limiting groove 703 is a semispherical groove.

[0069] Optionally, the limiting block 702 is a column body, and the limiting groove 703 is a circular groove.

[0070] According to one embodiment of the utility model, the suction filtration device further comprises a motor 8, an air cylinder 9 and a retaining piece;

[0071] The output end of the motor 8 is fixedly connected with the air cylinder 9, and the pushing end of the air cylinder 9 is connected with the rotating shaft 201.

[0072] The retaining piece is used for fixing the rotating disc 1 on the rotating shaft 201.

[0073] The multiple filter cartridges 4 are uniformly arranged around the axis line of the combined shaft 2, when the filter cartridges 4 are provided with N, the degree of the motor 8 per rotation is (360 degrees / N), preferably, when the filter cartridges 4 are provided with four, the motor 8 per rotation is set to 90 degrees.

[0074] According to one embodiment of the utility model, the retaining piece comprises a fixed bolt 10, the rotating disc 1 is provided with a first screw hole 11, the rotating shaft 201 is provided with a second screw hole 12, and the fixed bolt 10 is sequentially screwed with the first screw hole 11 and the second screw hole 12.

[0075] The first screw hole 11 and the second screw hole 12 are of the same specification. The first screw hole 11 is provided away from the limiting groove 703.

[0076] According to one embodiment of the utility model, the suction filtration device further comprises a box body 13, the box body 13 is internally provided with a containing cavity, the motor 8 and the cylinder 9 are both located in the containing cavity, and a clearance hole for accommodating the rotating shaft 201 is formed in the top of the box body 13.

[0077] According to one embodiment of the utility model, the box body 13 is connected with a base 14 on one side, and the collection bottle 3 is placed on the base 14.

[0078] In addition, the bottom of the box body 13 is provided with a plurality of wheels, which facilitates walking on the ground, and the top of the box body 13 is provided with a handle, which facilitates hand carrying and transportation.

[0079] According to one embodiment of the utility model, the box body 13 is provided with a controller on one side, and the motor 8 and the cylinder 9 are both electrically connected with the controller.

[0080] Further, a liquid supply pipe is arranged directly above the liquid inlet pipe 301, and a water pump is arranged on the liquid supply pipe, and the liquid supply pipe is used for supplying liquid to one filter cartridge 4 located directly above the liquid inlet pipe 301.

[0081] Specifically, the replacement of filter cartridges 4 with different diameters is divided into two modes, namely manual adjustment and automatic adjustment.

[0082] Mode one: when the filter cartridge 4 needs to be manually replaced, the fixed bolt 10 is screwed with the first screw hole 11, and the fixed bolt 10 is not screwed with the second screw hole 12, the first spring 6 is retractable, and the rotating disc 1 can move along the axial direction of the connecting rod 202 and rotate along the axial direction of the connecting rod 202.

[0083] The rotating disc 1 is manually lifted, that is, the rotating disc 1 moves axially upward along the connecting rod 202, the first spring 6 is compressed, the limiting block 702 moves away from the limiting groove 703, the rotating disc 1 is rotated, at this time, the lifting height of the rotating disc 1 is lowered, the first spring 6 is still in the compressed state, and the second spring 704 is also in the compressed state, the limiting block 702 abuts against the rotating disc 1, the rotating disc 1 is continuously rotated, when the rotating disc 1 is rotated to the next limiting groove 703, the second spring 704 releases the elastic force, the limiting block 702 enters the limiting groove 703, at this time, one of the butt joints 5 is located directly above the liquid inlet pipe 301, the rotating disc 1 is loosened, the rotating disc 1 falls under the action of gravity and the elastic force of the first spring 6, the end of the butt joint 5 enters the liquid inlet pipe 301, the rotating disc 1 is continuously pressed, and it is confirmed that the lower surface of the rotating disc 1 is in contact with the upper surface of the rotating shaft 201, the butt joint 5 is inserted into position and sealedly connected with the liquid inlet pipe 301. The liquid to be filtered is poured into the filter cartridge 4, so that the liquid is filtered through the filter membrane in the filter cartridge 4 and then flows into the bottle body 302 from the butt joint 5.

[0084] The second mode: when the filter cartridge 4 is replaced by the electric mode, the fixing bolt 10 is screwed with the first screw hole 11 and the second screw hole 12 in sequence, so that the rotating disc 1 is fixedly connected to the rotating shaft 201, that is, the rotating disc 1 cannot move relative to the rotating shaft 201.

[0085] The cylinder 9 drives the rotating shaft 201 to move upwards, and then drives the rotating disc 1 to move upwards, so that the butt joint pipe 5 is separated from the liquid inlet pipe 301, the second spring 704 is reset, and the limiting block 702 completely exits the limiting groove 703.

[0086] Through the automatic adjustment and manual adjustment, when the automatic adjustment mode fails, the filter cartridge 4 can be replaced by the manual adjustment mode, and the practicability is higher.

[0087] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0088] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "installation", "communication", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be direct communication, or indirect communication through intermediate medium, it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, in the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more.

[0089] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A filtration device, characterized in that, It includes a turntable (1), a combination shaft (2), a collection bottle (3), and at least two filter cartridges (4); Multiple filter cartridges (4) are located above the collection bottle (3). The diameters of the multiple filter cartridges (4) are different, and each filter cartridge (4) contains a filter membrane that is compatible with it. The bottom of each filter cartridge (4) is connected to a connecting pipe (5). Multiple filter cartridges (4) are connected to the turntable (1) and arranged around the axis of the combined shaft (2); The turntable (1) is rotatable about the axis of the combined shaft (2) and movable along the axis of the combined shaft (2) so that one of the connecting pipes (5) is inserted into the inlet end of the collection bottle (3).

2. The filtration device according to claim 1, characterized in that, The collection bottle (3) includes a bottle body (302) and an inlet pipe (301) connected together. The connecting pipe (5) has an annular groove on the outer wall of the end away from the filter cartridge (4). A sealing ring is connected in the annular groove. The connecting pipe (5) is sealed and inserted into the inlet end of the inlet pipe (301).

3. The filtration device according to claim 1, characterized in that, The combined shaft (2) includes a rotating shaft (201), a connecting rod (202), and a baffle (203); One end of the connecting rod (202) is connected to the rotating shaft (201), and the other end of the connecting rod (202) is connected to the baffle (203); The turntable (1) is rotatably connected to the connecting rod (202); The axis of the rotating shaft (201) coincides with the axis of the connecting rod (202), and the diameter of the rotating shaft (201) and the diameter of the baffle (203) are both larger than the diameter of the connecting rod (202). The length of the connecting rod (202) is greater than the thickness of the turntable (1).

4. A filtration device according to claim 3, characterized in that, A first spring (6) is sleeved on the connecting rod (202). One end of the first spring (6) abuts against the baffle (203), and the other end of the first spring (6) abuts against the turntable (1).

5. A filtration device according to claim 3, characterized in that, The filtration device includes a limiting member (7), which includes a clearance groove (701) opened on the top of the rotating shaft (201). A limiting block (702) is slidably connected in the clearance groove (701). The limiting block (702) is connected in the clearance groove (701) by a second spring (704). The bottom of the turntable (1) is provided with a plurality of limiting grooves (703) that are adapted to the limiting block (702). The limiting grooves (703) correspond one-to-one with the filter cylinder (4).

6. A filtration device according to claim 3, characterized in that, The filtration device also includes a motor (8), a cylinder (9), and a retaining component; The output end of the motor (8) is fixedly connected to the cylinder (9), and the pushing end of the cylinder (9) is connected to the rotating shaft (201); The retaining member is used to fix the turntable (1) on the rotating shaft (201).

7. A filtration device according to claim 6, characterized in that, The retaining component includes a fixing bolt (10), a first screw hole (11) is provided on the turntable (1), and a second screw hole (12) is provided on the rotating shaft (201). The fixing bolt (10) is screwed into the first screw hole (11) and the second screw hole (12) in sequence.

8. A filtration device according to claim 6, characterized in that, The filtration device also includes a housing (13), which has a receiving cavity inside. The motor (8) and cylinder (9) are both located in the receiving cavity. The top of the housing (13) has a clearance hole for making way for the rotating shaft (201).

9. A filtration device according to claim 8, characterized in that, A base (14) is connected to one side of the box (13), and the collection bottle (3) is placed on the base (14).

10. A filtration device according to claim 9, characterized in that, A controller is installed on one side of the housing (13), and the motor (8) and the cylinder (9) are both electrically connected to the controller.

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