Centrifugal filtering device

Abstract

The utility model provides a centrifugal filtering device and belongs to the technical field of filtering equipment. The problem that an existing filtering device is low in working efficiency is solved. The centrifugal filtering device comprises a barrel and a barrel-shaped filtering assembly, a base is fixed to the bottom end of the barrel, the filtering assembly is inserted into the barrel and abuts against the base, a liquid discharging pipe communicated with a cavity between the barrel and the filtering assembly is connected to the base, a rotatable rotating barrel is inserted into the filtering assembly, and the rotating barrel is connected with the liquid discharging pipe. A plurality of impeller blades are arranged on the outer side face of the rotary drum, the centrifugal filtering device further comprises a liquid adding pipe capable of adding liquid into a cavity between the rotary drum and the filtering assembly, and a liquid extraction pump is connected to the liquid adding pipe. The filtering process can be continuously carried out, time is not needed for subpackaging, meanwhile, filtering is carried out through centrifugal force, the filtering time is shortened, and the working efficiency is improved through the centrifugal filtering device.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtering equipment and relates to a centrifugal filtering device. Background Art

[0002] In multiple industries such as scientific research, chemical industry, pharmaceutical industry, and food processing, liquid filtration is a key step in separating solids from liquids. Liquid filtration is an operation in which, under the action of a driving force or other external forces, the liquid in the liquid to be filtered passes through the filter medium, and the solid particles are intercepted by the filter medium, thereby separating the solid from the liquid.

[0003] The filter medium commonly used in liquid filtration is filter paper. In a laboratory or testing room, a traditional liquid filtration device includes a funnel and a receiving bottle located below the funnel. The filter paper is placed in the funnel. When filtering, the liquid to be filtered is poured into the funnel, and the liquid passes through the filter paper under the action of gravity and flows into the receiving bottle, while the solid is intercepted by the filter paper. This kind of filtration device only relies on the self-gravity of the liquid as the driving force, resulting in a long filtration time and low working efficiency of the filtration device.

[0004] There is also centrifugal filtration using a centrifuge. Centrifugal filtration usually requires the use of a centrifugal filtration tube. For example, a centrifugal filtration tube [Publication No.: CN205253381U] disclosed in a Chinese patent document includes an outer tube and a centrifugal filtration component. The centrifugal filtration component is composed of an outer sleeve tube, an inner sleeve tube, and a filter membrane. The bottom of the outer sleeve tube is a hollow structure that can support the filter membrane. When in use, the solution sample to be processed is poured into the centrifugal filtration component, the tube cap is fastened, and the centrifugal filtration tube is placed in the centrifuge. The centrifuge is started, and under the action of gravity and centrifugal force, the sample is filtered through the filter membrane into the outer tube of the centrifugal filtration tube. After centrifugation stops, the centrifugal filtration component can be taken out to perform other experimental operations on the solution in the outer tube. However, the capacity of this centrifugal filtration tube is small. When the amount of liquid to be filtered is large, it needs to be manually divided and filled into several centrifugal filtration tubes, which takes a lot of time for the division and filling, resulting in a reduction in the working efficiency of the filtration device. Summary of the Utility Model

[0005] The purpose of the present utility model is to address the above problems existing in the prior art and propose a centrifugal filtration device, which solves the technical problem of low working efficiency of the existing filtration device.

[0006] The purpose of the present utility model can be achieved by the following technical solutions:

[0007] A centrifugal filtration device, comprising a cylinder body and a cylindrical filtration component, characterized in that a base is fixed at the bottom end of the cylinder body, the filtration component is inserted into the cylinder body and abuts against the base, a drain pipe communicating with the cavity between the cylinder body and the filtration component is connected to the base, a rotatable rotary drum is inserted into the filtration component, a plurality of impeller blades are arranged on the outer side surface of the rotary drum, the centrifugal filtration device further comprises a liquid adding pipe capable of adding liquid into the cavity between the rotary drum and the filtration component, and a liquid pumping pump is connected to the liquid adding pipe.

[0008] The liquid to be filtered is placed in a sample container. During filtration, the inlet end of the liquid adding pipe is inserted into the sample container, and then the liquid pumping pump works to extract and add the liquid to be filtered in the sample container between the rotary drum and the filtration component. The rotary drum rotates, and the impeller blades on the rotary drum drive the liquid to rotate. The rotation of the liquid generates centrifugal force, so that the liquid quickly passes through the filtration component, and the solids in the liquid are retained on the filtration component. The filtered liquid flows out from the drain pipe. The filtration process can be carried out continuously without spending time on sub-packaging, and at the same time, filtration is carried out by using centrifugal force, shortening the filtration time. Therefore, the working efficiency of this centrifugal filtration device is improved.

[0009] In the above-mentioned centrifugal filtration device, the outlet end of the liquid adding pipe is located above the impeller blades. During filtration, the liquid to be filtered can be added first and the rotary drum can be rotated at a low speed, and then the rotary drum can be rotated at a high speed for filtration, or the liquid to be filtered can be added while the rotary drum is rotated at a high speed, improving the working efficiency.

[0010] In the above-mentioned centrifugal filtration device, at least one branch is arranged on the liquid adding pipe, and a branch valve is connected to the branch. When a reagent needs to be added, the branch valve is opened, and when the reagent does not need to be added, the branch valve is closed. The reagent can be added to the liquid to be filtered through the branch, such as a flocculant that is beneficial for solid precipitation.

[0011] In the above-mentioned centrifugal filtration device, the filtration component comprises a first filter cylinder and a second filter cylinder, the second filter cylinder is inserted into the first filter cylinder, a plurality of liquid passing holes are arranged on both the first filter cylinder and the second filter cylinder, and a filter paper is fixed between the first filter cylinder and the second filter cylinder.

[0012] During filtration, the liquid is filtered through the filter paper. Since the filter paper is flexible, the first filter cylinder and the second filter cylinder support and fix the filter paper to ensure the filtration effect of the filter paper.

[0013] In the above-mentioned centrifugal filtration device, the first filter cylinder comprises two semi-cylindrical parts, the two parts are butted to form a cylindrical shape, there is a butting seam between the two parts, an opening seam corresponding to the butting seam is arranged on the cylinder body, a paper feeding shaft and a paper receiving shaft that can both rotate are further arranged on the outer side of the cylinder body, and both ends of the filter paper extend out from the butting seam and the opening seam in sequence and are respectively wound around the paper feeding shaft and the paper receiving shaft.

[0014] The rotation of the paper receiving shaft can extract the filtered filter paper. As the filtered filter paper is extracted, the unfiltered filter paper is pulled from the paper feeding shaft between the first filter cylinder and the second filter cylinder. In this way, the replacement of the filtered filter paper can be carried out very conveniently, and the replacement time of the filter paper is reduced, which is beneficial to improving the working efficiency of the filtering device.

[0015] In the above-mentioned centrifugal filtering device, a three-way valve is arranged on the drain pipe, and branch pipes are respectively connected to the two outlet ends of the three-way valve. In this way, the filtered liquid can be shunted. For example, before formal filtration, the cylinder body, the filtering component and the rotating cylinder need to be cleaned, and the waste liquid generated by the cleaning can flow out through one of the branch pipes. When formal filtration is carried out after cleaning, the liquid generated by filtration flows out through the other branch pipe, which is convenient to use.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The filtering process can be carried out continuously without spending time on sub-packaging. At the same time, centrifugal force is used for filtering, which shortens the filtering time and improves the working efficiency of the centrifugal filtering device. The filter paper can be replaced by the rotation of the paper feeding shaft and the paper receiving shaft, and the replacement is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the first embodiment of the centrifugal filtering device.

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Figure 3 is a three-dimensional structural diagram of the combination of the filtering component, the cylinder body and the rotating cylinder in the first embodiment of the centrifugal filtering device.

[0021] Figure 4 is a three-dimensional structural diagram of the combination of the filtering component, the cylinder body, the rotating cylinder, the paper feeding shaft and the paper receiving shaft in the second embodiment of the centrifugal filtering device.

[0022] Figure 5 is a three-dimensional structural diagram of the disassembly of the filtering component, the cylinder body, the rotating cylinder, the paper feeding shaft and the paper receiving shaft in the second embodiment of the centrifugal filtering device.

[0023] In the figure, 1 is the cylinder body; 1a is the slit; 2 is the filter assembly; 2a is the first filter cartridge; 2a1 is the split body; 2a2 is the bolt; 2a3 is the butt joint seam; 2b is the second filter cartridge; 2b1 is the sealing plate; 2b2 is the reinforcing rib; 2c is the filter paper; 2d is the liquid through hole; 3 is the base; 4 is the drain pipe; 5 is the rotating cylinder; 5a is the wave wheel blade; 5b is the connecting plate; 6 is the liquid adding pipe; 6a is the branch; 7 is the liquid pumping pump; 8 is the sealing ring; 9 is the main motor; 10 is the outer cover; 11 is the branch valve; 12 is the three-way valve; 13 is the branch pipe; 14 is the collection bottle; 15 is the waste liquid bottle; 16 is the sample container; 17 is the sample adding pipe; 18 is the sample adding pump; 19 is the reagent container; 20 is the reagent pump; 21 is the paper feeding shaft; 22 is the paper receiving shaft; 23 is the base. Detailed implementation mode

[0024] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments. Embodiment 1

[0025] As Figure 1 shown, a centrifugal filtration device includes a cylindrical cylinder body 1 and a cylindrical filter assembly 2. A base 3 is fixed at the bottom end of the cylinder body 1. The filter assembly 2 is inserted into the cylinder body 1 and abuts against the base 3. A drain pipe 4 communicating with the cavity between the cylinder body 1 and the filter assembly 2 is connected to the base 3. A rotatable rotating cylinder 5 is inserted into the filter assembly 2. Wave wheel blades 5a are arranged on the outer side surface of the rotating cylinder 5. There are several wave wheel blades 5a and they are evenly arranged along the circumferential direction. The wave wheel blades 5a are fixed on the rotating cylinder 5 by welding. The centrifugal filtration device further includes a liquid adding pipe 6, and the liquid adding pipe 6 can add liquid to the cavity between the rotating cylinder 5 and the filter assembly 2. A liquid pumping pump 7 is connected to the liquid adding pipe 6.

[0026] Combined Figure 2 and Figure 3 shown, the filter assembly 2 includes a first filter cartridge 2a and a second filter cartridge 2b. The second filter cartridge 2b is inserted into the first filter cartridge 2a. A plurality of liquid through holes 2d are provided on both the first filter cartridge 2a and the second filter cartridge 2b. A filter paper 2c is fixed between the first filter cartridge 2a and the second filter cartridge 2b. The bottom end of the second filter cartridge 2b has a sealing plate 2b1. Reinforcing ribs 2b2 are arranged on the lower surface of the sealing plate 2b1. The bottom end of the rotating cylinder 5 has a connecting plate 5b. A sealing ring 8 is arranged between the connecting plate 5b of the rotating cylinder 5 and the sealing plate 2b1. The sealing ring 8 is fixed on the lower surface of the connecting plate 5b. The centrifugal filtration device further includes a base 23, and a main motor 9 is fixed in the base 23. The base 3 is fixedly connected to the top surface of the base 23. The rotating shaft of the main motor 9 passes upward through the base 23, the base 3 and the sealing plate 2b1 and is fixedly connected to the connecting plate 5b of the rotating cylinder 5. A plain bearing is further arranged between the connecting plate 5b of the rotating cylinder 5 and the sealing plate 2b1 to make the rotation of the rotating cylinder 5 stable and smooth. The plain bearing is located inside the sealing ring 8.

[0027] As shown Figure 1 in the figure, the centrifugal filtration device further includes an outer cover 10. The outer cover 10 covers the outside of the cylinder body 1 and abuts against the base 23, and the outer cover 10 is removable. A jack is provided at the top of the outer cover 10. The outlet end of the liquid adding pipe 6 passes through the jack and is inserted between the second filter cartridge 2b and the rotary drum 5. The outlet end of the liquid adding pipe 6 is located above the impeller blades 5a. A positioning sleeve is provided on the liquid adding pipe 6, and the positioning sleeve abuts against the top surface of the outer cover 10. The inlet end of the liquid adding pipe 6 is inserted into the sample container 16. A sampling pipe 17 is further connected to the sample container 16. A sampling pump 18 is connected to the sampling pipe 17, and the inlet end of the sampling pipe 17 is connected to the stock solution container. At least one branch 6a is provided on the liquid adding pipe 6. The inlet end of the branch 6a is inserted into the reagent container 19. A branch valve 11 and a reagent pump 20 are connected to the branch 6a. The reagent pump 20 is located between the branch valve 11 and the inlet end of the branch 6a. The drain pipe 4 passes through the base 23. A three-way valve 12 is provided on the drain pipe 4. The two outlet ends of the three-way valve 12 are respectively connected to a branch pipe 13. A collection bottle 14 is placed below one of the branch pipes 13, and a waste liquid bottle 15 is placed below the other branch pipe 13. Conveyor belts can also be respectively provided below the collection bottle 14 and the waste liquid bottle 15 to convey the filtered liquid away.

[0028] A control panel is provided on the base 23. The branch valve 11 and the three-way valve 12 are solenoid valves or electric valves. The main motor 9, the branch valve 11, the three-way valve 12, the sampling pump 18, the reagent pump 20, the liquid extraction pump 7, etc. are all electrically connected to the control panel to realize automated operation.

[0029] The sampling pump 18 operates to extract the liquid in the stock solution container into the sample container 16. During filtration, the inlet end of the liquid adding pipe 6 is inserted into the sample container 16, and then the liquid extraction pump 7 operates to extract and add the liquid to be filtered in the sample container 16 between the rotary drum 5 and the filtration assembly 2. The rotary drum 5 rotates, and the impeller blades 5a on the rotary drum 5 drive the liquid to rotate. The rotation of the liquid generates centrifugal force, so that the liquid quickly passes through the filtration assembly 2, and the solids in the liquid are intercepted on the filter paper 2c. The filtered liquid flows out from the drain pipe 4. The filtration process can be continuously carried out without spending time on the sub-packaging of the liquid to be filtered. At the same time, filtration is carried out using centrifugal force, which shortens the filtration time. Therefore, the working efficiency of this centrifugal filtration device is improved. Embodiment 2

[0030] As Figure 4 and Figure 5As shown in the figure, on the basis of the first embodiment, an automatic paper changing mechanism is added. Specifically, a rotatable paper feeding shaft 21 and a paper receiving shaft 22 are arranged between the outer cover 10 and the cylinder body 1 on the base 23, and both the paper feeding shaft 21 and the paper receiving shaft 22 are vertically arranged. A paper changing motor is also fixed inside the base 23, and the rotating shaft of the paper changing motor is fixedly connected to the paper receiving shaft 22, and the paper changing motor drives the paper receiving shaft 22 to rotate. The paper feeding shaft 21 passes through the top of the base 23 and is provided with bearings. For the specific structure of the automatic paper changing mechanism, reference can also be made to the patent document with the publication number CN203212103U.

[0031] The first filter cartridge 2a includes two semi-cylindrical parts 2a1, and the two parts 2a1 are butted to form a cylindrical shape. Corresponding connecting lugs are respectively arranged on the two parts 2a1, and a bolt 2a2 is connected to the connecting lugs. The two parts 2a1 are fixed by the bolt 2a2, and the bolt 2a2 passes through one of the connecting lugs and is threadedly connected to the other connecting lug. In order to facilitate the rotation operation of the bolt 2a2, an operation opening is arranged on the cylinder body 1 corresponding to the connecting lug, and a detachable cover plate is arranged at the operation opening. The cover plate is generally fixed to the cylinder body 1 by screws. There is a butting seam 2a3 between the two parts 2a1, and a slit 1a corresponding to the butting seam 2a3 is arranged on the cylinder body 1. The two ends of the filter paper 2c sequentially extend out from the butting seam 2a3 and the slit 1a and are respectively wound around the paper feeding shaft 21 and the paper receiving shaft 22. The circumferential width of the slit 1a is slightly larger than or equal to the thickness of two layers of the filter paper 2c to reduce the leakage of liquid from the slit 1a. The rotation of the paper receiving shaft 22 can draw out the filtered filter paper 2c. As the filtered filter paper 2c is drawn out, the unfiltered filter paper 2c is pulled from the paper feeding shaft 21 between the first filter cartridge 2a and the second filter cartridge 2b. In this way, the replacement of the filtered filter paper 2c can be very convenient, and the replacement time of the filter paper 2c is reduced, which is beneficial to improving the working efficiency of the filtering device.

[0032] Install the control panel on the base 23. The branch valve 11 and the three-way valve 12 are solenoid valves or electric valves. Electrically connect the main motor 9, the paper-changing motor, the branch valve 11, the three-way valve 12, the sample addition pump 18, the reagent pump 20, the liquid extraction pump 7, etc. to the control panel to achieve automated operation. After the filtration is completed, it can also automatically stop. By using the principle of measuring the motor current, when the current of the main motor 9 reaches the no-load rotation current, the controller of the control panel automatically controls the main motor 9 to stop. During the industrial process, through the cooperation of automated control and the frequency converter, the current of the main motor 9 is monitored and adjusted in real time to maintain a constant speed and high efficiency. This centrifugal filtration device has the following advantages: 1. High efficiency and speed: Adopt the vortex filtration method. After calculation, the filtration time of 15 kg of water can be shortened to 30 seconds; 2. Intelligent control: Realize operations such as automatic liquid addition and liquid drainage during the filtration process; 3. Simple operation: Adopt an automatic paper-changing mechanism. There is no need to manually replace the filter paper 2c. The paper-changing motor is a stepping motor, which can automatically send the waste paper out through the paper receiving shaft 22 according to the circumference of the first filter cartridge 2a, and change the new paper to the first filter cartridge 2a; 4. Energy conservation and environmental protection: Reduce the output power of the motor and reduce energy consumption; 5. Safe and reliable: Automatically drain the waste liquid to avoid manual operation errors. Embodiment III

[0033] Compared with Embodiment I or Embodiment II, this embodiment is different in that the wave wheel blade 5a is fixedly connected to the rotating cylinder 5 through a hinge. The hinge is a hinge with a rotation angle of 90°. When the rotating cylinder 5 rotates forward, the wave wheel blade 5a is perpendicular to the side wall of the rotating cylinder 5. When the rotating cylinder 5 rotates reversely, the wave wheel blade 5a is tangent to the side wall of the rotating cylinder 5. During use, the rotating cylinder 5 can be rotated reversely first to make the wave wheel blade 5a tangent to the side wall of the rotating cylinder 5, that is, the wave wheel blade 5a is retracted. Then, the liquid addition pipe 6 adds liquid to the cavity between the rotating cylinder 5 and the filtration assembly 2. Then the rotating cylinder 5 rotates forward, and the wave wheel blade 5a is perpendicular to the side wall of the rotating cylinder 5, that is, the wave wheel blade 5a is opened. The wave wheel blade 5a drives the liquid to rotate for filtration.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A centrifugal filter device, comprising a cylinder (1) and a cylindrical filter assembly (2), characterized in that: A base (3) is fixed to the bottom end of the cylinder (1); the filter assembly (2) is inserted into the cylinder (1) and abuts against the base (3); a liquid discharge pipe (4) is connected to the base (3) and is in communication with the cavity between the cylinder (1) and the filter assembly (2); a rotatable drum (5) is inserted into the filter assembly (2); a plurality of impeller blades (5a) are arranged on the outer surface of the drum (5); and the centrifugal filtering device further comprises a liquid adding pipe (6) capable of adding liquid to the cavity between the drum (5) and the filter assembly (2); and a liquid pump (7) is connected to the liquid adding pipe (6).

2. The centrifugal filter device according to claim 1, characterized in that: The outlet end of the liquid adding pipe (6) is located above the impeller blades (5a).

3. The centrifugal filter device according to claim 1, characterized in that: At least one branch (6a) is provided on the liquid adding pipe (6), and a branch valve (11) is connected to the branch (6a).

4. The centrifugal filter device according to any one of claims 1 to 3, characterized in that: The filter assembly (2) comprises a first filter cartridge (2a) and a second filter cartridge (2b), the second filter cartridge (2b) being inserted into the first filter cartridge (2a), a plurality of liquid holes (2d) being provided on the first filter cartridge (2a) and the second filter cartridge (2b), and filter paper (2c) being fixed between the first filter cartridge (2a) and the second filter cartridge (2b).

5. The centrifugal filter device according to claim 4, characterized in that: The first filter cartridge (2a) comprises two semi-cylindrical parts (2a1), the two parts (2a1) being butt-jointed to form a cylindrical shape, a butt joint (2a3) being provided between the two parts (2a1), an opening (1a) corresponding to the butt joint (2a3) being provided on the cylinder (1), and a rotatable paper feed shaft (21) and a paper receiving shaft (22) being provided on the outer side of the cylinder (1), the two ends of the filter paper (2c) extending out from the butt joint (2a3) and the opening (1a) in sequence and being respectively wound on the paper feed shaft (21) and the paper receiving shaft (22).

6. The centrifugal filter device according to any one of claims 1 to 3, characterized in that: The liquid discharge pipe (4) is provided with a three-way valve (12), and two outlet ends of the three-way valve (12) are respectively connected to branch pipes (13).

Images