Tangential flow filtering device

Abstract

The utility model relates to the technical field of filtering devices, in particular to a tangential flow filtering device which comprises a base, a storage tank and a membrane filtering box are arranged on the base, a back plate is arranged on the rear side wall of the base, a shell is arranged on the back plate, a box cover is arranged at the upper end of the membrane filtering box, and a limiting piece capable of ascending and descending and used for abutting against the box cover is arranged on the shell. A stirring assembly is arranged in the storage tank, a mounting bin is arranged in the shell, the mounting bin is used for driving a driving assembly of the stirring assembly to work, the driving assembly comprises a transmission part matched with the stirring assembly and a clutch part, and the clutch part is used for limiting the limiting part when being matched with the transmission part so that the limiting part can abut against the box cover all the time. The liquid in the storage tank can be stirred through the stirring assembly, the liquid flowing back into the storage tank can be mixed in the liquid in the storage tank, and the problems that the concentration of the liquid entering the membrane filtering box is not uniform, a filtering membrane in the membrane filtering box is prone to being blocked, and filtering of the liquid is not accurate are solved.

Description

TECHNICAL FIELD

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

[0002] Tangential flow filtration is a kind of membrane filtration process that sample is separated according to the pore size of filter membrane under the drive of pressure.When filtering, sample enters from the liquid inlet end of tangential flow assembly, and then cuts through the surface of the membrane of tangential flow assembly.Small molecules and buffer solution smaller than the pore size of membrane can permeate the membrane, and finally are discharged from the filter outlet end of tangential flow assembly;Molecules larger than the pore size of membrane are intercepted, and are discharged from the backflow end of tangential flow assembly and participate in the next cycle filtration.In this process, the flow rate of sample is parallel to the direction of filter membrane, and the flow rate of permeate is perpendicular to the direction of filter membrane.

[0003] At present, in the tangential flow filtration process, the liquid discharged from the backflow end can flow back to the sample container, and if the liquid flowed back from the backflow end and the liquid in the sample container are not fully mixed, it can cause the concentration of solution in the sample container to be uneven, which can easily cause membrane blockage and inaccurate filtration and other problems when entering the tangential flow assembly. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a tangential flow filtration device to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A tangential flow filtration device, comprising a base, a storage tank and a membrane filtration box are arranged on the base, a back plate is arranged on the rear side wall of the base, a shell is arranged on the back plate and located above the storage tank and the membrane filtration box, a detachable box cover is arranged at the upper end of the membrane filtration box, a limiting piece that can be lifted and used for abutting against the box cover is arranged on the shell, a stirring assembly is arranged in the storage tank, an installation bin is arranged in the shell, a driving assembly for driving the stirring assembly to work is arranged in the installation bin, the driving assembly comprises a transmission piece matched with the stirring assembly and a clutch piece, and the clutch piece is matched with the transmission piece to limit the limiting piece so that the limiting piece always abuts against the box cover.

[0007] Preferably, the limiting piece comprises a limiting cylinder and a limiting rod penetrating through the limiting cylinder, and a counterweight sliding block that slides in the limiting cylinder is arranged on the side wall of the limiting rod at the lower end of the limiting rod.

[0008] Preferably, the stirring assembly comprises a rotatable stirring shaft, stirring rods are distributed on the stirring shaft, and the upper end of the stirring shaft extends out of the storage tank.

[0009] As preferred, the upper end of the stirring shaft extends into the mounting chamber, and the extending end of the stirring shaft is provided with a first bevel gear;

[0010] The transmission member comprises a transmission rod rotatably arranged in the mounting chamber, and the transmission rod is provided with a second bevel gear engaged with the first bevel gear.

[0011] As preferred, the clutch member comprises a sliding seat slidingly arranged in the mounting chamber, and the sliding seat is provided with a rotating shaft rotatable, the end of the rotating shaft towards the transmission rod is provided with a first clutch disc, the side of the first clutch disc towards the transmission rod is provided with a protrusion, one end of the transmission rod is provided with a second clutch disc, the side of the second clutch disc towards the first clutch disc is provided with a groove for the protrusion to be clamped into, the mounting chamber is provided with a spring for driving the sliding seat to drive the first clutch disc to abut against the second clutch disc, and the shell is externally provided with a pushing member for driving the sliding seat to drive the first clutch disc away from the second clutch disc.

[0012] As preferred, the side wall of the mounting chamber is provided with a strip-shaped slot along the moving direction of the sliding seat, and the sliding seat is provided with a sliding plate extending out of the strip-shaped slot; and the pushing member comprises a pneumatic cylinder, and the output shaft of the pneumatic cylinder abuts against the sliding plate.

[0013] As preferred, the shell is externally provided with a fixed plate, the fixed plate is provided with a motor, the rotating shaft penetrates through the shell and is connected with the motor; the side of the fixed plate towards the shell is provided with a guide rod slidingly penetrating through the shell and extending into the mounting chamber, and the end of the guide rod located in the mounting chamber is threadedly installed with a limiting nut.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The stirring assembly can stir the liquid in the storage tank, so that the liquid flowing back into the storage tank is mixed with the liquid in the storage tank, thereby avoiding the problem of uneven concentration of the liquid entering the membrane filter box, which easily leads to blockage of the filter membrane in the membrane filter box and inaccurate filtration of the liquid.

[0016] 2. The clutch member and the transmission member cooperate to enable the driving assembly to drive the stirring assembly to work, i.e. the filter device is in a working state, at this time, the clutch member limits the limiting member so that the limiting member cannot be lifted and lowered, thereby always abutting against the box cover lapped on the upper end of the membrane filter box, so that the box cover cannot be opened, i.e. when the filter device is in a working state, the membrane filter box cannot be maintained and repaired by disassembling the box cover.

[0017] When the clutch member and the transmission member are disengaged, at this time, the clutch member cannot drive the stirring assembly to work through the transmission member, i.e. the filter device is stopped, at this time, the clutch member releases the limitation on the limiting member, so that the limiting member can be extended and retracted, thereby enabling the box cover to be opened, so as to maintain and repair the membrane filter box. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of a tangential flow filtering device in the utility model.

[0019] Figure 2 It is a cooperation structure schematic view of the stirring assembly, the limiting piece and the driving assembly in the utility model.

[0020] Figure 3 It is a sectional view schematic view of the stirring assembly, the limiting piece and the driving assembly in the utility model.

[0021] Figure 4 It is a cooperation structure schematic view of the transmission piece and the clutch piece in the utility model. Figure 3 It is an enlarged schematic view of part A in the utility model.

[0022] Figure 5 It is a cooperation structure schematic view of the transmission piece and the clutch piece in the utility model.

[0023] The meanings of various reference numerals in the drawings are as follows:

[0024] 10, base; 20, back plate; 100, storage tank; 101, tank cover; 110, membrane filtering box; 111, discharge pipe; 120, box cover; 130, fixed plate; 131, motor; 140, connecting pipe; 141, circulating pump; 150, return pipe;

[0025] 210, limiting cylinder; 211, limiting rod; 220, stirring shaft; 221, stirring rod;

[0026] 301, mounting bin; 311, first bevel gear; 320, transmission rod; 321, second bevel gear; 322, second clutch disc; 330, sliding seat; 331, rotating shaft; 332, first clutch disc; 340, spring;

[0027] 401, flange part; 410, counterweight sliding block;

[0028] 501, protruding block; 511, sliding plate; 521, guide rod. DETAILED DESCRIPTION

[0029] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings and examples.

[0030] The following combines the drawings and examples to further illustrate the utility model. Figures 1-5 The example is further described in detail.

[0031] As Figure 1As shown, the tangential flow filtration device in this embodiment includes a base 10, the base 10 is provided with a storage tank 100 and a membrane filtration box 110, wherein the storage tank 100 is used to store the liquid to be filtered, the membrane filtration box 110 is an open structure at the upper end, and a tangential flow filter membrane is installed inside it. In actual use, the bottom of the storage tank 100 is connected with the membrane filtration box 110 through the connecting pipe 140, and the circulating pump 141 is arranged on the connecting pipe 140. Thus, the liquid in the storage tank 100 is input into the membrane filtration box 110, wherein the side wall of the membrane filtration box 110 is provided with a discharge pipe 111 for discharging the filtered liquid, and the side wall of the membrane filtration box 110 and located at the upper part is provided with a backflow pipe 150 which is connected with the storage tank 100, so that the unfiltered liquid in the membrane filtration box 110 can flow back to the storage tank 100, so that it can enter the membrane filtration box 110 again for tangential flow filtration;

[0032] In this embodiment, the rear side wall of the base 10 is provided with a back plate 20, the back plate 20 is provided with a housing 21 located above the storage tank 100 and the membrane filtration box 110, the upper end of the membrane filtration box 110 is provided with a detachable box cover 120, the housing 21 is provided with a limiting piece which can be lifted and used to abut against the box cover 120, the storage tank 100 is provided with a stirring assembly, the housing 21 is provided with a mounting bin 301, the mounting bin 301 is used to drive the driving assembly of the stirring assembly, the driving assembly includes a transmission member matched with the stirring assembly and a clutch member, and the clutch member is matched with the transmission member to limit the limiting piece, so that the limiting piece always abuts against the box cover 120.

[0033] In this embodiment, the stirring assembly can stir the liquid in the storage tank 100, which can mix the liquid flowing back into the storage tank 100 with the liquid in the storage tank 100, avoiding the problem that the liquid entering the membrane filtration box 110 is not uniform in concentration, which can easily cause the membrane filtration box 110 to be blocked and the filtration of the liquid to be inaccurate;

[0034] Among them, the box cover 120 covers and overlaps the upper end of the membrane filtration box 110, so that the box cover 120 can be detached, thereby facilitating the operator to maintain and repair the membrane filtration box 110;

[0035] Through the structure in this embodiment, when the clutch member is matched with the transmission member in actual use, the driving assembly can drive the stirring assembly to work, at this time, the filtration device is in working state, at this time, the clutch member limits the limiting piece, so that the limiting piece cannot be lifted, resulting in that the limiting piece always abuts against the box cover 120 which overlaps the upper end of the membrane filtration box 110, so that the box cover 120 cannot be opened, that is, when the filtration device is in working state, the maintenance and repair of the membrane filtration box 110 cannot be carried out by detaching the box cover 120;

[0036] When the clutch member is disengaged from the transmission member, at this time, the clutch member cannot drive the stirring assembly to work through the transmission member, that is, the filter device is stopped, at this time, the clutch member releases the restriction on the limiting member, so that the limiting member can be extended and retracted, thereby enabling the box cover 120 to be opened, so as to maintain and repair the membrane filter box 110.

[0037] In combination Figures 2-4 As shown in the embodiment, the limiting member includes a limiting cylinder 210 and a limiting rod 211 penetrating through the limiting cylinder 210, and the limiting rod 211 is located on the side wall in the limiting cylinder 210 and is provided with a counterweight sliding block 410 sliding in the limiting cylinder 210, and the lower end of the limiting rod 211 extends to above the box cover 120.

[0038] In actual use, the limiting cylinder 210 has an open upper end, and a flange portion 401 is formed outwardly at the open upper end, and the flange portion 401 is fixed to the lower side wall of the shell 21 by screws, that is, the limiting member can be disassembled on the shell 21.

[0039] The counterweight sliding block 410 is arranged to drive the limiting rod 211 to move downward in the limiting cylinder 210 in a natural state, so that the lower end of the limiting rod 211 abuts against the box cover 120, at this time, when the clutch member limits the limiting rod 211 from ascending and descending, the box cover 120 cannot be disassembled, and when the clutch member releases the limiting rod 211, the limiting rod 211 can be lifted upward by lifting the box cover 120, thereby enabling the box cover 120 to be disassembled above the membrane filter box 110.

[0040] In the embodiment, the stirring assembly includes a rotatable stirring shaft 220, and stirring rods 221 are distributed on the stirring shaft 220, and the upper end of the stirring shaft 220 penetrates through the storage tank 100 and is arranged to extend outward.

[0041] In the embodiment, a detachable tank cover 101 is arranged at the top of the storage tank 100, the stirring shaft 220 penetrates through the tank cover 101 and is rotatably installed on the tank cover 101 through a bearing seat, and the stirring shaft 220 is rotated to drive the stirring rods 221 to stir the liquid in the storage tank 100.

[0042] The tank cover 101 is provided with a filling port to add the liquid to be filtered.

[0043] In the embodiment, the upper end of the stirring shaft 220 extends into the mounting bin 301, and the extending end of the stirring shaft 220 is provided with a first bevel gear 311.

[0044] The transmission member includes a transmission rod 320 rotatably arranged in the mounting bin 301, and the transmission rod 320 is provided with a second bevel gear 321 engaged with the first bevel gear 311.

[0045] Through the structure in the embodiment, the rotation of the transmission rod 320 through the cooperation of the first bevel gear 311 and the second bevel gear 321 can drive the stirring shaft 220 to rotate, thereby realizing the stirring operation of the stirring assembly.

[0046] In combination Figures 2-5 As shown in the drawings, in the embodiment, the clutch member includes a sliding seat 330 slidingly arranged in the mounting cavity 301, the sliding seat 330 is provided with a rotatable rotating shaft 331, the first clutch disc 332 is arranged on the end of the rotating shaft 331 facing the transmission rod 320, the protrusion 501 is arranged on the side of the first clutch disc 332 facing the transmission rod 320, the second clutch disc 322 is arranged on one end of the transmission rod 320, the recess for the protrusion 501 to be clamped is arranged on the side of the second clutch disc 322 facing the first clutch disc 332, the spring 340 for driving the sliding seat 330 to drive the first clutch disc 332 to abut against the second clutch disc 322 is arranged in the mounting cavity 301, and the pushing member for driving the sliding seat 330 to drive the first clutch disc 332 to move away from the second clutch disc 322 is arranged outside the shell 21.

[0047] In the embodiment, through the arrangement of the spring 340, in actual use, the spring 340 drives the sliding seat 330 to move, so that the first clutch disc 332 moves to the second clutch disc 322, so that the protrusion 501 is clamped in the recess, at this time, the rotation of the rotating shaft 331 can drive the transmission rod 320 to rotate, thereby driving the stirring shaft 220 to rotate; wherein, when the first clutch disc 332 moves to the second clutch disc 322, and the protrusion 501 is not clamped in the recess, the rotation of the rotating shaft 331 can drive the protrusion 501 to be clamped in the recess in cooperation with the pushing force of the spring 340, at this time, the rotation of the rotating shaft 331 can drive the transmission rod 320 to rotate, thereby driving the stirring shaft 220 to rotate, that is, the clutch member and the transmission member are matched to realize the work of the stirring assembly;

[0048] It should be noted that the upper end of the limiting rod 211 penetrates the shell 21 to extend into the mounting cavity 301, when the clutch member and the transmission member are matched, the sliding seat 330 slides to the upper end of the limiting rod 211, thereby limiting the limiting rod 211 from lifting and descending, so as to complete the abutting and limiting of the box cover 120 lapped on the membrane filter box 110;

[0049] The arrangement of the pushing member can drive the sliding seat 330 to drive the rotating shaft 331 to move away from the transmission rod 320, that is, the cooperation between the first clutch disc 332 and the second clutch disc 322 is released, at this time, the stirring assembly stops working, at the same time, the sliding seat 330 slides away from the upper end of the limiting rod 211 to release the limiting of the limiting rod 211, so that the box cover 120 can be disassembled;

[0050] In the embodiment, in order to enable the sliding seat 330 to stably slide in the mounting bin 301, a slide rail is arranged on the bottom wall of the mounting bin 301, and the sliding seat 330 is slidably arranged on the slide rail.

[0051] The rotating shaft 331 penetrates the sliding seat 330 and is rotatably arranged on the sliding seat 330 through a bearing seat, so that the rotating shaft 331 can be rotatably arranged while being moved by the sliding seat 330.

[0052] In order to rotatably arrange the transmission rod 320, the mounting bin 301 is provided with a mounting seat, one end of the transmission rod 320 is rotatably arranged on the side wall of the mounting bin 301 through a bearing, the other end penetrates the mounting seat and is rotatably arranged on the mounting seat through a bearing. In the embodiment, a strip-shaped slot is arranged on the side wall of the mounting bin 301 along the moving direction of the sliding seat 330, and a sliding plate 511 extending out of the strip-shaped slot is arranged on the sliding seat 330. The pushing member includes a cylinder 230, and the output shaft of the cylinder 230 abuts against the sliding plate 511.

[0053] Through the above structure, the output shaft of the cylinder 230 abutting against the sliding plate 511 can drive the sliding seat 330 to move away from the second clutch disc 322, so as to release the cooperation between the first clutch disc 332 and the second clutch disc 322. When the output shaft of the cylinder 230 is retracted, the spring 340 can drive the sliding seat 330 to move the first clutch disc 332 towards the second clutch disc 322, so as to preferably realize the cooperation between the first clutch disc 332 and the second clutch disc 322.

[0054] In the embodiment, a fixed plate 130 is arranged outside the shell 21, the fixed plate 130 is provided with a motor 131, the rotating shaft 331 penetrates the shell 21 and is connected with the motor 131, a guide rod 521 slidingly penetrating the shell 21 and extending into the mounting bin 301 is arranged on the side of the fixed plate 130 facing the shell 21, and a limiting nut is threadedly arranged at the end of the guide rod 521 in the mounting bin 301.

[0055] Through the structure in the embodiment, the guide rod 521 penetrates the shell 21, so that the fixed plate 130 and the rotating shaft 331 can be slidably arranged, the motor 131 can drive the rotating shaft 331 to rotate, and the stirring assembly can be driven to perform stirring operation when the clutch member cooperates with the transmission member.

[0056] The limiting nut is arranged, so that the guide rod 521 can be prevented from being separated from the shell 21, thereby affecting the actual use of the driving assembly.

[0057] In summary, the above description is only a preferred embodiment of the present application, and any change and modification made within the scope of the present application should be included in the scope of the present application.

Claims

1. A tangential flow filtration device comprising a base (10) having a reservoir (100) and a membrane filtration tank (110) disposed thereon, characterized in that: The rear side wall of the base (10) is provided with a back plate (20), the back plate (20) is provided with a shell (21) located above the storage tank (100) and the membrane filter box (110), the upper end of the membrane filter box (110) is provided with a detachable box cover (120), the shell (21) is provided with a limiting piece which can be lifted and used for abutting against the box cover (120), the storage tank (100) is provided with a stirring assembly, the shell (21) is provided with a mounting bin (301), the mounting bin (301) is used for driving the driving assembly of the stirring assembly, the driving assembly comprises a transmission piece matched with the stirring assembly and a clutch piece, the clutch piece is matched with the transmission piece and is used for limiting the limiting piece, so that the limiting piece always abuts against the box cover (120).

2. A tangential flow filtration device according to claim 1, wherein: The limiting piece comprises a limiting cylinder (210) and a limiting rod (211) penetrating through the limiting cylinder (210), the limiting rod (211) is located on the side wall in the limiting cylinder (210) and is provided with a counterweight sliding block (410) sliding in the limiting cylinder (210), and the lower end of the limiting rod (211) extends to the upper side of the box cover (120).

3. A tangential flow filtration device according to claim 2, wherein: The stirring assembly comprises a rotatable stirring shaft (220), the stirring shaft (220) is distributed with stirring rods (221), and the upper end of the stirring shaft (220) penetrates through the storage tank (100) and is arranged in an extending mode.

4. A tangential flow filtration device according to claim 3, wherein: The upper end of the stirring shaft (220) extends into the mounting bin (301), and the extending end of the stirring shaft (220) is provided with a first bevel gear (311); The transmission piece comprises a transmission rod (320) rotatably arranged in the mounting bin (301), and the transmission rod (320) is provided with a second bevel gear (321) engaged with the first bevel gear (311).

5. A tangential flow filtration device according to claim 4, wherein: The clutch piece comprises a sliding seat (330) slidingly arranged in the mounting bin (301), the sliding seat (330) is provided with a rotating shaft (331) rotatable, the end of the rotating shaft (331) towards the transmission rod (320) is provided with a first clutch disc (332), the side surface of the first clutch disc (332) towards the transmission rod (320) is distributed with a protrusion (501), one end of the transmission rod (320) is provided with a second clutch disc (322), the side surface of the second clutch disc (322) towards the first clutch disc (332) is distributed with a groove for clamping the protrusion (501), the mounting bin (301) is provided with a spring (340) for driving the sliding seat (330) to make the first clutch disc (332) abut against the second clutch disc (322), and the shell (21) is provided with a pushing piece for driving the sliding seat (330) to make the first clutch disc (332) away from the second clutch disc (322).

6. A tangential flow filtration device according to claim 2, wherein: A strip-shaped groove is formed in the side wall of the mounting bin (301) along the moving direction of the sliding seat (330), and the sliding seat (330) is provided with a sliding plate (511) extending out of the strip-shaped groove; the pushing piece comprises a gas cylinder (230), and the output shaft of the gas cylinder (230) abuts against the sliding plate (511).

7. A tangential flow filtration device according to claim 6, wherein: The shell (21) is externally provided with a fixed plate (130), the fixed plate (130) is provided with a motor (131), a rotating shaft (331) penetrates the shell (21) and is connected with the motor (131); the side of the fixed plate (130) facing the shell (21) is provided with a guide rod (521) slidingly penetrating the shell (21) and extending into the mounting bin (301), and the end of the guide rod (521) located in the mounting bin (301) is threadedly installed with a limiting nut.

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