CN113501585A

CN113501585A - Mute centrifugal membrane filter

Info

Publication number: CN113501585A
Application number: CN202110733161.1A
Authority: CN
Inventors: 苏秀榕
Original assignee: Zhejiang Zhenghegu Biotechnology Co ltd
Current assignee: Zhejiang Zhenghegu Biotechnology Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-10-15
Anticipated expiration: 2041-06-29
Also published as: CN113501585B

Abstract

The invention relates to the technical field of filtering pathogens in water, and discloses a mute centrifugal membrane filter, which comprises a shell and a centrifugal barrel rotating in the shell, wherein the lower end of the centrifugal barrel is fixed with a rotating shaft, the rotation of the rotating shaft is controlled by a motor, the shell and the centrifugal barrel are both arranged with upward openings, a gland component is arranged between the shell and the centrifugal barrel, the gland component comprises a lower cover detachably and hermetically arranged with the centrifugal barrel, an upper cover detachably arranged with the shell and a lubricating and supporting mechanism arranged on the upper cover and capable of driving the lower cover to smoothly rotate relative to the upper cover, the lubricating and supporting mechanism, the lower cover and the rotating shaft synchronously and concentrically rotate, the membrane filter component is detachably and hermetically arranged on the outer ring wall of the centrifugal barrel through a quick-disassembly sealing structure, a containing cavity for containing filtrate is formed between the centrifugal barrel and the shell, and a liquid guide mechanism for guiding out all the filtrate is arranged between the containing cavity and the shell, the centrifugal machine can be used for enriching and concentrating viruses and bacteria, and has the advantages of high centrifugal filtering efficiency, short time and long service life.

Description

Mute centrifugal membrane filter

Technical Field

The invention relates to the technical field of filtration of pathogens in water, in particular to a mute centrifugal membrane filter.

Background

With the increasing attention paid to food safety, environmental protection and the like, the requirement on a microorganism detection device for a water sample containing a small amount of microorganism pollution is increased, but the traditional membrane filtration of a suction cup can only be used for detecting a single sample at present, and a large amount of time is consumed when a large amount of samples are detected, so that the improved device, such as the bacteria collection instrument disclosed in patent document CN2393886Y, adopts triple filtration to simultaneously filter a plurality of samples, but the whole instrument adopts plastic products, sterilization can only adopt damp heat sterilization or alcohol soaking sterilization, and the required time is long, and the device is not high temperature resistant and corrosion resistant.

Chinese patent with publication number CN203079966U discloses an aquatic microbial membrane filtration device, which comprises a stainless steel bracket, at least one stainless steel filter, a stainless steel vacuum gauge, a vacuum filtration bottle, and a vacuum pump, wherein the vacuum gauge and the stainless steel filter are installed on the stainless steel bracket, the vacuum filtration bottle is installed between the stainless steel bracket and the vacuum pump, the stainless steel bracket and the vacuum filtration bottle are connected by a connecting pipe, and the filter comprises a stainless steel base and a stainless steel funnel installed on the stainless steel base.

The above-mentioned device increases the filtration efficiency by allowing simultaneous filtration of multiple samples, but in practice, the following disadvantages still remain: 1. the whole device is formed by assembling a plurality of independent parts, so that the whole device is large in size and difficult to store and carry; 2. the whole device needs to use instruments such as a vacuum pump, a stainless steel vacuum meter and the like, and the manufacturing cost is high; 3. the membrane blockage is a huge bottleneck for detecting pathogenic microorganisms, and the filter membrane in the scheme is inconvenient to replace.

Disclosure of Invention

Aiming at the problems of unchangeable filter membrane replacement, inconvenient storage and carrying and high manufacturing cost of the underwater microbial membrane filter device, the invention provides the mute type centrifugal membrane filter which is quick in filter membrane replacement, easy to store and carry and reasonable in manufacturing cost.

In order to solve the technical problems, the invention provides the following technical scheme: a mute centrifugal membrane filter comprises a shell and a centrifugal barrel rotationally arranged in the shell, wherein a rotating shaft is fixed at the lower end of the centrifugal barrel, the rotation of the rotating shaft is controlled by a motor fixed in the shell, the shell and the centrifugal barrel are both upwards opened, a gland component capable of driving the centrifugal barrel to perform sealed and mute rotation relative to the shell is arranged between the shell and the centrifugal barrel, the gland component comprises a lower cover which is detachably and hermetically arranged with the centrifugal barrel, an upper cover which is detachably arranged with the shell and a lubricating and supporting mechanism which is arranged on the upper cover and can drive the lower cover to smoothly rotate relative to the upper cover, the lubricating and supporting mechanism, the lower cover and the rotating shaft synchronously and concentrically rotate, a filter membrane used for filtering water and enriching microorganisms is arranged on the outer annular wall of the centrifugal barrel, the filter membrane is detachably arranged on the centrifugal barrel through a quick-dismantling sealing structure, and an accommodating cavity for accommodating filtrate is formed between the centrifugal barrel and the shell, a liquid guide mechanism capable of guiding out all filtrate is arranged between the accommodating cavity and the shell.

According to the scheme, the filter membrane is applied to the centrifugal structure, separation of pathogenic microorganisms in water from the water body is realized through centrifugal force, and filtration of the water body and enrichment of the microorganisms are realized through the filter membrane, so that the concentration of the microorganisms on the filter membrane can reach detectable concentration, and the detection efficiency is improved; secondly, the device can be realized by only one speed regulating motor, so that the manufacturing cost is obviously reduced; meanwhile, compared with the membrane filtering device in the reference, the membrane filtering device has small integral volume and is easy to store and carry; in addition, compared with the existing centrifugal machine, the additional gland assembly can keep the advantage of convenience in feeding of the centrifugal barrel and simultaneously prevent centrifugal liquid from splashing out of the centrifugal barrel in the high-speed centrifugation process, so that the operation error is reduced; after the upper cover and the lubricating and supporting mechanism are matched with the lower cover, a rotating supporting force is provided for the upper end face of the centrifugal barrel, the lubricating and supporting mechanism and the rotating shaft are concentrically arranged to drive the centrifugal barrel to not shake during rotation, so that the sound generated during rotation is reduced, a noise reduction effect is achieved, the rotating shaft and a motor shaft are protected from deformation, the service life of the centrifugal machine is prolonged, and the centrifugal machine is more environment-friendly and safer; the filtering membrane and the centrifugal barrel are quickly mounted or dismounted through the detachable sealing structure, so that the centrifugal efficiency is further improved; set up the drain mechanism, can derive filtrating fast outside centrifuge, it is convenient to derive, so, this membrane filter can reduce the cost, is convenient for accomodate and carry, and membrane filtration efficiency is high, has accelerated the enrichment of microorganism, and it is convenient to trade the membrane, and long service life just more environmental protection.

Furthermore, the lubricating and supporting mechanism comprises a fixed shaft which is arranged at the lower end of the upper cover in a protruding mode and is concentric with the rotating shaft, a first rotating disc which is sleeved outside the fixed shaft, and a rotating bearing which is arranged between the fixed shaft and the first rotating disc.

Furthermore, an axial buffer mechanism for reducing the axial buffer force of the centrifugal barrel is arranged between the first rotating disc and the lower cover and/or between the centrifugal barrel and the rotating shaft.

Furthermore, axial buffer gear is including dismantling the first elastic buffer who sets up in the lower cover up end, and the up end of first elastic buffer is sunken to have the jack that can supply first carousel interference to insert.

According to the scheme, the matching difficulty between the first rotating disc and the lower cover is simplified by the high friction force of the first elastic buffer part, the axial offset of the centrifugal barrel is obviously reduced by the aid of the elastic buffering performance of the first elastic buffer part, the rotating shaft and the motor are protected while noise is further reduced, and the centrifugal barrel is more environment-friendly.

Further, quick detach formula seal structure includes the filtration exit tube of protruding establishing on the centrifugation bucket outer wall, sets up in the sealed piece that blocks of spacing filter membrane in the filtration exit tube to the centrifugation bucket removal and be used for supporting the support filter element of filter membrane, can dismantle the cooperation on the filtration exit tube and have the spacing lid of ordering about the support filter element to compress tightly the filter membrane on sealed piece that blocks.

According to the scheme, the filter membrane is supported by the support filter disc, so that the filter membrane can be prevented from excessively deforming and breaking under the action of centrifugal force.

Further, spacing lid passes through screw thread tight fit structure fixed connection with filtering out the pipe, is provided with the protection mechanism who avoids supporting the filter element and receive rotatory extrusion force between spacing lid and support filter element.

According to the scheme, the traditional thread tight-fitting structure can provide rotary force for the supporting filter disc during jacking, and based on the cost consideration, the stainless steel filter disc with the thickness of 0.5mm is thin, and the rotary force is accommodated to cause deformation, so that the filter film is deformed or damaged, and a protection mechanism is very necessary.

Further, protection mechanism includes that one rotates the roof that sets up on spacing lid, and the filtrating flows to the holding cavity from spacing lid behind filter membrane, support filter element and the roof, is provided with the plane bearing who orders about the roof along the axial motion of outlet tube along with the rotation of spacing lid between spacing lid and roof.

According to above-mentioned scheme, protection machanism's setting avoids supporting the filter disc and receiving rotary torque when installing support filter disc and filter membrane fast, orders about its axial displacement only along the filtration pipe, ensures that it can not lead to the filter membrane deformation to damage promptly when supporting the pressure filter membrane.

Furthermore, be provided with joint normal running fit mechanism between roof and spacing lid, joint normal running fit mechanism includes the central snap ring that sets up on spacing lid and in the protruding rotation boss of establishing with central snap ring grafting complex of establishing on the roof, the one end that the roof was kept away from to the rotation boss outwards extends and has the joint spacing ring that can interference card income central snap ring.

Further, the shell includes upper and lower detachable complex epitheca and inferior valve, and centrifugation bucket and holding cavity are located the epitheca, and the motor is fixed in the inferior valve, and the pivot is vertical to run through epitheca and inferior valve and with epitheca and the sealed normal running fit of inferior valve.

Further, drain mechanism includes the fluid-discharge tube that extends to the inferior valve in holding cavity bottom downwardly, in the fluid-discharge valve that inferior valve outer wall lower extreme set up and both ends respectively with fluid-discharge tube and fluid-discharge valve sealing connection's hose.

Compared with the prior art, the invention has the following beneficial effects:

1. the filter membrane is applied in a centrifugal structure, pathogenic microorganisms in water are separated from the water body through centrifugal force, and the water body is filtered and the microorganisms are enriched through the filter membrane, so that the concentration of the microorganisms on the filter membrane can reach detectable concentration, and the detection efficiency is improved; secondly, the device can be realized by only one speed regulating motor, so that the manufacturing cost is obviously reduced; simultaneously, compare with the membrane filtration device among the reference, whole small in size easily accomodates and carries.

2. Set up the gland subassembly, the centrifugation bucket can be sealed to the lower cover in the gland subassembly, can avoid the centrifugate to spill the centrifugation bucket in high-speed centrifugation in-process when keeping the reinforced convenient advantage of centrifugation bucket, thereby reduce the operation error, and upper cover and lubricated supporting mechanism and lower cover cooperation back, provide the rotational support power for centrifugation bucket up end, lubricated supporting mechanism orders about the centrifugation bucket with the concentric setting of pivot and can not appear rocking when rotating, thereby reduce its sound that sends when rotating, play the noise reduction effect, protect pivot and motor shaft not take place deformation simultaneously, thereby extension centrifuge's life.

3. Set up axial buffer gear on lubricated supporting mechanism, the cooperation degree of difficulty between first carousel and the lower cover has been simplified to the high frictional force that utilizes a first elastic buffer spare, utilizes the elastic buffer performance of first elastic buffer spare to show the axial skew that reduces the centrifugation bucket simultaneously, protects pivot and motor when further making an uproar, more environmental protection.

4. Filter membrane and support filter element realize quick installation or quick dismantlement through dismantling seal structure and centrifugation bucket, through a spacing lid and the protection mechanism who sets up at spacing lid, avoid supporting the filter element and receive rotatory torsional deformation when installing filter membrane fast and supporting the filter element, thereby the protection filter membrane is indeformable or impaired, guarantee filter membrane and the life who supports the filter element when keeping filter membrane and supporting the filter element and filtering out the leakproofness between the pipe, filter membrane and the quick installation of supporting the filter element or dismantle can improve centrifuge long in service time, filtration efficiency and enrichment efficiency are improved.

5. Set up drain mechanism, the filtrating is arranged to the flowing back valve from the hose under the action of gravity, can all just derive fast outside the centrifuge according to opening of flowing back valve, and it is convenient to derive.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a front view of a mute type centrifugal membrane filter of the present embodiment;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged view of A of FIG. 2;

fig. 4 is an enlarged view of B of fig. 2;

FIG. 5 is a cross-sectional view B-B of FIG. 2;

FIG. 6 is an enlarged view of C of FIG. 5;

fig. 7 is a partially exploded view of the centrifugal bucket of the present embodiment.

In the figure: 1. a housing; 101. an upper shell; 102. a lower case; 2. a touch panel; 3. a drain valve; 4. a centrifuge bucket; 5. a lower cover; 6. an upper cover; 7. a motor; 8. an accommodating cavity; 9. a liquid discharge pipe; 10. a hose; 11. a controller; 12. a fixed shaft; 13. a rotating bearing; 14. a first turntable; 15. a first elastic buffer member; 16. supporting the filter disc; 17. a sealing barrier; 171. a ring groove; 172. an annular neck; 18. a second elastic buffer member; 19. a second turntable; 20. a limiting member; 21. a rotating shaft; 22. buckling; 23. a limiting cover; 24. clamping convex; 25. a top plate; 26. rotating the boss; 27. clamping the limiting ring; 28. a filtration tube; 29. a flat bearing; 30. a central snap ring; 31. a liquid passing groove; 32. an elastic sealing ring; 33. and (5) filtering the membrane.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Examples

A mute type centrifugal membrane filter is disclosed, referring to fig. 1-7, comprising a shell 1 and a centrifugal barrel 4, wherein the shell 1 comprises an upper shell 101 and a lower shell 102 which are arranged up and down detachably, in this embodiment, the upper shell 101 and the lower shell 102 are connected detachably through screws, the four corners of the bottom of the upper shell 101 are upwards bulged to form matching blocks with internal threads, the lower shell 102 is correspondingly provided with through holes, the screws pass through the through holes to be tightly matched with the matching blocks, the opening of the upper shell 101 is upwards arranged, the centrifugal barrel 4 with an upward opening is rotationally matched in the upper shell 101, a motor 7 is vertically fixed in the lower shell 102 through a fixing plate, matching holes are correspondingly arranged between the upper shell 101 and the lower shell 102, a rotating shaft 21 which penetrates through the upper shell 101 and the lower shell 102 and is matched and fixed with the shaft key of the motor 7 or fixedly connected and matched with the shaft coupling through the shaft coupling is detachably arranged at the lower end of the centrifugal barrel 4, a sealing ring is arranged between the rotating shaft 21 and the matching holes to realize sealed rotational matching, in order to realize the mute rotation of the centrifugal barrel 4 and to facilitate the taking out and cleaning of the centrifugal barrel 4, the lower end of the centrifugal barrel 4 is provided with a slot into which the rotating shaft 21 can be inserted.

A gland assembly capable of driving the centrifugal barrel 4 to rotate in a sealing and silent manner relative to the housing 1 is arranged between the upper casing 101 and the centrifugal barrel 4, as shown in fig. 2-3, the gland assembly comprises an upper cover 6, a lower cover 5 and a lubrication supporting mechanism rotatably arranged on the upper cover 6, the upper cover 6 and the upper casing 101 are detachably arranged, clamping protrusions 24 are symmetrically arranged on the outer wall of the upper cover 6, buckles 22 matched with the clamping protrusions 24 are hinged on the outer wall of the upper casing 101, the lubrication supporting mechanism comprises a fixed shaft 12 convexly arranged at the lower end of the upper cover 6 and concentric with a rotating shaft 21, a first rotating disc 14 sleeved outside the fixed shaft 12 and a rotating bearing 13 arranged between the fixed shaft 12 and the first rotating disc 14, the rotating bearing 13 can adopt a ball bearing, the inner ring of the rotating bearing 13 is in interference insertion fit with the fixed shaft 12, and an annular groove 171 for the outer ring of the rotating bearing 13 to be inserted in interference fit is recessed at the upper end of the first rotating disc 14,

in order to further play a role of silencing and protecting, referring to fig. 2-4, an axial buffer mechanism for reducing the axial buffer force of the centrifugal barrel is arranged between the first rotary disc 14 and the lower cover 5 and/or between the centrifugal barrel 4 and the bearing, and specifically referring to fig. 3, the axial buffer mechanism arranged between the first rotary disc 14 and the lower cover 5 comprises a first elastic buffer 15 detachably arranged on the upper end surface of the lower cover 5, the first elastic buffer is made of rubber, the upper end surface of the first elastic buffer 15 is recessed with a jack for the interference insertion of the first rotary disc 14, the first elastic buffer 15 is made of rubber, the first elastic buffer 15 and the lower cover 5 are in interference insertion fit, the upper end of the lower cover 5 is recessed with a containing groove for the insertion of the first elastic buffer 15, a plurality of limit convex strips are arranged in the containing groove in an inward projection manner, the lower end of the first elastic buffer 15 is provided with a slot for the elastic clamping of the limit convex strips, after the first elastic buffer 15 is clamped into the upper end surface of the lower cover 5, the material of the first elastic buffer 15 causes a large friction force between the first elastic buffer and the first rotary disc 14, as shown in fig. 4, the second elastic buffer 18 is inserted into the slot at the lower end of the centrifugal barrel 4 in an interference manner, the second rotary disc 19 is inserted into the lower end of the first elastic buffer 15 in an interference manner, a limiting part 20 for limiting the rotation of the second elastic buffer relative to the rotary shaft 21 is arranged inside the second rotary disc 19, the limiting part 20 is a flat key or a limiting block with non-circular inner and outer sides, and if the limiting block is arranged, the upper end of the rotary shaft is non-circular and is matched with an inner hole of the limiting block in an insertion manner.

The outer annular wall of the lower cover 5 is provided with an external thread, the inner annular wall of the opening of the centrifugal barrel 4 is provided with an internal thread matched with the lower cover 5, a sealing ring is arranged between the lower cover 5 and the centrifugal barrel 4, after the lower cover 5 is hermetically connected with the centrifugal barrel 4, when the rotating shaft 21 rotates, the lubricating and supporting mechanism, the lower cover 5 and the centrifugal barrel 4 synchronously and concentrically rotate, because the lubricating and supporting mechanism provides supporting force for the upper end of the lower cover 5 and the upper end of the centrifugal barrel 4 and provides lubricating property for the rotating shaft 21 by a bearing, the centrifugal barrel 4 rotates up and down concentrically, shaking during rotation of the centrifugal barrel 4 is avoided, sound generated during rotation is reduced, axial buffer force is provided for the centrifugal barrel 4 and the rotating shaft 21 by the axial buffer, the effect of protecting the rotating shaft 21 and further reducing the sound generated during rotation of the centrifugal barrel 4 is achieved, and the silencing effect is achieved.

The outer annular wall of the centrifugal barrel 4 is provided with a filter membrane 33 for filtering water and enriching microorganisms, the aperture range of the filter membrane is 0.22 μm-0.45 μm, as shown in fig. 5-7, at least one filter membrane 33 is arranged around the circumference of the centrifugal barrel 4 at intervals, two filter membranes are symmetrically arranged in the embodiment, the filter membrane 33 is detachably arranged on the centrifugal barrel 4 through a quick-release sealing structure, the quick-release sealing structure comprises a filtering pipe 28 convexly arranged on the outer wall of the centrifugal barrel 4, a sealing blocking piece 17 arranged in the filtering pipe 28 and used for limiting the filter membrane 33 to move towards the centrifugal barrel 4, and a supporting filter sheet 16 used for supporting the filter membrane 33, a limiting cover 23 which drives the supporting filter sheet 16 to press the filter membrane 33 on the sealing blocking piece 17 is detachably matched on the filtering pipe 28, the supporting filter sheet 16 is a stainless steel supporting filter sheet 16 with the thickness of 0.5mm, filtering micropores are uniformly distributed on the supporting filter sheet 16, the sealing blocking piece 17 is an elastic rubber blocking piece, a snap ring is convexly arranged on the inner annular wall of the filtering pipe 28, one end of the sealing barrier 17 close to the limiting cover 23 is sunken with an annular groove 171 for the filter membrane 33 to be partially or completely embedded, one end of the outer annular wall of the sealing barrier 17 far away from the limiting cover 23 is sunken with an annular clamping groove 172 for the snap ring to be elastically clamped in an interference manner, the limiting cover 23 is connected with the filtering pipe 28 through a threaded structure, an inner thread is arranged on the inner annular wall of the limiting cover 23, an outer thread is arranged on the outer annular wall of the filtering pipe 28, a containing cavity 8 for containing filtrate is formed between the centrifugal barrel 4 and the upper shell 101, and the filtrate flows into the containing cavity 8 after passing through the filter membrane 33, the supporting filter sheet 16 and the top plate 25.

If the limiting cover 23 is directly pushed in by rotation to press the supporting filter disc 16, the extremely thin supporting filter disc 16 will deform or even break under the action of torsion, therefore, a protection mechanism for preventing the supporting filter disc 16 from being subjected to rotational extrusion force is arranged between the limiting cover 23 and the supporting filter disc 16, the protection mechanism comprises a top plate 25 rotatably arranged on the limiting cover 23, the top plate 25 is rotatably matched with the limiting cover 23 through a clamping and rotating matching mechanism, as shown in fig. 6-7, the clamping and rotating matching mechanism comprises a central snap ring 30 extending towards the supporting filter disc 16 on the limiting cover 23 and a rotating boss 26 extending towards the limiting cover 23 on the top plate 25 and in inserted fit with the central snap ring 30, a plane bearing 29 is arranged between the limiting cover 23 and the top plate 25 on the rotating boss 26, and a clamping and limiting ring 27 in interference clamping fit with the central snap ring 30 is arranged at one end of the rotating boss 26 far from the top plate 25, the central snap ring 30 and the snap-fit limiting ring 27 are in the shape of a frustum with a diameter gradually decreasing from the end close to the filter tube 28 to the end far away from the filter tube 28, a plurality of liquid passing grooves 31 are arranged on the rotating boss 26 along the axial direction of the filtration pipe 28 in a penetrating way, a plurality of liquid passing grooves 31 are evenly arranged around the circumference of the rotating boss 26 at intervals, an elastic sealing ring 32 is arranged between the top plate 25 and the supporting filter disc 16, when the limit cover 23 is matched with the filtering pipe 28 to be pushed in, under the action of the plane bearing 29, the top plate 25 moves only along the axial direction of the filter tube 28 until the support filter 16 is pushed axially to limit the filter membrane 33 in the annular groove of the sealing barrier 17, and the support filter 16 is only pressed from the axial direction, so that torsional deformation does not occur, thereby ensure that filter membrane 33 keeps the tiling state, and overall structure leads to filter membrane 33's installation and dismantlement very convenient, only need spacing lid 23 of counter-rotation can take off support filter disc 16 and filter membrane 33 and change.

A liquid guiding mechanism capable of guiding out all filtrate is arranged between the accommodating cavity 8 and the lower shell 102, and as shown in fig. 2 and 5, the liquid guiding mechanism comprises a liquid discharge pipe 9 extending downwards from the bottom of the accommodating cavity 8 into the lower shell 102, a liquid discharge valve 3 arranged at the lower end of the outer wall of the lower shell 102, and a hose 10 with two ends respectively connected with the liquid discharge pipe 9 and the liquid discharge valve 3 in a sealing manner.

Be provided with touch panel 2 at inferior valve 102 outer wall, be provided with controller 11 in inferior valve 102, controller 11 is PLC, and controller 11 is connected with motor 7 and touch panel 2, the changeable motor speed of operation through touch panel to reach different centrifugal filter effect, increase the suitability.

When the centrifuge of this embodiment is used for centrifugation, firstly, a proper supporting filter 16 is selected for replacement, the limiting cover 23 and the elastic sealing ring 32 are taken down, the supporting filter 16 is embedded into the sealing barrier 17, then the elastic sealing ring 32 is placed in, the limiting cover 23 is screwed until the elastic sealing ring 32 at the front end of the top plate 25 elastically abuts the supporting filter 16 on the sealing barrier 17, then the upper cover 6 and the lower cover 5 are opened, the mixture of the water to be filtered is placed in the centrifuge bucket 4, then the lower cover 5 and the centrifuge bucket 4 are screwed and sealed, after the first elastic sealing element is in interference insertion fit with the upper cover 6, the first rotary disk 14 is inserted into the elastic sealing element, then the buckle 22 and the clamp boss 24 are buckled to drive the upper cover 6 to abut against the upper shell 101, at this time, the first rotary disk 14 elastically abuts against the first elastic buffering element 15, the rotation speed and the rotation time of the motor 7 are adjusted according to the touch panel 2, carry out the centrifugation after opening motor 7, at this moment, flowing back valve 3 is opened or is closed according to the demand, if be in the open mode, then the filtrating that self-supporting filter element 16 filtered out is direct outside holding cavity 8, fluid-discharge tube 9, hose 10 discharge to flowing back valve 3, need change support filter element 16 then directly according to the demand screw down spacing lid 23 can, it is very convenient to change, need wash the centrifuge bucket then can directly take out the centrifuge bucket, so, it is very convenient to wash.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Mute type centrifugal membrane filter sets up centrifuge bucket (4) in shell (1) including shell (1) and rotation, and the lower extreme of centrifuge bucket (4) is fixed with a pivot (21), and the rotation of pivot (21) is controlled by one and fixes motor (7) in shell (1), its characterized in that: the shell (1) and the centrifugal barrel (4) are both arranged with an upward opening, a gland component which can drive the centrifugal barrel (4) to rotate in a sealing and mute way relative to the shell (1) is arranged between the shell (1) and the centrifugal barrel (4), the gland component comprises a lower cover (5) which is detachably arranged with the centrifugal barrel (4) in a sealing way, an upper cover (6) which is detachably arranged with the shell (1) and a lubricating and supporting mechanism which is arranged on the upper cover (6) and can drive the lower cover (5) to rotate smoothly relative to the upper cover (6), the lubricating and supporting mechanism, the lower cover (5) and the rotating shaft (21) rotate synchronously and concentrically, a filter membrane (33) which is used for filtering water and enriching microorganisms is arranged on the centrifugal barrel (4) in a detachable way through a quick-detaching sealing structure, an accommodating cavity (8) for accommodating filtrate is formed between the centrifugal barrel (4) and the shell (1), a liquid guide mechanism which can guide out all filtrate is arranged between the accommodating cavity (8) and the shell (1).

2. A silent-type centrifugal membrane filter as claimed in claim 1, wherein: the lubricating and supporting mechanism comprises a fixed shaft (12) which is convexly arranged at the lower end of the upper cover (6) and is concentric with the rotating shaft (21), a first rotating disc (14) sleeved outside the fixed shaft (12) and a rotating bearing (13) arranged between the fixed shaft (12) and the first rotating disc (14).

3. A silent-type centrifugal membrane filter as claimed in claim 2, wherein: an axial buffer mechanism for reducing the axial buffer force of the centrifugal barrel is arranged between the first rotating disk (14) and the lower cover (5) and/or between the centrifugal barrel (4) and the rotating shaft (21).

4. A silent-type centrifugal membrane filter according to claim 3, wherein: the axial buffer mechanism comprises a first elastic buffer part (15) which is detachably arranged on the upper end surface of the lower cover (5), and a jack for interference insertion of the first rotary disc (14) is sunken in the upper end surface of the first elastic buffer part (15).

5. A silent-type centrifugal membrane filter as claimed in claim 1, wherein: the quick-release type sealing structure comprises a filtering pipe (28) which is convexly arranged on the outer wall of the centrifugal barrel (4), a sealing blocking piece (17) which is arranged in the filtering pipe (28) and is used for limiting the filter membrane (33) to move towards the centrifugal barrel (4), and a supporting filter disc (16) which is used for supporting the filter membrane (33), wherein a limiting cover (23) which drives the supporting filter disc (16) to compress the filter membrane (33) on the sealing blocking piece (17) is detachably matched on the filtering pipe (28).

6. A silent-type centrifugal membrane filter as claimed in claim 5, wherein: the limiting cover (23) is fixedly connected with the filtering pipe (28) through a thread tight-fitting structure, and a protection mechanism for preventing the supporting filter disc (16) from being subjected to rotary extrusion force is arranged between the limiting cover (23) and the supporting filter disc (16).

7. A centrifugal membrane filter of the silent type as claimed in claim 6, wherein: the protection mechanism comprises a top plate (25) rotatably arranged on the limiting cover (23), filtrate flows out of the limiting cover (23) to the accommodating cavity (8) after passing through the filter membrane (33), the supporting filter disc (16) and the top plate (25), and a plane bearing (29) which drives the top plate (25) to move along the axial direction of the filter tube (28) along with the rotation of the limiting cover (23) is arranged between the limiting cover (23) and the top plate (25).

8. A silent-type centrifugal membrane filter as claimed in claim 7, wherein: be provided with joint normal running fit mechanism between roof (25) and spacing lid (23), joint normal running fit mechanism include central snap ring (30) that set up on spacing lid (23) and in roof (25) the protruding rotation boss (26) of establishing with central snap ring (30) grafting complex of establishing, but rotate boss (26) and keep away from one end of roof (25) and outwards extend and have joint spacing ring (27) that interference card income central snap ring (30) are gone into.

9. A silent-type centrifugal membrane filter as claimed in claim 1, wherein: the shell (1) comprises an upper shell (101) and a lower shell (102) which are matched up and down in a detachable mode, the centrifugal barrel (4) and the accommodating cavity (8) are located in the upper shell (101), the motor (7) is fixed in the lower shell (102), and the rotating shaft (21) vertically penetrates through the upper shell (101) and the lower shell (102) and is in sealing rotation fit with the upper shell (101) and the lower shell (102).

10. A silent-type centrifugal membrane filter according to claim 9, wherein: the liquid guide mechanism comprises a liquid discharge pipe (9) which extends downwards to the inside of the lower shell (102) from the bottom of the accommodating cavity (8), a liquid discharge valve (3) which is arranged at the lower end of the outer wall of the lower shell (102), and a hose (10) of which two ends are respectively connected with the liquid discharge pipe (9) and the liquid discharge valve (3) in a sealing manner.