CN105833727A

CN105833727A - Membrane core pre-tightening structure

Info

Publication number: CN105833727A
Application number: CN201610393230.8A
Authority: CN
Inventors: 宋岱峰; 韩亮
Original assignee: CHENGDU MFT MEMBRANE TECHNOLOGY Co Ltd
Current assignee: Chengdu Meifote Membrane Environmental Protection Technology Co., Ltd.
Priority date: 2016-06-03
Filing date: 2016-06-03
Publication date: 2016-08-10
Anticipated expiration: 2036-06-03
Also published as: CN105833727B

Abstract

The invention discloses a membrane core pre-tightening structure capable of better guaranteeing an axial pressing state of a membrane core. A membrane core sleeving a mandrel consists of a plurality of membrane filtration units and is set as the axial pressing state to be disposed between a first end cover component and a hanging second end cover component through the membrane core pre-tightening structure. During filtration, raw material fluid passes through all the membrane filtration units sequentially from a membrane mandrel axial end opposite to the second end cover component and then moves towards a membrane mandrel axial end opposite to the first end cover component. The membrane core pre-tightening structure comprises a hanging floating pressing mechanism moving towards the direction of axially pressing the membrane core during filtration, and the floating pressing mechanism comprises a fastening mechanism and a floating component, wherein the fastening mechanism is used for axially pressing the membrane core between the first end cover component and the second end cover component, and the floating component is arranged between the second end cover component and the membrane core and can be driven by the raw material fluid to move towards the direction of axially pressing the membrane core during filtration.

Description

Film core pre-pressing structure

Technical field

The present invention relates to the film core pre-pressing structure in filtration, purification field, particularly relate to the nanofiltration in water treatment field or reverse osmosis membrane Core pre-pressing structure.

Background technology

Present applicant develops a kind of membrane filtration module being mainly used in sewage nanofiltration or reverse-osmosis treated, this membrane filtration Assembly, including shell, mandrel, film core, the first end-cap assembly, the second end-cap assembly, film core pre-pressing structure and material flow Input port and purification fluid outlet, described film core retainer plate is located on mandrel and is made up of multiple membrane filter units, by these membrane filtrations The film core of unit composition is configured to axial compression state by film core pre-pressing structure and is placed in described first end-cap assembly and the second end Between cap assemblies, described shell is arranged on the outside of film core and connects described first end-cap assembly and the second end-cap assembly respectively；Cross During filter, material flow is after described material flow input port flows into, through relative with the second end-cap assembly and that put film core axial end depends on Secondary backward relative with the first end-cap assembly by each membrane filter unit and the film mandrel put to end motion, filtered purification fluid from Described purification fluid outlet is discharged.

Publication No. CN103657414A applied for by applicant, entitled " same end Inlet and outlet water separating and filtering film post and feed liquid thereof Reason method " patent documentation (calling list of references in the following text) disclose a kind of membrane filtration module, this membrane filtration module is through above-mentioned Mode carries out filtering；Additionally, the document it is also specifically disclosed that the film core pre-pressing structure of this membrane filtration module, described film core pretension Structure includes the nut being arranged on mandrel, and the axial pre tightening force applied by the nut on mandrel makes film core be axial compression state And be placed between the first end-cap assembly and the second end-cap assembly.

Applicant finds during the life-time service to above-mentioned membrane filtration module, the most after a period of operation this membrane filtration group Part arises that the problem that seepage and filter effect are deteriorated.

In order to probe into the reason that this problem occurs, applicant have employed multiple test instrunment and enters the operation work of membrane filtration module Row data monitoring, unrecoverable data is analyzed during contrast finding over time, is arranged on mandrel in film core pre-pressing structure Its pretightning force will be less than design pretightning force, again after fastening nut, membrane filtration after membrane filtration module works a period of time for nut Assembly just can recover normal operating conditions.

Applicant finds after test further, need to control 1 time/200 little to the fastening frequency of the nut being arranged on mandrel Time about, just it is avoided that and causes because pretightning force weakens membrane filtration module that the problem of seepage occurs, and in actual industrial production, Sewage disposal uses multiple membrane filtration module to match with other devices often, improves sewage treating efficiency and realizes automatization Control, thus cause in actual production high to the maintenance cost of multiple membrane filtration modules, greatly reduce membrane filtration module and make Convenience.

On the basis of the above, inventor finds after further test and research, cause that above-mentioned nut pretightning force weakens main because of Element is: owing to membrane filter unit is in axial compression state under the effect of film core pre-pressing structure, and in filter process, by In the effect of filtration pressure difference, fluid impingement force etc., easily there is less plastic deformation in membrane filter unit, thus causes film core pretension The axial compression of film core is affected by structure, once the axial compression state no longer keeping installing of film core, membrane filtration module In material flow and/or purify fluid seepage, blowby the most easily occur, thus have a strong impact on membrane filtration module sealing effectiveness and Filter effect.

Summary of the invention

For above-mentioned technical problem, can preferably ensure the film mandrel membrane filtration group to impaction state it is desirable to provide a kind of Part and film core pre-pressing structure thereof and parts peculiar.

The membrane filtration module of the present invention, pre-including shell, mandrel, film core, the first end-cap assembly, the second end-cap assembly, film core Locking structure and material flow input port and purify fluid outlet, described film core retainer plate is located on mandrel and by multiple membrane filter units Composition, the film core being made up of these membrane filter units is configured to axial compression state by film core pre-pressing structure and is placed in described the Between one end-cap assembly and the second end-cap assembly, described shell is arranged on the outside of film core and connects described first end-cap assembly respectively With the second end-cap assembly；During filtration, material flow is after described material flow input port flows into, through relative with the second end-cap assembly And the film core axial end put passes sequentially through that each membrane filter unit is backward relative with the first end-cap assembly and the film mandrel put is to end motion, Filtered purification fluid is discharged from described purification fluid outlet；Described film core pre-pressing structure has when filtering towards axial compression The floating type hold-down mechanism of the direction motion of film core.

Each membrane filter unit can be played the effect of fastening of floating by described floating type hold-down mechanism when film core filters, effectively Avoid film core because being caused the film core pre-pressing structure pretension to film core by the effect of filtration pressure difference, material flow impulsive force etc. for a long time The situation that power weakens, thus preferably ensure film core axial compression state, be greatly reduced membrane filtration module frequency of maintenance and Cause the risk factor of seal failure because film mandrel is affected to impaction state, improve the ease of use of membrane filtration module, Enable membrane filtration module to keep preferable strainability in a long time, reduce and produce and maintenance cost, do not increasing enterprise On the basis of too much cost, whole filtration, purification industry had important economic implications and environment protection significance.

For the film core pre-pressing structure of above-mentioned membrane filtration module, described film core retainer plate is located on mandrel and is made up of multiple membrane filter units, The film core being made up of these membrane filter units is configured to axial compression state by film core pre-pressing structure and is placed in the first end-cap assembly And between the second end-cap assembly；During filtration, material flow is through relative with the second end-cap assembly and that put film core axial end passes sequentially through The film mandrel that each membrane filter unit is backward relative with the first end-cap assembly and puts is to end motion；This film core pre-pressing structure has in filtration Time towards axial compression film core direction move floating type hold-down mechanism.

Preferably, described floating type hold-down mechanism can change adaptive towards the direction motion compressing film core with the state of film core.

Concrete, described floating type hold-down mechanism includes film mandrel to being pressed between the first end-cap assembly and the second end-cap assembly Retention mechanism, and be located between the second end-cap assembly and film core and can be driven by material flow when filtering and towards axial compression The floating member of the direction motion of film core.

Described floating member on the one hand can be on the premise of retention mechanism applies axial pre tightening force to film core, when filtering by raw material Fluid drives and compress film core further, make film core remain preferable axial compression state, and membrane filter unit filtered Time produce the compression of trace vertically and play compensating action, it is to avoid because of film core in filter process because its membrane filter unit is along axle To producing the compression of trace, and cause the situation that the pretightning force of retention mechanism weakens；The most described floating member also may be used Share the material flow pressure to film core, thus filtration pressure difference, material flow impact etc. can be alleviated to a certain extent to film core Active force, further reduce over the pretightning force impaired risks coefficient of retention mechanism during filter.

Preferably, described floating member is arranged with mandrel linkage, the overall direction fortune towards compression film core of floating member Neng Dai moving mandrel Dynamic, the axial compression state ensureing film core is had more preferable effect.

Optionally, described floating member and the unsettled setting of the second end-cap assembly.

Another kind of optional structure is that described floating member is seated on the second end-cap assembly.

Have for making the equally distributed shunting disk of material flow due to standing in membrane filtration module, and shunting disk is in existing film mistake Filter assembly is fixed with the second end-cap assembly and is connected, therefore in order to simplify structure, reduce the cost of manufacture of membrane filtration module, excellent Choosing, described floating member includes the shunting disk being sheathed on mandrel, described shunting disk be located at film core and the second end-cap assembly it Between and be flexibly connected, so while utilizing shunting disk that material flow is carried out uniform divided flows with the second end-cap assembly, so that it may straight Connect and utilize the driving force of material flow to drive shunting disk motion, thus under the effect of shunting disk, compress film core.

When using the structure of unsettled setting, the whole end face of shunting disk all can contact with material flow, therefore is conducive to increasing raw material stream The body active area to shunting disk, thus increase driving force.

And shunting disk is seated in the structure on the second end-cap assembly, the most advantageously in ensureing that shunting disk is put down relative to the radial direction of mandrel Weighing apparatus, and be further ensured that the radial equilibrium of the film core being arranged on shunting disk, thus advantageously in film core at the work of material flow Uniform with lower axially loaded, it is to avoid each membrane filter unit of film core causes trace inclination and distortion because axially loaded is uneven.

When shunting disk is seated on the second end-cap assembly, the preferred structure of shunting disk for above-mentioned membrane filtration module is, including Disk body, the side of described disk body is provided with fluid inlet hole, and the axial end face of disk body is provided with Fluid-exiting apertures, described fluid inlet hole and stream Body portals to connect and forms the split channel of side influent stream body.During use, material flow enters after split channel from stream through fluid inlet hole Body portals row to film core.The split channel of side influent stream body, it is possible to use the effect of the disk body wall above material flow convection cell inlet hole Try hard to recommend Moving plate Ti Dai moving mandrel axially movable, and compress film core further.

Further, described Fluid-exiting apertures is along the axially extending formation outlet fluid of disk body, and described fluid inlet hole is along disk body Extending radially to be formed at described outlet fluid fluid inlet channel, described fluid inlet channel passes through mutually with outlet fluid The split channel that logical formation cross section is L-shaped.Such structure fabrication is convenient, and the L-shaped split channel of cross section can also Enough material flow is played certain cushioning effect, thus is conducive to a certain extent reducing the material flow pressure to film core.

Preferably, for convenient processing, described fluid inlet channel is axially through the disk body axle head relative with Fluid-exiting apertures Face, i.e. arranges breach at the edge part of disk body end face that is relative with Fluid-exiting apertures and that put, utilize this breach and the second end-cap assembly it Between gap can be used as described fluid inlet channel.

Further, described outlet fluid includes the different epimere output channel of internal diameter size and connects the output of described epimere Passage and the hypomere output channel of fluid inlet channel.When the internal diameter of epimere output channel is less than the internal diameter of hypomere output channel, To a certain extent, be conducive to increasing material flow and to the active area of disk body wall thus play more preferable driving effect.

Preferably, the internal diameter of described epimere output channel is more than the internal diameter of hypomere output channel.So logical from fluid input when fluid Road is when hypomere output channel enters epimere output channel, and the speed of fluid will reduce, and the relative pressure of fluid will increased, Advantageously ensure that film core has higher filter efficiency.

Preferably, described fluid inlet hole is domed, and its simple in construction is easy to make.

Preferably, described fluid inlet hole and Fluid-exiting apertures are uniform along the circumference of disk body.Such structure can guarantee that material flow enters Also it is uniformly distributed after film core, thus is conducive to improving the overall utilization rate of membrane filter unit in film core and ensureing film core uniform force.

Preferably, it is described that described shunting disk is provided with the centre bore for being socketed, described fluid inlet hole and Fluid-exiting apertures deviation with mandrel Centre bore is arranged.

Preferably, described shunting disk is fixing with mandrel to be connected, and such as shunting disk and mandrel can be threaded connection fixing or use glue The mode such as connect is fixed.

Preferably, above-mentioned shunting disk and the attachment structure of mandrel, including shunting disk and mandrel, shape between described shunting disk and mandrel Become to have welded gaps and/or bevel for welding, at described welded gaps and/or bevel for welding, shunting disk is welded as a whole with mandrel. Use the structure being welded to connect, it is possible to make fixing more firmly between shunting disk and mandrel, be more beneficial for shunting disk at raw material stream Body drives Xia Dai moving mandrel to move towards the direction of axial compression film core, thus preferably ensures the axial compression state of film core.

Concrete, described shunting disk forms described welded gaps and/or welds slope in the most at least one end of described centre bore with mandrel Mouthful.

Further, described mandrel is provided with ladder shaft part, and described centre bore is provided with described ladder shaft part corresponding matching with to mandrel Forming the stage portion of axially location, shunting disk forms welded gaps at the big end of described stage portion with mandrel, and shunting disk is at described The small end in rank portion forms bevel for welding with mandrel.The outside diameter of described stage portion, more than the diameter of axle of ladder shaft part, so can rise To the effect of axially location and form described welded gaps, it is simple to welding.When reality is applied, shunting disk and mandrel are in described weldering Connect full weld at gap and bevel for welding, and weld seam must not be higher than mother metal.

For the welding tooling of described shunting disk Yu mandrel, including fixed part, described fixed part includes bracing frame；Limiting section, institute State limiting section include the first limit base that can coordinate with mandrel and be correspondingly arranged with described first limit base and can coordinate with shunting disk The second limit base, described first limit base and the second limit base be connected with support frame as described above respectively after described first limit base, Formed between second limit base and bracing frame and be available for shunting disk and working place that mandrel is welded to connect.This welding tooling simple in construction, The axiality of shunting disk and mandrel can be controlled more accurately, and ensure that welding operation is convenient.

For simplifying structure further, and make the easier for installation of mandrel and shunting disk, described first limit base and the second limit base It is separately positioned on the axial two ends of bracing frame.

Preferably, described second limit base includes that the second installing plate, described second installing plate are provided with and described shunting disk can be carried out axle Stopper slot to location；Described first limit base includes the first installing plate and the limit shaft sleeve that can coordinate with described mandrel, described the One installing plate be provided with vertically limit shaft sleeve axially can be positioned and can make the mandrel coordinated with limit shaft sleeve through after be connected point The stepped hole of flow table.When actual installation, only described stepped hole and the axiality of stopper slot and size, and limit shaft need to be ensured The precision of set can ensure the axiality after shunting disk and mandrel installation.By limit shaft sleeve and stopper slot respectively to mandrel and shunting The constraint of dish, it is possible to the precision after guarantee shunting disk welds with mandrel is higher.

Preferably, described second installing plate is provided with corresponding with described stepped hole and at least as one of described working place vertically The through hole divided.Offering of described through hole can ensure straight on the basis of not affecting the stopper slot axially location to shunting disk as far as possible Footpath is bigger, in order to welding operation.

Preferably, support frame as described above includes the many support rod members being connected between the first limit base and the second limit base, to guarantee The stabilized structure of whole welding tooling.Additionally, support frame as described above can also use engraved structure, only stabilized structure need to met On the basis of, it is ensured that leave the working place being easy to welding.

Use above-mentioned welding tooling to be welded and fixed with mandrel by shunting disk, the structural stability of shunting disk and mandrel can be improved greatly, Avoid using and be flexibly connected and cause shunting disk to produce certain rocking or tilt during compressing film core under material flow drives Deng.This welding tooling can use vertical or horizontal mode to put when reality is applied, when using vertical storing, preferably It is placed on workbench.

Optionally, described floating member also includes elastic compensation element.Described elastic compensation element can provide balancing force, it is to avoid Cause because of filtration retention mechanism occur loosen situation, and due to filter time material flow pressure be often in fluctuation status, Therefore elastic compensation element can also play the effect of bumper and absorbing shock.

Described elastic compensation element can be existing butterfly spring or wavy spring.

Further, described floating type hold-down mechanism be additionally provided with can floating member towards axial compression film core direction move time, with Mandrel or the second end-cap assembly keep the piston element of sliding connection；When described piston element and the second end-cap assembly keep sliding Dynamic when being connected, piston element is arranged with floating member and/or mandrel linkage.Described piston element can play sealing function.

Further, described piston element keeps sliding contact frictional fit with mandrel or the second end-cap assembly.

When film core pre-pressing structure has elastic compensation element, preferably elastic compensation element is located at piston element and the second end cap group Between part.

Preferably, described piston element includes and mandrel or the piston head of the second end-cap assembly holding sliding connection, Yi Jiyu The piston rod that described piston head connects, described piston head is provided with the groove coordinated with described mandrel.Such structure can also be the most square Just the location to mandrel.Described groove is preferably threaded connection fixing with mandrel.

When described elastic compensation element is wavy spring, described wavy spring can be sheathed on described piston rod, when film core is pre- When locking structure is not provided with elastic compensation element, described piston rod can be made to connect with screw threads for fastening respective outer side edges after the second end-cap assembly Connecing fixing, this screw threads for fastening structure is locking nut.

Optionally, described retention mechanism includes the many rod assemblies being connected between the first end-cap assembly and the second end-cap assembly, And respectively with described rod assembly and the screw threads for fastening structure that is connected through the mandrel of the first end-cap assembly.By arranging State the first end-cap assembly and the second end-cap assembly is capable of fixing shell and film core, the most again by many in rod assembly Root pull bar and screw threads for fastening structure, i.e. can ensure that the connection between shell, film core, the first end-cap assembly and the second end-cap assembly Fastness.

Although the retention mechanism using rod assembly to combine with screw threads for fastening structure can make whole membrane filtration module have good jail Solidity, but in actual use, use multiple membrane filtration module to match with other devices often due to sewage disposal, Improve sewage treating efficiency and realize Automated condtrol, being therefore accomplished by many pull bars when application, and many pull bars use not Rust steel is made, and cost is high, and fastness is not so good as carbon steel, uses carbon steel to make and the most easily corrodes, and it is distributed in whole membrane filtration The surrounding of assembly, makes the space occupied needed for whole membrane filtration module be greatly increased, brings much to the installation of membrane filtration module Inconvenience.

Therefore, in actual applications, another kind of optional structure is that described first end-cap assembly and the second end-cap assembly are sealed It is pressed on enclosure.Described first end-cap assembly and the second end-cap assembly are by being arranged on film core, the first end-cap assembly and second Shell outside end-cap assembly compresses and seals.The described retention mechanism of its film core pre-pressing structure preferably includes screw threads for fastening structure, core The end of the axial one end of axle connects described screw threads for fastening structure after the first end-cap assembly, the axial other end of mandrel and the second end Cap assemblies keeps slipper seal to connect.The membrane filtration module using this structure is non pull rod type structure, and this non pull rod type structure can Application reference people application, Publication No. CN104128094A, entitled " a kind of with end Inlet and outlet water separating and filtering film post " special Profit document housing and the first end-cap assembly and the concrete attachment structure of the second end-cap assembly.Described shell can have and the first end cap The inner chamber that assembly and the second end-cap assembly adapt, the first end-cap assembly and the second end-cap assembly are clamped to enclosure, and It is formed with cavity between outer casing inner wall and film core.The inwall of described shell and the first end-cap assembly and the lateral wall of the second end-cap assembly Between can by wedge, seal structure or other existing similar structures and carry out sealing and compress.

In actual applications, tunicle core pre-pressing structure axial compression membrane filtration between the first end-cap assembly and the second end-cap assembly Unit can use multiple existing structure；Preferably, described film core is by multiple membrane filter units being axially sequentially stacked along mandrel Composition, such structure is not only installed easy to make, and after each membrane filter unit tunicle core pre-pressing structure compresses vertically, Film core can be axially formed multiple filtration runner, thus obtains more preferable filter effect, and on the premise of film core size is certain, Also help the quantity increasing membrane filter unit, accordingly increase filter area, improve filter efficiency, and make filter effect more preferable.

Preferably, described membrane filter unit includes flow guiding disc and the diaphragm that several Zhang Yici is socketed on mandrel, at the most adjacent two One diaphragm is installed between flow guiding disc；Each flow guiding disc include flow guiding disc body and be located on described flow guiding disc body for mandrel The first centre bore coordinated, and deviate the first flow-guiding channel of described first centre bore, the side of each flow guiding disc body also sets There are the annular diversion cavity accommodating corresponding diaphragm, each annular diversion cavity and the first corresponding flow-guiding channel conducting；Each diaphragm includes diaphragm Body and being located on described diaphragm body for the second centre bore coordinated with mandrel, and deviate the second of this second centre bore and lead Circulation road；Each diaphragm body includes upper diaphragm, lower diaphragm and the cavity between upper diaphragm and lower diaphragm, described cavity and Two centre bore conductings；Be respectively equipped with sealing structure between each upper diaphragm with the inner edge of corresponding annular diversion cavity, each lower diaphragm with It is respectively equipped with sealing structure between the inner edge of corresponding annular diversion cavity；Described mandrel be provided with respectively with the second of each diaphragm in The flow-guiding structure of central hole conducting, described flow-guiding structure constitutes with cavity and second centre bore of each diaphragm and purifies fluid outlet The purification fluid conveying stream of conducting；First flow-guiding channel of each flow guiding disc and the second flow-guiding channel of each diaphragm are sequentially communicated composition Material flow conveying stream.

Further, if setting individual diaphragm projected area on the cross section of mandrel as A square metre, the external diameter of individual diaphragm is D rice, the diaphragm quantity in this membrane filtration module is that N opens, then:

Wherein, 250≤B≤320.

Wherein diaphragm projected area on the cross section of mandrel is A square metre, and projected area here is in this membrane filtration module The cross-sectional area of the second flow-guiding channel not including the second centre bore and make material flow pass through diaphragm, it is found by the applicant that in this projection When ratio between the number product of area and diaphragm and the area of a circle constituted with diaphragm external diameter is between 250 to 320, compared to Conventional film filter assemblies, the filter efficiency of the application membrane filtration module and filtration rejection all significantly improve, and create this area skill The beyond thought effect of art personnel.On the basis of utilizing floating type hold-down mechanism that each membrane filter unit is carried out floating type fastening, By selection and the combination of the several key parameters to diaphragm, it is more beneficial for ensureing that film core is in axially pressure in filter process all the time On the premise of tight state, filter area can be significantly increased, so that the filter efficiency of membrane filtration module is higher and filters rejection Unexpected good.

Further, whenWherein, during 250≤B≤320, the external diameter of each diaphragm is 0.2 to 0.4 meter；Film Diaphragm quantity in filter assemblies is 125 to 180, preferably selects for one.

Described first end-cap assembly include the first ring flange and the first sealing plate, described second end-cap assembly include the second ring flange and Second sealing plate；Between described film core is held in described first sealing plate and the second sealing plate, the first sealing plate is held in film Between core and the first ring flange, the second sealing plate is held between film core and the second ring flange, and shell is fixed on the first ring flange With second between ring flange, described mandrel is at least tightly connected with the first sealing plate；It is additionally provided with described on described first ring flange The material flow delivery outlet of material flow conveying stream conducting, described material flow delivery outlet, material flow input port and purification stream Body delivery outlet around the periphery setting of mandrel, is communicated with described purification fluid transportation flow on the first ring flange on the first sealing plate Road and the apocenosis passage of purification fluid outlet, be provided with material flow delivery outlet and material flow conveying stream in described shell The first passage of outfan conducting and second leading to the input of material flow input port and material flow conveying stream turns on Road.

Described apocenosis passage and horizontal plane angle are preferably in 5 °～60 °, and such structure can make discharge opeing effect more preferable.

Above-mentioned each membrane filtration module purifies the output of fluid both can use applied for by applicant Publication No. CN103657414A, Entitled " with end Inlet and outlet water separating and filtering film post and feed liquid processing method " patent documentation disclosed in have employed hollow core shaft Drainage structure, it is possible to use applicant application Application No. 201610226549.1, entitled " membrane filtration module " send out The drainage structure that have employed solid mandrel mentioned in bright patent application.

If described mandrel is solid shafting, the most each first centre bore and the second centre bore are provided with gap with mandrel matching part respectively, should Gap may be configured as 0.5 to 2 millimeter, and this gap can be as described flow-guiding structure.

Further, the lobe around this first centre bore circumferential array, adjacent lobe it are provided with in the first centre bore of each flow guiding disc Between there is gap, the outside circle of described lobe contacts cooperation with described mandrel, and described gap is then as the first centre bore and mandrel The gap of matching part.

Further, the width in the gap between described adjacent lobe is 1～3 millimeter.

Arrange lobe both to carry out radially positioning to film core by mandrel, purification fluid can be allowed again to smoothly pass in first Central hole, this lobe can be the plate profile structure with rectified action.

Described material flow, after material flow input port inputs, flows to material flow conveying stream, raw material stream by second channel Body is in this material flow conveying stream course of conveying, and material flow, after the split channel of shunting disk, can enter described annular and lead In stream chamber, flow between flow guiding disc and diaphragm, allow diaphragm that material flow is carried out abundant filtration treatment.After treatment former Stream body (or referred to as dope) enters first passage, flows out membrane filtration module after entering material flow delivery outlet along this passage.

Material flow is after diaphragm processes, and the purification fluid produced in the cavity on diaphragm body is along this cavity and described second The purification fluid conveying stream that centre bore is constituted, by purifying fluid outlet discharge membrane filtration module after apocenosis passage.Because Each annular diversion cavity with the first corresponding flow-guiding channel conducting, described material flow conveying stream is and the annular water conservancy diversion on flow guiding disc Chamber connection.Being respectively equipped with sealing structure between each upper diaphragm with the inner edge of corresponding annular diversion cavity, each lower diaphragm is with right It is respectively equipped with sealing structure between the inner edge of the annular diversion cavity answered, is to stop material flow to the first centre bore and second Flowing in centre bore direction, sealing structure here can be sealing ring.

Can be cracked on described flow guiding disc mouth, and diaphragm is provided with the breach adaptive with this sealing, and this sealing and breach are respectively formed institute State the first flow-guiding channel, the most just can realize above-mentioned material flow conveying stream, certainly, this material flow conveying stream be with Annular diversion cavity connection on flow guiding disc.

Described sealing and breach is opened, sealing and splitting at described flow guiding disc surface or annular diversion cavity end face or annular diversion cavity bottom surface At Kou, guide flow table two sides are turned up, are tilted respectively, are formed domatic, so include several axle along mandrel due to membrane filter unit To the flow guiding disc being socketed in successively on mandrel and diaphragm, therefore material flow helically can move along material flow conveying stream, in order to Carry out abundant filtration treatment with each diaphragm, thus reach good filter effect.

If described mandrel is hollow axle, the most described mandrel is hollow tubular, then be provided with each diaphragm on the tube wall of described mandrel The through hole that second centre bore turns on mandrel inner chamber, now, described through hole is then as described flow-guiding structure, the tube chamber conduct of mandrel Apocenosis passage, the axle head opening of mandrel as purifying fluid outlet, and without on the first ring flange and the first sealing plate respectively Described purification fluid outlet and apocenosis passage are set.Axial one end of described hollow tubular mandrel can be arranged to enclosed construction or Person is welded to connect with plug.Material flow is after diaphragm processes, and the purification fluid produced in the cavity on diaphragm body is along being somebody's turn to do Cavity and the purification fluid conveying stream of the through hole composition of described second centre bore and mandrel, pass through core after the tube chamber of mandrel The axle head opening of axle discharges membrane filtration module.

Further, each diaphragm is RO film or NF film.

RO is the abbreviation of English Reverse Osmosis membrane, and the Chinese meaning is reverse osmosis.The type of flow of general water It is to be flowed to high concentration by low concentration, after water once pressurizes, will be by high concentration flow to low concentration, that is so-called reverse osmosis principle: Owing to the aperture of RO film is 5/1000000ths (0.0001 microns) of hairline, general naked eyes cannot be seen, antibacterial, virus Being its 5000 times, therefore, the only mineral ion of hydrone and the useful human body of part can pass through, other impurity and heavy metal Discharged by waste pipe.The process of all desalinizations, and spaceman's waste water recycling device all uses the method, therefore RO film Also known as external high-tech " artificial kidney ".The most both at home and abroad, the military civil area of medical science, all take top RO film to carry out height Molecular filtration.

NF film is NF membrane, and nanofiltration is a kind of pressure-driven membrane separating process between reverse osmosis and ultrafiltration, NF membrane Pore diameter range is at several ran.Compared with other pressure-driven membrane separating process, occur later.NF membrane is mostly from instead Permeable membrane derivation, such as CA, CTA film, aromatic polyamide composite membrane and sulfonated polyether sulfone film etc..

Preferably, described first end-cap assembly is positioned at mandrel upper end, and the second end-cap assembly is positioned at the lower end of mandrel.

It should be noted that described purification fluid outlet and apocenosis passage can also be arranged on the second end-cap assembly place end；Institute State material flow input port and material flow delivery outlet can also be arranged on the second end-cap assembly place end.

Further, described retention mechanism also includes the screw threads for fastening structure being located at described second ring flange lower end.

Further, the screw threads for fastening structure coordinated with described mandrel preferably includes the first preload piece and nut, described first pretension Part lower surface through the first ring flange and the first sealing plate upper surface contact compression, described first preload piece upper end is upward through the One ring flange and and nut screw connection, described first preload piece upper end preferably employ double nut to top tighten to reach the most locking Purpose；The screw threads for fastening structure of the second ring flange lower end includes that the second preload piece and nut, described second preload piece are integrally provided in The lower section of the second ring flange, the upper surface of the second preload piece contacts compression, described second preload piece with the lower surface of the second ring flange And pass through screw lock between the second ring flange.The screw threads for fastening structure coordinated with rod assembly is preferably nut.

Described second ring flange and the second sealing plate can be fixed by screw threads for fastening structure, and this screw threads for fastening structure is preferably screw.

Described first preload piece is preferably multidiameter structure, this big end of multidiameter structure and the contact of the first sealing plate, described second pre- Tight part is preferably disc structure.Wherein, the contact area of the second preload piece and the second ring flange is preferably greater than the first preload piece and One sealing plate contact area, the screw threads for fastening structure of the screw threads for fastening structure on such first sealing plate and the second ring flange lower end The pressure produced, was conducive to providing more preferable pretightning force to film core along concentrating to mandrel week, and owing to described sealing structure is located at Between each upper diaphragm with the inner edge of corresponding annular diversion cavity, therefore such structure can also make upper diaphragm, lower diaphragm with corresponding Sealing property between the inner edge of annular diversion cavity is more preferable.

Below in conjunction with the detailed description of the invention of embodiment, the foregoing of the present invention is described in further detail again.But should not This is interpreted as, and the scope of the above-mentioned theme of the present invention is only limitted to Examples below.Without departing from the idea case in the present invention described above, The various replacements made according to ordinary skill knowledge and customary means or change, all should be included within the scope of the invention.

Accompanying drawing explanation

Fig. 1 is the first structural representation of the membrane filtration module in the specific embodiment of the invention with film core pre-pressing structure.

Fig. 2 is the second structural representation of the membrane filtration module in the specific embodiment of the invention with film core pre-pressing structure.

Fig. 3 is the third structural representation of the membrane filtration module in the specific embodiment of the invention with film core pre-pressing structure.

Fig. 4 is the 4th kind of structural representation of the membrane filtration module in the specific embodiment of the invention with film core pre-pressing structure.

Fig. 5 is the 5th kind of structural representation of the membrane filtration module in the specific embodiment of the invention with film core pre-pressing structure.

Fig. 6 is the schematic top plan view of shunting disk in Fig. 1 and Fig. 4.

Fig. 7 is the schematic front view of shunting disk in Fig. 2, Fig. 3 and Fig. 5.

Fig. 8 is the elevational schematic view of shunting disk in Fig. 2, Fig. 3 and Fig. 5.

Fig. 9 be in Fig. 1～Fig. 5 the welding tooling of shunting disk and mandrel at a kind of structural representation used under state.

Figure 10 is the structural representation of the second limit base in Fig. 9.

Figure 11 is the structural representation of piston element in Fig. 1 and Fig. 2.

Figure 12 is the structural representation of piston element in Fig. 3.

Figure 13 is the schematic top plan view of the first end-cap assembly in Fig. 1～Fig. 5.

Figure 14 be in Figure 13 the A-A of the first end-cap assembly to cross-sectional schematic.

Figure 15 is two flow guiding discs and the film core decomposing schematic representation of a diaphragm composition in Fig. 1～Fig. 5.

Figure 16 is the cross-sectional schematic of the film core of two flow guiding discs and a diaphragm composition in Fig. 1～Fig. 5.

Detailed description of the invention

Embodiment 1:

As shown in Fig. 1, Fig. 6, Fig. 9～Figure 11, Figure 13～Figure 16, membrane filtration module, including shell 100, mandrel 200, Film core the 300, first end-cap assembly the 410, second end-cap assembly 420, film core pre-pressing structure and material flow input port 510 and Purifying fluid outlet 520, described film core 300 is set on mandrel 200 and is made up of multiple membrane filter units, by these films The film core 300 of filter element composition is configured to axial compression state by film core pre-pressing structure and is placed in described first end-cap assembly 410 and second between end-cap assembly 420, and described shell 100 is arranged on the outside of film core 300 and connects described first end respectively Cap assemblies 410 and the second end-cap assembly 420；During filtration, material flow through described material flow input port 510 flow into after, warp Each membrane filter unit is passed sequentially through backward with the first end-cap assembly with the second end-cap assembly 420 film core 300 axial end that is relative and that put The film core 300 axial end motion that 410 put relatively, filtered purification fluid is discharged from described purification fluid outlet 520； Described film core pre-pressing structure has the floating type hold-down mechanism moved when filtering towards the direction of axial compression film core 300.

Described floating type hold-down mechanism includes film core 300 axial compression in the first end-cap assembly 410 and the second end-cap assembly 420 Between retention mechanism, and be located between the second end-cap assembly 420 and film core 300 and can filter time be driven by material flow And the floating member of the direction motion towards axial compression film core 300.

Described floating member on the one hand can on the premise of retention mechanism applies axial pre tightening force to film core 300, when filtering by Material flow drives and compresses film core 300 further, makes film core 300 remain preferable axial compression state, and to film mistake Filter unit produces the compression of trace vertically when filtering and plays compensating action, it is to avoid because of film core 300 in filter process because of Its membrane filter unit produces the compression of trace vertically, and causes the situation that the pretightning force of retention mechanism weakens；On the other hand Described floating member also can share the material flow pressure to film core 300, thus can alleviate to a certain extent filtration pressure difference, The active force to film core 300 such as material flow impact, further reduces over the pretightning force impaired risks of retention mechanism during filter Coefficient.

Described floating member includes the shunting disk 610 being sheathed on mandrel 200.

Described film core 300 is set on mandrel 200 and is made up of multiple membrane filter units being axially sequentially stacked along mandrel 200； Described membrane filter unit includes flow guiding disc 310 and the diaphragm 320 that several Zhang Yici is socketed on mandrel 200, at the most adjacent two One diaphragm 320 is installed between flow guiding disc 310；Each flow guiding disc 310 includes flow guiding disc body and is located at described flow guiding disc body Upper the first centre bore 311 for coordinating with mandrel 200, and deviate the first flow-guiding channel 312 of described first centre bore 311, Being additionally provided with the annular diversion cavity 313 accommodating corresponding diaphragm 320 on the side of each flow guiding disc body, each annular diversion cavity 313 is with right The first flow-guiding channel 312 answered turns on；Each diaphragm 320 include diaphragm body and be located on described diaphragm body for mandrel 200 The second centre bore 321 coordinated, and deviate the second flow-guiding channel 322 of this second centre bore 321；Each diaphragm body includes Diaphragm 323, lower diaphragm 324 and the cavity 325 between upper diaphragm 323 and lower diaphragm 324, described cavity 325 and second Centre bore 321 turns on；Sealing knot it is respectively equipped with between each upper diaphragm 323 with the inner edge 314 of corresponding annular diversion cavity 313 Structure 330, is respectively equipped with sealing structure 330 between each lower diaphragm 324 and the inner edge 314 of corresponding annular diversion cavity 313；Institute State mandrel 200 be provided with respectively with each diaphragm 320 second centre bore 321 conducting flow-guiding structure 201, described flow-guiding structure 201 are constituted and the purification stream purifying fluid outlet 520 conducting with the cavity 325 of each diaphragm 320 and the second centre bore 321 Body conveying stream 521；First flow-guiding channel 312 of each flow guiding disc 310 is with the second flow-guiding channel 322 of each diaphragm 320 successively Connection constitutes material flow conveying stream 511；Described shunting disk 610 is communicated with described material flow input port 510 and raw material The split channel of fluid conveying stream 511.

If setting individual diaphragm 320 projected area on the cross section of mandrel 200 as A square metre, the external diameter of individual diaphragm 320 For D rice, diaphragm 320 quantity in this membrane filtration module is that N opens, then:

Wherein, 250≤B≤320.

Wherein the diaphragm 320 projected area on the cross section of mandrel 200 is A square metre, and projected area here is in this film mistake Filter assembly does not include the second centre bore 321 and the cross-sectional area of the second flow-guiding channel 322 making material flow and passing through diaphragm 320, It is found by the applicant that the ratio between the number product of this projected area and diaphragm 320 and the area of a circle constituted with diaphragm 320 external diameter Time between 250 to 320, compared to conventional film filter assemblies, the filter efficiency of the application membrane filtration module and filtration rejection All significantly improve, create the beyond thought effect of those skilled in the art.Utilizing floating type hold-down mechanism to each membrane filtration On the basis of unit carries out floating type fastening, by selection and the combination of the several key parameters to diaphragm 320, it is more beneficial for protecting On the premise of card film core 300 is in axial compression state in filter process all the time, filter area can be significantly increased, so that The filter efficiency of membrane filtration module is higher and filtration rejection is unexpected good.

In the present embodiment, the overall cylindrical structure of described film core 300, so flow guiding disc 310 here can be disc-shaped structure, The described preferred shape of diaphragm 320 also should be suitable with the shape of this flow guiding disc 310, and the disc-shaped structure of this flow guiding disc 310 can To be that edge extends projection to both sides, the tangent plane making this flow guiding disc 310 is I-shaped, is the most just formed on flow guiding disc 310 The annular diversion cavity 313 stated.

The membrane filtration module of the present embodiment includes several flow guiding disc 310 being axially socketed in successively on mandrel 200 along mandrel 200 With diaphragm 320, the number of flow guiding disc 310 here can be more than 148, the number of diaphragm 320 can be 147 with On, described diaphragm 320 external diameter is 0.2 to 0.4 meter.Described upper diaphragm 323 and lower diaphragm 324 are RO film or NF film.

Described first end-cap assembly 410 includes the first ring flange 411 and the first sealing plate 412, described second end-cap assembly 420 Including the second ring flange 421 and the second sealing plate 422；Described film core 300 is held in described first sealing plate 412 and second Between sealing plate 422, the first sealing plate 412 is held between film core 300 and the first ring flange 411, the second sealing plate 422 Being held between film core 300 and the second ring flange 421, shell 100 is fixed on the first ring flange 411 and the second ring flange 421 Between, described mandrel 200 is tightly connected with the first sealing plate 412；It is additionally provided with and described raw material on described first ring flange 411 The material flow delivery outlet 530 of fluid conveying stream 511 conducting, described material flow delivery outlet 530, material flow input port 510 are arranged with purifying the fluid outlet 520 periphery around mandrel 200 on the first ring flange 411, the first sealing plate 412 On be communicated with described purification fluid conveying stream 521 and purify the apocenosis passage 522 of fluid outlet 520.Described discharge opeing is led to Road 522 and horizontal plane angle are 20 °～40 °.

It is provided with the of the outfan conducting of material flow delivery outlet 530 and material flow conveying stream 511 in described shell 100 One passage and the second channel that the input of material flow input port 510 with material flow conveying stream 511 is turned on.

Mandrel 200 described in the present embodiment is solid shafting, the first centre bore 311 and the second centre bore 321 respectively with mandrel 200 Matching part is provided with gap, and this gap may be configured as 1 to 1.5 millimeter, and this gap can be as described flow-guiding structure 201.Described First end-cap assembly 410 or the second end-cap assembly 420 are provided with cloth opening, this cloth opening and the outlet of described second channel End connection (concrete structure here refers to the structure in CN103657414A), also by material flow conveying stream 511 with First passage connects, and after mandrel 200 is set to solid circular shafts, whole membrane filtration module can be brought higher resistance to pressure, So relative to hollow shaft member, can increase on the basis of the effective filtration area not changing, even expanding film core 300 The number of membrane filter unit, improves the filtering efficiency of this membrane filtration module.

It is provided with the lobe 315 around this first centre bore 311 circumferential array, phase in first centre bore 311 of each flow guiding disc 310 There is gap between adjacent lobe 315, the outside circle of described lobe 315 contacts cooperation with described mandrel 200, and described gap is then made It it is the gap of the first centre bore 311 and mandrel 200 matching part.The width in the gap between described adjacent lobe 315 be 1.5～ 2.5 millimeter.This lobe 315 is the plate profile structure with rectified action.Described shunting disk 610 is unsettled with the second sealing plate 422 Arrange.

Described shunting disk 610 is provided with the centre bore 615 for being socketed with mandrel 200, and described split channel deviates described centre bore 615 and be evenly distributed, the Fluid-exiting apertures 612 of described split channel is axially through setting.

Above-mentioned shunting disk 610 and the attachment structure of mandrel 200, including shunting disk 610 and mandrel 200, described shunting disk 610 And it is formed with welded gaps and/or bevel for welding between mandrel 200, shunting disk 610 at described welded gaps and/or bevel for welding It is welded as a whole with mandrel 200.Described mandrel 200 is provided with ladder shaft part, and described centre bore 615 is provided with and described ladder shaft part Corresponding matching to form the stage portion of axially location to mandrel 200, and shunting disk 610 is held and mandrel 200 the big of described stage portion Forming welded gaps, shunting disk 610 forms bevel for welding at the small end of described stage portion with mandrel 200.

For the welding tooling of above-mentioned shunting disk 610 with mandrel 200, including fixed part, described fixed part includes bracing frame 710； Limiting section, described limiting section includes the first limit base 720 that can coordinate and right with described first limit base 720 with mandrel 200 The second limit base 730 that should arrange and can coordinate with shunting disk 610, described first limit base 720 and the second limit base 730 points Formed between described first limit base the 720, second limit base 730 and bracing frame 710 after not being connected with support frame as described above 710 It is available for the working place that shunting disk 610 is welded to connect with mandrel 200.

Described first limit base 720 and the second limit base 730 are separately positioned on the axial two ends of bracing frame 710.Described second limit Position seat 730 includes that the second installing plate 731, described second installing plate 731 are provided with and can axially position described shunting disk 610 Stopper slot 732；Described first limit base 720 includes the first installing plate 721 and the limit shaft that can coordinate with described mandrel 200 Set 722, described first installing plate 721 is provided with vertically and can axially position limit shaft sleeve 722 and can make and limit shaft sleeve The mandrel 200 that 722 coordinate is through the stepped hole 723 of rear connection shunting disk 610.

Described second installing plate 731 is provided with corresponding with described stepped hole 723 and at least as one of described working place vertically The through hole 733 divided.Support frame as described above 710 include many be connected between the first limit base 720 and the second limit base 730 Strut member.Threaded fastening can be used between described support rod member and the first installing plate 721 and the second installing plate 731.Use Above-mentioned welding tooling can control the axiality of shunting disk 610 and mandrel 200 more accurately, and ensures that welding operation is convenient, Structural stability after shunting disk 610 welds with mandrel 200 is good, can be prevented effectively from employing and be flexibly connected and cause shunting disk 610 Compress under material flow drives and produce certain rocking or inclination etc. during film core 200.

Described floating type hold-down mechanism is additionally provided with and can be compressed axially direction in shunting disk 610 band moving mandrel 200 along film core 300 and move Time, with the piston element 800 that the second sealing plate 422 keeps sliding connection, described piston element 800 includes close with second Shrouding 422 keeps the piston head 810 of sliding connection, and the piston rod 820 being connected with described piston head 810, described work Chock plug 810 is provided with and is threaded connection, with described mandrel 200, the groove 811 coordinated.Described floating member also includes being located at described Elastic compensation element 900 between piston element 800 and the second ring flange 421, described elastic compensation element 900 is waveform bullet Spring, described wavy spring is sheathed on described piston rod 820.Described retention mechanism includes that many are connected to the first ring flange 411 And the rod assembly 620 between the second ring flange 421, and respectively with described rod assembly 620 and through the first sealing plate 412 The screw threads for fastening structure that is connected of mandrel 200.Described retention mechanism also includes being located at described second ring flange 421 lower end Screw threads for fastening structure.

The screw threads for fastening structure coordinated with described mandrel 200 includes the first preload piece 631 and nut, the second ring flange 421 lower end Screw threads for fastening structure include the second preload piece 632 and nut；Described first preload piece 631 lower surface passes the first ring flange 411 Contact compression with the upper surface of the first sealing plate 422, described first preload piece 631 upper end is upward through the first ring flange 411 also With nut screw connection, described first preload piece 631 upper end uses double nut to pushing up the purpose tightening to reach the most locking；Described Second preload piece 632 is integrally provided in the lower section of the second ring flange 421, the upper surface of the second preload piece 632 and the second ring flange The lower surface contact of 421 compresses, and passes through screw lock between described second preload piece 632 and the second ring flange 421.With pull bar The screw threads for fastening structure that assembly 620 coordinates is nut.Described second ring flange 421 can be tight by screw thread with the second sealing plate 422 Fixing structure is fixed, and this screw threads for fastening structure is screw.

Described first preload piece 631 is multidiameter structure, and this big end of multidiameter structure and the first sealing plate 412 contact, described Two preload pieces 632 are disc structure.Wherein, the second preload piece 632 is pre-more than first with the contact area of the second ring flange 421 Tight part 631 and the contact area of the first sealing plate 412, the screw threads for fastening structure on such first sealing plate 412 and the second flange The pressure that the screw threads for fastening structure of dish 421 lower end produces is concentrated to 200 weeks edges of mandrel, is conducive to providing more preferable to film core 300 Pretightning force, and owing to described sealing structure 330 is located at the inner edge 314 of each upper diaphragm 323 and corresponding annular diversion cavity 313 Between, therefore such structure can also make the inner edge 314 of upper diaphragm 323, lower diaphragm 324 and corresponding annular diversion cavity 313 Between sealing property more preferable.

Described material flow, after material flow input port 510 inputs, flows to material flow conveying stream 511 by second channel, Material flow is in this material flow conveying stream 511 course of conveying, and material flow, after the split channel of shunting disk, can enter In described annular diversion cavity 313, flow between flow guiding disc 310 and diaphragm 320, allow diaphragm 320 that material flow to be filled Divide filtration treatment.Material flow (or referred to as dope) after treatment enters first passage, enters material flow along this passage Membrane filtration module is flowed out after delivery outlet 530.

Material flow is after diaphragm 320 processes, and the purification fluid produced in the cavity 325 on diaphragm body is along this cavity 325 The purification fluid conveying stream 521 constituted with described second centre bore 321, by purifying fluid output after apocenosis passage 522 Mouth 520 discharges membrane filtration modules.Because each annular diversion cavity 313 turns on the first corresponding flow-guiding channel 312, described raw material Fluid conveying stream 511 is to connect with the annular diversion cavity 313 on flow guiding disc 310.At each upper diaphragm 323 and corresponding ring Sealing structure 330, each lower diaphragm 324 and corresponding annular diversion cavity it is respectively equipped with between the inner edge 314 of shape diversion cavity 313 It is respectively equipped with sealing structure 330 between the inner edge 314 of 313, is to stop material flow to the first centre bore 311 and second Flowing in centre bore 321 direction, sealing structure 330 here can be sealing ring.

Can be cracked on this flow guiding disc 310 mouth, and diaphragm 320 is provided with the breach adaptive with this sealing, and this sealing and breach are equal Form described first flow-guiding channel 312, the most just can realize above-mentioned material flow conveying stream 511, certainly, this material flow Conveying stream 511 is to connect with the annular diversion cavity 313 on flow guiding disc 310.

Flow guiding disc 310 surface or annular diversion cavity 313 end face or annular diversion cavity 313 bottom surface open described sealing and breach, At sealing and breach, guide flow table 310 two sides are turned up, are tilted respectively, are formed domatic, so include number due to membrane filter unit The individual flow guiding disc 310 being axially socketed in successively on mandrel 200 along mandrel 200 and diaphragm 320, so material flow can be along former Stream body conveying stream 511 helically moves, and to utilize each diaphragm to carry out abundant filtration treatment, thus reaches well to filter effect Really.In Figure 15, the direction of arrow is material flow flow direction.

Embodiment 2:

Embodiment 2 is roughly the same with the membrane filtration module structure of embodiment 1, but difference is: purify fluid in the present embodiment Output uses Publication No. CN103657414A of applicant's application, entitled " same end Inlet and outlet water separating and filtering film post and feed liquid thereof Processing method " patent documentation disclosed in the drainage structure of hollow core shaft 200.That is: described mandrel 200 is in hollow tubular, Mandrel 200 is provided with the through hole (not shown) of the second centre bore 321 of each diaphragm 320 with the conducting of mandrel 200 inner chamber, this Time, described through hole is then as described flow-guiding structure 201, and the tube chamber of mandrel 200 is as apocenosis passage 522, the axle head of mandrel 200 Opening is as purifying fluid outlet 520, and described without being respectively provided with on the first ring flange 411 and the first sealing plate 412 Purify fluid outlet 520 and apocenosis passage 522.

Axial one end of described hollow tubular mandrel 200 can be arranged to enclosed construction or be welded to connect with plug.Material flow After diaphragm 320 processes, the purification fluid produced in the cavity 325 on diaphragm body is along this cavity 325 and described second The purification fluid conveying stream 521 that the through hole of centre bore 321 and mandrel 200 is constituted, passes through core after the tube chamber of mandrel 200 The axle head opening of axle 200 discharges membrane filtration module.

Embodiment 3:

As shown in Fig. 2, Fig. 7 and Fig. 8, embodiment 3 is roughly the same with the membrane filtration module structure of embodiment 1, but difference exists In: described shunting disk 610 is seated on the second sealing plate 422 of the second end-cap assembly 420, such structure advantageously in Ensure that shunting disk 610 keeps radial equilibrium relative to mandrel 200, and be further ensured that the film core 300 being arranged on shunting disk 610 Radial equilibrium, thus advantageously uniform in film core 300 axially loaded under the effect of material flow, it is to avoid film core 300 because of Axially loaded is uneven and causes trace inclination and distortion.And the split channel of side influent stream body, it is possible to use material flow convection cell enters The active force of the disk body wall above hole 611 promotes disk body to drive mandrel 200 axially movable, and compresses film core 300 further.

This shunting disk 610 includes that disk body, the side of described disk body are provided with fluid inlet hole 611, and the axial end face of disk body is provided with stream Body portals 612, and described fluid inlet hole 611 and Fluid-exiting apertures 612 connect and form the split channel of side influent stream body.During use, Material flow after fluid inlet hole 611 enters split channel from Fluid-exiting apertures 612 row to film core.Described fluid inlet hole 611 is in arch Shape.Fluid inlet hole 611 and Fluid-exiting apertures 612 are uniform along the circumference of disk body.

Described Fluid-exiting apertures 612 is along the axially extending formation outlet fluid 614 of disk body, and described fluid inlet hole 611 is along disk body Extend radially at described outlet fluid 614 formed fluid inlet channel 613, described fluid inlet channel 613 and stream Body output channel 614 connects and forms the split channel that cross section is L-shaped.Such structure fabrication is convenient, and cross section in Material flow can also be played certain cushioning effect by the split channel of L-shaped, thus is conducive to a certain extent reducing raw material The fluid pressure to film core 300.

Described fluid inlet channel 613 axially penetrates through the disk body axial end relative with Fluid-exiting apertures 612, i.e. with Fluid-exiting apertures 612 The edge part of the disk body end face relatively put arranges breach 616, utilizes the gap between this breach 616 and second sealing plate 422 Can be used as described fluid inlet channel 613.

Described outlet fluid 614 include the different epimere output channel of internal diameter size and connect described epimere output channel with The hypomere output channel of fluid inlet channel 613.Wherein, the internal diameter of described epimere output channel is more than the interior of hypomere output channel Footpath.So when fluid enters epimere output channel from fluid inlet channel 613 through hypomere output channel, the speed of fluid will subtract Little, and the relative pressure of fluid will increased, and advantageously ensure that film core 300 has higher filter efficiency.

Described shunting disk 610 is provided with the centre bore 615 for being socketed, described fluid inlet hole 611 and Fluid-exiting apertures with mandrel 200 612 deviate described centre bore 615 is arranged.Membrane filtration module in the present embodiment in a non-operative state, its piston element 800 The upper surface of middle piston head 810 is not higher than the upper surface of the second sealing plate 422.

This shunting disk 610 can also use in embodiment 1 welding tooling as shown in Figure 9 and Figure 10 to weld with mandrel 200.

Embodiment 4:

As shown in Fig. 3 and Figure 12, embodiment 4 is roughly the same with the structure of embodiment 3, and described shunting disk 610 is seated in second On second sealing plate 422 of end-cap assembly 420, but difference is: in described film core pre-pressing structure, floating member does not include elasticity Compensating element, 900.Sliding connection, piston head is kept between piston head 810 and the mandrel 200 of described piston element 800 It is preferably provided with potted component between 810 and mandrel 200 and keeps sliding contact frictional fit.Further, the present embodiment is not provided with Second preload piece 632, utilizes the piston rod 810 second sealing plate 422 through the second end-cap assembly 420 of piston element 800 Being connected with screw threads for fastening respective outer side edges with after the second ring flange 421, this screw threads for fastening structure is locking nut, described locking nut Compression is contacted with the lower surface of the second ring flange 421.

Embodiment 5:

As shown in Figure 4, embodiment 5 is roughly the same with the membrane filtration module structure of embodiment 1, but difference is: described first It is internal that end-cap assembly 410 and the second end-cap assembly 420 are pressed on shell 100 by sealing, the most described first end-cap assembly 410 He Second end-cap assembly 420 is by being arranged on outside film core the 300, first end-cap assembly 410 and the second end-cap assembly 420 outside Shell 100 compresses and seals.This membrane filtration module is without Tiebar structure, and this non pull rod type structure specifically refers to applicant's application, Publication No. CN104128094A, entitled " a kind of with end Inlet and outlet water separating and filtering film post " patent documentation housing 100 with First end-cap assembly 410 and the attachment structure of the second end-cap assembly 420.Described shell 100 has and the first end-cap assembly 410 The inner chamber adapted with the second end-cap assembly 420, the first end-cap assembly 410 and the second end-cap assembly 420 are clamped to shell 100 Inside, and it is formed with cavity between shell 100 inwall and film core 200.The inwall of described shell 100 and the first end-cap assembly 410 and second end-cap assembly 420 lateral wall between can by wedge, seal structure or other existing similar structures and carry out close Envelope compresses.

The described retention mechanism of its film core pre-pressing structure includes screw threads for fastening structure, and the end of the axial one end of mandrel 200 passes first Connecting described screw threads for fastening structure after sealing plate 412, the axial other end of mandrel 200 and the second sealing plate 422 keep slip close Envelope connects.Being provided with potted component between described mandrel 200 and the second sealing plate 422, described potted component is preferably sealing ring. Its floating type hold-down mechanism does not include that piston element 800, described floating member do not include elastic compensation element 900.

Described second ring flange 421 lower end can be not provided with described second preload piece 632, the second ring flange 421 and the second sealing plate 422 are fixed by screw threads for fastening structure, and this screw threads for fastening structure is screw.

Material flow is after material flow input port 510 inputs, and the cavity between shell 100 and film core 200 can be as described the Two passages, flow to material flow conveying stream 511 for material flow, and material flow carries at this material flow conveyance fluid 511 During, material flow, after the split channel of shunting disk, can enter in described annular diversion cavity 313, flow guiding disc 310 with Flow between diaphragm 320, allow diaphragm 320 that material flow is carried out abundant filtration treatment.Wherein, material flow is through shunting During dish 610, shunting disk can be driven to drive the mandrel being welded as a whole therewith to move upward, thus compress film core further, The first preload piece 631 being located on the first sealing plate 412 and nut is avoided to occur to loosen.Material flow after treatment (or It is referred to as dope) enter first passage, flow out membrane filtration module after entering material flow delivery outlet 530 along this passage.

Embodiment 6:

Embodiment 6 is roughly the same with the membrane filtration module structure of embodiment 5, and limits the most another of described mandrel 200 further One end and the second sealing plate 422 keep sliding contact frictional fit.

Embodiment 7:

Embodiment 7 is roughly the same with the membrane filtration module structure of embodiment 5, but difference is: described floating type hold-down mechanism is also Be provided with can shunting disk 610 band moving mandrel 200 along film core 300 be compressed axially direction move time, keep with the second sealing plate 422 The piston element 800 of sliding connection, described piston element 800 includes keeping sliding connection with the second sealing plate 422 Piston head 810, and the piston rod 820 being connected with described piston head 810, described piston head 810 is provided with and described mandrel 200 grooves 811 being threaded connection cooperation.

Described floating member also includes the elastic compensation element 900 being located between described piston element 800 and the second ring flange 421, Described elastic compensation element 900 is wavy spring, and described wavy spring is sheathed on described piston rod 820.

Described retention mechanism may also include the screw threads for fastening structure being located at described second ring flange 421 lower end.This screw threads for fastening structure Including the second preload piece 632 and nut；Described second preload piece 632 is integrally provided in the lower section of the second ring flange 421, and second The upper surface of preload piece 632 contacts compression, described second preload piece 632 and the second flange with the lower surface of the second ring flange 421 Screw lock is passed through between dish 421.Described second ring flange 421 can be fixed by screw threads for fastening structure with the second sealing plate 422, This screw threads for fastening structure is screw.

Described second preload piece 632 is disc structure.Wherein, the second preload piece 632 and contact area of the second ring flange 421 More than the first preload piece 631 and contact area of the first sealing plate 412, the screw threads for fastening structure on such first sealing plate 412 The pressure produced with the screw threads for fastening structure of the second ring flange 421 lower end is concentrated to 200 weeks edges of mandrel, is conducive to film core 300 More preferable pretightning force is provided, and owing to described sealing structure 330 is located at each upper diaphragm 323 and corresponding annular diversion cavity 313 Inner edge 314 between, therefore such structure can also make upper diaphragm 323, lower diaphragm 324 and corresponding annular diversion cavity 313 Inner edge 314 between sealing property more preferable.

In the present embodiment similar to Example 1 to arranging of piston element 800 and elastic compensation element 900.

Embodiment 8:

As shown in Fig. 5, Fig. 7 and Fig. 8, embodiment 8 is roughly the same with the membrane filtration module structure of embodiment 5, but difference exists In: described shunting disk 610 is seated on the second sealing plate 422 of the second end-cap assembly 420, such structure advantageously in Ensure that shunting disk 610 keeps radial equilibrium relative to mandrel 200, and be further ensured that the film core 300 being arranged on shunting disk 610 Radial equilibrium, thus advantageously uniform in film core 300 axially loaded under the effect of material flow, it is to avoid film core 300 because of Axially loaded is uneven and causes inclination and distortion.And the split channel of side influent stream body, it is possible to use material flow convection cell inlet hole 611 The active force of the disk body wall of top promotes disk body to drive mandrel 200 axially movable, and compresses film core 300 further.

Described shunting disk 610 is provided with the centre bore 615 for being socketed, described fluid inlet hole 611 and Fluid-exiting apertures with mandrel 200 612 deviate described centre bore 615 is arranged.

Shunting disk 610 and mandrel 200 can also use in embodiment 1 Welder as shown in Figure 9 and Figure 10 in the present embodiment Put into row welding.

Embodiment 9:

Embodiment 9 is roughly the same with the membrane filtration module structure of embodiment 8, but difference is: described floating type hold-down mechanism sets Have can shunting disk 610 band moving mandrel 200 along film core 300 be compressed axially direction move time, keep sliding with the second sealing plate 422 The dynamic piston element 800 being connected, described piston element 800 includes keeping sliding connection with the second sealing plate 422 Piston head 810, and the piston rod 820 being connected with described piston head 810, described piston head 810 is provided with and described mandrel 200 It is threaded connection the groove 811 of cooperation.

It is provided with elastic compensation element 900, described elastic compensation element 900 between described piston element 800 and the second ring flange 421 For wavy spring, described wavy spring is sheathed on described piston rod 820.

In a non-operative state, in its piston element 800, the upper surface of piston head 810 is the highest for membrane filtration module in the present embodiment Upper surface in the second sealing plate 422.

In the present embodiment, the setting to piston element 800 and elastic compensation element 900 can be similar to Example 1.

Embodiment 10:

Embodiment 10 is roughly the same with the structure of the membrane filtration module of embodiment 9, and described shunting disk 610 is seated in the second end cap group On second sealing plate 422 of part 420, but difference is: in described film core pre-pressing structure, floating member does not include elastic compensating unit Part 900.The piston head 810 of described piston element 800 keeps slipper seal to be connected with mandrel 200.Further, in the present embodiment It is not provided with the second preload piece 632, utilizes the piston rod 810 second sealing through the second end-cap assembly 420 of piston element 800 Being connected with screw threads for fastening respective outer side edges after plate 422 and the second ring flange 421, this screw threads for fastening structure is locking nut, described lock The lower surface contact of jack panel and the second ring flange 421 compresses.

In the present embodiment, the setting to piston element 800 can be similar to Example 3.

Below, by contrast test, beneficial effects of the present invention is described in detail.

(1) maintenance period test

The membrane filtration module of conventional film filter assemblies and embodiment 1～10 in different time points to being located on the first end-cap assembly 410 The maintenance result of screw threads for fastening structure as shown in table 1.

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Table 1:

Being learnt by contrast test: during membrane filtration module persistently uses, in embodiment 1～10, membrane filtration module is compared For conventional film filter assemblies, just needing to be serviced after membrane filtration module uses 1000 hours, its maintenance period significantly prolongs Long；In embodiment 1～10, membrane filtration module effectively avoids film core 300 in filter process by arranging floating type hold-down mechanism The affected situation of axial compression state, greatly improves the overall fastening reliability of membrane filtration module and ease for maintenance, energy Production and maintenance cost are enough greatly reduced.

(2) sealing property test

Conventional film filter assemblies and the membrane filtration module of embodiment 1～10, in integral sealing situation such as table 2 institute of different time points Show.

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Table 2:

Being learnt by contrast test: during membrane filtration module persistently uses, conventional film filter assemblies is using 200 hours Time the problem of seal failure has occurred the most, and the membrane filtration module of embodiment 1～10 is using 1000 hours, just occurs sealing idol The problem (such as: in three retests, for once finding seal failure) that you lost efficacy；In different time points, implement The overall sealing performance of example 1～10 membrane filtration module is superior to conventional film filter assemblies, it is possible to improve membrane filtration module greatly Dependability, and can ensure that membrane filtration module has more preferable strainability in a long time, reduce the most accordingly simultaneously Maintenance times to membrane filtration module, has important economic implications and environment protection significance to enterprise and whole industry.

Claims

1. film core pre-pressing structure, described film core (300) is set in mandrel (200) and above and is made up of multiple membrane filter units, by The film core (300) of these membrane filter units composition is configured to axial compression state by film core pre-pressing structure and is placed in the first end cap Between assembly (410) and the second end-cap assembly (420)；During filtration, material flow is through relative with the second end-cap assembly (420) And film core (300) axial end put passes sequentially through that each membrane filter unit is backward relative with the first end-cap assembly (410) and the film put Core (300) axial end moves, it is characterised in that: this film core pre-pressing structure has when filtering towards axial compression film core (300) Direction motion floating type hold-down mechanism, described floating type hold-down mechanism includes film core (300) axial compression in the first end cap Retention mechanism between assembly (410) and the second end-cap assembly (420), and it is located at the second end-cap assembly (420) and film core (300) between and can drive by material flow when filtering and the floating member that moves towards the direction of axial compression film core (300), Described floating member and the second end-cap assembly (420) unsettled setting.

2. film core pre-pressing structure as claimed in claim 1, it is characterised in that: described floating member is for being sheathed on mandrel (200) On shunting disk (610).

3. film core pre-pressing structure as claimed in claim 2, it is characterised in that: described shunting disk (610) and mandrel (200) Fixing connection.

4. film core pre-pressing structure as claimed in claim 1, it is characterised in that: described floating type hold-down mechanism is additionally provided with can be floating When dynamic component moves towards the direction of axial compression film core (300), keep sliding with mandrel (200) or the second end-cap assembly (420) The dynamic piston element (800) being connected；When described piston element (800) and the second end-cap assembly (420) keep slip to join When closing connection, piston element (800) is arranged with floating member and/or mandrel (200) linkage.

5. film core pre-pressing structure as claimed in claim 4, it is characterised in that: described piston element (800) and mandrel (200) Or second end-cap assembly (420) keep sliding contact frictional fit.

6. film core pre-pressing structure as claimed in claim 4, it is characterised in that: described piston element (800) includes and mandrel (200) or the second end-cap assembly (420) keep sliding connection piston head (810), and with described piston head (810) The piston rod (820) connected, described piston head (810) is provided with the groove (811) coordinated with described mandrel (200).

7. film core pre-pressing structure as claimed in claim 1, it is characterised in that: described retention mechanism includes that many are connected to first Rod assembly (620) between ring flange (411) and the second ring flange (421), and respectively with described rod assembly (620) The screw threads for fastening structure being connected with the mandrel (200) through the first sealing plate (412).

8. film core pre-pressing structure as claimed in claim 1, it is characterised in that: described retention mechanism includes screw threads for fastening structure, The end of mandrel (200) axially one end connects described screw threads for fastening structure, mandrel (200) afterwards through the first end-cap assembly (410) The axial other end and the second end-cap assembly (420) keep slipper seal connect.

9. film core pre-pressing structure as claimed in claim 8, it is characterised in that: the axial other end of described mandrel (200) with Second end-cap assembly (420) keeps sliding contact frictional fit.

10. the film core pre-pressing structure as described in one of claim 1 to 9, it is characterised in that: described first end-cap assembly (410) Including the first ring flange (411) and the first sealing plate (412), described second end-cap assembly (420) includes the second ring flange (421) With the second sealing plate (422)；Described film core (300) is held in described first sealing plate (412) and the second sealing plate (422) Between, the first sealing plate (412) is held between film core (300) and the first ring flange (411), the second sealing plate (422) Be held between film core (300) and the second ring flange (421), described mandrel (200) at least with the first sealing plate (412) It is tightly connected.