CN108704847A - Compact aperture controlled fluid screening technique based on magnetostriction materials and device - Google Patents

Compact aperture controlled fluid screening technique based on magnetostriction materials and device Download PDF

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Publication number
CN108704847A
CN108704847A CN201810243026.7A CN201810243026A CN108704847A CN 108704847 A CN108704847 A CN 108704847A CN 201810243026 A CN201810243026 A CN 201810243026A CN 108704847 A CN108704847 A CN 108704847A
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China
Prior art keywords
magnetostriction materials
sieve
fluid
magnetic
separating sieve
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CN201810243026.7A
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CN108704847B (en
Inventor
谢磊
廖昌荣
陈仙
张红辉
寿梦杰
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Chongqing University
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Chongqing University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4636Regulation of screen apertures

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  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The compact aperture controlled fluid screening technique and its device, wherein method that the invention discloses a kind of based on magnetostriction materials include the following steps:s1:Separating sieve is made using magnetostriction materials;s2:The separating sieve is embedded in the high magnetic conduction in-core that electromagnet is located at coil inside, and the magnetic field that direction initialization sets intensity is applied to the separating sieve using the electromagnet, so that magnetostriction materials is occurred flexible to adjust the size of the sieve pore of the separating sieve;s3:Fluid to be screened is set to flow through the sieve pore;Wherein, screening plant includes separating sieve and magnetic field generation device;At least side hole wall of the sieve pore of the separating sieve makes for magnetostriction materials;The magnetic field generation device includes making magnetostriction materials occur to stretch to adjust the electromagnet of the size of the sieve pore of the separating sieve for applying controllable magnetic field to the separating sieve;The present invention can realize that slot size is controllable between nanometer~micro-meter scale;And the adjustable range of screen size can be greatly improved.

Description

Compact aperture controlled fluid screening technique based on magnetostriction materials and device
Technical field
The present invention relates to fluids to screen field, specifically a kind of compact aperture controlled fluid based on magnetostriction materials Screening technique and device.
Background technology
In industrial and agricultural production and life, it is often necessary to the fluid mixture for including different-grain diameter substance is screened, To extract or remove wherein specific ingredient.If PM2.5 (diameter≤2.5 μm) fine particles in atmosphere pollution are to air matter Amount and visibility etc. have important influence, and compared with thicker Atmospheric particulates, fine particle grain size is small, rich in largely having Poison, harmful substance, to Health Impact bigger, therefore usually need to be filtered the PM2.5 fine particles of the interior space Purification.Equally, it is often also required to be filtered purification to different-grain diameter mixture liquid in industrial and agricultural production.But it is traditional Corresponding pore size filter is arranged generally be directed to specified particle diameter object in physical cleaning method, is realized finally by purification method step by step Screening.The size of existing screening plant, the aperture of sieve pore is fixed, therefore the screening for scale between nanometer~micron Object can not adaptively adjust the size of sieve pore according to its size.
There is magnetostriction materials magnetostrictive effect, i.e. its length can stretch with the variation of residing magnetic field intensity. Wherein, some giant magnetostrictive materials, as Tb-Dy-Fe systems alloy can realize the mangneto of 1500~2000ppm (hundred a ten thousandths) The telescopic displacement range, it can be achieved that 0.5nm to 100 μm is strained, and prodigious thrust can be generated.
On the other hand, generally use electromagnet applies magnetic field to drive it to stretch to magnetostriction materials in the prior art Contracting.And existing electromagnet is difficult to provide enough driving magnetic field intensity, cause magnetostriction materials realize flexible range compared with It is small.
Therefore, magnetostriction materials can be utilized in nanometer to the characteristic of the magnetostrictive strain between micron, invention is a kind of It is compact-sized and can realize that slot size is controllable a kind of based on magnetostriction materials between nanometer~micro-meter scale Compact aperture controlled fluid screening technique and device.
Invention content
In view of this, the purpose of the present invention is overcoming defect in the prior art, provide a kind of compact-sized and can Realize a kind of controllable compact aperture controllable flow based on magnetostriction materials of the slot size between nanometer~micro-meter scale Body screening technique and device.
The compact aperture controlled fluid screening technique based on magnetostriction materials of the present invention, includes the following steps s1: Separating sieve is made using magnetostriction materials;s2:The separating sieve is embedded in the high magnetic conduction core that electromagnet is located at coil inside It is interior, and the magnetic field that direction initialization sets intensity is applied to the separating sieve using the electromagnet, make magnetostriction materials It stretches to adjust the size of the sieve pore of the separating sieve;s3:Fluid to be screened is set to flow through the sieve pore;
The compact aperture controlled fluid screening technique based on magnetostriction materials of the present invention, further includes step s4:Profit The sieve pore is flowed counterflow through with cleaning fluid, the particulate matter of the sieve pore is jammed in removal;s5:It repeats alternately to implement the step Rapid s3 and s4, until all fluids to be screened complete screening;
Further, it controls fluid to be screened and repeatedly flows through the sieve pore, and gradually reduce the aperture of the sieve pore;
Further, the precompression perpendicular to magnetic direction is applied to the magnetostriction materials, is stretched with increasing the mangneto Controllable magneto-strain of the compression material on magnetic direction;
The invention also discloses a kind of compact aperture controlled fluid screening plant based on magnetostriction materials, including point Choosing sieve and magnetic field generation device;At least side hole wall of the sieve pore of the separating sieve makes for magnetostriction materials;The magnetic field Generation device includes making magnetostriction materials occur to stretch to adjust the sorting for applying controllable magnetic field to the separating sieve The electromagnet of the size of the sieve pore of sieve;The separating sieve is embedded in electromagnet and is located in the magnetic core of coil inside;
Further, the separating sieve includes non-magnetic rigid mount;The non-magnetic rigid mount is logical equipped with several fluids Road;The fluid channel inner wall is equipped with the magnetostrictor that magnetostriction materials make, to constitute controllable sieve pore;It is described non-to lead Magnetic rigidity bearing applies precompression along the direction perpendicular to magnetic field to the magnetostrictor;
Further, the magnetic core is " day " font section, and the coil is wound in the middle part of magnetic core;
Further, the non-magnetic rigid mount is i shaped cross section, and fluid channel is set to the web of I-shaped structure Interior, the both ends of the high magnetic conduction core are respectively embedded into the groove of I-shaped structure both sides;
The controllable micro-nano fluid screening plant in the size tunable aperture based on magnetostriction materials of the present invention further includes The corresponding front end runner being connected to in the front-end and back-end of the fluid channel and rear end runner respectively;The front end runner is equipped with The controllable fluid inlet to be screened of opening and closing and cleaning fluid outlet;The rear end runner is equipped with the controllable fluid to be screened of opening and closing and goes out Mouth and cleaning fluid entrance;
Further, non-magnetic partition board is equipped between the electromagnetic coil and non-magnetic rigid mount.
The beneficial effects of the invention are as follows:The compact aperture controlled fluid screening side based on magnetostriction materials of the present invention Method makes separating sieve using magnetostriction materials, and the sieve pore of separating sieve should be formed on magnetostriction materials, or mangneto is stretched Compression material is arranged in sieve pore;Then the magnetic field that direction initialization sets intensity is applied to separating sieve, makes magnetostriction materials It is flexible, and then change the size of sieve pore to obtain the sieve pore that matching is sized object grain size;Secondly, fluid to be sieved pressurization is made it By sieve pore, the grain size object more than slot size will not pass through sieve pore;It can be arranged as stated above by multiple sieve pore, finally Realize the screening to specified particle diameter range fluid;In addition, the height for being located at coil inside in electromagnet is arranged in the separating sieve of the present invention Magnetic conduction in-core, the magnetic field intensity inside electromagnet coil is larger, therefore, in the case where the electromagnet of equivalent specifications is driven, this hair The sieve pore adjustable range bigger of separating sieve in bright screening technique and screening plant, is conducive to improve the compact of this screening plant Property.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the schematic diagram of the compact aperture controlled fluid screening plant based on magnetostriction materials of the present invention.
Fig. 2 is the schematic diagram that the present invention carries out filtering flow flow;
Fig. 3 is the schematic diagram that the present invention carries out cleaning fluid back scrubbing flow.
Specific implementation mode
First embodiment:
The compact aperture controlled fluid screening technique based on magnetostriction materials of the present embodiment, includes the following steps: s1:Separating sieve is made using magnetostriction materials, the wherein sieve pore of separating sieve should be formed on magnetostriction materials, or by magnetic Telescopic material is caused to be arranged in sieve pore;In addition, the sieve pore in the present invention is not restricted to square hole, can be circular passage, Circular hole, profiled holes or can hinder particulate matter by gap;
s2:The separating sieve is embedded in electromagnet to be located in the magnetic core of coil inside, and using the electromagnet to institute The magnetic field that separating sieve applies direction initialization setting intensity is stated, so that magnetostriction materials is occurred flexible to adjust the sieve of the separating sieve The size in hole;Giant magnetostrictive material Tb-Dy-Fe systems alloy is such as selected, can realize the magneto-strain of 1500~2000ppm, it can It realizes 0.5nm to 100 μm of telescopic displacement range, telescopic displacement and is mapped one by one by having between the magnetic field intensity of current control Relationship, to by current control telescopic displacement, by control sieve pore size;Magnetic field intensity inside magnet spool compared with Greatly, therefore, when being driven using the electromagnet of equivalent specifications, the sieve pore adjustable range bigger of screening technique of the invention; In addition, since the usual circle along the shaft line of the magnetic line of force passes through the magnetic core of coil inside, the arranged direction of sieve pore should be perpendicular to line The axis direction of circle, it is ensured that the magnetic line of force passes perpendicularly through sieve pore.
s3:Fluid to be screened is set to flow through the sieve pore;Fluid to be screened is set to flow through sieve pore using existing pressurized equipment, greatly Sieve pore is will not pass through in the grain size object of slot size, the final screening for realizing fluid.It is more than 1 in certain industrial wastewater if you need to remove μm particulate matter, the industrial wastewater that pressurizes enters screening plant, and the size that sieve pore is arranged is 1 μm, then is more than 1 μm of particulate matter not It then can be screened out by sieve pore with water by sieve pore, particulate matter of the gained less than 1 μm.
s4:The sieve pore is flowed counterflow through using cleaning fluid, to remove or recycle the particle for being jammed in the sieve pore;Screening After a certain period of time, fail to be blocked in by the grain size object of sieve pore being greater than the set value on the outside of sieve pore, at this moment can utilize cleaning stream Body flows counterflow through sieve pore, and (forward direction herein refers to that fluid stream to be sieved crosses the direction of sieve pore, and direction in contrast is anti- To), wherein cleaning fluid passes through special selection, is easy to detach with the grain size object less than setting value filtered, will not be made to it At secondary pollution, as using cheap and chemically stable nitrogen to the particle for being more than 1 μm that is jammed in described in s3 on the outside of sieve pore Object is then more than 1 μm of particulate matter and is flowed out from cleaning fluid outlet 2 together with nitrogen and a small amount of industrial wastewater into horizontal high voltage back scrubbing, and Nitrogen will not pollute the screening object by sieve pore, will not pollute the regenerant of 2 outflow of cleaning fluid outlet.
S5. it repeats alternately to implement the step s3 and s4, until all fluids to be screened complete screening;Using screening process With the mode of back scrubbing flow periodic duty in turn, the screening of high-volume fluid can be realized, it is ensured that this screening plant can be grown Phase continuous work.
Heretofore described micro-nano fluid can be divided into two categories:It is made of different scale particle first, pure Mixed system (particulate matter here refers to the solid granulates with stable form, certain rigidity or elasticity);Second is that by different scale The mixed system of particulate matter and liquid (or gas) composition.Methods and apparatus of the present invention can reach in both classifications Extract the purpose of the particulate matter of specified particle diameter range.
In the present embodiment, fluid to be screened can be controlled and repeatedly flow through sieve pore, and gradually reduce the aperture of the sieve pore;Example Such as, when needing to filter out the particulate matter within the scope of 1~10um, the aperture that can first control sieve pore is 10um, is thus filtered out Then the mixture filtered out is carried out postsearch screening by 10um particulate matters below again, and it is 1um to control aperture.
In the present embodiment, the precompression perpendicular to magnetic direction is applied to the magnetostriction materials, to increase the magnetic Cause controllable magneto-strain of the telescopic material on magnetic direction;To increase the adjustable range of the sieve pore.Magnetostriction materials After being applied in precompression, it is possible to increase the strain of magnetic direction is applied at it, this is because, it is assumed that the totality of magnetostriction materials Product variation is certain, and the strain on another direction is by precompressed power limit, so increasing the strain on magnetic direction.
Second embodiment:
The compact aperture controlled fluid screening plant based on magnetostriction materials of the present embodiment, including separating sieve and magnetic Field generation device, wherein magnetic field generation device includes making magnetostriction materials send out for applying controllable magnetic field to the separating sieve It is raw flexible to adjust the electromagnet of the size of the sieve pore of the separating sieve;The separating sieve is embedded in electromagnet and is located in coil 3 In the magnetic core 2 in portion;At least side hole wall of the sieve pore 10 of the separating sieve makes for magnetostriction materials, under magnetic field environment, At least side hole wall of sieve pore 10 can stretch, and the size of object can be screened to change it;The magnetic field generation device Keep magnetostriction materials generation flexible to adjust the sieve pore 10 of the separating sieve for applying controllable magnetic field to the separating sieve Separating sieve is embedded in the magnetic core 2 inside magnet spool 3 by size, the present embodiment, and the position magnetic field intensity is larger, because This, when being driven using the electromagnet of equivalent specifications, the sieve pore of the separating sieve in the screening plant of the present embodiment adjusts model Bigger is enclosed, the compactedness for improving screening plant is conducive to;In addition, since usual 3 axis of coil of the magnetic line of force passes through coil inside High magnetic conduction core 2, therefore, the arranged direction of the sieve pore of the separating sieve in the present apparatus should be perpendicular to the axis direction of coil, it is ensured that magnetic The line of force 7 passes perpendicularly through sieve pore.
In the present embodiment, the separating sieve includes non-magnetic rigid mount 4;The non-magnetic rigid mount 4 is equipped with several Fluid channel;The fluid channel inner wall is equipped with the magnetostrictor 6 that magnetostriction materials make;Wherein, fluid channel is square Tee section, of course, it is possible to the fluid channel of other forms is selected as needed, such as round or annular.Magnetostrictor 6 is rectangular Body is blocky, and the bottom surface of fluid channel is equipped with the mounting groove of the embedded magnetostrictor 6, and magnetostrictor 6 is by the pre- of mounting groove Pressure acts on, to increase magneto-strain of the magnetostrictor 6 under magnetic field;When fluid flows through, need through magnetostrictor 6 With the gap between fluid channel inner wall, when magnetostrictor 6 expands, the width in the gap will reduce, should when extrusome is shunk The width in gap will increase.
In the present embodiment, the high magnetic conduction core 2 is " day " font longitudinal section, and longitudinal section is section by the central axes of coil Face, as shown in Figure 1, high magnetic conduction core central axes, integrally formed with column, the coil 3 is wound on the column at 2 middle part of magnetic core, such as It is equipped with and is open shown in Fig. 1, in the middle part of column, in the directly fixedly embedded opening of non-magnetic rigid mount 4, this arrangement formation can Greatly reduce leakage field.
In the present embodiment, the section of the non-magnetic rigid mount 4 is I-shaped, as shown in Figure 1, the section passes through coil Central axes, multiple fluid channels are arranged in parallel in the web of I-shaped structure, and the entrance and exit of fluid is set to I-shaped The top plate and bottom plate of type structure;In the groove of the I-shaped structure both sides of the side wall insertion of the opening at 2 middle part of the high magnetic conduction core To ensure that rigid mount 4 is fixed to each other with magnetic core 2;Certainly, the screening plant of the present embodiment further includes containing non-magnetic rigidity branch The shell 1 of seat 4, high magnetic conduction core 2 and electromagnetic coil 3, shell 1 can further decrease electromagnet leakage field.
In the present embodiment, the compact aperture controlled fluid screening plant of the invention based on magnetostriction materials also wraps Include the front end runner and rear end runner of the front-end and back-end connection for corresponding respectively to the fluid channel;The front end runner is equipped with The controllable fluid inlet to be screened 13 of opening and closing and cleaning fluid outlet 16;The rear end runner is equipped with the controllable stream to be screened of opening and closing Body outlet 15 and cleaning fluid entrance 14;Wherein, fluid inlet 13 to be screened and cleaning fluid outlet 16 are respectively arranged with fluid Inlet non-return valve 8 and cleaning fluid outlet solenoid valve 12, the fluid outlet 15 to be screened and cleaning fluid entrance 14 are right respectively Fluid outlet solenoid valve 11 and cleaning fluid inlet non-return valve 9 should be equipped with;The screening plant of the present embodiment is carrying out fluid screening When operation as unit of the work period, each period includes two flows, i.e. filtering flow flow and cleaning fluid back scrubbing flow. It is illustrated in figure 2 the operating diagram of filtering flow flow.According to required filtering particle size (allow by be less than set The grain size object of definite value) and the expansion and contraction of magnetostriction materials and the relationship of magnetic field intensity, determine that electromagnetic coil 3 applies accordingly Size of current, corresponding magnetostrictive displacement, cleaning fluid outlet solenoid valve 12 occur under magnetic fields for magnetostrictor 6 It closes, cleaning fluid inlet non-return valve 9 is closed, and mixture fluid enters under the pressure of pump from fluid inlet check-valves 8, is more than The grain size object of setting value fails, by the gap (i.e. sieve pore 10) between magnetostrictor 6 and fluid channel inner wall, to be less than setting After the grain size object of value is by the gap, flowed out from fluid outlet solenoid valve 11, and by container collection.After a certain period of time, fail to lead to The outside in magnetostriction gap may be blocked in by crossing the grain size object being greater than the set value in magnetostriction gap, and at this moment cleaning fluid is returned Wash journey is started to work, and sees Fig. 3.Cleaning fluid passes through special selection, that is, the grain size object less than setting value for being easy to and being filtered Separation, secondary pollution will not be caused to it, can quickly through the gap between magnetostrictor 6 and fluid channel inner wall, and It should be cheap and easy to get.When cleaning fluid back scrubbing flow works, fluid inlet check-valves 8 is closed, and fluid outlet solenoid valve 11 is closed, Cleaning fluid enters from cleaning fluid entrance 14, by magnetostriction gap, then from 16 outflow of cleaning fluid outlet, in this process In, cleaning fluid takes away the grain size object being greater than the set value in the outside for being blocked in gap together.After a certain period of time, cleaning fluid Back scrubbing flow terminates, and filtering flow flow starts again at, and a work period is constituted with this.
In the present embodiment, between the electromagnetic coil 3 and non-magnetic rigid mount 4 be equipped with non-magnetic partition board 5, it is non-magnetic every 5 one side of plate can reduce leakage field, on the other hand can ensure that the magnetic line of force 7 can pass perpendicularly through fluid channel, make magnetostriction Body 6 can be flexible along magnetic direction.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the right of invention.

Claims (10)

1. a kind of compact aperture controlled fluid based on magnetostriction materials screens the compact type hole based on magnetostriction materials Diameter controlled fluid screening technique, which is characterized in that include the following steps:
s1:Separating sieve is made using magnetostriction materials;
s2:The separating sieve is embedded in the high magnetic conduction in-core that electromagnet is located at coil inside, and using the electromagnet to institute The magnetic field that separating sieve applies direction initialization setting intensity is stated, so that magnetostriction materials is occurred flexible to adjust the sieve of the separating sieve The size in hole;
s3:Fluid to be screened is set to flow through the sieve pore.
2. the compact aperture controlled fluid screening technique according to claim 1 based on magnetostriction materials, feature It is:Further include step s4:The sieve pore is flowed counterflow through using cleaning fluid, the particulate matter of the sieve pore is jammed in removal; s5:It repeats alternately to implement the step s3 and s4, until all fluids to be screened complete screening.
3. the compact aperture controlled fluid screening technique according to claim 1 based on magnetostriction materials, feature It is:It controls fluid to be screened and repeatedly flows through the sieve pore, and gradually reduce the aperture of the sieve pore.
4. the compact aperture controlled fluid screening technique according to claim 1 based on magnetostriction materials, feature It is:Precompression is applied to the magnetostriction materials, to increase controllable magnetic of the magnetostriction materials on magnetic direction Cause strain.
5. a kind of compact aperture controlled fluid screening plant based on magnetostriction materials, which is characterized in that including separating sieve And magnetic field generation device;At least side hole wall of the sieve pore of the separating sieve makes for magnetostriction materials;The magnetic field generates Device includes making magnetostriction materials occur to stretch to adjust the separating sieve for applying controllable magnetic field to the separating sieve The electromagnet of the size of sieve pore;The separating sieve is embedded in electromagnet and is located in the magnetic core of coil inside.
6. the compact aperture controlled fluid screening plant according to claim 5 based on magnetostriction materials, feature It is:The separating sieve includes non-magnetic rigid mount;The non-magnetic rigid mount is equipped with several fluid channels;The fluid Vias inner walls are equipped with the magnetostrictor that magnetostriction materials make, to constitute controllable sieve pore;The non-magnetic rigid mount Precompression is applied to the magnetostrictor along the direction perpendicular to magnetic field.
7. the compact aperture controlled fluid screening plant according to claim 5 based on magnetostriction materials, feature It is:The high magnetic conduction core is " day " font section, and the coil is wound in the middle part of magnetic core.
8. the compact aperture controlled fluid screening plant according to claim 6 based on magnetostriction materials, feature It is:The non-magnetic rigid mount is " I " fonts section, and fluid channel is set in I-shaped web.
9. the compact aperture controlled fluid screening plant according to claim 5 based on magnetostriction materials, feature It is:Further include the front end runner and rear end runner of the front-end and back-end connection for corresponding respectively to the fluid channel;Before described Runner is held to be equipped with the controllable fluid inlet to be screened of opening and closing and cleaning fluid outlet;The rear end runner, which is equipped with, is opened and closed controllable wait for Screen fluid outlet and cleaning fluid entrance.
10. the compact aperture controlled fluid screening plant according to claim 6 based on magnetostriction materials, feature It is:Non-magnetic partition board is equipped between the electromagnetic coil and non-magnetic rigid mount.
CN201810243026.7A 2018-03-23 2018-03-23 Compact aperture-controllable fluid screening method and device based on magnetostrictive material Expired - Fee Related CN108704847B (en)

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