CN107350009B - Can apply roll squeezer of electric field - Google Patents
Can apply roll squeezer of electric field Download PDFInfo
- Publication number
- CN107350009B CN107350009B CN201710704861.1A CN201710704861A CN107350009B CN 107350009 B CN107350009 B CN 107350009B CN 201710704861 A CN201710704861 A CN 201710704861A CN 107350009 B CN107350009 B CN 107350009B
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- roller
- press
- electric field
- alloy
- roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The invention relates to a roller press capable of applying an electric field, which is characterized in that the roller surface of the roller press is made of conductive materials, the rollers are electrically insulated, and a direct current electric field or an alternating current electric field can be applied between the rollers by means of friction of an electric brush on the roller surface during operation. The conventional roller press mainly utilizes shearing force and rolling force among rollers to realize crushing and dispersing of particles; besides the function of the conventional roller press, the roller press provided by the invention can apply alternating current and direct current electric fields between rollers, and through introducing electrochemical action, particles or solution in a system are induced to generate physical and chemical changes, so that interaction force between the particles or the solution is increased, and grinding and dispersing efficiency is improved. The invention can realize high-efficiency grinding and rapid mixing of solid-liquid dispersion systems, such as crushing and homogenizing of solid particles in solid-liquid systems of printing ink, coating, cosmetics and the like, and mixing and dispersing of liquid-liquid two phases.
Description
Technical Field
The invention relates to the field of dispersion and grinding of liquid-liquid or solid-liquid two-phase dispersion systems, in particular to a roller press capable of applying an electric field.
Background
The nano technology can radically change many traditional products, and the nano particles or nano materials are added into the traditional materials, so that a series of functions can be improved or obtained, such as the application of the nano technology in paint, ink or coating, not only can the coverage rate be greatly improved, but also the ageing time of the materials can be prolonged, and the raw materials can be saved. The static phenomenon generated by friction can be eliminated by adding a small amount of metal nano particles into the chemical fiber cloth. The addition of nano material into food, medicine and cosmetics can raise the absorption rate of effective matter greatly. Nanoceramics have been widely used in the computer, aerospace, and military fields. Nanotechnology has thus silently led to a variety of changes in human life and will be a revolutionary technology.
The nano technology firstly prepares the powder material with nano scale by a certain method, when the particle size of the powder is reduced from 10um to 10nm, the particle size is changed to 1000 times, and the powder material is converted into volume change to have 10 9 The physical and chemical properties of the two are greatly different, and the peculiar surface effect, quantum size effect and high chemical reactivity of the nano particles are reflected. And the fields thereof relate to the fields of chemistry, physics, material science, molecular biology and the like. The nano powder has huge surface area and surface energy, so that the nano powder is easy to agglomerate, has the difficulties of poor fluidity, difficult dispersion and the like in specific application, and only carries out corresponding treatment on the surface of the nano powder according to the properties of the applied mediumThe modification can lead the nano powder to be evenly dispersed in the medium, thereby playing the role of the nano material.
The method for producing the micro-nano particle material includes a chemical method, a mechanical method, and the like. Grinding enables the material to be broken down mechanically to the nanoscale.
The roller press is a material mixing and grinding device commonly used in industry, and is mainly applied to mixing, grinding and dispersing liquid slurry and pasty materials such as paint and ink, pigment coating, cosmetics, rubber and the like. For a two-phase dispersion system (such as a solid-liquid two-phase system formed by solid particles and a solvent, or an oil-water two-phase dispersion system), the conveying process of materials on the roll surface of a roll squeezer can be regarded as the flow of fluid between rolls and on the roll surface, the extrusion and friction of a compression roll to a dispersion phase are mainly concentrated at gaps between rolls, at the moment, the rotation of the compression roll causes the mutual extrusion and friction of particles in the dispersion system between the rolls, and meanwhile, the speed difference between the rolls can apply friction shearing force to the materials, so that the purposes of mixing, grinding and dispersing are achieved.
However, in the actual use process, in some cases, due to the mismatch of surface energy, polarity or affinity and the like between two-phase systems, the interaction between particles and a solvent is weak, and the friction shearing force generated in the rotation process of a press roller is difficult to be conducted to solid particles, so that the crushing or dispersing effect is poor. If an alternating current electric field and a direct current electric field can be applied between the rollers, the electrochemical regulation and control function is introduced to induce particles or solution in the system to generate physical changes such as interface polarization, viscosity change and the like, even generate chemical intercalation or chemical reaction, so that the interaction force between the particles or the solution is increased, and the grinding and dispersing efficiency can be improved. Meanwhile, for oriented particles, such as one-dimensional fibers and two-dimensional lamellar materials, orientation arrangement can be generated under the action of an electric field, so that shearing force can be applied to a certain direction in a targeted manner, and a unique grinding effect is generated.
Disclosure of Invention
The invention provides a roller press capable of applying an electric field, wherein the roller surface of the roller press is made of conductive materials, and a direct current electric field or an alternating current electric field can be applied between rollers by rubbing the roller surface through an electric brush during operation. The conventional roller press mainly utilizes shearing force and rolling force among rollers to realize crushing of solid particles and solid-liquid dispersion; besides the function of the conventional roller press, the roller press provided by the invention can apply alternating current and direct current electric fields between rollers, and through introducing electrochemical action, particles or solution in a system are induced to generate physical and chemical changes, so that interaction force between the particles or the solution is increased, and grinding and dispersing efficiency is improved.
The technical scheme for realizing the invention is as follows: a roller press capable of applying an electric field comprises a base, a frame, a press roller interval adjusting device, a speed adjusting device, a voltage applying device, a feeding baffle and a discharging device, wherein the roller surface of the press roller is made of conductive materials.
To achieve the electric field between the rolls, the following means can be used: 1) The compression roller is fixed on the frame through a bearing, and the bearing is made of insulating materials; 2) The surface layer of the compression roller is made of conductive materials, and the central shaft of the inner layer is made of insulating materials; the compression roller is of a three-layer composite structure and comprises a roller surface of an outer layer made of conductive materials, an insulating interlayer in the middle and a central shaft of an inner layer, wherein the insulating interlayer is made of insulating materials.
The roller press generally comprises at least two pressing rollers, and the bearing, the central shaft or the insulating interlayer is designed to be made of insulating materials so as to prevent charges on the surfaces of the pressing rollers from being transferred to other parts of the roller press and ensure that the charges are only distributed on the surfaces of the pressing rollers.
And the frame is also provided with an electric brush fixing device, the electric brush fixing device is provided with a Y-shaped electric brush bracket, the lower end of the Y-shaped electric brush bracket is provided with a graphite electric brush, and the graphite electric brush is contacted with the roller surface of the compression roller.
The conductive material is iron-based alloy, nickel-chromium alloy, chromium carbide alloy, high manganese alloy, tungsten carbide alloy, nickel-tungsten alloy, titanium alloy, aluminum alloy, magnesium alloy, copper alloy and nickel alloy.
The insulating material is polyamide, polytetrafluoroethylene, polyethylene, heat-resistant epoxy resin, phenolic resin, polyoxymethylene, fluoroplastic, polyimide, organosilicon/polyphenylene sulfide, chlorinated polyether, zirconia or alumina.
The number of the press rolls is at least 2, and voltage is applied between the adjacent press rolls to form an alternating current or direct current electric field. The voltage application modes can be as follows: if the number of rollers is even, such as a 2-roller machine, the voltage application mode is positive and negative. The voltage application mode of the 4-roller machine is positive, negative, positive and negative; if the number of the rollers is odd, such as a 3-roller machine, the voltage application mode is positive, negative, positive, or negative, positive and negative; or positive, zero, negative.
The compression roller is installed in the frame through the bearing, is equipped with feed arrangement and discharging device in the frame, is equipped with feeding baffle on the feed arrangement, and feeding baffle is located the both sides of compression roller, discharging device includes discharge plate and scraper group, and the scraper is fixed in the upper end of discharge plate, and the material is taken out through the compression roller of discharge end after the mutual extrusion of compression roller, is scraped through the scraper and gets the back and flow out through the discharge plate.
The feeding baffle is perpendicular to the roller surface of the compression roller, and the lower end of the feeding baffle is attached to the roller surface.
The scraper forms a certain included angle with the compression roller at the discharge end, and the included angle is 10 o ~45 o 。
The invention relates to an electric field applied between rollers, in particular to an insulated electric brush fixing device, which is characterized in that a Y-shaped electric brush bracket is tightly pressed and attached to one end surface of a press roller, so that an electric brush is attached to the roller surface, the electric brush is a conventional graphite electric brush, and a carbon brush binding post is connected with the output end of a direct current power supply or an alternating current power supply through a wire.
The beneficial effects of the invention are as follows: 1. through the compression roller of design three-layer composite construction, can realize exerting direct current electric field or alternating current electric field between the roller of roll squeezer, guaranteed the insulation of roll surface and compression roller machine main body structure simultaneously, make the electric charge on the compression roller distribute only on the surface of roller and do not take place to shift.
2. The electric field can be applied to the press roller, and the particles in the solid-liquid dispersion system generate polarization under the action of the electric field, so that the interaction between the dispersion phase and the solvent phase is enhanced, and the grinding efficiency is improved.
3. Under the action of an electric field, particles in the solid-liquid dispersion system are polarized to generate orientation, so that the orientation of the particles can be matched with the movement direction of the particles on the roller surface of the press roller, and the shearing effect is enhanced.
4. Through the optimized reaction system, electrochemical reaction can be carried out simultaneously in the rolling process, and mechanical force and electrochemical acting force are superposed together to generate unique grinding effect.
Drawings
Fig. 1 is a schematic view of a three-layer composite structure of a roll press.
Fig. 2 is a schematic structural view of a roll squeezer.
Fig. 3 is a schematic view of a feed baffle of a roll squeezer.
Fig. 4 is a schematic view of the discharge plate structure of the roll squeezer.
Detailed Description
As shown in fig. 2, 3 and 4, the invention provides a roller press capable of applying an electric field, which comprises a base, a frame 12, press rollers, a press roller distance adjusting device 11, a speed adjusting device 122, a voltage applying device, a feeding baffle 19 and a discharging device, wherein adjacent press rollers are electrically insulated, and the roller surfaces of the press rollers are made of conductive materials.
The compression roller is installed on the frame 12 through the bearing, is equipped with feed arrangement and discharging device in the frame, is equipped with feeding baffle 19 on the feed arrangement, and feeding baffle 19 is located the both sides of compression roller, discharging device includes discharge plate 53 and scraper 51 and constitutes, and scraper 51 is fixed in the upper end of discharge plate 53, and the material is taken out through the compression roller of discharge end after the mutual extrusion of compression roller, is scraped through scraper 51 and is got the outflow through discharge plate 53.
The press rollers are mounted on the frame 12 through mechanical bearings, the rotational speed of the press rollers is adjusted through a vector type frequency converter 121, and the interval between the press rollers is adjusted through a rotating handle closely contacted with the frame 12. The two feeding baffles 19 are respectively arranged at two sides of the compression roller at the feeding position, are perpendicular to the roller surface and are attached to the roller surface at the lower end. The feeding baffle 19 is made of polytetrafluoroethylene, and is fixed on the steel frame through a fixing screw, and the lower end of the feeding baffle is processed into an inward concave arc edge at two sides, so that the feeding baffle is just tightly attached to the roller surface.
The scraper 51 forms a certain included angle with the compression roller at the discharge end, and the included angle is 10 o ~45 o 。
The machine frame is also provided with an electric brush fixing device 32, the electric brush fixing device 32 is provided with a Y-shaped electric brush bracket 33, the lower end of the Y-shaped electric brush bracket 33 is provided with a graphite electric brush 34, and the graphite electric brush 34 is contacted with a roller surface 35 of the compression roller.
The graphite brushes 34 can be pressed onto the roll surface, but of course also onto the roll sides and even onto the support shaft if of the single-layer design described above.
When the electric field generator is used, the graphite electric brush 34 is electrified, the electric brush is in contact with the press roller, a direct current electric field can be applied to the press roller, and meanwhile, the electric charge on the press roller can be only distributed on the surface of the press roller without transfer due to the insulation design of the press roller.
Example 1
The number of the press rolls is at least 2, and charges with different polarities are applied between the adjacent press rolls.
Depending on the number of rolls, there may be various ways of applying the electric field, for example, when there are more than 2 rolls, charges of opposite polarity may be applied to adjacent rolls, for example, when there are 4 rolls, the 1 st and 3 rd rolls apply positive charges, and the 2 nd and 4 th rolls apply negative charges.
Example 2
The number of the press rolls is at least n+1, wherein n is an even number except 0, no electric charge is applied to the nth press roll, and electric charges with different polarities are respectively applied to two press rolls adjacent to the nth press roll.
When the number of the press rolls is 3, 5, 7, 9 and … …, the electric field may be applied in the form of +, 0, -,0, +, 0, -,0 means that no electric field is applied, that is, positive charges are applied to odd rolls such as 1 st, 3 th, 5 th and the like, and negative charges are applied to even rolls such as 2 nd, 4 th and the like.
Of course, the electric field may be applied by providing electric fields of different polarities between two adjacent press rolls in the same manner as in embodiment 1.
Example 3
Taking a three-roller machine as an example, adjacent compression rollers are electrically insulated, and the roller surfaces of the compression rollers are made of conductive materials. In order to realize electrical insulation between adjacent press rolls, the press rolls are fixed on the frame through bearings, and the bearings are made of insulating materials.
The electric field may be applied in the form of +, -, +, i.e., positive charge is applied to the 1 st and 3 rd press rolls and negative charge is applied to the second press roll.
The electric field application mode of the three-roller machine can be as follows: and + 0, -i.e. no electric field is applied to the second press roll, and only electric fields of opposite polarity are applied to the 1 st and 3 rd press rolls, so that the press rolls have different charges.
Example 4
As shown in fig. 1, the press roll has a three-layer composite structure, which includes an outer roll surface 35 made of a conductive material, an intermediate insulating interlayer 37, and a central axis 36 of the inner layer, wherein the insulating interlayer 37 is made of an insulating material.
Example 5
The press roller includes a roller surface 35 of an outer layer made of a conductive material and a center shaft 36 of an inner layer, the center shaft 36 being made of an insulating material.
Preferably, the conductive material is iron-based alloy, nichrome, chromium carbide alloy, high manganese alloy, tungsten carbide alloy, nickel tungsten alloy, titanium alloy, aluminum alloy, magnesium alloy, copper alloy, or nickel alloy.
Preferably, the insulating material is polyamide, polytetrafluoroethylene, polyethylene, heat-resistant epoxy resin, phenolic resin, polyoxymethylene, fluoroplastic, polyimide, organosilicon/polyphenylene sulfide, chlorinated polyether, zirconia or alumina.
Claims (6)
1. The utility model provides a can apply roll squeezer of electric field, includes base, frame (12), compression roller interval adjusting device (11), speed adjusting device (122), voltage application device, feeding baffle (19) and discharging device, its characterized in that: the roll surface of the press roll is made of conductive materials, and voltage is applied to the press roll to form an electric field;
the press roller comprises a roller surface (35) made of conductive materials and a central shaft (36) of an inner layer, wherein the central shaft (36) is made of insulating materials; or the press roller is of a three-layer composite structure and comprises an outer roller surface (35) made of conductive materials, an intermediate insulating interlayer (37) and a central shaft (36) of an inner layer, wherein the insulating interlayer (37) is made of insulating materials;
the number of the press rolls is at least 2, and voltage is applied between the adjacent press rolls to form an alternating current or direct current electric field; or the number of the press rolls is at least n+1, wherein n is an even number except 0, no voltage is applied to the nth press roll, and voltages are applied to two press rolls adjacent to the nth press roll to form an alternating current or direct current electric field.
2. The electric field applicable roller press of claim 1, wherein: the compression roller is fixed on the frame through a bearing, and the bearing is made of insulating materials.
3. The electric field applicable roller press of claim 1, wherein: the machine frame is also provided with an electric brush fixing device (32), the electric brush fixing device (32) is provided with a Y-shaped electric brush bracket (33), the lower end of the Y-shaped electric brush bracket (33) is provided with a graphite electric brush (34), and the graphite electric brush (34) is contacted with a roller surface (35) of the compression roller.
4. A roll squeezer capable of applying an electric field according to claim 1 or 3, wherein: the conductive material is iron-based alloy, nichrome, chromium carbide alloy, high manganese alloy, tungsten carbide alloy, nickel tungsten alloy, titanium alloy, aluminum alloy, magnesium alloy, copper alloy or nickel alloy.
5. A roll squeezer capable of applying an electric field according to claim 2 or 3, wherein: the insulating material is polyamide, polyethylene, heat-resistant epoxy resin, phenolic resin, polyformaldehyde, fluoroplastic, polyimide, organosilicon/polyphenylene sulfide, chlorinated polyether, zirconia or alumina.
6. The electric field applicable roller press of claim 1, wherein: the compression roller is installed on a frame (12) through a bearing, a feeding device and a discharging device are arranged on the frame, a feeding baffle plate (19) is arranged on the feeding device, the feeding baffle plate (19) is located on two sides of the compression roller, the discharging device comprises a discharging plate (53) and a scraper (51), the scraper (51) is fixed at the upper end of the discharging plate (53), and materials are taken out through the compression roller at the discharging end after being mutually extruded by the compression roller and flow out through the discharging plate (53) after being scraped by the scraper (51).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710704861.1A CN107350009B (en) | 2017-08-17 | 2017-08-17 | Can apply roll squeezer of electric field |
| US16/623,322 US11358150B2 (en) | 2017-08-17 | 2018-08-16 | Roller press capable of applying electric field |
| PCT/CN2018/100724 WO2019034092A1 (en) | 2017-08-17 | 2018-08-16 | Roller press capable of applying electric field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710704861.1A CN107350009B (en) | 2017-08-17 | 2017-08-17 | Can apply roll squeezer of electric field |
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| Publication Number | Publication Date |
|---|---|
| CN107350009A CN107350009A (en) | 2017-11-17 |
| CN107350009B true CN107350009B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710704861.1A Active CN107350009B (en) | 2017-08-17 | 2017-08-17 | Can apply roll squeezer of electric field |
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| CN (1) | CN107350009B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11358150B2 (en) * | 2017-08-17 | 2022-06-14 | Henan University | Roller press capable of applying electric field |
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| JP2004141854A (en) * | 2002-08-28 | 2004-05-20 | Fuji Xerox Co Ltd | Shredder apparatus and shredding method |
| JP6275586B2 (en) * | 2014-08-08 | 2018-02-07 | 住友ゴム工業株式会社 | Conductive roller, manufacturing method thereof, and image forming apparatus |
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| US3833493A (en) * | 1968-10-03 | 1974-09-03 | Xerox Corp | Imaging process |
| US4084496A (en) * | 1976-04-30 | 1978-04-18 | G.B.C., Inc. | Method and apparatus for crushing and separating metallic containers |
| US5782177A (en) * | 1995-02-22 | 1998-07-21 | Ems Elektromagnetische Systeme Gmbh | Electromagnetic roller arrangement |
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