CN111644272B - Preparation method of graphene composite heat-dissipation coating and centrifugal machine thereof - Google Patents
Preparation method of graphene composite heat-dissipation coating and centrifugal machine thereof Download PDFInfo
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- CN111644272B CN111644272B CN202010543007.3A CN202010543007A CN111644272B CN 111644272 B CN111644272 B CN 111644272B CN 202010543007 A CN202010543007 A CN 202010543007A CN 111644272 B CN111644272 B CN 111644272B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/02—Continuous feeding or discharging; Control arrangements therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
Abstract
The embodiment of the invention discloses a preparation method of a graphene composite heat-dissipation coating and a centrifuge thereof, wherein a graphene injection pipe on a centrifuge main body is communicated to the inside of a rotary drum through a stock solution separation cylinder, and the stock solution separation cylinder is matched with the rotary drum to separate injected graphene stock solution and separated graphene supernatant; a plurality of centrifugal separation discs matched with the rotary drum to separate solid residues of graphene and supernatant of the graphene are arranged on the outer side of the stock solution separation barrel, and the centrifugal separation discs are matched with the quick equidistant installation to form a plurality of separation chambers for separating graphene stock solution; the centrifugal separation discs are sleeved in the height-limiting groove group arranged on the outer side of the stock solution separation barrel, and the sleeved centrifugal separation discs are quickly limited in height by the disc height-limiting grooves with the lengths increased in sequence, so that the adjacent distances of the centrifugal separation discs are the same after the centrifugal separation discs are sequentially installed, and manual extra debugging is not needed.
Description
Technical Field
The embodiment of the invention relates to the technical field of preparation of heat dissipation coatings, and particularly relates to a preparation method of a graphene composite heat dissipation coating and a centrifuge thereof.
Background
With the development of science and technology, people develop materials with high thermal conductivity and good heat dissipation effect as research key points, wherein the graphene composite heat dissipation coating is one of the high-performance materials which are currently researched and applied to the heat dissipation fins of the heat radiator, and has wide application prospects.
Conventionally, for example, CN210367596U is an apparatus for separating edible oil and fat, which is characterized in that it is used for low-speed centrifugation to efficiently extract edible oil and fat without using chemical agents such as demulsifiers and flocculants, and thus can be used as an apparatus for solid-liquid separation of graphene stock solution.
However, the prior art disc matched with the centrifugal disc still has the following defects in the using process:
(1) because the centrifuge mainly separates the graphene stock solution through the discs in the centrifuge, the spacing between the discs needs to be manually adjusted in the installation process of the discs, and the influence on the separation effect of the graphene stock solution due to the overlarge or undersize spacing between the discs is prevented;
(2) because the moving directions of the supernatant and the solid slag separated from the inside of the sub-runner are opposite, the separated solid slag moving towards the outside and the graphene stock solution continuously flowing into the sub-runner are flushed with each other, so that the separated solid slag is possibly carried to flow into the separation chamber again, and the separation efficiency of the solid slag on the graphene is reduced.
Disclosure of Invention
Therefore, the embodiment of the invention provides a preparation method of a graphene composite heat-dissipation coating and a centrifuge thereof, which are used for solving the problems that in the prior art, the distance needs to be manually adjusted after a disc is installed, and the separated solid slag generates hedging when moving outwards.
In order to achieve the above object, an embodiment of the present invention provides the following:
a preparation method of a graphene composite heat dissipation coating and a centrifuge thereof comprise a centrifuge main body for separating solid residues of a graphene stock solution and a graphene supernatant, wherein a rotary drum for bearing the graphene stock solution and driving the graphene stock solution to rotate and centrifuge is arranged in the centrifuge main body, a stock solution separation barrel extending to the inside of the rotary drum is arranged in the centrifuge main body, a graphene injection pipe on the centrifuge main body is communicated to the inside of the rotary drum through the stock solution separation barrel, and the stock solution separation barrel is matched with the rotary drum to separate the injected graphene stock solution and the separated graphene supernatant;
a plurality of centrifugal separation discs matched with the rotary drum to separate solid residues of graphene and supernatant of the graphene are arranged on the outer side of the stock solution separation barrel, and the centrifugal separation discs are matched with the stock solution separation barrel and are equidistantly arranged to form a plurality of separation chambers for separating the stock solution of the graphene;
the whole of the centrifugal separation disc is of a hollow round table-shaped structure, the inner side of the centrifugal separation disc is provided with a plurality of solid slag distribution chutes which are distributed at equal intervals, and the solid graphene slag separated in the separation chamber slides into the solid slag distribution chutes through centrifugal force and moves outwards.
As a preferable scheme of the present invention, a top circular table portion of the centrifugal separation disc is provided with a separation cylinder groove for being sleeved in the stock solution separation cylinder, and three groups of horizontal centering pieces attached to the outer side of the stock solution separation cylinder are arranged inside the separation cylinder groove, and the horizontal centering pieces are provided with outer angle bolts screwed into the stock solution separation cylinder for fixing the position of the centrifugal separation disc.
As a preferred scheme of the present invention, three limit protrusions are equidistantly disposed on the inner side of the separation barrel groove, three height limit groove sets are disposed on the outer side of the stock solution separation barrel and are matched with a plurality of centrifugal separation discs to be equidistantly sleeved, each height limit groove set is composed of a plurality of disc height limit grooves into which the limit protrusions are clamped, the lengths of the disc height limit grooves are sequentially increased from left to right, and the centrifugal separation discs are slidably sleeved on the outer side of the stock solution separation barrel through the three height limit groove sets to be in a vertically equidistant distribution state.
As a preferable scheme of the present invention, the top end of the stock solution separating cylinder is provided with inclined planes distributed around the outer edge, the top end openings of the three groups of height-limiting grooves are located on the inclined planes, and the inclined planes cooperate with the disc height-limiting grooves to form oblique cut openings for the limiting protrusions to be conveniently clamped.
As a preferable aspect of the present invention, a plurality of separation liquid holes penetrating through the centrifugal separation disc are formed in the top end of the centrifugal separation disc at the periphery of the separation cylinder groove, and the plurality of separation liquid holes are used for allowing separated graphene supernatant to flow into the separation chamber above.
As a preferable scheme of the present invention, the whole solid slag splitter box is an arc-shaped structure along the rotation direction of the rotary drum, and the plurality of solid slag splitter boxes are equidistantly distributed on the inner side of the centrifugal separation disc to form a spiral structure for allowing the separated graphene solid slag to enter from each direction.
As a preferred scheme of the present invention, the cross section of the solid slag diversion trench is in an inclined hole structure, and the opening of the whole solid slag diversion trench on the inner side surface of the centrifugal separation disc forms an inner arc edge which is convenient for sliding in the solid graphene slag and an outer arc edge which prevents the solid graphene slag from sliding out.
As a preferable scheme of the present invention, the top end of the inclined hole structure is in a semicircular structure, and a center of the semicircular structure at the top end of the inclined hole structure is located directly above the outer arc edge, and the inner arc edge is far away from the center of the semicircular structure at the top end of the inclined hole structure.
According to a preferable scheme of the invention, an acute angle structure for preventing solid graphene slag from sliding out is formed between the inner arc edge and the inclined hole structure through a chamfering process, and an obtuse angle structure for facilitating sliding of the solid graphene slag into is formed between the outer arc edge and the inclined hole structure through the chamfering process.
In addition, the invention also provides a preparation method of the graphene composite heat dissipation coating, which comprises the following steps:
s100, starting a centrifugal machine, wherein the centrifugal machine drives an inner rotary drum to start accelerated rotation through a motor until the rotating speed meets the use requirement;
s200, uniformly stirring the graphene stock solution in the stirring barrel at a constant speed, and conveying the graphene stock solution in the stirring barrel to a graphene injection pipe at a constant speed through the feed pump;
s300, injecting the graphene stock solution in the graphene injection pipe into a relatively static stock solution separation cylinder, and allowing the graphene stock solution to flow into the rotary drum from the bottom end of the stock solution separation cylinder;
s400, a centrifugal machine is matched with a plurality of centrifugal separation discs through high-speed rotation of an inner rotary drum to perform solid-liquid separation on graphene stock solution, solid residues of graphene are separated, and graphene supernatant is prepared;
s500, conveying the graphene supernatant to a dryer for drying to prepare a graphene treating agent;
s600, mixing the graphene treating agent, the surface treating agent and the solvent to prepare the composite heat dissipation coating.
The embodiment of the invention has the following advantages:
(1) according to the invention, the centrifugal separation discs are sleeved in the height-limiting groove group arranged on the outer side of the stock solution separation barrel, and the sleeved centrifugal separation discs are quickly limited in height by the disc height-limiting grooves with the lengths increased in sequence, so that the adjacent distances of the centrifugal separation discs are the same after the centrifugal separation discs are sequentially installed, and manual extra debugging is not needed;
(2) according to the invention, the inner wall of the centrifugal separation disc is provided with the solid residue splitter boxes for separating the graphene solid residues and the graphene supernatant, so that the graphene solid residues separated in the separation chamber can slide into the solid residue splitter boxes to move outwards, and the graphene solid residues cannot strongly collide with the graphene stock solution flowing into the separation chamber, thereby enhancing the efficiency of separating the graphene solid residues.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a cross-sectional view of a centrifuge bowl in an embodiment of the present invention;
FIG. 2 is a top view of a centrifugal separation disc according to an embodiment of the present invention;
FIG. 3 is a bottom view of a centrifugal separation disc according to an embodiment of the present invention;
FIG. 4 is a partial cross-sectional view of a solid slag runner in an embodiment of the invention;
FIG. 5 is a front view of a dope separation cartridge in an embodiment of the invention;
fig. 6 is a top view of a dope separating cartridge in an embodiment of the present invention.
In the figure: 1-a centrifuge body; 2-rotating the drum; 3-stock solution separating cylinder; 4-centrifugal separation disc; 5-a separation chamber; 6-solid slag shunt trough; 301-height limiting groove group; 3011-disc height-limiting groove; 3012-oblique cutting; 302-inclined plane;
401-separating cartridge slots; 402-horizontal centralizing piece; 403-limit protrusion; 404-separation liquid well;
601-inclined hole structure; 602-inner arc edge; 603-outer arc edge.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 6, the invention provides a preparation method of a graphene composite heat dissipation coating and a centrifuge thereof, and specifically includes a centrifuge main body 1 for separating solid residues of a graphene stock solution and a graphene supernatant, a rotary drum 2 for holding the graphene stock solution and driving the graphene stock solution to rotate and centrifuge is installed inside the centrifuge main body 1, a stock solution separation barrel 3 extending into the rotary drum 2 is installed inside the centrifuge main body 1, a graphene injection pipe on the centrifuge main body 1 is communicated to the inside of the rotary drum 2 through the stock solution separation barrel 3, and the stock solution separation barrel 3 cooperates with the rotary drum 2 to separate the injected graphene stock solution and the separated graphene supernatant;
a plurality of centrifugal separation discs 4 which are matched with the rotary drum 2 to separate solid residues of graphene and supernatant of the graphene are arranged on the outer side of the stock solution separation barrel 3, and the centrifugal separation discs 4 are quickly and equidistantly arranged in cooperation with the stock solution separation barrel 3 to form a plurality of separation chambers 5 for separating the stock solution of the graphene;
the centrifugal separation disc 4 is of a hollow circular truncated cone-shaped structure as a whole, the inner side of the centrifugal separation disc 4 is provided with a plurality of solid slag shunting grooves 6 which are distributed at equal intervals, and graphene solid slag separated from the separation chamber 5 slides into the solid slag shunting grooves 6 through centrifugal force and moves outwards.
As shown in fig. 2, the top circular table portion of the centrifugal separation disc 4 is provided with a separation cylinder slot 401 for being sleeved in the stock solution separation cylinder 3, and three groups of horizontal centralizing pieces 402 attached to the outer side of the stock solution separation cylinder 3 are arranged inside the separation cylinder slot 401, and the horizontal centralizing pieces 402 are provided with outer angle bolts screwed into the stock solution separation cylinder 3 for fixing the position of the centrifugal separation disc 4.
As shown in fig. 2, 5 and 6, the inner side of the separation barrel slot 401 is provided with three equally-spaced limiting protrusions 403, the outer side of the stock solution separation barrel 3 is provided with three sets of height-limiting slot sets 301 which are matched with a plurality of centrifugal separation discs 4 and are equidistantly sleeved, the height-limiting slot set 301 is composed of a plurality of disc height-limiting slots 3011 for the limiting protrusions 403 to be clamped in, the lengths of the disc height-limiting slots 3011 are sequentially increased from left to right, and the centrifugal separation discs 4 are slid on the outer side of the stock solution separation barrel 3 through the three sets of height-limiting slot sets 301 in a vertically-equally-spaced state.
The top end of the stock solution separating cylinder 3 is provided with inclined planes 302 distributed around the outer edge, the top end openings of the three groups of height-limiting groove groups 301 are positioned on the inclined planes 302, and inclined cut openings 3012 for the limiting bulges 403 to be clamped are formed by matching the inclined planes 302 with the disc height-limiting grooves 3011.
A plurality of separation liquid holes 404 penetrating the centrifugal separation disc 4 are formed at the top end of the centrifugal separation disc 4 on the periphery of the separation cylinder groove 401, and the separation liquid holes 404 are used for allowing separated graphene supernatant to flow into the upper separation chamber 5.
The whole solid slag shunting grooves 6 are of arc structures along the rotating direction of the rotary drum 2, and the plurality of solid slag shunting grooves 6 are distributed on the inner side of the centrifugal separation disc 4 at equal intervals to form a spiral structure which is convenient for separated graphene solid slag to enter from all directions.
As shown in fig. 4, the cross section of the solid slag shunting groove 6 is an inclined hole structure 601, and the opening of the whole solid slag shunting groove 6 on the inner side surface of the centrifugal separation disc 4 forms an inner arc edge 602 convenient for sliding in the solid graphene slag and an outer arc edge 603 preventing the solid graphene slag from sliding out.
The top end of the inclined hole structure 601 is in a semicircular structure, the circle center of the semicircular structure at the top end of the inclined hole structure 601 is positioned right above the outer arc edge 603, and the inner arc edge 602 is far away from the circle center of the semicircular structure at the top end of the inclined hole structure 601.
An acute angle structure for preventing solid graphene slag from sliding out is formed between the inner arc edge 602 and the inclined hole structure 601 through a chamfering process, and an obtuse angle structure for facilitating solid graphene slag to slide in is formed between the outer arc edge 603 and the inclined hole structure 601 through a chamfering process.
The embodiment has the following beneficial effects:
(1) the centrifugal separation discs 4 are sleeved in the height-limiting groove group 301 arranged on the outer side of the stock solution separation barrel 3, and the sleeved centrifugal separation discs 4 are quickly limited in height by the disc height-limiting grooves 3011 with sequentially increased lengths, so that the adjacent distances of the centrifugal separation discs 4 are the same after being sequentially installed, and manual extra debugging is not needed;
(2) through set up a plurality of solid sediment splitter boxes 6 that are used for separating solid sediment of graphite alkene and graphite alkene supernatant on the inner wall of centrifugal separation dish 4 for solid sediment of graphite alkene of separating in the separator can slide into solid sediment splitter box 6 and move to the outside, consequently the solid sediment of graphite alkene can not produce strong clashing with the graphite alkene stoste that flows into in the separator 5, has strengthened the efficiency of the solid sediment of separation graphite alkene from this.
The invention also provides a preparation method of the graphene composite heat dissipation coating, which comprises the following steps:
s100, starting a centrifugal machine, wherein the centrifugal machine drives an inner rotary drum 2 to start accelerated rotation through a motor until the rotating speed meets the use requirement;
s200, uniformly stirring the graphene stock solution in the stirring barrel at a constant speed, and conveying the graphene stock solution in the stirring barrel to a graphene injection pipe at a constant speed through a feed pump;
s300, injecting the graphene stock solution in the graphene injection pipe into a relatively static stock solution separation cylinder 3, and flowing into the rotary drum 2 from the bottom end of the stock solution separation cylinder 3;
s400, a centrifugal machine is matched with a plurality of centrifugal separation discs 4 to carry out solid-liquid separation on the graphene stock solution through high-speed rotation of an inner rotary drum 2, solid residues of graphene are separated, and graphene supernatant is prepared;
s500, conveying the graphene supernatant to a dryer for drying to prepare a graphene treating agent;
s600, mixing the graphene treating agent, the surface treating agent and the solvent to prepare the composite heat dissipation coating.
Before use, a plurality of centrifugal separation discs 4 are sleeved outside a stock solution separating cylinder 3 in sequence, a plurality of separating chambers 5 for separating graphene supernatant are formed in a rotating drum 2, when a first centrifugal separation disc 4 is installed, a separating cylinder groove 401 on the centrifugal separation disc 4 is sleeved on the top end of the stock solution separating cylinder 3, three limit protrusions 403 on the centrifugal separation disc 4 are clamped into disc height limit grooves 3011 on the rightmost sides of three height limit groove groups 301 along inclined cut openings 3012, so that the centrifugal separation disc 4 slides into the bottommost part of the stock solution separating cylinder 3 along three longest disc height limit grooves 3011, finally, outer corner bolts on three horizontal centering sheets 402 on the centrifugal separation disc 4 are screwed into the stock solution separating cylinder 3 to complete installation, and the centrifugal separation disc 4 is kept in a horizontal state under the stress action exerted on the stock solution separating cylinder 3 by the three horizontal centering sheets 402, then, the remaining centrifugal separation discs 4 are sequentially installed from right to left according to the above method, and a plurality of centrifugal separation discs 4 can be quickly installed at equal intervals. When the centrifugal machine is used, the centrifugal machine is started, the rotary drum 2 in the centrifugal machine main body 1 starts to rotate at a high speed, sealing water is injected into the centrifugal machine main body 1 at the moment, the piston structure of the rotary drum 2 is driven to ascend to block a solid residue outlet, graphene raw materials are continuously conveyed into the stock solution separation barrel 3 through the feeding pump and flow into the rotary drum 2 through the bottom end of the stock solution separation barrel 3, centripetal force is provided for graphene stock solution along with the high-speed rotation of the rotary drum 2, solid residues with high specific gravity in the graphene stock solution move towards the inner wall of the rotary drum 2 and are accumulated on the inner wall of the rotary drum 2 under the action of centrifugal force, sealing water in the centrifugal machine main body 1 is discharged in the separation process, the rotary drum 2 is opened to discharge accumulated graphene solid residues, the blockage in the rotary drum 2 is prevented, graphene supernatant with light specific gravity can move towards the nearby separation chamber 5 under the action of pressure, and the graphene supernatant in the separation chamber 5 flows into the separation chamber 5 of the previous stage through the separation liquid hole 404 of And finally, the graphene supernatant prepared by the centrifuge is obtained by flowing through the uppermost centrifugal separation disc 4 and then discharging the graphene supernatant.
The primarily separated graphene supernatant can move inwards along the separation chamber 5, solid residues of graphene can be continuously separated in the process, the solid residues of graphene separated from the separation chamber 5 can move outwards under the action of centrifugal force and contact with the inner side of the centrifugal separation disc 4 above in the process of moving outwards, and the solid residues of graphene are influenced by the rotation of the rotary drum 2 in the process of moving outwards, so that the solid residues of graphene can move spirally outwards along the rotation direction of the rotary drum 2.
The solid graphene slag in the separation chamber 5 can cling to the inner side of the centrifugal separation disc 4 above when spirally moving outwards, and because the whole arc direction of the solid slag shunting groove 6 is also the rotating direction along the rotary drum 2, the solid graphene slag can firstly slide into the solid slag shunting groove 6 through the obtuse-angle outer arc edge 603 when sliding along the inner side of the centrifugal separation disc 4, and the solid graphene slag in the solid slag shunting groove 6 cannot easily slide out through the acute-angle inner arc edge 602, so that the solid graphene slag separated from the separation chamber 5 cannot strongly collide with the graphene supernatant flowing into the separation chamber 5 when moving outwards, and the efficiency of separating the solid graphene slag is enhanced.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. A graphene preparation centrifugal machine comprises a centrifugal machine main body (1) for separating solid residues of graphene stock solution and graphene supernatant, wherein a rotary drum (2) for bearing the graphene stock solution and driving the graphene stock solution to rotate and centrifuge is arranged inside the centrifugal machine main body (1), and a stock solution separation barrel (3) extending into the rotary drum (2) is arranged inside the centrifugal machine main body (1), and is characterized in that a graphene injection pipe on the centrifugal machine main body (1) is communicated to the inside of the rotary drum (2) through the stock solution separation barrel (3), and the stock solution separation barrel (3) is matched with the rotary drum (2) to separate the injected graphene stock solution and the separated graphene supernatant;
a plurality of centrifugal separation discs (4) which are matched with the rotary drum (2) to separate solid residues of graphene and supernatant of the graphene are arranged on the outer side of the stock solution separation barrel (3), and the centrifugal separation discs (4) are matched with the stock solution separation barrel (3) and are arranged at equal intervals to form a plurality of separation chambers (5) for separating out stock solution of the graphene;
the whole centrifugal separation disc (4) is of a hollow truncated cone-shaped structure, a plurality of solid slag shunting grooves (6) which are distributed at equal intervals are formed in the inner side of the centrifugal separation disc (4), and graphene solid slag separated from the separation chamber (5) slides into the solid slag shunting grooves (6) through centrifugal force and moves outwards;
a separating cylinder groove (401) for sleeving the stock solution separating cylinder (3) is arranged on the circular table part at the top end of the centrifugal separating disc (4), three groups of horizontal centering sheets (402) attached to the outer side of the stock solution separating cylinder (3) are arranged inside the separating cylinder groove (401), and outer angle bolts screwed into the stock solution separating cylinder (3) and used for fixing the centrifugal separating disc (4) are arranged on the horizontal centering sheets (402);
the inner side of the separation barrel groove (401) is provided with three limit bulges (403) which are distributed equidistantly, the outer side of the stock solution separation barrel (3) is provided with three sets of height limit groove groups (301) which are matched with a plurality of centrifugal separation discs (4) to be sleeved equidistantly, each height limit groove group (301) consists of a plurality of disc height limit grooves (3011) for the limit bulges (403) to be clamped in, the lengths of the disc height limit grooves (3011) are sequentially increased from left to right, and the centrifugal separation discs (4) are in a state of being distributed equidistantly from top to bottom on the outer side of the stock solution separation barrel (3) through the three sets of height limit groove groups (301) in a sliding manner.
2. The graphene preparative centrifuge according to claim 1, wherein the top end of the stock solution separating cylinder (3) is provided with inclined surfaces (302) distributed around the outer edge, the top end openings of the three sets of height-limiting grooves (301) are located on the inclined surfaces (302), and the inclined surfaces (302) cooperate with the disc height-limiting grooves (3011) to form chamfered openings (3012) for the limiting protrusions (403) to be clamped into.
3. The graphene preparative centrifuge according to claim 1, wherein the top end of the centrifugal separation disc (4) is provided with a plurality of separation liquid holes (404) penetrating through the centrifugal separation disc (4) at the periphery of the separation cylinder groove (401), and the plurality of separation liquid holes (404) are used for allowing separated graphene supernatant to flow into the upper separation chamber (5).
4. The graphene preparation centrifuge as claimed in claim 1, wherein the solid slag shunting grooves (6) are integrally of an arc-shaped structure along the rotation direction of the rotating drum (2), and a plurality of solid slag shunting grooves (6) are equidistantly distributed on the inner side of the centrifugal separation disc (4) to form a spiral structure for facilitating the separated graphene solid slag to enter from all directions.
5. The graphene preparation centrifuge as claimed in claim 4, wherein the cross section of the solid slag shunt groove (6) is an inclined hole structure (601), and the opening of the whole solid slag shunt groove (6) on the inner side surface of the centrifugal separation disc (4) forms an inner arc edge (602) for facilitating sliding of solid graphene slag and an outer arc edge (603) for preventing solid graphene slag from sliding out.
6. The graphene preparation centrifuge as claimed in claim 5, wherein the top end of the inclined hole structure (601) is in a semicircular structure, and the center of the semicircular structure at the top end of the inclined hole structure (601) is located directly above the outer arc edge (603), and the inner arc edge (602) is far away from the center of the semicircular structure at the top end of the inclined hole structure (601).
7. The graphene preparation centrifuge as claimed in claim 6, wherein an acute angle structure for preventing solid graphene slag from sliding out is formed between the inner arc edge (602) and the inclined hole structure (601) through a chamfering process, and an obtuse angle structure for facilitating solid graphene slag to slide in is formed between the outer arc edge (603) and the inclined hole structure (601) through a chamfering process.
8. The preparation method of the graphene composite heat dissipation coating based on the centrifuge of any one of claims 1 to 7 is characterized by comprising the following steps:
s100, starting a centrifugal machine, wherein the centrifugal machine drives an inner rotary drum (2) to start accelerated rotation through a motor until the rotating speed meets the use requirement;
s200, uniformly stirring the graphene stock solution in the stirring barrel at a constant speed, and conveying the graphene stock solution in the stirring barrel to a graphene injection pipe at a constant speed through a feed pump;
s300, injecting the graphene stock solution in the graphene injection pipe into a relatively static stock solution separation cylinder (3), and flowing into the rotary drum (2) from the bottom end of the stock solution separation cylinder (3);
s400, a centrifugal machine is matched with a plurality of centrifugal separation discs (4) to carry out solid-liquid separation on the graphene stock solution through high-speed rotation of an inner rotary drum (2), solid residues of graphene are separated, and graphene supernatant is prepared;
s500, conveying the graphene supernatant to a dryer for drying to prepare a graphene treating agent;
s600, mixing the graphene treating agent, the surface treating agent and the solvent to prepare the composite heat dissipation coating.
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