Mixing device for proportioning carbon nanotubes

Abstract

The utility model discloses a material mixing device for proportioning carbon nano tubes, which comprises a mixing tank, a feeding pipe and a discharging pipe are respectively arranged at the top and the bottom of the mixing tank, the material mixing device further comprises a stirring rod arranged in the mixing tank, a plurality of groups of stirring blades are arranged on the peripheral wall of the stirring rod, and the stirring blades are arranged in the mixing tank. The mixing tank is further provided with an inhibiting assembly used for inhibiting powder rising in the carbon nanotube mixing process, the inhibiting assembly comprises a fixing ring fixedly connected to the side wall of the mixing tank, the fixing ring is fixedly connected with a mounting tank, and the mounting tank is filled with a dimethylformamide solvent. Through the arrangement of the inhibition assembly, the surface of the carbon nano tube can be well wetted by utilizing the dimethylformamide solvent, the surface energy of the carbon nano tube can be reduced, and the weight of the wetted carbon nano tube can be obviously increased, so that the upward pitching phenomenon of the carbon nano tube caused by the influence of stirring airflow in the stirring process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carbon nanotube proportioning mixing technology field, concretely is a kind of carbon nanotube proportioning mixing device. BACKGROUND

[0002] Carbon nanotube proportioning mixing is an important link in the production process of carbon nanotube, and its purpose is to mix carbon nanotube with other materials according to certain proportion to obtain composite material with specific performance.

[0003] Since carbon nanotube generally has very small particle size, generally in nanometer level, such extremely small particles make its specific surface area very large, and surface energy is high, and the specific gravity of carbon nanotube is relatively light, when mixing polymer-based composite material, when the rotation of stirring paddle or the flow of air flow produces certain disturbance in mixing process, small and light carbon nanotube particles are easy to separate from mixing system and fly upwards, thereby causing uneven mixing of carbon nanotube particles and other materials such as polymer. SUMMARY

[0004] The utility model aims at providing a kind of carbon nanotube proportioning mixing device to solve the problem of powder updrafting when mixing carbon nanotube as described in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of carbon nanotube proportioning mixing device, including mixing tank, the top and bottom of the mixing tank are respectively provided with feed pipe and discharge pipe, further including the stirring rod being arranged in the mixing tank interior, the stirring rod peripheral wall is provided with multiple groups of stirring blades, the top of the mixing tank is equipped with motor, and the output end of the motor is connected with stirring rod, and the mixing tank is also equipped with inhibiting component for inhibiting powder updrafting in the mixing process of carbon nanotube;

[0006] The inhibiting component includes fixed ring fixedly connected to the side wall of mixing tank, the fixed ring is fixedly connected with installation jar, the installation jar is filled with dimethylformamide solvent, the top of the installation jar is equipped with liquid adding pipe, and the mixing tank is equipped with spraying assembly for spraying dimethylformamide solvent.

[0007] The pump is provided in the installation jar, and the output end of the pump is provided with liquid outlet pipe.

[0008] The spraying assembly comprises a mounting ring fixedly connected to the inner wall of the mixing tank, a plurality of mounting holes are formed in the mounting ring, each mounting hole is connected with a rotating plate through a rotating shaft, one end of each rotating plate away from the motor is fixedly connected with a circular plate, one side of each circular plate away from the rotating plate is fixedly connected with a spraying pipe, and the other end of each spraying pipe is fixedly connected with a spray head.

[0009] One side of each spraying pipe is fixedly connected with a connecting hose, the other end of each connecting hose is connected with the mounting ring, the mounting ring is provided with a flow cavity, and one end of each connecting hose and the liquid outlet pipe is in communication with the flow cavity.

[0010] The reset assembly comprises a reset pipe hinged to the side of the mounting ring close to the spray head, the reset pipe is slidably connected with a reset rod, one end of the reset rod is hinged to the circular plate, the other end of the reset rod is located in the reset pipe and is fixedly connected with a reset plate, one side of the reset plate away from the reset rod is fixedly connected with a spring, and the other end of the spring is connected with the bottom wall of the reset pipe.

[0011] The driving assembly comprises a plurality of driving rods fixedly connected to the side wall of the stirring rod, and one end of each driving rod away from the stirring rod is fixedly connected with a conical column.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The utility model discloses a spraying assembly of mixing tank for mixing carbon nanotube and polymer and other materials, comprising a mixing tank, a spraying assembly and a stirring assembly. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic diagram of the utility model;

[0015] Figure 2 It is the inside structure schematic diagram of the mixing tank of the utility model;

[0016] Figure 3 It is the driving assembly structure schematic diagram of the utility model;

[0017] Figure 4 It is the spraying assembly structure schematic diagram of the utility model;

[0018] Figure 5 For Figure 4 Enlarged view at A in Figure 1;

[0019] Figure 6 Structure diagram of rotating shaft and flow cavity of the utility model.

[0020] In the figure: 101, mixing tank; 102, feed pipe; 103, discharge pipe; 2, stirring rod; 3, stirring blade; 4, motor; 501, fixed ring; 502, mounting tank; 503, liquid outlet pipe; 504, liquid filling pipe; 601, mounting ring; 602, mounting hole; 603, rotating shaft; 604, rotating plate; 605, round plate; 606, spraying pipe; 607, spray head; 608, connecting hose; 609, flow cavity; 701, reset pipe; 702, reset rod; 703, reset plate; 704, spring; 801, drive rod; 802, conical column. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] Please refer to Figures 1-6 , a kind of carbon nanotube proportioning mixing device shown in the figure, including mixing tank 101, the top and bottom of mixing tank 101 are respectively provided with feed pipe 102 and discharge pipe 103, still including the stirring rod 2 set in the mixing tank 101, the multiple groups of stirring blades 3 are arranged on the wall of stirring rod 2, motor 4 is arranged on the top of mixing tank 101, the output end of motor 4 is connected with stirring rod 2, the inhibiting assembly for inhibiting the powder lifting in the mixing process of carbon nanotube is further arranged on mixing tank 101;

[0024] The inhibiting assembly includes fixed ring 501 fixedly connected to the side wall of mixing tank 101, the mounting tank 502 is fixedly connected to the fixed ring 501, the mounting tank 502 is filled with dimethylformamide solvent, the liquid filling pipe 504 is arranged on the top of mounting tank 502, the spraying assembly for spraying dimethylformamide solvent is arranged in the mixing tank 101, the pump is arranged in the mounting tank 502, and the output end of the pump is provided with liquid outlet pipe 503;

[0025] It should be noted that: through the setting of the spraying assembly, the spraying of the dimethylformamide solvent is realized, and the dimethylformamide solvent can better wet the surface of the carbon nanotube, reduce the surface energy, and the wet carbon nanotube can significantly increase its weight, thereby reducing the upward phenomenon of the carbon nanotube caused by the influence of the stirring airflow during the stirring process, thereby improving the uniformity of the distribution of the carbon nanotube in the polymer and other materials, and thereby improving the mixing effect with the polymer and other materials.

[0026] Please refer to Figures 2-6 , the spraying assembly in the figure includes a mounting ring 601 fixedly connected to the inner wall of the mixing tank 101, the mounting ring 601 is provided with a plurality of mounting holes 602, each mounting hole 602 is connected with a rotating plate 604 through a rotating shaft 603, one end of each rotating plate 604 away from the motor 4 is fixedly connected with a circular plate 605, one side of each circular plate 605 away from the rotating plate 604 is fixedly connected with a spraying pipe 606, the other end of each spraying pipe 606 is fixedly connected with a spray head 607, the mounting ring 601 is provided with a driving assembly for driving each spray head 607 and a resetting assembly for resetting each spray head 607 after being driven, one side of each spraying pipe 606 is fixedly connected with a connecting hose 608, the other end of each connecting hose 608 is connected with the mounting ring 601, the mounting ring 601 is provided with a flow-through cavity 609, one end of each connecting hose 608 and the liquid outlet pipe 503 is in communication with the flow-through cavity 609;

[0027] It should be noted that: through the setting of the spraying assembly, the spraying range of the dimethylformamide solvent is enlarged, thereby improving the uniformity of the spraying of the dimethylformamide solvent on the carbon nanotube.

[0028] Please refer to Figure 5 , the resetting assembly in the figure includes a resetting pipe 701 hinged to one side of the mounting ring 601 close to the spray head 607, the resetting pipe 701 is slidingly connected with a resetting rod 702, one end of the resetting rod 702 is hinged to the circular plate 605, the other end of the resetting rod 702 is located in the resetting pipe 701 and is fixedly connected with a resetting plate 703, one side of the resetting plate 703 away from the resetting rod 702 is fixedly connected with a spring 704, the other end of the spring 704 is connected with the bottom wall of the resetting pipe 701;

[0029] It should be noted that: through the setting of the resetting assembly, the spray head 607 is driven to reset after being stressed.

[0030] Working principle: when mixing polymer-based composite materials, first put carbon nanotubes and other materials such as polymers into the mixing tank 101 from the feed pipe 102 according to a certain proportion, then start the motor 4 to drive the stirring blades 3 on the stirring rod 2 to rotate, so that the carbon nanotubes and other materials such as polymers are mixed under the action of the rotation of the stirring blades 3;

[0031] And in the process of mixing, by starting the pump installed in the tank 502, the dimethylformamide solvent filled in the tank 502 is transported from the liquid outlet pipe 503 to the flow cavity 609 of the mounting ring 601, and finally sprayed from each nozzle 607 to the surface of the carbon nanotube, so that the dimethylformamide solvent can better wet the surface of the carbon nanotube, reduce its surface energy, and the wet carbon nanotube can significantly increase its weight, thereby reducing the upward phenomenon of the carbon nanotube caused by the influence of the stirring airflow during stirring, thereby improving the uniformity of the distribution of the carbon nanotube in the other materials such as polymers, and thereby improving the mixing effect with other materials such as polymers;

[0032] At the same time, in the process of mixing and spraying dimethylformamide solvent, the driving assembly is used to drive the nozzles 607 to reciprocally rotate, so as to expand the spraying range of dimethylformamide solvent during the reciprocating rotation of the nozzles 607, thereby improving the uniformity of spraying dimethylformamide solvent on the carbon nanotube;

[0033] After the mixing of the carbon nanotube and other materials such as polymers is completed, the mixture can be discharged from the discharge pipe 103. The mixture is dried. Since the dimethylformamide solvent has high volatility, it can be quickly evaporated from the composite material under appropriate conditions, such as heating and good ventilation, without leaving too much in the final mixed material. Even after the evaporation process, there may be a small amount of dimethylformamide solvent residue, but the residual amount is usually very low and does not significantly affect the performance of the mixed material. This is because the solubility of dimethylformamide solvent in polymer-based composite materials is relatively low, and it will be evaporated first during the evaporation process. Through experimental analysis, it can be found that after reasonable evaporation treatment, the residual amount of dimethylformamide solvent in the mixed material can be controlled to be less than one part per million, which has little effect on the mechanical properties and electrical properties of the material.

[0034] Example 2

[0035] Please refer to Figure 3 The embodiment further illustrates example 1. The driving assembly in the diagram includes a plurality of driving rods 801 fixedly connected to the side wall of the stirring rod 2, and a conical column 802 fixedly connected to the end of each driving rod 801 away from the stirring rod 2;

[0036] It should be pointed out here that: through the setting of the driving assembly, in the process of rotating the stirring rod 2, the tapered column 802 at one end of each driving rod 801 will be driven to rotate synchronously, in the process of rotating the tapered column 802, when the tapered column 802 abuts against the rotating plate 604, under the action of the interaction force and the guiding assembly of the reset assembly, the rotating plate 604 will be pushed to swing around the rotating shaft 603 as the center, thereby driving the nozzle 607 at one end of the spraying pipe 606 to swing, when the tapered column 802 passes the rotating plate 604, under the elastic action of the reset assembly, the rotating plate 604 will be reset, so that the tapered column 802 will abut against the rotating plate 604 repeatedly in the process of rotating, thereby under the pushing force and the guiding and resetting action of the reset assembly, the rotating plate 604 will swing repeatedly, thereby driving the nozzle 607 at one end of the spraying pipe 606 to swing repeatedly, so that in the process of the nozzle 607 swinging repeatedly, the spraying range of the dimethylformamide solvent is expanded, thereby improving the uniformity of spraying the dimethylformamide solvent on the carbon nanotube;

[0037] At the same time, in the process of the nozzle 607 swinging repeatedly, when the nozzle 607 is reset, it will collide at the rotating limit point, so that the nozzle 607 will vibrate, thereby under the vibration action, part of the powder attached to the surface of the nozzle 607 will be shaken off, thereby reducing the risk of the nozzle 607 being blocked by the powder.

[0038] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Accordingly, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A carbon nanotube mixing device, comprising: a mixing tank (101), the top and bottom of the mixing tank (101) are respectively provided with a feeding pipe (102) and a discharging pipe (103); characterized in that further comprising: a stirring rod (2) arranged in the mixing tank (101), a plurality of stirring blades (3) are arranged on the wall of the stirring rod (2), a motor (4) is arranged on the top of the mixing tank (101), the output end of the motor (4) is connected with the stirring rod (2), and a suppression assembly for suppressing the lifting of powder during the mixing of carbon nanotubes is further arranged on the mixing tank (101); the suppression assembly comprises a fixed ring (501) fixedly connected to the side wall of the mixing tank (101), the fixed ring (501) is fixedly connected with a mounting tank (502), the mounting tank (502) is filled with dimethylformamide solvent, the top of the mounting tank (502) is provided with a liquid adding pipe (504), and a spraying assembly for spraying the dimethylformamide solvent is arranged in the mixing tank (101).

2. The carbon nanotube proportioning mixing device according to claim 1, characterized in that: a pump is arranged in the mounting tank (502), and the output end of the pump is provided with a liquid outlet pipe (503).

3. The carbon nanotube proportioning mixing device according to claim 2, characterized in that: the spraying assembly comprises a mounting ring (601) fixedly connected to the inner wall of the mixing tank (101), a plurality of mounting holes (602) are formed in the mounting ring (601), each mounting hole (602) is connected with a rotating plate (604) through a rotating shaft (603), one end of each rotating plate (604) away from the motor (4) is fixedly connected with a circular plate (605), one side of each circular plate (605) away from the rotating plate (604) is fixedly connected with a spraying pipe (606), the other end of each spraying pipe (606) is fixedly connected with a spray head (607), the mounting ring (601) is provided with a driving assembly for driving each spray head (607) and a resetting assembly for resetting each spray head (607) after being driven.

4. The carbon nanotube proportioning mixing device according to claim 3, characterized in that: one side of each spraying pipe (606) is fixedly connected with a connecting hose (608), the other end of each connecting hose (608) is connected with the mounting ring (601), the mounting ring (601) is provided with a flow cavity (609), and one end of each connecting hose (608) and the liquid outlet pipe (503) is in communication with the flow cavity (609).

5. The carbon nanotube proportioning mixing device according to claim 4, characterized in that: the resetting assembly comprises a resetting pipe (701) hinged to one side of the mounting ring (601) close to the spray head (607), the resetting pipe (701) is slidingly connected with a resetting rod (702), one end of the resetting rod (702) is hinged with the circular plate (605), the other end of the resetting rod (702) is located in the resetting pipe (701) and is fixedly connected with a resetting plate (703), one side of the resetting plate (703) away from the resetting rod (702) is fixedly connected with a spring (704), and the other end of the spring (704) is connected with the bottom wall of the resetting pipe (701).

6. The carbon nanotube proportioning mixing device according to claim 5, characterized in that: The driving assembly comprises a plurality of driving rods (801) fixedly connected to the side wall of the stirring rod (2), and a conical column (802) is fixedly connected to one end of each driving rod (801) away from the stirring rod (2).

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