Reaction device for high-performance multi-walled carbon nanotubes

Abstract

The utility model relates to the field of preparation of carbon nanotubes, and particularly discloses a reaction device of a high-performance multi-walled carbon nanotube, which comprises a sealed reaction box, an anode carbon rod, a cathode carbon rod, an anode carbon rod conveying device, a cathode carbon rod base and a scraper, the cathode carbon rod is mounted on the cathode carbon rod base, the cathode carbon rod base is positioned at the bottom of the inner side of the sealed reaction box, and the scraper is mounted on the anode carbon rod conveying device. The anode carbon rod conveying device comprises a conveying block, a first screw rod and an anode carbon rod fixing plate, the conveying block penetrates through the outer wall of the sealed reaction box, a conveying channel and a screw rod mounting channel are formed in the conveying block, one end of the first screw rod is rotationally connected into the screw rod mounting channel, and a connecting groove is formed between the conveying channel and the screw rod mounting channel; one side of the anode carbon rod fixing plate is in threaded connection with the first lead screw, the bottom of the anode carbon rod fixing plate is located in the conveying channel, an anode carbon rod is installed on the side face of the anode carbon rod fixing plate, and a sealing cover is arranged on the side, located outside the sealing reaction box, of the conveying block. The gap error between the anode carbon rod and the cathode carbon rod can be smaller, and the purity of the carbon nano tube after arc discharge is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to carbon nanotube preparation field, concretely relates to a kind of reaction device of high-performance multi-walled carbon nanotube. BACKGROUND

[0002] Arc discharge method is the main method used in existing multi-walled carbon nanotube preparation, and has the advantages of high generation efficiency, simple process parameters and high crystallinity. The main operation process of arc discharge method is to set two graphite rods as anode and cathode in vacuum cavity, then fill inert gas, then pass direct current to two graphite rods, and generate arc discharge effect between two graphite rods. In this process, the anode graphite rod will gradually evaporate and consume, and the generated graphite mist will condense on the surface of cathode graphite rod to form carbon nanotube.

[0003] Patent No. CN102502590B, a device for preparing multi-walled carbon nanotube based on arc discharge method, introduces a device specially used for preparing carbon nanotube by arc discharge method. The device improves the uniformity and quality of carbon nanotube by rotating the cathode graphite rod. However, the device uses a stepping motor to feed the anode graphite rod at the transmission device of the anode graphite rod, which may cause errors in the gap between the anode and cathode graphite rods and affect the sealing performance. Therefore, a reaction device is needed to solve this problem. UTILITY MODEL CONTENT

[0004] The utility model is to solve the technical problems mentioned in the above background technology, and proposes the following technical solutions:

[0005] A high-performance multi-walled carbon nanotube reaction device includes a sealed reaction chamber, an anode carbon rod, a cathode carbon rod, an anode carbon rod conveying device, a cathode carbon rod base, and a scraper. The cathode carbon rod base includes a rotating base and a rotating motor. The rotating motor is located at the bottom of the sealed reaction chamber, and the rotating base is located at the bottom inner side of the sealed reaction chamber. The rotating motor is connected to a rotating shaft, which passes through the sealed reaction chamber and is fixedly connected to the bottom of the rotating base. The cathode carbon rod is fixed on the rotating base. A scraper support rod is provided on the side of the sealed reaction chamber, and one end of the scraper support rod is connected to a scraper. The scraper is tangential to the cathode carbon rod. The anode carbon rod conveying device includes a transfer block. The system comprises a first lead screw and an anode carbon rod fixing plate. The transmission block passes through the outer wall of the sealed reaction chamber. The transmission block is provided with a transmission channel and a lead screw installation channel. One end of the first lead screw is rotatably connected in the lead screw installation channel. The transmission channel is a through hole. A first connecting groove is provided between the transmission channel and the lead screw installation channel. The anode carbon rod fixing plate is provided with a threaded hole. The top of the anode carbon rod fixing plate is located in the lead screw installation channel and is threadedly connected to the first lead screw through the threaded hole. The bottom of the anode carbon rod fixing plate is located in the transmission channel. The anode carbon rod is installed on the side of the anode carbon rod fixing plate. A sealing cover is provided on the side of the transmission block located outside the sealed reaction chamber.

[0006] Preferably, the sealing cap is provided with a handle.

[0007] Preferably, the transfer block is provided with a sealing head on one side inside the sealed reaction chamber. The sealing head is a barrel-shaped structure with one end open, and a through hole is provided in the middle of the sealing head. A rubber sealing ring is provided on the inner wall of the through hole.

[0008] Preferably, the sealed reaction chamber has a cavity at the top and a second connecting groove at the bottom, which communicates with the interior of the sealed reaction chamber. A second lead screw is installed inside the cavity, with one end rotatably connected to the cavity and the other end connected to a second motor. The second motor is fixed to the outer wall of the sealed reaction chamber. A movable block is fitted around the outer periphery of the second lead screw, and a slider is installed at the top of the movable block. A sliding groove is installed at the top of the cavity, and the slider is located in and slidably connected to the sliding groove. A scraper is connected to the bottom of the movable block, and the scraper is located inside the sealed reaction chamber and is tangent to the top of the sealed reaction chamber.

[0009] Preferably, rubber strips are provided on both sides of the second connecting groove.

[0010] The beneficial effects of this utility model are:

[0011] 1. The feeding operation of carbon rods is achieved by using a lead screw structure, which is more precise than stepper motors. This results in a smaller gap error between the anode and cathode carbon rods, and further improves the purity of carbon nanotubes after arc discharge.

[0012] 2. By setting a sealing head at the front end of the transmission block and a rubber sealing ring in the through hole of the sealing head, the sealing performance can be further improved, preventing air from entering the sealed reaction chamber and causing impurities in the carbon nanotubes after the reaction.

[0013] 3. By installing a scraper on the top inside the sealed reaction chamber and controlling the scraper's forward and backward movement via a screw structure, the carbon nanotubes condensed on the top of the sealed reaction chamber can be scraped off. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 2 for Figure 1 Enlarged view of the area circled in the middle;

[0016] Figure 3 This is a schematic diagram of the anode carbon rod conveying device in Embodiment 2 of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0018] Figure 5 for Figure 4 Enlarged view of the area circled in the middle.

[0019] In the diagram: 1. Sealed reaction chamber; 1-1. Cavity; 1-2. First connecting groove; 1-3. Sliding groove; 2. Anode carbon rod; 3. Cathode carbon rod; 4. Anode carbon rod conveying device; 4-1. Transmission block; 4-11. Transmission channel; 4-12. Screw mounting channel; 4-2. First screw; 4-3. Anode carbon rod fixing plate; 4-31. Threaded hole; 4-4. Second connecting groove; 5. Cathode carbon rod base; 5-1. Rotating base; 5-2. Rotary motor; 5-3. Rotating shaft; 6. Scraper; 7. Scraper support rod; 8. Sealing cover; 8-1. Handle; 9. Sealing head; 9-1. Through hole; 9-2. Rubber sealing ring; 10. Second screw; 11. Second motor; 12. Moving block; 12-1. Sliding block; 13. Scraper; 14. Rubber strip. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] In the description of this utility model, it should be understood that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The connection methods described by the terms "fixed connection" and "fixed setting" include, but are not limited to, "welding," "riveting," "adhesion," and "threaded connection." The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0022] The terms “upper,” “lower,” “front,” “back,” “left,” “right,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example 1

[0024] Reference Figures 1-2A high-performance multi-walled carbon nanotube reaction device includes a sealed reaction chamber 1, an anode carbon rod 2, a cathode carbon rod 3, an anode carbon rod conveying device 4, a cathode carbon rod base 5, and a scraper 6. The cathode carbon rod base 5 includes a rotating base 5-1 and a rotating motor 5-2. The rotating motor 5-2 is located at the bottom of the sealed reaction chamber 1, and the rotating base 5-1 is located at the bottom inner side of the sealed reaction chamber 1. The rotating motor 5-2 is connected to a rotating shaft 5-3, which passes through the sealed reaction chamber 1 and is fixedly connected to the bottom of the rotating base 5-1. The cathode carbon rod 3 is fixed on the rotating base 5-1. A scraper support rod 7 is provided on the side of the sealed reaction chamber 1, and one end of the scraper support rod 7 is connected to the scraper 6. The scraper 6 is tangent to the cathode carbon rod 3. The cathode carbon rod conveying device 4 includes a transmission block 4-1, a first lead screw 4-2, and an anode carbon rod. The fixed plate 4-3 and the transmission block 4-1 pass through the outer wall of the sealed reaction chamber 1. The transmission block 4-1 is provided with a transmission channel 4-11 and a screw mounting channel 4-12. One end of the first screw 4-2 is rotatably connected in the screw mounting channel 4-12. The transmission channel 4-11 is a through hole. A first connecting groove 4-4 is provided between the transmission channel 4-11 and the screw mounting channel 4-12. The anode carbon rod fixing plate 4-3 is provided with a threaded hole 4-31. The top of the anode carbon rod fixing plate 4-3 is located in the screw mounting channel 4-12 and is threadedly connected to the first screw 4-2 through the threaded hole 4-31. The bottom of the anode carbon rod fixing plate 4-3 is located in the transmission channel 4-11. The anode carbon rod 2 is installed on the side of the anode carbon rod fixing plate 4-3. A sealing cover 8 is provided on the side of the transmission block 4-1 located outside the sealed reaction chamber 1.

[0025] Preferably, a handle 8-1 is provided on the sealing cover 8.

[0026] In actual operation, S1, the operator first fixes the cathode carbon rod 3 on the rotating base 5-1, then removes the sealing cover 8, takes out the anode carbon rod fixing plate 4-3, then fixes the anode carbon rod 2 on the anode carbon rod fixing plate 4-3, then inserts the anode carbon rod fixing plate 4-3 into the transmission channel 4-11, so that the threaded hole 4-31 is threadedly connected to the first lead screw 4-2, and then covers it with the sealing cover.

[0027] S2. Next, use a vacuum pump to extract the air from the sealed reaction chamber 1, then inject helium into the sealed reaction chamber 1, then rotate the first lead screw 4-2 to adjust the gap between the anode carbon rod 2 and the cathode carbon rod 3, and finally connect the anode carbon rod 2 and the cathode carbon rod 3 to the arc power supply respectively.

[0028] S3. During the reaction, the self-rotating base 5-1 will rotate continuously under the action of the rotating motor 5-2. The scraper 6, which is tangent to the cathode carbon rod 3, will scrape off the carbon nanotubes condensed on the surface of the cathode carbon rod 3, so that the surface of the cathode carbon rod 3 remains smooth.

[0029] Example 2

[0030] Reference Figure 3 The transfer block 4-1 is located inside the sealed reaction chamber 1 and is equipped with a sealing head 9. The sealing head 9 is a barrel-shaped structure with one end open. A through hole 9-1 is provided in the middle of the sealing head 9, and a rubber sealing ring 9-2 is provided on the inner wall of the through hole 9-1.

[0031] Example 3

[0032] Reference Figures 4-5 A cavity 1-1 is provided at the top of the sealed reaction chamber 1, and a second connecting groove 1-2 is provided at the bottom of the cavity 1-1. The second connecting groove 1-2 communicates with the interior of the sealed reaction chamber 1. A second lead screw 10 is provided inside the cavity 1-1. One end of the second lead screw 10 is rotatably connected to the cavity 1-1, and the other end of the lead screw is connected to a second motor 11. The second motor 11 is fixed to the outer wall of the sealed reaction chamber 1. A moving block 12 is fitted around the outer periphery of the second lead screw 10. A slider 12-1 is provided at the top of the moving block 12. A sliding groove 1-3 is provided at the top of the cavity 1-1. The slider 12-1 is located in the sliding groove 1-3 and is slidably connected to the sliding groove 1-3. A scraper 13 is connected to the bottom of the moving block 12. The scraper 13 is located inside the sealed reaction chamber 1 and is tangent to the top of the sealed reaction chamber 1.

[0033] Preferably, rubber strips 14 are provided on both sides of the second connecting groove 1-2.

Claims

1. A high-performance multi-walled carbon nanotube reaction apparatus, comprising a sealed reaction chamber (1), an anode carbon rod (2), a cathode carbon rod (3), an anode carbon rod conveying device (4), a cathode carbon rod base (5), and a scraper (6), wherein the cathode carbon rod base (5) comprises a rotating base (5-1) and a rotating motor (5-2), the rotating motor (5-2) is located at the bottom of the sealed reaction chamber (1), the rotating base (5-1) is located at the bottom of the inner side of the sealed reaction chamber (1), the rotating motor (5-2) is connected to a rotating shaft (5-3), the rotating shaft (5-3) passes through the sealed reaction chamber (1) and is fixedly connected to the bottom of the rotating base (5-1), the cathode carbon rod (3) is fixed on the rotating base (5-1), a scraper support rod (7) is provided on the side of the sealed reaction chamber (1), one end of the scraper support rod (7) is connected to the scraper (6), and the scraper (6) is tangent to the cathode carbon rod (3), characterized in that, The anode carbon rod conveying device (4) includes a conveying block (4-1), a first lead screw (4-2), and an anode carbon rod fixing plate (4-3). The conveying block (4-1) passes through the outer wall of the sealed reaction chamber (1). The conveying block (4-1) is provided with a conveying channel (4-11) and a lead screw mounting channel (4-12). One end of the first lead screw (4-2) is rotatably connected in the lead screw mounting channel (4-12). The conveying channel (4-11) is a through hole. A first connection is provided between the conveying channel (4-11) and the lead screw mounting channel (4-12). The groove (4-4) has a threaded hole (4-31) on the anode carbon rod fixing plate (4-3). The top of the anode carbon rod fixing plate (4-3) is located in the lead screw installation channel (4-12) and is threadedly connected to the first lead screw (4-2) through the threaded hole (4-31). The bottom of the anode carbon rod fixing plate (4-3) is located in the transmission channel (4-11). The anode carbon rod (2) is installed on the side of the anode carbon rod fixing plate (4-3). The transmission block (4-1) is located on the outside of the sealed reaction box (1) and is provided with a sealing cover (8).

2. The reaction apparatus for high-performance multi-walled carbon nanotubes according to claim 1, characterized in that, The sealing cap (8) is provided with a handle (8-1).

3. The high-performance multi-walled carbon nanotube reaction device according to claim 2, characterized in that, The transfer block (4-1) is located inside the sealed reaction chamber (1) and is provided with a sealing head (9). The sealing head (9) is a barrel-shaped structure with one end open. A through hole (9-1) is provided in the middle of the sealing head (9). A rubber sealing ring (9-2) is provided on the inner wall of the through hole (9-1).

4. The reaction apparatus for high-performance multi-walled carbon nanotubes according to claim 2, characterized in that, The sealed reaction chamber (1) has a cavity (1-1) at the top and a second connecting groove (1-2) at the bottom. The second connecting groove (1-2) communicates with the interior of the sealed reaction chamber (1). A second lead screw (10) is installed inside the cavity (1-1). One end of the second lead screw (10) is rotatably connected to the cavity (1-1), and the other end of the lead screw is connected to a second motor (11). The second motor (11) is fixed to the outer wall of the sealed reaction chamber (1). The second lead screw (10) is fitted with a movable block (12) on its outer periphery. A slider (12-1) is provided on the top of the movable block (12). A groove (1-3) is provided on the top of the cavity (1-1). The slider (12-1) is located in the groove (1-3) and is slidably connected to the groove (1-3). A scraper (13) is connected to the bottom of the movable block (12). The scraper (13) is located inside the sealed reaction chamber (1) and is tangent to the top of the sealed reaction chamber (1).

5. The reaction apparatus for high-performance multi-walled carbon nanotubes according to claim 4, characterized in that, Rubber strips (14) are provided on both sides of the second connecting groove (1-2).

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