Push rod type nanotube production collector

Abstract

The utility model relates to the technical field of nanotube production, in particular to a push rod type nanotube production collector which comprises an outer tube, an inner tube, a catalyst feeding mechanism, a push rod mechanism and a gas inlet tube. A discharge hole is formed in the outer pipe; the inner pipe is arranged in the outer pipe, and an annular gap exists between the inner pipe and the outer pipe; the catalyst feeding mechanism can penetrate through the outer pipe to feed a catalyst into the opening in the end part of the inner pipe; the push rod mechanism can do piston motion in the inner pipe, and the catalyst can be accumulated on the push rod mechanism; the gas inlet pipe penetrates through the side wall of the outer pipe and is communicated to the inner pipe, so that inert gas, reducing gas and reaction carbon source gas can be introduced into the inner pipe. After the reaction is completed, the push rod mechanism pushes upwards, the nanotubes can fall out of the inner tube and can be collected at the lower end of the outer tube, the collection mode is very convenient, excessive human intervention is not needed, and therefore the preparation and collection efficiency of the nanotubes can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nanotube production, and particularly relates to a push-rod type nanotube production collector. Background Art

[0002] Carbon nanotubes are one-dimensional quantum materials with a special structure (radial dimension in the nanometer range, axial dimension in the micrometer range, and both ends of the tube are basically sealed). Carbon nanotubes are composed of several to dozens of coaxial circular tubes formed by carbon atoms arranged in a hexagonal pattern, and a fixed distance is maintained between layers. Carbon nanotubes are lightweight, with a perfect connection of the hexagonal structure, and have many extraordinary mechanical, electrical, and chemical properties. In recent years, with the in-depth research on carbon nanotubes and nanomaterials, their broad application prospects have been continuously demonstrated.

[0003] The main preparation method of carbon nanotubes is chemical vapor deposition. Carbon nanotubes are lightweight, conductive, thermally conductive, and have a certain viscosity. In traditional processes, for carbon nanotubes grown on a silicon wafer substrate, carbon nanotubes are usually collected by manual scraping. Such a collection method not only requires a lot of manpower and time, but also the collected carbon nanotubes are easily entangled together, affecting subsequent use.

[0004] Based on this, the utility model designs a push-rod type nanotube production collector to solve the above problems. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a push-rod type nanotube production collector to solve the problem of inconvenient collection during nanotube production.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the push-rod type nanotube production collector of the utility model includes:

[0009] An outer tube, on which a discharge port is provided;

[0010] An inner tube, which is arranged inside the outer tube, and there is an annular gap between the inner tube and the outer tube;

[0011] A catalyst feeding mechanism, which can penetrate the outer tube and feed the catalyst into the end opening of the inner tube;

[0012] A push-rod mechanism, which can perform a piston movement inside the inner tube, and the catalyst can accumulate on the push-rod mechanism;

[0013] An intake pipe that penetrates the side wall of the outer pipe and communicates with the inner pipe to introduce inert gas, reducing gas, and reactive carbon source gas into the inner pipe.

[0014] Optionally, the push-rod type nanotube production collector further includes a collection box that docks with the discharge port at the lower end of the outer pipe, and an air outlet pipe is provided on the collection box.

[0015] Optionally, an inclined connecting pipe is formed at the discharge port of the outer pipe, the collection box is docked with the lower end of the connecting pipe, and the air outlet pipe is provided at the top of the collection box.

[0016] Optionally, the collection box and the connecting pipe are detachably connected by a clamp or a plurality of buckles.

[0017] Optionally, the bottom of the inner pipe penetrates the side wall of the connecting pipe; the push-rod mechanism includes a piston part and a connecting rod part, the inner wall of the inner pipe is adapted to the piston part, and one end of the connecting rod part is connected to the piston part and the other end is connected to the driving component.

[0018] Optionally, the catalyst feeding mechanism includes a hopper and a feeding pipe. The hopper is located outside the outer pipe, the bottom of the hopper is connected to the feeding pipe, and the feeding pipe penetrates the top wall of the outer pipe to feed the catalyst into the end opening of the inner pipe.

[0019] Optionally, the bottom end of the feeding pipe is higher than the top end of the inner pipe.

[0020] Optionally, both the inner pipe and the outer pipe are circular pipes, and the annular gap is circular.

[0021] Optionally, the inert gas is argon, the reducing gas is hydrogen, and the reactive carbon source gas is any one of acetylene, methane, carbon monoxide, or ethylene.

[0022] Optionally, a heating mechanism is provided outside the outer pipe to enable the reaction temperature inside the inner pipe to be 600 - 900 °C.

[0023] (III) Beneficial effects

[0024] The push-rod type nanotube production collector of the present utility model, when the reaction conditions are reached, the catalyst falls from the catalyst feeding mechanism at the upper end through the top wall of the outer tube into the upper end opening of the inner tube and accumulates on the push-rod mechanism. The air inlet pipe directly provides a gas carbon source into the inner tube. When in an argon environment, the gas carbon source will crack into carbon atoms, and then carbon nanotubes will be deposited on the catalyst. After the reaction is completed, the push-rod mechanism pushes upward, and the nanotubes will fall outside the inner tube. The nanotubes will fall naturally due to gravity and can be collected at the lower end of the outer tube. This collection method is very convenient and does not require too much manual intervention, thus greatly improving the preparation and collection efficiency of nanotubes and meeting the development needs of the nanotube industry very well. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the push-rod type nanotube production collector of the present utility model;

[0026] Figure 2 is Figure 1 a schematic structural diagram of the push-rod type nanotube production collector in after the push-rod mechanism moves upward;

[0027] Figure 3 is Figure 1 a three-dimensional schematic diagram of a partial structure in ;

[0028] Figure 4 is Figure 3 a three-dimensional schematic diagram from another perspective of .

[0029]

Description of the Reference Numerals

[0030] 1: outer tube; 11: connecting tube;

[0031] 2: inner tube;

[0032] 3: catalyst feeding mechanism; 31: hopper; 32: guiding tube;

[0033] 4: push-rod mechanism; 41: piston part; 42: connecting rod part;

[0034] 5: air inlet pipe;

[0035] 6: collection box; 61: outlet pipe. Detailed Embodiment

[0036] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below with reference to the drawings through specific embodiments.

[0037] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, in the present utility model, the descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; "connection" may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] See Figures 1 to 4 , the present utility model provides a push rod type nanotube production collector, which specifically includes an outer tube 1, an inner tube 2, a catalyst feeding mechanism 3, a push rod mechanism 4, and an air inlet pipe 5. An outlet is provided on the outer tube 1. Specifically, the outer tube 1 can preferably be vertically arranged, and the outlet is located at the lower end of the outer tube 1 and the gas to be discharged can also flow through the outlet. The inner tube 2 is arranged inside the outer tube 1, and there is an annular gap between the inner tube 2 and the outer tube 1. Among them, the annular gap can be circular or square. When both the inner tube 2 and the outer tube 1 are preferably circular tubes, the inner tube 2 and the outer tube 1 are coaxially arranged. Therefore, the annular gap is circular. The catalyst feeding mechanism 3 can penetrate the outer tube 1 and send the catalyst into the end opening of the inner tube 2 to facilitate the replenishment of the catalyst. The push rod mechanism 4 can perform a piston movement inside the inner tube 2, and the catalyst can accumulate on the push rod mechanism 4 to prepare nanotubes. The air inlet pipe 5 penetrates the side wall of the outer tube 1 and communicates with the inner tube 2 to be able to introduce inert gas, reducing gas, and reaction carbon source gas into the inner tube 2. Among them, the inert gas can be argon or helium, etc., and is preferably argon; the reducing gas is hydrogen, and the reaction carbon source gas is any one of acetylene, methane, carbon monoxide, or ethylene, etc. In addition, a heating mechanism (not shown) for providing heat source is provided outside the outer tube 1 to enable the reaction temperature inside the inner tube 2 to be between 600 and 900 °C, so that the preparation of nanotubes can proceed smoothly.

[0041] This device is applicable to the reaction and collection of nanotubes (e.g., carbon nanotubes). The specific reaction conditions are as follows: the temperature ranges from 600 to 900 °C; hydrogen and acetylene are introduced into an argon atmosphere. After the reaction conditions are reached, the catalyst drops from the catalyst feeding mechanism 3 at the upper end through the top wall of the outer tube 1 into the upper opening of the inner tube 2 and accumulates on the push rod mechanism 4. The gas inlet pipe 5 directly provides the gas carbon source into the inner tube 2. When in an argon environment, the gas carbon source will crack into carbon atoms, and then carbon nanotubes will be deposited on the catalyst. After the reaction is completed, the push rod mechanism 4 pushes upward (see Figure 2 ), and the carbon nanotubes will drop outside the inner tube 2 (the annular gap between the inner tube 2 and the outer tube 1). The carbon nanotubes will naturally drop due to gravity and can be collected at the lower end of the outer tube 1. This collection method is very convenient and does not require excessive manual intervention, thus greatly improving the preparation and collection efficiency of carbon nanotubes, which well meets the development needs of the nanotube industry. It should be noted that even if there is a small amount of carbon nanotubes remaining on the push rod mechanism 4, it will not affect the subsequent preparation of carbon nanotubes. After the carbon nanotubes drop, the push rod mechanism 4 moves downward in the inner tube 2 (see Figure 1 ), and the catalyst powder falling from above continues to accumulate on the push rod mechanism 4, enabling the continuous preparation of carbon nanotubes.

[0042] In a preferred embodiment, the push rod type nanotube production and collector further includes a collection box 6. The collection box 6 is connected to the discharge port at the lower end of the outer tube 1. The collection box 6 can collect the dropped carbon nanotubes. An air outlet pipe 61 is provided on the collection box 6. There is only one air outlet pipe 61. Argon is continuously introduced from the gas inlet pipe 5, and the excess gas is discharged from the air outlet pipe 61 to ensure a stable air pressure in the argon atmosphere.

[0043] For the convenience of arranging each structure, the discharge port of the outer tube 1 is formed with an inclined connecting pipe 11. The collection box 6 is docked with the lower end of the connecting pipe 11, and an air outlet pipe 61 is provided at the top of the collection box 6. Among them, flange edges can be formed at the docking positions of the collection box 6 and the connecting pipe 11, and the collection box 6 and the connecting pipe 11 are detachably connected by a clamp or a plurality of buckles. Specifically, it can be that the clamp surrounds and wraps the docked flange edge, or it can also be that a plurality of buckles on the collection box 6 can buckle the flange edge on the connecting pipe 11, so that the collection box 6 and the connecting pipe 11 are detachably connected, and thus the collection box 6 can be conveniently replaced. Moreover, the bottom of the inner tube 2 penetrates the side wall of the connecting pipe 11. At this time, the connecting pipe 11 can also support and position the bottom of the inner tube 2. The push rod mechanism 4 includes a piston part 41 and a connecting rod part 42. The inner wall of the inner tube 2 is adapted to the piston part 41. The piston part 41 can block the inner wall of the inner tube 2 and can reciprocate axially in the inner tube 2. One end of the connecting rod part 42 is connected to the piston part 41 and the other end is connected to the drive assembly through the lower end of the inner tube 2. The drive assembly can include a motor and a gear-rack group, or include a motor and a worm and worm gear group, so as to be able to drive the connecting rod part 42 to perform a linear reciprocating motion, and the connecting rod part 42 can drive the piston part 41 to perform a piston motion in the inner tube 2.

[0044] In addition, the catalyst feeding mechanism 3 includes a hopper 31 and a feeding pipe 32. The hopper 31 is located outside the outer tube 1, and the bottom of the hopper 31 is connected to the feeding pipe 32. The feeding pipe 32 penetrates the top wall of the outer tube 1 to be able to feed the catalyst into the end opening of the inner tube 2 to meet the production requirements of carbon nanotubes. Among them, the bottom end of the feeding pipe 32 is higher than the top end of the inner tube 2 to avoid affecting the accumulation of the catalyst.

[0045] It should be understood that the above description of the specific embodiments of the present invention is only for explaining the technical route and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present invention should be covered by the protection scope of the present invention.

Claims

1. A push rod type nanotube production collector, characterized in that: It includes: An outer tube (1), wherein the outer tube (1) is provided with a discharge port; An inner tube (2), the inner tube (2) being arranged inside the outer tube (1), and an annular gap being present between the inner tube (2) and the outer tube (1); A catalyst feeding mechanism (3), wherein the catalyst feeding mechanism (3) is capable of penetrating the outer tube (1) and feeding the catalyst into the end opening of the inner tube (2); A push rod mechanism (4), wherein the push rod mechanism (4) can perform piston motion in the inner tube (2), and the catalyst can be deposited on the push rod mechanism (4); An air inlet pipe (5) passes through the side wall of the outer pipe (1) and is connected to the inner pipe (2) so as to be able to introduce inert gas, reducing gas and reactive carbon source gas into the inner pipe (2).

2. The push rod type nanotube production collector according to claim 1, characterized in that: The push rod type nanotube production collector further comprises a collection box (6), the collection box (6) being connected to the discharge port at the lower end of the outer tube (1), and an air outlet pipe (61) being provided on the collection box (6).

3. The push rod type nanotube production collector according to claim 2, characterized in that: The discharge port of the outer tube (1) is formed with an inclined connecting pipe (11), the collecting box (6) is butted against the lower end of the connecting pipe (11), and the top of the collecting box (6) is provided with the air outlet pipe (61).

4. The push rod type nanotube production collector according to claim 3, characterized in that: The collecting box (6) and the connecting pipe (11) are detachably connected via a clamp or a plurality of buckles.

5. The push rod type nanotube production collector according to claim 3, characterized in that: The bottom of the inner tube (2) passes through the side wall of the connecting tube (11); the push rod mechanism (4) comprises a piston part (41) and a connecting rod part (42); the inner wall of the inner tube (2) is adapted to the piston part (41); one end of the connecting rod part (42) is connected to the piston part (41) and the other end is connected to the driving component.

6. The push rod type nanotube production collector according to any one of claims 1 to 5, characterized in that: The catalyst feeding mechanism (3) comprises a hopper (31) and a feed pipe (32); the hopper (31) is located outside the outer tube (1); the bottom of the hopper (31) is connected to the feed pipe (32); the feed pipe (32) penetrates the top wall of the outer tube (1) and feeds the catalyst into the end opening of the inner tube (2).

7. The push rod type nanotube production collector according to claim 6, characterized in that: The bottom end of the feed guide tube (32) is higher than the top end of the inner tube (2).

8. The push rod type nanotube production collector according to any one of claims 1 to 5, characterized in that: The inner tube (2) and the outer tube (1) are both circular tubes, and the annular space is in the shape of a circular ring.

9. The push rod type nanotube production collector according to any one of claims 1 to 5, characterized in that: The inert gas is argon, the reducing gas is hydrogen, and the reactive carbon source gas is any one of acetylene, methane, carbon monoxide or ethylene.

10. The push rod type nanotube production collector according to any one of claims 1 to 5, characterized in that: A heating mechanism is arranged outside the outer tube (1) so as to enable the reaction temperature inside the inner tube (2) to be between 600°C and 900°C.

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