Single-walled carbon nanotube collecting and storage mechanism with adjustable volume and sampling function

Abstract

The present invention relates to the technical field of single-walled carbon nanotubes, and in particular to a single-walled carbon nanotube collection and storage mechanism with an adjustable volume and sampling function. The mechanism comprises a tank body, the interior of which is provided with a sealed space and a storage space distributed vertically. A top dynamic cover mechanism, a cylindrical extension, and a lifting piston form a compression space. The lifting piston is driven by the lifting mechanism to move. A vibration amplification mechanism connected to a guide rod contacts a dynamic support mechanism. The cylindrical extension is provided with an air and liquid supply flange, and the tank body is provided with an adjustment flange. The dynamic cover mechanism of the present invention can be switched to a collection mode (negative pressure powder suction when the piston moves downward), a discharge and ventilation mode (nitrogen blowing powder output), and a sampling mode (sealed sampling), thereby achieving adjustable volume storage, vibration dispersion, and non-destructive sampling of single-walled carbon nanotubes.

Description

Technical Field

[0001] The invention relates to the technical field of single-walled carbon nanotubes, in particular to a single-walled carbon nanotube receiving and storage mechanism with adjustable volume and sampling function. Background Art

[0002] Single-walled carbon nanotubes (SWCNTs) have significant applications in nanoelectronic devices and energy storage materials due to their high surface area, excellent conductivity, and mechanical properties. However, technical challenges in their storage have become a key bottleneck hindering their industrial application. These challenges are particularly evident in the following aspects: First, due to their extremely high surface energy, SWCNTs easily form micron-sized aggregates under the influence of van der Waals forces. Conventional storage systems lack integrated dynamic dispersion devices, resulting in a reduction in powder surface area by over 30% and conductivity by approximately 40% after agglomeration, severely impacting subsequent processing performance. Existing dispersion methods (such as manual stirring) are prone to introducing impurities and cannot be operated in a closed environment. Second, conventional storage devices often utilize open or semi-open feed structures, which are prone to powder loss during input (loss rates can reach 15-20%) and require frequent opening of the lid, leading to air intrusion and oxidation. Discharge relies on gravity flow, which often causes clogging for high-density SWCNT powders. Third, when the humidity of air exceeds 40%, SWCNTs absorb water, increasing their aggregation rate by 50% within 24 hours. Although existing storage devices utilize inert gas protection, they suffer from two major drawbacks: 1. The sealing structure is often a static O-ring seal, resulting in a gas permeability rate as high as 0.5 mL / h, which cannot meet long-term storage requirements. 2. Gas pressure control relies on manual valves, resulting in pressure fluctuations exceeding ±5 kPa, which can affect the dispersion of carbon nanotube bundles. 4. Existing storage devices have fixed volumes (e.g., 5L and 10L sizes). When the storage capacity is less than 20%, this waste of space increases in inert gas consumption by 40%. When the storage capacity is greater than 80%, the powder compaction density exceeds 0.8 g / cm³, requiring additional crushing for subsequent retrieval, reducing efficiency by 60%. 5. Traditional sampling requires opening the chamber and scooping or suctioning. During the sampling process, dust and moisture contaminate the sample, leading to data deviations exceeding 15%, and even material failure due to contamination. Existing sealed sampling devices often use a piston-pushing mechanism, which cannot avoid frictional losses between the powder and the piston surface during sampling (loss rate >5%). Summary of the Invention

[0003] The present invention aims to solve the above-mentioned defects and provides a single-walled carbon nanotube material collecting and storing mechanism with adjustable volume and sampling function.

[0004] In order to overcome the defects existing in the background technology, the technical solution adopted by the present invention to solve the technical problems thereof is: a single-walled carbon nanotube material collecting and storage mechanism with adjustable volume and sampling function, comprising a tank body, the interior of which is constructed with a closed space and a accommodating space distributed vertically, wherein the closed space is located above the accommodating space, the top of which is connected to a dynamic cover mechanism to configure the interior of the closed space into a closed structure, the bottom of the dynamic cover mechanism is connected to a cylindrical extension portion extending downward, the cylindrical extension portion is provided with a lifting piston that performs piston motion, and the lifting piston, the cylindrical extension portion and the dynamic cover mechanism cooperate to form a compression space for accommodating single-walled carbon nanotubes;

[0005] A main bearing is arranged vertically, and one end of the main bearing is connected to the lifting piston, and the other end is connected to the lifting mechanism installed in the accommodating space, and the lifting mechanism drives the lifting piston to move up and down;

[0006] A guide rod, one end of which is connected to the lifting piston, and the other end of which is downwardly passed into the accommodating space and connected to the vibration amplifying mechanism, wherein a dynamic support mechanism installed on the side wall of the accommodating space is provided below the vibration amplifying mechanism;

[0007] The cylindrical extension is provided with at least two gas and liquid supply flanges communicating with the compression space, the gas and liquid supply flanges are arranged adjacent to the dynamic cover mechanism, the gas and liquid supply flanges extend to the outside of the tank body, and the tank body is provided with at least two adjustment flanges communicating with the enclosed space;

[0008] The dynamic cover mechanism switches to a material receiving mode: the lifting mechanism drives the lifting piston downward to release the compression space, and a negative pressure environment is formed in the compression space, thereby generating suction to input the single-walled carbon nanotube powder into the compression space through the dynamic cover mechanism;

[0009] The dynamic cover mechanism switches to a discharge and ventilation mode: nitrogen is input through the air and liquid supply flange, the nitrogen blows the single-walled carbon nanotube powder into the air, and the single-walled carbon nanotube powder is discharged through the dynamic cover mechanism along with the nitrogen flow;

[0010] The dynamic cover mechanism switches to a sampling mode: the dynamic cover mechanism samples the single-walled carbon nanotube powder in the compression space.

[0011] A further improvement includes providing an annular protrusion structure on the inner wall of the cylindrical extension, and mounting a pressure sensor facing the supporting lifting piston on the annular protrusion.

[0012] A further improvement includes fitting a spiral piping system onto the inner wall of the enclosed space.

[0013] Further improvements include that the lifting mechanism includes a box body, a lifting support plate and a lifting motor installed under the box body, and through holes are respectively provided in the upper and lower parts of the box body for the main bearing to penetrate, and multiple lifting screws are arranged in the box body for vertical rotation, and the lifting screws are respectively coaxially connected to the output ends of the lifting motor, and the lifting screws are threadedly engaged with the lifting support plate to convert the rotational motion of the lifting screws into linear motion of the lifting support plate, and a cover is connected to the lifting support plate, and the cover shell and the lifting support plate cooperate to make the top plate move axially in the cover shell, and the main bearing is connected to the top plate through the opening on the axial end face of the cover shell.

[0014] A further improvement includes that the dynamic cover mechanism includes a cover body and a rotary lifting unit installed on the cover body, a main channel communicating with the compression space is axially penetrated through the cover body, a transition space perpendicularly intersecting the main channel is provided in the cover body, a plurality of inlet and outlet holes for communicating the transition space with the compression space are provided on the lower bottom surface of the cover body, a sealed piston and a feeding piston for piston movement are provided in the main channel, and the sealed piston and the feeding piston are connected by two connecting arc plates, the outer circumferential surface of the connecting arc plate is precisely fitted with the inner wall surface of the main channel, the top of the sealed piston is connected to the output end of the rotary lifting unit, and two feed flange parts and two air intake flange parts are symmetrically provided on the cover body;

[0015] When the rotary lifting unit drives the sealing piston and the feeding piston to move to the first position, the inner hole of the feed flange is fully connected to the main channel and the compression space, and the sealing piston completely covers the inner hole of the intake flange. When the lifting piston moves downward, negative pressure is generated in the compression space, so that the single-walled carbon nanotube powder is sucked into the compression space through the feed flange and the main channel;

[0016] When the rotary lifting unit drives the sealing piston and the feeding piston to move to the second position, the outer circumferential surface of the connecting arc plate completely covers the inner hole of the feeding flange, the upper end surface of the feeding piston is flush with the bottom surface of the transition space, and the inner hole of the air intake flange is in gas communication with the main channel, the transition space and the inlet and outlet holes. High-purity nitrogen enters the compression space, the inlet and outlet holes, the transition space and the main channel through the air and liquid supply flange, and is finally output from the air intake flange to replace the air in the compression space and output the single-walled carbon nanotube powder.

[0017] When the rotary lifting unit drives the sealing piston and the loading piston to move to the third position, the loading piston and the sealing piston synchronously retreat into the main channel, and the upper end face of the loading piston is precisely positioned to a position flush with the inner hole of the intake flange, and the loading piston completely covers the inner hole of the intake flange.

[0018] Further improvements include that the rotary lifting unit includes multiple opening and closing cylinders and a rotary motor, the opening and closing cylinders are vertically installed on the cover body, and the axis of the opening and closing cylinders is parallel to the main channel, the output end of the opening and closing cylinders is connected to the movable plate located above the main channel, and a rotary motor is installed on the movable plate, and the output end of the rotary motor is connected to the sealed piston, so as to realize the synchronous lifting and rotation of the sealed piston and the feeding piston.

[0019] A further improvement includes installing a locking mechanism on the cover body for positioning and locking the sealed piston.

[0020] A further improvement includes embedding a plurality of annular sealing rings on the surfaces of the sealing piston and the feeding piston respectively.

[0021] Further improvements include that the vibration amplification mechanism includes a lifting plate vertically connected to the guide rod, a vibration motor installed on the lifting plate, and a vibration spring, the lifting plate vertically passes through multiple vibration rods distributed parallel to the guide rod, both ends of the vibration rods are respectively connected to limit blocks for limiting the vibration stroke, and the vibration spring is sleeved on the vibration rod, and the vibration spring is located below the lifting plate.

[0022] Further improvements include that the dynamic support mechanism is provided with multiple groups, and the dynamic support mechanism includes a cam block, a support shaft, two side plates and a rotary support motor, the two side plates are symmetrically installed on the inner wall of the accommodating space, the support shaft is rotatably set between the two side plates, the output end of the rotary support motor is coaxially connected to the support shaft, and the support shaft passes through the cam block and is integrally formed with the cam block.

[0023] A further improvement includes embedding a first air pressure sensor in the dynamic cover mechanism to monitor the air pressure in the compression space in real time, and embedding a second air pressure sensor on the tank body to detect the air pressure in the enclosed space.

[0024] A further improvement includes providing an annular sealing gasket at the connection between the tank body and the dynamic cover mechanism for sealing the tank body.

[0025] The beneficial effects of the present invention are: in this design, the lifting piston cooperates with the cylindrical extension to form a variable compression space, and the volume adjustment range is 1:5. When the storage capacity is less than 20%, the space can be reduced to reduce gas consumption by 35%. When the storage capacity is greater than 80%, the space is released by the downward movement of the piston to avoid powder compaction; the pressure sensor can be used to monitor the weight of the powder, and cooperate with the lifting mechanism to automatically adjust the piston position to achieve "weight-volume" dynamic matching with an error of less than ±0.5%. The vibration amplification mechanism and the dynamic support mechanism work together to generate adjustable frequency vibration. The dynamic cover mechanism in this design can be switched to a material collection mode (negative pressure powder suction when the piston moves downward), a material discharge and ventilation mode (nitrogen powder blowing output), and a sampling mode (sealed sampling) to achieve adjustable volume storage, vibration dispersion and non-destructive sampling of single-walled carbon nanotubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Figure 1 It is a front cross-sectional view of the present invention;

[0028] Figure 2 is a top view of the present invention;

[0029] Figure 3 yes Figure 1 Middle A enlarged view;

[0030] Figure 4 It is a cross-sectional view of the dynamic cover mechanism in the material receiving mode of the present invention;

[0031] Figure 5 It is a cross-sectional view of the dynamic cover mechanism in the discharging and ventilation modes of the present invention;

[0032] Figure 6 is a cross-sectional view of the dynamic cover mechanism sampling mode of the present invention;

[0033] Figure 7 yes Figure 1 Middle B: Enlarged image;

[0034] Figure 8 This is a cross-sectional view of the connection position between the main bearing and the lifting mechanism in the present invention;

[0035] In the figure, 1-lifting mechanism, 2-vibration amplifying mechanism, 3-adjusting flange, 4-main bearing, 5-spiral piping system, 6-enclosed space, 7-dynamic cover mechanism, 8-first air pressure sensor, 9-sealing gasket, 10-air and liquid supply flange, 11-lifting piston, 12-tank body, 13-pressure sensor, 14-second air pressure sensor, 15-dynamic supporting mechanism, 16-accommodating space, 17-cylindrical extension, 18-guide rod;

[0036] 101-lifting motor, 102-lifting support plate, 103-box, 104-lifting screw, 105-through hole, 106-cover, 107-top plate;

[0037] 201-vibration motor, 202-vibration spring, 203-lifting plate, 204-vibration rod, 205-limiting block;

[0038] 701-transition space, 702-inlet flange, 703-cover body, 704-sealed piston, 705-moving plate, 706-rotating motor, 707-main channel, 708-opening and closing cylinder, 709-locking mechanism, 710-connecting arc plate, 711-feeding piston, 712-inlet and outlet holes, 713-feeding flange, 714-annular sealing ring;

[0039] 1501-rotation support motor, 1502-cam block, 1503-support shaft, 1504-side plate. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art without creative effort based on the embodiments of the present invention are within the scope of protection of the present invention.

[0041] refer to Figure 1 and Figure 2 A single-walled carbon nanotube collecting and storage mechanism with adjustable volume and sampling function includes a tank body 12, the interior of which is structured with a closed space 6 and a receiving space 16 distributed vertically, wherein the closed space 6 is located above the receiving space 16, and a dynamic cover mechanism 7 is connected to the top of the closed space 6 to form a closed structure inside the closed space 6, and the bottom of the dynamic cover mechanism 7 is connected to a cylindrical extension portion 17 extending downward, and a lifting piston 11 for piston movement is arranged in the cylindrical extension portion 17, and the lifting piston 11, the cylindrical extension portion 17 and the dynamic cover mechanism 7 cooperate to form a compression space for accommodating single-walled carbon nanotubes, and the volume of the compression space can be flexibly changed by adjusting the position of the lifting piston 11;

[0042] The main bearing 4 is arranged vertically, and one end of the main bearing 4 is connected to the lifting piston 11, and the other end is connected to the lifting mechanism 1 installed in the accommodating space 16, and the lifting mechanism 1 drives the lifting piston 11 to move up and down;

[0043] A guide rod 18 is connected to the lifting piston 11 at one end and extends downward into the accommodating space 16 at the other end to connect to the vibration amplification mechanism 2. A dynamic support mechanism 15 is provided below the vibration amplification mechanism 2 and is mounted on the sidewall of the accommodating space 16. The vibration generated by the vibration amplification mechanism 2 evenly disperses the single-walled carbon nanotube powder within the compression space. The dynamic support mechanism 15 can support or release the vibration amplification mechanism 2 through its movement. When oscillation dispersion is not required, the dynamic support mechanism 15 releases its support for the vibration amplification mechanism 2, allowing the vibration amplification mechanism 2 to rise and fall freely. When oscillation dispersion is required, support is restored. Furthermore, the guide rod 18 serves both to guide and support the lifting piston 11.

[0044] The cylindrical extension portion 17 is provided with at least two gas supply and liquid supply flange portions 10 that are in communication with the compression space. The gas supply and liquid supply flange portions 10 are arranged adjacent to the dynamic cover body mechanism 7. The gas supply and liquid supply flange portions 10 extend to the outside of the tank body 12, and the tank body 12 is provided with at least two adjustment flange portions 3 that are in communication with the confined space 6. The air in the confined space 6 is replaced by a "one in, one out" method. The specific operation is to introduce nitrogen into one of the adjustment flange portions 3, and the other adjustment flange portion 3 discharges the original air, thereby completing the ventilation process;

[0045] The dynamic cover mechanism 7 switches to the material receiving mode: the lifting mechanism 1 drives the lifting piston 11 downward to release the compression space, forming a negative pressure environment in the compression space. The generated suction force inputs the single-walled carbon nanotube powder into the compression space through the dynamic cover mechanism 7. As the volume of the compression space gradually increases, the internal air pressure decreases, which can effectively suppress the flying of the carbon nanotube powder;

[0046] The dynamic cover mechanism 7 switches to the discharge and ventilation mode: nitrogen is input through the air and liquid supply flange 10, and the nitrogen blows the single-walled carbon nanotube powder into the air. The single-walled carbon nanotube powder is discharged through the dynamic cover mechanism 7 along with the nitrogen flow;

[0047] The dynamic cover mechanism 7 switches to the sampling mode: the dynamic cover mechanism 7 samples the single-walled carbon nanotube powder in the compression space. During this sampling process, the air in the pores of the compression space will not come into contact with the external air and will always be in a closed state.

[0048] In this embodiment, in order to achieve accurate weighing of the single-walled carbon nanotube powder in the compression space, the following design is adopted: the inner wall of the cylindrical extension portion 17 is provided with an annular protrusion structure, and a pressure sensor 13 is installed on the annular protrusion, which is opposite to the supporting lifting piston 11. The pressure sensor 13 can be used to obtain the weight data of the single-walled carbon nanotube powder stored in the tank body 12.

[0049] In this embodiment, single-walled carbon nanotubes are suitable for storage at room temperature (20–25°C) and relative humidity (RH) <40%. Exposure to high temperatures (>100°C) or extreme low temperatures (<-20°C) should be avoided. High temperatures may cause the functional groups on the surface of the single-walled carbon nanotubes to decompose or induce oxidation reactions with oxygen in the air. Low temperatures may cause the dispersion to freeze, disrupting the nanotube dispersion. High humidity can also cause the single-walled carbon nanotubes to agglomerate due to water absorption, a phenomenon particularly pronounced in unmodified raw single-walled carbon nanotubes. To meet these storage requirements, a spiral piping system 5 is attached to the inner wall of the enclosed space 6. This system circulates cooling or heating gas to precisely control the temperature and humidity within the enclosed space 6, creating a stable microenvironment. Furthermore, the spiral piping design increases the contact area between the gas and the inner wall, improving heat exchange efficiency while also preventing local temperature and humidity fluctuations. This approach enables controlled storage of single-walled carbon nanotube powder, effectively preserving its stable physical and chemical properties.

[0050] In this embodiment, after comprehensive analysis, a spiral drive solution is adopted to select the device for driving the main bearing 4 to rise and fall. Compared with traditional hydraulic drive and pneumatic drive, this solution has significant advantages: hydraulic drive requires a hydraulic cylinder and a hydraulic station, which will significantly increase the overall height of the tank 12; and pneumatic drive has difficulty in providing stable and sufficient driving force when the single-walled carbon nanotube powder gradually fills and the load increases due to the high compressibility of gas. Figure 1 and Figure 8 The lifting mechanism 1 includes a box body 103, a lifting support plate 102 and a lifting motor 101 installed under the box body 103. The upper and lower parts of the box body 103 are respectively provided with through holes 105 for the main bearing 4 to penetrate. A plurality of lifting screws 104 are arranged in the box body 103 for vertical rotation. The lifting screws 104 are respectively coaxially connected to the output end of the lifting motor 101, and the lifting screws 104 are threadedly matched with the lifting support plate 102 to convert the rotational motion of the lifting screws 104 into linear motion of the lifting support plate 102. A cover 106 is connected to the lifting support plate 102, and the cover 106 cooperates with the lifting support plate 102 to make the top plate 107 move axially in the cover 106. The main bearing 4 is connected to the top plate 107 through the opening on the axial end face of the cover 106. This design effectively solves the compatibility problem of the lifting mechanism 1 and the vibration amplification mechanism 2.

[0051] In this embodiment, reference Figure 4 、 Figure 5 and Figure 6The dynamic cover mechanism 7 includes a cover body 703 and a rotating lifting unit installed on the cover body 703. A main channel 707 communicating with the compression space is axially opened on the cover body 703. A transition space 701 perpendicularly intersecting the main channel 707 is opened in the cover body 703. A plurality of inlet and outlet holes 712 for connecting the transition space 701 with the compression space are opened on the lower bottom surface of the cover body 703. A sealed piston 704 for piston movement and an upper The sealing piston 704 and the feeding piston 711 are connected by two connecting arc plates 710. The outer circumferential surface of the connecting arc plate 710 is precisely fitted with the inner wall surface of the main channel 707. The top of the sealing piston 704 is connected to the output end of the rotary lifting unit, and the rotary lifting unit drives the sealing piston 704 and the feeding piston 711 to move up and down and rotate axially. Two feeding flange parts 713 and two air inlet flange parts 702 are symmetrically provided on the cover body 703;

[0052] When the rotary lifting unit drives the sealing piston 704 and the feeding piston 711 to move to the first position, the system forms a material input channel, the inner hole of the feeding flange 713 is fully connected with the main channel 707 and the compression space, and the sealing piston 704 completely covers the inner hole of the intake flange 702, forming a closed air path. At this time, when the lifting piston 11 is started to move downward, the volume of the compression space gradually increases to form a negative pressure environment. Under the action of the pressure difference, the single-walled carbon nanotube powder enters the compression space through the feeding flange 713 and the main channel 707;

[0053] When the rotary lifting unit drives the sealing piston 704 and the feeding piston 711 to move to the second position, the outer circumferential surface of the connecting arc plate 710 completely covers the inner hole of the feeding flange portion 713, the upper end surface of the feeding piston 711 is flush with the bottom surface of the transition space 701, and the inner hole of the air inlet flange portion 702 is connected with the main channel 707, the transition space 701 and the inlet and outlet holes 712 to achieve gas path conduction. At this time, the gas supply system is started, and high-purity nitrogen enters the compression space through the gas and liquid supply flange portion 10, and then is output from the inlet and outlet holes 712, the transition space 701, the main channel 707 and the air inlet flange portion 702 to replace the air in the compression space and output the single-walled carbon nanotube powder, thereby preventing the single-walled carbon nanotube powder from being oxidized by contact with oxygen;

[0054] When the system enters the sampling mode, the rotary lifting unit drives the sealed piston 704 and the loading piston 711 to move to the third position, and the loading piston 711 and the sealed piston 704 synchronously retreat into the main channel 707. The upper end face of the loading piston 711 is precisely positioned to a position flush with the inner hole of the air inlet flange part 702, and the loading piston 711 completely covers the inner hole of the feed flange part 713 to form an independent sampling space. High-purity nitrogen is supplied to the system through one of the air inlet flange parts 702. Under the action of nitrogen pressure, the single-walled carbon nanotube powder attached to the upper surface of the loading piston 711 is blown away and enters the sampling pipeline with the air flow through the inner hole of the other air inlet flange part 702.

[0055] In a further embodiment, in order to enable the sealed piston 704 to be lifted up and down and rotated, refer to Figure 4 、 Figure 5 and Figure 6 The rotary lifting unit includes multiple opening and closing cylinders 708 and a rotary motor 706. The opening and closing cylinders 708 are vertically installed on the cover body 703, and the axis of the opening and closing cylinders 708 is parallel to the main channel 707. The output end of the opening and closing cylinder 708 is connected to the movable plate 705 located above the main channel 707, and the movable plate 705 is driven up and down by pneumatic means. A rotary motor 706 is installed on the movable plate 705, and the output end of the rotary motor 706 is connected to the sealing piston 704, so that the sealing piston 704 and the feeding piston 711 can be lifted up and down and rotated synchronously.

[0056] In a further embodiment, in order to prevent the lifting piston 11 from driving the sealing piston 704 to move under the force of air pressure when moving up and down, Figure 5 A locking mechanism 709 is installed on the cover body 703 for positioning and locking the sealing piston 704.

[0057] In a further embodiment, in order to prevent external air from entering the compression space, a plurality of annular sealing rings 714 are respectively embedded on the surfaces of the sealing piston 704 and the feeding piston 711 .

[0058] In this embodiment, reference Figure 3 The vibration amplification mechanism 2 includes a lifting plate 203 vertically connected to the guide rod 18, a vibration motor 201 installed on the lifting plate 203, and a vibration spring 202. The lifting plate 203 vertically passes through multiple vibration rods 204 distributed parallel to the guide rod 18. The two ends of the vibration rods 204 are respectively connected to limit blocks 205 for limiting the vibration stroke, and the vibration spring 202 is sleeved on the vibration rod 204. The vibration spring 202 is located below the lifting plate 203. This design enhances the vibration conduction efficiency through elastic deformation.

[0059] In this embodiment, reference Figure 7The dynamic support mechanism 15 is provided with multiple groups, and the dynamic support mechanism 15 includes a cam block 1502, a support shaft 1503, two side plates 1504 and a rotary support motor 1501. The two side plates 1504 are symmetrically installed on the inner wall of the accommodating space 16, serving as a fixed base for the support shaft 1503. The support shaft 1503 is rotatably arranged between the two side plates 1504. The output end of the rotary support motor 1501 is coaxially connected with the support shaft 1503. The support shaft 1503 passes through the cam block 1502 and is integrally formed with the cam block 1502. The cam block 1502 is driven to rotate by the rotary support motor 1501, and the cam block 1502 is used to support the vibration amplification mechanism 2. When support is not required, the cam block 1502 is driven to rotate to stagger the support point.

[0060] In this embodiment, the dynamic cover mechanism 7 is embedded with a first air pressure sensor 8 to monitor the air pressure in the compression space in real time, and the tank body 12 is embedded with a second air pressure sensor 14 for detecting the air pressure in the enclosed space 6. When the lifting piston 11 applies the rated pressure to the compression space, if the data of the first air pressure sensor 8 is stable and has no fluctuations, it indicates that the storage environment is airtight and external air cannot penetrate. Otherwise, leakage needs to be checked. Similarly, the same process detection is performed on the enclosed space 6. The dual-sensor collaborative monitoring mechanism can control the gas permeability to below 0.01mL / h, effectively preventing single-walled carbon nanotube powder from oxidation or crystal transformation due to the intrusion of external gas, and cooperating with the pressure compensation system to automatically balance the internal and external pressure differences, further ensuring the environmental stability during the storage of high-purity nanomaterials.

[0061] In this embodiment, an annular sealing gasket 9 is provided at the connection between the tank body 12 and the dynamic cover mechanism 7 for sealing the tank body 12. The purpose of designing the sealing gasket 9 is to prevent the entry of external air.

[0062] Working Principle: First, the lifting mechanism 1 drives the lifting piston 11 to move, compressing the compression space to its minimum volume, thereby preparing for material collection. Then, the dynamic cover mechanism 7 switches to the material collection mode: the rotary lifting unit drives the sealing piston 704 and the feeding piston 711 to the first position. At this time, the sealing piston 704 precisely blocks the inner hole of the air inlet flange 702, and the airflow containing the single-walled carbon nanotube powder enters the compression space in an orderly manner through the feeding flange 713 and the main channel 707. As the volume of the compression space gradually expands, the single-walled carbon nanotube powder quickly aggregates and settles under the action of gravity. At the same time, the fine powder floating in the space is also accelerated to settle due to the airflow disturbance caused by the volume change, ensuring efficient powder accumulation.

[0063] After powder deposition is complete, the dynamic cover mechanism 7 switches to the discharge and ventilation mode. The lifting and rotating unit drives the sealing piston 704 and the loading piston 711 to rotate synchronously, so that the connecting arc plate 710 completely covers the inner hole of the feed flange 713. Next, the lifting and rotating unit drives the two pistons upward. During this movement, the connecting arc plate 710 always remains covered, ensuring the airtightness of the system. When the two pistons move to the second position, the inner hole of the inlet flange 702 is connected to the main channel 707, the transition space 701, and the inlet and outlet holes 712. At this time, the external nitrogen source inputs high-pressure nitrogen through the gas and liquid supply flange 10. The strong airflow causes the single-walled carbon nanotube powder in the compression space to float again, forming a gas-solid two-phase flow. The powder is then discharged with the nitrogen gas through the inlet and outlet holes 712, the transition space 701, the main channel 707, and the inner hole of the inlet flange 702. At the same time, the lifting piston 11 slowly rises, making it easier for the high-pressure nitrogen to reach the single-walled carbon nanotube powder. In addition, dry nitrogen can be slowly introduced into the compression space through the air and liquid supply flange 10 to gradually replace the internal air and complete the sealed storage operation. When no operation is required, the sealing piston 704 only needs to be driven downward to cover the air inlet flange 702 to achieve complete sealing.

[0064] The dynamic cover mechanism 7 switches to the sampling mode, and the rotary lifting unit drives the sealed piston 704 and the loading piston 711 to move downward until the loading piston 711 is inserted into the carbon nanotube powder pile. The lower end can adopt a conical structure design to reduce the insertion resistance, which is convenient for accurate sampling. The powder sample is retained above the loading piston 711. After the sampling is completed, the two pistons move up synchronously, and the connecting arc plate 710 continues to cover the inner hole of the feed flange part 713 until the loading piston 711 reaches the third position. At this time, dry nitrogen is introduced into one of the air inlet flange parts 702, and the sampled powder can be blown out from the other air inlet flange part 702. This design realizes the function of periodic partial sampling, avoids the powder from contacting with pollutants such as oxygen, water vapor, dust in the air during the sampling process, and effectively ensures the purity of the material.

[0065] Since the single-walled carbon nanotube powder is not easy to blow out after agglomeration, it will remain in the compression space. An inert solvent (such as ethanol, acetone or deionized water, selected according to subsequent applications) is added to the compression space through the air and liquid supply flange 10 to form a 1~5 mg / mL suspension. Then the vibration amplification mechanism 2 generates high-frequency vibration to disperse the agglomerated single-walled carbon nanotube powder. The inert solvent is preferably ethanol, which is more volatile. By blowing dry nitrogen into the compression space and switching the dynamic cover mechanism to the ventilation and discharge mode, dry single-walled carbon nanotube powder is obtained.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function, characterized by: The invention comprises a tank body (12), the interior of which is structured with a closed space (6) and a receiving space (16) distributed vertically, wherein the closed space (6) is located above the receiving space (16), and a dynamic cover body mechanism (7) is connected to the top thereof to form the interior of the closed space (6) into a closed structure, and the bottom of the dynamic cover body mechanism (7) is connected to a cylindrical extension portion (17) extending downward, and a lifting piston (11) for piston movement is arranged in the cylindrical extension portion (17), and the lifting piston (11), the cylindrical extension portion (17) and the dynamic cover body mechanism (7) cooperate to form a compression space for receiving single-walled carbon nanotubes; A main bearing (4) is arranged vertically, and one end of the main bearing is connected to the lifting piston (11), and the other end is connected to the lifting mechanism (1) installed in the accommodating space (16), and the lifting mechanism (1) drives the lifting piston (11) to move up and down; A guide rod (18), one end of which is connected to the lifting piston (11), and the other end of which is downwardly passed into the accommodating space (16) and connected to the vibration amplifying mechanism (2); a dynamic support mechanism (15) installed on the side wall of the accommodating space (16) is provided below the vibration amplifying mechanism (2); The cylindrical extension portion (17) is provided with at least two air supply and liquid supply flange portions (10) in communication with the compression space, the air supply and liquid supply flange portions (10) are arranged adjacent to the dynamic cover body mechanism (7), the air supply and liquid supply flange portions (10) extend to the outside of the tank body (12), and the tank body (12) is provided with at least two adjustment flange portions (3) in communication with the enclosed space (6); The dynamic cover mechanism (7) switches to a material receiving mode: the lifting mechanism (1) drives the lifting piston (11) to move downward to release the compression space, and a negative pressure environment is formed in the compression space, thereby generating suction to input the single-walled carbon nanotube powder into the compression space through the dynamic cover mechanism (7); The dynamic cover mechanism (7) is switched to a discharge and ventilation mode: nitrogen is input through the air and liquid supply flange (10), the nitrogen blows the single-walled carbon nanotube powder into the air, and the single-walled carbon nanotube powder is output through the dynamic cover mechanism (7) along with the nitrogen flow; The dynamic cover mechanism (7) switches to a sampling mode: the dynamic cover mechanism (7) samples the single-walled carbon nanotube powder in the compression space; The dynamic cover mechanism (7) includes a cover body (703) and a rotating lifting unit installed on the cover body (703), a main channel (707) is axially opened on the cover body (703) and is connected to the compression space, a transition space (701) is opened in the cover body (703) and is perpendicular to the main channel (707), and a plurality of inlet and outlet holes (712) for connecting the transition space (701) and the compression space are opened on the bottom surface of the cover body (703). ) is provided with a closed piston (704) and a feeding piston (711) that perform piston motion, and the closed piston (704) and the feeding piston (711) are connected by two connecting arc plates (710), the outer circumferential surface of the connecting arc plate (710) is precisely fitted with the inner wall surface of the main channel (707), the top of the closed piston (704) is connected to the output end of the rotating lifting unit, and two feeding flange parts (713) and two air intake flange parts (702) are symmetrically provided on the cover body (703).

2. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function as claimed in claim 1, characterized in that: An annular protrusion structure is provided on the inner wall of the cylindrical extension portion (17), and a pressure sensor (13) facing the supporting lifting piston (11) is mounted on the annular protrusion.

3. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function as claimed in claim 1, characterized in that: A spiral piping system (5) is fitted onto the inner wall of the enclosed space (6).

4. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function according to claim 1, characterized in that: The lifting mechanism (1) includes a box body (103), a lifting support plate (102), and a lifting motor (101) installed below the box body (103). The box body (103) has through holes (105) at the upper and lower parts thereof for the main bearing (4) to penetrate therethrough. A plurality of lifting screws (104) are vertically rotated in the box body (103). The lifting screws (104) are coaxially connected to the output ends of the lifting motor (101). The lifting screws (104) are connected to the output ends of the lifting motor (101). The lifting support plate (102) is threadedly engaged to convert the rotational motion of the lifting screw (104) into the linear motion of the lifting support plate (102); a cover shell (106) is connected to the lifting support plate (102), and the cover shell (106) and the lifting support plate (102) are engaged to enable the top plate (107) to move axially in the cover shell (106); the main bearing (4) is connected to the top plate (107) through an opening on the axial end face of the cover shell (106).

5. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function as claimed in claim 1, characterized in that: When the rotary lifting unit drives the sealing piston (704) and the feeding piston (711) to move to the first position, the inner hole of the feeding flange (713) is fully connected to the main channel (707) and the compression space, and the sealing piston (704) completely covers the inner hole of the intake flange (702). When the lifting piston (11) moves downward, negative pressure is generated in the compression space, so that the single-walled carbon nanotube powder is sucked into the compression space through the feeding flange (713) and the main channel (707); When the rotary lifting unit drives the sealed piston (704) and the feeding piston (711) to move to the second position, the outer circumferential surface of the connecting arc plate (710) completely covers the inner hole of the feeding flange portion (713), the upper end surface of the feeding piston (711) is flush with the bottom surface of the transition space (701), and the inner hole of the air inlet flange portion (702) is connected to the main channel (707), the transition space (701) and the inlet and outlet holes (712) to achieve gas path conduction. High-purity nitrogen enters the compression space, the inlet and outlet holes (712), the transition space (701), the main channel (707) through the air and liquid supply flange portion (10) and is finally output from the air inlet flange portion (702) to replace the air in the compression space and output the single-walled carbon nanotube powder; When the rotary lifting unit drives the sealing piston (704) and the feeding piston (711) to move to the third position, the feeding piston (711) and the sealing piston (704) are synchronously retreated into the main channel (707), and the upper end surface of the feeding piston (711) is precisely positioned to a position flush with the inner hole of the intake flange part (702), and the feeding piston (711) completely covers the inner hole of the feed flange part (713).

6. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function as claimed in claim 5, characterized in that: The rotary lifting unit includes a plurality of opening and closing cylinders (708) and a rotary motor (706), wherein the opening and closing cylinders (708) are vertically mounted on the cover body (703), and the axis of the opening and closing cylinders (708) is parallel to the main channel (707), and the output end of the opening and closing cylinders (708) is connected to a movable plate (705) located above the main channel (707), and a rotary motor (706) is mounted on the movable plate (705), and the output end of the rotary motor (706) is connected to the sealing piston (704), so as to achieve synchronous lifting and rotation of the sealing piston (704) and the feeding piston (711).

7. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function as claimed in claim 5, characterized in that: A locking mechanism (709) is installed on the cover body (703) for positioning and locking the sealing piston (704).

8. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function as claimed in claim 1, characterized in that: The vibration amplification mechanism (2) comprises a lifting plate (203) vertically connected to the guide rod (18), a vibration motor (201) mounted on the lifting plate (203), and a vibration spring (202); a plurality of vibration rods (204) vertically extending through the lifting plate (203) and distributed parallel to the guide rod (18); both ends of the vibration rods (204) are respectively connected to limit blocks (205) for limiting the vibration stroke; and the vibration spring (202) is sleeved on the vibration rod (204); the vibration spring (202) is located below the lifting plate (203).

9. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function as claimed in claim 1, characterized in that: The dynamic support mechanism (15) is provided with multiple groups, and the dynamic support mechanism (15) includes a cam block (1502), a support shaft (1503), two side plates (1504) and a rotary support motor (1501), wherein the two side plates (1504) are symmetrically mounted on the inner side walls of the accommodating space (16), the support shaft (1503) is rotatably arranged between the two side plates (1504), the output end of the rotary support motor (1501) is coaxially connected to the support shaft (1503), and the support shaft (1503) passes through the cam block (1502) and is integrally formed with the cam block (1502).

10. The single-walled carbon nanotube collecting and storing mechanism with adjustable volume and sampling function according to claim 1 or 5, characterized in that: The dynamic cover mechanism (7) is embedded with a first air pressure sensor (8) to monitor the air pressure in the compression space in real time, and the tank body (12) is embedded with a second air pressure sensor (14) to detect the air pressure in the enclosed space (6).

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