Volume-adjustable single-walled carbon nanotube receiving and storing mechanism with sampling function

Abstract

The invention relates to the technical field of single-walled carbon nanotubes, in particular to a volume-adjustable single-walled carbon nanotube collecting and storing mechanism with a sampling function, which comprises a tank body, a closed space and an accommodating space which are distributed up and down are arranged in the tank body, and a top dynamic cover body mechanism, a cylindrical extension part and a lifting piston form a compression space. The lifting mechanism drives the lifting piston to move, the vibration amplifying mechanism connected with the guide rod makes contact with the dynamic supporting mechanism, the cylindrical extending part is provided with a gas and liquid supply flange part, and the tank body is provided with an adjusting flange part. The dynamic cover body mechanism can be switched to a material receiving mode (piston downward movement negative pressure powder suction), a discharging and ventilation mode (nitrogen powder blowing output) and a sampling mode (closed sampling), and adjustable volume storage, vibration dispersion and lossless sampling of the single-walled carbon nanotubes are achieved.

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 art, the technical solution adopted by the present invention to solve its technical problems is: a single-walled carbon nanotube feeding and storage mechanism with adjustable volume and sampling function, including a tank body, which is internally constructed with a sealed space and a receiving space distributed up and down, wherein the sealed space is located above the receiving space, and its top is connected with a dynamic cover mechanism to construct the interior of the sealed space into a sealed structure. The bottom of the dynamic cover mechanism is connected with a cylindrical extension part extending downward. An elevating piston moving in a piston manner is arranged in the cylindrical extension part. The elevating piston, the cylindrical extension part and the dynamic cover mechanism cooperate to form a compression space for accommodating single-walled carbon nanotubes; A main bearing, which is vertically arranged, and one end of which is connected with the elevating piston and the other end is connected with an elevating mechanism installed in the receiving space, and the elevating piston moves up and down by being driven by the elevating mechanism; A guide rod, one end of which is connected with the elevating piston and the other end of which penetrates downward into the receiving space and is connected with a vibration amplifying mechanism. A dynamic support mechanism is arranged on the side wall of the receiving space below the vibration amplifying mechanism; At least two gas supply and liquid supply flange parts communicating with the compression space are arranged on the cylindrical extension part. The gas supply and liquid supply flange parts are arranged adjacent to the dynamic cover mechanism. The gas supply and liquid supply flange parts extend to the outside of the tank body, and at least two adjusting flange parts communicating with the sealed space are arranged on the tank body; When the dynamic cover mechanism switches to the feeding mode: the elevating mechanism drives the elevating piston to move downward to release the compression space, and a negative pressure environment is formed in the compression space, so that the suction force generated sucks the single-walled carbon nanotube powder into the compression space through the dynamic cover mechanism; When the dynamic cover mechanism switches to the discharging and air exchange mode: nitrogen is input into the gas supply and liquid supply flange part, and 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 along with the nitrogen gas flow; When the dynamic cover mechanism switches to the sampling mode: the dynamic cover mechanism samples the single-walled carbon nanotube powder in the compression space.

[0005] A further improvement includes that the inner wall of the cylindrical extension part is provided with an annular convex structure, and a pressure sensor for supporting the elevating piston is installed on the annular convex.

[0006] A further improvement includes that a spiral pipe system is adhesively arranged on the inner wall of the sealed space.

[0007] Further improvements include that the lifting mechanism comprises a box body, a lifting support plate, and a lifting motor installed below the box body. Through holes are respectively opened in the upper and lower parts of the box body for the main bearings to pass through. Multiple lifting lead screws are vertically and rotatably arranged in the box body. The lifting lead screws are respectively coaxially connected to the output end of the lifting motor. The lifting lead screws are in threaded cooperation with the lifting support plate to convert the rotational motion of the lifting lead screws into the linear motion of the lifting support plate. A cover shell is connected to the lifting support plate, and the cover shell cooperates with the lifting support plate to enable the top plate to move axially within the cover shell. The main bearing is connected to the top plate through an opening on the axial end face of the cover shell.

[0008] Further improvements include that the dynamic cover body mechanism comprises 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 perpendicular to and intersecting with the main channel is opened in the cover body. A plurality of inlet and outlet holes for communicating the transition space with the compression space are opened on the bottom surface of the cover body. A sealed piston and a feeding piston performing piston motion are arranged in the main channel. 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. Two feeding flange parts and two air inlet flange parts are symmetrically arranged on the cover body. When the rotary lifting unit drives the sealed piston and the feeding piston to move to the first position, the inner hole of the feeding flange part is completely communicated with the main channel and the compression space. The sealed piston completely covers the inner hole of the air inlet flange part. 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 feeding flange part and the main channel. When the rotary lifting unit drives the sealed 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 part. The upper end surface of the feeding piston is flush with the bottom surface of the transition space. The inner hole of the air inlet flange part is in air path 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, the main channel, and finally is output from the air inlet flange part to displace the air in the compression space and output the single-walled carbon nanotube powder. When the rotary lifting unit drives the sealed piston and the feeding piston to move to the third position, the feeding piston and the sealed piston synchronously retract into the main channel. The upper end surface of the feeding piston is accurately positioned at a position flush with the inner hole of the air inlet flange part, and the feeding piston completely covers the inner hole of the feeding flange part.

[0009] 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.

[0010] A further improvement includes installing a locking mechanism on the cover body for positioning and locking the sealed piston.

[0011] A further improvement includes embedding a plurality of annular sealing rings on the surfaces of the sealing piston and the feeding piston respectively.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] A further improvement includes providing an annular sealing gasket for sealing the tank body at the connection between the tank body and the dynamic cover mechanism.

[0016] The beneficial effects of the present invention are as follows: In this design, the lifting piston cooperates with the cylindrical extension part to form a variable compression space, and the volume adjustment range reaches 1:5. When the storage capacity is <20%, the space can be reduced to reduce gas consumption by 35%. When the storage capacity is >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 powder weight, and cooperate with the lifting mechanism to automatically adjust the piston position to achieve "weight - volume" dynamic matching with an error of <±0.5%. The vibration amplification mechanism and the dynamic support mechanism work together to generate adjustable frequency vibrations. In this design, the dynamic cover mechanism can be switched to the powder collection mode (negative pressure powder suction when the piston moves down), the powder discharge and air exchange mode (nitrogen powder blowing output), and the sampling mode (closed sampling), realizing adjustable volume storage, vibration dispersion and non-destructive sampling of single-walled carbon nanotubes. Brief Description of the Drawings

[0017] The present invention will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 is the front sectional view of the present invention; Figure 2 is the top view of the present invention; Figure 3 is Figure 1 the enlarged view of A in Figure 4 is the sectional view of the powder collection mode of the dynamic cover mechanism in the present invention; Figure 5 is the sectional view of the powder discharge and air exchange mode of the dynamic cover mechanism in the present invention; Figure 6 is the sectional view of the sampling mode of the dynamic cover mechanism in the present invention; Figure 7 is Figure 1 the enlarged view of B in Figure 8 is the sectional view of the connection position between the main body bearing and the lifting mechanism in the present invention; In the figure, 1 - lifting mechanism, 2 - vibration amplification mechanism, 3 - adjusting flange part, 4 - main body bearing, 5 - spiral pipeline system, 6 - closed space, 7 - dynamic cover mechanism, 8 - first air pressure sensor, 9 - sealing gasket, 10 - air supply and liquid supply flange part, 11 - lifting piston, 12 - tank body, 13 - pressure sensor, 14 - second air pressure sensor, 15 - dynamic support mechanism, 16 - accommodation space, 17 - cylindrical extension part, 18 - guide rod; 101 - lifting motor, 102 - lifting support plate, 103 - box body, 104 - lifting lead screw, 105 - through hole, 106 - cover shell, 107 - top plate; 201 - vibration motor, 202 - vibration spring, 203 - lifting plate, 204 - vibration rod, 205 - limit block; 701 - Transition space, 702 - Intake flange part, 703 - Cover body, 704 - Sealing piston, 705 - Moving plate, 706 - Rotating motor, 707 - Main channel, 708 - Opening and closing cylinder, 709 - Locking mechanism, 710 - Connecting arc plate, 711 - Loading piston, 712 - Inlet and outlet hole, 713 - Feed flange part, 714 - Annular sealing ring; 1501 - Rotating support motor, 1502 - Cam block, 1503 - Support rotating shaft, 1504 - Side plate. Specific embodiments

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0020] Reference Figure 1 And Figure 2 , a single-walled carbon nanotube receiving and storing mechanism with adjustable volume and sampling function, including a tank body 12, which has a sealed space 6 and an accommodating space 16 distributed vertically inside, wherein the sealed space 6 is located above the accommodating space 16, and its top is connected with a dynamic cover mechanism 7 to construct the inside of the sealed space 6 into a sealed structure. The bottom of the dynamic cover mechanism 7 is connected with a downwardly extending cylindrical extension part 17, and a lifting piston 11 that moves in a piston manner is arranged inside the cylindrical extension part 17. The lifting piston 11, the cylindrical extension part 17, and the dynamic cover mechanism 7 cooperate to form a compression space for accommodating single-walled carbon nanotubes. By adjusting the position movement of the lifting piston 11, the volume of the compression space can be flexibly changed; The main body bearing 4 is vertically arranged, and one end of it is connected to the lifting piston 11 and the other end is connected to a lifting mechanism 1 installed in the accommodating space 16, and the lifting piston 11 is driven by the lifting mechanism 1 to move up and down; The guide rod 18, one end of which is connected to the lifting piston 11 and the other end passes downward into the accommodating space 16 and is connected to a vibration amplification mechanism 2. A dynamic support mechanism 15 is installed on the side wall of the accommodating space 16 below the vibration amplification mechanism 2. Through the vibration generated by the vibration amplification mechanism 2, the single-walled carbon nanotube powder in the compression space can be evenly dispersed. The dynamic support mechanism 15 can support or release the vibration amplification mechanism 2 through actions. When oscillation dispersion is not required, the dynamic support mechanism 15 releases the support for the vibration amplification mechanism 2, and the vibration amplification mechanism 2 can freely move up and down. When oscillation dispersion is required, the support is restored. In addition, the guide rod 18 also has the functions of guiding and supporting the lifting piston 11; At least two gas and liquid supply flange parts 10 communicating with the compression space are provided on the cylindrical extension part 17. The gas and liquid supply flange parts 10 are arranged adjacent to the dynamic cover body mechanism 7. The gas and liquid supply flange parts 10 extend to the outside of the tank body 12, and at least two adjustment flange parts 3 communicating with the closed space 6 are provided on the tank body 12. The air in the closed space 6 is replaced in the way of "one in and one out". The specific operation is to introduce nitrogen into one of the adjustment flange parts 3, and the original air is discharged from the other adjustment flange part 3 to complete the air exchange process; The dynamic cover body mechanism 7 switches to the material receiving mode: the lifting mechanism 1 drives the lifting piston 11 to move downward to release the compression space, a negative pressure environment is formed in the compression space, and the generated suction force inputs the single-walled carbon nanotube powder into the compression space through the dynamic cover body mechanism 7. As the volume of the compression space gradually increases and the internal air pressure decreases, the flying of the carbon nanotube powder can be effectively inhibited; The dynamic cover body mechanism 7 switches to the material discharging and air exchange mode: nitrogen is input into the gas and liquid supply flange part 10, and the nitrogen blows the single-walled carbon nanotube powder into the air. The single-walled carbon nanotube powder is output through the dynamic cover body mechanism 7 along with the nitrogen gas flow; The dynamic cover body mechanism 7 switches to the sampling mode: the dynamic cover body mechanism 7 samples the single-walled carbon nanotube powder in the compression space. During this sampling process, the air in the compression space does not contact the external air and is always in a closed state.

[0021] In this embodiment, in order to accurately weigh the single-walled carbon nanotube powder in the compression space, the following design is adopted. An annular convex structure is provided on the inner wall of the cylindrical extension part 17, and a pressure sensor 13 facing and supporting the lifting piston 11 is installed on the annular convex. The weight data of the single-walled carbon nanotube powder stored in the tank body 12 can be obtained by using the pressure sensor 13.

[0022] In this embodiment, single-walled carbon nanotubes are suitable for storage under the conditions of normal temperature (20–25 °C) and relative humidity (RH) < 40%. Exposure to high temperature (>100 °C) or extreme low temperature (< -20 °C) environments should be avoided. High temperature environments may cause the decomposition of surface functional groups on single-walled carbon nanotubes or promote their oxidation reaction with oxygen in the air; low temperature may cause the dispersion liquid to freeze, destroying the dispersed state of the nanotubes, while high humidity environments will cause single-walled carbon nanotubes to agglomerate due to water absorption, and this phenomenon is particularly obvious in unmodified raw single-walled carbon nanotubes. To meet the above storage requirements, a spiral pipe system 5 is attached to the inner wall of the sealed space 6. By using this system to circulate and transport refrigerating or heating gases, the temperature and humidity in the sealed space 6 are precisely regulated to form a stable microenvironment. In addition, the structural design of the spiral pipe increases the contact area between the gas and the inner wall, improves the heat exchange efficiency, and at the same time avoids local temperature and humidity fluctuations. In this way, the controllable storage of single-walled carbon nanotube powder is achieved, effectively protecting the stability of its physical and chemical properties.

[0023] In this embodiment, regarding the selection of the device for driving the lifting of the main bearing 4 of the driving body, after comprehensive analysis, a screw drive scheme is adopted. Compared with traditional hydraulic drive and pneumatic drive, this scheme has significant advantages: Hydraulic drive requires the installation of a hydraulic cylinder and a hydraulic station, which will significantly increase the overall height of the tank body 12; while pneumatic drive, due to the large compressibility of gas, it is difficult to provide a stable and sufficient driving force when the load increases due to the gradual filling of single-walled carbon nanotube powder. Refer to 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 below the box body 103. Through holes 105 are respectively opened in the upper and lower parts of the box body 103 for the main bearing 4 to pass through. A plurality of lifting lead screws 104 are vertically rotatably arranged in the box body 103. The lifting lead screws 104 are respectively coaxially connected to the output end of the lifting motor 101. The lifting lead screws 104 are in threaded cooperation with the lifting support plate 102, converting the rotational motion of the lifting lead screws 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 cooperates with the lifting support plate 102 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. This design effectively solves the compatibility problem between the lifting mechanism 1 and the vibration amplification mechanism 2.

[0024] In this embodiment, refer to Figure 4 、 Figure 5 and Figure 6, the dynamic cover mechanism 7 includes a cover body 703 and a rotary lifting unit installed on the cover body 703. An axial main channel 707 communicating with the compression space is provided through the cover body 703. A transition space 701 perpendicular to and intersecting with the main channel 707 is provided in the cover body 703. A plurality of inlet and outlet holes 712 for communicating the transition space 701 with the compression space are provided on the bottom surface of the cover body 703. A sealed piston 704 and a feeding piston 711 that move in a piston manner are provided in the main channel 707. The sealed 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 in precise fit with the inner wall surface of the main channel 707. The top of the sealed piston 704 is connected to the output end of the rotary lifting unit, so that the rotary lifting unit drives the sealed 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; When the rotary lifting unit drives the sealed piston 704 and the feeding piston 711 to move to the first position, a material input channel is formed in the system. The inner hole of the feeding flange part 713 is completely communicated with the main channel 707 and the compression space. The sealed piston 704 completely covers the inner hole of the air inlet flange part 702 to form an airtight gas 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 part 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 part 713. The upper end surface of the feeding piston 711 is flush with the bottom surface of the transition space 701. The inner hole of the air inlet flange part 702 is in gas path communication with the main channel 707, the transition space 701 and the inlet and outlet holes 712. At this time, when the gas supply system is started, high-purity nitrogen enters the compression space through the gas supply and liquid supply flange part 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 part 702 to displace the air in the compression space and output the single-walled carbon nanotube powder, so as to prevent the single-walled carbon nanotube powder from contacting oxygen and being oxidized; The system enters the sampling mode. 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 retract synchronously into the main channel 707. The upper end surface of the feeding piston 711 is accurately positioned flush with the inner hole of the air inlet flange portion 702, and the feeding piston 711 completely covers the inner hole of the feeding flange portion 713 to form an independent sampling space. High-purity nitrogen is supplied to the system through one of the air inlet flange portions 702. Under the action of the nitrogen pressure, the single-walled carbon nanotube powder attached to the upper surface of the feeding piston 711 is blown off and enters the sampling pipeline through the inner hole of the other air inlet flange portion 702 along with the air flow.

[0025] In a further embodiment, in order to enable the sealing piston 704 to move up and down and rotate, refer to Figure 4 、 Figure 5 and Figure 6 The rotary lifting unit includes a plurality of 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 cylinders 708 is connected to a moving plate 705 located above the main channel 707, and the moving plate 705 is driven to move up and down pneumatically. A rotary motor 706 is installed on the moving plate 705, and the output end of the rotary motor 706 is connected to the sealing piston 704, so as to realize the synchronous up and down movement and rotation of the sealing piston 704 and the feeding piston 711.

[0026] In a further embodiment, in order to prevent the sealing piston 704 from moving under the action of air pressure when the lifting piston 11 moves up and down, refer to Figure 5 A locking mechanism 709 is installed on the cover body 703 for positioning and locking the sealing piston 704.

[0027] 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.

[0028] In this embodiment, refer to Figure 3 The vibration amplification mechanism 2 includes a lifting plate 203 perpendicularly connected to the guide rod 18, a vibration motor 201 installed on the lifting plate 203, and a vibration spring 202. A plurality of vibration rods 204 parallel to the guide rod 18 penetrate vertically through the lifting plate 203. Limit blocks 205 are respectively connected to both ends of the vibration rods 204 to limit the vibration stroke, and the vibration spring 202 is sleeved on the vibration rods 204. The vibration spring 202 is located below the lifting plate 203. This design enhances the vibration conduction efficiency through elastic deformation.

[0029] In this embodiment, refer to 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] After the powder deposition is completed, the dynamic cover mechanism 7 switches to the discharging and air exchange mode. The lifting and rotating unit drives the sealing piston 704 and the feeding piston 711 to rotate synchronously, so that the connecting arc plate 710 completely covers the inner hole of the feeding flange portion 713. Immediately afterwards, the lifting and rotating unit drives the two pistons to move upward. During the movement, the connecting arc plate 710 always maintains the covering state to ensure the airtightness of the system. When the two pistons move to the second position, the inner hole of the air inlet flange portion 702 is communicated with the main channel 707, the transition space 701, and the inlet and outlet holes 712. At this time, the external nitrogen gas source inputs high-pressure nitrogen gas through the gas supply and liquid supply flange portion 10. The strong air flow makes the single-walled carbon nanotube powder in the compression space float up again, forming a gas-solid two-phase flow. Then the powder follows the nitrogen gas flow and is output through the inlet and outlet holes 712, the transition space 701, the main channel 707, and the inner hole of the air inlet flange portion 702. At the same time, the lifting piston 11 slowly rises to make it easier for the high-pressure nitrogen gas to blow onto the single-walled carbon nanotube powder. In addition, dry nitrogen gas can be slowly introduced into the compression space through the gas supply and liquid supply flange portion 10 to gradually replace the internal air and complete the sealed storage operation. When no operation is required, only by driving the sealing piston 704 downward to cover the air inlet flange portion 702 can complete sealing be achieved.

[0034] The dynamic cover mechanism 7 switches to the sampling mode. The rotating and lifting unit drives the sealing piston 704 and the feeding piston 711 to move downward until the feeding piston 711 is inserted into the carbon nanotube powder pile. The lower end of it can be designed with a conical structure to reduce the insertion resistance and facilitate accurate sampling. The powder sample remains above the feeding piston 711. After the sampling is completed, the two pistons move upward synchronously, and the connecting arc plate 710 continuously covers the inner hole of the feeding flange portion 713 until the feeding piston 711 reaches the third position. At this time, by introducing dry nitrogen gas into one of the air inlet flange portions 702, the sampled powder can be blown out from the other air inlet flange portion 702. This design realizes the function of regular partial sampling, avoids the contact of the powder with pollutants such as oxygen, water vapor, and dust in the air during the sampling process, and effectively guarantees the material purity.

[0035] Since the single-walled carbon nanotube powder is not easily blown 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 gas supply and liquid supply flange portion 10 to form a suspension with a concentration of 1 - 5 mg / mL. Then the vibration amplification mechanism 2 generates high-frequency vibration, and the agglomerated single-walled carbon nanotube powder is dispersed. The inert solvent is preferably ethanol which is more volatile. By blowing dry nitrogen gas into the compression space and switching the dynamic cover mechanism to the air exchange and discharging mode, dry single-walled carbon nanotube powder can be obtained.

[0036] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope 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.

2. The single-walled carbon nanotube material receiving and storing mechanism with adjustable volume and sampling function according to 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-wall carbon nanotube feeding and storage mechanism with adjustable volume and sampling function according to 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 material receiving 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). Through holes (105) are respectively opened in the upper and lower parts of the box body (103) for the main body bearing (4) to pass through. A plurality of lifting lead screws (104) are vertically and rotatably arranged in the box body (103). The lifting lead screws (104) are respectively coaxially connected to the output end of the lifting motor (101). The lifting lead screws (104) are in threaded cooperation with the lifting support plate (102), converting the rotational motion of the lifting lead screws (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) cooperates with the lifting support plate (102) to enable the top plate (107) to axially move in the cover shell (106). The main body 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: The dynamic cover body mechanism (7) includes a cover body (703) and a rotary lifting unit installed on the cover body (703). A main channel (707) communicating with the compression space is axially penetrated through the cover body (703). A transition space (701) perpendicular to and intersecting with the main channel (707) is opened in the cover body (703). A plurality of inlet and outlet holes (712) for communicating the transition space (701) with the compression space are opened on the bottom surface of the cover body (703). A sealed piston (704) and a feeding piston (711) performing piston motion are arranged in the main channel (707). The sealed 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 sealed piston (704) is connected to the output end of the rotary lifting unit. Two feeding flange parts (713) and two air inlet flange parts (702) are symmetrically arranged on the cover body (703); When the rotary lifting unit drives the sealed piston (704) and the feeding piston (711) to move to the first position, the inner hole of the feeding flange part (713) is completely communicated with the main channel (707) and the compression space. The sealed piston (704) completely covers the inner hole of the air inlet flange part (702). When the lifting piston (11) moves downward, a negative pressure is generated in the compression space, causing the single-walled carbon nanotube powder to be inhaled into the compression space through the feeding flange part (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 in gas path communication with the main channel (707), the transition space (701), and the inlet and outlet holes (712). High-purity nitrogen enters the compression space through the gas supply and liquid supply flange portion (10), the inlet and outlet holes (712), the transition space (701), the main channel (707), and finally outputs from the air inlet flange portion (702) to displace the air in the compression space and output the single-walled carbon nanotube powder. When the rotary lifting unit drives the sealed piston (704) and the feeding piston (711) to move to the third position, the feeding piston (711) and the sealed piston (704) synchronously retract into the main channel (707), the upper end surface of the feeding piston (711) is accurately positioned at a position flush with the inner hole of the air inlet flange portion (702), and the feeding piston (711) completely covers the inner hole of the feeding flange portion (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). The opening and closing cylinders (708) are vertically installed on the cover body (703), and the axes of the opening and closing cylinders (708) are parallel to the main channel (707). The output ends of the opening and closing cylinders (708) are connected to a moving plate (705) located above the main channel (707), and a rotary motor (706) is installed on the moving plate (705). The output end of the rotary motor (706) is connected to the sealed piston (704) to realize the synchronous up and down lifting and rotation of the sealed piston (704) and the feeding piston (711).

7. The single-walled carbon nanotube feeding and storage mechanism with adjustable volume and sampling function according to claim 5, characterized in that: A locking mechanism (709) is installed on the cover body (703) for positioning and locking the sealed piston (704).

8. The single-walled carbon nanotube material receiving and storing mechanism with adjustable volume and sampling function according to claim 1, characterized in that: 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). A plurality of vibration rods (204) parallel to the guide rod (18) vertically penetrate through the lifting plate (203). Limiting blocks (205) are respectively connected to both ends of the vibration rods (204) to limit the vibration stroke, and the vibration spring (202) is sleeved on the vibration rods (204), and 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: There are multiple groups of the dynamic support mechanisms (15). The dynamic support mechanism (15) includes a cam block (1502), a support rotating shaft (1503), two side plates (1504), and a rotating support motor (1501). The two side plates (1504) are symmetrically installed on the inner side walls of the accommodation space (16). The support rotating shaft (1503) is rotatably arranged between the two side plates (1504). The output end of the rotating support motor (1501) is coaxially connected to the support rotating shaft (1503). The support rotating shaft (1503) penetrates 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. The second air pressure sensor (14) is embedded on the tank body (12) for detecting the air pressure in the sealed space (6).

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