Multifunctional sampling device for single-walled carbon nanotube material

Abstract

The invention discloses a multifunctional sampling device for a single-walled carbon nanotube material, and relates to the technical field of auxiliary detection devices, the multifunctional sampling device comprises: a sampling port arranged above a conveying pipeline; the sampling barrel is fixedly connected to the sampling opening, and a piston is arranged in the sampling barrel in a sliding manner; the rotating rod is rotationally connected in the sampling barrel, the middle of the rotating rod is provided with a guide thread, the guide thread is in threaded connection with the piston, the upper end of the rotating rod extends to the outside of the sampling barrel, and the lower end of the rotating rod penetrates through the sampling opening and is connected to a sealing plug located below the sampling opening; the discharging groove is formed in the side wall of the sampling opening; the support is fixed outside the discharge chute; the sample tube is detachably mounted on the support, and one end of the sample tube is inserted into the discharge chute; according to the invention, accurate quantitative sampling, efficient screening and extraction of the single-walled carbon nanotube material are realized.

Description

Technical Field

[0001] The invention relates to the technical field of detection auxiliary devices, in particular to a multifunctional sampling device for single-walled carbon nanotube materials. Background Art

[0002] Single-walled carbon nanotubes (SWCNTs) have shown great application potential in many fields such as electronic devices, composite materials, energy storage and conversion, etc. due to their unique electrical, mechanical and thermal properties. In the industrial production process, single-walled carbon nanotube materials are usually transported through specific delivery pipelines to ensure the continuity and efficiency of the production process.

[0003] Sampling from the delivery pipeline is a key link in the quality control and performance evaluation of single-walled carbon nanotube materials. Through sampling, key indicators such as material purity, particle size distribution, and structural integrity can be monitored in real time, providing an important basis for subsequent scientific research experiments, process optimization, and product quality control. In addition, sampling can also help to promptly discover abnormal conditions in the production process, such as impurities mixed in, particle size deviation, etc., so that corresponding measures can be taken to make adjustments to ensure the stability and consistency of the product.

[0004] At present, the common method of sampling from the single-walled carbon nanotube material delivery pipeline is to extend the sampling device from the sampling port into the delivery pipeline. However, when the sampling port is opened, dust, impurities and other pollutants in the external environment can easily enter the delivery pipeline, causing pollution to the single-walled carbon nanotube material and affecting the purity and performance of the material.

[0005] The extension of the sampling device will occupy part of the space in the conveying pipeline, thus affecting the normal flow of materials, and may even cause pipeline blockage or interruption of material delivery, which will have an adverse effect on the continuity and stability of the production process. Existing sampling devices often lack precise quantitative control mechanisms, which makes it difficult to accurately control the sampling volume, easily causing waste or shortage of materials, and affecting the accuracy of subsequent experiments and evaluations. The particle size distribution range of single-walled carbon nanotube materials is wide, and existing sampling devices are usually unable to screen and extract materials of specific particle sizes as needed, limiting their scope of application in scientific research and production.

[0006] In summary, the existing technology for sampling from a single-walled carbon nanotube material delivery pipeline has many deficiencies, and there is an urgent need for a multifunctional sampling device that can overcome these defects, achieve accurate quantitative sampling, avoid material contamination and delivery interference, and can extract samples of a specific size. It is necessary to provide a multifunctional sampling device for single-walled carbon nanotube materials to solve the problems raised in the above background technology. Summary of the invention

[0007] To achieve the above object, the present invention provides the following technical solution: a multifunctional sampling device for single-walled carbon nanotube materials, comprising: A sampling port is arranged above the conveying pipeline; A sampling cylinder is fixedly connected to the sampling port, wherein a piston is slidably arranged inside the sampling cylinder; A rotating rod is rotatably connected in the sampling barrel, a guide thread is provided in the middle, the guide thread is connected to the piston thread, the upper end of the rotating rod extends to the outside of the sampling barrel, and the lower end penetrates the sampling port and is connected to a sealing plug located below the sampling port; A discharge chute, arranged on the side wall of the sampling port; A support, fixed outside the discharge chute; A sample tube is detachably mounted on the support, and one end of the sample tube is inserted into the discharge trough; A driving motor is fixed on the top of the sampling cylinder, and a sleeve is connected to the output end of the driving motor, and the sleeve is connected to the rotating rod in a slidable and rotation-restricted manner; A nut ring is fixed on the upper part of the sampling tube, and a single-circle thread is also provided on the upper part of the rotating rod, and the single-circle thread is threadedly connected with the nut ring; The lower end of the rotating rod is rotatably connected to the sealing plug.

[0008] Furthermore, the inner wall of the sampling tube is provided with a plurality of grooves, and the piston is embedded in the grooves.

[0009] Furthermore, a screening sleeve is rotatably provided on the inner wall of the sampling port at the position where the discharge chute is located, and a plurality of through holes symmetrical in pairs are opened on the side wall of the screening sleeve.

[0010] Furthermore, nano separation membranes with different pore sizes are installed in the through holes.

[0011] Furthermore, a circle of bevel gear ring is fixed on the outer wall of the screening sleeve, a bevel gear is rotatably arranged in the sampling port, the bevel gear is meshed with the bevel gear ring, and the rotating shaft of the bevel gear passes through the outside of the sampling port and is connected to the regulating motor.

[0012] Furthermore, a suction port is fixed to one end of the support away from the discharge chute, and the suction port is connected to a vacuum pump; The sample tube has openings at both ends, and the opening at one end away from the discharge trough is inserted into the suction port.

[0013] Furthermore, an air guide groove is provided on the side wall of the sampling port away from the discharge trough, and both the discharge trough and the air guide groove are inclined and tangent to the inner wall of the sampling port.

[0014] Furthermore, a one-way air-permeable membrane is provided in the air guide groove and the suction port.

[0015] Furthermore, a plurality of stirring blades are fixed to the rotating rod in a circumferentially distributed manner within the sampling port.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention can accurately control the sliding distance of the piston in the sampling tube by rotating the rotating rod, thereby realizing quantitative absorption and discharge of single-walled carbon nanotube materials, which not only improves the accuracy of sampling, but also avoids the waste of materials, and provides reliable data support for scientific research and production.

[0017] During the sampling process of the present invention, the opening and closing of the sealing plug ensures the connection and isolation between the sampling port and the conveying pipeline. Sampling by sliding the piston can prevent the sampling device from entering the conveying pipeline, thereby achieving interference-free online sampling without affecting the normal transportation of materials in the conveying pipeline.

[0018] The present invention uses a nano separation membrane in the screening sleeve to enable the device to screen out single-walled carbon nanotube materials of a specific size. By adjusting the motor to drive the screening sleeve to rotate, different through holes can be easily switched to achieve the extraction of materials with different particle sizes, meeting diverse experimental needs.

[0019] In the present invention, the vacuum pump generates negative pressure in the sample tube, which helps the material to quickly penetrate the nano separation membrane and enter the sample tube. Since the discharge trough and the air guide groove are tangent to the inner wall of the sampling port, and the through holes are symmetrical in pairs, the two through holes can be connected to the discharge trough and the air guide groove respectively, thereby generating a spiral airflow in the sampling port, improving the fluidity of the material, and effectively preventing the single-walled carbon nanotube material from being blocked and agglomerated during the sampling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a multifunctional sampling device for single-walled carbon nanotube materials; Figure 2 A schematic diagram of the internal structure of a multifunctional sampling device for single-walled carbon nanotube materials; Figure 3 A schematic diagram of the cross-sectional structure of a multifunctional sampling device for single-walled carbon nanotube materials; Figure 4 It is a schematic diagram of the cross-sectional structure at the sampling port in the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure at the sampling port of the present invention; In the figure: 1. sampling port; 2. sampling tube; 21. piston; 22. rotating rod; 221. guide thread; 222. single-turn thread; 23. sealing plug; 24. sleeve; 25. nut ring; 26. stirring blade; 3. discharge trough; 31. air guide trough; 4. support; 5. sample tube; 6. suction port; 7. vacuum pump; 8. driving motor; 9. screening sleeve; 91. through hole; 92. bevel gear ring; 93. bevel gear; 94. adjusting motor. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 5 In an embodiment of the present invention, a multifunctional sampling device for single-walled carbon nanotube materials includes: The sampling port 1 is arranged above the conveying pipeline; A sampling cylinder 2 is fixedly connected to the sampling port 1, wherein a piston 21 is slidably arranged inside the sampling cylinder 2; A rotating rod 22 is rotatably connected in the sampling tube 2, and a guide thread 221 is provided in the middle thereof. The guide thread 221 is threadedly connected to the piston 21. The upper end of the rotating rod 22 extends to the outside of the sampling tube 2, and the lower end penetrates the sampling port 1 and is connected to a sealing plug 23 located below the sampling port 1. A discharge trough 3 is arranged on the side wall of the sampling port 1; A support 4 is fixed outside the discharge chute 3; The sample tube 5 is detachably mounted on the support 4 , and one end of the sample tube 5 is inserted into the discharge trough 3 .

[0022] By rotating the rotating rod 22 to slide the piston 21 upward, when the sealing plug 23 opens the sampling port 1, the single-walled carbon nanotube material can be quantitatively drawn from the conveying pipeline into the sampling tube 2; and when the sealing plug 23 closes the sampling port 1, the rotating rod 22 is reversely operated to slide the piston 21 downward, so that the single-walled carbon nanotube material in the sampling tube 2 can be quantitatively discharged into the sample tube 5, thereby realizing the quantitative sampling function and ensuring that the normal conveyance of the single-walled carbon nanotube material in the conveying pipeline is not affected. The overall design of the device is compact and can be easily integrated into the existing single-walled carbon nanotube material conveying system to achieve interference-free online sampling.

[0023] In this embodiment, the inner wall of the sampling tube 2 is provided with a plurality of grooves, and the piston 21 is embedded in the grooves, thereby limiting the mutual rotation of the piston 21 and the sampling tube 2, and ensuring that the guide thread 221 can drive the piston 21 to slide when the rotating rod 22 rotates.

[0024] In this embodiment, a driving motor 8 is fixed on the top of the sampling tube 2, and a sleeve 24 is connected to the output end of the driving motor 8. The sleeve 24 is connected to the rotating rod 22 in a slidable and rotation-restricted manner; A nut ring 25 is fixed on the upper part of the sampling tube 2, and a single-circle thread 222 is also provided on the upper part of the rotating rod 22, and the single-circle thread 222 is threadedly connected with the nut ring 25; The lower end of the rotating rod 22 is rotatably connected to the sealing plug 23 .

[0025] When the rotation direction of the rotating rod 22 causes the piston 21 to slide upward, the rotating rod 22 slides downward along the nut ring 25 under the action of the single-turn thread 222 until the single-turn thread 222 is located below the nut ring 25. At this time, the sealing plug 23 also slides downward to open the sampling port 1, so that the single-walled carbon nanotube material in the conveying pipeline can be sucked into the sampling tube 2; When the rotation direction of the rotating rod 22 causes the piston 21 to slide downward, the rotating rod 22 slides upward along the nut ring 25 under the action of the single-turn thread 222 until the single-turn thread 222 is located above the nut ring 25. At this time, the sealing plug 23 also slides upward to close the sampling port 1, so that the single-walled carbon nanotube material in the sampling cylinder 2 is discharged from the discharge trough 3 into the sample tube 5, preventing the single-walled carbon nanotube material from returning to the conveying pipeline.

[0026] In this embodiment, a screening sleeve 9 is rotatably provided on the inner wall of the sampling port 1 at the position where the discharge trough 3 is located, and a plurality of through holes 91 symmetrically arranged in pairs are opened on the side wall of the screening sleeve 9 .

[0027] When the screening sleeve 9 is rotated so that the through hole 91 is aligned with the discharge trough 3, the sampling barrel 2 is connected with the sample tube 5, and the single-walled carbon nanotube material in the sampling barrel 2 can be discharged into the sample tube 5. When the screening sleeve 9 is rotated so that the through hole 91 is offset from the discharge trough 3, the sampling barrel 2 and the sample tube 5 are closed to each other, so that the sampling barrel 2 can only absorb the single-walled carbon nanotube material from the transmission pipeline.

[0028] In this embodiment, nano-separation membranes with different pore sizes are installed in the through holes 91 .

[0029] That is, when different through holes 91 are aligned with the discharge slot 3, single-walled carbon nanotube material smaller than the aperture can pass through the through holes 91 and enter the sample tube 5, so that single-walled carbon nanotube material samples of a specific size can be extracted.

[0030] In this embodiment, a circle of bevel gear ring 92 is fixed on the outer wall of the screening sleeve 9, and a bevel gear 93 is rotatably arranged in the sampling port 1. The bevel gear 93 is meshed with the bevel gear ring 92, and the rotating shaft of the bevel gear 93 passes through the outside of the sampling port 1 and is connected to the adjustment motor 94.

[0031] The screening sleeve 9 can be driven to rotate to different angles by adjusting the motor 94, so that the screening sleeve 9 can seal the discharge trough 3 or screen the sample.

[0032] In this embodiment, a suction port 6 is fixed to one end of the support 4 away from the discharge chute 3, and the suction port 6 is connected to a vacuum pump 7; The sample tube 5 has openings at both ends, and the opening at one end away from the discharge trough 3 is inserted into the suction port 6 .

[0033] That is, negative pressure can be generated in the sample tube 5 by the vacuum pump 7 , thereby helping the single-walled carbon nanotube material sample to penetrate the nano-separation membrane of the through hole 91 and enter the sample tube 5 .

[0034] In this embodiment, an air guide groove 31 is provided on the side wall of the sampling port 1 away from the discharge chute 3 . The discharge chute 3 and the air guide groove 31 are both inclined and tangent to the inner wall of the sampling port 1 .

[0035] In this embodiment, one-way air permeable membranes are provided in the air guide groove 31 and the suction port 6 .

[0036] That is, when the vacuum pump 7 generates negative pressure in the sample tube 5, the external air enters the sampling port 1 from the air guide groove 31. Since the discharge groove 3 and the air guide groove 31 are tangent to the inner wall of the sampling port 1, and the through holes 91 are symmetrical, the two through holes 91 can be connected to the discharge groove 3 and the air guide groove 31 respectively, thereby generating a spiral airflow in the sampling port 1, so that the single-walled carbon nanotube material in the sampling port 1 moves in a circular motion, avoiding clogging of the nano separation membrane in the through hole 91, and avoiding agglomeration of the single-walled carbon nanotube material, thereby improving the efficiency of the single-walled carbon nanotube material passing through the nano separation membrane; Furthermore, since the air guide groove 31 and the suction port 6 are both provided with a one-way air permeable membrane, the single-walled carbon nanotube material cannot pass through the air guide groove 31 and the suction port 6, thereby preventing the single-walled carbon nanotube material from leaking to the outside.

[0037] In this embodiment, a plurality of stirring blades 26 are fixed to the rotating rod 22 in a circumferentially distributed manner within the sampling port 1 .

[0038] When the single-walled carbon nanotube material passes through the sampling port 1 , it will be stirred by the stirring blade 26 to prevent it from agglomerating due to the compression of the piston 21 .

[0039] When implementing: The sleeve 24 and the rotating rod 22 are driven to rotate by the driving motor 8, so that the piston 21 slides in the sampling tube 2; The rotating rod 22 is rotated clockwise, and the rotating rod 22 slides downward along the nut ring 25 under the action of the single-turn thread 222 until the single-turn thread 222 is located below the nut ring 25. At this time, the sealing plug 23 moves downward with the rotating rod 22 to open the sampling port 1, allowing the single-walled carbon nanotube material in the conveying pipeline to enter the sampling cylinder 2; Continue to rotate the rotating rod 22 clockwise, and the piston 21 slides upward under the drive of the guide thread 221, so that the single-walled carbon nanotube material is sucked into the sampling tube 2. By determining the number of rotations of the rotating rod 22 or the position of the piston 21, the sampling amount can be accurately controlled; The rotating rod 22 is rotated counterclockwise, and the rotating rod 22 slides upward along the nut ring 25 under the action of the single-turn thread 222 until the single-turn thread 222 is located above the nut ring 25. At this time, the sealing plug 23 moves upward with the rotating rod 22 to close the sampling port 1 to prevent the material in the sampling tube 2 from flowing back into the conveying pipeline; Start the regulating motor 94 to drive the sieving sleeve 9 to rotate until the through hole 91 is aligned with the discharge slot 3, continue to rotate the rotating rod 22 counterclockwise, and the piston 21 slides downward to discharge the material in the sampling cylinder 2 into the sample tube 5 through the discharge slot 3 and the through hole 91 of the sieving sleeve 9. The nano separation membrane will screen out the single-walled carbon nanotube material of a specific size and enter the sample tube 5; The vacuum pump 7 is started during the downward sliding of the piston 21, generating negative pressure in the sample tube 5, helping the material to penetrate the nano-separation membrane and enter the sample tube 5. At the same time, external air enters the sampling port 1 through the air guide groove 31, generating a spiral airflow to prevent the material from clogging the through hole 91 and agglomerating. The air guide groove 31 and the one-way air permeable membrane in the suction port 6 ensure that the material will not leak from these two locations.

[0040] What has been described above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multifunctional sampling device for single-walled carbon nanotube materials, characterized in that: include: A sampling port (1) is arranged above the conveying pipeline; A sampling cylinder (2) is fixedly connected to the sampling port (1), wherein a piston (21) is slidably arranged inside the sampling cylinder (2); A rotating rod (22) is rotatably connected in the sampling tube (2), and a guide thread (221) is provided in the middle thereof. The guide thread (221) is threadably connected to the piston (21). The upper end of the rotating rod (22) extends to the outside of the sampling tube (2), while the lower end penetrates the sampling port (1) and is connected to a sealing plug (23) located below the sampling port (1); A discharge chute (3) arranged on a side wall of the sampling port (1); A support (4) fixed outside the discharge chute (3); A sample tube (5) is detachably mounted on the support (4), and one end of the sample tube is inserted into the discharge trough (3); A driving motor (8) is fixed on the top of the sampling cylinder (2), and a sleeve (24) is connected to the output end of the driving motor (8), and the sleeve (24) is connected to the rotating rod (22) in a slidable and rotationally restricted manner; A nut ring (25) is fixed on the upper part of the sampling tube (2), and a single-turn thread (222) is also provided on the upper part of the rotating rod (22), and the single-turn thread (222) is threadedly connected to the nut ring (25); The lower end of the rotating rod (22) is rotatably connected to the sealing plug (23).

2. A multifunctional sampling device for single-walled carbon nanotube materials according to claim 1, characterized in that: The inner wall of the sampling cylinder (2) is provided with a plurality of grooves, and the piston (21) is embedded in the grooves.

3. The multifunctional sampling device for single-walled carbon nanotube materials according to claim 1, characterized in that: A screening sleeve (9) is rotatably provided on the inner wall of the sampling port (1) at the position where the discharge trough (3) is located, and a plurality of through holes (91) symmetrical in pairs are provided on the side wall of the screening sleeve (9).

4. The multifunctional sampling device for single-walled carbon nanotube materials according to claim 3, characterized in that: Nano separation membranes with different pore sizes are installed in the through hole (91).

5. The multifunctional sampling device for single-walled carbon nanotube materials according to claim 3, characterized in that: A bevel gear ring (92) is fixed to the outer wall of the screening sleeve (9), and a bevel gear (93) is rotatably arranged inside the sampling port (1). The bevel gear (93) meshes with the bevel gear ring (92), and the rotating shaft of the bevel gear (93) passes through the outside of the sampling port (1) and is connected to the regulating motor (94).

6. The multifunctional sampling device for single-walled carbon nanotube materials according to claim 3, characterized in that: A suction port (6) is fixed to one end of the support (4) away from the discharge chute (3), and the suction port (6) is connected to a vacuum pump (7); The sample tube (5) has openings at both ends, and the opening at one end away from the discharge chute (3) is inserted into the suction port (6).

7. The multifunctional sampling device for single-walled carbon nanotube materials according to claim 6, characterized in that: An air guide groove (31) is provided on the side wall of the sampling port (1) away from the discharge trough (3); the discharge trough (3) and the air guide groove (31) are both arranged obliquely and are tangent to the inner wall of the sampling port (1).

8. The multifunctional sampling device for single-walled carbon nanotube materials according to claim 7, characterized in that: One-way air permeable membranes are provided in the air guide groove (31) and the suction port (6).

9. The multifunctional sampling device for single-walled carbon nanotube materials according to claim 1, characterized in that: The rotating rod (22) has a plurality of stirring blades (26) fixed thereto in a circumferentially distributed manner at a position within the sampling port (1).

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