Graphene material detection sampling device

Abstract

The application relates to the technical field of graphene detection, in particular to a graphene material detection sampling device, which comprises a sampling pipe connected to the side wall of a production tank body through a flange and communicated with the inside of the production tank body through a sampling hole; a sampling piston is slidably connected in the sampling pipe and can slide to the sampling hole to block the sampling hole; a sliding pipe is connected to the sampling piston and penetrates the sampling piston and is slidably connected with the sampling pipe; a discharge pipe is installed on one side of the sliding pipe close to the production tank body; a dredging rod is slidably arranged in the sliding pipe and is in sealing and sliding connection with the inner wall of the sliding pipe; and a locking mechanism is arranged on the sliding pipe and connected with the dredging rod. The application reduces fluid resistance and abrasion, simplifies the sampling process, reduces equipment loss and maintenance cost, and overcomes the defects of long-term retention of the dredging rod and leakage of the piston sliding.

Description

Technical Field

[0001] This application relates to the technical field of graphene detection, and in particular to a graphene material detection and sampling device. Background Technology

[0002] Graphene, as a novel nanomaterial, has broad application prospects in energy, electronics, composite materials, and other fields. During graphene preparation, especially through chemical methods, real-time sampling and analysis are necessary to monitor the reaction process and product quality, such as detecting key parameters like the degree of graphene oxidation and viscosity. The convenience and accuracy of sampling directly affect subsequent process adjustments and product consistency; therefore, developing an efficient and reliable sampling device is crucial for the industrial production of graphene.

[0003] Currently, several graphene sampling devices exist in the prior art. For example, Chinese patent CN218156959U discloses a sampler and graphene production equipment. This sampler includes a sleeve body and a sampling section. The sleeve body has a cylindrical sampling chamber, with one end open and equipped with an inlet flange for connecting to a sampling port on a conveying pipeline. The sampling section includes a sampling piston, a unclogging rod, and a sampling handle. During operation, pulling the sampling handle drives the sampling piston to slide, drawing material from the inlet into the sampling chamber and then discharging it from the outlet, achieving non-stop sampling. Simultaneously, the unclogging rod moves with the piston to clear the sampling port and prevent blockage.

[0004] However, the aforementioned existing technologies still have some drawbacks: First, the unblocking rod needs to remain inside the pipe for extended periods, which can easily disrupt normal production processes, increase fluid resistance, and may wear down due to material erosion. Second, during production, material agitation or pressure fluctuations can easily cause the piston to slip unintentionally, leading to poor sealing of the sampling chamber and material leakage, which not only pollutes the environment but also affects sampling accuracy. Furthermore, the fixed connection of the unblocking rod limits the flexibility of maintenance and replacement, increasing equipment maintenance costs. Utility Model Content

[0005] This application provides a graphene material detection and sampling device, which can at least partially solve the above-mentioned technical problems.

[0006] This application provides a graphene material detection and sampling device, which adopts the following technical solution: A graphene material detection and sampling device, comprising: The sampling tube is connected to the side wall of the production tank via a flange and communicates with the inside of the production tank via a sampling hole; The sampling piston is slidably connected inside the sampling tube and can slide to the sampling hole to block the sampling hole; A sliding tube is connected to the sampling piston, passes through the sampling piston, and is slidably connected to the sampling tube; A discharge pipe is installed on the side of the sliding pipe near the production tank. The unblocking rod is slidably installed inside the sliding tube and is slidably and sealingly connected to the inner wall of the sliding tube; A locking mechanism is provided on the sliding tube and connected to the unblocking rod.

[0007] By adopting the above technical solution, the sampling tube is connected to the sampling hole on the side wall of the production tank through a flange, so as to achieve communication with the inside of the tank; the sampling piston slides inside the sampling tube. When it is necessary to block the sampling hole, the sliding tube is pushed to move the sampling piston to the sampling hole to form a seal; during sampling, the sliding tube is pulled to drive the sampling piston backward, and the material enters the sampling tube through the sampling hole; then the sliding tube is pushed and the material is discharged from the discharge pipe. The unblocking rod slides and seals within the sliding tube, its position fixed by a locking mechanism. If necessary, the unblocking rod can be pushed to clear the sampling hole; this enables non-stop sampling, avoiding production interruptions and improving sampling efficiency. The sampling piston can seal the sampling hole to prevent material leakage and ensure production safety. The unblocking rod can operate independently to clear the sampling hole, solving the problem of high viscosity and easy clogging of graphene materials. The locking mechanism fixes the position of the unblocking rod, preventing accidental movement and reducing fluid resistance and wear. The overall structure simplifies the sampling process, reduces equipment wear and maintenance costs, and overcomes the defects of long-term rod retention and piston sliding leakage in the prior art.

[0008] Optionally, the locking mechanism includes a locking ring, a stop block, and a locking block. Two stop blocks are provided and symmetrically arranged on the unblocking rod, and the stop blocks slide inside the sliding tube. The locking ring is located at the end of the sliding tube and has a clearance groove. The stop block slides through the clearance groove into the sliding tube. The locking block is located on the locking ring and has a snap-fit ​​groove on its side wall. The stop block slides out of the clearance groove and snaps into the snap-fit ​​groove.

[0009] By adopting the above technical solution, the locking mechanism consists of a locking ring, a stop block, and a locking block. During operation, the stop block slides with the unblocking rod inside the sliding tube, entering the sliding tube through the clearance groove on the locking ring. When the stop block slides out of the clearance groove, it engages with the snap-fit ​​groove on the locking block, thereby locking the position of the unblocking rod. To unlock, the unblocking rod is moved in the opposite direction, causing the stop block to return to the clearance groove. The engagement between the snap-fit ​​groove and the stop block provides a reliable locking mechanism, preventing the unblocking rod from accidentally shifting during production and ensuring the stability of the unblocking operation. The symmetrically arranged stop blocks and clearance grooves make locking and unlocking operations simple and quick, reducing manual intervention time. This locking mechanism enhances the reliability of the overall device, avoids interference with the production process by the unblocking rod, and solves the maintenance inconvenience problem caused by the fixed connection of the unblocking rod in the prior art.

[0010] Optionally, a fixing plate is provided at the end of the sampling tube, and the sliding tube is threadedly connected to the fixing plate.

[0011] By adopting the above technical solution, a fixed plate is set at the end of the sampling tube, and the sliding tube is connected to the fixed plate by a thread. During operation, rotating the sliding tube can adjust its position relative to the fixed plate, thereby fine-tuning the initial position of the sampling piston and the unblocking rod. The threaded connection allows for fine-tuning of the sliding tube, ensuring that the sampling piston can accurately block the sampling hole, improving sealing and sampling accuracy. The fixed plate enhances the rigidity of the end of the sampling tube, preventing the sliding tube from shaking and reducing the risk of accidental piston slippage. It achieves coordinated positioning of the unblocking rod and the sampling piston, further preventing leakage and improving the overall durability of the device.

[0012] Optionally, a limiting ring is provided on the unblocking rod, the limiting ring slides inside the sliding tube and can abut against the side of the locking ring near the production tank; a return spring is provided between the sliding tube and the unblocking rod, the return spring is connected to the limiting ring and pushes the limiting ring closer to the locking ring.

[0013] By adopting the above technical solution, a limiting ring is set on the unblocking rod. The limiting ring slides inside the sliding tube and can abut against the locking ring. A return spring connects the limiting ring and the sliding tube, pushing the limiting ring towards the locking ring. When the unblocking rod moves, the limiting ring restricts its stroke. After the unblocking rod is released, the return spring automatically returns it to its initial position. The return spring ensures that the unblocking rod automatically retracts after unblocking, avoiding its long-term retention in the pipe and reducing fluid resistance and material scouring and wear. The limiting ring restricts the movement range of the unblocking rod, preventing excessive extension that could damage the equipment or cause blockage. The return spring makes locking and unlocking operations smoother, improves operating efficiency, and solves the problem of unblocking rod retention in the prior art.

[0014] Optionally, the sliding tube is provided with a sealing mechanism, which includes a connecting seat, an expansion ring, a flexible seal, and a driving assembly. The connecting seat connects the sliding tube and the sampling piston. The flexible seal is disposed on the sampling piston and extends to the periphery of the connecting seat. Multiple expansion rings are disposed and slide on the connecting seat. The expansion rings are connected to the flexible seal. The driving component is disposed on the sliding tube and the expansion ring, and is used to drive the expansion ring to slide.

[0015] By adopting the above technical solution, the sealing mechanism includes a connecting seat, an expansion ring, a flexible seal, and a drive assembly; the connecting seat connects the sliding tube and the sampling piston. When the drive assembly operates, it drives the expansion ring to slide on the connecting seat, causing the flexible seal to expand or contract, thereby enhancing the seal with the inner wall of the sampling tube. The flexible seal and expansion ring provide dynamic sealing capability, adapting to changes in the inner wall of the sampling tube and effectively preventing material leakage, especially during production pressure fluctuations. The drive assembly allows for adjustment of the sealing pressure as needed, improving the reliability and adaptability of the seal. It ensures that the sealing mechanism remains effective after the unblocking rod is reset, solving the leakage problem caused by accidental piston slippage in the prior art, improving sampling accuracy, and simultaneously cleaning the inner wall of the sampling tube, reducing material retention and keeping the inside of the sampling tube clean.

[0016] Optionally, the driving assembly includes a driving rod and a driving block. The driving rod slides along the length of the sliding tube on the side wall of the sliding tube, and the driving block slides radially along the connecting seat. The driving rod abuts against the side wall of the driving block, and a driving groove is provided on the side wall of the driving block. When the driving rod is pressed close to the connecting seat, the driving rod drives the driving block through the driving groove to drive the expansion ring close to the inner wall of the sampling tube.

[0017] By adopting the above technical solution, the driving assembly includes a driving rod and a driving block. The driving rod slides along the length of the sliding tube and abuts against the side wall of the driving block. When the driving rod is pressed, the driving block moves radially through the driving groove, driving the expansion ring closer to the inner wall of the sampling tube, causing the flexible seal to expand. The driving groove converts linear motion into radial motion, realizing rapid activation of the sealing mechanism, and making operation simple and labor-saving. The sliding of the driving rod allows for precise control of the sealing degree, avoiding seal failure caused by excessive tightness or looseness. This driving assembly improves the response speed, ensuring timely sealing during sampling and reducing the risk of leakage.

[0018] Optionally, the drive assembly further includes a locking nut, which is threaded onto the sliding tube and abuts against the drive rod.

[0019] By adopting the above technical solution, the drive assembly also includes a locking nut, which is threaded onto the sliding tube and abuts against the drive rod. Rotating the locking nut can fix the position of the drive rod and prevent it from moving accidentally. The locking nut provides an additional fixing mechanism to ensure that the drive rod remains stable in the set position, thereby maintaining the sealing state. The threaded connection allows for fine adjustment of the abutment pressure of the drive rod, optimizing the sealing performance. This enhances the reliability of the sealing mechanism, prevents sealing failure due to vibration or pressure changes, and further improves the safety of the device.

[0020] Optionally, a cleaning port is provided on the side wall of the sampling tube, the cleaning port being located behind the initial position of the sampling piston and equipped with a removable sealing cap.

[0021] By adopting the above technical solution, a cleaning port is opened on the side wall of the sampling tube, located behind the initial position of the sampling piston, and equipped with a removable sealing cap. After sampling, the sealing cap is opened, and a water pipe is connected to flush the inside of the sampling tube to remove residual materials. The cleaning port facilitates direct flushing of the sampling tube, preventing material residue and cross-contamination, and reducing the risk of blockage. The removable sealing cap makes cleaning operations simple and quick, reducing maintenance costs and time. The cleaning port ensures the hygiene and reliability of the device for long-term use, solving the problem of inconvenient maintenance in the prior art.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The unblocking rod can be operated independently to unclog the sampling hole, solving the problem of easy clogging caused by the high viscosity of graphene materials; the locking mechanism fixes the position of the unblocking rod to prevent accidental movement, reducing fluid resistance and wear; the overall structure simplifies the sampling process, reduces equipment wear and maintenance costs, and overcomes the defects of long-term retention of the unblocking rod and piston slippage leakage. 2. The threaded connection allows for fine-tuning of the sliding tube, ensuring that the sampling piston can accurately seal the sampling hole, improving sealing and sampling accuracy; the fixing plate enhances the rigidity of the sampling tube end, preventing the sliding tube from shaking and reducing the risk of accidental piston slippage; it achieves coordinated positioning of the unblocking rod and the sampling piston, further preventing leakage and improving the overall durability of the device. 3. The cleaning port ensures the hygiene and reliability of the device for long-term use and solves the problem of inconvenient maintenance. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the sampling tube in an embodiment of this application; Figure 2 This is a diagram illustrating the sealing mechanism in an embodiment of this application; Figure 3 This is a cross-sectional view of the sliding tube in an embodiment of this application; Figure 4 yes Figure 3A magnified view of a portion of region A in the middle; Figure 5 This is an exploded view of the locking nut and sliding tube in the embodiment of this application.

[0024] Reference numerals: 100, sampling tube; 110, sampling hole; 200, sampling piston; 300, sliding tube; 400, discharge tube; 500, unblocking rod; 600, locking mechanism; 610, locking ring; 611, clearance groove; 620, locking block; 621, snap-fit ​​groove; 630, stop block; 640, limiting ring; 700, fixing plate; 800, sealing mechanism; 810, connecting seat; 820, expansion ring; 830, flexible seal; 840, drive assembly; 841, drive rod; 842, drive block; 843, drive groove; 844, locking nut. Detailed Implementation

[0025] The following will be combined with the appendix in the embodiments of this application. Figure 1 To be continued Figure 5 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] Reference Figures 1 to 5 This application provides a graphene material detection and sampling device. Its core design is that the cooperation between the independently operable unblocking rod 500 and the locking mechanism 600 solves the problem of the unblocking rod 500 being stuck in the pipe for a long time; by adding a sealing mechanism 800, leakage caused by accidental piston slippage is effectively prevented; and the modular design improves the convenience of maintenance.

[0027] In general, the sampling device mainly includes a sampling tube 100, a sampling piston 200, a sliding tube 300, a discharge pipe 400, a clearing rod 500, and a locking mechanism 600. The sampling tube 100 is fixed to the sampling hole 110 on the side wall of the production tank via a flange, achieving communication with the inside of the tank. The sampling piston 200 is slidably disposed within the sampling tube 100 and can move to the sampling hole 110 under the action of the sliding tube 300 to achieve sealing. The sliding tube 300 passes through and connects to the sampling piston 200, and the discharge pipe 400 is installed at its end near the tank. The clearing rod 500 is slidably disposed inside the sliding tube 300, and its position is fixed and released by the locking mechanism 600. When sampling is required, pull the sliding tube 300 backward, and the sampling piston 200 will retract from the sampling hole 110, allowing the material to enter the sampling tube 100. Then, push the sliding tube 300 forward, and the sampling piston 200 will push the material out of the discharge pipe 400. When there is a risk of blockage in the sampling hole 110, the locking mechanism 600 can be operated to release the unblocking rod 500, allowing it to extend and unblock the pipe. After unblocking, the unblocking rod 500 can be retracted and locked by the locking mechanism 600 to prevent long-term stagnation.

[0028] The end of the sampling tube 100 is sealed to the production tank via a flange. At the other end of the sampling tube 100 away from the tank, a fixing plate 700 is fixedly installed. The sliding tube 300 passes through the fixing plate 700 and is threadedly connected to it. This threaded connection allows the operator to fine-tune the initial axial position of the entire internal assembly, including the sampling piston 200 and the unblocking rod 500, relative to the sampling tube 100 by rotating the sliding tube 300. This ensures that the sampling piston 200 can be accurately moved to the sampling hole 110 for effective sealing, improving the reliability of the seal and preventing leakage due to misalignment.

[0029] Furthermore, the locking mechanism 600 is a key component for controlling the movement of the drain rod 500. The locking mechanism 600 mainly includes a locking ring 610 fixed to the end of the sliding tube 300, a pair of stop blocks 630 symmetrically arranged on the body of the drain rod 500, and a locking block 620 arranged on the locking ring 610. The locking ring 610 has a clearance groove 611 for the stop block 630 to pass through. When the drain rod 500 needs to be extended, the drain rod 500 is pushed, and the stop block 630 on it passes through the clearance groove 611 and enters the interior of the sliding tube 300. If the drain rod 500 is rotated or pushed further, the stop block 630 can slide out of the clearance groove 611 and form a locking groove 621 on the side wall of the locking block 620, thereby locking the drain rod 500 in the extended position. This design provides a stable and reliable mechanical locking mechanism, effectively preventing the unblocking rod 500 from accidentally shifting during production due to vibration or material scouring. This ensures the unblocking effect while avoiding unnecessary interference with normal material flow.

[0030] To optimize the automatic reset function of the unblocking rod 500, a limiting ring 640 is also provided on the unblocking rod 500. This limiting ring 640 can slide within the sliding tube 300. A return spring is installed between the sliding tube 300 and the unblocking rod 500. One end of the spring acts on the internal structure of the sliding tube 300, and the other end acts on the limiting ring 640, always providing an elastic force to the unblocking rod 500 to tend towards the retracted state. When the locking mechanism 600 is unlocked, under the action of the return spring, the unblocking rod 500 can automatically retract into the sliding tube 300. The movement of the limiting ring 640 is ultimately blocked by the locking ring 610, thus limiting the retraction stroke of the unblocking rod 500. This mechanism ensures that the unblocking rod 500 can be immediately removed from the flow area after unblocking operations, fundamentally solving the problems of increased resistance, accelerated wear, and production interference caused by its long-term retention in the pipe.

[0031] To further enhance sealing performance and prevent accidental leakage due to pressure fluctuations within the tank or piston wear, a sealing mechanism 800 is integrated into the sliding tube 300. This mechanism includes a connecting seat 810 connecting the sliding tube 300 and the sampling piston 200, multiple expansion rings 820 radially slidable around the connecting seat 810, a flexible seal 830 surrounding the sampling piston 200 and the connecting seat 810, and a drive assembly 840 for driving the expansion rings 820. When the drive assembly 840 is activated, it pushes the multiple expansion rings 820 radially outward along the connecting seat 810, thereby opening the flexible seal 830 from the inside and pressing it tightly against the inner wall of the sampling tube 100, forming a strong additional seal. This dynamic sealing capability significantly improves sealing reliability under harsh operating conditions.

[0032] Specifically, the drive assembly 840 includes a drive rod 841 that can slide along the length of the sliding tube 300, and multiple drive blocks 842 that are radially movable on the connecting seat 810. The sidewalls of the drive blocks 842 have inclined drive grooves 843. When the drive rod 841 is pressed towards the tank, the end of the drive rod 841 embeds into the drive groove 843 of the drive block 842. Utilizing the principle of the inclined plane, the axial movement of the drive rod 841 is converted into the radial movement of the drive block 842, thereby pushing the expansion ring 820 outward to press the flexible seal 830. This structure combining lever and inclined plane achieves significant sealing and pressing force with relatively small operating force.

[0033] To maintain the sealing state generated by the drive assembly 840, a locking nut 844 is also provided in the drive assembly 840. The locking nut 844 is threaded onto the outer wall of the sliding tube 300, and its end can abut against the tail of the drive rod 841. When the drive rod 841 is pressed to the desired position, tightening the locking nut 844 can use friction and abutment force to firmly lock the drive rod 841 in the current state, thereby maintaining the expansion sealing effect of the sealing mechanism 800, preventing it from accidentally loosening due to system vibration or pressure changes, and ensuring the durability and stability of the seal.

[0034] In addition, to facilitate cleaning and maintenance of the sampling tube 100, a cleaning port is provided on the side wall of the sampling tube 100, behind the initial position of the sampling piston 200. This cleaning port is equipped with a removable sealing cap. When sampling is completed or periodic maintenance is required, the sealing cap can be opened, and water or cleaning tools can be connected through the cleaning port to thoroughly rinse and clean the inside of the sampling tube 100. This effectively prevents material residue and cross-contamination, greatly simplifies the cleaning process, and reduces maintenance costs.

[0035] In summary, the graphene material detection and sampling device provided in this embodiment, in actual use, is first installed on the production tank by the operator via the flange; during normal sampling, the material can be collected and discharged by pulling and pushing the sliding tube 300; if there are signs of blockage, the locking mechanism 600 is operated to release and extend the unblocking rod 500 to unblock the blockage, and after completion, the unblocking rod 500 automatically retracts under the action of the return spring; when it is necessary to enhance the seal or cope with high pressure conditions, the sealing mechanism 800 can be activated and locked by the drive component 840 and the locking nut 844; during regular maintenance, cleaning is performed through the cleaning port.

[0036] In this embodiment, the retractable design, combined with a locking and reset mechanism, allows the unblocking rod 500 to intervene only briefly when needed, avoiding long-term stagnation that could disrupt the production process and cause wear. The combination of the fine-tuning thread, the dynamic sealing mechanism 800, and the mechanical locking effectively prevents accidental piston slippage and material leakage caused by pressure fluctuations, ensuring production safety and sampling accuracy. The modular design and dedicated cleaning port make cleaning, component replacement, and other maintenance tasks simple and quick, reducing long-term operating costs. By integrating sampling, unblocking, sealing, and cleaning functions into one compact structure with clear operating logic, this design meets the stringent requirements for efficient and reliable sampling in the industrial production of graphene.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A graphene material detection and sampling device, characterized in that: include: The sampling tube (100) is connected to the side wall of the production tank via a flange and communicates with the inside of the production tank via a sampling hole (110); The sampling piston (200) is slidably connected inside the sampling tube (100) and can slide to the sampling hole (110) to block the sampling hole (110). A sliding tube (300) is connected to the sampling piston (200), passes through the sampling piston (200), and is slidably connected to the sampling tube (100); A discharge pipe (400) is installed on the side of the sliding pipe (300) near the production tank. The unblocking rod (500) is slidably disposed inside the sliding tube (300) and is slidably and sealingly connected to the inner wall of the sliding tube (300); A locking mechanism (600) is disposed on the sliding tube (300) and connected to the unblocking rod (500).

2. The graphene material detection and sampling device according to claim 1, characterized in that: The locking mechanism (600) includes a locking ring (610), a stop block (630), and a locking block (620). Two stop blocks (630) are provided and symmetrically arranged on the unblocking rod (500). The stop blocks (630) slide inside the sliding tube (300). The locking ring (610) is located at the end of the sliding tube (300). A clearance groove (611) is provided on the locking ring (610). The stop block (630) slides through the clearance groove (611) into the sliding tube (300). The locking block (620) is located on the locking ring (610). A snap-fit ​​groove (621) is provided on the side wall of the locking block (620). The stop block (630) slides out of the clearance groove (611) and can snap-fit ​​with the snap-fit ​​groove (621).

3. The graphene material detection and sampling device according to claim 2, characterized in that: The sampling tube (100) is provided with a fixing plate (700) at its end, and the sliding tube (300) is threadedly connected to the fixing plate (700).

4. The graphene material detection and sampling device according to claim 2, characterized in that: A limiting ring (640) is provided on the unblocking rod (500). The limiting ring (640) slides inside the sliding tube (300) and can abut against the side of the locking ring (610) near the production tank. A return spring is provided between the sliding tube (300) and the unblocking rod (500). The return spring is connected to the limiting ring (640) and pushes the limiting ring (640) closer to the locking ring (610).

5. The graphene material detection and sampling device according to claim 4, characterized in that: A sealing mechanism (800) is provided on the sliding tube (300). The sealing mechanism (800) includes a connecting seat (810), an expansion ring (820), a flexible seal (830), and a drive assembly (840). The connecting seat (810) connects the sliding tube (300) and the sampling piston (200). The flexible seal (830) is disposed on the sampling piston (200) and extends to the periphery of the connecting seat (810). Multiple expansion rings (820) are disposed and slide on the connecting seat (810). The expansion rings (820) are connected to the flexible seal (830). The drive assembly (840) is disposed on the sliding tube (300) and the expansion ring (820) to drive the expansion ring (820) to slide.

6. The graphene material detection and sampling device according to claim 5, characterized in that: The drive assembly (840) includes a drive rod (841) and a drive block (842). The drive rod (841) slides along the length of the sliding tube (300) on the side wall of the sliding tube (300). The drive block (842) slides along the radial direction of the connecting seat (810). The drive rod (841) abuts against the side wall of the drive block (842). A drive groove (843) is provided on the side wall of the drive block (842). When the drive rod (841) is pressed close to the connecting seat (810), the drive rod (841) drives the drive block (842) through the drive groove (843) to drive the expansion ring (820) close to the inner wall of the sampling tube (100).

7. The graphene material detection and sampling device according to claim 6, characterized in that: The drive assembly (840) also includes a locking nut (844) which is threaded onto the sliding tube (300) and abuts against the drive rod (841).

8. The graphene material detection and sampling device according to any one of claims 1-7, characterized in that: The sampling tube (100) has a cleaning port on its side wall. The cleaning port is located behind the initial position of the sampling piston (200) and is equipped with a removable sealing cap.

Images