New type of underground coal seam sealed coring device

Abstract

This invention belongs to the field of coal mine coring technology, specifically relating to a novel sealed underground coal seam coring device. It includes a ribbed drill rod assembly, a tail bearing assembly, a motor cylinder assembly, and a sampling cylinder assembly. The ribbed drill rod assembly consists of ribbed drill rods, a tail drill rod joint, and a head drill rod joint. The tail bearing assembly is installed inside the tail drill rod joint to protect the internal structure from relative rotation during drilling, thus ensuring the stability of the sampling cylinder. The motor cylinder assembly is installed inside the ribbed drill rod to provide power for the movement of the central shaft in the sampling cylinder assembly. This invention achieves long-distance remote monitoring of underground coalbed methane through a sensor built into the sampling cylinder and a transmission line attached to the outside of the drill rod, reducing the possibility of gas leakage from the coal sample. The multi-layer sealing and the bearing assembly's holding effect on the sampling body ensure that the gas pressure inside the sampling cylinder remains constant, making the sampling results more accurate.

Description

Technical Field

[0001] This invention belongs to the field of coal mine core sampling technology, specifically relating to a novel underground coal seam closed core sampling device. Background Technology

[0002] my country's green coal resources are limited, and implementing precise and intelligent coal mining is the inevitable path for future green mining. A robust geological support technology system is a crucial foundation for this. Coal mine gas disaster prevention and control is a key focus and challenge for mine safety, with the core issue being the accurate measurement of coal seam gas content and pressure. Currently, sampling of gas-bearing coal seams or mines generally employs open or ball-valve closed coring techniques. These methods are inefficient, prone to gas loss, and have poor measurement timeliness, making it difficult to guarantee the accuracy and validity of gas content and pressure data. Consequently, they cannot effectively assess coal seam risk characteristics to guide engineering practice.

[0003] my country is both a major coal producer and consumer, and coal is a crucial basic energy source and raw material for the country. Coal seam gas content and pressure are key indicators for predicting the risk of coal seam outbursts and verifying their regional effects. Coal seam gas content is typically determined using methods such as surface coalbed methane content measurement, geological exploration gas content measurement, and underground coal seam core sampling. However, due to differences in testing conditions and methods, the results often vary significantly, lack accuracy, and generally suffer from estimation losses, thus limiting their guiding significance for coal mining.

[0004] For coal seam coring, patent specification CN204646157U discloses a coalbed methane rope coring device. This device uses a rope to lift / lower the coring device and requires compressed air to drive its operation. Patent specification CN107905752A discloses a coring device that also uses a rope to lift / lower the coring device, but relies on water pressure to drive its operation. To further achieve pressure-maintaining coring of coal seams, patent specification CN201811862U discloses a coal sampler that relies on a viscous liquid and vacuum device for pressure-maintaining coring. All of these devices contain fluid media, which can cause some contamination to the coal seam core and affect the determination of parameters such as moisture content. The patent specification with publication number CN104453759B discloses a closed coring device for testing the content of coalbed methane and rock formation gas in surface drilling. The device relies on the self-propelled action of the sample to open and start the core cutting sealing ball valve. The structure is relatively complex, and different accessories need to be replaced for different coal seams to achieve cutting. The operation is not easy and the work efficiency is low.

[0005] Therefore, it is necessary to provide a new type of closed-loop coring device for underground coal seams. Summary of the Invention

[0006] The purpose of this invention is to overcome the aforementioned problems in traditional technologies and provide a novel closed-loop core sampling device for underground coal seams.

[0007] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0008] This invention provides a novel underground coal seam sealed coring device, comprising:

[0009] The ribbed drill rod assembly consists of a ribbed drill rod, a tail drill rod connector, and a head drill rod connector; both ends of the ribbed drill rod are provided with drill bit mounting seats to facilitate the installation of drill rod connectors.

[0010] Tail bearing assembly, which is installed inside the tail drill pipe joint, is used to protect the internal structure from relative rotation when the rib drill pipe is drilled, thereby ensuring the stability of the sampling tube.

[0011] A motor cylinder assembly, which is installed inside the ribbed drill rod, is used to provide power for the movement of the central shaft in the sampling cylinder assembly;

[0012] A sampling cylinder assembly is installed inside the ribbed drill rod. The sampling cylinder assembly includes a central shaft, a tail cover plate, a tail sealing ring, a tail rotating door, a sampling cylinder, a head rotating door, a head sealing ring, a head cover plate, and a rear nut retaining ring. The sampling cylinder has a hollow bushing inside to facilitate the installation of the central shaft. The head end of the sampling cylinder has a head sampling port, and the tail end has a tail sampling port. The central shaft is equipped with a tail cover plate, a tail rotating door, a head rotating door, a head cover plate, and a rear nut retaining ring.

[0013] Furthermore, in the aforementioned novel underground coal seam sealed coring device, the tail bearing assembly includes a ventilation bearing housing, a front nut retaining ring, a bearing bracket, and a tapered roller bearing assembly. The bearing bracket is installed inside the ventilation bearing housing via a hook claw frame. The bearing bracket supports the tapered roller bearing assembly. A front nut retaining ring is installed on the outer side of the tail end of the tapered roller bearing assembly to prevent its axial displacement.

[0014] Furthermore, in the aforementioned novel underground coal seam sealed coring device, the motor barrel assembly includes a motor barrel, a battery, a DC motor, and a motor barrel cover plate. The battery and the DC motor are installed in the inner cavity of the motor barrel, and the motor barrel cover plate is installed at the opening of the inner cavity of the motor barrel. The output shaft of the DC motor passes through the motor barrel cover plate and is fixed to the end of the central shaft via a sleeve coupling.

[0015] Furthermore, in the aforementioned novel underground coal seam sealed coring device, the tail end of the motor cylinder is connected to the hook claw frame by a thread, and a hollow threading shaft extending into a tapered roller bearing assembly is provided at the center of the tail end of the motor cylinder. A support retaining ring is installed on the hollow threading shaft to prevent its axial displacement, and the inner cavity of the hollow threading shaft serves as a channel for wire and air passage.

[0016] Furthermore, in the aforementioned novel underground coal seam sealed coring device, a ventilation support pipe is threadedly connected to the outer side of the tail cover plate, and a support bearing that mates with the ventilation support pipe is installed between the inner walls of the rib drill rods. One end of the sleeve coupling is fixed to the motor barrel cover plate, and a dustproof deep groove ball bearing is installed between the other end and the hollow bushing of the sampling cylinder. The sleeve coupling is fixed to the central shaft by a pin that passes through it. The tail cover plate, motor barrel cover plate, ventilation support pipe, sleeve coupling, and dustproof deep groove ball bearing together constitute a ventilation connection assembly.

[0017] Furthermore, in the aforementioned novel underground coal seam sealed coring device, the tail cover plate is located on the outside of the tail rotating door and a tail sealing ring is installed between the two, and the head cover plate is located on the outside of the head rotating door and a head sealing ring is installed between the two.

[0018] Furthermore, in the aforementioned novel underground coal seam sealed coring device, the tail rotating door and the head rotating door need to rotate at corresponding angles in three working states. The two doors are set to the initial assembly position at 0°, and the observation angle is from the tail of the sampling cylinder to the head, with counterclockwise rotation as the positive direction of rotation.

[0019] In the initial position, the center of each slot of the tail revolving door is at 90° and 135° respectively, and the sampling port angle of the head of the sampling tube is 45° to 225°.

[0020] When sampling begins, the control center shaft 13 rotates 45°, so that the tail rotating door 18 is closed and the head rotating door is fully open;

[0021] When the sampling is finished, the control center shaft 13 rotates another 180°, which is 225° different from the initial angle, so that the rotating doors at both ends are in a sealed state.

[0022] Furthermore, in the aforementioned novel underground coal seam closed coring device, the head drill pipe joint is equipped with a coal sample cutting mechanism.

[0023] Furthermore, in the aforementioned novel underground coal seam sealed coring device, the tail rotating door and the head rotating door are made of copper-based graphite self-lubricating material.

[0024] Furthermore, in the aforementioned novel underground coal seam sealed coring device, a control chip with an integrated remote control module is installed inside the motor cylinder; a patch-type temperature sensor, humidity sensor, and pressure sensor are installed on the inner wall of the sampling cylinder; the battery, temperature sensor, humidity sensor, pressure sensor, and DC motor are all connected to the control chip, and the control chip communicates wirelessly with a remote backend through the integrated remote control module.

[0025] The beneficial effects of this invention are:

[0026] 1. This invention enables long-distance, fixed-point sampling of coal samples and allows drilling and sampling to be performed simultaneously without replacing the drill bit and drill rod, significantly shortening the sampling time. The sampling tube and drill rod have a double-layer structure. After sampling is completed, the drill rod can remain in the borehole, and the sampling tube can be pulled out separately. For the next sampling, a new sampling tube is lowered into the drill rod, thereby enabling multiple sampling and testing of coal samples at different depths. This reduces the time for coal samples to decompose into methane gas within the borehole, resulting in better sampling results.

[0027] 2. This invention achieves long-distance remote monitoring of coalbed methane underground through a sensor built into the sampling cylinder and a transmission line attached to the outside of the drill pipe, reducing the possibility of gas leakage from the coal sample. The multi-layer sealing device and bearing assembly maintain the sampling body, ensuring a constant gas pressure inside the sampling cylinder, guaranteeing the airtightness of the device, and making the sampling results more accurate. Furthermore, a single component meets multiple design requirements, is easy to assemble and disassemble, and facilitates subsequent debugging and maintenance.

[0028] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 for Figure 1 Enlarged schematic diagram of the left segment of the structure;

[0032] Figure 3 for Figure 1 Enlarged schematic diagram of the middle section of the structure;

[0033] Figure 4 for Figure 1Enlarged schematic diagram of the right segment of the structure;

[0034] Figure 5 This is a schematic diagram of the tail ventilation of the sampling cylinder in this invention;

[0035] Figure 6 This is a schematic diagram of the head ventilation of the sampling cylinder in this invention;

[0036] Figure 7 This is a schematic diagram showing the separation of the sampling cylinder tail sealing door and the central shaft in this invention;

[0037] Figure 8 This is a schematic diagram of the ventilation of the drill pipe tail bearing bracket in this invention;

[0038] Figure 9 This is a schematic diagram of the ventilation opening in the motor cylinder of the present invention;

[0039] In the attached diagram, the component numbers are as follows:

[0040] 1-Tail drill pipe joint, 2-Ventilated bearing housing, 3-Front nut retaining ring, 4-Bearing bracket, 5-Tap roller bearing assembly, 6-Hollow threading shaft, 7-Support retaining ring, 8-Motor barrel, 9-Battery, 10-DC motor, 11-Motor barrel cover plate, 12-Sleeve coupling, 13-Central shaft, 14-Support bearing, 15-Dustproof deep groove ball bearing, 16-Tail cover plate, 17-Tail seal ring, 18-Tail rotating door, 19-Sampling cylinder, 20-Head rotating door, 21-Head seal ring, 22-Head cover plate, 23-Rear nut retaining ring, 24-Drill bit mounting seat, 25-Head sampling port, 26-Tail sampling port, 27-Head drill pipe joint, 28-Rib drill pipe. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figures 1-9As shown, this embodiment provides a novel underground coal seam sealed coring device, including a ribbed drill pipe assembly, a tail bearing assembly, a motor barrel assembly, and a sampling barrel assembly. The ribbed drill pipe assembly consists of a ribbed drill pipe 28, a tail drill pipe joint 1, and a head drill pipe joint 27; both ends of the ribbed drill pipe 28 are respectively provided with drill bit mounting seats 24 for easy installation of drill pipe joints; the tail bearing assembly is installed inside the tail drill pipe joint 1, and the tail bearing assembly 1 is used to protect the internal structure from relative rotation when the ribbed drill pipe 28 is drilling, thereby ensuring the stability of the sampling barrel 19; the motor barrel assembly is installed inside the ribbed drill pipe 28 and is used to provide power for the movement of the central shaft 13 in the sampling barrel assembly.

[0043] In this embodiment, the sampling cylinder assembly is installed inside the rib drill rod 28. The sampling cylinder assembly includes a central shaft 13, a tail cover plate 16, a tail sealing ring 17, a tail rotating door 18, a sampling cylinder 19, a head rotating door 20, a head sealing ring 21, a head cover plate 22, and a rear nut retaining ring 23. The sampling cylinder 19 is provided with a hollow bushing for easy installation of the central shaft 13. The head end of the sampling cylinder 19 is provided with a head sampling port 25, and the tail end is provided with a tail sampling port 26. The central shaft 13 is equipped with the tail cover plate 16, the tail rotating door 18, the head rotating door 20, the head cover plate 22, and the rear nut retaining ring 23.

[0044] In this embodiment, the tail bearing assembly includes a ventilated bearing housing 2, a front nut retaining ring 3, a bearing bracket 4, and a tapered roller bearing assembly 5. The bearing bracket 4 is installed inside the ventilated bearing housing 2 via a hook bracket. The tapered roller bearing assembly 5 is supported by the bearing bracket 4. A front nut retaining ring 3 is installed on the outer side of the tail end of the tapered roller bearing assembly 5 to prevent its axial displacement.

[0045] In this embodiment, the motor barrel assembly includes a motor barrel 8, a battery 9, a DC motor 10, and a motor barrel cover plate 11. The battery 9 and the DC motor 10 are installed in the inner cavity of the motor barrel 8, and the motor barrel cover plate 11 is installed at the opening of the inner cavity of the motor barrel 8. The output shaft of the DC motor 10 passes through the motor barrel cover plate 11 and is fixed to the end of the central shaft 13 via a sleeve coupling 12.

[0046] In this embodiment, the tail end of the motor barrel 8 is connected to the hook claw frame by a thread. A hollow threading shaft 6 that extends into the tapered roller bearing assembly 5 is provided at the center of the tail end of the motor barrel 8. A support retaining ring 7 that prevents axial displacement is installed on the hollow threading shaft 6. The inner cavity of the hollow threading shaft 6 serves as a channel for wire passage and air passage.

[0047] In this embodiment, a ventilation support pipe is threaded to the outer side of the tail cover plate 16, and a support bearing 14 that cooperates with the ventilation support pipe is installed between the inner walls of the rib drill rod 28. One end of the sleeve coupling 12 is fixed to the motor barrel cover plate 11, and a dustproof deep groove ball bearing 15 is installed between the other end and the hollow bushing of the sampling cylinder 19. The sleeve coupling 12 is fixed to the central shaft 13 by a pin that passes through itself. The tail cover plate 16, the motor barrel cover plate 11, the ventilation support pipe, the sleeve coupling 12, and the dustproof deep groove ball bearing 15 together constitute a ventilation connection assembly.

[0048] In this embodiment, the tail cover 16 is disposed on the outside of the tail revolving door 18 and a tail sealing ring 17 is installed between the two, and the head cover 22 is disposed on the outside of the head revolving door 20 and a head sealing ring 21 is installed between the two.

[0049] In this embodiment, the tail rotating door 18 and the head rotating door 20 need to rotate at corresponding angles in three working states. The two doors are set to be at 0° in the initial assembly position. The observation angle is from the tail of the sampling tube 19 to the head, with counterclockwise rotation as the positive direction of rotation.

[0050] In the initial position, the center of the single slot of the tail revolving door 18 is at 90° and 135° respectively, and the angle of the head sampling port 25 of the sampling cylinder 19 is from 45° to 225°.

[0051] When sampling begins, the control center shaft 13 rotates 45°, so that the tail rotating door 18 is closed and the head rotating door 20 is fully open;

[0052] When the sampling is finished, the control center shaft 13 rotates another 180°, which is 225° different from the initial angle, so that the rotating doors at both ends are in a sealed state.

[0053] In this embodiment, the head drill pipe joint 27 is equipped with a coal sample cutting mechanism.

[0054] In this embodiment, the tail revolving door 18 and the head revolving door 20 are made of copper-based graphite self-lubricating material.

[0055] In this embodiment, a control chip with an integrated remote control module is installed inside the motor cylinder 8; a patch-type temperature sensor, humidity sensor, and pressure sensor are installed on the inner wall of the sampling cylinder 19; the battery 9, temperature sensor, humidity sensor, pressure sensor, and DC motor 10 are all connected to the control chip, and the control chip communicates wirelessly with the remote backend through the integrated remote control module.

[0056] The specific operation process of this invention is as follows:

[0057] When assembling the motor cylinder assembly, first install the battery 9 and related circuits inside the motor cylinder 8. The charging cable passes through the hollow tube inside the hook holder and exits the motor cylinder 8. The DC motor 10 is fixed on the ventilation support frame. Then, install the ventilation support frame, DC motor 10, and battery 9 completely inside the motor cylinder 8. Thread the hook holder onto the tail end of the motor cylinder. When assembling the sampling cylinder assembly, place the dustproof deep groove ball bearing 15 into the tail end of the sampling cylinder 19 and insert an O-ring seal. Then, insert the welded joint of the tail rotating door 18 and the central shaft 13 into the hollow bushing of the sampling cylinder 19. Then, assemble a deep groove ball bearing matching the tail end of the sampling cylinder 19 into the tail cover plate 16. At the same time, insert an O-ring seal into the groove on the side of the cover plate that contacts the rotating door. Then, thread the tail cover plate 16 of the sampling cylinder onto the sampling cylinder 19 with bolts. Tightly insert the tail rotating door 18 between the sampling cylinder 19 and the tail cover plate 16. A copper sleeve and an O-ring are inserted into the head of the sampling cylinder 19. A flat key is inserted into the exposed central shaft. The head rotating door 20 is fitted over the key. The head cover plate 22 is then bolted to the sampling cylinder 19, and the head rotating door 20 is tightly fitted between the sampling cylinder 19 and the head cover plate 22. Next, a capped nut and a washer are placed on the exposed threaded portion of the central shaft outside the head cover plate 22. A copper sleeve is installed on the outside of the sampling cylinder 19. A deep groove ball bearing is fitted over the ventilation support frame as a support and also serves to prevent rotation. The tail of the sampling cylinder 19 is then threadedly connected to the head of the ventilation support frame. Next, the drill pipe connection is threadedly connected to the drill pipe, and a bearing assembly is installed inside the connection. The joint is then placed behind the bearing assembly. The motor cylinder 8 and the sampling cylinder 19 are then inserted into the drill pipe from the head, and the drill bit is screwed onto the drill pipe head.

[0058] The sampling cylinder 19 is powered by a DC motor 10 via a built-in battery 9, which opens and closes the rotating doors on both sides to change the ventilation and sealing states. The rotating doors need to rotate at corresponding angles in three working states. Initially, both doors are at 0°, with the observation angle from the tail to the head of the sampling cylinder, and counter-clockwise rotation as the positive direction. In the initial position, the center of each slot on the tail rotating door is at 90° and 135°, respectively, while the semi-circular opening angle of the head sampling cylinder is between 45° and 225°. When sampling begins, the motor rotates 45°, closing the tail rotating door and fully opening the head rotating door. When sampling ends, the motor rotates another 180°, a difference of 225° from the initial angle, ensuring both the head and tail rotating doors are sealed. The rotating doors are sealed using a labyrinth seal rotating door made of self-lubricating graphite copper material, combined with rubber O-rings embedded in the rotating door slots. The bearing assembly, in conjunction with a copper sleeve, ensures the entire structure remains stationary while the drill pipe rotates, guaranteeing the stability of the internal structure. Long-distance remote monitoring of coalbed methane underground is achieved through sensors built into the sampling tube and transmission lines attached to the outside of the drill pipe.

[0059] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A novel underground coal seam sealed coring device, characterized in that, include: The ribbed drill rod assembly consists of a ribbed drill rod, a tail drill rod connector, and a head drill rod connector; both ends of the ribbed drill rod are provided with drill bit mounting seats to facilitate the installation of drill rod connectors. Tail bearing assembly, which is installed inside the tail drill pipe joint, is used to protect the internal structure from relative rotation when the rib drill pipe is drilled, thereby ensuring the stability of the sampling tube. A motor cylinder assembly, which is installed inside the ribbed drill rod, is used to provide power for the movement of the central shaft in the sampling cylinder assembly; A sampling cylinder assembly is installed inside the ribbed drill rod. The sampling cylinder assembly includes a central shaft, a tail cover plate, a tail sealing ring, a tail rotating door, a sampling cylinder, a head rotating door, a head sealing ring, a head cover plate, and a rear nut retaining ring. The sampling cylinder has a hollow bushing inside to facilitate the installation of the central shaft. The head end of the sampling cylinder has a head sampling port, and the tail end has a tail sampling port. The central shaft is equipped with a tail cover plate, a tail rotating door, a head rotating door, a head cover plate, and a rear nut retaining ring. The motor barrel assembly includes a motor barrel, a battery, a DC motor, and a motor barrel cover plate. The battery and the DC motor are installed in the inner cavity of the motor barrel. The motor barrel cover plate is installed at the opening of the inner cavity of the motor barrel. The output shaft of the DC motor passes through the motor barrel cover plate and is fixed to the end of the central shaft via a sleeve coupling. The tail cover is threaded with a ventilation support pipe on its outer side. A support bearing that mates with the ventilation support pipe is installed between the inner walls of the rib drill rod. One end of the sleeve coupling is fixed to the motor barrel cover, and a dustproof deep groove ball bearing is installed between the other end and the hollow bushing of the sampling cylinder. The sleeve coupling is fixed to the central shaft by a pin that passes through it. The tail cover, motor barrel cover, ventilation support pipe, sleeve coupling, and dustproof deep groove ball bearing together constitute a ventilation connection assembly.

2. The novel underground coal seam sealed coring device according to claim 1, characterized in that: The tail bearing assembly includes a ventilated bearing housing, a front nut retaining ring, a bearing bracket, and a tapered roller bearing assembly. The bearing bracket is installed inside the ventilated bearing housing via a hook bracket. The bearing bracket supports the tapered roller bearing assembly. A front nut retaining ring is installed on the outer side of the tail end of the tapered roller bearing assembly to prevent axial displacement.

3. The novel underground coal seam sealed coring device according to claim 2, characterized in that: The tail end of the motor barrel is connected to the hook frame by a thread. A hollow threading shaft is provided at the center of the tail end of the motor barrel, which extends into the tapered roller bearing assembly. A support retaining ring is installed on the hollow threading shaft to prevent its axial displacement. The inner cavity of the hollow threading shaft serves as a channel for wire passage and air passage.

4. The novel underground coal seam sealed coring device according to claim 3, characterized in that: The tail cover is located on the outside of the tail revolving door and a tail sealing ring is installed between the two. The head cover is located on the outside of the head revolving door and a head sealing ring is installed between the two.

5. The novel underground coal seam sealed coring device according to claim 4, characterized in that: The tail rotating door and the head rotating door need to rotate at corresponding angles in three working states. The two doors are set to be at 0° in the initial assembly position. The observation angle is from the tail of the sampling cylinder to the head, and the counterclockwise rotation is the positive direction of rotation. In the initial position, the center of each slot of the tail revolving door is at 90° and 135° respectively, and the sampling port angle of the head of the sampling tube is 45° to 225°. When sampling begins, the control center axis rotates 45° to close the tail rotating door and open the head rotating door. When the sampling is finished, the control center axis rotates another 180°, which is 225° different from the initial angle, so that the rotating doors at both ends are in a sealed state.

6. The novel underground coal seam sealed coring device according to claim 5, characterized in that: The head drill pipe joint is equipped with a coal sample cutting mechanism.

7. The novel underground coal seam sealed coring device according to claim 6, characterized in that: The tail revolving door and the head revolving door are made of copper-based graphite self-lubricating material.

8. The novel underground coal seam sealed coring device according to claim 7, characterized in that: The motor cylinder is equipped with a control chip with an integrated remote control module; the inner wall of the sampling cylinder is equipped with a surface-mount temperature sensor, humidity sensor, and pressure sensor; the battery, temperature sensor, humidity sensor, pressure sensor, and DC motor are all connected to the control chip, and the control chip communicates wirelessly with a remote backend through the integrated remote control module.

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