A deep sampling device for coal mine geological survey

Abstract

This invention discloses a deep sampling device for coal mine geological exploration, belonging to the field of geological exploration technology. It includes a base and a column, with a lifting platform slidably connected to the column. A sampling rod is detachably connected to the lower end of a drill rod, and a hollow drill bit is detachably connected to the lower end of the sampling rod. A sample storage tube is detachably connected inside the sampling rod. A sealing element is slidably connected to the lower part of the sample storage tube within the hollow drill bit. A sealing and locking mechanism is provided at the upper part of the sample storage tube. Water is placed inside the sample storage tube between the sealing and locking mechanism and the sealing element. A squeezing and unlocking mechanism is provided between the water and the drill rod. A triggering mechanism is connected to a lifting and driving mechanism, and a fixing mechanism is provided on the lifting platform. This invention achieves the purpose of sampling at a specified depth. Simultaneously, during non-sampling stages, the sealing element seals the lower end of the hollow drill bit, effectively preventing the premature intrusion of non-target layer soil and rock samples, avoiding cross-mixing and dilution contamination of samples from different depths, and improving the fidelity of in-situ samples and the reliability of subsequent analytical data.

Description

Technical Field

[0001] This invention relates to the field of geological exploration technology, and in particular to a deep sampling device for coal mine geological exploration. Background Technology

[0002] Coal mine geological exploration is a crucial foundation for safe coal mine production and the rational development of resources. During coal mine geological exploration, it is necessary to obtain coal and rock strata samples through drilling. These samples are then used to analyze and test the coal seam occurrence, gas content, and physical and mechanical properties of the rock strata, providing reliable geological data for mine design, mining deployment, and gas hazard control. Among these, the drilling and sampling equipment is the core equipment for achieving the above exploration objectives; its sampling accuracy, sample fidelity, and operational efficiency directly affect the accuracy and reliability of the exploration results.

[0003] Currently, drilling sampling devices used in coal mine geological exploration typically employ bottom-opening sampling drill bits, where soil or coal samples are directly squeezed into the sampling tube during drilling. However, a significant drawback of this type of device is that the sampling port remains open throughout the entire drilling process from the surface to the target depth. This allows soil and rock samples from non-target strata to enter the sampling chamber prematurely, causing mixing and contamination of samples from different depths within the chamber. Furthermore, drilling fluid (water or mud) may intrude into the sampling chamber during sampling, further diluting or contaminating the in-situ samples, severely affecting sample representativeness and the accuracy of subsequent analytical test results. Moreover, sampling requires frequent drilling stops, retractions, or drill bit changes to complete the sampling process, resulting in cumbersome procedures, low operational efficiency, and an increased risk of borehole instability due to repeated drilling. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art where, during the drilling and sampling process of a bottom-opening sampling drill bit, soil and rock samples from non-target layers enter the sampling chamber in advance, causing mixing and contamination of samples from different depths within the sampling chamber, as well as a cumbersome sampling process. Therefore, this invention proposes a deep sampling device for coal mine geological exploration.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A deep sampling device for coal mine geological exploration includes a base and a column. A lifting platform is slidably connected to the column, and a lifting drive mechanism for driving the lifting platform to move up and down is provided on the column. A water braid is rotatably connected to the lower part of the lifting platform. A drill rod is detachably connected to the lower end of the mandrel in the water braid. A sampling rod is detachably connected to the lower end of the drill rod. A hollow drill bit is detachably connected to the lower end of the sampling rod. The sampling drive mechanism for driving the mandrel in the water braid to rotate is provided on the lifting platform. A sample storage tube is detachably connected inside the sampling rod. A sealing component is slidably connected to the lower part inside the hollow drill bit. A sealing and locking mechanism is provided at the upper part of the sample storage tube. Water is provided inside the sample storage tube between the sealing and locking mechanism and the sealing component. A squeezing unlocking mechanism for unlocking the sealing and locking mechanism is provided inside the water braid and the drill rod. A triggering mechanism for triggering the squeezing unlocking mechanism is slidably connected to the lifting platform. The triggering mechanism is connected to the lifting drive mechanism. A fixing mechanism for fixing the triggering mechanism is provided on the lifting platform. A squeezing component for releasing the fixing mechanism is detachably connected to the outside of the column.

[0006] In some embodiments, the plugging component includes a plug and a sealing piston, the sealing piston being slidably connected inside the sample storage tube, the upper end of the plug being fixedly connected to the sealing piston, and the lower end being tapered and extending downwards into a hollow drill bit.

[0007] In some embodiments, the sealing and locking mechanism includes an end cap fixed to the upper end of the sample storage tube and a connecting tube fixed through the end cap. The upper end of the connecting tube is open and the lower end is closed. A through hole is opened on the outer circular surface of the connecting tube below the end cap, and a sealing block is provided inside the connecting tube at the through hole. A support spring is connected between the lower surface of the sealing block and the connecting tube, and a first compression rod is fixedly connected to the upper surface of the sealing block.

[0008] In some embodiments, the squeeze unlocking mechanism includes a second squeeze rod disposed within the water braid. The second squeeze rod slides through the spindle in the water braid. A sliding sealing ring sleeved on the outside of the second squeeze rod is fixedly connected inside the spindle in the water braid. The upper end of the second squeeze rod extends upward out of the lifting platform, and a first return spring is connected between the second squeeze rod and the lifting platform.

[0009] In some embodiments, the compression unlocking mechanism further includes a compression assembly, which includes a third compression rod slidably connected inside the drill rod. The upper end of the third compression rod abuts against the lower end of the second compression rod, and the lower end of the third compression rod abuts against the upper end of the first compression rod. A support ring is fixedly connected to the outside of the third compression rod, and the support ring is slidably connected inside the drill rod. A second return spring is connected between the support ring and the drill rod.

[0010] In some embodiments, the triggering mechanism includes a sliding rod and a pressure plate. The sliding rod is slidably connected to the lifting platform in a vertical direction, and the pressure plate is fixedly connected to the upper part of the sliding rod and located above the second pressing rod.

[0011] In some embodiments, the lifting drive mechanism includes a drive sprocket rotatably connected to the lower part of the column and a driven sprocket rotatably connected to the upper part of the column. The drive sprocket and the driven sprocket are externally connected to a chain. One end of the chain is connected to the upper end of the sliding rod, and the other end of the chain is connected to the lower end of the sliding rod. A first hydraulic motor is fixedly connected to the lower part of the column, and the output end of the first hydraulic motor is connected to the drive sprocket.

[0012] In some embodiments, the fixing mechanism includes a sliding member slidably connected within the lifting platform. The outer end of the sliding member is in the shape of an isosceles trapezoid or an isosceles triangle, and a plug is fixedly connected to the sliding member. A connecting hole adapted to the plug is opened on the sliding rod, and the plug is inserted through the connecting hole. A third return spring is connected between the sliding member and the lifting platform. A vertical partition is fixedly connected inside the lifting platform, and a plug hole adapted to the plug is opened on the vertical partition, with the outer end of the plug inserted into the plug hole.

[0013] In some embodiments, the lifting platform is provided with a self-lubricating mechanism for automatically applying lubricating grease to the insert blocks.

[0014] In some embodiments, the self-lubricating mechanism includes an oil reservoir and an air bladder located on one side of the sliding member. A connecting pipe connects the oil reservoir and the air bladder. The air bladder is provided with an air inlet and a first one-way valve. A second one-way valve is provided on the connecting pipe. The lower part of the oil reservoir is provided with an oil outlet above the insert block, and the upper part of the oil reservoir is provided with a filling port with a threaded sealing cap.

[0015] Compared with the prior art, the present invention provides a deep sampling device for coal mine geological exploration, which has the following beneficial effects: 1. By combining the sample storage tube, the plugging component and the sealing locking mechanism, the purpose of sampling at the specified depth is achieved. At the same time, during the non-sampling stage, the plugging component seals the lower end of the hollow drill bit, effectively preventing soil and rock samples from non-target layers from intruding in advance, avoiding cross-mixing and dilution of samples from different depths, and significantly improving the fidelity of in-situ samples and the reliability of subsequent analysis data. 2. By coordinating the extrusion components, fixing mechanism, triggering mechanism, and extrusion unlocking mechanism, when sampling is required, the relative sliding between the triggering mechanism and the lifting platform directly pushes the extrusion unlocking mechanism to release the seal of the sealing locking mechanism. Then, as drilling continues, samples can be collected automatically, without additional operation. The triggering is intuitive and reliable, with no complex hydraulic or electrical components, making it more suitable for deep sampling conditions. It also has low manufacturing and maintenance costs and a low failure rate. At the same time, it greatly simplifies the sampling operation process, reduces the number of times drilling stops and retractions, and improves the efficiency and safety of coal mine geological exploration sampling operations. 3. Moreover, during the drilling process, the sliding rod will first slide upward a certain distance on the lifting platform, and then drive the lifting platform to slide synchronously. This will achieve the effect of pre-tensioning the chain, so that the chain can smoothly transition from a slack state to a tensioned state before bearing the heavy load of the drill bit. This eliminates the reverse starting impact load caused by the accumulation of chain gaps and elastic elongation. This mechanism not only avoids the violent impact noise and tooth skipping risk between the chain and sprocket at the moment of drilling, but also significantly improves the smoothness of the drilling action and the safety of the drill bit while protecting the chain pins, rollers and reducer transmission components. 4. The self-lubricating mechanism automatically applies lubricating grease to the plug, ensuring smooth repositioning during reset and providing sufficient lubrication between the plug, connecting hole, and socket. This ensures smooth plug removal and sliding, while also preventing excessive wear due to lack of lubrication, thus extending the service life of the components.

[0016] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0017] Figure 1 This is a frontal three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of a partial cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the front sectional view of the drill pipe section. Figure 4 This is a schematic cross-sectional view of the structure between the drill pipe and the sampling pipe. Figure 5 This is a schematic diagram of the frontal sectional view of the hollow drill bit. Figure 6 This is a schematic diagram of the front sectional view of the lifting platform. Figure 7This is a top-view sectional structural diagram of the lifting platform. Figure 8 This is a schematic diagram of a partial cross-sectional view of the self-lubricating mechanism. Figure 9 This is a frontal cross-sectional three-dimensional structural diagram of a unidirectional sample introduction mechanism; Figure 10 This is a schematic diagram of the three-dimensional structure of the explosion at the hollow drill bit.

[0018] In the diagram: 1. Base; 2. Column; 201. Threaded hole; 3. Lifting platform; 301. Guide wheel; 303. Vertical partition; 304. Horizontal partition; 4. Lifting drive mechanism; 401. Drive sprocket; 402. Driven sprocket; 403. Chain; 404. First hydraulic motor; 5. Sampling drive mechanism; 501. Second hydraulic motor; 502. Hollow shaft reducer; 503. Drive shaft; 6. Water braid; 601. Mandrel; 602. First connection 7. Drill rod; 701. Second connector; 702. Third connector; 8. Sampling rod; 801. Stop block; 802. Fourth connector; 9. Hollow drill bit; 901. Connecting groove; 902. Water outlet; 10. Sample storage tube; 11. Sealing component; 1101. Plug; 1102. Sealing piston; 1103. Protrusion; 12. Sealing locking mechanism; 1201. End cap; 1202. Connecting pipe; 1203. Through hole; 1204. Sealing block; 1 205. First extrusion rod; 1206. Support spring; 13. Triggering mechanism; 1301. Sliding rod; 1302. Pressure plate; 14. Second extrusion rod; 1401. First return spring; 1402. Sliding sealing ring; 15. Extrusion assembly; 1501. Third extrusion rod; 1502. Support ring; 1503. Second return spring; 16. Fixing mechanism; 1601. Sliding element; 1602. Insertion block; 1603. Insertion hole; 1604. Third 1605. Return spring; 1606. Connecting hole; 1607. Guide shaft; 18. Extrusion part; 19. Self-lubricating mechanism; 10. Oil reservoir; 11. Air bladder; 12. Connecting pipe; 13. First check valve; 14. Second check valve; 15. Oil outlet; 16. Filling port; 17. Sealing cap; 18. One-way injection mechanism; 19. Injection tube; 19. Elastic strip; 20. Flow gap; 21. Drill rod holder. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-4A deep sampling device for coal mine geological exploration includes a base 1 and a column 2 fixedly installed on the base 1. A lifting platform 3 is slidably connected to the column 2. Several guide wheels 301 are rotatably installed inside the lifting platform 3, abutting against the outer surface of the column 2. The column 2 is provided with a lifting drive mechanism 4 for driving the lifting platform 3 to rise and fall. A water braid 6 is rotatably connected to the lower part of the lifting platform 3. The water braid 6 includes a water braid shell and a spindle 601 rotatably installed inside the water braid shell. The spindle 601 and the water braid shell are rotatably sealed together. The water braid shell is also provided with a connection port. By connecting this connection port to an external water supply system, drilling water can be provided to the device during drilling (the water braid 6 is prior art, and its specific principle will not be described here).

[0021] A drill rod 7 is detachably connected to the lower end of the mandrel 601. A first connector 602 is fixedly mounted on the lower end of the mandrel 601, and a second connector 701 is fixedly mounted on the upper end of the drill rod 7. The second connector 701 is threaded onto the first connector 602. A sampling rod 8 is detachably connected to the lower end of the drill rod 7. A third connector 702 is fixedly mounted on the lower end of the drill rod 7, and a fourth connector 802 is fixedly mounted on the upper end of the sampling rod 8. The fourth connector 802 is threaded onto the third connector 702. Furthermore, during sampling, the number of drill rods 7 can be increased as needed. Several drill rods 7 are connected end-to-end via the second connector 701 and the third connector 702 at the upper and lower ends. The sampling rod 8 is mounted at the lower part of the lowest drill rod 7 via the fourth connector 802.

[0022] A hollow drill bit 9 is threaded onto the lower end of the sampling rod 8. Furthermore, the mandrel 601, the first connector 602, the drill rod 7, the second connector 701, the third connector 702, the sampling rod 8, and the fourth connector 802 are all hollow. The lifting platform 3 is equipped with a sampling drive mechanism 5 for driving the mandrel 601 to rotate.

[0023] A drill pipe holder 21 is fixedly installed on one side of the base 1 below the lifting platform 3 to assist in the installation or removal of the drill pipe 7 (the drill pipe holder 21 is existing technology, and its specific principle will not be described here).

[0024] A sample storage tube 10 is inserted inside the sampling rod 8, and several inverted L-shaped baffles 801 arranged in a circular array are fixedly installed on the upper part of the inner surface of the sampling rod 8. The upper end of the sample storage tube 10 is inserted between the baffles 801. Since the outer diameter of the sample storage tube 10 is smaller than the inner diameter of the sampling rod 8, a flow gap 20 for water supply is left between the outer circular surface of the sample storage tube 10 and the inner circular surface of the sampling rod 8, and a water outlet hole 902 communicating with the flow gap 20 is opened on the hollow drill bit 9. A sealing member 11 is slidably connected to the lower part of the sample storage tube 10 inside the hollow drill bit 9, and a sealing locking mechanism 12 is provided at the upper part of the sample storage tube 10 to seal the upper end of the sample storage tube 10. Water is provided inside the sample storage tube 10 between the sealing locking mechanism 12 and the sealing member 11.

[0025] Reference Figure 3 and Figure 6 The mandrel 601 and drill rod 7 are provided with a compression unlocking mechanism for unlocking the sealing locking mechanism 12. The lifting platform 3 is slidably connected with a triggering mechanism 13 for triggering the compression unlocking mechanism. The triggering mechanism 13 is connected to the lifting drive mechanism 4, and the lifting platform 3 is provided with a fixing mechanism 16 for fixing the triggering mechanism 13.

[0026] Reference Figure 1 The column 2 is detachably connected to an extrusion member 17 for releasing the fixing mechanism 16. The extrusion member 17 is an isosceles trapezoid. The outer surface of the column 2 has threaded holes 201. The extrusion member 17 is equipped with bolts. The extrusion member 17 is fixed to the outside of the column 2 by threading the bolts into the threaded holes 201. There are multiple threaded holes 201, which are equidistantly distributed along the height direction. By installing bolts into the threaded holes 201 at different heights, the extrusion member 17 can be fixed at different heights.

[0027] Reference Figure 3-6 as well as Figure 10 The plugging component 11 includes a plug 1101 and a sealing piston 1102. The sealing piston 1102 is slidably connected to the sample storage tube 10. The upper end of the plug 1101 is fixedly connected to the sealing piston 1102, and the lower end is conical and extends downward to form a hollow drill bit 9. Several protrusions 1103 are fixedly provided on the lower outer circular surface of the plug 1101. Several connecting grooves 901 that are adapted to the protrusions 1103 are opened on the inner circular surface of the lower opening of the hollow drill bit 9. The anti-rotation protrusions 1103 are inserted into the connecting grooves 901 to ensure that the plug 1101 can rotate with the hollow drill bit 9 during drilling and sampling, while preventing relative rotation between the plug 1101 and the hollow drill bit 9.

[0028] The sealing and locking mechanism 12 includes an end cap 1201 fixed to the upper end of the sample storage tube 10 and a connecting tube 1202 fixed through the end cap 1201. The upper end of the connecting tube 1202 is open and the lower end is closed. A through hole 1203 is opened on the outer circular surface of the connecting tube 1202 below the end cap 1201, and a sealing block 1204 is inserted into the through hole 1203 inside the connecting tube 1202 to seal the through hole 1203. A support spring 1206 is connected between the lower surface of the sealing block 1204 and the connecting tube 1202, and a first compression rod 1205 is fixedly connected to the upper surface of the sealing block 1204.

[0029] The squeeze unlocking mechanism includes a second squeeze rod 14 disposed inside the water braid 6. The second squeeze rod 14 slides through the spindle 601 in the water braid 6. A sliding sealing ring 1402 sleeved on the outside of the second squeeze rod 14 is fixedly connected inside the spindle 601 in the water braid 6. The upper end of the second squeeze rod 14 extends upward to the lifting platform 3, and a first reset spring 1401 is connected between the second squeeze rod 14 and the lifting platform 3.

[0030] The compression unlocking mechanism also includes a compression assembly 15, which includes a third compression rod 1501. The third compression rod 1501 is slidably connected inside the drill rod 7, and the upper end of the third compression rod 1501 abuts against the lower end of the second compression rod 14. The lower end of the third compression rod 1501 abuts against the upper end of the first compression rod 1205. A support ring 1502 is fixedly connected to the outside of the third compression rod 1501. The outer diameter of the support ring 1502 is the same as the inner diameter of the drill rod 7. The support ring 1502 is slidably connected inside the drill rod 7, and a second return spring 1503 is connected between the support ring 1502 and the drill rod 7.

[0031] Reference Figure 2 and Figure 6 The triggering mechanism 13 includes a sliding rod 1301 and a pressure plate 1302. The sliding rod 1301 is slidably connected to the lifting platform 3 in a vertical direction, and the pressure plate 1302 is fixedly connected to the upper part of the sliding rod 1301 and located above the second pressing rod 14.

[0032] The lifting drive mechanism 4 includes a drive sprocket 401 rotatably connected to the lower part of the column 2 and a driven sprocket 402 rotatably connected to the upper part of the column 2. The drive sprocket 401 and the driven sprocket 402 are externally connected by a chain 403. One end of the chain 403 is connected to the upper end of the sliding rod 1301, and the other end of the chain 403 is connected to the lower end of the sliding rod 1301. A first hydraulic motor 404 is fixedly connected to the lower part of the column 2, and the output end of the first hydraulic motor 404 is connected to the drive sprocket 401.

[0033] Reference Figure 6 and Figure 7The fixing mechanism 16 includes a sliding member 1601 slidably connected to the lifting platform 3. The sliding member 1601 is hollow inside and is sleeved on the outside of the sliding rod 1301. The shape of the sliding member 1601 near the column 2 is an isosceles trapezoid or an isosceles triangle. An insert block 1602 is fixedly connected to the inner surface of the sliding member 1601. A connecting hole 1605 adapted to the insert block 1602 is opened on the sliding rod 1301. The insert block 1602 is inserted through the connecting hole 1605. A third return spring 1604 is connected between the sliding member 1601 and the lifting platform 3. A vertical partition 303 and a horizontal partition 304 are fixed inside the lifting platform 3. An insertion hole 1603 adapted to the insert block 1602 is opened on the vertical partition 303. The outer end of the insert block 1602 is inserted into the insertion hole 1603. A guide shaft 1606 is fixedly installed on the horizontal partition 304, and a sliding member 1601 is slidably installed on the guide shaft 1606 to improve the sliding stability of the sliding member 1601.

[0034] Reference Figure 6 and Figure 8 The lifting platform 3 is equipped with a self-lubricating mechanism 18, which is used to automatically apply lubricating grease to the insert block 1602.

[0035] The self-lubricating mechanism 18 includes an oil reservoir 1801 and an airbag 1802 located on one side of the sliding member 1601. The oil reservoir 1801 is fixed inside the lifting platform 3, and the airbag 1802 is fixed on the horizontal partition 304. A connecting pipe 1803 connects the oil reservoir 1801 and the airbag 1802. The airbag 1802 is provided with an air inlet, and a first one-way valve 1804 is provided on the air inlet. The first one-way valve 1804 allows external air to enter the airbag 1802 only through the first one-way valve 1804, while the air inside the airbag 1802 cannot be discharged outward through the first one-way valve 1804 when the airbag 1802 is compressed. A second one-way valve 1805 is provided on the connecting pipe 1803. The second one-way valve 1805 ensures that the gas in the airbag 1802 can only enter the oil tank 1801 through the connecting pipe 1803, preventing the air in the oil tank 1801 from flowing back into the airbag 1802 when the compressed airbag 1802 rebounds. The lower part of the oil tank 1801, above the insert block 1602, is provided with an oil outlet 1806, and the upper part of the oil tank 1801 is provided with a filling port 1807, which is threaded with a sealing cap 1808.

[0036] Reference Figure 3 , Figure 5 and Figure 9The hollow drill bit 9 has a one-way sample injection mechanism 19 inserted inside. The one-way sample injection mechanism 19 includes a sample injection tube 1901 and several arc-shaped elastic strips 1902. The sample injection tube 1901 abuts against the lower end of the sample storage tube 10. The several elastic strips 1902 are fixed in a ring array on the inner surface of the sample injection tube 1901. The sample injection tube 1901 is sleeved on the outside of the plug 1101. In this state, one end of the elastic strip 1902 abuts against the outer circumference of the plug 1101, and the elastic strip 1902 is in an elastic deformation state due to the support and compression of the plug 1101. The state of the elastic strip 1902 when it does not undergo elastic deformation is as follows: Figure 9 As shown.

[0037] Reference Figure 2 and Figure 3 The sampling drive mechanism 5 includes a second hydraulic motor 501 and a hollow shaft reducer 502, which are respectively fixedly installed on the lifting platform 3. The output end of the second hydraulic motor 501 is connected to the input end of the hollow shaft reducer 502. A drive shaft 503 is fixedly installed inside the output hollow shaft of the hollow shaft reducer 502. The drive shaft 503 is connected to the spindle 601 in the water braid 6.

[0038] In this invention, during sampling, the extrusion piece 17 is first removed from the column 2, and then the second hydraulic motor 501 is started. The second hydraulic motor 501 drives the transmission shaft 503 to rotate through the hollow shaft reducer 502. The transmission shaft 503 then drives the drill rod 7, sampling rod 8, and hollow drill bit 9 to rotate through the spindle 601 in the water braid 6. At the same time, the first hydraulic motor 404 is started. At this time, the first hydraulic motor 404 drives the drive sprocket 401 to rotate slowly, which in turn drives the chain 403 to rotate slowly in a clockwise direction. During this process, the chain 403 can pull the sliding rod 1301 downward. Because the sliding rod 1301 is fixedly connected to the lifting platform 3 under the action of the insert block 1602 and the connecting hole 1605, the chain 403 can directly pull the lifting platform 3 downward slowly through the sliding rod 1301 until the hollow drill bit 9 contacts the ground, and then drilling can begin. Furthermore, during the drilling process, due to the obstruction of water in the upper part of the sealing piston 1102 inside the sample storage tube 10, the plug 1101 and the hollow drill bit 9 will not slide relative to each other. That is, the plug 1101 will not retract into the hollow drill bit 9 under sudden push. Therefore, the plug 1101 can play a certain blocking role, and at this time, soil and rock strata will not enter the hollow drill bit 9.

[0039] When a drill rod 7 is about to be fully drilled into the ground, it can be clamped and fixed by the drill rod holder 21. The second hydraulic motor 501 controls the mandrel 601 to reverse, thus loosening the threaded connection between the first connector 602 and the second connector 701. Then, the first hydraulic motor 404 controls the lifting platform 3 to rise to a certain height, thereby driving the mandrel 601 to rise synchronously. A new drill rod 7 can then be added between the mandrel 601 and the second connector 701. Controlling the mandrel 601 to rotate forward connects the first connector 602 on the mandrel 601 to the second connector 701 at the upper end of the new drill rod 7 via threads. Simultaneously, rotating the new drill rod 7 will connect its lower third connector 702 to the second connector 701 at the upper end of the drill rod 7 located underground via threads. The drilling process can then be repeated. When a second connector 701 needs to be added again, the above actions can be repeated.

[0040] Furthermore, during the drilling process, the external water supply system can send water into the mandrel 601 in the water braid 6 through the connection port on the water braid shell. Then, the water can flow into the flow gap 20 in the sample storage tube 10 along the inner cavity of the drill rod 7, and finally be discharged through the water outlet 902, thereby assisting the drilling.

[0041] When the designated sampling depth is about to be reached, the extrusion member 17 is bolted onto the threaded hole 201 at the corresponding height, ensuring that the extrusion member 17 is located below the lifting platform 3. Drilling continues downwards until the lifting platform 3 moves to the extrusion member 17. The upper inclined surface of the extrusion member 17 then presses against the sliding member 1601, pushing the sliding member 1601 and the insert block 1602 to slide horizontally towards the hollow shaft reducer 502. This pulls the insert block 1602 out of the insertion hole 1603 and the connecting hole 1605 on the sliding rod 1301, releasing the fixation between the sliding rod 1301 and the lifting platform 3. Simultaneously, the third return spring 1604 is compressed. At this point, the chain 403 continues to pull the sliding rod 1301 downwards, causing it to slide down the lifting platform 3, while the lifting platform 3 stops moving downwards. The sliding rod 1301 slides down on the lifting platform 3 and can then press the second pressing rod 14 downward through the pressure plate 1302, thereby pushing the second pressing rod 14 downward within the spindle 601 and compressing the first return spring 1401. The second pressing rod 14 then pushes the third pressing rod 1501 downward on the drill rod 7 and compresses the second return spring 1503. The third pressing rod 1501 then pushes the first pressing rod 1205 and the sealing block 1204 downward on the connecting pipe 1202 a certain distance, while compressing the support spring 1206. The downward movement of the sealing block 1204 separates it from the through hole 1203, thereby opening the through hole 1203.

[0042] Then the chain 403 continues to drive the sliding rod 1301 to move down until the lower part of the sliding rod 1301 touches the upper surface of the lifting platform 3. Then the lifting platform 3 can continue to move down, thereby driving the drill rod 7, the sampling rod 8 and the hollow drill bit 9 to continue drilling downward. During the continued drilling process, the soil or rock strata will push the plug 1101 and push it into the hollow drill bit 9. As the drilling continues, the soil or rock strata will not only slowly enter the hollow drill bit 9, but will also continuously push the plug 1101 into the sample storage tube 10. At the same time, the soil or rock strata will also slowly enter the sample storage tube 10. As the plug 1101 slides into the sample storage tube 10, it will also push the sealing piston 1102 to slide synchronously. Under the push of the sealing piston 1102, the water in the sample storage tube 10 can be pushed into the connecting pipe 1202 through the through hole 1203, and enter the flow gap 20 through the upper opening of the connecting pipe 1202, and finally be discharged through the water outlet 902.

[0043] Once drilling has reached a certain depth and sufficient samples have been obtained in the sample storage tube 10, drilling can be stopped. Then, the chain 403 is reversed, causing the sliding rod 1301 to slide upwards on the lifting platform 3 until the connecting hole 1605 aligns with the insertion block 1602. Under the rebound force of the third return spring 1604, the insertion block 1602 is pushed back into the connecting hole 1605 and the insertion hole 1603, thus re-fixing the sliding rod 1301 on the lifting platform 3. Then, as the chain 403 continues to reverse, the lifting platform 3 slides upwards, thereby lifting the drill rod 7, sampling rod 8, and hollow drill bit 9 from underground. During the upward lifting process, the elastic strip 1902 will rebound... Figure 9 The state of the sample is maintained to prevent it from leaking out of the lower opening of the hollow drill bit 9 during the drilling process.

[0044] After the sampling rod 8 is pulled out from underground, it is removed from the drill rod 7, and the hollow drill bit 9 is removed from the sampling rod 8. At this time, the sample storage tube 10 can be taken out from the lower opening of the sampling rod 8. Then, the sample temporarily stored inside the sample storage tube 10 can be discharged and collected from the lower opening by directly tapping the sample storage tube 10. Alternatively, the first squeezing rod 1205 and the sealing block 1204 can be pulled upward from the connecting tube 1202. Then, high-pressure water is slowly injected into the sample storage tube 10 through the connecting tube 1202 and the through hole 1203. The high-pressure water entering the sample storage tube 10 can push the sealing piston 1102 and the plug 1101 to move towards the lower end of the sample storage tube 10, thereby pushing out and collecting the sample in the sample storage tube 10. At the same time, the sealing piston 1102 and the plug 1101 are reset, and then the sealing block 1204 and the first squeezing rod 1205 are inserted back into the connecting tube 1202.

[0045] Ultimately, this device enables drilling and sampling at a specified depth, while preventing samples from the upper layers from being collected prematurely, effectively preventing samples from different depths from mixing and contaminating each other.

[0046] Furthermore, during the process of the pressing member 17 pushing the sliding member 1601 towards the hollow shaft reducer 502, the sliding member 1601 also compresses the air bag 1802. At this time, the air bag 1802 can fill a certain amount of air into the oil reservoir 1801 through the connecting pipe 1803, increasing its internal air pressure. At this time, a portion of the lubricating grease inside the oil reservoir 1801 can be discharged through the oil outlet 1806 and directly applied to the insert block 1602, achieving the purpose of automatically applying lubricating grease to it. This ensures that it can be smoothly inserted back into the connecting hole 1605 and the insertion hole 1603 during reset, thereby ensuring sufficient lubrication between the insert block 1602 and the connecting hole 1605 and the insertion hole 1603, guaranteeing the smoothness of the insertion block 1602's pull-out and sliding. It also prevents excessive wear between the insert block 1602 and the connecting hole 1605 and the insertion hole 1603 due to lack of lubrication, ensuring the service life of the corresponding components. After the insert 1602 is inserted back into the connection hole 1605 and the insertion hole 1603, the airbag 1802 rebounds and draws new air into its interior through the first one-way valve 1804 to facilitate the next inflation and lubrication.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A deep sampling device for coal mine geological exploration, comprising a base (1) and a column (2), characterized in that: A lifting platform (3) is slidably connected to the column (2), and a lifting drive mechanism (4) for driving the lifting platform (3) to rise and fall is provided on the column (2). A water braid (6) is rotatably connected to the lower part of the lifting platform (3). A drill rod (7) is detachably connected to the lower end of the water braid (6). A sampling rod (8) is detachably connected to the lower end of the drill rod (7). A hollow drill bit (9) is detachably connected to the lower end of the sampling rod (8). A sampling drive mechanism (5) for driving the mandrel (601) in the water braid (6) to rotate is provided on the lifting platform (3). The sampling rod (8) is detachably connected to a sample storage tube (10). The lower part of the sample storage tube (10) is slidably connected to a sealing component (11) inside the hollow drill bit (9). The upper part of the sample storage tube (10) is provided with a sealing locking mechanism (12). Water is provided inside the sample storage tube (10) between the sealing locking mechanism (12) and the sealing component (11). The water braid (6) and the drill rod (7) are provided with a squeezing unlocking mechanism for unlocking the sealing locking mechanism (12). The lifting platform (3) is slidably connected with a triggering mechanism (13) for triggering the squeezing unlocking mechanism. The triggering mechanism (13) is connected to the lifting drive mechanism (4). The lifting platform (3) is provided with a fixing mechanism (16) for fixing the triggering mechanism (13). The column (2) is detachably connected to a squeezing member (17) for releasing the fixing mechanism (16).

2. The deep sampling device for coal mine geological exploration according to claim 1, characterized in that: The sealing component (11) includes a plug (1101) and a sealing piston (1102). The sealing piston (1102) is slidably connected inside the sample storage tube (10). The upper end of the plug (1101) is fixedly connected to the sealing piston (1102), and the lower end is conical and extends downward to form a hollow drill bit (9).

3. The deep sampling device for coal mine geological exploration according to claim 1, characterized in that: The sealing and locking mechanism (12) includes an end cap (1201) fixed to the upper end of the sample storage tube (10) and a connecting tube (1202) fixed through the end cap (1201). The upper end of the connecting tube (1202) is open and the lower end is closed. The outer circular surface of the connecting tube (1202) is provided with a through hole (1203) below the end cap (1201). A sealing block (1204) is provided inside the connecting tube (1202) at the through hole (1203). A support spring (1206) is connected between the lower surface of the sealing block (1204) and the connecting tube (1202). A first extrusion rod (1205) is fixedly connected to the upper surface of the sealing block (1204).

4. The deep sampling device for coal mine geological exploration according to claim 3, characterized in that: The squeeze unlocking mechanism includes a second squeeze rod (14) disposed in the water braid (6). The second squeeze rod (14) slides through the spindle (601) in the water braid (6). A sliding sealing ring (1402) sleeved on the outside of the second squeeze rod (14) is fixedly connected in the spindle (601) in the water braid (6). The upper end of the second squeeze rod (14) extends upward out of the lifting platform (3), and a first reset spring (1401) is connected between the second squeeze rod (14) and the lifting platform (3).

5. The deep sampling device for coal mine geological exploration according to claim 4, characterized in that: The compression unlocking mechanism further includes a compression assembly (15), which includes a third compression rod (1501). The third compression rod (1501) is slidably connected to the drill rod (7), and the upper end of the third compression rod (1501) abuts against the lower end of the second compression rod (14). The lower end of the third compression rod (1501) abuts against the upper end of the first compression rod (1205). A support ring (1502) is fixedly connected to the outside of the third compression rod (1501). The support ring (1502) is slidably connected to the drill rod (7), and a second reset spring (1503) is connected between the support ring (1502) and the drill rod (7).

6. The deep sampling device for coal mine geological exploration according to claim 3, characterized in that: The triggering mechanism (13) includes a sliding rod (1301) and a pressure plate (1302). The sliding rod (1301) is slidably connected to the lifting platform (3) in a vertical direction. The pressure plate (1302) is fixedly connected to the upper part of the sliding rod (1301) and located above the second pressing rod (14).

7. The deep sampling device for coal mine geological exploration according to claim 6, characterized in that: The lifting drive mechanism (4) includes a drive sprocket (401) rotatably connected to the lower part of the column (2) and a driven sprocket (402) rotatably connected to the upper part of the column (2). The drive sprocket (401) and the driven sprocket (402) are externally connected to a chain (403). One end of the chain (403) is connected to the upper end of the sliding rod (1301), and the other end of the chain (403) is connected to the lower end of the sliding rod (1301). A first hydraulic motor (404) is fixedly connected to the lower part of the column (2), and the output end of the first hydraulic motor (404) is connected to the drive sprocket (401).

8. The deep sampling device for coal mine geological exploration according to claim 7, characterized in that: The fixing mechanism (16) includes a sliding member (1601) slidably connected to the lifting platform (3). The outer end of the sliding member (1601) is an isosceles trapezoid or an isosceles triangle. A plug (1602) is fixedly connected to the sliding member (1601). A connecting hole (1605) adapted to the plug (1602) is opened on the sliding rod (1301). The plug (1602) is inserted through the connecting hole (1605). A third return spring (1604) is connected between the sliding member (1601) and the lifting platform (3). A vertical partition (303) is fixedly connected inside the lifting platform (3). A plug hole (1603) adapted to the plug (1602) is opened on the vertical partition (303). The outer end of the plug (1602) is inserted into the plug hole (1603).

9. The deep sampling device for coal mine geological exploration according to claim 8, characterized in that: The lifting platform (3) is equipped with a self-lubricating mechanism (18) for automatically applying lubricating grease to the insert block (1602).

10. The deep sampling device for coal mine geological exploration according to claim 9, characterized in that: The self-lubricating mechanism (18) includes an oil reservoir (1801) and an air bladder (1802) located on one side of the sliding member (1601). A connecting pipe (1803) connects the oil reservoir (1801) and the air bladder (1802). An air inlet is provided on the air bladder (1802), and a first one-way valve (1804) is provided on the air inlet. A second one-way valve (1805) is provided on the connecting pipe (1803). An oil outlet (1806) is provided at the lower part of the oil reservoir (1801) above the insert block (1602), and a filling port (1807) is provided at the upper part of the oil reservoir (1801). A sealing cap (1808) is threaded onto the filling port (1807).

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