A core drilling device and a core drilling method

Abstract

This invention provides a core drilling device and method, belonging to the field of coal mining. It includes a mobile frame with a water tank fixedly installed at its bottom. A connecting hole is provided on the top of the mobile frame, located on one side of the water tank. A first drive motor is fixedly installed on the top of the mobile frame, located on one side of the connecting hole. By setting an inner ring inside one of the drill pipes, a certain space is created between the coal core or rock core obtained from the borehole and the inner wall of the drill pipe. After the core drilling device descends into the drill pipe, it can grip and pull up the coal core or rock core using clamps. During this process, the drill pipe does not need to move upwards to bring the coal core or rock core up, avoiding the drill pipe leaving the borehole and causing debris such as gravel and carbon fragments around the borehole to fall into the borehole, causing blockage and affecting the subsequent core drilling of rock and coal seams at a deeper depth.

Description

Technical Field

[0001] This invention belongs to the field of coal mining and relates to core drilling technology, specifically a core drilling device and a core drilling method. Background Technology

[0002] Core drilling is a geological exploration and engineering testing technique that involves drilling into underground rock or structures and using special drill bits to obtain underground samples (i.e., "rock cores" or "core samples") for analysis and research.

[0003] Before mining, coal mines obtain samples representing underground structures. Analyzing these samples helps to understand the structure, lithology, strength, and other characteristics of the soil and rock, providing important geological information for subsequent mining operations. At the same time, coring allows for direct observation of the coal seam's stratification, thickness, and changes in coal quality, thus helping to determine the mining location and mining method. Coring equipment is used to drill and sample coal mines.

[0004] When using existing core drilling equipment, after the drill bit extends downward to a certain depth, the equipment needs to be moved upward from the borehole to remove the rock or coal core. However, when the core drilling equipment moves upward from the borehole, some rocks or coal crushed by the drill may fall into the borehole, causing blockage and affecting the subsequent drilling and core extraction of the core along the borehole.

[0005] Therefore, we propose a core drilling device and a core drilling method to solve the problems encountered above. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention provides a drilling core sampling device and a drilling core sampling method to solve the problems mentioned in the background art.

[0007] The objective of this invention can be achieved through the following technical solution: A mobile frame is included, with a water tank fixedly installed at its bottom. A connecting hole is provided at the top of the mobile frame and on one side of the water tank. A first drive motor is fixedly installed at the top of the mobile frame and on one side of the connecting hole. One end of the output shaft of the first drive motor is fixedly connected to a first rotating shaft via a coupling. A first gear is fixedly installed at the top of the first rotating shaft. Support rods are uniformly fixedly installed around the connecting hole at the top of the mobile frame. Gear rings are slidably connected to the tops of multiple support rods. A drilling device is threadedly connected to the middle of the gear rings. The bottom end of the drilling device extends through the connecting hole to the bottom of the mobile frame. A core-taking device is rotatably installed at the top of the mobile frame and on one side of the gear ring. A locking hole is provided at the top of the mobile frame and at the bottom of the core-taking device. The bottom end of the core-taking device extends into one of the locking holes via a locking bolt. An adjustment assembly is provided at the top of the mobile frame and on the other side of the gear ring. Both ends of the adjustment assembly extend to both sides of the outer surface of the drilling device.

[0008] The drilling device includes multiple drill tubes, each with a threaded groove at the bottom center and a first threaded connecting pipe fixedly connected to the top of the drill tube. An inner ring is fixedly connected to the bottom of the inner wall of one of the drill tubes, and a drill bit is provided at the bottom of one of the drill tubes. A second threaded connecting pipe is fixedly connected to the top of the drill bit, and the top of the second threaded connecting pipe extends threadedly into the interior of the threaded groove. First limiting grooves are provided on both sides of the inner walls of the multiple drill tubes.

[0009] Preferably, the core-taking device includes a support rod, a fixed plate is fixedly connected to the top of the support rod, a second drive motor is fixedly installed on one side of the top of the fixed plate, one end of the output shaft of the second drive motor is fixedly connected to a winding roller through a coupling, a wire rope is provided on the surface of the winding roller, limit holes are opened on the top of the fixed plate and on both sides of the bottom of the winding roller, the end of the wire rope extends to the bottom of the fixed plate through the limit holes, a lower moving ring is fixedly connected to the bottom end of the wire rope, the outer surface of the lower moving ring contacts the inner wall of the drill pipe through rollers, and grippers are fixedly installed on all four sides of the bottom of the lower moving ring.

[0010] Preferably, the adjustment assembly includes a third drive motor, which is fixedly installed at the bottom of the movable frame. One end of the output shaft of the third drive motor is fixedly connected to a threaded rod via a coupling. The top end of the threaded rod passes through the movable frame and extends to the top of the movable frame. A limiting rod is fixedly installed on the top of the movable frame and on one side of the threaded rod.

[0011] Preferably, the threaded rod is threadedly connected to a first folding frame, one side of which is slidably connected to the limiting rod. A second limiting groove is provided on both sides of the top of the first folding frame. An electric telescopic rod is fixedly installed on the top of one side of the first folding frame. Limiting rings are fixedly installed at both ends of the electric telescopic rod. Connecting rods are provided inside the two limiting rings. One end of each connecting rod extends through the second limiting groove to one side of the first folding frame. A touch roller is fixedly connected to one end of each connecting rod, and a second gear is fixedly connected to the other end of each connecting rod.

[0012] Preferably, a second folding frame is fixedly installed on one side of the bottom of the first folding frame, and two ends of one side of the second folding frame are rotatably connected to a second rotating shaft. A third gear is fixedly installed on one end of each of the two second rotating shafts. The two third gears mesh with each other, and the two sides of the two third gears mesh with the two second gears respectively. A fourth drive motor is fixedly installed on one side of the second folding frame, and one end of the output shaft of the fourth drive motor is fixedly installed to one end of one of the second rotating shafts through a coupling.

[0013] Preferably, a barrier is fixedly installed on the top edge of the mobile frame, a storage box is fixedly installed on the top of the mobile frame and on one side of the toothed ring, and a storage frame is fixedly installed on the top of the storage box.

[0014] As a preferred embodiment, a core drilling device is provided, and the core drilling method of this device comprises the following specific steps:

[0015] Step 1: Drilling is performed using a core drilling device to investigate the water layer, rock strata, and coal seam conditions. When drilling the rock and coal seams, the drill pipes and drill bits are first removed from the storage box and placed on the moving frame. Then, the inner ring of the drilling device with the inner ring fixed inside is rotated and installed in the toothed ring. The drill pipe is then rotated downwards until its bottom end extends through the connecting hole on the moving frame to the bottom of the frame. From the bottom of the moving frame, the second threaded connecting pipe on the drill bit is rotated and installed into the threaded groove at the bottom of the drill pipe. The position is then adjusted using the control switch on the moving frame. During adjustment, the third drive motor drives the threaded rod to rotate. Under the constraint of the limiting rod, the first folding frame moves downwards along the threaded rod. When the first folding frame reaches its lowest position, the third drive motor pauses and locks, allowing the electric telescopic rod to retract. The two connecting rods then move towards the center along the two second limit grooves. At this point, the operator can rotate the two connecting rods to engage the two second gears with the two third gears respectively. After the two second gears and the two third gears are accurately engaged, the first drive motor and the fourth drive motor can be started. The first drive motor drives the drill pipe to rotate by the gear ring, while the fourth drive motor drives the two touch rollers to rotate in opposite directions by the third gear and the second gear, so that the drill pipe rotates downward continuously to drill into the rock strata and coal seams of the coal mine. When the top of one drill pipe is about to move to the two touch rollers, the fourth drive motor stops. At this time, the operator can take another drill pipe from the moving frame and align the threaded groove at its bottom end with the position of the first threaded connecting pipe on the drill pipe below. As the drill pipe continues to rotate, the two drill pipes can be threaded together. When the two drill pipes are stably threaded together, the positions of the first limiting grooves inside the two drill pipes are aligned, and then the fourth drive motor starts again, relying on the two touch rollers to rotate downward together, so that the drill pipe can continue to drill into the rock strata and coal seams to a deeper depth.

[0016] Step Two: During the process of drilling deeper into the rock or coal seam by adding more drill pipe, when one drill pipe has completely descended into the rock or coal seam, the first and fourth drive motors need to be paused. The operator can then remove the chuck from one of the holes at the bottom of the coring device and rotate the coring device to move the fixing plate to the top of the drilling device. Then, the second drive motor is started via the control switch on the moving frame, and the wire rope wound on the winding roller loosens. The lowering ring, being heavy, moves downwards along with the descending wire rope. When the lowering ring and grippers are about to reach the drill pipe, the operator can adjust the position of the drill pipe so that the positions of the two first limiting grooves on both sides of the inner wall of the drill pipe are aligned with the outer limit of the lowering ring. As the block positions correspond, the lowering ring moves downwards, continuing to move downwards through the gap between the drill pipe inner wall and the core or coal core. After the lowering ring moves to a suitable depth, the second drive motor pauses, and the device inside the lowering ring controls the grippers to tighten towards the center, clamping the core or coal core and tightening it towards the center. As the bottom of the grippers becomes thinner, the core or coal core can be broken off at this point. Then the second drive motor restarts, and the winding roller winds up the wire rope, pulling the lowering ring upwards, thereby pulling the coal core or core up from inside the drill pipe. After removing a section of the core or core, the above operation can be repeated to continue drilling downwards, and then the core or coal core left in the center of the borehole can be removed.

[0017] Step 3: When using a core drilling device to drill cores in rock or coal seams, workers can remove the water pipe that is stuck at the bottom of the water tank and point one end of the water pipe toward the contact point between the drill pipe and the ground. As the drill pipe rotates downward, the water inside the tank can flow out evenly through the water pipe, thereby wetting and cooling the drill pipe and the bottom drill bit. During the use of the core drilling device, the water in the tank can increase the counterweight of the entire device. After the core drilling device removes the rock or coal cores from inside the drill pipe, the storage box can be opened to store the rock or coal cores one by one inside the storage box.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] By opening a connecting hole on the mobile frame, the first drive motor, the first gear and the gear ring cooperate to drive the drill pipe and drill bit to rotate. After the adjustment component is adjusted, it can contact the drill pipe and transport the drill pipe downward. At the same time, the first threaded connecting pipe at one end of the drill pipe is threadedly connected to the threaded groove at the other end of another drill pipe. This allows drilling into coal seams and rock strata at different depths in the coal mine, thereby obtaining coal cores and rock cores at different depths, which facilitates the staff to investigate the coal mine conditions.

[0020] By setting an inner ring inside one of the drill pipes, a certain space is created between the coal core or rock core obtained from the borehole and the inner wall of the drill pipe. Subsequently, after the coring device enters the drill pipe downwards, it can use the grippers to clamp and pull up the coal core or rock core. During this process, the drill pipe does not need to move upwards to bring up the coal core or rock core, thus avoiding the drill pipe leaving the borehole and causing some gravel, carbon fragments, etc. around the borehole to fall into the borehole, causing the borehole to be blocked and affecting the subsequent drilling pipe to continue to coring rock and coal seams at a deeper depth along the borehole.

[0021] When using a coring device to retrieve coal or rock cores from inside the drill pipe, if the coal or rock core is very long, the position of the first folding frame in the adjusting assembly can be changed, thereby adjusting the distance between the two contact rollers. After the two contact rollers contact the rock or coal core, the coring device moves to one side, and the adjusting assembly can be used to remove the very long rock or coal core from inside the drill pipe. Attached Figure Description

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of an embodiment of the drilling core sampling device and drilling core sampling method provided by the present invention;

[0024] Figure 2 yes Figure 1 The rear view of the movable frame shown;

[0025] Figure 3 yes Figure 1 A cross-sectional view of the drilling apparatus shown;

[0026] Figure 4 yes Figure 1 The diagram shows the structure of the adjustment component;

[0027] Figure 5 yes Figure 4 The diagram shows the structure of the first folding frame;

[0028] Figure 6 yes Figure 1 The diagram shows the structure of the core sampling device.

[0029] In the diagram: 1. Movable frame; 2. Water tank; 3. Connecting hole; 4. First drive motor; 5. First rotating shaft; 6. First gear; 7. Support rod; 8. Gear ring; 9. Drilling device; 91. Drill pipe; 92. Threaded groove; 93. First threaded connecting pipe; 94. Inner ring; 95. Drill bit; 96. Second threaded connecting pipe; 97. First limiting groove; 10. Locking hole; 11. Adjustment assembly; 111. Third drive motor; 112. Threaded rod; 113. Limiting rod; 114. First folding frame; 115. Second limiting groove; 116. Electric telescopic rod; 117. Limiting ring; 118. Connecting rod; 119. Touch roller; 1110. Second gear; 1111. Second folding frame; 1112. Second rotating shaft; 1113. Third gear; 1114. Fourth drive motor; 12. Core taking device; 121. Support rod; 122. Fixing plate; 123. Second drive motor; 124. Winding roller; 125. Steel wire rope; 126. Limiting hole; 127. Lowering ring; 128. Gripper; 13. Enclosure; 14. Storage box; 15. Storage frame. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0031] Please see Figures 1-6 As shown, a core drilling device and method include a movable frame 1. A water tank 2 is fixedly installed at the bottom of the movable frame 1. A connecting hole 3 is opened at the top of the movable frame 1 and on one side of the water tank 2. A first drive motor 4 is fixedly installed at the top of the movable frame 1 and on one side of the connecting hole 3. One end of the output shaft of the first drive motor 4 is fixedly connected to a first rotating shaft 5 through a coupling. A first gear 6 is fixedly installed at the top of the first rotating shaft 5. Support rods 7 are evenly fixedly installed at the top of the movable frame 1 and around the connecting hole 3. The tops of the multiple support rods 7 slide... A toothed ring 8 is connected, and a drilling device 9 is threadedly connected to the middle of the toothed ring 8. The bottom end of the drilling device 9 extends to the bottom of the movable frame 1 through the connecting hole 3. A core-taking device 12 is rotatably installed on the top of the movable frame 1 and on one side of the toothed ring 8. A locking hole 10 is opened on the top of the movable frame 1 and at the bottom of the core-taking device 12. The bottom end of the core-taking device 12 extends into the interior of one of the locking holes 10 through a locking bolt. An adjustment component 11 is provided on the top of the movable frame 1 and on the other side of the toothed ring 8. Both ends of the adjustment component 11 extend to both sides of the outer surface of the drilling device 9.

[0032] The drilling device 9 includes multiple drill tubes 91. A threaded groove 92 is provided in the middle of the bottom end of each drill tube 91. A first threaded connecting pipe 93 is fixedly connected to the top end of each drill tube 91. An inner ring 94 is fixedly connected to the bottom of the inner wall of one of the drill tubes 91. A drill bit 95 is provided at the bottom end of one of the drill tubes 91. A second threaded connecting pipe 96 is fixedly connected to the top end of the drill bit 95. The top end of the second threaded connecting pipe 96 extends into the interior of the threaded groove 92. A first limiting groove 97 is provided on both sides of the inner wall of each of the multiple drill tubes 91.

[0033] It should be noted that a notch is provided on one side of the mobile frame 1. When using the core drilling device to drill and explore rock strata and coal seams, the operator can stand at this notch on the mobile frame 1, getting closer to the drilling device 9, the core sampling device 12, and the adjustment assembly 11, making it easier for the operator to perform various operations during core drilling. The water tank 2 is installed at the bottom of the mobile frame 1, and a flexible hose is installed at the bottom of the water tank 2. After being removed from the clip at the bottom of the water tank 2, one end of the hose can be placed on the side of the drilling device 9. When the drilling device 9 drills downwards, water flows downwards from the outside of the drill pipe 91, wetting and cooling the drill pipe 91 and the drill bit 95. At the same time, the water tank 2 contains a large amount of clean water, which can also be used to counterweight the core drilling device, ensuring the stability of the core drilling device during use. The connecting hole 3 is compatible with the drilling device 9. The first drive motor 4 is bolted to the mobile frame 1 and controlled by the control switch on the mobile frame 1. It is a servo motor and can perform true reverse rotation. The bottom of the gear ring 8 has an annular groove and four supports. The top of rod 7 extends into the annular groove at the bottom of gear ring 8. The first gear 6 is the driving gear, meshing with gear ring 8 and driving it to rotate. A threaded groove is provided in the middle of gear ring 8, which is threadedly connected to drilling device 9. When the core sampling device 12 is above drilling device 9 and affects the disassembly of drill pipe 91, the top of core sampling device 12 can be rotated to the side, and its position stabilized using a chuck. Adjustment component 11 engages with gear ring 8 to ensure that drilling device 9 can move stably downwards or upwards, and drill pipe 9... There are many types of drill pipes 91, but there is only one drill pipe 91 with an inner ring 94 welded inside. This drill pipe 91 is installed together with the drill bit 95. Under the restriction of the inner ring 94, the diameter of the rock core or coal core left by the drill hole is matched with the inner diameter of the inner ring 94. The first threaded connecting pipe 93 is rotated into the threaded groove 92, so that the drill pipes 91 can be connected together. The positions of the two first limiting grooves 97 are opened accordingly. Afterwards, when the core sampling device 12 enters the drill pipe 91, the position of the bottom end of the core sampling device 12 can be restricted.

[0034] In this application, the core-taking device 12 includes a support rod 121, a fixed plate 122 is fixedly connected to the top of the support rod 121, a second drive motor 123 is fixedly installed on one side of the top of the fixed plate 122, one end of the output shaft of the second drive motor 123 is fixedly connected to a winding roller 124 through a coupling, a wire rope 125 is provided on the surface of the winding roller 124, and limit holes 126 are provided on both sides of the top of the fixed plate 122 and the bottom of the winding roller 124, the end of the wire rope 125 extends to the bottom of the fixed plate 122 through the limit holes 126, a lower moving ring 127 is fixedly connected to the bottom end of the wire rope 125, the outer surface of the lower moving ring 127 contacts the inner wall of the drill pipe 91 through rollers, and grippers 128 are fixedly installed on all four sides of the bottom of the lower moving ring 127.

[0035] It should be noted that the bottom end of the support rod 121 is mounted together with the top of the moving frame 1 by means of a bearing. The second drive motor 123 is connected to an external power source through a power line. The wire rope 125 is wound on the winding roller 124. The wire rope 125 consists of two strands bound together. The two strands of wire rope 125 can be separated by two limiting holes 126, thereby binding and fixing them together with the two sides of the lower moving ring 127. When the wire rope 125 is wound on the winding roller 124, it can be restricted by the upper limit ring of the fixing plate 122, which facilitates the winding of the wire rope 125. The lower moving ring 127 is hollow inside, but its metal shell is heavy. The outer surface of the lower moving ring 127 is not very smooth, which reduces the friction between the drill pipe 91 and the rock core and coal core. A drive device is set inside the lower moving ring 127, which can drive multiple grippers 128 to retract towards the middle to clamp the rock core and coal core, and can also cut the rock core and coal core.

[0036] In this application, the adjustment component 11 includes a third drive motor 111, which is fixedly installed at the bottom of the movable frame 1. One end of the output shaft of the third drive motor 111 is fixedly connected to a threaded rod 112 via a coupling. The top end of the threaded rod 112 passes through the movable frame 1 and extends to the top of the movable frame 1. A limiting rod 113 is fixedly installed on the top of the movable frame 1 and on one side of the threaded rod 112.

[0037] In this application, a first folding frame 114 is threadedly connected to the surface of the threaded rod 112. One side of the first folding frame 114 is slidably connected to the limiting rod 113. A second limiting groove 115 is provided on both sides of the top of the first folding frame 114. An electric telescopic rod 116 is fixedly installed on the top of one side of the first folding frame 114. Limiting rings 117 are fixedly installed at both ends of the electric telescopic rod 116. A connecting rod 118 is provided inside the two limiting rings 117. One end of the two connecting rods 118 extends to one side of the first folding frame 114 through the second limiting groove 115. A touch roller 119 is fixedly connected to one end of the two connecting rods 118. A second gear 1110 is fixedly connected to the other end of the two connecting rods 118.

[0038] In this application, a second folding frame 1111 is fixedly installed on one side of the bottom of the first folding frame 114. Both ends of one side of the second folding frame 1111 are rotatably connected to a second rotating shaft 1112. A third gear 1113 is fixedly installed on one end of each of the two second rotating shafts 1112. The two third gears 1113 mesh with each other. The two sides of the two third gears 1113 mesh with two second gears 1110 respectively. A fourth drive motor 1114 is fixedly installed on one side of the second folding frame 1111. One end of the output shaft of the fourth drive motor 1114 is fixedly installed to one end of one of the second rotating shafts 1112 through a coupling.

[0039] It should be noted that the third drive motor 111 is installed at the bottom of the movable frame 1. Like the other drive motors, it is connected to the battery at the bottom of the movable frame 1 via a power cable and is powered by the battery. The third drive motor 111 is also a servo motor, capable of forward and reverse rotation. Like the other drive motors, it also has a self-locking function. The threaded rod 112 and the limiting rod 113 are arranged parallel to each other. When the first folding frame 114 moves up and down along the threaded rod 112, one end is restricted by the limiting rod 113, ensuring stable up and down movement of the first folding frame 114. Two second limiting slots 115 are oppositely formed on the first folding frame 114. The electric telescopic rod 116 is also powered by the battery at the bottom of the movable frame 1 via a power cable. Its control switch... Installed on the mobile frame 1, it is set together with the control switches of other drive motors for easy operation by the staff. Two limit rings 117 are welded to both ends of the electric telescopic rod 116 to support the two connecting rods 118. The touch roller 119 is installed at the end of the connecting rod 118 by screws. The surface of the touch roller 119 is arc-shaped, which can better fit the surface of the drill pipe 91. The surface of the touch roller 119 is relatively rough, which increases the friction between it and the drill pipe 91, thereby effectively conveying the drill pipe 91 downward or lifting it upward. When the two connecting rods 118 move towards the middle, the staff can rotate the two connecting rods 118 so that the two second gears 1110 can stably mesh with the third gears 1113 on both sides.

[0040] In this application, a barrier 13 is fixedly installed on the top edge of the mobile frame 1, a storage box 14 is fixedly installed on the top of the mobile frame 1 and on one side of the toothed ring 8, and a storage frame 15 is fixedly installed on the top of the storage box 14.

[0041] It should be noted that the enclosure 13 is fixed on the mobile frame 1. When the drill pipe 91 is placed on the mobile frame 1, it can block the drill pipe 91 and other parts to prevent them from rolling off the mobile frame 1. When moving the core drilling device, the mobile frame 1 can be used as a handle. After the storage box 14 is opened, the rock cores and coal cores extracted from the borehole can be stored. After the drill pipe 91 and drill bit 95 are disassembled, they can also be placed in the storage frame 15.

[0042] In specific implementation of this invention:

[0043] The specific steps of the core drilling method of this invention are as follows:

[0044] Step 1: Drill holes in the coal mine using a core drilling device to investigate the water layer, rock strata, and coal seam conditions. When drilling the rock strata and coal seam using the core drilling device, first, remove each drill pipe 91 and drill bit 95 from the storage frame 15 and place them on the moving frame 1. Then, rotate the inner ring 94 of the drilling device 9 (with the inner ring 94 fixed inside) to the left and install it in the toothed ring 8. Continue rotating the drill pipe 91 downwards until the bottom end of the drill pipe 91 extends through the connecting hole 3 on the moving frame 1 to the bottom of the moving frame 1. Then, from the bottom of the moving frame 1, it connects to the second threaded pipe on the drill bit 95. The drill pipe 96 is rotated and installed into the threaded groove 92 at the bottom of the drill pipe 91. The position of the adjusting assembly 11 is then adjusted by the control switch on the moving frame 1. During adjustment, the third drive motor 111 drives the threaded rod 112 to rotate. Under the constraint of the limiting rod 113, the first folding frame 114 can move downwards along the threaded rod 112. When the first folding frame 114 reaches a lower position, the third drive motor 111 pauses and locks, the electric telescopic rod 116 retracts, and the two connecting rods 118 move towards the center along the two second limiting grooves 115. At this time, the operator can rotate... Move the two connecting rods 118 to allow the two second gears 1110 to mesh with the two third gears 1113 respectively. After the two second gears 1110 and the two third gears 1113 are accurately meshed, the first drive motor 4 and the fourth drive motor 1114 can be started. The first drive motor 4 drives the drill pipe 91 to rotate by the gear ring 8, while the fourth drive motor 1114 drives the two contact rollers 119 to rotate in opposite directions by the third gear 1113 and the second gear 1110, so that the drill pipe 91 rotates downward continuously to drill holes in the rock strata and coal seams of the coal mine. When the top of one drill pipe 91 is about to move to When the two touch rollers 119 are in position, the fourth drive motor 1114 stops. At this time, the operator can take another drill pipe 91 from the moving frame 1 and align the threaded groove 92 at its bottom end with the first threaded connecting pipe 93 on the lower drill pipe 91. As the drill pipe 91 continues to rotate, the two drill pipes 91 can be threaded together. When the two drill pipes 91 are stably threaded together, the first limiting groove 97 inside the two drill pipes 91 is aligned. Then the fourth drive motor 1114 starts again and relies on the two touch rollers 119 to rotate downward together, so that the drill pipe 91 can continue to drill deeper into the rock strata and coal seam.

[0045] Step Two: During the process of drilling deeper into the rock strata or coal seam by adding drill pipe 91, when one drill pipe 91 has completely descended into the rock strata or coal seam, the first drive motor 4 and the fourth drive motor 1114 need to be paused. Then, the worker can remove the clasp at the bottom of the core sampling device 12 from one of the clasp holes 10 and rotate the core sampling device 12 to rotate the fixing plate 122 to the top of the drilling device 9. Then, the second drive motor 123 is started via the control switch on the moving frame 1, and the wire rope 125 wound on the winding roller 124 is unwound. The lowering ring 127, being heavy, can move downwards along with the lowering wire rope 125. When the lowering ring 127 and the clamping jaws 128 are about to descend to the drill pipe 91, the worker can adjust the position of the drill pipe 91 so that the positions of the two first limiting grooves 97 on both sides of the inner wall of the drill pipe 91 are aligned with the lowering ring. The position of the limiting block on the outer side of the ring 127 corresponds to the downward movement of the ring 127. When the ring 127 moves downward, it continues to move downward through the gap between the inner wall of the drill pipe 91 and the core or coal core. After the ring 127 moves down to a suitable depth, the second drive motor 123 stops, and the device inside the ring 127 controls the gripper 128 to tighten towards the middle, clamping the core or coal core and tightening towards the middle. Since the bottom of the gripper 128 becomes thinner and thinner, the core or coal core can be cut off at this point. Then the second drive motor 123 restarts, and the wire rope 125 is wound up by the winding roller 124, which can pull the ring 127 upward, thereby pulling the coal core or core up from inside the drill pipe 91. After a section of the core or core is taken out, the above operation can be repeated to continue drilling the drill pipe 91 downward, and then the core or coal core left in the center of the borehole can be taken out.

[0046] Step 3: When using the core drilling device to drill cores in rock or coal seams, the operator can remove the water pipe stuck at the bottom of the water tank 2 and point one end of the water pipe toward the contact point between the drill pipe 91 and the ground. When the drill pipe 91 rotates downward, the water inside the water tank 2 can flow out evenly through the water pipe, thereby wetting and cooling the drill pipe 91 and the bottom drill bit 95. During the use of the core drilling device, the water in the water tank 2 can increase the counterweight of the entire device. After the core drilling device 12 removes the rock core or coal core from the drill pipe 91, the storage box 14 can be opened to store the rock core or coal core inside the storage box 14.

[0047] By opening a connecting hole 3 on the mobile frame 1, the first drive motor 4, the first gear 6 and the gear ring 8 can cooperate to drive the drill pipe 91 and the drill bit 95 to rotate. After the adjustment component 11 is adjusted, it can contact the drill pipe 91 and transport the drill pipe 91 downward. At the same time, the first threaded connecting pipe 93 at one end of the drill pipe 91 is threadedly connected to the threaded groove 92 at the other end of the other drill pipe 91. This allows drilling of coal seams and rock strata at different depths in the coal mine, thereby obtaining coal cores and rock cores at different depths, which is convenient for staff to investigate the coal mine conditions.

[0048] By setting an inner ring 94 inside one of the drill pipes 91, a certain space is created between the coal core or rock core obtained from the borehole and the inner wall of the drill pipe 91. Subsequently, after the core sampling device 12 enters the drill pipe 91 downwards, it can use the grippers 128 to clamp and pull up the coal core or rock core. During this process, the drill pipe 91 does not need to move upwards to bring up the coal core or rock core, thus avoiding the drill pipe 91 leaving the borehole, which would cause some gravel, carbon fragments, etc. around the borehole to fall into the borehole, causing the borehole to be blocked and affecting the subsequent continuous core sampling of rock and coal seams along the borehole.

[0049] When using the core sampling device 12 to grab coal cores or rock cores from inside the drill pipe 91, if the coal core or rock core is very long, the distance between the two side contact rollers 119 can be adjusted by changing the position of the first folding frame 114 in the adjustment assembly 11. After the two contact rollers 119 contact the rock core or coal core, the core sampling device 12 moves to one side, and the adjustment assembly 11 can be used to remove the very long rock core or coal core from inside the drill pipe 91.

[0050] 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 any specific implementation. 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 core drilling device, comprising a movable frame (1), wherein a water tank (2) is fixedly mounted on the bottom of the movable frame (1), and a connecting hole (3) is provided on the top of the movable frame (1) and on one side of the water tank (2), characterized in that, A first drive motor (4) is fixedly installed on the top of the movable frame (1) and on one side of the connecting hole (3). One end of the output shaft of the first drive motor (4) is fixedly connected to a first rotating shaft (5) via a coupling. A first gear (6) is fixedly installed on the top of the first rotating shaft (5). Support rods (7) are evenly fixedly installed on the top of the movable frame (1) and around the connecting hole (3). A toothed ring (8) is slidably connected to the top of a plurality of support rods (7). A drilling device (9) is threadedly connected to the middle of the toothed ring (8). The bottom end of the drilling device (9) is connected to the first drive motor (4) via a coupling. A connecting hole (3) extends to the bottom of the movable frame (1). A core-taking device (12) is rotatably mounted on the top of the movable frame (1) and on one side of the toothed ring (8). A locking hole (10) is opened on the top of the movable frame (1) and at the bottom of the core-taking device (12). The bottom end of the core-taking device (12) extends into the interior of one of the locking holes (10) through a locking bolt. An adjustment component (11) is provided on the top of the movable frame (1) and on the other side of the toothed ring (8). Both ends of the adjustment component (11) extend to both sides of the outer surface of the drilling device (9). The drilling device (9) includes multiple drill tubes (91), with a threaded groove (92) in the middle of the bottom end of each drill tube (91). A first threaded connecting tube (93) is fixedly connected to the top end of each drill tube (91). An inner ring (94) is fixedly connected to the bottom of the inner wall of one of the drill tubes (91). A drill bit (95) is provided at the bottom end of one of the drill tubes (91). A second threaded connecting tube (96) is fixedly connected to the top end of the drill bit (95). The top end of the second threaded connecting tube (96) extends threadedly into the interior of the threaded groove (92). A first limiting groove (97) is provided on both sides of the inner wall of each of the multiple drill tubes (91). The adjustment assembly (11) includes a third drive motor (111), which is fixedly installed at the bottom of the movable frame (1). One end of the output shaft of the third drive motor (111) is fixedly connected to a threaded rod (112) via a coupling. The top end of the threaded rod (112) passes through the movable frame (1) and extends to the top of the movable frame (1). A limiting rod (113) is fixedly installed on the top of the movable frame (1) and on one side of the threaded rod (112). The threaded rod (112) is threadedly connected to a first folding frame (114). One side of the first folding frame (114) is slidably connected to the limiting rod (113). The top of the first folding frame (114) is provided with second limiting grooves (115) on both sides. An electric telescopic rod (116) is fixedly installed on the top of one side of the first folding frame (114). Limiting rings (117) are fixedly installed at both ends of the electric telescopic rod (116). Connecting rods (118) are provided inside the two limiting rings (117). One end of the two connecting rods (118) extends to one side of the first folding frame (114) through the second limiting groove (115). A touch roller (119) is fixedly connected to one end of the two connecting rods (118). A second gear (1110) is fixedly connected to the other end of the two connecting rods (118). A second folding frame (1111) is fixedly installed on one side of the bottom of the first folding frame (114). A second rotating shaft (1112) is rotatably connected to both ends of one side of the second folding frame (1111). A third gear (1113) is fixedly installed on one end of each of the two second rotating shafts (1112). The two third gears (1113) mesh with each other. The two sides of the two third gears (1113) mesh with the two second gears (1110) respectively. A fourth drive motor (1114) is fixedly installed on one side of the second folding frame (1111). One end of the output shaft of the fourth drive motor (1114) is fixedly installed to one end of one of the second rotating shafts (1112) through a coupling.

2. The core drilling device according to claim 1, characterized in that, The core-taking device (12) includes a support rod (121), and a fixing plate (122) is fixedly connected to the top of the support rod (121). A second drive motor (123) is fixedly installed on one side of the top of the fixing plate (122). One end of the output shaft of the second drive motor (123) is fixedly connected to a winding roller (124) through a coupling. A steel wire rope (125) is provided on the surface of the winding roller (124). The top of the fixing plate (122) is located at the... Limiting holes (126) are provided on both sides of the bottom of the winding roller (124). The end of the wire rope (125) extends to the bottom of the fixing plate (122) through the limiting holes (126). A lower moving ring (127) is fixedly connected to the bottom end of the wire rope (125). The outer surface of the lower moving ring (127) contacts the inner wall of the drill pipe (91) through rollers. Claws (128) are fixedly installed around the bottom of the lower moving ring (127).

3. The core drilling device according to claim 2, characterized in that, A guardrail (13) is fixedly installed on the top edge of the mobile frame (1), and a storage box (14) is fixedly installed on the top of the mobile frame (1) and on one side of the toothed ring (8), and a storage frame (15) is fixedly installed on the top of the storage box (14).

4. A core drilling device according to claim 2, characterized in that, The specific steps of the core drilling method for this device are as follows: Step 1: When drilling rock strata and coal seams using a core drilling device, first remove each drill pipe (91) and drill bit (95) from the storage frame (15) and place them on the moving frame (1). Then, rotate the inner ring (94) of the drilling device (9) with the inner ring (94) fixed inside towards the toothed ring (8). Continue to rotate the drill pipe (91) downwards until the bottom end of the drill pipe (91) extends to the bottom of the moving frame (1) through the connecting hole (3) on the moving frame (1). Then, rotate the drill pipe (91) from the bottom of the moving frame (1) to the threaded groove (92) at the bottom end of the drill pipe (91) through the second threaded connecting pipe (96) on the drill bit (95). In the middle, the position adjustment component (11) is adjusted by controlling the control switch on the moving frame (1). When the adjustment component (11) is adjusted, the third drive motor (111) drives the threaded rod (112) to rotate. Under the restriction of the limiting rod (113), the first folding frame (114) moves downward along the threaded rod (112). When the first folding frame (114) moves to a lower position, the third drive motor (111) pauses and locks, the electric telescopic rod (116) retracts, and the two connecting rods (118) move towards the middle along the two second limiting grooves (115). At this time, the worker rotates the two connecting rods (118) so that the two second gears (1110) meshes with two third gears (1113) respectively. After the two second gears (1110) and the two third gears (1113) are accurately meshed together, the first drive motor (4) and the fourth drive motor (1114) are started. The first drive motor (4) drives the drill pipe (91) to rotate by means of the gear ring (8), while the fourth drive motor (1114) drives the two touch rollers (119) to rotate in opposite directions by means of the third gear (1113) and the second gear (1110), so that the drill pipe (91) rotates downward continuously to drill holes in the rock strata and coal seams of the coal mine. When the top of one drill pipe (91) is about to move to the two touch rollers (119) At this time, the fourth drive motor (1114) stops. At this time, the staff takes another drill pipe (91) from the moving frame (1) and aligns the threaded groove (92) at the bottom of the drill pipe (91) with the first threaded connecting pipe (93) on the lower drill pipe (91). As the drill pipe (91) continues to rotate, the two drill pipes (91) are threaded together. When the two drill pipes (91) are stably threaded together, the first limiting groove (97) inside the two drill pipes (91) is aligned. Then the fourth drive motor (1114) starts again and relies on the two touch rollers (119) to rotate downward together, so that the drill pipe (91) continues to drill deeper into the rock strata and coal seam. Step 2: During the process of drilling deeper into the rock strata and coal seam by adding drill pipe (91), when one drill pipe (91) has completely descended into the rock strata or coal seam, the first drive motor (4) and the fourth drive motor (1114) need to be paused. Then, the worker removes the clasp from one of the clasps (10) at the bottom of the core sampling device (12) and rotates the core sampling device (12) so that the fixing plate (122) rotates to the top of the drilling device (9), and then... The control switch on the moving frame (1) starts the second drive motor (123), and the wire rope (125) wound on the winding roller (124) loosens. The lower moving ring (127) is heavy, and as the lowering wire rope (125) moves downward, the lower moving ring (127) and the gripper (128) are about to move down to the drill pipe (91). The operator adjusts the position of the drill pipe (91) so that the two first limiting grooves (9) on both sides of the inner wall of the drill pipe (91) are aligned. 7) The position corresponds to the position of the limiting block on the outside of the lowering ring (127). When the lowering ring (127) moves downward, it continues to move downward from the gap between the inner wall of the drill pipe (91) and the core or coal core. After the lowering ring (127) moves down to a suitable depth, the second drive motor (123) stops, and the device inside the lowering ring (127) controls the gripper (128) to tighten towards the middle, clamping the core or coal core and continuing to tighten towards the middle. Because the gripper (128) 8) The bottom becomes thinner and thinner, and the rock core or coal core is clamped off here. Then the second drive motor (123) restarts and the wire rope (125) is wound up by the winding roller (124). The lower moving ring (127) is pulled up, thereby pulling the coal core or rock core up from the inside of the drill pipe (91). After a section of coal core or rock core is taken out, the above operation is repeated to continue to increase the drilling pipe (91) to drill downwards. Then the rock core or coal core left in the center of the drill hole is taken out. Step 3: When using the core drilling device to drill cores in rock or coal seams, the staff removes the water pipe stuck at the bottom of the water tank (2) and points one end of the water pipe toward the contact point between the drill pipe (91) and the ground. When the drill pipe (91) rotates downward, the water inside the water tank (2) flows out evenly through the water pipe, thereby wetting and cooling the drill pipe (91) and the bottom drill bit (95). During the use of the core drilling device, the water in the water tank (2) increases the counterweight of the entire device. After the core drilling device (12) takes out the rock core or coal core drilled from the drill pipe (91), the storage box (14) is opened and the rock core or coal core is stored inside the storage box (14).

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