Self-propelled drilling device for coal mine

Abstract

The invention relates to the technical field of drilling devices, in particular to a self-propelled drilling device for a coal mine. The problem that in the working process of a cylinder drill, a motor is prone to being damaged due to jamming is solved. Comprising a vehicle body, a supporting frame is installed on the vehicle body, a clamping device and a driving motor are installed on the supporting frame, and a drilling cylinder and a connecting cylinder are installed at the position of the clamping device; the coupler is rotationally connected to the driving motor, and the coupler is in spline connection with the connecting cylinder; the rotating shell is connected to the coupler in a limiting and rotating mode, the rotating shell is connected with a sliding column in a sliding mode, and the sliding column is in transmission with an output shaft of the driving motor through a face gear. When the drilling barrel is stuck, the sliding column moves into the rotating shell, transmission between the sliding column and the output shaft of the driving motor is relieved, the possibility that the output shaft of the driving motor is damaged due to sudden stalling of the output shaft is reduced, and the safety of parts in the device and the stable construction progress are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of drilling devices, and in particular to a self-propelled drilling device used in coal mines. Background Art

[0002] A drilling device is a mechanical equipment used for drilling operations under various geological conditions. It is mainly used for drilling construction in mines, such as tunnel support, gas extraction, roof control, etc. The self-propelled drilling device used for underground coal mine operations is particularly suitable for deep hole drilling tasks. The self-propelled drilling device performs drilling operations through a barrel drill, and can judge and deal with dangerous situations in a certain section of the coal mine to ensure the safety and stability of the mine. During the operation of the existing self-propelled drilling device, when the barrel drill is used for drilling, if the barrel drill encounters a harder rock, the sudden change in the hardness of the rock formation may cause the barrel drill to get stuck. Since the existing drilling device usually uses a motor to directly drive the barrel drill for drilling operations, when the barrel drill gets stuck, the motor output shaft cannot rotate instantly, and the continuous high-load operation of the motor will cause it to overheat or burn out, increasing maintenance costs and extending downtime, seriously affecting the construction progress. Summary of the invention

[0003] In view of the problem that a barrel drill may get stuck during operation and thus easily cause damage to a motor, the present invention provides a self-propelled drilling device for a coal mine.

[0004] The technical solution is: a self-propelled drilling device for coal mines, comprising: a vehicle body, a support frame is installed on the vehicle body, an electric slide rail is arranged on the support frame, a clamping device and a driving motor are installed on the support frame through the electric slide rail, a drill barrel and a connecting barrel are installed on the clamping device, the drill barrel and the connecting barrel are connected by threads, and a plurality of crushing teeth are arranged on the end of the drill barrel away from the connecting barrel; a coupling, which is rotatably connected to the driving motor, and the coupling is splined to the connecting barrel; a rotating shell, which is limitedly rotatably connected to the coupling, and the rotating shell is slidably connected with a sliding column, and the opposite ends of the sliding column and the output shaft of the driving motor are both provided with face gears, and the sliding column and the output shaft of the driving motor are driven by face gears; a jam detection mechanism is arranged on the rotating shell, and is used to detect whether the drill barrel is stuck; a reversing mechanism is arranged on the driving motor, and is used to automatically reverse the drill barrel when it is stuck.

[0005] As a preferred embodiment of the present invention, the stuck detection mechanism includes: an elastic telescopic rod, which is fixedly connected to the rotating shell, the elastic telescopic rod is connected to a liquid guide tube, the liquid guide tube is connected to the rotating shell, the coupling moves the sliding column by squeezing the telescopic end of the elastic telescopic rod, and the elastic telescopic rod, the liquid guide tube and the rotating shell are all filled with hydraulic oil; a limit pin, which is slidably connected to the rotating shell, the coupling is provided with a blind hole, the limit pin limits the coupling through the blind hole, so that the coupling and the rotating shell rotate synchronously, the rotating shell is slidably connected to a support slide, and a first spring is fixed between the limit pin and the support slide.

[0006] As a preferred embodiment of the present invention, two communicating holes are provided at the connection point between the liquid guiding tube and the rotating shell, one of the two communicating holes is larger and the other is smaller, and a one-way valve is provided in the larger communicating hole on the rotating shell, and the one-way valve only allows the hydraulic oil in the rotating shell to enter the liquid guiding tube.

[0007] As a preferred embodiment of the present invention, the stuck detection mechanism also includes: a rotary rod, which is threadedly connected to the rotating shell, and the rotary rod is rotatably connected to the supporting slide plate. By rotating the rotary rod, the limit pin changes the connection strength between the rotating shell and the coupling according to different types of rock formations.

[0008] As a preferred embodiment of the present invention, the reversing mechanism includes: a fixed frame fixedly connected to the driving motor, the fixed frame is rotatably connected to the first rotating rod, the fixed frame is slidably connected to the second rotating rod, the opposite ends of the first rotating rod and the second rotating rod are provided with face gears, the first rotating rod and the second rotating rod are driven by the face gears, the second rotating rod and the output shaft of the driving motor are driven by a gear set, and the first rotating rod and the rotating shell are driven by a gear set; a sliding frame is limitedly rotatably connected to the sliding column, the sliding frame is rotatably connected to the first rotating rod, one end of the sliding frame is provided with a cavity, a connecting bent rod is slidably connected to the cavity of the sliding frame, the sliding frame and the connecting bent rod are dynamically sealed, and the connecting bent rod is limitedly rotatably connected to the second rotating rod; a disconnect component is arranged on the rotating shell, and is used to detect whether the drill barrel is unstuck when it is reversed.

[0009] As a preferred embodiment of the present invention, the disconnection assembly includes: a fixed telescopic rod, fixedly connected to the rotating shell, the coupling disconnects the transmission between the first rotating rod and the second rotating rod by squeezing the telescopic end of the fixed telescopic rod, and the fixed telescopic rod is connected to a guide tube; an annular shell, rotatably connected to the rotating shell, the annular shell is rotatably connected to an annular plate, the annular shell and the annular plate are dynamically sealed, and the guide tube is connected to the annular shell through the annular plate; a connecting pipe, connected to the annular shell, the connecting pipe is connected to the cavity of the sliding frame, and the cavities of the fixed telescopic rod, the guide tube, the annular shell, the connecting pipe and the sliding frame are all filled with hydraulic oil.

[0010] As a preferred embodiment of the present invention, it also includes: a fixing mechanism, which is arranged in the drill barrel and is used to fix the rock core inside the drill barrel, and the fixing mechanism includes: a fixing barrel, which is rotatably connected to one end of the drill barrel, and a circumferentially distributed support plate is slidably connected in the fixing barrel, and a second spring is fixed between the support plate and the fixing barrel, and the support plate is used to fix the rock core moving into the fixing barrel; a suspension detection component is arranged in the drill barrel and is used to detect whether the drill barrel enters a crack.

[0011] As a preferred embodiment of the present invention, the suspension detection component includes: a plurality of arc-shaped slides, which are slidably connected in the drill barrel, a third spring is fixedly connected between the arc-shaped slide and the drill barrel, a slope is provided at the contact point of two adjacent arc-shaped slides, the arc-shaped slide squeezes the support plate to move the support plate into the fixed barrel; a plurality of fixed plates, which are respectively fixed to the corresponding arc-shaped slides, the fixed plates are slidably connected to the drill barrel, a fixed block is provided on the part of the fixed plate located outside the drill barrel, the fixed block of the fixed plate is provided with an slope, and the fixed block of the fixed plate is used to detect whether the drill barrel enters the crack.

[0012] As a preferred embodiment of the present invention, the cross-section of the arc-shaped slide along the axis direction of the drill barrel is a right-angled trapezoid, and a plurality of the arc-shaped slides jointly squeeze the fixed barrel so that the fixed barrel is centered in the drill barrel, and the support plate only contacts the inclined surface of the arc-shaped slide.

[0013] As a preferred embodiment of the present invention, the thickness of the fixed block of the fixed plate is smaller than the thickness of the drill barrel crushing teeth, and the inclination direction of the inclined surface of the fixed block on the fixed plate is opposite to the inclination direction of the adjacent crushing teeth on the drill barrel, which is used to prevent the fixed block of the fixed plate from crushing the rock layer at the bottom of the drill hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the drill barrel is stuck, the present invention releases the transmission between the sliding column and the output shaft of the drive motor by moving the sliding column into the rotating shell, thereby reducing the possibility of damage to the output shaft of the drive motor caused by sudden stoppage, thereby ensuring the safety of the parts in the device and a stable construction progress.

[0015] 2. The present invention moves the second rotating rod in the reversing mechanism to transmit the first rotating rod and the second rotating rod, controls the reversal of the rotating shell, attempts to release the stuck state of the drill tube, prevents the drill tube from being simply stuck and delaying the progress of the project, and reduces the frequency of shutdown of the device.

[0016] 3. The present invention detects the position of the drill tube by means of a fixed plate in a suspended detection assembly, so that the support plate fixes the core after the drill tube enters the crack, thereby preventing the core from falling into the crack and affecting the operator's judgment of the crack position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the parts of the support frame and the driving motor of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the parts at the connecting cylinder and the coupling of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the elastic telescopic rod and the liquid guiding tube parts of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the parts of the coupling and the sliding column of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the parts of the limit pin and the supporting slide plate of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the parts of the annular shell and the annular plate of the present invention; Figure 8 It is a cross-sectional view of the sliding frame and the parts at the connection bending rod of the present invention; Fig. 9 It is a cross-sectional view of the parts of the drill tube and the connecting tube of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the parts of the fixed cylinder and the arc-shaped slide plate of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the parts at the support plate and the fixing plate of the present invention.

[0018] Marked in the figure: 1-car body, 2-support frame, 3-clamping device, 4-drive motor, 5-drill barrel, 6-connecting barrel, 7-coupling, 8-rotating shell, 9-sliding column, 201-elastic telescopic rod, 202-liquid guide tube, 203-limit pin, 204-support slide plate, 301-rotating rod, 401-fixed frame, 402-first rotating rod, 403-second rotating rod, 404-sliding frame, 405-connecting bent rod, 501-fixed telescopic rod, 502-guide tube, 503-annular shell, 504-annular plate, 505-connecting tube, 601-fixed barrel, 602-support plate, 701-arc slide plate, 702-fixed plate. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1 -Attached Fig.11 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Example 1: During the process of drilling by a self-propelled drilling device using a barrel drill, the motor in the self-propelled drilling device directly drives the barrel drill to rotate. If the barrel drill encounters a harder rock during the drilling process, the barrel drill is prone to getting stuck, causing the output shaft of the motor to stop rotating instantly. If the motor cannot be shut down in time, the continuous high-load operation of the motor will cause it to overheat and burn, resulting in an increase in the maintenance time of the self-propelled drilling device, seriously affecting the construction progress.

[0021] A self-propelled drilling device for coal mines, please refer to the attached Figure 1 -Attached Figure 6As shown, it includes: a vehicle body 1, a support frame 2 is installed on the vehicle body 1, an electric slide rail is arranged on the support frame 2, a clamping device 3 and a driving motor 4 are installed on the support frame 2 through the electric slide rail, a drill tube 5 and a connecting tube 6 are installed at the clamping device 3, the drill tube 5 and the connecting tube 6 are connected by threads, and a plurality of crushing teeth are arranged at one end of the drill tube 5 away from the connecting tube 6; a coupling 7 is rotatably connected to the driving motor 4, and the coupling 7 is spline-connected to the connecting tube 6; a rotating shell 8 is limitedly rotatably connected to the coupling 7, and the rotating shell 8 is slidably connected There is a sliding column 9, and the sliding column 9 and the output shaft of the driving motor 4 are both provided with face gears at the opposite ends. The sliding column 9 and the output shaft of the driving motor 4 are driven by the face gears; a stuck detection mechanism is arranged on the rotating shell 8, and is used to detect whether the drill tube 5 is stuck; a reversing mechanism is arranged on the driving motor 4, and is used to automatically reverse the drill tube 5 when it is stuck. The stuck detection mechanism includes: an elastic telescopic rod 201, which is fixed to the rotating shell 8, and the elastic telescopic rod 201 is connected to a liquid guide tube 202, which is connected to the rotating shell 8, and the liquid guide tube 202 is connected to the rotating shell 8. The shaft device 7 moves the sliding column 9 by squeezing the telescopic end of the elastic telescopic rod 201. The elastic telescopic rod 201, the liquid guide tube 202 and the rotating shell 8 are all filled with hydraulic oil; the limit pin 203 is slidably connected to the rotating shell 8. A blind hole is provided on the coupling 7. The limit pin 203 limits the coupling 7 through the blind hole, so that the coupling 7 and the rotating shell 8 rotate synchronously. The rotating shell 8 is slidably connected to the supporting slide 204. A first spring is fixed between the limit pin 203 and the supporting slide 204. The liquid guide tube 202 and the rotating shell Two connecting holes are provided at the connecting point of 8, one of the two connecting holes is larger and the other is smaller. A one-way valve is provided in the larger connecting hole on the rotating shell 8, and the one-way valve only allows the hydraulic oil in the rotating shell 8 to enter the liquid guide tube 202. The stuck detection mechanism also includes: a rotating rod 301, which is threadedly connected to the rotating shell 8, and the rotating rod 301 is rotatably connected to the supporting slide plate 204. By rotating the rotating rod 301, the limit pin 203 changes the connection strength between the rotating shell 8 and the coupling 7 according to different types of rock formations.

[0022] In the above scheme, it is intended to solve the problem that when the drill tube 5 is stuck during the drilling process, the output shaft of the drive motor 4 suddenly stops rotating. If the drive motor 4 cannot be turned off in time, the drive motor 4 is easily damaged. A control box is arranged on the vehicle body 1, and the clamping device 3 and the drive motor 4 are electrically connected to the control box. The device can make multiple connecting tubes 6 threadedly connected in sequence, and the drill tube 5 is connected at the front end to perform drilling of different depths. The coupling 7 is an existing mechanism (not shown in its internal structure diagram). The coupling 7 is splined with the connecting tube 6 so that the connecting tube 6 rotates synchronously with the coupling 7. Initially, the sliding column 9 and the output shaft of the drive motor 4 are driven by a face gear. The diameter of the circle where the tips of all the crushing teeth of the drill tube 5 are located is larger than the diameters of the drill tube 5 and the connecting tube 6, which is used to discharge the broken stones from the drilled hole along the gap between the connecting tube 6 and the inner wall of the drilled hole. Initially, the rotating shell 8 limits the coupling 7 through the limit pin 203, and the rotating shell 8 and the coupling 7 are relatively fixed.

[0023] The elastic telescopic rod 201 is an existing mechanism (composed of a cylinder, a sliding rod, a piston and a spring, the sliding rod drives the piston to slide sealedly in the cylinder, and the spring keeps the sliding rod in an extended state). The driving motor 4 pushes the drill tube 5 to drill by moving along the electric slide rail of the support frame 2. When the clamping device 3 clamps the connecting tube 6 in the drill hole, the connecting tube 6 can only rotate. Through the relative movement of the rotating shell 8 and the sliding column 9, the face gear transmission between the sliding column 9 and the output shaft of the driving motor 4 is released, reducing the possibility of damage to the output shaft of the driving motor 4 due to sudden stoppage, thereby ensuring the safety of the parts in the device and a stable construction progress.

[0024] Workflow: When the operator uses the device to perform drilling operations, the operator controls the vehicle body 1 to move to the position to be drilled, and then adjusts the inclination angle of the support frame 2 so that the drill barrel 5 is facing the position to be drilled, and the axis of the drill barrel 5 coincides with the axis of the hole to be drilled. Then the operator starts the drive motor 4 through the control box, and the output shaft of the drive motor 4 drives the drill barrel 5 and the connecting barrel 6 to rotate synchronously clockwise (from right to left) through the sliding column 9, the rotating shell 8 and the coupling 7. When the rotation speed of the drill barrel 5 and the connecting barrel 6 is stable, the control box controls the drive motor 4 to move forward along the electric slide rail of the support frame 2, and the output shaft of the drive motor 4 pushes the drill barrel 5 and the connecting barrel 6 to move synchronously, and the drill barrel 5 contacts the rock wall and gradually drills into the rock wall.

[0025] During the process of the drive motor 4 moving forward, when the drive motor 4 moves forward to the extreme position, the drive motor 4 moves backward and resets along the electric slide rail of the support frame 2, and the clamping device 3 clamps the connecting tube 6 to prevent the connecting tube 6 from sliding out of the drill hole. The connection between the connecting tube 6 and the coupling 7 is disconnected, and the drill tube 5 and the connecting tube 6 stop rotating. Then the vehicle body 1 moves a new connecting tube 6 to the clamping device 3, and the drive motor 4 moves forward again. The coupling 7 contacts and drives the new connecting tube 6 to rotate synchronously. The two connecting tubes 6 are gradually threadedly connected, and the fixation of the clamping device 3 is released. The drive motor 4 drives the drill tube 5 and the connecting tube 6 to continue the drilling operation. The above operation is repeated continuously to splice the connecting tube 6 until the set drilling depth is reached, and then the drive motor 4 is turned off and controlled to move and reset.

[0026] During the drilling process of the drill tube 5, if the drill tube 5 is stuck, the drill tube 5 and the connecting tube 6 stop rotating, and the output shaft of the driving motor 4 only drives the rotating shell 8 and the sliding column 9 to rotate through the face gear, and the blind hole of the coupling 7 squeezes the limit pin 203, and the limit pin 203 moves out of the blind hole of the coupling 7 and compresses the connected first spring, and the limit pin 203 releases the limit on the coupling 7, and the rotating shell 8 drives the elastic telescopic rod 201 to rotate clockwise (from right to left) relative to the coupling 7, and the telescopic end of the elastic telescopic rod 201 squeezes the coupling 7, and the telescopic end of the elastic telescopic rod 201 contracts, and the hydraulic oil in the rotating shell 8 is released through the one-way The valve and the liquid guide tube 202 enter the elastic telescopic rod 201, the hydraulic oil in the rotating shell 8 is reduced, the sliding column 9 moves into the rotating shell 8, and the transmission between the sliding column 9 and the output shaft of the driving motor 4 is released. At the same time, the output shaft of the driving motor 4 drives the rotating shell 8 and the sliding column 9 to rotate in the opposite direction through the reversing mechanism. When the limit pin 203 is aligned with the blind hole of the coupling 7, the limit pin 203 is reinserted into the blind hole of the coupling 7 under the elastic force of the connected first spring, and the coupling 7 and the rotating shell 8 are restored to be relatively fixed. The coupling 7 and the rotating shell 8 drive the drill tube 5 and the connecting tube 6 to rotate in the opposite direction, trying to release the stuck state of the drill tube 5.

[0027] If the stuck state of the drill tube 5 is released, the sliding column 9 drives the drill tube 5 and the connecting tube 6 to rotate in the opposite direction, and the hydraulic oil in the elastic telescopic rod 201 slowly flows back into the rotating shell 8 through the guide tube 202 and the smaller connecting hole, and the telescopic end of the elastic telescopic rod 201 is gradually extended. When the telescopic end of the elastic telescopic rod 201 returns to the initial state, the reversing mechanism loses connection, and the output shaft of the drive motor 4 directly drives the sliding column 9 to rotate synchronously, and the drill tube 5 and the connecting tube 6 rotate clockwise (from right to left) again, and the above-mentioned drilling operation is performed again. If the stuck state of the drill tube 5 is not released, as the sliding column 9 rotates, the limit pin 203 is re-engaged. The coupling 7 is newly removed from the blind hole of the coupling 7, the coupling 7 and the rotating shell 8 rotate relative to each other, the transmission of the reversing mechanism is released, and when the output shaft of the drive motor 4 continues to rotate, the sliding column 9 does not rotate. Finally, the control box turns off the drive motor 4 and waits for the operator to repair it. When the drilling is completed, the drive motor 4 moves and resets, and the clamping device 3 clamps the connecting tube 6 and moves backward to pull the drill tube 5 and the connecting tube 6 out of the drill hole. When the connecting tube 6 and the coupling 7 are in contact, the output shaft of the drive motor 4 is reversed to remove the connecting tube 6. The clamping device 3 repeats the forward and backward movement until the drill tube 5 moves out of the drill hole, and all parts are restored to their initial positions.

[0028] Please refer to the attached Figure 3 , Attachment Figure 7 and attached Figure 8As shown, the reversing mechanism includes: a fixed frame 401, which is fixed to the driving motor 4, a first rotating rod 402 is rotatably connected to the fixed frame 401, a second rotating rod 403 is slidably connected to the fixed frame 401, the first rotating rod 402 and the second rotating rod 403 are provided with face gears at opposite ends, the first rotating rod 402 and the second rotating rod 403 are driven by the face gears, the second rotating rod 403 and the output shaft of the driving motor 4 are driven by a gear set, and the first rotating rod 402 and the rotating shell 8 are driven by a gear set; a sliding frame 404 is limitedly rotatably connected to the sliding column 9, the sliding frame 404 is rotatably connected to the first rotating rod 402, a cavity is provided at one end of the sliding frame 404, a connecting bent rod 405 is slidably connected in the cavity of the sliding frame 404, the sliding frame 404 and the connecting bent rod 405 are dynamically sealed, and the connecting bent rod 405 is connected to the second rotating rod 403. Limiting rotation connection; a disconnection component, which is arranged on the rotating shell 8 and is used to detect whether the drill tube 5 is unstuck when it is reversed. The disconnection component includes: a fixed telescopic rod 501, which is fixed to the rotating shell 8. The coupling 7 disconnects the transmission between the first rotating rod 402 and the second rotating rod 403 by squeezing the telescopic end of the fixed telescopic rod 501. The fixed telescopic rod 501 is connected with a guide tube 502; an annular shell 503, which is rotatably connected to the rotating shell 8. The annular shell 503 is rotatably connected with an annular plate 504. The annular shell 503 and the annular plate 504 are dynamically sealed. The guide tube 502 is connected with the annular shell 503 through the annular plate 504; a connecting pipe 505, which is connected to the annular shell 503. The connecting pipe 505 is connected with the cavity of the sliding frame 404. The cavities of the fixed telescopic rod 501, the guide tube 502, the annular shell 503, the connecting pipe 505 and the sliding frame 404 are all filled with hydraulic oil.

[0029] In the above scheme, it is intended to solve the problem that if the jam of the drill tube 5 can be released by a small reverse rotation, the device still stops waiting for the operator to repair it, delaying the construction progress of the project; the output shaft of the drive motor 4 rotates in the opposite direction with the second rotating rod 403 through a gear set (the gear set has two gear transmissions), the gear set between the first rotating rod 402 and the rotating shell 8 has three gear transmissions, the first rotating rod 402 rotates in the same direction as the rotating shell 8 through the gear set, and the second rotating rod 403 continues to maintain the gear set transmission with the output shaft of the drive motor 4 during the movement, and the first rotating rod 402 and the first rotating rod 403 are connected. The spacing between the gears on the two rotating rods 403 is greater than the meshing distance between the output shaft of the driving motor 4 and the sliding column 9, so that only one of the transmission between the output shaft of the driving motor 4 and the sliding column 9 and the rotation between the first rotating rod 402 and the second rotating rod 403 exists at the same time. The connecting tube 505 is a hard tube, so that when the rotating shell 8 rotates, the annular shell 503 does not rotate, and the annular plate 504 rotates synchronously. The functions of the fixed telescopic rod 501 and the elastic telescopic rod 201 are similar. The fixed telescopic rod 501 contracts through the telescopic end, so that the transmission between the output shaft of the driving motor 4 and the sliding column 9 is completely disconnected.

[0030] Working process: during the drilling process of the drill tube 5, the first rotating rod 402 rotates in the same direction as the rotating shell 8, and the second rotating rod 403 rotates in the opposite direction with the output shaft of the driving motor 4. When the drill tube 5 is stuck, the coupling 7 and the rotating shell 8 rotate relative to each other, and the sliding column 9 moves into the rotating shell 8. The transmission between the sliding column 9 and the output shaft of the driving motor 4 is released, and the sliding column 9 drives the second rotating rod 403 to move forward through the sliding frame 404 and the connecting bent rod 405. The first rotating rod 402 and the second rotating rod 403 begin to rotate synchronously through the face gear, and the driving motor When the output shaft of the drill pipe 5 is rotated in the same direction, the rotating housing 8 is rotated in the opposite direction through the first rotating rod 402, the second rotating rod 403 and the gear set to try to release the stuck state of the drill pipe 5. If the stuck state is released when the drill pipe 5 is reversed, the telescopic end of the elastic telescopic rod 201 slowly extends out and resets as the drill pipe 5 is reversed, and the sliding column 9 gradually extends out of the rotating housing 8. The transmission between the first rotating rod 402 and the second rotating rod 403 is released first. After the sliding column 9 is reset, the sliding column 9 and the output shaft of the driving motor 4 resume transmission, and the drill pipe 5 continues to perform the drilling operation.

[0031] If the drill tube 5 is stuck but not released, the rotating shell 8 drives the fixed telescopic rod 501 to rotate counterclockwise (from right to left) relative to the coupling 7, the telescopic end of the fixed telescopic rod 501 squeezes the coupling 7, the telescopic end of the fixed telescopic rod 501 shrinks, and the hydraulic oil in the fixed telescopic rod 501 enters the cavity of the sliding frame 404 through the guide tube 502, the annular shell 503 and the connecting tube 505, the connecting bent rod 405 moves backward relative to the sliding frame 404, the transmission between the first rotating rod 402 and the second rotating rod 403 is released, the drill tube 5 and the connecting tube 6 remain stationary, and finally the control box turns off the drive motor 4 and waits for the operator to repair. When the operator releases the jam of the drill tube 5, the connecting bent rod 405 is manually pushed to reset, the hydraulic oil in the guide tube 502 and the connecting tube 505 flows in the opposite direction, and the telescopic end of the fixed telescopic rod 501 extends out and resets. At this point, all parts are restored to their initial positions and the above-mentioned drilling operation is continued.

[0032] Example 2: Based on Example 1, please refer to the attached Fig. 9 -Attached Fig.11As shown, it also includes: a fixing mechanism, which is arranged in the drill barrel 5 and is used to fix the rock core inside the drill barrel 5, and the fixing mechanism includes: a fixing barrel 601, which is rotatably connected to one end of the drill barrel 5, and a circumferentially distributed support plate 602 is slidably connected in the fixing barrel 601, and a second spring is fixedly connected between the support plate 602 and the fixing barrel 601, and the support plate 602 is used to fix the rock core moving into the fixing barrel 601; a suspended detection component, which is arranged in the drill barrel 5 and is used to detect whether the drill barrel 5 enters the crack, and the suspended detection component includes: a plurality of arc-shaped slide plates 701, which are slidably connected in the drill barrel 5, and a third spring is fixedly connected between the arc-shaped slide plates 701 and the drill barrel 5, and an inclined surface is provided at the contact point of two adjacent arc-shaped slide plates 701, and the arc-shaped slide plates 701 squeeze the support plate 602 to make the support plate 602 move into the fixing barrel 601; A fixed plate 702 is respectively fixed to the corresponding arc-shaped slide plate 701, and the fixed plate 702 is slidably connected to the drill barrel 5. The part of the fixed plate 702 located outside the drill barrel 5 is provided with a fixed block. The fixed block of the fixed plate 702 is provided with an inclined surface. The fixed block of the fixed plate 702 is used to detect whether the drill barrel 5 enters the crack. The cross-section of the arc-shaped slide plate 701 along the axial direction of the drill barrel 5 is a right-angle trapezoid. Multiple arc-shaped slide plates 701 jointly squeeze the fixed tube 601 so that the fixed tube 601 is centered in the drill barrel 5. The support plate 602 only contacts with the inclined surface of the arc-shaped slide plate 701. The thickness of the fixed block of the fixed plate 702 is less than the thickness of the crushing teeth of the drill barrel 5. The inclination direction of the inclined surface of the fixed block on the fixed plate 702 is opposite to the inclination direction of the adjacent crushing teeth on the drill barrel 5, which is used to prevent the fixed block of the fixed plate 702 from crushing the rock formation at the bottom of the borehole.

[0033] In the above scheme, it is intended to solve the problem that after the drill tube 5 is drilled into the crack in the rock formation, the rock core in the drill tube 5 is easy to fall into the crack, which affects the operator's judgment of the crack position; the spring connected to the support plate 602 is initially in a compressed state, and the elastic coefficient of the second spring connected to the support plate 602 is smaller than the elastic coefficient of the third spring connected to the arc-shaped slide plate 701, so that when the arc-shaped slide plate 701 moves, the support plate 602 is used to fix the rock core in the fixed tube 601, and the fixed tube 601 is located in the drill tube 5 near the crushing tooth, which is used to prevent the rock core from slipping out of the drill tube 5. The inner diameter of the support plate 602 is the same as the inner diameter of the drill tube 5. The support plate 602 is an arc-shaped plate. The concave surface of the support plate 602 is flush with the inner side surface of the fixed tube 601, which is used to ensure that the core passes through the fixed tube 601 stably. All arc-shaped slide plates 701 together form a circular ring. The thickness of the circular ring is equal to the gap between the fixed tube 601 and the drill tube 5, so that the inner side surface of the fixed tube 601 is flush with the inner side surface of the drill tube 5. Initially, the distance between the tip of the fixed block on the fixed plate 702 and the end surface of the drill tube 5 is greater than the thickness of the crushing teeth on the drill tube 5, so that the fixed block on the fixed plate 702 contacts the rock wall before the crushing teeth.

[0034] Working process: in the process of driving motor 4 to move forward and push drill tube 5 to drill, when drill tube 5 contacts rock wall, fixed block of fixed plate 702 contacts and squeezes rock wall first, fixed plate 702 moves into drill tube 5, fixed plate 702 pushes arc-shaped slide plate 701 to compress third spring, all support plates 602 move away from each other under the elastic force of second spring, concave surface of support plate 602 is flush with inner side surface of fixed tube 601, as drill tube 5 drills, rock core gradually enters drill tube 5 and passes through fixed tube 601, as drill tube 5 drills, fixed plate 702 always keeps contact with bottom of borehole, inclined surface of fixed block on fixed plate 702 is squeezed with gravel, so as to prevent fixed block on fixed plate 702 from impacting rock formation at bottom of borehole Broken, if the drill barrel 5 enters the crack part in the rock formation, when the fixed block part of the fixed plate 702 loses contact with the rock formation, the arc-shaped slide plate 701 drives the fixed plate 702 to extend out of the drill barrel 5 under the elastic force of the connected third spring, and the arc-shaped slide plate 701 squeezes the support plate 602, pushing the support plate 602 into the fixed cylinder 601, and the support plate 602 compresses the second spring. The support plate 602 fixes the rock core in the fixed cylinder 601 to prevent the rock core from slipping out of the drill barrel 5. When the drill barrel 5 moves to the edge of the crack, the fixed plate 702 is pushed back into the drill barrel 5, the fixation of the rock core is released, and the drilling operation is performed again. When the drill barrel 5 and the connecting cylinder 6 are moved out of the borehole, the support plate 602 fixes the rock core to ensure that the rock core is completely removed.

[0035] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A self-propelled drilling device for coal mines, characterized in that: include: A vehicle body (1), wherein a support frame (2) is mounted on the vehicle body (1), an electric slide rail is arranged on the support frame (2), a clamping device (3) and a drive motor (4) are mounted on the support frame (2) via the electric slide rail, a drill tube (5) and a connecting tube (6) are mounted on the clamping device (3), the drill tube (5) and the connecting tube (6) are connected via threads, and a plurality of crushing teeth are arranged at one end of the drill tube (5) away from the connecting tube (6); A coupling (7) is rotatably connected to the drive motor (4), and the coupling (7) is spline-connected to the connecting tube (6); A rotating shell (8) is connected to the coupling (7) in a limited rotational manner, the rotating shell (8) is slidably connected to a sliding column (9), the sliding column (9) and the output shaft of the drive motor (4) are both provided with face gears at the opposite ends thereof, and the sliding column (9) and the output shaft of the drive motor (4) are driven by the face gears; A jam detection mechanism, arranged on the rotating shell (8), for detecting whether the drill tube (5) is jammed; A reversing mechanism is provided on the driving motor (4) and is used to automatically reverse the drill tube (5) when it is stuck.

2. A self-propelled drilling device for coal mines according to claim 1, characterized in that: The stuck detection mechanism comprises: an elastic telescopic rod (201) fixedly connected to the rotating shell (8); the elastic telescopic rod (201) is connected to a liquid guide tube (202); the liquid guide tube (202) is connected to the rotating shell (8); the coupling (7) moves the sliding column (9) by squeezing the telescopic end of the elastic telescopic rod (201); and hydraulic oil is filled in the elastic telescopic rod (201), the liquid guide tube (202) and the rotating shell (8); A limit pin (203) is slidably connected to the rotating shell (8); a blind hole is provided on the coupling (7); the limit pin (203) limits the coupling (7) through the blind hole, so that the coupling (7) and the rotating shell (8) rotate synchronously; the rotating shell (8) is slidably connected to a supporting slide plate (204); and a first spring is fixedly connected between the limit pin (203) and the supporting slide plate (204).

3. A self-propelled drilling device for coal mines according to claim 2, characterized in that: Two communication holes are provided at the connection point between the liquid guide tube (202) and the rotating shell (8), one of the two communication holes being a larger communication hole and the other being a smaller communication hole, and a one-way valve is provided in the larger communication hole on the rotating shell (8), the one-way valve only allowing the hydraulic oil in the rotating shell (8) to enter the liquid guide tube (202).

4. A self-propelled drilling device for coal mines according to claim 3, characterized in that: The stuck detection mechanism also includes: A rotary rod (301) is threadedly connected to the rotating shell (8), and the rotary rod (301) is rotatably connected to the supporting slide plate (204). By rotating the rotary rod (301), the limit pin (203) changes the connection strength between the rotating shell (8) and the coupling (7) according to different types of rock formations.

5. A self-propelled drilling device for coal mines according to claim 4, characterized in that: The reversing mechanism comprises: A fixed frame (401) is fixedly connected to the driving motor (4); a first rotating rod (402) is rotatably connected to the fixed frame (401); a second rotating rod (403) is slidably connected to the fixed frame (401); opposite ends of the first rotating rod (402) and the second rotating rod (403) are both provided with face gears; the first rotating rod (402) and the second rotating rod (403) are driven by face gears; the second rotating rod (403) and the output shaft of the driving motor (4) are driven by a gear set; and the first rotating rod (402) and the rotating shell (8) are driven by a gear set; A sliding frame (404) is connected to the sliding column (9) in a limited rotational manner, the sliding frame (404) is rotationally connected to the first rotating rod (402), a cavity is provided at one end of the sliding frame (404), a connecting bent rod (405) is slidably connected in the cavity of the sliding frame (404), a dynamic seal is provided between the sliding frame (404) and the connecting bent rod (405), and the connecting bent rod (405) is connected to the second rotating rod (403) in a limited rotational manner; A disconnecting assembly is arranged on the rotating shell (8) and is used to detect whether the drill tube (5) is unstuck when it is reversed.

6. A self-propelled drilling device for coal mines according to claim 5, characterized in that: The disconnect assembly comprises: A fixed telescopic rod (501) is fixedly connected to the rotating shell (8); the coupling (7) disconnects the transmission between the first rotating rod (402) and the second rotating rod (403) by squeezing the telescopic end of the fixed telescopic rod (501); the fixed telescopic rod (501) is connected to a guide pipe (502); an annular shell (503) rotatably connected to the rotating shell (8); the annular shell (503) is rotatably connected to an annular plate (504); a dynamic seal is formed between the annular shell (503) and the annular plate (504); and the flow guide pipe (502) is connected to the annular shell (503) via the annular plate (504); A connecting pipe (505) is connected to the annular shell (503), the connecting pipe (505) is connected to the cavity of the sliding frame (404), and the cavities of the fixed telescopic rod (501), the guide pipe (502), the annular shell (503), the connecting pipe (505) and the sliding frame (404) are all filled with hydraulic oil.

7. A self-propelled drilling device for coal mines according to claim 5, characterized in that: Also includes: A fixing mechanism is arranged on the drill barrel (5) and is used to fix the rock core inside the drill barrel (5), the fixing mechanism comprising: A fixed cylinder (601) is rotatably connected to one end of the drill cylinder (5); a circumferentially distributed support plate (602) is slidably connected inside the fixed cylinder (601); a second spring is fixedly connected between the support plate (602) and the fixed cylinder (601); and the support plate (602) is used to fix the rock core moving into the fixed cylinder (601); A suspension detection component is arranged in the drill tube (5) and is used to detect whether the drill tube (5) has entered a crack.

8. A self-propelled drilling device for coal mines according to claim 7, characterized in that: The suspension detection component comprises: A plurality of arc-shaped slides (701) are slidably connected in the drill tube (5); a third spring is fixedly connected between the arc-shaped slides (701) and the drill tube (5); a slope is provided at the contact point of two adjacent arc-shaped slides (701); the arc-shaped slides (701) press the support plate (602) to move the support plate (602) into the fixed tube (601); A plurality of fixing plates (702) are respectively fixedly connected to the corresponding arc-shaped slide plates (701); the fixing plates (702) are slidably connected to the drill tube (5); a portion of the fixing plates (702) located outside the drill tube (5) is provided with a fixing block; the fixing block of the fixing plate (702) is provided with an inclined surface; and the fixing block of the fixing plate (702) is used to detect whether the drill tube (5) enters a crack.

9. A self-propelled drilling device for coal mines according to claim 8, characterized in that: The cross section of the arc-shaped slide plate (701) along the axis direction of the drill tube (5) is a right-angled trapezoid; a plurality of the arc-shaped slide plates (701) jointly squeeze the fixed tube (601) so that the fixed tube (601) is centered in the drill tube (5); and the support plate (602) only contacts the inclined surface of the arc-shaped slide plate (701).

10. A self-propelled drilling device for coal mines according to claim 9, characterized in that: The thickness of the fixing block of the fixing plate (702) is smaller than the thickness of the crushing teeth of the drill tube (5); the inclination direction of the inclined surface of the fixing block on the fixing plate (702) is opposite to the inclination direction of the adjacent crushing teeth on the drill tube (5), so as to prevent the fixing block of the fixing plate (702) from crushing the rock layer at the bottom of the drill hole.

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