Coal mine goaf working face drainage hole drilling device

Abstract

The invention relates to the technical field of drilling devices, and discloses a coal mine goaf working face drainage hole drilling device which comprises a base, and a plurality of supporting stand columns are fixedly arranged at the bottom of the base. When the device is used and used for drilling operation, the reaming function can be achieved through overturning of the drilling pieces, the supporting barrel can smoothly enter a hole, slurry, drilling slag and cooling water can be rapidly discharged through the flow guide grooves in the supporting barrel, and the situation that a drill bit is stuck due to too much drilling slag is avoided; according to the drilling tool, the phenomenon that the drilling tool and the supporting barrel are clamped in the drilling process can be avoided, in the drilling process, through the interaction of the clamping groove and the trapezoidal clamping block, the pointed-end inserting rod is inserted into the inner wall of the hole to fix the supporting barrel, the supporting barrel is left in the hole, the hole is effectively prevented from collapsing through supporting at different positions, and meanwhile the drilling tool is convenient to use. In the pulling-out process, friction between the drill rod and the supporting roller drives the cleaning roller brush to rotate, and the outer wall of the drill rod is cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of drilling devices, and more particularly to a drainage hole drilling device for a working face in a coal mine goaf. Background Art

[0002] Water drainage at the working face of a coal mine is an important measure taken to ensure safe production in the coal mine. Usually, holes are drilled at appropriate locations using a drilling device to guide the water to a special drainage system so that the water can flow out naturally or be discharged through pumping equipment. The drilling device usually uses a directional drilling technology through a directional device to accurately control the drilling trajectory, thereby reducing drilling time and energy consumption.

[0003] In the actual drilling process, since the drilling depth is sometimes deep, it is necessary to deepen the drilling depth continuously. However, during the drilling process and after the drilling is completed, due to the deep depth of the hole, if there is a lack of support for the hole, hole collapse accidents are very likely to occur, thereby endangering the lives of workers in the mine. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a drainage hole drilling device for a working face in a coal mine goaf to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a drainage hole drilling device for a working face in a coal mine goaf, comprising a base, a plurality of supporting columns fixedly arranged at the bottom of the base, an electric slide rail arranged on the top of the base through a lifting mechanism, a drilling mechanism arranged on the electric slide rail, the drilling mechanism comprising a motor seat, the motor seat being slidably arranged on the electric slide rail, a drilling motor being fixedly mounted on one side of the motor seat, an output shaft of the drilling motor passing through the motor seat and being threadedly connected to a drill rod, a supporting mechanism being clamped and mounted on a peripheral outer wall of the drill rod, a connecting rod being detachably mounted on the other end of the drill rod, a drill bit being fixedly mounted on one end of the connecting rod, a reaming mechanism being arranged on the connecting rod, a supporting ring being arranged on the top of the electric slide rail, and a supporting mechanism being arranged inside the supporting ring; The support mechanism includes a support tube, which is detachably mounted on the outer wall of the drill rod through a plurality of clamping assemblies. The clamping assembly includes a trapezoidal clamping block. A sliding groove is provided on the inner wall of the support tube. The trapezoidal clamping block is slidably arranged in the sliding groove. An avoidance groove is provided at one end of the drill rod. A clamping groove is provided on the outer wall of the drill rod. The avoidance groove is connected to the clamping groove. The bottom end of the trapezoidal clamping block extends into the clamping groove. A plurality of guide grooves are provided on the outer wall of the support tube. The plurality of guide grooves are all obliquely arranged. The reaming mechanism includes a plurality of drill bits, a T-shaped fixing ring is fixedly installed at the end of the drill rod, and the plurality of drill bits are movably arranged on the peripheral outer wall of the T-shaped fixing ring. The peripheral outer wall of the T-shaped fixing ring is provided with an angle adjustment component for driving the plurality of drill bits to flip synchronously; The support mechanism includes a support ring, which is fixedly installed on the top of the electric slide rail. A plurality of support rollers are movably provided on the inner wall of the peripheral side of the support ring. The plurality of support rollers are controlled by a visual monitoring component. A plurality of cleaning roller brushes are movably provided on the inner wall of the peripheral side of the support ring. The plurality of cleaning roller brushes are connected to the plurality of support rollers through a linkage unit. The linkage unit is used to drive the cleaning roller brushes and the support rollers to rotate synchronously.

[0006] Furthermore, the support mechanism also includes a pointed rod, a socket is provided on the side inner wall of the slide, the pointed rod is slidably installed in the socket, the end of the pointed rod is fixedly installed on the side of the trapezoidal block, and a clamping spring is provided on the peripheral outer wall of the pointed rod, one end of the clamping spring is fixedly installed on the side of the trapezoidal block, and the other end of the clamping spring is fixedly installed on the side inner wall of the slide.

[0007] Furthermore, the support mechanism also includes two plug-in blocks, rectangular grooves are provided on both sides of the trapezoidal block, and the side inner walls of the two rectangular grooves are fixedly installed with limit shafts, and the two plug-in blocks are respectively slidably installed on the two limit shafts, and the outer walls of the circumferences of the two limit shafts are sleeved with return springs, and the relative inner walls of the slide grooves are provided with two plug-in grooves, and the two plug-in grooves are respectively adapted to the two plug-in blocks.

[0008] Furthermore, the reaming mechanism also includes a plurality of U-shaped plates, and the plurality of U-shaped plates are fixedly mounted on the circumferential outer wall of the T-shaped fixing ring, and the relative inner walls of the plurality of U-shaped plates are fixedly mounted with fixed shafts, and the circumferential outer walls of the plurality of fixed shafts are rotatably mounted with short connecting rods, and the other ends of the plurality of short connecting rods are rotatably mounted on the circumferential inner walls of the plurality of drill bits, and the circumferential outer wall of the T-shaped fixing ring is provided with a plurality of movable grooves, and square sliders are slidably mounted in the plurality of movable grooves through movable components, and a long connecting rod is rotatably mounted on one side of the plurality of square sliders, and the other ends of the plurality of long connecting rods are rotatably mounted on the circumferential inner walls of the plurality of drill bits.

[0009] Furthermore, the moving assembly includes multiple screws, an annular cavity is opened in the T-shaped fixing ring, one end of the multiple screws are rotatably installed on the side inner walls of the multiple moving grooves, the other ends of the multiple screws are all penetrated into the annular cavity and rotatably installed on the side inner walls of the annular cavity, multiple square sliders are respectively threadedly installed on the multiple screws, the circumferential outer walls of the multiple screws are fixedly sleeved with gears, the circumferential inner wall of the annular cavity is rotatably installed with an annular rack, the annular rack is meshed with the multiple gears, a motor groove is opened on the side inner wall of the annular cavity, an adjusting motor is fixedly installed in the motor groove, and the output shaft of the adjusting motor is fixedly connected to the end of one of the screws.

[0010] Furthermore, the support mechanism also includes a plurality of electric telescopic rods, a plurality of circular grooves are opened on the inner wall of the circumference of the support ring, and the plurality of electric telescopic rods are respectively fixedly installed in the plurality of circular grooves, and the output ends of the plurality of electric telescopic rods are fixedly installed with connecting plates, and the two sides of the plurality of connecting plates are respectively fixedly installed with a first U-shaped block and a second U-shaped block, and the plurality of support rollers and the plurality of cleaning roller brushes are respectively rotatably installed in the plurality of first U-shaped blocks and the plurality of second U-shaped blocks, and the outer walls of the circumference of the plurality of support rollers are fixedly sleeved with friction washers.

[0011] Furthermore, the visual monitoring component includes two cameras, and arc-shaped plates are fixedly installed on both sides of the support ring. The two cameras are respectively fixedly installed on the bottom of the two arc-shaped plates. The two cameras are electrically connected to the multiple electric telescopic rods, and the outer wall of the drill rod is coated with a first prompt ring and a second prompt ring.

[0012] Furthermore, the linkage unit includes two mounting shafts, and a U-shaped cavity is provided in the first U-shaped block and the second U-shaped block, and a rotating hole is provided on the opposite inner walls of the two U-shaped cavities. The two mounting shafts are rotatably installed in the four rotating holes respectively, and the supporting roller and the cleaning roller brush are fixedly sleeved on the circumferential outer walls of the two mounting shafts respectively, and a linkage shaft and a transmission shaft are rotatably installed on the opposite inner walls of the two U-shaped cavities respectively, and the linkage shaft, the transmission shaft and the circumferential outer walls of the two mounting shafts are fixedly sleeved with drive sprockets, and two drive chains are meshed and installed on the four drive sprockets respectively, and the circumferential outer walls of the linkage shaft and the transmission shaft are fixedly sleeved with drive sprockets, and the two drive sprockets are meshed and installed with a transmission chain.

[0013] Furthermore, the lifting mechanism includes a hydraulic lift, which is fixedly installed on the top of the base. A lifting plate is fixedly provided at the output end of the hydraulic lift, and the electric slide rail is fixedly installed on the top of the lifting plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The height of the motor seat can be adjusted by the hydraulic lift, which can flexibly adjust the position of the equipment. The support tube can be conveniently installed at a specific position of the drill rod. The electric telescopic rod drives the support roller to support and limit the drill rod to prevent the drill rod angle from shifting. During the drilling process, the support tube can always provide effective support for the hole, improve the support effect, and prevent the borehole from collapsing.

[0015] 2. During drilling operations, the device can expand the hole by rotating the drill bit, allowing the support tube to enter the hole smoothly. The guide grooves on the support tube can quickly drain mud, cuttings, and cooling water, preventing the drill bit from getting stuck due to excessive cuttings. During the drilling process, the rotation of the drill bit can prevent the drill bit from getting stuck with the support tube. In addition, the use of an extension rod can extend the drilling depth, and by installing a support tube on the extension rod, the support effect can be achieved at different positions.

[0016] 3. During the drilling process, the interaction between the card slot and the trapezoidal card block allows the pointed rod to be inserted into the inner wall of the hole to fix the support tube, so that the support tube remains in the hole. By providing support at different positions, the hole collapse after drilling is effectively prevented, thereby improving the safety of coal mine operations. At the same time, during the drilling process, the friction between the drill rod and the support roller is used to drive the cleaning roller brush to rotate, cleaning the outer wall of the drill rod and reducing the impact of mud adhesion on the subsequent use of the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of this embodiment; Figure 2 Schematic diagram of the structural connection between the electric slide rail and the drill bit in this embodiment; Figure 3 This is a schematic diagram of a partial cross-section structure of the support ring in this embodiment; Figure 4 This is a schematic diagram of the partial cross-section structure of the connecting plate, the first U-shaped block, and the second U-shaped block in this embodiment; Figure 5 for Figure 4 A in the middle is an enlarged structural diagram; Figure 6 This is a schematic diagram of the partial cross-section structure of the support tube and drill rod in this embodiment; Figure 7 for Figure 6 The enlarged structural diagram at B in the middle; Figure 8 This is a schematic diagram of a partial cross-section structure of a trapezoidal block in this embodiment; Figure 9 Schematic diagram of the connection between the drill bit and the drill bit in this embodiment; Figure 10 This is a schematic diagram of a partial cross-section of the T-shaped fixing ring in this embodiment; Figure 11 for Figure 10 Enlarged structural diagram at point C in the middle.

[0018] The accompanying drawings are marked as follows: 1. base; 2. support column; 3. hydraulic lift; 4. lifting plate; 5. electric slide rail; 6. drilling motor; 7. motor seat; 8. drill rod; 9. support ring; 10. support tube; 11. drill bit; 12. camera; 13. first prompt ring; 14. guide groove; 15. electric telescopic rod; 16. connecting plate; 17. second prompt ring; 18. first U-shaped block; 19. support roller; 20. friction washer; 21. second U-shaped block; 22. cleaning roller brush; 23. linkage shaft; 24. transmission sprocket; 2 5. Transmission shaft; 26. Drive sprocket; 27. Drive chain; 28. Mounting shaft; 30. Transmission chain; 31. Trapezoidal block; 32. Plug-in slot; 33. Pointed plug rod; 34. Snap-in spring; 35. Slot; 36. Plug-in block; 37. Limiting shaft; 38. Return spring; 39. Connecting rod; 40. T-shaped fixing ring; 41. Long connecting rod; 42. Drill bit; 43. Screw; 44. Square slider; 45. Ring rack; 46. Gear; 47. Adjustment motor; 48. U-shaped plate; 49. Short connecting rod; 50. Fixed shaft. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation. The structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement solutions or common means, they will not be described in detail herein, but they still fall within the scope of protection of this application.

[0020] Figures 1-11 The best embodiment of the present invention is shown below in conjunction with the attached Figures 1-11 The present invention is further described.

[0021] The device for drilling drain holes on the working face of a coal mine goaf comprises a base 1, a plurality of supporting columns 2 are fixedly provided at the bottom of the base 1, an electric slide rail 5 is provided on the top of the base 1 through a lifting mechanism, a drilling mechanism is provided on the electric slide rail 5, and the drilling mechanism comprises a motor seat 7, the motor seat 7 is slidably provided on the electric slide rail 5, a drilling motor 6 is fixedly installed on one side of the motor seat 7, specifically, the drilling motor 6 is controlled by a PLC controller, the output shaft of the drilling motor 6 passes through the motor seat 7 and is threadedly connected to a drill rod 8, a support mechanism is clamped and installed on the outer wall of the peripheral side of the drill rod 8, the other end of the drill rod 8 is detachably provided with a connecting rod 39, and a drill bit 11 is fixedly installed on one end of the connecting rod 39. Specifically, the connection method between the drill rod 8 and the drilling motor 6 and the drill bit 11 is the existing technology, and its specific connection method will not be repeated here. A hole expanding mechanism is provided on the connecting rod 39, and a support ring 9 is provided on the top of the electric slide rail 5, and a support mechanism is provided inside the support ring 9; The support mechanism includes a support tube 10, which is detachably mounted on the outer wall of the drill rod 8 through a plurality of clamping assemblies. The clamping assembly includes a trapezoidal clamping block 31. A slide groove is provided on the inner wall of the outer wall of the support tube 10, and the trapezoidal clamping block 31 is slidably arranged in the slide groove. An avoidance groove is provided at one end of the drill rod 8, and a clamping groove 35 is provided on the outer wall of the outer wall of the drill rod 8. The avoidance groove is connected to the clamping groove 35. The bottom end of the trapezoidal clamping block 31 extends into the clamping groove 35. A plurality of guide grooves 14 are provided on the outer wall of the support tube 10, and the plurality of guide grooves 14 are all arranged obliquely. The reaming mechanism includes a plurality of drill bits 42. A T-shaped fixing ring 40 is fixedly mounted on the end of the drill rod 8. The plurality of drill bits 42 are movably mounted on the outer wall of the T-shaped fixing ring 40. The outer wall of the T-shaped fixing ring 40 is provided with an angle adjustment assembly for driving the plurality of drill bits 42 to flip synchronously. The support mechanism includes a support ring 9, which is fixedly installed on the top of the electric slide rail 5. A plurality of support rollers 19 are movably provided on the inner wall of the peripheral side of the support ring 9. The plurality of support rollers 19 are all controlled by a visual monitoring component. A plurality of cleaning roller brushes 22 are movably provided on the inner wall of the peripheral side of the support ring 9. The plurality of cleaning roller brushes 22 are connected to the plurality of support rollers 19 through a linkage unit. The linkage unit is used to drive the cleaning roller brushes 22 and the support rollers 19 to rotate synchronously.

[0022] like Figure 7 and Figure 8The cam 33 is fixed to the side of the trapezoidal block 31, and the other end of the cam 33 is fixed to the inner wall of the side of the chute. The two plug-in blocks 36 are provided with rectangular grooves on both sides of the trapezoidal block 31. The inner walls of the side parts of the two rectangular grooves are fixedly installed with limit shafts 37. The two plug-in blocks 36 are slidably installed on the two limit shafts 37 respectively. The outer walls of the circumferences of the two limit shafts 37 are sleeved with return springs 38. The opposite inner walls of the slide groove are provided with two plug-in grooves 32. The two plug-in grooves 32 are respectively adapted to the two plug-in blocks 36. Through the squeezing effect of the drill rod 8 on the trapezoidal block 31, when the trapezoidal block 31 moves to an appropriate position, the elastic action of the return spring 38 can drive the plug-in block 36 to move horizontally and be inserted into the plug-in groove 32, thereby realizing the plug-in effect, which has a fixing effect on the trapezoidal block 31, so that the pointed plug-in rod 33 can remain stable after being inserted into the inner wall of the hole.

[0023] like Figure 10As shown, the reaming mechanism also includes a plurality of U-shaped plates 48, and the plurality of U-shaped plates 48 are fixedly mounted on the outer wall of the circumference of the T-shaped fixing ring 40, and the relative inner walls of the plurality of U-shaped plates 48 are fixedly mounted with fixed shafts 50, and the outer walls of the circumference of the plurality of fixed shafts 50 are rotatably mounted with short connecting rods 49, and the other ends of the plurality of short connecting rods 49 are rotatably mounted on the inner wall of the circumference of the plurality of drill bits 42, and the outer wall of the circumference of the T-shaped fixing ring 40 is provided with a plurality of movable grooves. The plurality of movable grooves are slidably mounted with square sliders 44 through movable components, and the one side portions of the plurality of square sliders 44 are rotatably mounted with long connecting rods 41, and the other ends of the plurality of long connecting rods 41 are rotatably mounted on the inner wall of the circumference of the plurality of drill bits 42. Through the arrangement of the plurality of short connecting rods 49 and the plurality of long connecting rods 41, when the square slider 44 moves horizontally, the drill bit 42 can be squeezed on one end by the long connecting rod 41, so that the drill bit 42 is flipped, thereby adjusting its reaming diameter, facilitating the smooth entry of the support tube 10. In the hole, the moving assembly includes multiple screws 43, and an annular cavity is opened in the T-shaped fixing ring 40. One ends of the multiple screws 43 are rotatably installed on the side inner walls of the multiple moving grooves, and the other ends of the multiple screws 43 pass through the annular cavity and are rotatably installed on the side inner walls of the annular cavity. Multiple square sliders 44 are respectively threaded on the multiple screws 43, and the peripheral outer walls of the multiple screws 43 are fixedly sleeved with gears 46. The peripheral inner wall of the annular cavity is rotatably installed with an annular rack 45, and the annular rack 45 is meshed with multiple gears 46. A motor groove is opened on the side inner wall of the annular cavity, and an adjusting motor 47 is fixedly installed in the motor groove. Specifically, the adjusting motor 47 is controlled by a PLC controller, and the output shaft of the adjusting motor 47 is fixedly connected to the end of one of the screws 43. Through the setting of the annular rack 45, it can drive multiple gears 46 to rotate synchronously, thereby making multiple screws 43 rotate synchronously, which is convenient for synchronous adjustment of multiple drill bits 42.

[0024] like Figure 3 and Figure 4As shown, the support mechanism also includes a plurality of electric telescopic rods 15, a plurality of circular grooves are opened on the inner wall of the peripheral side of the support ring 9, and the plurality of electric telescopic rods 15 are respectively fixedly installed in the plurality of circular grooves, and the output ends of the plurality of electric telescopic rods 15 are fixedly installed with connecting plates 16, and a first U-shaped block 18 and a second U-shaped block 21 are respectively fixedly installed on both sides of the plurality of connecting plates 16, and a plurality of support rollers 19 and a plurality of cleaning roller brushes 22 are respectively rotatably installed in the plurality of first U-shaped blocks 18 and the plurality of second U-shaped blocks 21, and the peripheral outer walls of the plurality of support rollers 19 are fixedly sleeved with friction washers 20. Through the setting of the support rollers 19, the peripheral outer walls of the drill rod 8 can be squeezed and supported by the support rollers 19, thereby effectively avoiding the angle deviation phenomenon of the drill rod 8 during drilling. The visual monitoring component includes two cameras 12, specifically The camera 12 can adopt the camera in the displacement monitoring device based on machine vision disclosed in the Chinese patent with publication number CN220186286U in the prior art. Its specific working principle is not repeated here. Arc plates are fixedly installed on both sides of the support ring 9. Two cameras 12 are fixedly installed on the bottom of the two arc plates respectively. The two cameras 12 are electrically connected to multiple electric telescopic rods 15. The outer wall of the drill rod 8 is coated with a first prompt ring 13 and a second prompt ring 17. Through the arrangement of the camera 12 and the first prompt ring 13 and the second prompt ring 17, the position of the support tube 10 can be monitored by the camera 12, so that the position of the support roller 19 can be adjusted by the electric telescopic rod 15, so that it is always squeezed and supported with the drill rod 8 and the outer wall of the support tube 10, thereby improving the support effect.

[0025] like Figure 4 and Figure 5 As shown, the linkage unit includes two mounting shafts 28, a U-shaped cavity is opened in the first U-shaped block 18 and the second U-shaped block 21, and a rotation hole is opened in the opposite inner walls of the two U-shaped cavities. The two mounting shafts 28 are rotatably installed in the four rotation holes, and the support roller 19 and the cleaning roller brush 22 are fixedly sleeved on the outer walls of the circumference of the two mounting shafts 28. The relative inner walls of the two U-shaped cavities are rotatably installed with a linkage shaft 23 and a transmission shaft 25. The linkage shaft 23, the transmission shaft 25 and the outer walls of the circumference of the two mounting shafts 28 are fixedly sleeved with a driving sprocket 26. Two driving sprockets 26 are respectively engaged and installed on the four driving sprockets 26. The outer walls of the driving chain 27, the linkage shaft 23 and the transmission shaft 25 are all fixedly sleeved with a transmission sprocket 24, and the two transmission sprockets 24 are jointly meshed with a transmission chain 30. This arrangement can drive the support roller 19 to rotate when the drill rod 8 is pulled out of the drill hole through the squeezing effect of the support roller 19 and the drill rod 8, thereby driving the other installation shaft 28 to rotate synchronously through the meshing transmission effect of the four second driving sprockets 26, the two driving chains 27, the two transmission sprockets 24 and the transmission chain 30, so that the cleaning roller brush 22 cleans the outer wall of the drill rod 8 and removes the surface mud.

[0026] like Figure 1 As shown, the lifting mechanism includes a hydraulic lift 3, which is fixedly installed on the top of the base 1. A lifting plate 4 is fixedly provided at the output end of the hydraulic lift 3, and an electric slide 5 is fixedly installed on the top of the lifting plate 4. Through the setting of the hydraulic lift 3 and the electric slide 5, the motor seat 7 can be installed and adjusted. Specifically, the hydraulic lift 3 and the electric slide 5 are both existing technologies, and their specific installation methods and working principles are not repeated here.

[0027] The working principle and usage process of the present invention are as follows: when in use, the motor seat 7 is first adjusted to an appropriate height by the hydraulic lift 3, and the support tube 10 is slidably sleeved from one end of the avoidance groove to the outer wall of the peripheral side of the drill rod 8, and the support tube 10 is moved between the first prompt ring 13 and the second prompt ring 17, so that the multiple trapezoidal blocks 31 are respectively inserted into the multiple card slots 35, thereby realizing the installation of the support tube 10, and connecting one end of the drill rod 8 to the output shaft of the drilling motor 6, and the other end passes through the support ring 9 and is connected to the drill bit 11 through the connecting rod 39, and the multiple support rollers 19 are driven by multiple electric telescopic rods 15 to move synchronously toward the axis direction to realize the support and limiting function of the drill rod 8.

[0028] Start the drilling motor 6 to drive the drill rod 8 and the drill bit 11 to rotate, and drive the motor base 7 and the drill bit 11 to move horizontally through the electric slide rail 5 to realize the drilling function. During the movement, the drill rod 8 is supported by multiple support rollers 19 to effectively prevent the drill rod 8 from angular deviation, and the drill rod 8 can be monitored in real time through the camera 12. When the camera 12 detects the first prompt ring 13, it transmits an electrical signal to the multiple electric telescopic rods 15, so that the multiple electric telescopic rods 15 can respectively drive the multiple connecting plates 16 and the multiple support rollers 19 to move synchronously away from the axis according to the extrusion force, so that the support rollers 19 move along the inclined surface of the support tube 10, so that the drill rod 8 and the support tube 10 play a supporting role, thereby improving the supporting effect.

[0029] During the drilling process, the hole drilled by the drill bit 11 can be expanded through the action of multiple drill bits 42, so that the support tube 10 can enter the drill hole. When the support tube 10 rotates, the rotation of multiple guide grooves 14 arranged on the outer wall of the supporting tube 10 can quickly discharge the mud, drilling cuttings and cooling water generated during drilling, thereby avoiding the drill bit 11 from being stuck due to excessive internal drilling cuttings. When the drilling depth is deep, the drilling depth can be extended by installing a connecting rod. By arranging the support tube 10 on the outer wall of the connecting rod, the drilling hole can be supported at different positions to improve the support effect and prevent collapse caused by drilling.

[0030] When the drilling is completed, the adjusting motor 47 is started to drive one of the gears 46 and the screw 43 to rotate, so that the other gears 46 and the screw 43 are driven to rotate synchronously through the meshing action of the gear 46 and the annular rack 45, so that the multiple square sliders 44 move synchronously along the moving groove toward the drill bit 11 under the action of the thread. When the multiple square sliders 44 are moving, the multiple drill bits 42 are driven to flip synchronously toward the T-shaped fixing ring 40 through the connection action of the multiple long connecting rods 41, which effectively avoids the drill bit 42 and the support tube 10 from getting stuck when the drill rod 8 is contracted.

[0031] When the drill bit 11 is in the working state, the electric slide rail 5 drives the motor seat 7, the drill rod 8 and the drill bit 11 to move horizontally for a short distance synchronously. When the drill rod 8 moves horizontally, the trapezoidal block 31 is squeezed by the card slot 35, and the trapezoidal block 31 slides into the slide slot. When the trapezoidal block 31 moves, it can drive the pointed plug rod 33 to insert into the inner wall of the hole, thereby fixing the support tube 10. When the trapezoidal block 31 moves to a suitable position, the elastic action of multiple return springs 38 can drive multiple plug-in blocks 36 to be inserted into multiple plug-in slots 32 respectively, thereby limiting the trapezoidal block 31 and the pointed plug rod 33, thereby improving the fixing and limiting effect of the support tube 10. This arrangement can keep the support tube 10 in the hole, effectively preventing the lack of support for the hole after drilling, thereby causing the hole to collapse, and greatly improving the safety of working in the coal mine.

[0032] During the drilling process, the friction between the drill rod 8 and the support roller 19 can drive the support roller 19 and one of the mounting shafts 28 to rotate synchronously, thereby driving the other mounting shaft 28 to rotate synchronously through the meshing transmission of the four second drive sprockets 26, two drive chains 27, two transmission sprockets 24, and the transmission chain 30, so that the cleaning roller brush 22 rotates to simply clean the outer wall of the drill rod 8, thereby preventing mud and the like from sticking to the outside of the drill rod 8 and causing a certain impact on the subsequent use of the drill rod 8.

[0033] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A drainage hole drilling device for a working face in a coal mine goaf, comprising a base (1), characterized in that: A plurality of support columns (2) are fixedly arranged at the bottom of the base (1); an electric slide rail (5) is arranged at the top of the base (1) via a lifting mechanism; a drilling mechanism is arranged on the electric slide rail (5); the drilling mechanism comprises a motor seat (7); the motor seat (7) is slidably arranged on the electric slide rail (5); a drilling motor (6) is fixedly installed on one side of the motor seat (7); an output shaft of the drilling motor (6) passes through the motor seat (7) and is threadedly connected to a drill rod (8); a supporting mechanism is clamped and installed on the peripheral outer wall of the drill rod (8); a connecting rod (39) is detachably installed at the other end of the drill rod (8); a drill bit (11) is fixedly installed at one end of the connecting rod (39); a hole reaming mechanism is arranged on the connecting rod (39); a supporting ring (9) is arranged on the top of the electric slide rail (5); a supporting mechanism is arranged inside the supporting ring (9); The support mechanism comprises a support tube (10), the support tube (10) being detachably mounted on the peripheral outer wall of the drill rod (8) through a plurality of clamping assemblies, the clamping assembly comprising a trapezoidal clamping block (31), the peripheral inner wall of the support tube (10) being provided with a slide groove, the trapezoidal clamping block (31) being slidably arranged in the slide groove, an avoidance groove being arranged at one end of the drill rod (8), a clamping groove (35) being arranged on the peripheral outer wall of the drill rod (8), the avoidance groove being connected to the clamping groove (35), the bottom end of the trapezoidal clamping block (31) extending into the clamping groove (35), and a plurality of guide grooves (14) being arranged on the peripheral outer wall of the support tube (10), the plurality of guide grooves (14) being all arranged in an oblique shape; The hole-expanding mechanism comprises a plurality of drill bits (42); a T-shaped fixing ring (40) is fixedly mounted on the end of the drill rod (8); the plurality of drill bits (42) are movably arranged on the peripheral outer wall of the T-shaped fixing ring (40); and the peripheral outer wall of the T-shaped fixing ring (40) is provided with an angle adjustment component for driving the plurality of drill bits (42) to synchronously flip; The support mechanism comprises a support ring (9), wherein the support ring (9) is fixedly mounted on the top of the electric slide rail (5), a plurality of support rollers (19) are movably provided on the inner wall of the peripheral side of the support ring (9), and the plurality of support rollers (19) are all controlled by a visual monitoring component, and a plurality of cleaning roller brushes (22) are movably provided on the inner wall of the peripheral side of the support ring (9), and the plurality of cleaning roller brushes (22) are connected to the plurality of support rollers (19) via a linkage unit, and the linkage unit is used to drive the cleaning roller brushes (22) and the support rollers (19) to rotate synchronously.

2. The drainage hole drilling device for working face in coal mine goaf according to claim 1 is characterized by: The supporting mechanism further comprises a pointed plug rod (33), a plug hole is provided on the inner wall of the side of the slide slot, the pointed plug rod (33) is slidably mounted in the plug hole, the end of the pointed plug rod (33) is fixedly mounted on the side of the trapezoidal block (31), a clamping spring (34) is provided on the outer wall of the peripheral side of the pointed plug rod (33), one end of the clamping spring (34) is fixedly mounted on the side of the trapezoidal block (31), and the other end of the clamping spring (34) is fixedly mounted on the inner wall of the side of the slide slot.

3. The drainage hole drilling device for the working face of the coal mine goaf according to claim 2 is characterized by: The support mechanism further comprises two plug-in blocks (36), rectangular grooves are provided on both sides of the trapezoidal block (31), limiting shafts (37) are fixedly mounted on the side inner walls of the two rectangular grooves, the two plug-in blocks (36) are respectively slidably mounted on the two limiting shafts (37), the peripheral outer walls of the two limiting shafts (37) are sleeved with return springs (38), and two plug-in grooves (32) are provided on the opposite inner walls of the slide groove, and the two plug-in grooves (32) are respectively matched with the two plug-in blocks (36).

4. The drainage hole drilling device for working face in coal mine goaf according to claim 1 is characterized by: The reaming mechanism further comprises a plurality of U-shaped plates (48), wherein the plurality of U-shaped plates (48) are fixedly mounted on the peripheral outer wall of the T-shaped fixing ring (40), the opposite inner walls of the plurality of U-shaped plates (48) are fixedly mounted with fixed shafts (50), the peripheral outer walls of the plurality of fixed shafts (50) are rotatably mounted with short connecting rods (49), the other ends of the plurality of short connecting rods (49) are respectively rotatably mounted on the peripheral inner walls of the plurality of drill bits (42), the peripheral outer wall of the T-shaped fixing ring (40) is provided with a plurality of movable grooves, the plurality of movable grooves are slidably mounted with square sliders (44) via movable components, the side portions of the plurality of square sliders (44) are rotatably mounted with long connecting rods (41), the other ends of the plurality of long connecting rods (41) are respectively rotatably mounted on the peripheral inner walls of the plurality of drill bits (42).

5. The drainage hole drilling device for working face in coal mine goaf according to claim 4 is characterized by: The moving assembly comprises a plurality of screw rods (43), an annular cavity is provided in the T-shaped fixing ring (40), one end of the plurality of screw rods (43) is rotatably mounted on the side inner wall of the plurality of moving grooves, the other end of the plurality of screw rods (43) is penetrated into the annular cavity and is rotatably mounted on the side inner wall of the annular cavity, a plurality of square sliders (44) are respectively threadedly mounted on the plurality of screw rods (43), a gear (46) is fixedly sleeved on the peripheral outer wall of the plurality of screw rods (43), an annular rack (45) is rotatably mounted on the peripheral inner wall of the annular cavity, the annular rack (45) is meshedly mounted with the plurality of gears (46), a motor groove is provided on the side inner wall of the annular cavity, an adjusting motor (47) is fixedly mounted in the motor groove, and an output shaft of the adjusting motor (47) is fixedly connected to the end of one of the screw rods (43).

6. The drainage hole drilling device for working face in coal mine goaf according to claim 1 is characterized by: The support mechanism further comprises a plurality of electric telescopic rods (15), a plurality of circular grooves are formed on the inner wall of the peripheral side of the support ring (9), the plurality of electric telescopic rods (15) are respectively fixedly mounted in the plurality of circular grooves, the output ends of the plurality of electric telescopic rods (15) are all fixedly mounted with connecting plates (16), both sides of the plurality of connecting plates (16) are respectively fixedly mounted with first U-shaped blocks (18) and second U-shaped blocks (21), the plurality of support rollers (19) and the plurality of cleaning roller brushes (22) are respectively rotatably mounted in the plurality of first U-shaped blocks (18) and the plurality of second U-shaped blocks (21), and the outer walls of the peripheral sides of the plurality of support rollers (19) are all fixedly sleeved with friction washers (20).

7. The drainage hole drilling device for working face in coal mine goaf according to claim 6 is characterized by: The visual monitoring assembly comprises two cameras (12), arc plates are fixedly mounted on both sides of the support ring (9), the two cameras (12) are fixedly mounted on the bottoms of the two arc plates respectively, the two cameras (12) are electrically connected to the plurality of electric telescopic rods (15), and the outer wall of the peripheral side of the drill rod (8) is coated with a first prompt ring (13) and a second prompt ring (17).

8. The drainage hole drilling device for working face in coal mine goaf according to claim 6 is characterized by: The linkage unit comprises two installation shafts (28); the first U-shaped block (18) and the second U-shaped block (21) are each provided with a U-shaped cavity; the opposite inner walls of the two U-shaped cavities are each provided with a rotation hole; the two installation shafts (28) are rotatably installed in the four rotation holes; the support roller (19) and the cleaning roller brush (22) are respectively fixedly sleeved on the outer walls of the circumference of the two installation shafts (28); a linkage shaft (23) and a transmission shaft (25) are rotatably installed on the opposite inner walls of the two U-shaped cavities; the linkage shaft (23), the transmission shaft (25) and the outer walls of the circumference of the two installation shafts (28) are each fixedly sleeved with a driving sprocket (26); two driving chains (27) are respectively meshed and installed on the four driving sprockets (26); the outer walls of the circumference of the linkage shaft (23) and the transmission shaft (25) are each fixedly sleeved with a driving sprocket (24); a driving chain (30) is commonly meshed and installed on the two driving sprockets (24).

9. The drainage hole drilling device for working face in coal mine goaf according to claim 1, characterized in that: The lifting mechanism comprises a hydraulic lift (3), the hydraulic lift (3) being fixedly mounted on the top of the base (1), a lifting plate (4) being fixedly arranged at the output end of the hydraulic lift (3), and the electric slide rail (5) being fixedly mounted on the top of the lifting plate (4).

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