Drainage Hole Drilling Device for Working Face in Goaf of Coal Mine

Abstract

The present invention relates to the technical field of drilling devices, and discloses a drilling device for water drainage holes in the working face of a coal mine goaf, including a base, and a plurality of support columns are fixedly arranged at the bottom of the base. When in use, during the drilling operation of the device, the reaming function can be realized by the flipping of the drill bits, so that the support cylinder can smoothly enter the hole. The mud, drill cuttings and cooling water can be quickly discharged through the diversion grooves on the support cylinder, avoiding the drill bit being stuck due to excessive drill cuttings. And during the drill withdrawal, through the flipping of the drill bits, the phenomenon of being stuck with the support cylinder during the drill withdrawal can be avoided. During the drill withdrawal, through the interaction between the card slot and the trapezoidal block, the pointed insertion rod is inserted into the inner wall of the hole to fix the support cylinder, so that the support cylinder remains in the hole. By supporting at different positions, the collapse of the hole after drilling can be effectively prevented. At the same time, during the drill withdrawal, the rotation of the cleaning roller brush is driven by the friction between the drill pipe and the support roller to clean the outer wall of the drill pipe.

Description

Technical Field

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

[0002] In the construction of water drainage and dewatering in a coal mine working face, it is mainly an important measure taken to ensure the safe production of the coal mine. Usually, drilling is carried out through a drilling device at a suitable position to guide the water to a dedicated drainage system, so that the water can flow out naturally or be discharged through a pumping device. The drilling device usually realizes the directional drilling technology through a directional device, which can accurately control the drilling trajectory, thereby reducing the drilling time and energy consumption.

[0003] In the actual drilling process, sometimes the drilling depth is relatively deep, and it is necessary to continuously deepen the drilling depth. However, during and after the drilling process, due to the relatively deep hole depth, if the hole is lack of support, it is extremely easy to occur a hole collapse accident, thus endangering the lives of the mine workers. Summary of the Invention

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

[0005] The present invention provides the following technical solution: A drilling device for water drainage holes in the working face of a coal mine gob area, including a base. A plurality of support columns are fixedly arranged at the bottom of the base. An electric slide rail is arranged on the top of the base through a lifting mechanism. A drilling mechanism is arranged on the electric slide rail. The drilling mechanism includes a motor base, the motor base is slidably arranged on the electric slide rail. A drilling motor is fixedly installed on one side of the motor base. The output shaft of the drilling motor penetrates through the motor base and is threadedly connected with a drill pipe. A support mechanism is clamped and installed on the circumferential outer wall of the drill pipe. The other end of the drill pipe is detachably installed with a connecting rod. One end of the connecting rod is fixedly installed with a drill bit. An reaming mechanism is arranged on the connecting rod. A support ring is arranged on the top of the electric slide rail. A support mechanism is arranged inside the support ring;

[0006] The support mechanism includes a support cylinder, the support cylinder is detachably installed on the circumferential outer wall of the drill pipe through a plurality of clamping components. The clamping components include trapezoidal clamping blocks. A chute is opened on the circumferential inner wall of the support cylinder. The trapezoidal clamping blocks are slidably arranged in the chute. An avoidance groove is opened at one end of the drill pipe. A clamping groove is opened on the circumferential outer wall of the drill pipe. The avoidance groove is communicated with the clamping groove. The bottom end of the trapezoidal clamping block extends into the clamping groove. A plurality of diversion grooves are opened on the circumferential outer wall of the support cylinder. All the plurality of diversion grooves are obliquely arranged;

[0007] The reaming mechanism includes a plurality of drill bits. A T-shaped fixing ring is fixedly installed at the end of the drill pipe. A plurality of the drill bits are movably arranged on the outer wall of the circumference of the T-shaped fixing ring. An angle adjustment component for driving the plurality of drill bits to flip synchronously is arranged on the outer wall of the circumference of the T-shaped fixing ring.

[0008] The support mechanism includes a support ring. The support ring is fixedly installed on the top of the electric slide rail. A plurality of support rollers are movably arranged on the inner wall of the circumference of the support ring. A plurality of the support rollers are all controlled by a visual monitoring component. A plurality of cleaning roller brushes are movably arranged on the inner wall of the circumference of the support ring. A linkage unit is connected between each of the plurality of cleaning roller brushes and each of the plurality of support rollers. The linkage unit is used for driving the cleaning roller brushes and the support rollers to rotate synchronously.

[0009] Further, the support mechanism further includes a pointed plug rod. A jack is opened on the inner wall of the side part of the chute. The pointed plug rod is slidably installed in the jack. The end of the pointed plug rod is fixedly installed on the side part of the trapezoidal block. A clamping spring is arranged on the outer wall of the circumference of the pointed plug rod. One end of the clamping spring is fixedly installed on the side part of the trapezoidal block. The other end of the clamping spring is fixedly installed on the inner wall of the side part of the chute.

[0010] Further, the support mechanism further includes two plug-in blocks. Rectangular grooves are opened on both sides of the trapezoidal block. Limiting shafts are fixedly installed on the inner walls of the side parts of the two rectangular grooves. The two plug-in blocks are respectively slidably installed on the two limiting shafts. Return springs are sleeved on the outer walls of the circumferences of the two limiting shafts. Two plug-in grooves are opened on the opposite inner walls of the chute. The two plug-in grooves are respectively adapted to the two plug-in blocks.

[0011] Further, the reaming mechanism further includes a plurality of U-shaped plates. The plurality of U-shaped plates are all fixedly installed on the outer wall of the circumference of the T-shaped fixing ring. Fixed shafts are fixedly installed on the opposite inner walls of the plurality of U-shaped plates. Short connecting rods are rotatably installed on the outer walls of the circumferences of the plurality of fixed shafts. The other ends of the plurality of short connecting rods are respectively rotatably installed on the inner walls of the circumferences of the plurality of drill bits. A plurality of moving grooves are opened on the outer wall of the circumference of the T-shaped fixing ring. Square sliders are slidably installed in the plurality of moving grooves through moving components. Long connecting rods are rotatably installed on one side parts of the plurality of square sliders. The other ends of the plurality of long connecting rods are respectively rotatably installed on the inner walls of the circumferences of the plurality of drill bits.

[0012] Further, the moving component includes a plurality of screws. An annular cavity is formed in the T-shaped fixing ring. One ends of the plurality of screws are respectively rotatably installed on the inner walls of the sides of the plurality of moving grooves. The other ends of the plurality of screws all penetrate into the annular cavity and are rotatably installed on the inner wall of the side of the annular cavity. The plurality of square sliders are respectively threadedly installed on the plurality of screws. Gear rings are fixedly sleeved on the outer walls of the circumferences of the plurality of screws. An annular rack is rotatably installed on the inner wall of the circumference of the annular cavity. The annular rack is meshed and installed with the plurality of gear rings. A motor slot is formed in the inner wall of the side of the annular cavity. An adjusting motor is fixedly installed in the motor slot. The output shaft of the adjusting motor is fixedly connected to the end of one of the screws.

[0013] Further, the supporting mechanism further includes a plurality of electric telescopic rods. A plurality of circular grooves are formed in the inner wall of the circumference of the supporting ring. The plurality of electric telescopic rods are respectively fixedly installed in the plurality of circular grooves. The output ends of the plurality of electric telescopic rods are all fixedly installed with connecting plates. First U-shaped blocks and second U-shaped blocks are respectively fixedly installed on both sides of the plurality of connecting plates. The plurality of supporting 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. Friction washers are fixedly sleeved on the outer walls of the circumferences of the plurality of supporting rollers.

[0014] Further, the visual monitoring component includes two cameras. Arc-shaped plates are fixedly installed on both sides of the supporting ring. The two cameras are respectively fixedly installed at the bottoms of the two arc-shaped plates. The two cameras are both electrically connected to the plurality of electric telescopic rods. First warning rings and second warning rings are smeared on the outer wall of the circumference of the drill pipe.

[0015] Further, the linkage unit includes two mounting shafts. U-shaped cavities are formed in both the first U-shaped block and the second U-shaped block. Rotation holes are formed in the opposite inner walls of the two U-shaped cavities. The two mounting shafts are respectively rotatably installed in the four rotation holes. The supporting roller and the cleaning roller brush are respectively fixedly sleeved on the outer walls of the circumferences of the two mounting shafts. A linkage shaft and a transmission shaft are respectively rotatably installed on the opposite inner walls of the two U-shaped cavities. Driving sprockets are fixedly sleeved on the outer walls of the circumferences of the linkage shaft, the transmission shaft and the two mounting shafts. Two driving chains are respectively meshed and installed on the four driving sprockets. Transmission sprockets are fixedly sleeved on the outer walls of the circumferences of the linkage shaft and the transmission shaft. A transmission chain is jointly meshed and installed on the two transmission sprockets.

[0016] Further, the lifting mechanism includes a hydraulic lift. The hydraulic lift is fixedly installed on the top of the base. The output end of the hydraulic lift is fixedly provided with a lifting plate. The electric slide rail is fixedly installed on the top of the lifting plate.

[0017] The beneficial effects of the present invention compared with the prior art are as follows:

[0018] 1. By adjusting the height of the motor base through a hydraulic lift, the position of the equipment can be flexibly adjusted. The support cylinder can be conveniently installed at a specific position of the drill pipe. The electric telescopic rod is used to drive the support roller to support and limit the drill pipe, preventing the angle of the drill pipe from shifting. During the drilling process, the support cylinder can always effectively support the hole, improving the support effect and preventing the drilling hole from collapsing.

[0019] 2. When the device is drilling, the reaming function can be realized by flipping the drill bits, enabling the support cylinder to smoothly enter the hole. The diversion grooves on the support cylinder can quickly discharge the mud, drill cuttings and cooling water, avoiding the drill bit from being stuck due to excessive drill cuttings. During the drill withdrawal, by flipping the drill bits, the phenomenon of being stuck with the support cylinder during the drill withdrawal can be avoided. In addition, the use of extension rods can extend the drilling depth, and by setting support cylinders on the extension rods, the support effect can be achieved at different positions.

[0020] 3. During the drill withdrawal process, through the interaction between the card slot and the trapezoidal block, the pointed insertion rod is inserted into the inner wall of the hole to fix the support cylinder, so that the support cylinder remains in the hole. By providing support at different positions, the collapse of the hole after drilling can be effectively prevented, improving the safety of coal mine operations. At the same time, during the drill withdrawal process, the rotation of the cleaning roller brush is driven by the friction between the drill pipe and the support roller to clean the outer wall of the drill pipe, reducing the influence of mud adhesion on the subsequent use of the drill pipe. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of this embodiment;

[0022] Figure 2 It is a schematic structural connection diagram between the electric slide rail and the drill bit in this embodiment;

[0023] Figure 3 It is a schematic partial cross-sectional structure diagram of the support ring in this embodiment;

[0024] Figure 4 It is a schematic partial cross-sectional structure diagram of the connecting plate, the first U-shaped block and the second U-shaped block in this embodiment;

[0025] Figure 5 It is Figure 4 The enlarged structural diagram at A in

[0026] Figure 6 It is a schematic partial cross-sectional structure diagram of the support cylinder and the drill pipe in this embodiment;

[0027] Figure 7 It is Figure 6 The enlarged structural diagram at B in

[0028] Figure 8Schematic diagram of the partial cross-section structure of the trapezoidal clamping block in this embodiment;

[0029] Figure 9 Schematic diagram of the connection of part of the structure between the drill bit and the drill slice in this embodiment;

[0030] Figure 10 Schematic diagram of the partial cross-section structure of the T-shaped fixing ring in this embodiment;

[0031] Figure 11 is Figure 10 Schematic diagram of the enlarged structure at position C in

[0032] Reference numerals are: 1, base; 2, support column; 3, hydraulic lift; 4, lifting plate; 5, electric slide rail; 6, drilling motor; 7, motor base; 8, drill pipe; 9, support ring; 10, support cylinder; 11, drill bit; 12, camera; 13, first prompt ring; 14, diversion 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, driving sprocket; 25, transmission shaft; 26, driven sprocket; 27, drive chain; 28, mounting shaft; 30, transmission chain; 31, trapezoidal clamping block; 32, insertion slot; 33, pointed insertion rod; 34, clamping spring; 35, clamping groove; 36, insertion block; 37, limit shaft; 38, return spring; 39, connecting rod; 40, T-shaped fixing ring; 41, long connecting rod; 42, drill slice; 43, screw; 44, square slider; 45, annular rack; 46, gear; 47, adjustment motor; 48, U-shaped plate; 49, short connecting rod; 50, fixed shaft. Detailed implementation manners

[0033] The following further describes the present invention with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the drawings is for better explanation. The structure of the present invention necessarily goes beyond these limited embodiments, and for some equivalent replacement schemes or common means, no detailed description will be given herein, but they still fall within the protection scope of this application.

[0034] Figures 1 - 11 This is the best embodiment of the present invention. The following further describes the present invention with reference to the attached Figures 1 - 11 drawings.

[0035] Coal mine goaf working face water discharge hole drilling device, including a base 1, a plurality of support columns 2 are fixedly arranged at the bottom of the base 1, an electric slide rail 5 is arranged on the top of the base 1 through a lifting mechanism, a drilling mechanism is arranged on the electric slide rail 5, the drilling mechanism includes a motor base 7, the motor base 7 is slidably arranged on the electric slide rail 5, a drilling motor 6 is fixedly installed on one side of the motor base 7. Specifically, the drilling motor 6 is controlled by a PLC controller. The output shaft of the drilling motor 6 penetrates through the motor base 7 and is threadedly connected with a drill rod 8. A support mechanism is clamped and installed on the outer wall of the circumferential side of the drill rod 8. The other end of the drill rod 8 is detachably installed with a connecting rod 39. One end of the connecting rod 39 is fixedly installed with a drill bit 11. Specifically, the connection methods of the drill rod 8 with the drilling motor 6 and the drill bit 11 are prior arts, and their specific connection methods will not be elaborated here. An hole expanding mechanism is arranged on the connecting rod 39. A support ring 9 is arranged on the top of the electric slide rail 5, and a support mechanism is arranged inside the support ring 9;

[0036] The support mechanism includes a support cylinder 10. The support cylinder 10 is detachably installed on the outer wall of the circumferential side of the drill rod 8 through a plurality of clamping components. The clamping components include trapezoidal clamping blocks 31. A chute is opened on the inner wall of the circumferential side of the support cylinder 10. The trapezoidal clamping blocks 31 are slidably arranged in the chute. An avoidance groove is opened at one end of the drill rod 8, and a clamping groove 35 is opened on the outer wall of the circumferential side of the drill rod 8. The avoidance groove is communicated with the clamping groove 35. The bottom end of the trapezoidal clamping block 31 extends into the clamping groove 35. A plurality of diversion grooves 14 are opened on the outer wall of the circumferential side of the support cylinder 10, and all the plurality of diversion grooves 14 are obliquely arranged;

[0037] The hole expanding mechanism includes a plurality of drill bits 42. A T-shaped fixing ring 40 is fixedly installed at the end of the drill rod 8. The plurality of drill bits 42 are all movably arranged on the outer wall of the circumferential side of the T-shaped fixing ring 40. An angle adjusting component for driving the plurality of drill bits 42 to flip synchronously is arranged on the outer wall of the circumferential side of the T-shaped fixing ring 40;

[0038] The support mechanism includes a support ring 9. The support ring 9 is fixedly installed on the top of the electric slide rail 5. A plurality of support rollers 19 are movably arranged on the inner wall of the circumferential 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 arranged on the inner wall of the circumferential side of the support ring 9. The plurality of cleaning roller brushes 22 and the plurality of support rollers 19 are all connected through a linkage unit. The linkage unit is used to drive the cleaning roller brushes 22 and the support rollers 19 to rotate synchronously.

[0039] Such as Figure 7 and Figure 8As shown, the support mechanism further includes a pointed insertion rod 33. An insertion hole is formed in the inner wall of the side of the chute. The pointed insertion rod 33 is slidably installed in the insertion hole. The end of the pointed insertion rod 33 is fixedly installed on the side of the trapezoidal block 31. A clamping spring 34 is arranged on the outer wall of the circumference of the pointed insertion rod 33. One end of the clamping spring 34 is fixedly installed on the side of the trapezoidal block 31, and the other end of the clamping spring 34 is fixedly installed on the inner wall of the side of the chute. Through the arrangement of the pointed insertion rod 33, when the drill rod 8 moves horizontally, due to the frictional force between the support cylinder 10 and the inner wall of the circumference of the hole, the support cylinder 10 remains stationary. At this time, through the extrusion of the trapezoidal block 31 by the drill rod 8, the pointed insertion rod 33 is driven to insert into the inner wall of the circumference of the hole, thereby improving the fixed limit function of the support cylinder 10. The support mechanism further includes two insertion blocks 36. Rectangular grooves are formed on both sides of the trapezoidal block 31. The inner walls of the sides of the two rectangular grooves are both fixedly installed with limiting shafts 37. The two insertion blocks 36 are respectively slidably installed on the two limiting shafts 37. Return springs 38 are sleeved on the outer walls of the circumferences of the two limiting shafts 37. Two insertion slots 32 are formed in the opposite inner walls of the chute. The two insertion slots 32 are respectively adapted to the two insertion blocks 36. Through the extrusion of the trapezoidal block 31 by the drill rod 8, when the trapezoidal block 31 moves to a suitable position, it can drive the insertion block 36 to move horizontally and insert into the insertion slot 32 through the elastic action of the return spring 38, thereby realizing the insertion function and playing a fixing effect on the trapezoidal block 31, so that the pointed insertion rod 33 can remain stable after inserting into the inner wall of the hole.

[0040] As Figure 10As shown, the hole expanding mechanism further includes a plurality of U-shaped plates 48. The plurality of U-shaped plates 48 are all fixedly installed on the outer wall of the circumferential side of the T-shaped fixing ring 40. Fixed shafts 50 are fixedly installed on the opposite inner walls of the plurality of U-shaped plates 48. Short connecting rods 49 are rotatably installed on the outer walls of the circumferential sides of the plurality of fixed shafts 50. The other ends of the plurality of short connecting rods 49 are respectively rotatably installed on the inner walls of the circumferential sides of the plurality of drill bits 42. A plurality of moving grooves are formed in the outer wall of the circumferential side of the T-shaped fixing ring 40. Square sliders 44 are slidably installed in the plurality of moving grooves through moving components. Long connecting rods 41 are rotatably installed on one side of each of the plurality of square sliders 44. The other ends of the plurality of long connecting rods 41 are respectively rotatably installed on the inner walls of the circumferential sides 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 drill bit 42 moves horizontally with the square slider 44, the drill bit 42 can be flipped by the extrusion of the long connecting rod 41 at one end thereof, so as to adjust the hole expanding diameter thereof, facilitating the smooth entry of the support cylinder 10 into the hole. The moving component includes a plurality of screw rods 43. An annular cavity is formed in the T-shaped fixing ring 40. One ends of the plurality of screw rods 43 are respectively rotatably installed on the inner walls of the sides of the plurality of moving grooves. The other ends of the plurality of screw rods 43 all penetrate into the annular cavity and are rotatably installed on the inner wall of the side of the annular cavity. The plurality of square sliders 44 are respectively threadedly installed on the plurality of screw rods 43. Gear rings 46 are fixedly sleeved on the outer walls of the circumferential sides of the plurality of screw rods 43. An annular rack 45 is rotatably installed on the inner wall of the circumferential side of the annular cavity. The annular rack 45 is meshed and installed with the plurality of gear rings 46. A motor groove is formed in the inner wall of the side of the annular cavity. An adjusting motor 47 is fixedly installed in the motor groove. Specifically, the adjusting motor 47 is controlled by a PLC controller. The output shaft of the adjusting motor 47 is fixedly connected to the end of one of the screw rods 43. Through the arrangement of the annular rack 45, the plurality of gear rings 46 can be driven to rotate synchronously, so that the plurality of screw rods 43 rotate synchronously, facilitating the synchronous adjustment function of the plurality of drill bits 42.

[0041] As Figure 3 and Figure 4As shown in the figure, the support mechanism further includes a plurality of electric telescopic rods 15. Circular grooves are formed in the inner wall of the circumferential side of the support ring 9. The plurality of electric telescopic rods 15 are respectively fixedly installed in the plurality of circular grooves. Connecting plates 16 are fixedly installed at the output ends of the plurality of electric telescopic rods 15. First U-shaped blocks 18 and second U-shaped blocks 21 are respectively fixedly installed on both sides of the plurality of connecting plates 16. 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. Friction washers 20 are fixedly sleeved on the outer walls of the circumferential sides of the plurality of support rollers 19. Through the arrangement of the support rollers 19, the outer wall of the circumferential side of the drill pipe 8 can be extruded and supported by the support rollers 19, thus effectively avoiding the phenomenon of angular deviation of the drill pipe 8 during drilling. The visual monitoring assembly includes two cameras 12. Specifically, the cameras 12 can adopt the cameras in the displacement monitoring device based on machine vision disclosed in the Chinese patent with the publication number of CN220186286U in the prior art. The specific working principle thereof will not be elaborated herein. Arc-shaped plates are fixedly installed on both sides of the support ring 9. The two cameras 12 are respectively fixedly installed at the bottoms of the two arc-shaped plates. The two cameras 12 are both electrically connected to the plurality of electric telescopic rods 15. First prompt rings 13 and second prompt rings 17 are smeared on the outer wall of the circumferential side of the drill pipe 8. Through the arrangement of the cameras 12 and the first prompt rings 13 and the second prompt rings 17, the position of the support cylinder 10 can be monitored by the cameras 12, so as to adjust the positions of the support rollers 19 through the electric telescopic rods 15, facilitating their continuous extrusion and support on the outer walls of the circumferential sides of the drill pipe 8 and the support cylinder 10 and improving the support effect.

[0042] As Figure 4 and Figure 5 shown in the figure, the linkage unit includes two mounting shafts 28. U-shaped cavities are formed in both the first U-shaped block 18 and the second U-shaped block 21. Rotation holes are formed in the opposite inner walls of the two U-shaped cavities. The two mounting shafts 28 are respectively rotatably installed in the four rotation holes. The support rollers 19 and the cleaning roller brushes 22 are respectively fixedly sleeved on the outer walls of the circumferential sides of the two mounting shafts 28. A linkage shaft 23 and a transmission shaft 25 are respectively rotatably installed on the opposite inner walls of the two U-shaped cavities. Driving sprockets 26 are fixedly sleeved on the outer walls of the circumferential sides of the linkage shaft 23, the transmission shaft 25 and the two mounting shafts 28. Two drive chains 27 are respectively meshed and installed on the four driving sprockets 26. Transmission sprockets 24 are fixedly sleeved on the outer walls of the circumferential sides of the linkage shaft 23 and the transmission shaft 25. A transmission chain 30 is jointly meshed and installed on the two transmission sprockets 24. With such an arrangement, through the extrusion action between the support roller 19 and the drill pipe 8, when the drill pipe 8 is being lifted, the support roller 19 can be driven to rotate, and thus through the meshing and transmission actions of the four second driving sprockets 26, the two drive chains 27, the two transmission sprockets 24 and the transmission chain 30, the other mounting shaft 28 can be driven to rotate synchronously, so that the cleaning roller brush 22 can clean the outer wall of the circumferential side of the drill pipe 8 and remove the surface mud.

[0043] As shown Figure 1 in the figure, the lifting mechanism includes a hydraulic lift 3, which is fixedly installed on the top of the base 1. The output end of the hydraulic lift 3 is fixedly provided with a lifting plate 4. The electric slide rail 5 is fixedly installed on the top of the lifting plate 4. Through the settings of the hydraulic lift 3 and the electric slide rail 5, the motor base 7 can be installed and adjusted. Specifically, the hydraulic lift 3 and the electric slide rail 5 are both prior arts, and their specific installation methods and working principles will not be elaborated here.

[0044] The working principle and usage process of the present invention: When in use, first, the motor base 7 is adjusted to an appropriate height by the hydraulic lift 3. The support cylinder 10 is slidably sleeved on the outer wall of the drill rod 8 from one end of the avoidance groove, and the support cylinder 10 is moved between the first prompt ring 13 and the second prompt ring 17, so that a plurality of trapezoidal blocks 31 are respectively clamped into a plurality of card slots 35, thereby realizing the installation of the support cylinder 10. One end of the drill rod 8 is connected 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. A plurality of electric telescopic rods 15 drive a plurality of support rollers 19 to move synchronously towards the direction close to the axis, realizing the support and limiting function of the drill rod 8.

[0045] The drilling motor 6 is started to drive the drill rod 8 and the drill bit 11 to rotate, and the electric slide rail 5 drives the motor base 7 and the drill bit 11 to move horizontally to realize the drilling function. During the movement, the plurality of support rollers 19 play a supporting function for the drill rod 8, effectively preventing the drill rod 8 from deviating in angle. Moreover, the drill rod 8 can be monitored in real time through the camera 12. When the camera 12 monitors the first prompt ring 13, an electrical signal is transmitted to the plurality of electric telescopic rods 15, so that the plurality of electric telescopic rods 15 can drive the plurality of connecting plates 16 and the plurality of support rollers 19 to move synchronously away from the axis direction according to the extrusion force received, so that the support rollers 19 move along the inclined surface of the support cylinder 10, enabling the drill rod 8 and the support cylinder 10 to play a supporting role and improving the supporting effect.

[0046] During the drilling process, through the action of a plurality of drill bits 42, the hole drilled by the drill bit 11 can be reamed, so that the support cylinder 10 enters the drilled hole. When the support cylinder 10 rotates, through the rotational action of a plurality of diversion grooves 14 provided on its outer wall, the mud, drill cuttings and cooling water generated during drilling can be quickly discharged, avoiding the phenomenon that the drill bit 11 is stuck due to too much internal drill cuttings. When the drilling depth is relatively deep, the drilling depth can be extended by installing a connecting rod. By sleeving the support cylinder 10 on the outer wall of the connecting rod, the drilled hole can be supported at different positions to improve the supporting effect and prevent the collapse phenomenon caused by drilling.

[0047] After the drilling is completed, by starting the adjusting motor 47 to drive one of the gears 46 and the screw 43 to rotate, thereby driving the other gears 46 and the screw 43 to rotate synchronously through the meshing action of the gear 46 and the annular rack 45, so that a plurality of square sliders 44 move synchronously along the moving groove towards the drill bit 11 under the action of the thread. When the plurality of square sliders 44 are moving, through the connection action of a plurality of long connecting rods 41, a plurality of drill bits 42 are driven to flip synchronously towards the T-shaped fixing ring 40, effectively avoiding the phenomenon that the drill bits 42 are stuck with the support cylinder 10 when the drill pipe 8 contracts.

[0048] During the process of lifting the drill, first, the electric slide rail 5 drives the motor base 7, the drill pipe 8, and the drill bit 11 to move horizontally synchronously for a short distance. When the drill pipe 8 moves horizontally, through the extrusion action of the card slot 35 on the trapezoidal card block 31, the trapezoidal card block 31 can be made to slide into the chute. When the trapezoidal card block 31 is moving, it can drive the pointed plug rod 33 to insert into the inner wall of the hole, thereby playing a fixing role on the support cylinder 10. When the trapezoidal card block 31 moves to an appropriate position, through the elastic action of a plurality of return springs 38, a plurality of plug blocks 36 can be driven to insert into a plurality of plug slots 32 respectively, thereby limiting the trapezoidal card block 31 and the pointed plug rod 33, improving the fixing and limiting effect on the support cylinder 10. With such a setting, the support cylinder 10 can be left in the hole, effectively preventing the lack of support for the hole after drilling, thereby causing the phenomenon of hole collapse, and greatly improving the safety of working in the coal mine.

[0049] Moreover, during the process of lifting the drill, through the frictional action between the drill pipe 8 and the support roller 19, the support roller 19 and one of the mounting shafts 28 can be driven to rotate synchronously. Thus, through the meshing and transmission action of four second driving sprockets 26, two driving chains 27, two transmission sprockets 24, and the transmission chain 30, the other mounting shaft 28 is driven to rotate synchronously, so that the cleaning roller brush 22 rotates to simply clean the outer wall of the circumferential side of the drill pipe 8, preventing mud and the like from sticking to the outside of the drill pipe 8 and having a certain impact on the subsequent use of the drill pipe 8.

[0050] The above is only a preferred embodiment of the present invention, and it does not limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. Water discharge hole drilling device for working face in 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 on the top of the base (1) through a lifting mechanism. A drilling mechanism is arranged on the electric slide rail (5). The drilling mechanism includes a motor base (7). The motor base (7) is slidably arranged on the electric slide rail (5). A drilling motor (6) is fixedly installed on one side of the motor base (7). The output shaft of the drilling motor (6) penetrates through the motor base (7) and is threadedly connected with a drill rod (8). A support mechanism is clamped and installed on the outer wall of the circumferential side of the drill rod (8). The other end of the drill rod (8) is detachably installed with a connecting rod (39). A drill bit (11) is fixedly installed at one end of the connecting rod (39). A hole expanding mechanism is arranged on the connecting rod (39). A support ring (9) is arranged on the top of the electric slide rail (5). A support mechanism is arranged inside the support ring (9); The support mechanism includes a support cylinder (10). The support cylinder (10) is detachably installed on the outer wall of the circumferential side of the drill rod (8) through a plurality of clamping components. The clamping components include trapezoidal clamping blocks (31). A chute is opened on the inner wall of the circumferential side of the support cylinder (10). The trapezoidal clamping blocks (31) are slidably arranged in the chute. An avoidance groove is opened at one end of the drill rod (8). A clamping groove (35) is opened on the outer wall of the circumferential side of the drill rod (8). The avoidance groove is communicated with the clamping groove (35). The bottom end of the trapezoidal clamping block (31) extends into the clamping groove (35). A plurality of diversion grooves (14) are opened on the outer wall of the circumferential side of the support cylinder (10). The plurality of diversion grooves (14) are all obliquely arranged; The hole expanding mechanism includes a plurality of drill bits (42). A T-shaped fixing ring (40) is fixedly installed at the end of the drill rod (8). The plurality of drill bits (42) are all movably arranged on the outer wall of the circumferential side of the T-shaped fixing ring (40). An angle adjusting component for driving the plurality of drill bits (42) to flip synchronously is arranged on the outer wall of the circumferential side of the T-shaped fixing ring (40); The support mechanism includes a support ring (9). The support ring (9) is fixedly installed on the top of the electric slide rail (5). A plurality of support rollers (19) are movably arranged on the inner wall of the circumferential 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 arranged on the inner wall of the circumferential side of the support ring (9). A linkage unit is connected between the plurality of cleaning roller brushes (22) and the plurality of support rollers (19). The linkage unit is used for driving the cleaning roller brushes (22) and the support rollers (19) to rotate synchronously.

2. The water discharge hole drilling device for the goaf working face of a coal mine according to claim 1, wherein: The support mechanism further includes a pointed insertion rod (33). A jack is formed in the inner wall of the side of the chute. The pointed insertion rod (33) is slidably installed in the jack. The end of the pointed insertion rod (33) is fixedly installed on the side of the trapezoidal block (31). A clamping spring (34) is arranged on the outer wall of the circumferential side of the pointed insertion rod (33). One end of the clamping spring (34) is fixedly installed on the side of the trapezoidal block (31), and the other end of the clamping spring (34) is fixedly installed on the inner wall of the side of the chute.

3. The water discharge hole drilling device for the working face in the goaf of a coal mine according to claim 2, wherein: The support mechanism further includes two insertion blocks (36). Rectangular grooves are formed on both sides of the trapezoidal block (31). Limiting shafts (37) are fixedly installed on the inner walls of the sides of the two rectangular grooves. The two insertion blocks (36) are respectively slidably installed on the two limiting shafts (37). Return springs (38) are sleeved on the outer walls of the circumferential sides of the two limiting shafts (37). Two insertion slots (32) are formed on the opposite inner walls of the chute, and the two insertion slots (32) are respectively adapted to the two insertion blocks (36).

4. The water discharge hole drilling device for the working face in the goaf of a coal mine according to claim 1, characterized in that: The hole expanding mechanism further includes a plurality of U-shaped plates (48). The plurality of U-shaped plates (48) are all fixedly installed on the outer wall of the circumferential side of the T-shaped fixing ring (40). Fixed shafts (50) are fixedly installed on the opposite inner walls of the plurality of U-shaped plates (48). Short connecting rods (49) are rotatably installed on the outer walls of the circumferential sides of the plurality of fixed shafts (50). The other ends of the plurality of short connecting rods (49) are respectively rotatably installed on the inner walls of the circumferential sides of the plurality of drill bits (42). A plurality of moving grooves are formed on the outer wall of the circumferential side of the T-shaped fixing ring (40). Square sliders (44) are slidably installed in the plurality of moving grooves through moving components. Long connecting rods (41) are rotatably installed on one side of the plurality of square sliders (44). The other ends of the plurality of long connecting rods (41) are respectively rotatably installed on the inner walls of the circumferential sides of the plurality of drill bits (42).

5. The borehole drilling device for water drainage holes in the working face of a coal mine goaf according to claim 4, characterized in that: The moving component includes a plurality of screw rods (43). An annular cavity is formed in the T-shaped fixing ring (40). One ends of the plurality of screw rods (43) are respectively rotatably installed on the inner walls of the sides of the plurality of moving grooves. The other ends of the plurality of screw rods (43) all penetrate into the annular cavity and are rotatably installed on the inner wall of the side of the annular cavity. The plurality of square sliders (44) are respectively threadedly installed on the plurality of screw rods (43). Gears (46) are fixedly sleeved on the outer walls of the circumferential sides of the plurality of screw rods (43). An annular rack (45) is rotatably installed on the inner wall of the circumferential side of the annular cavity. The annular rack (45) is meshed with the plurality of gears (46). A motor slot is formed in the inner wall of the side of the annular cavity. An adjusting motor (47) is fixedly installed in the motor slot. The output shaft of the adjusting motor (47) is fixedly connected to the end of one of the screw rods (43).

6. The water discharge hole drilling device for the working face in the goaf of a coal mine according to claim 1, characterized in that: The support mechanism further includes a plurality of electric telescopic rods (15). A plurality of circular grooves are formed in the inner wall of the circumferential side of the support ring (9). The plurality of electric telescopic rods (15) are respectively fixedly installed in the plurality of circular grooves. The output ends of the plurality of electric telescopic rods (15) are all fixedly installed with connecting plates (16). First U-shaped blocks (18) and second U-shaped blocks (21) are respectively fixedly installed on both sides of the plurality of connecting plates (16). The plurality of support rollers (19) and the 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). Friction washers (20) are fixedly sleeved on the outer walls of the circumferential sides of the plurality of support rollers (19).

7. The borehole drilling device for water drainage holes in the working face of a coal mine goaf according to claim 6, characterized in that: The visual monitoring assembly includes two cameras (12). Arc-shaped plates are fixedly installed on both sides of the support ring (9). The two cameras (12) are respectively fixedly installed at the bottoms of the two arc-shaped plates. The two cameras (12) are both electrically connected to the plurality of electric telescopic rods (15). A first prompt ring (13) and a second prompt ring (17) are smeared on the outer wall of the circumferential side of the drill rod (8).

8. The borehole drilling device for water drainage holes in the working face of a coal mine goaf according to claim 6, wherein: The linkage unit includes two mounting shafts (28). U-shaped cavities are formed in both the first U-shaped block (18) and the second U-shaped block (21). Rotation holes are formed in the opposite inner walls of the two U-shaped cavities. The two mounting shafts (28) are respectively 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 circumferential sides of the two mounting shafts (28). A linkage shaft (23) and a transmission shaft (25) are respectively rotatably installed on the opposite inner walls of the two U-shaped cavities. Driving sprockets (26) are fixedly sleeved on the outer walls of the circumferential sides of the linkage shaft (23), the transmission shaft (25), and the two mounting shafts (28). Two drive chains (27) are respectively meshed and installed on the four driving sprockets (26). Transmission sprockets (24) are fixedly sleeved on the outer walls of the circumferential sides of the linkage shaft (23) and the transmission shaft (25). A transmission chain (30) is jointly meshed and installed on the two transmission sprockets (24).

9. The water drainage hole drilling device for the working face in the goaf of a coal mine according to claim 1, characterized in that: The lifting mechanism includes a hydraulic lift (3). The hydraulic lift (3) is fixedly installed on the top of the base (1). The output end of the hydraulic lift (3) is fixedly provided with a lifting plate (4). The electric slide rail (5) is fixedly installed on the top of the lifting plate (4).

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