CN117661998A

CN117661998A - Drilling device for coal mine

Info

Publication number: CN117661998A
Application number: CN202311838770.9A
Authority: CN
Inventors: 潘超; 曾现策; 刘阔; 刘瑭
Original assignee: Zaozhuang Gaosheng Industrial Co ltd
Current assignee: Zaozhuang Gaosheng Industrial Co ltd
Priority date: 2023-12-28
Filing date: 2023-12-28
Publication date: 2024-03-08

Abstract

The invention discloses a drilling device for a coal mine, and relates to the technical field of coal mine drilling. Including carrying the thing car, it is connected with first electronic carousel to carry the thing car rotation, first electronic carousel rigid coupling has first electronic slide rail, first electronic slide rail sliding connection has the sliding block, the sliding block rotates and is connected with the electronic carousel of second, the electronic carousel rigid coupling of second has the electronic slide rail of second, the electronic slide rail sliding connection of second has the plummer, plummer rigid coupling has the motor, the output shaft rigid coupling of motor has the rotating turret, the rotating turret rigid coupling has the elastic expansion link, the elastic expansion link rigid coupling has the driving pin, the electronic slide rail of second rotates and sliding connection has the drilling rod, the drilling rod rigid coupling has the drill bit, drilling rod splined connection has the main shaft. When the drill clamping condition occurs, the connection between the transmission pin and the main shaft is temporarily released by utilizing the telescopic characteristic of the elastic telescopic rod, so that the motor is protected.

Description

Drilling device for coal mine

Technical Field

The invention relates to the technical field of coal mine drilling and discloses a drilling device for a coal mine.

Background

In the coal mining process, drilling is usually carried out in the direction planned by engineers, the distribution state of concrete mineral deposits and terrains behind walls is confirmed, mining or tunneling is carried out after safety is ensured, a large amount of cooling water is usually injected into the drilling holes in the coal mining drilling process, the drill bit is cooled on one hand, dust and stone particles generated by the cooling water are flushed out of the drilling holes on the other hand, the impact effect of the cooling water on the stone particles is limited, when the stone particles or the dust are accumulated in the drilling holes in a large amount, the stone particles and the drill rod and the drill bit are rubbed with each other, so that the drill bit and the drill rod cannot be blocked by a blocking main body, a blocking phenomenon occurs, when the blocking of the drill bit occurs, the existing device cannot find the blocked main body in time, a motor continues to load to operate, and the drill bit and the drill rod are attempted to be continuously driven to rotate, so that the resistance of an output shaft of the motor is overlarge and is burnt out, and unnecessary economic loss is caused.

Disclosure of Invention

In order to overcome the defect that a motor is easy to burn when a drill is stuck, the technical scheme of the drilling device for the coal mine is provided.

The technical scheme of the invention is as follows: the utility model provides a drilling equipment for colliery, includes carries the thing car, it is connected with first electronic carousel to carry the thing car rotation, the upside rigid coupling of first electronic carousel has first electronic slide rail, first electronic slide rail has the sliding block through electronic slider sliding connection, the sliding block rotates and is connected with the second electronic carousel, the second electronic carousel has the second electronic slide rail through the support rigid coupling, the second electronic slide rail has the plummer through electronic slider sliding connection, the plummer rigid coupling has the motor, the output shaft rigid coupling of motor has the rotating turret, the rotating turret rigid coupling has circumference evenly distributed's elastic telescopic handle, the elastic telescopic handle rigid coupling has the driving pin, the second electronic slide rail is kept away from one side rotation and sliding connection of plummer have the drilling rod, be equipped with the water injection hole in the drilling rod, one side rigid coupling of plummer has the drill bit, the spline connection has the main shaft, circumference evenly distributed the driving pin all with the main shaft cooperation, the drilling rod is kept away from one side of plummer is equipped with the mechanism that blocks water, and is used for carrying out water when carrying out the fixed water layer to the underground water layer is used for the fixed water-blocking layer when auxiliary mechanism is used for the fixed back-flow.

As a further preferred mode, the bearing table is in sliding connection with a first sliding plate matched with the main shaft and a second sliding plate matched with the drill rod through a supporting rod, a pressure sensor is fixedly connected with the first sliding plate, a first elastic piece is fixedly connected between the pressure sensor and the second sliding plate, a first hydraulic push rod which is uniformly distributed is fixedly connected with the carrying vehicle, a second hydraulic push rod which is symmetrically distributed is fixedly connected with the first electric sliding rail, and the telescopic ends of the second hydraulic push rods which are symmetrically distributed are jointly connected with a rotating disc through fixed discs in a rotating mode.

As a further preferred mode, the water blocking mechanism comprises a moving ring, the moving ring is in sliding connection with the second electric sliding rail through an electric sliding block, a limit rod which is symmetrically distributed is fixedly connected to one side, far away from the bearing table, of the moving ring, the limit rods which are symmetrically distributed are all in sliding connection with the second electric sliding rail, a water blocking ring is jointly in sliding connection with the limit rods which are symmetrically distributed, the water blocking ring is in rotating connection with the drill rod, a baffle which is symmetrically distributed is fixedly connected between the baffle and the water blocking ring, a second elastic piece is fixedly connected between the baffle and the water blocking ring, a first hydraulic telescopic rod is fixedly connected to one side of the baffle, a telescopic end of the baffle is fixedly connected with the first hydraulic telescopic rod, a sliding plate is fixedly connected to the second hydraulic telescopic rod which is communicated with the first hydraulic telescopic rod, a third elastic piece is fixedly connected between a fixing part of the second hydraulic telescopic rod and a telescopic end of the second hydraulic telescopic rod, one side, far away from the sliding plate, of the water blocking ring is in sliding connection with a second elastic piece which is symmetrically distributed through a supporting rod, is fixedly connected with the fourth elastic piece, and the fourth elastic piece is fixedly connected to the fourth elastic piece is fixedly connected between the baffle and the fourth elastic piece.

As a further preference, the water blocking ring is matched with the baffle plates which are symmetrically distributed to form a circular ring, and the diameter of the circular ring is equal to the diameter of a drill bit on the drill rod.

As a further preference, the auxiliary fixing mechanism comprises a sliding ring, the sliding ring is in sliding connection with a support rod, the water blocking ring is close to one side of the sliding stop block, the water blocking ring is in sliding connection with a first extrusion block through the support rod, the first extrusion block is matched with the telescopic end of the second hydraulic telescopic rod, the sliding ring is positioned between the first extrusion block and the water blocking ring, a fifth elastic piece is fixedly connected between the first extrusion block and the sliding ring, a fixed toothed ring is fixedly connected with one side of the drill rod, which is close to the water blocking ring, a symmetrical fixing frame which is circumferentially distributed is fixedly connected with the fixed toothed ring, a drill cylinder is in spline connection with the fixing frame, the water blocking ring is in rotating connection with a symmetrical and circumferentially distributed first rotating ring through a support, the first rotating ring is in spline connection with an adjacent drill cylinder, a sixth elastic piece is fixedly connected between the first rotating ring and the first rotating ring, one side of the sliding ring, which is far away from the water blocking ring, is fixedly connected with a symmetrical and circumferentially distributed second extrusion block, and the second rotating ring is in rotating connection with the adjacent drill cylinder.

As a further preference, the fifth elastic member has an elastic force greater than that of the sixth elastic member.

As a further preference, the drill rod end socket is further provided with a supporting mechanism for supporting the drill rod end socket, the supporting mechanism is arranged on one side of the drill rod, which is far away from the bearing table, and comprises a limiting ring, the limiting ring is fixedly connected to one side of the symmetrically distributed limiting rod, which is far away from the movable ring, the drill rod is fixedly connected with a reducing cylinder on one side, which is close to the limiting ring, of the drill rod, a fixed block which is uniformly distributed in the circumferential direction is slidingly connected with the limiting ring, the fixed block is hinged with an extrusion head, the extrusion head is positioned on the inner side of the limiting ring, the extrusion head is matched with the reducing cylinder, and a seventh elastic piece is fixedly connected between the extrusion head and the adjacent fixed block.

As a further preferred, the drill rod locking device further comprises a reverse impact mechanism for assisting the drill rod to be separated from the stuck state, wherein the reverse impact mechanism is arranged on one side, close to the main shaft, of the drill rod, the reverse impact mechanism comprises a second rotating ring, the second rotating ring is connected with one side, far away from the motor, of the rotating frame through a supporting rod in a sliding mode, a fixed plate is fixedly connected to one side, close to the second rotating ring, of the drill rod, the fixed plate is connected with the second rotating ring in a rotating mode, one side, close to the second rotating ring, of the drill rod is connected with a rotating plate in a rotating mode, the rotating plate is connected with the second rotating ring in a rotating mode, first limiting pins which are uniformly distributed in the circumferential direction and are matched with the second rotating ring are all in damping mode, the first limiting pins are fixedly connected with the rotating plate through supporting rods, an eighth elastic piece is fixedly connected to the rotating plate, an impact ring matched with the drill rod is fixedly connected with the impact ring, a ninth elastic piece is fixedly connected to the impact ring, the first elastic piece is connected with the drill rod in a penetrating mode, the first limiting pin is uniformly distributed with the drill rod, and the steel wire rope locking device is fixedly connected with the steel wire rope locking device.

As a further preferred mode, the locking assembly comprises a water outlet pipe, the water outlet pipe is fixedly connected and communicated with one end, close to the second rotating ring, of the drill rod, a pressure valve is arranged in the water outlet pipe, a piston rod is connected in a sliding mode in the water outlet pipe, a tenth elastic piece is fixedly connected between the piston rod and the water outlet pipe, the piston rod penetrates through the water outlet pipe and is fixedly connected with an extrusion ring, the extrusion ring is rotationally connected with a third rotating ring, the third rotating ring is fixedly connected with second limiting pins which are uniformly distributed in the circumferential direction and are in sliding connection with the rotating plate, and the second limiting pins are matched with the adjacent first limiting pins.

As a further preference, the pressure valve defines a fluid pressure greater than the water pressure of the water injected into the drill pipe.

The beneficial effects are as follows: 1. when the drill clamping condition occurs, the connection between the transmission pin and the main shaft is temporarily released by utilizing the telescopic characteristic of the elastic telescopic rod, so that the motor is protected, and the overload of the motor is prevented from being burnt.

2. The pressure sensor is used for detecting the pressure of the first elastic piece, judging the pressure between the drill bit and the wall on the drill rod, dynamically adjusting the drilling speed of the drill rod, avoiding drill sticking caused by overlarge pressure between the drill bit and the wall on the drill rod, and avoiding the influence of the too slow drilling speed on the overall drilling progress.

3. According to the invention, the flowing speed of backwater is dynamically regulated by using the pressure of backwater, so that backwater after pressure accumulation can better drive dust and stone particles to move outside a drilled hole, meanwhile, the condition that backwater pressure is greatly increased is detected, whether a drill rod passes through an underground water layer is judged, a water blocking ring is matched with two baffles under the condition that the underground water layer is drilled, the underground water is blocked, a large amount of underground water is prevented from being blown out from the drilled hole, the safety in a coal mine tunnel is influenced, and time is striven for a user to explore the specific condition of the underground water layer.

4. The invention utilizes the drilling barrel to drill into the hole wall of the drilling hole when the underground water layer is drilled, fixes the drill rod, and prevents the underground water blowout from driving the drill rod and the water blocking ring to be ejected from the drilling hole, thereby generating accidents.

5. The four fixing blocks are matched with the inner wall of the drill hole, so that stable drilling of the end head of the drill rod is assisted, and the phenomenon that the drill hole deviates from the original position due to lack of fixing because the end head of the drill rod extends out of the second electric sliding rail for too long is avoided.

6. The invention uses the characteristic that the drill rod does not rotate when the drill is blocked, and the rotating frame continues to rotate along with the motor, pulls the ninth elastic piece to store force, so that the impact ring reversely impacts the drill rod, and uses a reverse impact method to separate stone particles which are blocked by the drill bit from the drill bit.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic perspective view of a first electric turntable, a first electric sliding rail and a sliding block according to the present invention;

FIG. 3 is a schematic perspective view of the bearing table, motor and turret of the present invention;

FIG. 4 is a schematic perspective view of the turret, drill pipe and spindle of the present invention;

FIG. 5 is a cross-sectional view of the drive pin, drill rod and main shaft of the present invention;

FIG. 6 is a schematic perspective view of the drill pipe, choke ring and reducing cylinder of the present invention;

FIG. 7 is a schematic perspective view of a baffle, a second elastic member and a first hydraulic telescoping rod according to the present invention;

FIG. 8 is a cross-sectional view of the water stop ring, slide plate and slide block of the present invention;

FIG. 9 is a cross-sectional view of the helical gear, drill barrel and first rotating ring of the present invention;

FIG. 10 is a mating state diagram of the helical gear, drill barrel and slip ring of the present invention;

FIG. 11 is a cross-sectional view of the drill pipe, stop collar and reducing barrel of the present invention;

FIG. 12 is a partial detail view of a fixed block, an extrusion head and a seventh elastomeric element of the present invention;

FIG. 13 is a schematic perspective view of a turret, a second rotating ring and a fixed plate according to the present invention;

FIG. 14 is a cross-sectional view of the drill rod, second swivel and swivel plate of the invention;

fig. 15 is a schematic perspective view of a rotating plate, an eighth elastic member and a wire rope according to the present invention.

Reference numerals: 101. the device comprises a carrying vehicle, 102, a first electric turntable, 103, a first electric slide rail, 104, a sliding block, 105, a second electric turntable, 106, a second electric slide rail, 107, a carrying plate, 108, a motor, 109, a rack, 110, an elastic telescopic rod, 111, a driving pin, 112, a drill rod, 113, a main shaft, 114, a first sliding plate, 115, a second sliding plate, 116, a pressure sensor, 117, a first elastic piece, 118, a first hydraulic push rod, 119, a second hydraulic push rod, 120, a rotating disc, 201, a moving ring, 202, a limit rod, 203, a water blocking ring, 204, a baffle plate, 2041, a second elastic piece, 205, a first hydraulic telescopic rod, 206, a sliding plate, 207, a second hydraulic telescopic rod, 208, a third elastic piece, 209 and a sliding block, 210, fourth elastic member, 301, sliding ring, 302, first extrusion block, 303, fifth elastic member, 304, fixed toothed ring, 305, fixed mount, 306, helical gear, 307, drill barrel, 308, first rotation ring, 309, sixth elastic member, 310, second extrusion block, 401, stopper ring, 402, diameter-changing barrel, 403, fixed block, 404, extrusion head, 405, seventh elastic member, 501, second rotation ring, 502, fixed plate, 503, rotation plate, 504, first stopper pin, 505, eighth elastic member, 506, strike ring, 507, ninth elastic member, 508, wire rope, 601, water outlet pipe, 602, piston rod, 603, tenth elastic member, 604, extrusion ring, 605, third rotation ring, 606, second stopper pin.

Detailed Description

It should be noted that in the various embodiments described, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the description can be transferred in a meaning to identical components having identical reference numerals or identical component names. In the description, selected positional references, such as the terms "upper", "lower", "left", "right", "inner", "outer", etc., refer also to the drawings as directly described and shown and are transferred in a meaning to a new position when the position is changed.

Example 1: 1-5, including carrying the thing car 101, carrying the upside of thing car 101 and rotating and being connected with the first electric turntable 102, carrying the upside of thing car 101 and fixedly connecting with the control panel, first electric turntable 102 and control panel electric connection, carry the front and back both sides of thing car 101 and fixedly connecting with four first hydraulic pushrods 118 of evenly distributed respectively, four first hydraulic pushrods 118 are used for propping up carrying the thing car 101 from the ground, first electric slide 103 with the electric connection of control panel is fixedly connected with the upside of first electric turntable 102, first electric slide 103 has sliding blocks 104 through electric slider sliding connection, the upside of first electric slide 103 fixedly connected with two second hydraulic pushrods 119 distributed symmetrically, the upside of two second hydraulic pushrods 119 telescopic ends is fixedly connected with the fixed disc jointly, the upside of fixed disc rotates and is connected with a rotary disc 120, when two second hydraulic pushrods 119 are elongated, the rotary disc 120 is contacted with mine roof, the first electric slide 103 can still rotate along with the first electric turntable 102, the front side of sliding block 104 is rotatably connected with the electric turntable 105 through electric slider, the second electric turntable 105 is connected with the second electric turntable 114 through the second electric slider carrier of electric turntable 114, the second electric turntable 115 is connected with the second electric turntable 114 through the second electric slider carrier of the second electric turntable 115, the second electric turntable is fixedly connected with the second electric turntable 117, the upper side of the fixed disc is connected with the second electric turntable, the electric turntable is connected with the second electric turntable 107 through the second electric turntable, the electric turntable is connected with the electric turntable 115, the electric turntable is connected with the electric turntable, the electric sensor is connected with the electric turntable 107 through the electric sensor, the electric turntable is connected with the electric turntable 115, the pressure sensor 116 detects the elastic force of the first elastic piece 117, so that the pressure between the drill bit and the left wall is obtained, a motor 108 electrically connected with the control console is fixedly connected to the upper side of the bearing table 107, four elastic telescopic rods 110 uniformly distributed in the circumferential direction are fixedly connected to the output shaft of the motor 108 through a rotating frame 109, transmission pins 111 are fixedly connected to the four elastic telescopic rods 110, a drill rod 112 is rotatably and slidably connected to the left side of the second electric sliding rail 106, a water injection hole (which is communicated with a water injection pump in the prior art) is formed in the drill rod 112, the drill bit is fixedly connected to the left side of the drill rod 112, a main shaft 113 is connected to the right side of the drill rod 112 in a spline manner, four grooves uniformly distributed in the circumferential direction are formed in the main shaft 113, inclined surfaces are formed in the transmission pins 111, the grooves of the main shaft 113 are matched with the inclined surfaces of the adjacent transmission pins 111, when the motor 108 drives the four transmission pins 111 to rotate, the main shaft 113 is driven by the inclined surfaces, a water blocking mechanism for adjusting the water pressure during backflow is arranged on the left side of the drill rod 112, and an auxiliary fixing mechanism for fixing the drill rod 112 when the drill bit is fixed to the underground.

Referring to fig. 1, 2 and 6-8, the water blocking mechanism includes a moving ring 201, the moving ring 201 is fixedly connected to an electric slider on the left side of the second electric sliding rail 106, two symmetrically distributed limiting rods 202 are fixedly connected on the left side of the moving ring 201, the two limiting rods 202 penetrate through the second electric sliding rail 106 and are slidably connected with the second electric sliding rail 106, a water blocking ring 203 is rotatably connected to the drill pipe 112, the two limiting rods 202 are slidably connected with the water blocking ring 203, two symmetrically distributed baffles 204 are slidably connected with the water blocking ring 203, a second elastic member 2041 is fixedly connected between the baffles 204 and the water blocking ring 203, the second elastic member 2041 is provided as a spring, a first hydraulic telescopic rod 205 is fixedly connected to the baffle 204 on the rear side, a sliding plate 206 is fixedly connected to the telescopic end of the first hydraulic telescopic rod 205, a second hydraulic telescopic rod 207 is fixedly connected to the sliding plate 206 on the left side of the water blocking ring 203, the second hydraulic telescopic rod 207 is communicated with the first hydraulic telescopic rod 205 through a hose, a third elastic piece 208 is fixedly connected between the fixed part of the second hydraulic telescopic rod 207 and the telescopic end of the fixed part, the third elastic piece 208 is a spring, when the water pressure is increased, the water extrudes the sliding plate 206 to drive the second hydraulic telescopic rod 207 to slide, the third elastic piece 208 compresses, hydraulic oil in the second hydraulic telescopic rod 207 flows into the first hydraulic telescopic rod 205, the first hydraulic telescopic rod 205 stretches, the two baffles 204 are opened back to increase the water flow area, the right side of the water blocking ring 203 is connected with symmetrically distributed sliding stop blocks 209 in a sliding manner through a supporting rod, the two sliding stop blocks 209 are matched with the telescopic end of the second hydraulic telescopic rod 207, when the water pressure is only from water injection, the two sliding stop blocks 209 stop the telescopic end of the second hydraulic telescopic rod 207 from moving rightwards, when the water pressure is from underground water, the third elastic piece 208 is fully compressed, the water drives the second hydraulic telescopic rod 207 to move rightwards through extruding the sliding plate 206, so that the telescopic ends of the second hydraulic telescopic rod 207 extrude the two sliding check blocks 209 to be away from each other, when the two sliding check blocks 209 lose the limit of the telescopic ends of the second hydraulic telescopic rod 207, the telescopic ends of the second hydraulic telescopic rod 207 reset under the reset action of the third elastic piece 208, the two baffle plates 204 are completely closed, the water blocking ring 203 and the two baffle plates 204 are matched to form a circular ring with the diameter of a drill bit on the drill rod 112, the underground water is blocked from being gushed outwards, a fourth elastic piece 210 is fixedly connected between the sliding check blocks 209 and the water blocking ring 203 through a bracket, the fourth elastic piece 210 is provided as a spring, the elastic force of the fourth elastic piece 210 is larger than that of the third elastic piece 208, the third elastic piece 208 compresses before the fourth elastic piece 210, a one-way valve is fixedly connected in the drill rod 112, and the underground water is prevented from being sprayed out reversely from a water injection hole in the drill rod 112.

Referring to fig. 6 and 8-10, the auxiliary fixing mechanism comprises a sliding ring 301, the sliding ring 301 is slidably connected to the right side of the water-blocking ring 203 through a supporting rod, the water-blocking ring 203 is slidably connected with a first extrusion block 302 matched with the telescopic end of the second hydraulic telescopic rod 207 through a supporting rod, the sliding ring 301 is positioned between the first extrusion block 302 and the water-blocking ring 203, two fifth elastic members 303 are fixedly connected between the first extrusion block 302 and the sliding ring 301, the fifth elastic members 303 are provided as tension springs, when the telescopic end of the second hydraulic telescopic rod 207 pushes the first extrusion block 302 to move, the first extrusion block 302 moves rightward, then the sliding ring 301 is pulled to move rightward through the two fifth elastic members 303, the left side of the drill rod 112 is fixedly connected with a fixed tooth ring 304, the water-blocking ring 203 is fixedly connected with two groups of fixing frames 305 distributed circumferentially, each group comprises two symmetrically distributed fixing frames 305, the fixing frames 305 are rotationally connected with bevel gears 306, the four bevel gears 306 are all meshed with the fixed toothed ring 304, the outer sides of the four bevel gears 306 are all in spline connection with the drilling drums 307, the water-blocking ring 203 is in rotary connection with first rotating rings 308 corresponding to the four drilling drums 307 one by one through a bracket, the first rotating rings 308 are in spline connection with adjacent drilling drums 307, sixth elastic pieces 309 are fixedly connected between the first rotating rings 308 and the adjacent drilling drums 307, the sixth elastic pieces 309 are springs and are used for keeping the drilling drums 307 from being contacted with the inner wall of a drill hole when the drilling drums 307 are not stressed, the right side of the sliding ring 301 is fixedly connected with four groups of second extrusion blocks 310 corresponding to the four drilling drums 307 one by one, each group comprises two second extrusion blocks 310 which are symmetrically distributed, when the two symmetrical second extrusion blocks 310 move rightwards along the sliding ring 301 and extrude the adjacent drilling drums 307, the adjacent drilling drums 307 gradually move outwards towards the water-blocking ring 203, and the fifth elastic pieces 303 are larger than the elastic pieces 309, the fifth elastic member 303 can thus be moved against the elastic force of the four sixth elastic members 309 by simultaneously pulling the four drilling cylinders 307 through the sliding ring 301.

The staff moves the device to the position that needs to bore holes through the operation panel at first, then the staff starts four first hydraulic push rods 118 and two second hydraulic push rods 119 through the operation panel simultaneously, the telescopic end of first hydraulic push rod 118 extrudes the ground downwards, the telescopic end of second hydraulic push rod 119 extrudes the mine roof upwards, fix the device, after the staff makes the device fixed, close four first hydraulic push rods 118 and two second hydraulic push rods 119 through the operation panel, make first electric turntable 102 rotate simultaneously, first electric turntable 102 rotates together through driving its upper part, at this moment, the telescopic end of two second hydraulic push rods 119 rotates through fixed disc and rotary disc 120 to be connected, therefore do not hinder first electric slide rail 103 and rotate after the device is fixed, make drilling rod 112 rotate to the position that aims at the wall of drilling hole, simultaneously through electric slide block drive its upper part of control console control first electric slide rail 103 slide, adjust the height of drilling rod 112, drive its upper part rotation through control console control second electric turntable 105, control 112 vertical direction get the angle, after whole adjustment of the staff passes through control console 108 and finishes after the whole adjustment of the motor.

The motor 108 rotates, the motor 108 rotates clockwise (taking left view as an example), the rotating frame 109 drives the four elastic telescopic rods 110 and the transmission pins 111 to rotate, the four transmission pins 111 drive the main shaft 113 to rotate together through the inclined surface, the main shaft 113 drives the drill rod 112 to rotate through the spline, the working personnel control the electric sliding block on the second electric sliding rail 106 to move through the control platform, the bearing platform 107 drives the drill rod 112 and parts thereon to move towards the wall surface together (limiting the wall surface to be drilled to the left side of the device, so that the bearing platform 107 drives the drill rod 112 to move leftwards), the control platform simultaneously controls the moving ring 201 to move leftwards, the moving speed of the moving ring 201 is the same as the moving speed of the bearing platform 107, when the drill rod 112 drives the drill bit to contact the wall surface, the drill bit starts to drill the wall surface, meanwhile, the drill bit is extruded by the wall surface, the drill bit 112 is further moved rightwards, the first elastic piece 117 is compressed by the compression force, the pressure sensor 116 calculates the pressure between the drill bit and the wall surface through detecting the elasticity of the first elastic piece 117, the control platform is used for transmitting data back to the control platform, the control platform is used for collecting data, the water injection pump starts to move inwards 112, when the pressure between the drill bit and the wall surface is slowed down, the pressure between the drill bit and the wall surface is increased by the electric sliding block 106 is prevented from moving leftwards through the electric sliding block 106, and the electric sliding block is prevented from moving leftwards, and the electric sliding block is increased by the electric sliding block 106 when the pressure is increased by the pressure between the electric sliding block is increased by the bearing platform and the bearing platform is increased.

When the drill rod 112 and the drill bit are stuck during the drilling process, the drill rod 112 cannot continue to rotate, the main shaft 113 cannot continue to rotate, at the moment, the four transmission pins 111 still rotate along with the rotating frame 109, the transmission pins 111 slide towards the outer side of the main shaft 113 through the inclination of the transmission pins themselves during the rotation process, the elastic telescopic rods 110 compress and store force until the transmission pins 111 are separated from the matching with the main shaft 113, the motor 108 is protected, the motor 108 is prevented from being damaged due to the fact that the motor 108 cannot continue to rotate during the emergency stop of the stuck drill, and after the operator finds that the drill rod 112 stops rotating, the motor 108 is turned off timely through the control console, and the drill rod 112 is rescued timely.

In the process that the drill rod 112 moves leftwards, the drill rod 112 drives the water blocking ring 203 and the upper parts thereof to move leftwards together, when the water blocking ring 203 and the upper parts thereof enter a borehole, because the two baffles 204 are in a closed state under the pushing of the adjacent second elastic pieces 2041 in the initial state, return water generated by water injection is accumulated on the left side of the water blocking ring 203, when the return water is higher than the sliding plate 206, the sliding plate 206 presses the sliding plate 206 to move rightwards under the action of pressure, the sliding plate 206 drives the fixing part of the second hydraulic telescopic rod 207 to move rightwards together, because the two sliding stop pieces 209 block the telescopic ends of the second hydraulic telescopic rod 207 to move rightwards, the telescopic ends of the second hydraulic telescopic rod 207 retract, the third elastic piece 208 compresses the accumulated force, meanwhile, the telescopic ends of the first hydraulic telescopic rod 205 are extruded in the second hydraulic telescopic rod 207 to move into the first hydraulic telescopic rod 205, the two baffles 204 are far away from each other, the two second elastic pieces 2041 compress the accumulated force, the return water is discharged rightwards from the openings of the two baffles 204 until the pressure and the elastic force of the two baffles 204 and the elastic force of the second elastic pieces are balanced and the two baffles 204 are opened mutually.

Because the backwater flows through the pressure accumulation, the backwater flow rate of the lower side of the choke ring 203 is increased, the backwater flow rate of the lower side of the choke ring 203 is driven to be increased, the backwater of the upper side of the choke ring 203 is blocked by the choke ring 203, the backwater flow rate of the upper side of the left side of the choke ring 203 is reduced, because the backwater flow rate of the left side of the choke ring 203 deviates, the backwater of the left side of the choke ring 203 is caused to generate turbulence, dust and stone particles generated in the process of drilling can be driven to move to the right side by the backwater better, when the backwater water pressure becomes larger, the retracting amount of the telescopic ends of the second hydraulic telescopic rods 207 is larger, the open holes between the two baffles 204 are larger, the excessive water pressure is prevented from penetrating into the inner walls of the holes, a large amount of collapse is caused at the inner walls of the holes, when the backwater water pressure is reduced, the telescopic ends of the second hydraulic telescopic rods 207 are stretched under the action of the reset of the third elastic pieces 208, the fixing parts of the sliding plates 206 and the second hydraulic telescopic rods 207 are stretched to the left, and the second hydraulic telescopic rods 207 are simultaneously, the backwaters can be driven to move to the left, so that dust and stone particles generated in the drilling process can be driven to move to the right through the adjacent second elastic pieces 204, the reset ends are driven to reduce the area of the dust and the open to the holes 204.

In the normal drilling process, the drill rod 112 always drives the fixed toothed ring 304 to rotate, so that four bevel gears 306 meshed with the fixed toothed ring 304 rotate, and the bevel gears 306 drive adjacent drilling drums 307 to rotate through splines, but all the four drilling drums 307 are not contacted with the inner wall of the drill hole.

When the underground water layer is drilled through in the drilling process, because the underground water layer is extruded by the terrain and is usually in a pressure accumulation state, underground water is blown into the drill hole from the joint of the drill hole and the underground water layer, so that the water pressure in the drill hole on the left side of the water blocking ring 203 suddenly rises, the water pressure pushes the sliding plate 206 to move rightwards, meanwhile, the third elastic piece 208 and the second elastic piece 2041 are compressed, when the third elastic piece 208 is compressed to the extreme, the water pressure continues to push the sliding plate 206 to move rightwards, the sliding plate 206 drives the second hydraulic telescopic rod 207 to move rightwards together, the telescopic ends of the second hydraulic telescopic rod 207 press the two sliding stop blocks 209, the two sliding stop blocks 209 slide back to each other and press the adjacent fourth elastic piece 210, and the fourth elastic piece 210 compresses the power accumulation, after the telescopic ends of the second hydraulic telescopic rods 207 are extruded and pass through the two sliding stop blocks 209, the two sliding stop blocks 209 lose the limit of the telescopic ends of the second hydraulic telescopic rods 207, the telescopic ends of the second hydraulic telescopic rods 207 return under the action of the third elastic pieces 208, meanwhile, the second hydraulic telescopic rods 207 absorb hydraulic oil from the first hydraulic telescopic rods 205, the two baffle plates 204 are driven by the first hydraulic telescopic rods 205 to approach and return, meanwhile, the second elastic pieces 2041 return, the water blocking ring 203 and the two baffle plates 204 are matched to form a closed circular ring, groundwater is prevented from being sprayed rightward, and meanwhile, because the check valves are installed in the drill rods 112, the groundwater cannot flow out from the drill rods 112 in a countercurrent mode.

When the telescopic end of the second hydraulic telescopic rod 207 moves rightwards and resets after passing through the two sliding stoppers 209, the telescopic end of the second hydraulic telescopic rod 207 extrudes the first extrusion block 302 to move synchronously, the two fifth elastic pieces 303 stretch and drive the sliding ring 301 to move rightwards together, the sliding ring 301 extrudes the adjacent drilling cylinders 307 respectively through the eight second extrusion blocks 310, so that the four drilling cylinders 307 move towards the inner wall of the drill hole together, the four sixth elastic pieces 309 compress, because the drilling cylinders 307 always rotate along with the bevel gears 306, the drilling cylinders 307 gradually drill into the inner wall of the drill hole in the moving process, after the four drilling cylinders 307 drill into the inner wall of the drill hole, the water blocking ring 203 and the drill hole form a relatively fixed state, the drill rod 112 is prevented from being forcibly impacted when underground water is blown out, the drill rod 112 is prevented from being forced to move towards the outer side of the drill hole, the drill rod 112 is blocked by the water ring 203 and cannot continue to drill leftwards due to mechanical damage or personnel injury, a worker knows that the drill rod 112 drills to an underground water layer by observing the change of the water return quantity of the outside of a drill hole, observing the phenomenon that the drill rod 112 cannot continue to drill, and the like, timely closes the motor 108 and the second electric sliding rail 106 through a control console, informs related responsible persons of timely surveying the underground water layer, and when judging safety, the first extrusion block 302 is reset by extending into the drill hole to extrude the long rod, the first extrusion block 302 moves leftwards and pushes the sliding ring 301 to move together, the sliding ring 301 drives the eight second extrusion blocks 310 to move leftwards to reset, the drill cylinder 307 loses the extrusion of the two adjacent second extrusion blocks 310, and is extruded by the adjacent sixth elastic piece 309 to move to the axis of the drill rod 112 to reset, the fixed state of the water blocking ring 203 and the inner wall of the drill hole is released, the operator then pulls out the drill pipe 112 and plugs the borehole in time.

After normal drilling operation is completed, the worker reversely operates the device to reset the device through the principle.

Example 2: based on embodiment 1, referring to fig. 1, fig. 6, fig. 11 and fig. 12, the drill rod 112 is further provided with a supporting mechanism disposed on the left side of the drill rod 112, the supporting mechanism is used for supporting the end of the drill rod 112, and preventing the drill hole from being gradually bent due to the overlong extension of the drill rod 112 and losing support, the supporting mechanism includes a limiting ring 401, the limiting ring 401 is fixedly connected on the left side of two limiting rods 202, a reducing cylinder 402 is fixedly connected on the left side of the drill rod 112, the reducing cylinder 402 is located on the inner side of the limiting ring 401, four fixing blocks 403 are slidably connected with the limiting ring 401, the four fixing blocks 403 are hinged with a pressing head 404, the four pressing heads 404 are located on the inner side of the limiting ring 401, when the pressing head 404 moves from left to right relative to the reducing cylinder 402, and the hinging position of the pressing head 404 and the adjacent fixing blocks 403 is located on the right side of the pressing head 404, so that the pressing head 404 cannot rotate relative to the adjacent fixing blocks 403, and the pressing head 403 can not rotate relative to the inner wall of the drill hole, when the pressing head 404 moves from right to left to the limiting ring 401, the pressing head 403 is fixedly connected with the inner wall of the drilling hole, and the pressing head 403 is fixedly connected with a torsion spring 405, and the pressing head 403 is fixedly connected with the second fixing block 405.

When the control console drives the movable ring 201 to move leftwards through the electric sliding blocks on the left side of the second electric sliding rail 106, the movable ring 201 drives the limiting ring 401 and parts thereon to move leftwards through the limiting rod 202, after the limiting ring 401 and parts thereon enter a drill hole, the control console stops moving the electric sliding blocks on the left side of the second electric sliding rail 106, the limiting ring 401 and the four fixing blocks 403 stop moving, the drill rod 112 still drives the reducing cylinder 402 to move leftwards, at the moment, relative displacement is generated between the limiting ring 401 and the reducing cylinder 402, the four fixing blocks 403 respectively drive the adjacent extrusion heads 404 to move along the outer radial direction of the reducing cylinder 402 and away from the circle center of the limiting ring 401, and in the process of moving the reducing cylinder 402 from right to left, by extruding the four extrusion heads 404, the extrusion heads 404 and the adjacent fixed blocks 403 move towards the direction of the inner wall of the drill hole, when the extrusion heads 404 are contacted with the largest diameter of the diameter-changing cylinder 402, the four fixed blocks 403 are contacted with the inner wall of the drill hole, and the drill rod 112 is always kept in the middle of the drill hole by the mutual extrusion of the four extrusion heads 404 and the diameter-changing cylinder 402, so that when the left part of the drill rod 112 extends out of the left side of the second electric sliding rail 106 for too long, the left part of the drill rod 112 is prevented from shaking due to lack of support, the drilling path is offset, the straightness of the drill hole is affected, friction between the water resistance ring 203 and the inner wall of the drill hole is reduced, and the rapid abrasion of the water resistance ring 203 is prevented.

In the process of moving the four extrusion heads 404 and the reducing cylinder 402 relatively, when the four extrusion heads 404 move to the right side of the reducing cylinder 402, the diameters of the reducing cylinder 402 on the right side are gradually reduced again, so that the four extrusion heads 404 and the four fixed blocks 403 gradually release the contact state with the inner wall of the drill hole, at this time, the control console drives the moving ring 201 to move left rapidly by controlling the electric sliding blocks on the second electric sliding rail 106, so that the moving ring 201 drives the four extrusion heads 404 and the four fixed blocks 403 to move left together, the four extrusion heads 404 move to the left side of the reducing cylinder 402 again, in the process of moving the four extrusion heads 404 to the left, after the extrusion heads 404 contact with the reducing cylinder 402, the extrusion heads are extruded to rotate, and the adjacent seventh elastic pieces 405 twist the storage force, meanwhile, because the extrusion heads 404 rotate, the fixed blocks 403 and the adjacent extrusion heads 404 cannot be extruded by the diameter-variable cylinder 402, so that the four fixed blocks 403 and the inner wall of the drill hole are mutually extruded, when the four extrusion heads 404 and the four fixed blocks 403 move to the left side of the diameter-variable cylinder 402, the seventh elastic piece 405 resets and drives the adjacent extrusion heads 404 to reset, the control console stops moving the movable ring 201 by stopping moving the electric slide blocks at the left side of the second electric slide rail 106, then repeats the process, and when the drill hole is completed, the staff controls the electric slide blocks at the left side and the right side of the second electric slide rail 106 to reset simultaneously, so that the movable ring 201 and the bearing table 107 drive parts on the movable ring 201 and the bearing table 107 to reset respectively.

Example 3: on the basis of embodiment 2, referring to fig. 1 and 13-15, the device further comprises a reverse impact mechanism arranged on the right side of the drill rod 112, the reverse impact mechanism is used for assisting the drill rod 112 to be separated from the stuck state, the reverse impact mechanism comprises a second rotating ring 501, the second rotating ring 501 is connected to the left side of the rotating frame 109 in a sliding manner through a supporting rod, a fixed plate 502 rotationally connected with the second rotating ring 501 is fixedly connected to the right side of the drill rod 112, a rotating plate 503 rotationally connected with the second rotating ring 501 is rotationally connected to the right side of the drill rod 112, two first limiting pins 504 which are uniformly distributed in the circumferential direction are rotationally connected to the right side of the rotating plate 503, grooves are formed in the second rotating ring 501, when the two first limiting pins 504 are inserted into adjacent grooves on the second rotating ring 501, the second rotating ring 501 drives the two first limiting pins 504 to rotate through the grooves, and damping exists at the sliding connection position of the first limiting pins 504 and the rotating plate 503, the first limiting pin 504 is prevented from being quickly reset after being disengaged from the rotating plate 503, the follow-up action is influenced, an eighth elastic piece 505 is fixedly connected between the first limiting pin 504 and the rotating plate 503 through a supporting plate, the eighth elastic piece 505 is provided with a spring, the drill rod 112 is slidably connected with an impact ring 506, the impact ring 506 is matched with the right end of the drill rod 112, a ninth elastic piece 507 is fixedly connected between the impact ring 506 and the drill rod 112, the ninth elastic piece 507 is provided with a spring, a steel wire rope 508 is fixedly connected between the first limiting pin 504 and the impact ring 506, the length of the steel wire rope 508 is in a loose state initially, when the two first limiting pins 504 rotate along with the second rotating ring 501, the two first limiting pins 504 pull the impact ring 506 to move leftwards through the steel wire ropes 508 adjacent to each other, the ninth elastic piece 507 stores force, after the two first limiting pins 504 are disengaged from the second rotating ring 501, the ninth elastic piece 507 drives the impact ring 506 to reset and impact the drill rod 112 rightward, the steel wire rope 508 pulls the two first limiting pins 504 to rotate and reset, the steel wire rope 508 penetrates through the fixing plate 502, and the drill rod 112 is provided with a locking component for locking the positions of the two first limiting pins 504.

Referring to fig. 13 and 14, the locking assembly includes a water outlet pipe 601, the water outlet pipe 601 is fixedly connected and communicated with the lower side of the right part of the drill rod 112, a pressure valve is arranged in the water outlet pipe 601, the liquid pressure limited by the pressure valve is greater than the water pressure of water injected into the drill rod 112, the water injected into the drill rod 112 can not flow out from the pressure valve of the water outlet pipe 601 under normal conditions, a piston rod 602 is transversely and slidingly connected in the water outlet pipe 601, a tenth elastic piece 603 is fixedly connected between the piston rod 602 and the water outlet pipe 601, the tenth elastic piece 603 is set as a spring, the piston rod 602 penetrates the water outlet pipe 601, an extrusion ring 604 is fixedly connected to the right side of the piston rod 602, a third rotating ring 605 is rotationally connected to the right side of the extrusion ring 604, two second limiting pins 606 are uniformly distributed circumferentially and slidingly connected with the rotating plate 503, inclined surfaces are arranged on the opposite sides of the two second limiting pins 606, the second limiting pins 606 are matched with adjacent first limiting pins 504 through the inclined surfaces, and after the first limiting pins 504 are extruded and pass through the adjacent second inclined surfaces of the second limiting pins 606, the two first limiting pins 504 are respectively limited by the adjacent limiting pins 606.

When the drill sticking occurs, the drill rod 112 drives the fixed plate 502 to stop rotating, but the rotating frame 109 continues to rotate along with the motor 108, at this time, the rotating frame 109 drives the second rotating ring 501 to rotate together through the supporting rod, the second rotating ring 501 drives the first limiting pins 504 to rotate together, the first limiting pins 504 drive the rotating plate 503 to rotate, in the process that the first limiting pins 504 pull the adjacent steel wire ropes 508 to rotate together, the steel wire ropes 508 gradually wind on the outer side of the drill rod 112 along the rotation direction of the steel wire ropes, the two steel wire ropes 508 pull the impact ring 506 to move leftwards together in the winding process, the ninth elastic piece 507 compresses the storage force, the steel wire ropes 508 gradually pull the adjacent first limiting pins 504 to move in the pulling process, and the two first limiting pins 504 slowly move towards the axis direction of the second rotating ring 501, and the adjacent eighth elastic piece 505 compresses the storage force.

When the first limiting pin 504 is separated from the second rotating ring 501, the first limiting pin 504 does not rotate along with the second rotating ring 501, and because damping exists between the first limiting pin 504 and the rotating plate 503, the first limiting pin 504 is blocked from moving and resetting rapidly, at the moment, the ninth elastic piece 507 pushes the impact ring 506 to reset, and in the process, the first limiting pin 504 cannot be matched with the second rotating ring 501 again, the impact ring 506 pulls the two first limiting pins 504 to rotate reversely through the two steel wire ropes 508, the two first limiting pins 504 drive the rotating plate 503 to rotate and reset, the impact ring 506 impacts the drill rod 112, so that the drill rod 112 is subjected to the force moving towards the outer side of the drill hole, then the first limiting pin 504 is gradually reinserted into the adjacent groove on the second rotating ring 501 under the action of the adjacent eighth elastic piece 505, if the drill rod 112 moves towards the outer side of the drill hole, the drill rod 112 is separated from stone grains of the blocked bit, the drill rod 112 is reset under the elastic action of the first elastic piece 117 after compressing the first elastic piece 117, when the impact ring 506 rotates to the position matched with the spindle 113, the two first limiting pins 504 pull the two first limiting pins 504 to rotate reversely, the rotating and reset, the two first limiting pins 504 drive the rotating plate 503 to rotate and reset, the impact ring 506 drives the drill rod 112 to rotate towards the outer side of the spindle 113, and the drill rod 112 is repeatedly rotates towards the outer side of the spindle 113, if the spindle 113 is repeatedly driven by the adjacent rotating ring 112, and the adjacent rotating ring 112 is not detected by the spindle 112, and the operator rotates the spindle 112 after the impact ring 112 is repeatedly, and the impact condition is detected.

After the drill stem 112 drills through the groundwater layer, because the groundwater layer water pressure is greater than the water injection water pressure, therefore, the water injection can not continue to flow leftwards through the check valve at the left side of the drill stem 112 after being injected into the drill stem 112, along with the increase of the water injection quantity, the water injection water pressure gradually increases in the drill stem 112, when the water injection water pressure is greater than the set pressure of the pressure valve in the water outlet pipe 601, the water injection gushes into the water outlet pipe 601, and pushes the piston rod 602 to move rightwards, the piston rod 602 compresses the tenth elastic piece 603, and drives the extrusion ring 604, the third rotating ring 605 and the two second limiting pins 606 to move rightwards together, the two second limiting pins 606 are inserted into the rotating plate 503, if the drilling rod 112 is blocked due to blowout of the groundwater at this time, the drill stem 112 is preferentially ensured not to move, therefore, when the first limiting pins 504 are pulled downwards by the wire ropes 508, the first limiting pins 504 are extruded leftwards by the second limiting pins 606, the piston rod 602 are reversely driven leftwards by the second limiting pins 606, and the piston rod 602 are driven leftwards by the second limiting pins 606 to move rightwards, the piston rod 602 are driven by the second limiting pins 602, the limiting rings 504 are driven to move rightwards, the first limiting pins 504 are driven by the piston rod 602, the impact rings 506 are driven by the second limiting pins, the impact rings 506 are not to be repeatedly carried out, and the impact the drill stem 112 is prevented from being repeatedly, and the impact on the drill stem 112 is prevented from being damaged by the drill stem 112 due to the impact, and the impact of the drill stem 112, the impact on the drill stem 112 is caused by the impact.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a drilling equipment for colliery, includes carries thing car (101), it is connected with first electronic carousel (102) to carry thing car (101) rotation, the upside rigid coupling of first electronic carousel (102) has first electronic slide rail (103), first electronic slide rail (103) have sliding block (104) through electronic slider sliding connection, sliding block (104) rotate and are connected with second electronic carousel (105), second electronic carousel (105) have second electronic slide rail (106) through the support rigid coupling, second electronic slide rail (106) have plummer (107) through electronic slider sliding connection, plummer (107) rigid coupling has motor (108), characterized in that still includes rotating turret (109), rotating turret (109) rigid coupling in the output shaft of motor (108), rotating turret (109) rigid coupling has elasticity telescopic link (110) of circumference evenly distributed, elasticity telescopic link (110) rigid coupling has driving pin (111), one side that second electronic slide rail (106) kept away from plummer (107) rotates and sliding connection has plummer (107), drilling rod (112) are equipped with water injection hole (112) are kept away from to drill rod (112), the transmission pins (111) which are uniformly distributed in the circumferential direction are matched with the main shaft (113), a water blocking mechanism is arranged on one side, away from the bearing table (107), of the drill rod (112), and an auxiliary fixing mechanism for auxiliary fixing of the drill rod (112) when the drill rod drills to an underground water layer is arranged, and the water blocking mechanism is used for adjusting water pressure during water injection backflow.

2. The drilling device for the coal mine according to claim 1, wherein the bearing table (107) is slidably connected with a first sliding plate (114) matched with the main shaft (113) and a second sliding plate (115) matched with the drill rod (112) through a supporting rod, a pressure sensor (116) is fixedly connected with the first sliding plate (114), a first elastic piece (117) is fixedly connected between the pressure sensor (116) and the second sliding plate (115), a first hydraulic pushing rod (118) which is uniformly distributed is fixedly connected with the carrying vehicle (101), a second hydraulic pushing rod (119) which is symmetrically distributed is fixedly connected with the first electric sliding rail (103), and telescopic ends of the second hydraulic pushing rods (119) which are symmetrically distributed are jointly connected with a rotating disc (120) through a fixed disc in a rotating mode.

3. The drilling device for coal mines according to claim 2, wherein the water blocking mechanism comprises a movable ring (201), the movable ring (201) is slidably connected to the second electric sliding rail (106) through an electric sliding block, a limit rod (202) symmetrically distributed is fixedly connected to one side of the movable ring (201) far away from the bearing table (107), the limit rods (202) symmetrically distributed are slidably connected to the second electric sliding rail (106), a water blocking ring (203) is slidably connected to the limit rods (202) symmetrically distributed, the water blocking ring (203) is rotatably connected to the drill rod (112), a baffle plate (204) symmetrically distributed is slidably connected to the water blocking ring (203), a second elastic member (2041) is fixedly connected between the baffle plate (204) and the water blocking ring (203), a first hydraulic telescopic rod (205) is fixedly connected to one side of the baffle plate (204), a telescopic end of the first hydraulic telescopic rod (205) is fixedly connected to the baffle plate (206), a second hydraulic telescopic rod (206) is fixedly connected to the sliding plate (208), a second hydraulic telescopic rod (207) is fixedly connected to the sliding plate (206), and a third hydraulic telescopic rod (207) is fixedly connected to the sliding plate (206), one side of the water blocking ring (203) far away from the sliding plate (206) is in sliding connection with sliding check blocks (209) which are symmetrically distributed and are matched with the telescopic ends of the second hydraulic telescopic rods (207), fourth elastic pieces (210) are fixedly connected between the sliding check blocks (209) and the water blocking ring (203), the elastic force of the fourth elastic pieces (210) is larger than that of the third elastic pieces (208), and one-way valves are fixedly connected in the drill rods (112).

4. A drilling device for coal mines according to claim 3, wherein the water-blocking ring (203) cooperates with the baffles (204) symmetrically distributed to form a circular ring, and the diameter of the circular ring is equal to the diameter of the drill bit on the drill rod (112).

5. The device for coal mine as claimed in claim 4, wherein the auxiliary fixing mechanism comprises a sliding ring (301), the sliding ring (301) is slidably connected to one side of the water-blocking ring (203) close to the sliding stopper (209) through a supporting rod, the water-blocking ring (203) is slidably connected with a first extrusion block (302) through a supporting rod, the first extrusion block (302) is matched with a telescopic end of the second hydraulic telescopic rod (207), the sliding ring (301) is located between the first extrusion block (302) and the water-blocking ring (203), a fifth elastic piece (303) is fixedly connected between the first extrusion block (302) and the sliding ring (301), a fixed tooth ring (304) is fixedly connected to one side of the drill rod (112) close to the water-blocking ring (203), a symmetrical and circumferentially distributed fixed frame (305) is fixedly connected to the water-blocking ring (203), a helical gear (306) meshed with the fixed tooth ring (304) is rotatably connected to the fixed tooth ring (305), a first rotating ring (307) is connected to the first rotating spline (307) and a circumferentially distributed spline (308) is fixedly connected to the first rotating ring (307), and a second extrusion block (310) which is symmetrical and circumferentially distributed is fixedly connected to one side of the sliding ring (301) away from the water blocking ring (203), and the second extrusion blocks (310) which are symmetrically distributed are matched with the adjacent drilling barrels (307).

6. A drilling device for coal mines according to claim 5, wherein the fifth elastic member (303) has an elastic force greater than that of the sixth elastic member (309).

7. A drilling device for coal mines according to claim 3, further comprising a supporting mechanism for supporting the end of the drill rod (112), wherein the supporting mechanism is arranged on one side, far away from the bearing table (107), of the drill rod (112), the supporting mechanism comprises a limiting ring (401), the limiting ring (401) is fixedly connected to one side, far away from the movable ring (201), of the limiting rod (202) which is symmetrically distributed, a diameter-variable cylinder (402) is fixedly connected to one side, close to the limiting ring (401), of the drill rod (112), fixing blocks (403) which are uniformly distributed in the circumferential direction are connected to the limiting ring (401) in a sliding mode, the fixing blocks (403) are hinged to extrusion heads (404), the extrusion heads (404) are located on the inner sides of the limiting ring (401), the extrusion heads (404) are matched with the diameter-variable cylinder (402), and seventh elastic pieces (405) are fixedly connected between the extrusion heads (404) and the adjacent fixing blocks (403).

8. The drilling device for coal mines according to claim 7, further comprising a reverse impact mechanism for assisting the drill rod (112) to be separated from the stuck state, wherein the reverse impact mechanism is arranged on one side of the drill rod (112) close to the main shaft (113), the reverse impact mechanism comprises a second rotating ring (501), the second rotating ring (501) is connected to one side of the rotating frame (109) far away from the motor (108) through a supporting rod in a sliding manner, a fixed plate (502) is fixedly connected to one side of the drill rod (112) close to the second rotating ring (501), the fixed plate (502) is connected with the second rotating ring (501) in a rotating manner, one side of the drill rod (112) close to the second rotating ring (501) is connected with a rotating plate (503) in a rotating manner, the rotating plate (503) is connected with first limit pins (504) which are uniformly distributed in the circumferential direction and are matched with the second rotating ring (501) in a sliding manner, the first limit pins (504) are fixedly connected with the first limit pins (506) through eight limit pins (506) which are matched with the first rotating plate (503) in a sliding manner, the novel steel wire drill is characterized in that a ninth elastic piece (507) is fixedly connected between the impact ring (506) and the drill rod (112), a steel wire rope (508) is fixedly connected between the first limiting pin (504) and the impact ring (506), the steel wire rope (508) penetrates through the fixed plate (502), and the drill rod (112) is provided with a locking assembly for locking the positions of the first limiting pins (504) which are uniformly distributed in the circumferential direction.

9. The drilling device for the coal mine according to claim 8, wherein the locking assembly comprises a water outlet pipe (601), the water outlet pipe (601) is fixedly connected and communicated with one end, close to the second rotating ring (501), of the drill rod (112), a pressure valve is arranged in the water outlet pipe (601), a piston rod (602) is slidably connected in the water outlet pipe (601), a tenth elastic piece (603) is fixedly connected between the piston rod (602) and the water outlet pipe (601), the piston rod (602) penetrates through the water outlet pipe (601) and is fixedly connected with an extrusion ring (604), the extrusion ring (604) is rotationally connected with a third rotating ring (605), the third rotating ring (605) is fixedly connected with second limiting pins (606) which are uniformly distributed in the circumferential direction and are all in sliding connection with the rotating plate (503), and the second limiting pins (606) are matched with the adjacent first limiting pins (504).

10. A drilling device for coal mines according to claim 9, wherein the pressure valve defines a liquid pressure which is greater than the water pressure of the water injected into the drill pipe (112).