Sealed coal mine underground directional drilling gas extraction device

Abstract

The invention discloses a sealing type coal mine underground directional drilling gas extraction device, and relates to the technical field of gas extraction, the sealing type coal mine underground directional drilling gas extraction device comprises a rack main body, a sealing mechanism is installed in the rack main body, and the sealing mechanism comprises connecting boxes fixedly installed on the two sides of an inner cavity of the rack main body; and threaded lead screws are longitudinally arranged in the two groups of connecting boxes. The outer barrel moves downwards, coal in a coal seam in a drill hole can enter a gap between the outer barrel and the drill rod, upward and outward thrust is exerted on the obliquely-arranged movable insertion plate, part of the coal is moved out of the drill hole from the upper surface of the movable insertion plate along the movable groove, and under the movement of the movable insertion plate, the coal seam in the drill hole can enter the gap between the outer barrel and the drill rod. And the removed coal is extruded and inserted into the coal layer on the inner wall of the drill hole again, extrusion and insertion of the removed coal are completed, the overall sealing performance of the device is improved, the sealing performance between the drill hole and the outer cylinder is increased once when the coal is extruded every time, and the sealing performance of the overall device is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas extraction, and in particular to a sealed coal mine underground directional drilling gas extraction device. Background Art

[0002] At present, the main means of coal mine gas extraction is to drill into coal seams and gas concentration areas, connect the boreholes to special pipelines, and use extraction equipment to extract the gas in coal seams and goafs to the ground for utilization, or discharge it into the main return air duct. Gas extraction is not only an important measure to reduce the amount of gas outburst during the mining process, prevent gas exceeding the limit and accumulation, and prevent gas explosions and coal and gas outburst accidents, but also can turn harm into treasure and develop and utilize gas as a resource associated with coal.

[0003] An existing patent (publication number: CN118481577B) discloses a coal mine underground directional drilling gas extraction device and method, which can control the downward movement speed of the spiral drill rod by controlling the moving speed of the guide layer, so that the drilling depth of the device can be adjusted according to demand. At the same time, the coal in the hole is used for sealing once, and the covering layer is used to seal the gas again, and then the frame is used to seal the gas three times, thereby improving the gas extraction effect.

[0004] However, the above technical solution still has certain defects. During the drilling stage, the above device needs an electric push rod to drive the support column to move up and down, and use the guide layer to drive the drill rod to rotate. The telescopic mechanism drives the drilling mechanism to move up and down repeatedly to increase the density of the coal seam in the borehole. This not only makes the drilling efficiency low, but also the process and time of achieving the sealing of the device are cumbersome. For this reason, a sealed coal mine underground directional drilling gas extraction device is proposed. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a sealed coal mine underground directional drilling gas extraction device to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sealed coal mine underground directional drilling gas extraction device, comprising a frame body, a sealing mechanism installed inside the frame body, the sealing mechanism comprising a connecting box fixedly installed on both sides of the inner cavity of the frame body, two groups of connecting boxes are longitudinally provided with threaded screws, the top ends of the two groups of threaded screws extend through and extend to the top of the frame body and are installed with a first motor, the output end of the first motor is fixedly connected to the threaded screw through a coupling, the outer walls of the two groups of threaded screws are threadedly connected with moving rods, the two groups of moving rods are relatively close to one end and fixedly connected with the same lifting plate, the bottom of the lifting plate is rotatably connected with an outer cylinder, a bearing is provided between the outer cylinder and the bottom of the lifting plate, the outer wall of the outer cylinder is provided with a plurality of groups of movable grooves equidistantly distributed from top to bottom, damping blocks are fixedly installed at both ends of the inner side of each group of movable grooves, and a movable plug plate is slidably connected between the two damping blocks inside each group of movable grooves, and a rotating component is provided above the lifting plate; The rotating assembly includes a second motor fixedly mounted on one side of the upper surface of the lifting plate, a first gear is fixedly connected to the output end of the second motor, a second gear is meshed with one side of the first gear, and the second gear is connected to the lifting plate through a connecting column, a drill rod is fixedly mounted on the bottom of the inner side of the outer cylinder, a certain gap is provided between the outer wall of the drill rod and the inner wall of the outer cylinder, the bottom end of the connecting column extends through to the bottom of the lifting plate and is fixedly connected to the top of the outer cylinder, a bearing is provided at the connection between the connecting column and the lifting plate, the inside of the drill rod is hollow, and the outer side of the hollow part is provided with a There is an annular movable chamber, in which a movable sleeve is slidably connected, and four groups of fixed rods distributed in a circle are fixedly installed on the outer wall of the movable sleeve, and one side of the four groups of fixed rods is installed with a plurality of rotating connecting rods equidistantly distributed from top to bottom, and each group of rotating connecting rods is rotatably connected to the fixed rod through a rotating shaft, and the other end of each group of rotating connecting rods is rotatably connected to a fixed block through a rotating shaft, and a push block is fixedly installed on the other side of each group of fixed blocks, and the outer wall of the drill pipe is provided with a plurality of receiving grooves matching the push blocks, and each push block is slidably connected to the corresponding receiving groove.

[0007] As a preferred technical solution of a sealed coal mine underground directional drilling gas extraction device of the present invention, the movable grooves opened on the outer wall of the outer cylinder are provided with four rows from top to bottom, and two adjacent rows of movable grooves are staggered, each group of the movable plug plates are inclined, and each group of the movable plug plates are arranged in a shape that is thick on the outside and thin on the inside, and each group of the movable plug plates are provided with sliding grooves matching the damping blocks on both sides, and transverse grooves are provided at the bottom of the inner cavity of the sliding groove and the bottom of the movable plug plate.

[0008] As an optimal technical solution for a sealed coal mine underground directional drilling gas extraction device of the present invention, a fixing ring is fixedly connected to the top of the movable casing, and L-shaped connecting rods are fixedly connected to both sides of the fixing ring. The other ends of the two groups of L-shaped connecting rods pass through the drill pipe and the outside of the outer tube and are fixedly installed with connecting sleeves. A moving ball is installed on the inside of the connecting sleeve. The bottom of the lifting plate is located on the outside of the outer tube and is fixedly connected to an annular connecting plate. A wave groove matching the moving ball is opened on the inner side of the annular connecting plate, and the moving ball is slidably connected to the wave groove.

[0009] As a preferred technical solution of a sealed coal mine underground directional drilling gas extraction device of the present invention, the upper ends of the outer walls of the outer cylinder and the drill rod are both provided with movable chambers matching the L-shaped connecting rod.

[0010] As an optimal technical solution for a sealed coal mine underground directional drilling gas extraction device of the present invention, the threaded screw is connected to the bottom of the inner cavity of the connecting box through a bearing, and two groups of connecting boxes are provided with sliding grooves matching the moving rod on opposite sides.

[0011] As an optimal technical solution of a sealed coal mine underground directional drilling gas extraction device of the present invention, a collecting component is provided in the drill rod, and the collecting component includes a plurality of through holes opened at the bottom of the drill rod, and an annular filter is fixedly installed at the bottom of the hollow area inside the drill rod, and a first gas concentration sensor is fixedly installed above the filter in the hollow area inside the drill rod, and through grooves connected to the hollow area inside the drill rod are opened on the top of the outer cylinder and in the connecting column, and a connecting pipe is connected to the through groove on the top of the connecting column, and the other end of the connecting pipe extends through to the top of the frame body and is fixedly connected to the first extraction pipe.

[0012] As a preferred technical solution of a sealed coal mine underground directional drilling gas extraction device of the present invention, the through hole at the bottom end of the drill rod is arranged in a trumpet shape with a large inner diameter and a small outer diameter, and each of the through holes is inclined.

[0013] As an optimal technical solution for a sealed coal mine underground directional drilling gas extraction device of the present invention, a second gas concentration sensor is fixedly installed on the rear side of the inner cavity of the frame body, a temperature sensor is installed on the rear side of the inner cavity of the frame body on one side of the second gas concentration sensor, and a second extraction pipe is fixedly connected to one side of the frame body.

[0014] As a preferred technical solution of a sealed coal mine underground directional drilling gas extraction device of the present invention, an observation window is installed on the front side of the frame body.

[0015] In summary, the present invention mainly has the following beneficial effects: 1. The present invention designs a sealing mechanism. With the downward movement of the outer cylinder, the coal in the coal seam in the borehole will enter the gap between the outer cylinder and the drill rod. With the entry of a large amount of coal, an upward and outward thrust is exerted on the inclined movable plug plate. Under the limitation of the damping block, the movable plug plate can only move outward along the movable groove. At the same time, a part of the coal passes through the gap between the movable plug plate and the drill rod and accumulates on the upper surface of the movable plug plate. A part of the coal is moved out of the borehole from the upper surface of the movable plug plate along the movable groove. Under the movement of the movable plug plate, the moved coal is squeezed and inserted into the coal seam on the inner wall of the borehole again, completing the squeezing and insertion of the moved coal, thereby improving the overall sealing of the device. By staggering two adjacent rows of movable grooves, the coal seam on the inner wall of the borehole is squeezed and inserted in all directions. Such movable grooves are provided in multiple groups from top to bottom. The movable plug plates of each layer are squeezed outward by the coal as the depth of descent increases. Each squeezing of the coal increases the sealing between the borehole and the outer cylinder, thereby further improving the sealing of the overall device.

[0016] 2. The present invention designs a rotating group, starts the second motor to drive the first gear to rotate, drives the second gear, the connecting column and the drill rod to rotate synchronously, and the movable sleeve inside the drill rod rotates accordingly, drives the fixed ring fixed on the top to rotate together, thereby drives the L-shaped connecting rod to rotate together, so that the movable ball slides in the wave groove in the annular connecting plate. Due to the limitation of the wave groove path, the movable sleeve and the fixed rod are driven to move up and down reciprocatingly. At this time, the rotating connecting rod moves up and down with the fixed rod, swings around the rotating shaft as the rotation center, and drives the fixed block and the push block at the other end to move back and forth in and out of the receiving groove, thereby repeatedly squeezing and compacting the coal in the receiving groove and the movable groove, increasing the density of the coal layer in the borehole, thereby improving its sealing performance; 3. Water containing water vapor is introduced into the first extraction pipe, which flows into the hollow area of ​​the drill pipe along the connecting pipe and finally flows out from the through hole. At this time, the water will combine with the coal seam in the borehole, making the coal seam in the borehole sticky, further improving the sealing performance between the borehole and the outer wall of the drill pipe, and preventing gas from overflowing from the gap between the borehole and the drill pipe. The seal between the borehole and the outer wall of the drill pipe is completed by the drill pipe during the drilling operation, which greatly improves the overall extraction efficiency of the device; and the overall weight of the drill pipe is increased by collecting the coal in the storage groove, ensuring that the drill pipe does not deviate when drilling, and enhancing the stability of the drill pipe drilling to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall front section structure of the present invention; Figure 3 It is a schematic diagram of the sealing mechanism structure of the present invention; Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle; Figure 5 It is a side cross-sectional view of a drill pipe of the present invention; Figure 6 It is a schematic diagram of the local internal structure of the drill rod of the present invention; Figure 7 It is a schematic diagram of the filter structure of the present invention; Figure 8 A bottom view of the lifting plate and the annular connecting plate of the present invention; Fig. 9 It is a schematic diagram of the external structure of the movable sleeve of the present invention; Fig.10 It is a schematic diagram of the internal structure of the annular connecting plate of the present invention; Fig.11 It is a schematic diagram of the bottom structure of the drill rod of the present invention.

[0018] In the figure: 100, frame body; 200, sealing mechanism; 300, rotating assembly; 400, collecting assembly; 110. Observation window; 210, connecting box; 220, threaded screw; 230, first motor; 240, moving rod; 250, lifting plate; 260, outer cylinder; 270, movable groove; 271, damping block; 280, moving plug plate; 281, sliding groove; 282, transverse groove; 310, second motor; 320, first gear; 321, second gear; 330, connecting column; 340, drill rod; 350, annular movable chamber; 360, movable sleeve; 370, fixed rod; 380, rotating connecting rod; 390, fixed block; 3910, push block; 3920, storage groove; 3930, fixed ring; 3940, L-shaped connecting rod; 3950, connecting sleeve; 3960, movable ball; 3970, annular connecting plate; 3980, wave groove; 410, through hole; 420, filter; 430, first gas concentration sensor; 440, connecting pipe; 450, first extraction pipe; 460, second gas concentration sensor; 470, second extraction pipe; 480, temperature sensor. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] The following describes an embodiment of the present invention based on its overall structure.

[0021] A sealed coal mine underground directional drilling gas extraction device, such as Figure 1-Figure 7 As shown, it includes a frame body 100, a sealing mechanism 200 is installed inside the frame body 100, and the sealing mechanism 200 includes a connection box 210 fixedly installed on both sides of the inner cavity of the frame body 100, and threaded screws 220 are longitudinally arranged in the two groups of connection boxes 210. The top ends of the two groups of threaded screws 220 extend through and extend above the frame body 100 and are installed with a first motor 230. The output end of the first motor 230 is fixedly connected to the threaded screw 220 through a coupling, and the outer walls of the two groups of threaded screws 220 are threadedly connected with a moving rod 240, and the threaded screw 220 is connected to the bottom of the inner cavity of the connection box 210 through a bearing. The two groups of connection boxes 210 are provided with a sliding groove matching the moving rod 240 on the opposite side, and the two groups of moving rods 240 are relatively close to one end. Fixedly connected with the same lifting plate 250, the bottom of the lifting plate 250 is rotatably connected with An outer cylinder 260 is provided with a bearing between the outer cylinder 260 and the bottom of the lifting plate 250. The outer wall of the outer cylinder 260 is provided with a plurality of groups of movable grooves 270 equidistantly distributed from top to bottom. Damping blocks 271 are fixedly installed at both ends of the inner side of each group of movable grooves 270, and a movable plug plate 280 is slidably connected between the two damping blocks 271 inside each group of movable grooves 270. A rotating assembly 300 is provided above the lifting plate 250. The movable grooves 270 provided on the outer wall of the outer cylinder 260 are provided with four rows from top to bottom, and two adjacent rows of movable grooves 270 are staggered. Each group of movable plug plates 280 are tilted, and each group of movable plug plates 280 are arranged in a shape that is thick outside and thin inside. Sliding grooves 281 matching the damping blocks 271 are provided on both sides of each group of movable plug plates 280, and transverse grooves 282 are provided at the bottom of the inner cavity of the sliding groove 281 and the bottom of the movable plug plate 280.

[0022] By starting the two sets of first motors 230, the output end of the first motor 230 drives the threaded screw 220 to rotate, thereby driving the moving rod 240 threadedly connected thereto to move downward, and then driving the lifting plate 250 to move downward. At this time, the lifting plate 250 will drive the outer cylinder 260 and the drill rod 340 to move toward the area to be drilled, and cooperate with the rotating component 300 to quickly drill the coal seam, and cooperate with the first motor 230 and the rotating component 300 to control the speed of the outer cylinder 260 and the drill rod 340 moving downward, so that the drilling depth of the device can be adjusted according to needs, and the opening on the opposite side of the connecting box 210 can be used to control the speed of the outer cylinder 260 and the drill rod 340 moving downward. The slide groove is designed to limit the upward and downward movement of the moving rod 240. As the outer cylinder 260 moves downward, the coal in the coal seam in the borehole will enter the gap between the outer cylinder 260 and the drill rod 340. As a large amount of coal enters, an upward and outward thrust is exerted on the inclined moving plug plate 280. Under the limitation of the damping block 271, the moving plug plate 280 can only move outward along the movable groove 270. At the same time, a part of the coal passes through the gap between the moving plug plate 280 and the drill rod 340 and accumulates on the upper surface of the moving plug plate 280. A part of the coal is discharged from the upper surface of the moving plug plate 280. The coal is moved out along the movable groove 270 into the borehole, and under the movement of the movable plug plate 280, the moved coal is squeezed and inserted into the coal layer on the inner wall of the borehole again, completing the squeezing and insertion of the moved coal, improving the overall sealing of the device, and the two adjacent rows of movable grooves 270 are staggered so that the coal layer on the inner wall of the borehole is squeezed and inserted in all directions. Such movable grooves 270 are provided in multiple groups from top to bottom, and the movable plug plates 280 of each layer are squeezed outward by the coal as the depth descends. Each squeezing of the coal will increase the sealing between the borehole and the outer cylinder 260, so that the sealing of the overall device is improved. For further improvement, the movable plug plate 280 is set to be thick on the outside and thin on the inside, which increases the outward thrust of the coal on the movable plug plate 280, thereby increasing the squeezing force of the movable plug plate 280 on the moved coal. At the same time, a transverse groove 282 is provided at the bottom of the movable plug plate 280 to further increase the friction between the coal and the movable plug plate 280, and further increase the squeezing force of the movable plug plate 280. At the same time, a transverse groove 282 is also provided at the bottom of the inner cavity of the sliding groove 281 to further increase the friction between the damping block 271 and the sliding groove 281, so that the movable plug plate 280 will not slide out of the movable groove 270 in the initial state.

[0023] Please refer to Figure 2-10As shown, the rotating assembly 300 includes a second motor 310 fixedly mounted on one side of the upper surface of the lifting plate 250, a first gear 320 is fixedly connected to the output end of the second motor 310, a second gear 321 is meshed with one side of the first gear 320, and the second gear 321 is connected to the lifting plate 250 through a connecting column 330, a drill rod 340 is fixedly mounted on the bottom of the inner side of the outer cylinder 260, a certain gap is provided between the outer wall of the drill rod 340 and the inner wall of the outer cylinder 260, and the bottom end of the connecting column 330 extends through the lifting plate 250 to the bottom of the outer cylinder 260. The bottom of the plate 250 is fixedly connected to the top of the outer cylinder 260, a bearing is provided at the connection between the connecting column 330 and the lifting plate 250, the inside of the drill rod 340 is set to be hollow, and an annular movable chamber 350 is opened on the outside of the hollow part, and a movable sleeve 360 ​​is slidably connected in the annular movable chamber 350, and four groups of fixed rods 370 distributed in a circumference are fixedly installed on the outer wall of the movable sleeve 360, and a plurality of groups of rotating connecting rods 380 distributed equidistantly from top to bottom are installed on one side of the four groups of fixed rods 370, and each group The rotating connecting rods 380 are rotatably connected to the fixed rods 370 through the rotating shafts. The other end of each set of rotating connecting rods 380 is rotatably connected to the fixed block 390 through the rotating shaft. A push block 3910 is fixedly installed on the other side of each set of fixed blocks 390. The outer wall of the drill rod 340 is provided with a plurality of receiving grooves 3920 matching the push blocks 3910, and each push block 3910 is slidably connected to the corresponding receiving groove 3920. A fixing ring 3930 is fixedly connected to the top of the movable sleeve 360, and both sides of the fixing ring 3930 are fixed. It is fixedly connected with an L-shaped connecting rod 3940, and the other ends of the two groups of L-shaped connecting rods 3940 pass through the drill pipe 340 and the outside of the outer cylinder 260 and are fixedly installed with a connecting sleeve 3950, and a moving ball 3960 is installed on the inside of the connecting sleeve 3950. The bottom of the lifting plate 250 is located on the outside of the outer cylinder 260 and is fixedly connected with an annular connecting plate 3970, and a wave groove 3980 matching the moving ball 3960 is opened on the inside of the annular connecting plate 3970, and the moving ball 3960 is slidably connected to the wave groove 3980.

[0024] As the outer cylinder 260 and the drill rod 340 move downward, the second motor 310 is started to drive the first gear 320 to rotate, thereby driving the second gear 321 meshing therewith to rotate, thereby driving the connecting column 330 fixed to the second gear 321 to rotate, and then driving the outer cylinder 260 and the drill rod 340 to rotate synchronously, and the storage groove 3920 connected to the outer movable groove 270 will collect another part of the coal on the upper surface of the movable plug plate 280 when the drill rod 340 descends and rotates. At the same time, the movable sleeve 360 ​​inside the drill rod 340 As it rotates, it drives the fixed ring 3930 fixed on the top to rotate together, thereby driving the L-shaped connecting rods 3940 fixedly connected on both sides of the fixed ring 3930 to rotate together, thereby driving the moving ball 3960 to slide in the wave groove 3980 in the annular connecting plate 3970. Since the path in the wave groove 3980 is in a high and low shape, the moving ball 3960 and the L-shaped connecting rod 3940 will also move back and forth in a high and low manner while rotating, thereby driving the fixed ring 3930 and the moving sleeve 360 ​​to move back and forth in a high and low manner. The movable sleeve 360 ​​moves up and down reciprocatingly, thereby driving the fixed rod 370 fixed on the outer wall of the movable sleeve 360 ​​to move up and down synchronously. At this time, several groups of rotating connecting rods 380 on the fixed rod 370 move up and down with the fixed rod 370, and swing around the rotating axis as the rotation center. When the rotating connecting rod 380 rotates toward the fixed rod 370, the fixed block 390 and the push block 3910 connected to the other end of the rotating connecting rod 380 are driven to move into the storage groove 3920. When the rotating connecting rod 380 rotates away from the fixed rod 370, the fixed block 39 0 and the push block 3910 move outward from the receiving groove 3920, so that during the descending and rotating process of the drill rod 340, the coal collected in the receiving groove 3920 is repeatedly squeezed and compacted outward, thereby further increasing the density of the coal layer in the borehole, and then the water containing water vapor is introduced through the first extraction pipe 450. At this time, the gas will combine with the coal layer in the borehole, making the coal layer in the borehole sticky, further improving the sealing of the borehole and the outer wall of the outer cylinder 260, and preventing gas from overflowing from the gap between the borehole and the outer cylinder 260.

[0025] Please refer to Figure 5 As shown, the upper ends of the outer walls of the outer cylinder 260 and the drill rod 340 are both provided with movable chambers matching the L-shaped connecting rod 3940 .

[0026] The movable chamber is opened to provide space for the L-shaped connecting rod 3940 to move up and down.

[0027] Please refer to Figure 2 , Figure 3As shown in Figure 11, a collection assembly 400 is provided in the drill rod 340, and the collection assembly 400 includes a plurality of through holes 410 opened at the bottom of the drill rod 340, and a ring-shaped filter screen 420 is fixedly installed at the bottom of the hollow area inside the drill rod 340, and a first gas concentration sensor 430 is fixedly installed above the filter screen 420 in the hollow area inside the drill rod 340, and a through groove connected to the hollow area inside the drill rod 340 is opened at the top of the outer cylinder 260 and the connecting column 330, and a connecting pipe is connected to the through groove at the top of the connecting column 330. 440, the other end of the connecting pipe 440 extends through and extends to the top of the frame body 100 and is fixedly connected to the first extraction pipe 450, the through hole 410 at the bottom end of the drill rod 340 is set to be a trumpet shape with a large inner diameter and a small outer diameter, and each through hole 410 is inclined. A second gas concentration sensor 460 is fixedly installed on the rear side of the inner cavity of the frame body 100, a temperature sensor 480 is installed on one side of the second gas concentration sensor 460 at the rear side of the inner cavity of the frame body 100, and a second extraction pipe 470 is fixedly connected to one side of the frame body 100.

[0028] The first gas concentration sensor 430 can detect the gas discharged from the inside of the drill rod 340 to determine the gas concentration. When the gas concentration is lower than 18%, the gas extraction is stopped. When the temperature sensor 480 detects that the temperature is higher than 450°C, the gas extraction is stopped and a reminder is given. When the gas concentration is greater than 30% and the temperature is lower than 300°C, the gas in the drill rod 340 is extracted. The gas enters the hollow area of ​​the drill rod 340 through the plurality of through holes 410 and then The connecting pipe 440 is entered through the through groove in the connecting column 330. It is worth noting that the connecting pipe 440 is configured as a corrugated pipe, which can automatically expand and contract with the up and down movement of the lifting plate 250. Then, the gas is extracted and collected using the first extraction pipe 450, and the filter net 420 can prevent the soil from flowing into the interior of the drill rod 340 through the through hole 410. The second gas concentration sensor 460 detects the gas concentration in the frame body 100. When the gas concentration is greater than 3%, the gas in the frame body 100 is discharged through the second extraction pipe 470.

[0029] Please refer to Figure 1 As shown, an observation window 110 is installed on the front side of the rack body 100 .

[0030] After digging a hole on the coal seam, the staff connects the sealing ring to the bottom of the frame body 100, and then uses screws to connect the frame body 100 and the coal seam. The number of screws is adjusted according to the brittleness difference of the coal seam to complete the installation of the device. Since the observation window 110 is transparent, outsiders can observe the interior of the device through the observation window 110.

[0031] When in use, the first motor 230 is started to drive the lifting plate 250 to move downward. At this time, the lifting plate 250 will drive the outer cylinder 260 and the drill rod 340 to move toward the area to be drilled, and cooperate with the rotating component 300 to quickly drill the coal seam, and cooperate with the first motor 230 and the rotating component 300 to control the downward movement speed of the outer cylinder 260 and the drill rod 340, so that the drilling depth of the device can be adjusted according to needs, and the sliding groove opened on the opposite side of the connecting box 210 is used to limit the up and down movement of the moving rod 240. As the outer cylinder 260 moves downward, the coal in the coal seam in the borehole will enter the gap between the outer cylinder 260 and the drill rod 340. With the entry of a large amount of coal, an upward and outward thrust is exerted on the inclined moving plug plate 280. Under the limitation of the damping block 271, the moving plug plate 280 can only It can move outward along the movable groove 270, and at the same time, part of the coal passes through the gap between the movable plug plate 280 and the drill rod 340 and accumulates on the upper surface of the movable plug plate 280. Part of the coal is moved out from the upper surface of the movable plug plate 280 along the movable groove 270 into the borehole, and under the movement of the movable plug plate 280, the moved coal is squeezed and inserted into the coal layer on the inner wall of the borehole again, completing the squeezing and insertion of the moved coal, improving the overall sealing of the device, and through the staggered arrangement of two adjacent rows of movable grooves 270, the coal layer on the inner wall of the borehole is squeezed and inserted in all directions. Such movable grooves 270 are provided with multiple groups from top to bottom, and the movable plug plates 280 of each layer are squeezed outward by the coal as the depth descends. Each squeezing of the coal will increase the sealing between the borehole and the outer cylinder 260, so that the sealing of the overall device is further improved;As the outer cylinder 260 and the drill rod 340 move downward, the second motor 310 is started to drive the first gear 320 to rotate, thereby driving the second gear 321 meshing therewith to rotate, thereby driving the connecting column 330 fixed to the second gear 321 to rotate, and then driving the outer cylinder 260 and the drill rod 340 to rotate synchronously, and the storage groove 3920 connected to the outer movable groove 270 will collect another part of the coal on the upper surface of the movable plug plate 280 when the drill rod 340 descends and rotates. At the same time, the inside of the drill rod 340 The movable sleeve 360 ​​rotates accordingly, driving the fixed ring 3930 fixed on the top thereof to rotate together, thereby driving the L-shaped connecting rods 3940 fixedly connected on both sides of the fixing ring 3930 to rotate together, thereby driving the movable ball 3960 to slide in the wave groove 3980 in the annular connecting plate 3970, driving the fixing ring 3930 and the movable sleeve 360 ​​to move up and down together, thereby driving the fixed rod 370 fixed on the outer wall of the movable sleeve 360 ​​to move up and down synchronously. At this time, if the fixing rod 370 The rotating connecting rod 380 of the dry group moves up and down with the fixed rod 370, and swings around the rotating axis as the rotation center. When the rotating connecting rod 380 rotates in the direction close to the fixed rod 370, it drives the fixed block 390 and the push block 3910 connected to the other end of the rotating connecting rod 380 to move into the storage groove 3920. When the rotating connecting rod 380 rotates in the direction away from the fixed rod 370, it drives the fixed block 390 and the push block 3910 to move out of the storage groove 3920. This realizes the process of the drill rod 340 descending and rotating. In the process, the coal collected in the receiving groove 3920 is repeatedly squeezed and compacted outward to further increase the density of the coal layer in the borehole, and then water containing water vapor is introduced through the first extraction pipe 450. At this time, the gas will combine with the coal layer in the borehole, making the coal layer in the borehole viscous, further improving the sealing of the borehole and the outer wall of the outer cylinder 260, and preventing gas from overflowing from the gap between the borehole and the outer cylinder 260. The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. ;

[0032] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A sealed coal mine underground directional drilling gas extraction device, comprising a frame body (100), characterized in that: A sealing mechanism (200) is installed inside the rack body (100), and the sealing mechanism (200) comprises connection boxes (210) fixedly installed on both sides of the inner cavity of the rack body (100), and threaded screws (220) are longitudinally arranged in two groups of the connection boxes (210), and the top ends of the two groups of threaded screws (220) extend through the top of the rack body (100) and are installed with a first motor (230), and the output end of the first motor (230) is fixedly connected to the threaded screw (220) via a coupling, and the outer walls of the two groups of threaded screws (220) are threadedly connected to the moving rods (240), and the two groups of moving rods (240) are connected to the outer walls of the two groups of threaded screws (220). The movable rod (240) is fixedly connected to a lifting plate (250) at one end thereof, the bottom of the lifting plate (250) is rotatably connected to an outer cylinder (260), a bearing is provided between the outer cylinder (260) and the bottom of the lifting plate (250), the outer wall of the outer cylinder (260) is provided with a plurality of groups of movable grooves (270) equidistantly distributed from top to bottom, damping blocks (271) are fixedly installed at both ends of the inner side of each group of movable grooves (270), and a movable plug plate (280) is slidably connected between the two damping blocks (271) inside each group of movable grooves (270), and a rotating assembly (300) is provided above the lifting plate (250); The rotating assembly (300) comprises a second motor (310) fixedly mounted on one side of the upper surface of the lifting plate (250); a first gear (320) is fixedly connected to the output end of the second motor (310); a second gear (321) is meshed with one side of the first gear (320); the second gear (321) is connected to the lifting plate (250) via a connecting column (330); a drill rod (340) is fixedly mounted on the bottom of the inner side of the outer cylinder (260); a certain gap is provided between the outer wall of the drill rod (340) and the inner wall of the outer cylinder (260); the bottom end of the connecting column (330) extends through to the bottom of the lifting plate (250) and is fixedly connected to the top of the outer cylinder (260); a bearing is provided at the connection between the connecting column (330) and the lifting plate (250); the interior of the drill rod (340) is hollow, and the outer wall of the hollow part is An annular movable chamber (350) is opened on the side, a movable sleeve (360) is slidably connected in the annular movable chamber (350), four groups of fixed rods (370) distributed in a circumference are fixedly installed on the outer wall of the movable sleeve (360), one side of the four groups of fixed rods (370) is installed with a plurality of rotating connecting rods (380) distributed equidistantly from top to bottom, and each group of rotating connecting rods (380) is rotatably connected to the fixed rod (370) via a rotating shaft, the other end of each group of rotating connecting rods (380) is rotatably connected to a fixed block (390) via a rotating shaft, and a push block (3910) is fixedly installed on the other side of each group of fixed blocks (390), and a plurality of receiving grooves (3920) matching the push blocks (3910) are opened on the outer wall of the drill rod (340), and each push block (3910) is slidably connected to the corresponding receiving groove (3920).

2. A sealed coal mine underground directional drilling gas extraction device according to claim 1, characterized in that: The movable grooves (270) provided on the outer wall of the outer cylinder (260) are provided in four rows from top to bottom, and two adjacent rows of movable grooves (270) are arranged in a staggered manner. Each group of movable plug plates (280) is arranged obliquely, and each group of movable plug plates (280) is arranged in a shape that is thick outside and thin inside. Both sides of each group of movable plug plates (280) are provided with sliding grooves (281) that match the damping blocks (271), and the bottom of the inner cavity of the sliding grooves (281) and the bottom of the movable plug plates (280) are provided with transverse grooves (282).

3. A sealed coal mine underground directional drilling gas extraction device according to claim 1, characterized in that: The top of the movable sleeve (360) is fixedly connected to a fixing ring (3930), and both sides of the fixing ring (3930) are fixedly connected to L-shaped connecting rods (3940). The other ends of the two groups of L-shaped connecting rods (3940) pass through the outside of the drill pipe (340) and the outer tube (260) and are fixedly installed with a connecting sleeve (3950). A movable ball (3960) is installed inside the connecting sleeve (3950). The bottom of the lifting plate (250) is located outside the outer tube (260) and is fixedly connected to an annular connecting plate (3970). A wave groove (3980) matching the movable ball (3960) is opened inside the annular connecting plate (3970), and the movable ball (3960) is slidably connected to the wave groove (3980).

4. A sealed coal mine underground directional drilling gas extraction device according to claim 3, characterized in that: The upper ends of the outer walls of the outer cylinder (260) and the drill rod (340) are both provided with a movable chamber that matches the L-shaped connecting rod (3940).

5. A sealed coal mine underground directional drilling gas extraction device according to claim 1, characterized in that: The threaded screw rod (220) is connected to the bottom of the inner cavity of the connection box (210) via a bearing, and a slide groove matching the moving rod (240) is provided on opposite sides of the two groups of connection boxes (210).

6. A sealed coal mine underground directional drilling gas extraction device according to claim 1, characterized in that: A collecting assembly (400) is provided inside the drill rod (340), and the collecting assembly (400) includes a plurality of through holes (410) opened at the bottom of the drill rod (340); an annular filter screen (420) is fixedly installed at the bottom of the hollow area inside the drill rod (340); a first gas concentration sensor (430) is fixedly installed above the filter screen (420) in the hollow area inside the drill rod (340); a through groove connected to the hollow area inside the drill rod (340) is opened at the top of the outer cylinder (260) and in the connecting column (330); a connecting pipe (440) is connected to the through groove at the top of the connecting column (330); the other end of the connecting pipe (440) extends through to the top of the frame body (100) and is fixedly connected to the first extraction pipe (450).

7. A sealed coal mine underground directional drilling gas extraction device according to claim 6, characterized in that: The through hole (410) at the bottom end of the drill rod (340) is arranged in a trumpet shape with a larger inner diameter and a smaller outer diameter, and each of the through holes (410) is inclined.

8. A sealed coal mine underground directional drilling gas extraction device according to claim 1, characterized in that: A second gas concentration sensor (460) is fixedly installed on the rear side of the inner cavity of the frame body (100), a temperature sensor (480) is installed on the rear side of the inner cavity of the frame body (100) and located on one side of the second gas concentration sensor (460), and a second extraction pipe (470) is fixedly connected to one side of the frame body (100).

9. A sealed coal mine underground directional drilling gas extraction device according to claim 1, characterized in that: An observation window (110) is installed on the front side of the frame body (100).

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