Adjustable drilling device for coal mine gas extraction

Abstract

This invention belongs to the field of coal mine safety technology and discloses an adjustable drilling device for coal mine gas drainage, comprising two rings: a contraction structure inside the rings and an adjustment and positioning structure between the two rings; and a linkage structure on the outer side of the rings, located on the side of the contraction structure. This invention, through the linkage design of the rotating ring and gear set, allows all sliding columns to extend and retract synchronously with just one handle, eliminating the need to adjust individual parts, making work easier in the confined space underground. The addition of a rubber wheel with spiral anti-slip texture ensures a firm grip on support structures of different shapes and withstands underground vibrations, preventing the device from loosening or tilting, thus enhancing operational safety. Drilling is both accurate and flexible; with the cooperation of the adjustment plate and the second T-groove, the drilling angle can be adjusted arbitrarily to adapt to different gas layer orientations. Furthermore, the positioning of the slider and the graduated groove allows for precise control of the drilling spacing, enabling accurate construction according to the drainage plan, whether it's a single row of holes or an angled hole, avoiding incomplete gas drainage due to drilling misalignment, which is beneficial for practical application and operation.

Description

Technical Field

[0001] This invention relates to the field of coal mine safety technology, and in particular to an adjustable drilling device for coal mine gas extraction. Background Technology

[0002] Gas drainage is a core technical means to prevent gas explosions and gas outbursts in underground coal mines, and precise and standardized drilling operations are the key to ensuring the effectiveness of gas drainage.

[0003] In practical applications, existing drilling auxiliary devices often employ an "individually adjustable" clamping and fixing structure (e.g., a single bolt controlling a single clamping block). Workers in the confined, dimly lit underground space must operate multiple sets of fixing components individually, which is not only time-consuming and labor-intensive, but also results in asynchronous extension and retraction of the clamping blocks, making it difficult to achieve a tight fit with underground roadway supports, walls, and other supporting structures. Furthermore, traditional clamping components have weak anti-slip properties, and vibrations during underground operations can easily cause the device to loosen and shift, affecting drilling accuracy and posing safety hazards. The clamping range and drilling layout of existing devices are often "customized," requiring different devices for different roadway sizes and extraction schemes. This not only increases equipment procurement costs but also necessitates frequent tool handling and replacement underground, severely impacting work progress and hindering practical application and operation. Summary of the Invention

[0004] One objective of this invention is to provide an adjustable drilling device for coal mine gas extraction.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an adjustable drilling device for coal mine gas extraction, comprising two rings: the inside of the rings is provided with a contraction structure, the two rings are provided with an adjustment and positioning structure, and the outer side of the rings and the side located on the contraction structure are provided with a linkage structure.

[0006] The retraction structure includes a sliding column, a clamping block, a rubber wheel, a limiting plate, a first toothed groove, and a first gear; the adjustment and positioning structure includes an adjustment plate, a sliding groove, a through groove, a slider, a first fixing bolt, an adjustment block, and a drill hole; the linkage structure includes a fixing block, a second gear, a first T-groove, a first T-bar, a rotating ring, a second toothed groove, and a handle.

[0007] A second T-groove is provided on each side of the ring that is close to it. A second T-strip is slidably connected inside the second T-groove. An adjusting plate is fixedly connected between two second T-strips. An adjusting groove is provided on the outer side of the adjusting plate. A sliding groove is provided inside the adjusting plate and on both sides of the adjusting groove. A slider is equidistantly connected inside the sliding groove. An adjusting block is fixedly connected between two sliders. A drilled hole is provided on the outer side of the adjusting block.

[0008] Preferably, each of the outer sides of the ring is slidably connected with a sliding column at equal intervals, one end of each sliding column penetrates the ring, and a clamping block is fixedly connected to one end of each sliding column and located on the inner wall of the ring. A rubber wheel is rotatably connected inside each clamping block. Each of the sliding columns has a first tooth groove at equal intervals on one side. Each of the outer sides of the ring is fixedly connected with a fixing block at equal intervals. A rotating shaft is rotatably connected to the outer side of each fixing block. One end of each rotating shaft is fixedly connected with a first gear, and the first gear meshes with the corresponding first tooth groove.

[0009] Preferably, each of the outer sides of the ring is provided with a first T-groove, and each of the first T-grooves is slidably connected with a first T-strip at equal intervals inside the first T-groove. A rotating ring is fixedly connected between multiple first T-stripes and on the outer side of the ring. Each of the rotating rings is provided with a second tooth groove at equal intervals on its surface. A second gear is fixedly connected to the end of the rotating shaft away from the first gear, and the second gear meshes with the second tooth groove.

[0010] Preferably, the top of the adjusting plate and above the slide groove are provided with through grooves, and the outer side of the slider is threaded with a first fixing bolt. The first fixing bolt extends through the through groove to the top of the adjusting plate. Rotating the first fixing bolt causes the nut at the top of the first fixing bolt to press the adjusting plate, thereby fixing the slider.

[0011] Preferably, the inner wall of each ring is provided with a circular groove, and the inside of the circular groove is provided with fixing holes at equal intervals. The outer side of the second T-strip is threaded with a second fixing bolt, and the second fixing bolt is threadedly connected to the second T-strip through the fixing hole.

[0012] Preferably, handles are fixedly connected at equal intervals on the outer side of the rotating ring, a limit plate is fixedly connected to one end of each sliding column, scale grooves are provided at equal intervals on the outer side of the ring and above the adjusting plate, and an indicator groove is provided on the top of the adjusting plate and below the corresponding scale groove.

[0013] Preferably, the outer peripheral wall of the rubber wheel is evenly provided with spiral anti-slip texture, and the handles on the outer side of the rotating ring are evenly distributed at equal angles along the circumference of the rotating ring, and the extension direction of the handles is perpendicular to the radial direction of the rotating ring; when any handle is operated to drive the rotating ring to rotate, the rotating ring simultaneously meshes with all the second gears through the second tooth groove, thereby driving all the sliding columns to synchronously extend and retract along the radial direction of the ring, realizing the synchronous closing or opening of the clamping blocks.

[0014] Preferably, the indicator groove on the top of the adjustment plate corresponds to the scale groove on the outer side of the ring for accurately reading the sliding stroke of the slider. After the slider aligns the indicator groove with the target scale, the first fixing bolt is tightened. The slider is positioned and locked in the groove by the contact and pressing of the first fixing bolt nut with the top surface of the adjustment plate.

[0015] Preferably, while the adjusting plate slides in the second T groove via the second T strip, it can rotate around the axis of the ring. After adjusting the adjusting plate to an angle that matches the direction of the gas extraction borehole, the second fixing bolt is screwed into the corresponding fixing hole in the ring groove to complete the angle fixing of the adjusting plate on the side of the ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention utilizes a rotating ring and gear set linkage design, allowing all sliding columns to extend and retract synchronously with just one handle rotation, eliminating the need to adjust individual parts and making work easier in confined underground spaces. The addition of a rubber wheel with spiral anti-slip texture ensures a firm grip on support structures of different shapes and withstands underground vibrations, preventing the device from loosening or tilting and enhancing operational safety. Drilling is both precise and flexible; thanks to the adjustment plate and the second T-groove, the drilling angle can be freely adjusted to adapt to different gas layer orientations. Furthermore, the positioning of the slider and graduated groove allows for precise control of the drilling spacing, enabling accurate drilling according to the extraction plan, whether using a single row of holes or angled holes, avoiding incomplete gas extraction due to drilling misalignment.

[0018] 2. This invention features a retractable sliding column that can adapt to downhole support structures of different sizes; the adjusting plate allows for angle and hole position adjustments, eliminating the need to purchase multiple sets of equipment for different extraction areas, saving on procurement costs and the hassle of moving equipment and changing tools downhole; it is fast and safe, with high extraction efficiency, stable device fixation, and accurate drilling position, preventing the dangers of drill rod swaying or device loosening, and allowing all drill hole positions to be set at once, saving time spent repeatedly adjusting the drilling rig; with increased drilling efficiency, gas can be extracted faster, and the downhole gas safety risk is lower. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a top view of the structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the first view of the annular cross-section structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the second perspective structure of the annular cross-section of the present invention.

[0023] Figure 5 For the present invention Figure 2 A magnified schematic diagram of the structure at point A.

[0024] In the diagram: 1. Ring; 2. Sliding column; 3. Fixing block; 4. Rotating shaft; 5. First gear; 6. First tooth groove; 7. Second gear; 8. First T-groove; 9. First T-bar; 10. Rotating ring; 11. Second tooth groove; 12. Handle; 13. Clamping block; 14. Rubber wheel; 15. Limiting plate; 16. Second T-groove; 17. Second T-bar; 18. Adjusting plate; 19. Sliding groove; 20. Through groove; 21. Sliding block; 22. First fixing bolt; 23. Adjusting block; 24. Drill hole; 25. Indicator groove; 26. Circular groove; 27. Second fixing bolt; 28. Adjusting groove; 29. ​​Scale groove. Detailed Implementation

[0025] The present invention will now be further described in conjunction with specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this invention, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0027] It should be noted that the terms "first" and "second" in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] One preferred embodiment of the present invention, such as Figures 1 to 5 As shown, an adjustable drilling device for coal mine gas extraction includes two rings 1: the inside of the ring 1 is provided with a contraction structure, the two rings 1 are provided with an adjustment and positioning structure, and the outer side of the ring 1 and the side located on the contraction structure are provided with a linkage structure.

[0029] The retraction structure includes a sliding column 2, a clamping block 13, a rubber wheel 14, a limiting plate 15, a first toothed groove 6, and a first gear 5; the adjustment and positioning structure includes an adjusting plate 18, a sliding groove 19, a through groove 20, a slider 21, a first fixing bolt 22, an adjusting block 23, and a drill hole 24; the linkage structure includes a fixing block 3, a second gear 7, a first T-groove 8, a first T-bar 9, a rotating ring 10, a second toothed groove 11, and a handle 12.

[0030] A second T-groove 16 is provided on each side of the ring 1 that is close to it. A second T-strip 17 is slidably connected inside the second T-groove 16. An adjusting plate 18 is fixedly connected between the two second T-strips 17. An adjusting groove 28 is provided on the outer side of the adjusting plate 18. A sliding groove 19 is provided inside the adjusting plate 18 and on both sides of the adjusting groove 28. A slider 21 is slidably connected at equal intervals inside the sliding groove 19. An adjusting block 23 is fixedly connected between each pair of sliders 21. A drill hole 24 is provided on the outer side of each adjusting block 23.

[0031] Sliding pins 2 are equidistantly connected to the outer side of the ring 1. One end of each sliding pin 2 passes through the ring 1. A clamping block 13 is fixedly connected to one end of each sliding pin 2 and located on the inner wall of the ring 1. A rubber wheel 14 is rotatably connected inside each clamping block 13. A first tooth groove 6 is equidistantly opened on one side of each sliding pin 2. A fixing block 3 is fixedly connected to the outer side of the ring 1 at equal intervals. A rotating shaft 4 is rotatably connected to the outer side of each fixing block 3. A first gear 5 is fixedly connected to one end of each rotating shaft 4. The first gear 5 meshes with the corresponding first tooth groove 6.

[0032] The outer side of the ring 1 is provided with a first T-groove 8. The inner side of the first T-groove 8 is equidistantly connected with a first T-strip 9. A rotating ring 10 is fixedly connected between multiple first T-strips 9 and located on the outer side of the ring 1. The surface of the rotating ring 10 is provided with a second tooth groove 11 equidistantly. The end of the rotating shaft 4 away from the first gear 5 is fixedly connected with a second gear 7. The second gear 7 meshes with the second tooth groove 11.

[0033] The top of the adjusting plate 18 and above the slide groove 19 are provided with through grooves 20. The outer side of the slider 21 is threaded with a first fixing bolt 22. The first fixing bolt 22 extends through the through groove 20 to the top of the adjusting plate 18. Rotating the first fixing bolt 22 causes the nut at the top of the first fixing bolt 22 to press the adjusting plate 18, thereby fixing the slider 21.

[0034] The inner wall of the ring 1 is provided with a circular groove 26, and the inside of the circular groove 26 is provided with a fixing hole at equal intervals. The outer side of the second T-bar 17 is threadedly connected with a second fixing bolt 27, and the second fixing bolt 27 is threadedly connected to the second T-bar 17 through the fixing hole.

[0035] Handles 12 are fixedly connected at equal intervals on the outer side of the rotating ring 10. Limiting plates 15 are fixedly connected to one end of each sliding column 2. Scale grooves 29 are provided at equal intervals on the outer side of the ring 1 and above the adjusting plate 18. Indicator grooves 25 are provided on the top of the adjusting plate 18 and below the corresponding scale grooves 29.

[0036] The outer circumferential wall of the rubber wheel 14 is evenly provided with spiral anti-slip texture. The handles 12 on the outer side of the rotating ring 10 are evenly distributed at equal angles along the circumference of the rotating ring 10, and the extension direction of the handles 12 is perpendicular to the radial direction of the rotating ring 10. When any handle 12 is operated to drive the rotating ring 10 to rotate, the rotating ring 10 simultaneously meshes with all the second gears 7 through the second tooth groove 11, thereby driving all the sliding pillars 2 to synchronously extend and retract along the radial direction of the ring 1, so as to realize the synchronous closing or opening of the clamping block 13.

[0037] The indicator groove 25 on the top of the adjusting plate 18 corresponds to the scale groove 29 on the outer side of the ring 1, which is used to accurately read the sliding stroke of the slider 21. After sliding the slider 21 to align the indicator groove 25 with the target scale, tighten the first fixing bolt 22. The slider 21 is positioned and locked in the slide groove 19 by the contact and pressing of the nut of the first fixing bolt 22 with the top surface of the adjusting plate 18.

[0038] While the adjusting plate 18 slides in the second T groove 16 via the second T strip 17, it can rotate around the axis of the ring 1. After adjusting the adjusting plate 18 to an angle that matches the direction of the gas extraction borehole, the second fixing bolt 27 is screwed into the corresponding fixing hole in the circular groove 26 to complete the angle fixing of the adjusting plate 18 on the side of the ring 1.

[0039] Working principle:

[0040] In use, the device is first transported to the target area for gas extraction in the coal mine. The operator holds the handle 12 and rotates it. The handle 12 is connected to the rotating ring 10. The rotating ring 10 slides smoothly along the first T-groove 8 on the outer side of the ring 1 via the first T-bar 9. The second tooth groove 11 on the surface of the rotating ring 10 will simultaneously "bite" all the second gears 7, driving the rotating shaft 4 and the first gear 5 at the other end of the rotating shaft to rotate together. The first gear 5 also meshes with the first tooth groove 6 on the side of the sliding column 2, so all the sliding columns 2 will synchronously extend and retract along the radial direction of the ring 1, driving the clamping block 13 at the end of the sliding column to retract towards the center of the ring or open outward together. Until the rubber wheel 14 in the clamping block 13 is tightly attached to the roadway support, the wall around the borehole and other supporting structures, the device is firmly fixed.

[0041] After the device is fixed, the angle and position of the borehole are adjusted according to the gas extraction requirements. The two rings 1 have second T-grooves 16 on their sides. The middle adjusting plate 18 can slide along the groove and rotate around the axis of the ring 1 through the second T-bars 17 at both ends. After rotating to the angle that matches the direction of the extraction borehole, the second fixing bolt 27 is screwed into the fixing hole corresponding to the circular groove 26 on the inner wall of the ring 1, and the angle of the adjusting plate is locked. The adjusting plate 18 has a sliding groove 19, and the slider 21 slides in the groove with the adjusting block 23 with the drill hole 24. By aligning the indicator groove 25 on the top of the adjusting plate 18 with the scale groove 29 on the outer side of the ring 1, the spacing of the borehole can be precisely controlled. After adjustment, the first fixing bolt 22 is tightened so that the nut presses against the top surface of the adjusting plate, and the position of the slider and the adjusting block is fixed. The drill rod of the gas extraction drill is aligned with the drill hole 24 on the adjusting block 23, and the drill is started to drill gas extraction holes according to the preset angle and spacing to complete the operation.

[0042] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection claimed by this invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable drilling device for coal mine gas extraction, characterized in that, It includes two rings (1): the inside of the ring (1) is provided with a contraction structure, the two rings (1) are provided with an adjustment and positioning structure, and the outer side of the ring (1) and the side of the contraction structure are provided with a linkage structure; The shrinking structure includes a sliding column (2), a clamping block (13), a rubber wheel (14), a limiting plate (15), a first tooth groove (6), and a first gear (5). The adjusting and positioning structure includes an adjusting plate (18), a sliding groove (19), a through groove (20), a slider (21), a first fixing bolt (22), an adjusting block (23), and a drill hole (24). The linkage structure includes a fixing block (3), a second gear (7), a first T-groove (8), a first T-bar (9), a rotating ring (10), a second tooth groove (11), and a handle (12). A second T-groove (16) is provided on the side of the ring (1) that is close to it. A second T-strip (17) is slidably connected inside the second T-groove (16). An adjustment plate (18) is fixedly connected between the two second T-strips (17). An adjustment groove (28) is provided on the outside of the adjustment plate (18). A sliding groove (19) is provided inside the adjustment plate (18) and on both sides of the adjustment groove (28). A slider (21) is slidably connected inside the sliding groove (19). An adjustment block (23) is fixedly connected between the two sliders (21). A drill hole (24) is provided on the outside of the adjustment block (23).

2. The adjustable drilling device for coal mine gas extraction as described in claim 1, characterized in that: The outer side of the ring (1) is equidistantly connected with sliding columns (2), one end of each sliding column (2) penetrates the ring (1), and one end of each sliding column (2) located on the inner wall of the ring (1) is fixedly connected with a clamping block (13). The inside of each clamping block (13) is rotatably connected with a rubber wheel (14). One side of each sliding column (2) is provided with a first tooth groove (6) at equal intervals. The outer side of the ring (1) is fixedly connected with a fixing block (3) at equal intervals. The outer side of each fixing block (3) is rotatably connected with a rotating shaft (4). One end of each rotating shaft (4) is fixedly connected with a first gear (5), and the first gear (5) meshes with the corresponding first tooth groove (6).

3. The adjustable drilling device for coal mine gas extraction as described in claim 2, characterized in that: The outer side of the ring (1) is provided with a first T-groove (8), and the inner side of the first T-groove (8) is equidistantly connected with a first T-strip (9). A rotating ring (10) is fixedly connected between multiple first T-strips (9) and located on the outer side of the ring (1). The surface of the rotating ring (10) is provided with a second tooth groove (11) equidistantly. The end of the rotating shaft (4) away from the first gear (5) is fixedly connected with a second gear (7). The second gear (7) meshes with the second tooth groove (11).

4. The adjustable drilling device for coal mine gas extraction as described in claim 1, characterized in that: The top of the adjusting plate (18) and above the slide groove (19) are provided with through grooves (20). The outer side of the slider (21) is threaded with a first fixing bolt (22). The first fixing bolt (22) extends through the through groove (20) to the top of the adjusting plate (18). Rotating the first fixing bolt (22) causes the nut at the top of the first fixing bolt (22) to press the adjusting plate (18) and thus fix the slider (21).

5. The adjustable drilling device for coal mine gas extraction as described in claim 1, characterized in that: The inner wall of the ring (1) is provided with a circular groove (26), and the inside of the circular groove (26) is provided with a fixing hole at equal intervals. The outer side of the second T strip (17) is threaded with a second fixing bolt (27), and the second fixing bolt (27) is threadedly connected to the second T strip (17) through the fixing hole.

6. The adjustable drilling device for coal mine gas extraction as described in claim 1, characterized in that: The outer side of the rotating ring (10) is fixedly connected with handles (12) at equal intervals. One end of the sliding column (2) is fixedly connected with a limit plate (15). The outer side of the ring (1) and above the adjusting plate (18) are provided with scale grooves (29) at equal intervals. The top of the adjusting plate (18) and below the corresponding scale groove (29) are provided with indicator grooves (25).

7. The adjustable drilling device for coal mine gas extraction as described in claim 3, characterized in that: The outer circumferential wall of the rubber wheel (14) is evenly provided with spiral anti-slip texture. The handles (12) on the outer side of the rotating ring (10) are evenly distributed at equal angles along the circumference of the rotating ring (10), and the extension direction of the handles (12) is perpendicular to the radial direction of the rotating ring (10). When any handle (12) is operated to drive the rotating ring (10) to rotate, the rotating ring (10) simultaneously meshes with all the second gears (7) through the second tooth groove (11) to rotate, thereby driving all the sliding columns (2) to synchronously extend and retract along the radial direction of the ring (1), so as to realize the synchronous closing or opening of the clamping block (13).

8. The adjustable drilling device for coal mine gas extraction as described in claim 6, characterized in that: The indicator groove (25) on the top of the adjustment plate (18) corresponds to the scale groove (29) on the outer side of the ring (1) for accurately reading the sliding stroke of the slider (21). After the slider (21) aligns the indicator groove (25) with the target scale, the first fixing bolt (22) is tightened. The slider (21) is positioned and locked in the groove (19) by the fit and pressure of the nut of the first fixing bolt (22) against the top surface of the adjustment plate (18).

9. The adjustable drilling device for coal mine gas extraction as described in claim 5, characterized in that: While the adjusting plate (18) slides in the second T groove (16) via the second T strip (17), it can rotate around the axis of the ring (1). After adjusting the adjusting plate (18) to an angle that matches the direction of the gas extraction borehole, the second fixing bolt (27) is screwed into the corresponding fixing hole in the circular groove (26) to complete the angle fixing of the adjusting plate (18) on the side of the ring (1).

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