Underground engineering coal rock mass drilling construction device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUYANG COAL MINE OF SHANXI LUAN ENVIRONMENTAL ENERGY DEV CO LTD
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-21
Smart Images
Figure CN224532632U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of underground engineering coal and rock mass drilling construction technology, and in particular to an underground engineering coal and rock mass drilling construction device. Background Technology
[0002] In underground coal mines, drilling operations accompany the entire lifecycle of the mining project. However, drilling operations often encounter uneven rock breaking when encountering coal-rock interlayers or soft-hard transitional rock strata. This causes loosely broken rock fragments to jam the drill bit and force it to retract, severely affecting the drilling time and exacerbating the damage to the drill bit, which is detrimental to efficient drilling operations.
[0003] While existing research has yielded significant achievements in the development of high-efficiency rock-breaking drill bits, high-strength drill rods, and drill bit materials, making outstanding contributions to drilling operations in the field of underground engineering, there are still some shortcomings in the research on integrated rod-assisted rock breaking.
[0004] Therefore, there is an urgent need for a drilling device for underground coal and rock masses that can effectively assist in breaking rocks with an integrated rod, thereby improving drilling efficiency and preventing drill bit jamming. Utility Model Content
[0005] The purpose of this invention is to provide a drilling device for underground coal and rock masses to solve the problems existing in the prior art.
[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides an underground engineering coal and rock drilling device, including a rod body, one end of which is threadedly connected to a drill bit. Retractable auxiliary rock-breaking tools are symmetrically arranged on the outer wall of the rod body near the drill bit. Each retractable auxiliary rock-breaking tool is rotatably connected to a drive unit for extending and retracting the tool, and the drive unit is located within the rod body. The retractable auxiliary rock-breaking tool includes a cutter arm, and multiple cutter heads for breaking up rock blocks within the borehole are installed at the end of the cutter arm facing the borehole wall.
[0007] Preferably, one end of the blade arm is rotatably connected to a first telescopic arm and a third telescopic arm via a fourth connecting pin, and the other end of the blade arm is rotatably connected to a second telescopic arm and a fourth telescopic arm via a fifth connecting pin.
[0008] Preferably, the end of the third telescopic arm away from the blade arm is rotatably connected to a second slider via a third connecting pin, and the end of the fourth telescopic arm away from the blade arm is rotatably connected to a first slider via a sixth connecting pin.
[0009] Preferably, the first slider and the second slider are slidably connected by a groove, which is formed on the rod body and communicates with the inner cavity of the rod body.
[0010] Preferably, the ends of the first telescopic arm and the second telescopic arm away from the blade arm extend through the groove into the inner cavity of the rod body.
[0011] Preferably, the driving unit includes a lower limiter and an upper limiter disposed within the inner cavity of the rod body, the lower limiter and the upper limiter being fixedly connected to the inner wall of the inner cavity of the rod body, and a piston being disposed between the lower limiter and the upper limiter.
[0012] Preferably, the piston moves between the lower limiter and the upper limiter.
[0013] Preferably, a push rod is fixedly connected to one end of the piston facing the lower limiter.
[0014] Preferably, the piston is rotatably connected to the two first telescopic arms via a first connecting pin.
[0015] Preferably, the piston is rotatably connected to the two second telescopic arms via a second connecting pin.
[0016] The present invention discloses the following technical effects:
[0017] This invention features retractable auxiliary rock-breaking tools symmetrically arranged on the outer wall of the rod body near the drill bit. When drilling encounters coal-rock interlayers or soft-hard transitional rock layers, uneven rock breaking can cause low-fragmentation rock blocks to jam the drill bit and cause it to retract. The retractable auxiliary rock-breaking tools can effectively break up the rock blocks that are jamming the drill bit, thereby improving drilling efficiency and effectively preventing the drill bit from getting stuck. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;
[0020] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;
[0021] The components are as follows: 1. First rock mass; 2. First slider; 3. Cutting head; 4. Rod body; 5. Second rock mass; 6. Push rod; 7. Lower limiter; 8. Drill bit connecting thread; 9. Drill bit; 10. Upper limiter; 11. First telescopic arm; 12. First connecting pin; 13. Second connecting pin; 14. Second telescopic arm; 15. Piston; 16. Second slider; 17. Third connecting pin; 18. Third telescopic arm; 19. Fourth connecting pin; 20. Cutting arm; 21. Fifth connecting pin; 22. Fourth telescopic arm. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Reference Figures 1 to 2 This utility model discloses an underground engineering coal and rock drilling construction device, including a rod body 4, one end of which is threadedly connected to a drill bit 9. Retractable auxiliary rock-breaking tools are symmetrically arranged on the outer wall of the rod body 4 near the drill bit 9. The retractable auxiliary rock-breaking tools are rotatably connected to a drive unit for extending and retracting the tools, and the drive unit is located inside the rod body 4. The retractable auxiliary rock-breaking tool includes a cutter arm 20, and multiple cutter heads 3 for breaking up rock blocks inside the borehole are installed at the end of the cutter arm 20 facing the borehole wall.
[0025] To facilitate the installation and removal of drill bit 9, drill bit 9 is threadedly connected to the rod body 4 via drill bit connecting thread 8.
[0026] This invention features retractable auxiliary rock-breaking tools symmetrically arranged on the outer wall of the rod body 4 near the drill bit 9. When drilling encounters coal-rock interlayers or soft-hard transitional rock layers, uneven rock breaking can cause low-fragmentation rock blocks to jam the drill bit 9 and cause it to retract. The retractable auxiliary rock-breaking tool head 3 can effectively break the rock blocks that are jamming the drill bit 9, which not only improves drilling efficiency but also effectively prevents the drill bit 9 from getting stuck.
[0027] In a further optimized design, one end of the blade arm 20 is rotatably connected to the first telescopic arm 11 and the third telescopic arm 18 via the fourth connecting pin 19, and the other end of the blade arm 20 is rotatably connected to the second telescopic arm 14 and the fourth telescopic arm 22 via the fifth connecting pin 21.
[0028] The distance between the cutter arm 20 and the inner wall of the borehole can be adjusted by rotating the first telescopic arm 11 and the third telescopic arm 18 along the fourth connecting pin 19 and rotating the second telescopic arm 14 and the fourth telescopic arm 22 along the fifth connecting pin 21.
[0029] In a further optimized design, the end of the third telescopic arm 18 furthest from the blade arm 20 is rotatably connected to the second slider 16 via the third connecting pin 17, and the end of the fourth telescopic arm 22 furthest from the blade arm 20 is rotatably connected to the first slider 2 via the sixth connecting pin.
[0030] The first slider 2 and the second slider 16 drive the fourth telescopic arm 22 and the third telescopic arm 18 to rotate effectively, which can adjust the distance between the cutter arm 20 and the inner wall of the borehole.
[0031] In a further optimized design, the first slider 2 and the second slider 16 are slidably connected by a groove, which is opened on the main body 4 of the rod and communicates with the inner cavity of the main body 4 of the rod.
[0032] By moving the first slider 2 and the second slider 16 along the slide groove, the first slider 2 and the second slider 16 can effectively drive the fourth telescopic arm 22 and the third telescopic arm 18 to rotate.
[0033] In a further optimized design, the ends of the first telescopic arm 11 and the second telescopic arm 14 that are away from the blade arm 20 extend through the slide groove into the inner cavity of the rod body 4.
[0034] The first telescopic arm 11 and the second telescopic arm 14 pass through the slide groove, so that the first telescopic arm 11 and the second telescopic arm 14 can effectively adjust the distance between the cutter arm 20 and the inner wall of the borehole.
[0035] In a further optimized design, the drive unit includes a lower limiter 7 and an upper limiter 10 disposed within the inner cavity of the rod body 4. The lower limiter 7 and the upper limiter 10 are fixedly connected to the inner wall of the inner cavity of the rod body 4, and a piston 15 is disposed between the lower limiter 7 and the upper limiter 10.
[0036] The movement of piston 15 is limited by lower limiter 7 and upper limiter 10.
[0037] With further optimization, piston 15 moves between lower limiter 7 and upper limiter 10.
[0038] The piston 15 can move between the lower limit device 7 and the upper limit device 10 through the lower limit device 7 and the upper limit device 10.
[0039] In a further optimized design, a push rod 6 is fixedly connected to the end of piston 15 facing the lower limiter 7. The push rod 6 drives piston 15 to move between the lower limiter 7 and the upper limiter 10.
[0040] The central axis of push rod 6 and the central axis of piston 15 are on the same central axis as the central axis of rod body 4.
[0041] In a further optimized design, piston 15 is rotatably connected to two first telescopic arms 11 via first connecting pin 12.
[0042] In a further optimized design, piston 15 is rotatably connected to two second telescopic arms 14 via second connecting pin 13.
[0043] By moving the piston 15 between the lower limiter 7 and the upper limiter 10, the piston 15 can drive the two first telescopic arms 11 to rotate via the first connecting pin 12 and drive the two second telescopic arms 14 to rotate via the second connecting pin 13, which can effectively adjust the distance between the cutter arm 20 and the inner wall of the borehole.
[0044] Different rock strata are distinguished by the first rock mass 1 and the second rock mass 5; refer to Figure 1 , Figure 1 In the middle, the main body 4 of the rod is located at the junction of the first rock mass 1 and the second rock mass 5.
[0045] Working process: When the drill bit 9 is working and breaking rocks, the telescopic auxiliary rock-breaking tool is in the retracted state, that is, the piston 15 is brought into contact with the lower limit device 7 by the push rod 6. At this time, the first slider 2 is in the lower position, the second slider 16 is in the upper position, and the first telescopic arm 11, the second telescopic arm 14, the third telescopic arm 18, and the fourth telescopic arm 22 are in the retracted state, so that the cutter head 3 and the cutter arm 20 are close to the position of the slide groove, that is, the telescopic auxiliary rock-breaking tool is in the retracted state.
[0046] When the drill bit 9 and the rod body 4 encounter a large free rock block that jams the drill bit 9 during retraction, the telescopic auxiliary rock-breaking tool is in the extended state. That is, the push rod 6 pushes the piston 15 upward to the upper limit device 10. Through the first connecting pin 12, the second connecting pin 13, the third connecting pin 17, the fourth connecting pin 19, the fifth connecting pin 21, and the sixth connecting pin, the force is transmitted to the first telescopic arm 11, the second telescopic arm 14, the third telescopic arm 18, and the fourth telescopic arm 22, which are in the extended state. This places the cutter head 3 and the cutter arm 20 at the position of the large free rock block. The rod body 4 drives the cutter head 3 to rotate, enabling the cutter head 3 to break the free rock block. After rock breaking is completed, the telescopic auxiliary rock-breaking tool returns to the retracted state, and the drill bit 9 and the rod body 4 can continue to retract.
[0047] This invention, through the extension and retraction of the cutter arm 20, enables the cutter head 3 to break up large, incompletely broken free rock blocks, effectively solving the problem of drill bit jamming during drilling operations. This invention not only improves drilling efficiency but also effectively prevents drill bit jamming, thus effectively protecting the drill bit 9.
[0048] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0049] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A drilling device for underground coal and rock mass drilling, characterized in that: The rod body (4) includes a rod body (4) with a drill bit (9) threaded to one end. A retractable auxiliary rock-breaking tool is symmetrically arranged on the outer wall of the rod body (4) near the drill bit (9). The retractable auxiliary rock-breaking tool is rotatably connected to a drive unit for driving the retractable auxiliary rock-breaking tool to extend and retract. The drive unit is located inside the rod body (4). The retractable auxiliary rock-breaking tool includes a cutter arm (20), and a plurality of cutter heads (3) for breaking rock blocks in the borehole are installed at one end of the cutter arm (20) facing the borehole wall.
2. The underground engineering coal and rock mass drilling device according to claim 1, characterized in that: One end of the blade arm (20) is rotatably connected to the first telescopic arm (11) and the third telescopic arm (18) via the fourth connecting pin (19), and the other end of the blade arm (20) is rotatably connected to the second telescopic arm (14) and the fourth telescopic arm (22) via the fifth connecting pin (21).
3. The underground engineering coal and rock mass drilling device according to claim 2, characterized in that: The third telescopic arm (18) is rotatably connected to a second slider (16) at one end away from the blade arm (20) via a third connecting pin (17), and the fourth telescopic arm (22) is rotatably connected to a first slider (2) at one end away from the blade arm (20) via a sixth connecting pin.
4. The underground engineering coal and rock mass drilling device according to claim 3, characterized in that: The first slider (2) and the second slider (16) are slidably connected by a groove, which is opened on the rod body (4) and communicates with the inner cavity of the rod body (4).
5. The underground engineering coal and rock mass drilling device according to claim 4, characterized in that: The ends of the first telescopic arm (11) and the second telescopic arm (14) away from the blade arm (20) extend through the groove into the inner cavity of the rod body (4).
6. The underground engineering coal and rock mass drilling device according to claim 5, characterized in that: The drive unit includes a lower limit device (7) and an upper limit device (10) disposed in the inner cavity of the rod body (4). The lower limit device (7) and the upper limit device (10) are fixedly connected to the inner wall of the inner cavity of the rod body (4). A piston (15) is disposed between the lower limit device (7) and the upper limit device (10).
7. The underground engineering coal and rock mass drilling device according to claim 6, characterized in that: The piston (15) moves between the lower limiter (7) and the upper limiter (10).
8. The underground engineering coal and rock mass drilling device according to claim 6, characterized in that: A push rod (6) is fixedly connected to one end of the piston (15) facing the lower limiter (7).
9. The underground engineering coal and rock mass drilling device according to claim 6, characterized in that: The piston (15) is rotatably connected to the two first telescopic arms (11) via a first connecting pin (12).
10. The underground engineering coal and rock mass drilling device according to claim 6, characterized in that: The piston (15) is rotatably connected to the two second telescopic arms (14) via the second connecting pin (13).