Drill bit device for coal mine excavation

Abstract

The invention discloses a drill bit device for coal mine excavation, and particularly relates to the technical field of coal mine excavation, the drill bit device comprises a reinforcing cylinder, an excavation assembly is arranged on the reinforcing cylinder, the excavation assembly comprises a connecting plate arranged at one end of the reinforcing cylinder, a crushing disc is arranged on one side of the connecting plate, and a lining cylinder is arranged between the connecting plate and the crushing disc; a second connecting ring is fixedly arranged on the side, facing the reinforcing barrel, of the lining barrel. A third auxiliary drill bit and a reinforcing frame are installed on the outer side of the crushing disc through a bevel edge, so that the third auxiliary drill bit can be obliquely arranged, synchronous and efficient cutting of soft and hard rock strata is facilitated, a structure on the crushing disc conducts secondary cutting on residual rock ridges in the drilling direction in the crushing mining process, torque fluctuation of the crushing disc is effectively counteracted, and the mining efficiency is improved. The stick-slip effect of the crushing disc is reduced, the positions of the reinforcing blocks are adjusted, so that the crushing rods and the extension angles can gather or diffuse towards the center point of the crushing disc, the hole diameter adjusting function is achieved, and different operation requirements can be met without replacing a drill bit.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine excavation, and more specifically, the present invention relates to a drill bit device for coal mine excavation. Background Art

[0002] A coal mine is an area where humans extract coal resources in coal-rich mining areas, generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, generally choose to dig underground roadways to extract coal, this is an underground coal mine. When the distance between the coal seam and the surface is very close, generally choose to directly strip the surface soil layer to excavate coal, this is an open-pit coal mine.

[0003] Among them, the patent with publication number CN212642710U discloses a practical and safe coal mine roadheader excavation adjustment device, including a roadheader drill body. The roadheader drill body includes a drill bit, a protective cylinder is provided at the bottom end of the drill bit, a protective chamber is opened at the bottom end of the protective cylinder, a fixed cylinder is inserted into the protective chamber, a rotating groove is opened inside the fixed cylinder, a lead screw is inserted into the rotating groove, and one end of the lead screw is sleeved on the inner wall of the protective chamber through a rotating shaft, and a stabilizing plate is sleeved on the lead screw through a rotating shaft;

[0004] When this structure is in use, by setting a lead screw, a stabilizing plate, a stabilizing rod, a protective cylinder and a protective chamber, the rotation of the lead screw can be controlled by a machine, so that the drill bit moves, realizing the adjustment function of the drill bit. However, when this structure is in use, it is not easy to adjust the excavation range of the drill bit, resulting in low excavation efficiency. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a drill bit device for coal mine excavation, aiming to solve the problems raised in the above background art.

[0006] The present invention provides the following technical solutions: A drill bit device for coal mine excavation, including a reinforcing cylinder body, and an excavation assembly is arranged on the reinforcing cylinder body;

[0007] The excavation assembly includes a connecting plate arranged at one end of the reinforcing cylinder body, a crushing disc is arranged on one side of the connecting plate, and a lining cylinder is arranged between the connecting plate and the crushing disc;

[0008] On one side of the inner lining cylinder facing the reinforcing cylinder body, a second connecting ring is fixedly arranged. A plurality of guiding grooves are penetrated and opened between the second connecting ring and the inner lining cylinder. And a reinforcing block is slidably connected in each of the guiding grooves. One ends of the plurality of reinforcing blocks are all threadedly connected with a crushing rod. And an extension angle is fixedly arranged on one side of each of the reinforcing blocks. The extension angle extends to the outside of the crushing disc. A reinforcing ring is arranged between the connecting plate and the second connecting ring. A first connecting ring is rotatably connected to the reinforcing ring. The first connecting ring is fixed at the end of the reinforcing cylinder body. A spiral strip is fixedly arranged on one side of the reinforcing ring facing the reinforcing block. The spiral strip extends to the spiral groove and is slidably connected with the spiral groove. A toothed ring is fixedly arranged in the middle of the reinforcing ring. A servo motor is installed inside the servo motor through bolts. A gear is arranged at the output end of the servo motor. The gear is meshed with the toothed ring;

[0009] It can be seen that in the above technical solution, through the reinforcing blocks, extension angles and crushing rods on the outside of the inner lining cylinder, it is convenient for the structure on the crushing disc to perform secondary cutting on the residual rock ridges in the drilling direction during the crushing and mining process, effectively offsetting the torque fluctuation of the crushing disc and reducing the stick-slip effect of the crushing disc. At the same time, the servo motor drives the gear to rotate, the gear drives the toothed ring to rotate, and then the spiral strip can rotate. The traction force generated by the rotation of the spiral strip through the spiral groove enables the reinforcing block to displace in the guiding groove, realizing the function of adjusting the positions of each reinforcing block, so that each crushing rod and extension angle can gather or spread towards the center point of the crushing disc, realizing the function of adjusting the hole diameter, and adapting to different operation requirements without replacing the drill bit;

[0010] Optionally, in a possible implementation manner, the inner lining cylinder is fixedly connected to the crushing disc and the connecting plate through bolts. A plurality of limiting rods are fixedly arranged on the outside of the reinforcing cylinder body. And one end of each of the limiting rods extends to the outside of the inner lining cylinder and is detachably connected to the inner lining cylinder through bolts. A first installation groove is opened in the middle of the crushing disc. A plurality of first auxiliary drill bits are rotatably connected in the first installation groove. A plurality of second installation grooves are arranged on the outside of the first installation groove. And each of the second installation grooves is opened on the surface of the crushing disc. A second auxiliary drill bit is rotatably connected in each of the plurality of second installation grooves. And each of the second installation grooves is circumferentially distributed along the center point of the crushing disc. An inclined edge is opened on the outside of the crushing disc. The inclined edge is arranged obliquely upward. A plurality of third installation grooves are penetrated and opened on the inclined edge. A reinforcing frame is embedded in each of the plurality of third installation grooves. And a third auxiliary drill bit is rotatably connected in each of the reinforcing frames. The inner walls of the reinforcing frame, the second installation groove and the first installation groove are all fixedly provided with a resisting block. And each of the resisting blocks extends to the outside of the first auxiliary drill bit, the second auxiliary drill bit and the third auxiliary drill bit respectively;

[0011] It can be seen that in the above technical solution, when the crushing disc rotates, it drives multiple first auxiliary drill bits, second auxiliary drill bits, and third auxiliary drill bits to rotate for crushing and excavating coal mines. At the same time, the third auxiliary drill bit, the second auxiliary drill bit, and the first auxiliary drill bit can also rotate in the first installation groove, the second installation groove, and the strengthening frame respectively, which is conducive to the rotation of the first auxiliary drill bit, the second auxiliary drill bit, and the third auxiliary drill bit on the crushing disc, realizing the function of differential cutting and drilling. Moreover, the third auxiliary drill bit and the strengthening frame are installed on the outer side of the crushing disc through the bevel edge, so that the third auxiliary drill bit can be inclined, which is conducive to synchronous and efficient cutting of hard and soft rock formations.

[0012] The technical effects and advantages of the present invention:

[0013] 1. In the present invention, when the crushing disc rotates, it drives multiple first auxiliary drill bits, second auxiliary drill bits, and third auxiliary drill bits to rotate for crushing and excavating coal mines. At the same time, the third auxiliary drill bit, the second auxiliary drill bit, and the first auxiliary drill bit can also rotate in the first installation groove, the second installation groove, and the strengthening frame respectively, which is conducive to the rotation of the first auxiliary drill bit, the second auxiliary drill bit, and the third auxiliary drill bit on the crushing disc, realizing the function of differential cutting and drilling. Moreover, the third auxiliary drill bit and the strengthening frame are installed on the outer side of the crushing disc through the bevel edge, so that the third auxiliary drill bit can be inclined, which is conducive to synchronous and efficient cutting of hard and soft rock formations;

[0014] 2. In the present invention, through the strengthening blocks, extended angles, and crushing rods on the outer side of the inner lining cylinder, it is convenient for the structures on the crushing disc to perform secondary cutting on the residual rock ridges in the drilling direction during the crushing and mining process, and effectively offsets the torque fluctuation of the crushing disc and reduces the stick-slip effect of the crushing disc;

[0015] 3. In the present invention, the servo motor drives the gear to rotate, the gear drives the gear ring to rotate, and then the spiral bar can rotate. The strengthening block can displace in the guiding groove through the traction force generated when the spiral bar rotates through the spiral groove, realizing the function of adjusting the positions of each strengthening block, so that each crushing rod and extended angle can converge or diverge towards the center point of the crushing disc, realizing the function of adjusting the hole diameter, and can adapt to different operation requirements without replacing the drill bit;

[0016] In summary, through the coordinated use of various structures, the first secondary drill bit, the second secondary drill bit, and the third secondary drill bit rotate on the crushing disc to achieve the function of differential cutting and drilling. Moreover, the third secondary drill bit and the reinforcing frame are installed on the outer side of the crushing disc through the bevel edge, enabling the third secondary drill bit to be inclined, which is conducive to synchronous and efficient cutting of hard and soft rock formations. The structure on the crushing disc performs secondary cutting on the residual rock ridge in the drilling direction during the crushing and mining process, effectively offsetting the torque fluctuation of the crushing disc and reducing the stick-slip effect of the crushing disc. Driven by the servo motor, the gear rotates, the gear drives the gear ring to rotate, and then the spiral bar can rotate. The traction force generated by the rotation of the spiral bar through the spiral groove enables the reinforcing block to displace in the guide groove, realizing the function of adjusting the positions of each reinforcing block, enabling each crushing rod and the extension angle to converge or diverge towards the center point of the crushing disc, realizing the function of adjusting the hole diameter, and adapting to different operation requirements without replacing the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings required for use in some embodiments. Obviously, the drawings in the following description are only the drawings of some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limitations on the actual dimensions of the products, the actual processes of the methods, the actual timings of the signals, etc. involved in the embodiments of the present disclosure.

[0018] Figure 1 It is the front view of the overall structure of the present invention.

[0019] Figure 2 It is the side view of the excavation component of the present invention.

[0020] Figure 3 It is the three-dimensional view of the crushing disc and the abutting block of the present invention.

[0021] Figure 4 It is the three-dimensional view of the reinforcing frame and the third secondary drill bit of the present invention.

[0022] Figure 5 It is the three-dimensional view of the reinforcing ring, the spiral bar, the gear ring, the reinforcing block, the crushing rod, and the extension angle of the present invention.

[0023] Figure 6 For the present invention Figure 5 exploded view.

[0024] Figure 7 It is the three-dimensional view of the reinforcing cylinder, the limiting rod, the inner lining cylinder, and the second connecting ring of the present invention.

[0025] Figure 8 It is the cross-sectional view of the overall structure of the present invention.

[0026] Figure 9 This is a three-dimensional view of the reinforcement cylinder, connecting plate, first connecting ring, limiting rod and second connecting ring of the present invention.

[0027] The reference numerals are: 1, reinforcement cylinder; 2, connecting plate; 3, crushing disc; 4, inner lining cylinder; 5, guide groove; 6, reinforcement block; 7, crushing rod; 8, extended angle; 9, reinforcement ring; 10, spiral strip; 11, spiral groove; 12, gear ring; 13, servo motor; 14, gear; 15, first connecting ring; 16, limiting rod; 17, second connecting ring; 18, first installation groove; 19, first sub-bit; 20, second installation groove; 21, second sub-bit; 22, third installation groove; 23, reinforcement frame; 24, third sub-bit; 25, abutting block. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As shown in the attached Figure 1 - Figure 9 A bit device for coal mine excavation shown in the figure realizes the function of differential cutting drilling through the excavation assembly provided on the reinforcement cylinder 1. The first sub-bit 19, the second sub-bit 21 and the third sub-bit 24 rotate on the crushing disc 3. The third sub-bit 24 and the reinforcement frame 23 are installed on the outside of the crushing disc 3 through the bevel edge, so that the third sub-bit 24 can be inclined, which is easy to cut the hard and soft rock layers synchronously and efficiently. The structure on the crushing disc 3 performs secondary cutting on the residual rock ridge in the drilling direction during the crushing and mining process, and also effectively offsets the torque fluctuation of the crushing disc 3 and reduces the stick-slip effect of the crushing disc 3. Driven by the servo motor 13, the gear 14 rotates, and the gear 14 drives the gear ring 12 to rotate. Then, the spiral strip 10 can rotate. The reinforcement block 6 can displace in the guide groove 5 through the traction force generated when the spiral strip 10 rotates through the spiral groove 11, realizing the function of adjusting the positions of the respective reinforcement blocks 6, so that the respective crushing rods 7 and extended angles 8 can converge or diverge towards the center point of the crushing disc 3, realizing the function of adjusting the hole diameter, and can adapt to different operation requirements without replacing the bit. And the specific structure of the assembly is as follows;

[0030] The excavation assembly includes a connecting plate 2 provided at one end of the reinforcement cylinder 1. A crushing disc 3 is provided on one side of the connecting plate 2, and an inner lining cylinder 4 is provided between the connecting plate 2 and the crushing disc 3;

[0031] On the side of the inner lining cylinder 4 facing the reinforcing cylinder body 1, a second connecting ring 17 is fixedly arranged. A number of guiding grooves 5 are penetrated and opened between the second connecting ring 17 and the inner lining cylinder 4. And a reinforcing block 6 is slidably connected in each guiding groove 5. One ends of a plurality of reinforcing blocks 6 are all threadedly connected with a crushing rod 7. And on one side of each reinforcing block 6, an extended angle 8 is fixedly arranged. The extended angle 8 extends to the outside of the crushing disc 3. Between the connecting plate 2 and the second connecting ring 17, a reinforcing ring 9 is arranged. A first connecting ring 15 is rotatably connected on the reinforcing ring 9. The first connecting ring 15 is fixed at the end of the reinforcing cylinder body 1. On the side of the reinforcing ring 9 facing the reinforcing block 6, a spiral strip 10 is fixedly arranged. The spiral strip 10 extends to the spiral groove 11 and is slidably connected with the spiral groove 11. In the middle of the reinforcing ring 9, a toothed ring 12 is fixedly arranged. Inside the servo motor 13, the servo motor 13 is installed through bolts. At the output end of the servo motor 13, a gear 14 is arranged. The gear 14 is meshed with the toothed ring 12;

[0032] The inner lining cylinder 4 is fixedly connected with the crushing disc 3 and the connecting plate 2 through bolts. A number of limiting rods 16 are fixedly arranged on the outside of the reinforcing cylinder body 1. And one end of each limiting rod 16 extends to the outside of the inner lining cylinder 4 and is detachably connected with the inner lining cylinder 4 through bolts. A first installation groove 18 is opened in the middle of the crushing disc 3. A number of first auxiliary drills 19 are rotatably connected in the first installation groove 18. A number of second installation grooves 20 are arranged on the outside of the first installation groove 18. And each second installation groove 20 is opened on the surface of the crushing disc 3. A number of second auxiliary drills 21 are rotatably connected in a plurality of second installation grooves 20. And each second installation groove 20 is circumferentially distributed along the center point of the crushing disc 3. An inclined edge is opened on the outside of the crushing disc 3. The inclined edge is arranged to incline upwards. A number of third installation grooves 22 are penetrated and opened on the inclined edge. A reinforcing frame 23 is embedded in a plurality of third installation grooves 22. And a third auxiliary drill 24 is rotatably connected in each reinforcing frame 23. On the inner walls of the reinforcing frame 23, the second installation groove 20 and the first installation groove 18, a resisting block 25 is fixedly arranged. And each resisting block 25 extends to the outside of the first auxiliary drill 19, the second auxiliary drill 21 and the third auxiliary drill 24 respectively.

[0033] When in use according to the above structure, the staff installs the device on the roadheader. The power system on the roadheader drives the rotation of the reinforcement cylinder 1. When the reinforcement cylinder 1 rotates, it drives the rotation of the connecting plate 2 and the crushing disc 3. When the crushing disc 3 rotates, it drives the rotation of multiple first auxiliary drills 19, second auxiliary drills 21, and third auxiliary drills 24 to crush and excavate the coal mine. At the same time, the third auxiliary drill 24, the second auxiliary drill 21, and the first auxiliary drill 19 can also rotate in the first installation groove 18, the second installation groove 20, and the reinforcement frame 23 respectively, which is conducive to the rotation of the first auxiliary drill 19, the second auxiliary drill 21, and the third auxiliary drill 24 on the crushing disc 3, realizing the function of differential cutting and drilling. Moreover, the third auxiliary drill 24 and the reinforcement frame 23 are installed on the outer side of the crushing disc 3 through the hypotenuse, so that the third auxiliary drill 24 can be inclined, which is conducive to the synchronous and efficient cutting of hard and soft rock formations;

[0034] And through the reinforcement blocks 6, extended angles 8, and crushing rods 7 on the outer side of the inner lining cylinder 4, it is convenient for the structure on the crushing disc 3 to perform secondary cutting on the residual rock ridge in the drilling direction during the crushing and mining process, and effectively offsets the torque fluctuation of the crushing disc 3 and reduces the stick-slip effect of the crushing disc 3;

[0035] At the same time, the servo motor 13 drives the gear 14 to rotate. The gear 14 drives the gear ring 12 to rotate, and then the spiral bar 10 can rotate. The traction force generated by the rotation of the spiral bar 10 through the spiral groove 11 enables the reinforcement block 6 to displace in the guide groove 5, realizing the function of adjusting the positions of the reinforcement blocks 6, so that each crushing rod 7 and extended angle 8 can converge or diverge towards the center point of the crushing disc 3, realizing the function of adjusting the hole diameter, adapting to different operation requirements without replacing the drill bit, and the servo motor 13 can be powered on through the electric slip ring or battery to facilitate the rotation of the servo motor 13 driving the gear 14.

[0036] Different from the prior art, the present application discloses a drill bit device for coal mine excavation. By rotating the first auxiliary drill 19, the second auxiliary drill 21, and the third auxiliary drill 24 on the crushing disc 3, the function of differential cutting and drilling is realized. Moreover, the third auxiliary drill 24 and the reinforcement frame 23 are installed on the outer side of the crushing disc 3 through the hypotenuse, so that the third auxiliary drill 24 can be inclined, which is conducive to the synchronous and efficient cutting of hard and soft rock formations. The structure on the crushing disc 3 performs secondary cutting on the residual rock ridge in the drilling direction during the crushing and mining process, and effectively offsets the torque fluctuation of the crushing disc 3 and reduces the stick-slip effect of the crushing disc 3. The servo motor 13 drives the gear 14 to rotate. The gear 14 drives the gear ring 12 to rotate, and then the spiral bar 10 can rotate. The traction force generated by the rotation of the spiral bar 10 through the spiral groove 11 enables the reinforcement block 6 to displace in the guide groove 5, realizing the function of adjusting the positions of the reinforcement blocks 6, so that each crushing rod 7 and extended angle 8 can converge or diverge towards the center point of the crushing disc 3, realizing the function of adjusting the hole diameter, and adapting to different operation requirements without replacing the drill bit.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drill bit device for coal mining, comprising a reinforced cylinder (1), characterized in that: The reinforced cylinder (1) is provided with an excavation assembly; The excavation assembly comprises a connecting plate (2) arranged at one end of the reinforcing cylinder (1), a crushing disk (3) is arranged on one side of the connecting plate (2), and an inner lining cylinder (4) is arranged between the connecting plate (2) and the crushing disk (3); A second connecting ring (17) is fixedly provided on the side of the inner liner (4) facing the reinforcing cylinder body (1), and a plurality of guide grooves (5) are provided between the second connecting ring (17) and the inner liner (4), and a reinforcing block (6) is slidably connected in each of the guide grooves (5), and one end of each of the reinforcing blocks (6) is threadedly connected to a crushing rod (7), and an extension angle (8) is fixedly provided on one side of each of the reinforcing blocks (6), and the extension angle (8) extends to the outside of the crushing disk (3).

2. The drill bit device for coal mine excavation according to claim 1, characterized in that: A reinforcing ring (9) is provided between the connecting plate (2) and the second connecting ring (17), and a first connecting ring (15) is rotatably connected to the reinforcing ring (9), wherein the first connecting ring (15) is fixed to the end of the reinforcing cylinder (1).

3. The drill bit device for coal mining according to claim 2, characterized in that: A spiral strip (10) is fixedly provided on the side of the reinforcement ring (9) facing the reinforcement block (6), and the spiral strip (10) extends to the spiral groove (11) and is slidably connected to the spiral groove (11).

4. The drill bit device for coal mine excavation according to claim 2, characterized in that: A gear ring (12) is fixedly arranged in the middle of the reinforcing ring (9), a servo motor (13) is installed inside the servo motor (13) by means of bolts, a gear (14) is arranged at the output end of the servo motor (13), and the gear (14) is meshed with the gear ring (12).

5. The drill bit device for coal mine excavation according to claim 1, characterized in that: The inner liner (4) is fixedly connected to the crushing disc (3) and the connecting plate (2) by bolts, and a plurality of limit rods (16) are fixedly provided on the outer side of the reinforcing cylinder (1), and one end of each of the limit rods (16) extends to the outer side of the inner liner (4) and is detachably connected to the inner liner (4) by bolts.

6. The drill bit device for coal mine excavation according to claim 1, characterized in that: A first mounting groove (18) is provided in the middle of the crushing disc (3), and a plurality of first auxiliary drill bits (19) are rotatably connected in the first mounting groove (18).

7. The drill bit device for coal mine excavation according to claim 6, characterized in that: A plurality of second mounting grooves (20) are arranged outside the first mounting groove (18), and each of the second mounting grooves (20) is opened on the surface of the crushing disk (3), a second auxiliary drill bit (21) is rotatably connected in each of the plurality of second mounting grooves (20), and each of the second mounting grooves (20) is distributed along the circumference of the axis center point of the crushing disk (3).

8. The drill bit device for coal mine excavation according to claim 1, characterized in that: The outer side of the crushing disk (3) is provided with a bevel, the bevel is arranged to be inclined upward, and a plurality of third installation grooves (22) are provided through the bevel.

9. The drill bit device for coal mine excavation according to claim 8, characterized in that: A reinforcement frame (23) is embedded in each of the plurality of third installation grooves (22), and a third auxiliary drill bit (24) is rotatably connected in each of the reinforcement frames (23).

10. The drill bit device for coal mine excavation according to claim 9, characterized in that: The inner walls of the reinforcement frame (23), the second installation groove (20) and the first installation groove (18) are all fixedly provided with a resistance block (25), and each of the resistance blocks (25) extends to the outside of the first auxiliary drill bit (19), the second auxiliary drill bit (21) and the third auxiliary drill bit (24).

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