Efficient drilling bit for mine drilling machine

Abstract

The utility model provides an efficient drill bit for a mine drilling machine, which belongs to the technical field of drill bits and comprises a drill rod and a drill bit body arranged on the drill rod, a flange ring is mounted on the outer wall of one end of the drill rod, and a fixing seat is arranged at one end of the drill rod. According to the utility model, the crushing teeth arranged on the drill bit body are matched with the buffer springs, so that the positions of the crushing teeth can be effectively and automatically adjusted according to the hardness of external rocks and the drilling pressure, thereby reducing greater abrasion of the crushing teeth caused by hard rocks or abnormal loads, prolonging the service life of the drill bit, and improving the drilling efficiency at the same time; the spiral blade arranged outside the drill rod close to one end of the mounting seat continuously lifts the waste drilling fluid between the drill rod and the well wall in the process of synchronously rotating along with the drill rod, so that rock debris can be quickly and effectively removed from a drill hole, and the rock debris is prevented from being accumulated at the bottom of a drill bit to reduce the rock breaking efficiency; meanwhile, friction between the drill bit and rock is reduced, abrasion of the drill bit is reduced, and the drilling effect of the drill bit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, and more specifically, to an efficient drilling bit for a mine drill rig. Background Art

[0002] Mine equipment mainly refers to the general term for various mining, screening, transportation and other special equipment used in the production processes of various mines such as coal, ferrous metals and non-ferrous metals. During the mine exploitation process, a drill rig is one of the important equipment, which is used for drilling holes to place explosives and the like.

[0003] In the prior art, drill bits are usually made of cemented carbide materials to enhance their wear resistance. However, the structure of the end of the traditional drill bit is relatively single, the drilling efficiency is low, and at the same time, the rock chips broken at the end cannot be discharged in time and will accumulate at the bottom of the well and come into secondary contact with the drill bit, which will accelerate the wear of the drill bit, and the excessive accumulation of rock chips at the bottom of the well will hinder the drilling of the drill bit, resulting in a decrease in the drilling speed, thereby reducing the overall drilling efficiency. How to invent an efficient drilling bit for a mine drill rig to solve these problems has become an urgent problem for those skilled in the art. Summary of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides an efficient drilling bit for a mine drill rig, aiming at the problem that the traditional drill bit cannot discharge rock chips in time, thereby reducing the overall drilling efficiency.

[0005] The utility model is implemented as follows:

[0006] The utility model provides an efficient drilling bit for a mine drill rig, including a drill pipe and a drill bit body arranged on the drill pipe. A flange ring is installed on the outer wall of one end of the drill pipe, a fixed seat is arranged at one end of the drill pipe, and three mounting seats are installed at one end of the fixed seat;

[0007] One end of the drill bit body is installed with a rotating shaft rotatably connected to the inner wall of the mounting seat. A plurality of buffer grooves are formed on the outer wall of the drill bit body, a buffer spring is arranged on the inner wall of the buffer groove, and a crushing tooth is installed at one end of the buffer spring.

[0008] Preferably, the drill pipe is installed on the shaft body of the drill rig through the flange ring. Bearings for connecting with the rotating shaft are installed on the inner wall of the mounting seat, and a plurality of rolling-connected balls are installed on the inner wall of the mounting seat.

[0009] Preferably, both side walls of both ends of the buffer spring are fixedly connected to the inner wall of the buffer groove and one end of the crushing tooth respectively, and the outer wall of the crushing tooth is slidably connected to the inner wall of the buffer groove.

[0010] By adopting the above technical solution, during the process of drilling holes by rotating and moving the drill pipe, while the multiple drill bit bodies at one end rotate along with the drill pipe, the crushing teeth on the outer side roll and crush the rock blocks and simultaneously rotate themselves under the delayed reaction force to improve the crushing effect. The buffer spring cooperates with the crushing teeth to automatically adjust the position according to the rock hardness and drilling pressure, thereby reducing the wear of the crushing teeth under hard rocks or abnormal loads and increasing the service life.

[0011] Preferably, a frustum-shaped arc-shaped slope is provided at one end of the mounting seat, and a drilling fluid hole penetrating the fixing seat is provided on the drill pipe.

[0012] Preferably, the drill bit body is conical, and a plurality of equally spaced annular grooves are provided on the outer wall of the drill bit body.

[0013] Preferably, the inner diameters of the annular grooves are different, and the design of the plurality of annular grooves enables the crushing teeth on the drill bit body to be distributed in a stepped manner.

[0014] Preferably, a spiral blade is installed on the outer wall of the drill pipe, and the blade cross-sectional thickness of the spiral blade gradually decreases from the outer wall of the drill pipe outwards.

[0015] By adopting the above technical solution, during the drilling process, the drilling fluid is sprayed towards the drill bit body through the drilling fluid hole, effectively cooling the drill bit body and reducing wear. At the same time, the drilling fluid carries a large amount of cuttings and is discharged from the bottom of the drill bit towards the drill pipe under the action of pressure, avoiding the accumulation of cuttings at the bottom of the drill bit and reducing the rock-breaking efficiency. At the same time, the friction between the drill bit and the rock is reduced, the wear of the drill bit is decreased, and the spiral blade rotates along with the drill pipe to increase the discharge speed of the cuttings, further reducing the wear of the drill bit.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The crushing teeth provided on the drill bit body cooperate with the buffer spring to effectively automatically adjust the position of the crushing teeth according to the external rock hardness and drilling pressure, thereby reducing the large wear of the crushing teeth under hard rocks or abnormal loads, increasing the service life of the drill bit while improving the drilling efficiency. The spiral blade provided on the outer part of the drill pipe near one end of the mounting seat continuously lifts the waste drilling fluid between the drill pipe and the well wall during the synchronous rotation process with the drill pipe, and can quickly and effectively remove the cuttings from the drill hole, avoiding the accumulation of cuttings at the bottom of the drill bit and reducing the rock-breaking efficiency. At the same time, the friction between the drill bit and the rock is reduced, the wear of the drill bit is decreased, and further the drilling effect of the drill bit is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of an efficient drilling bit for a mine drill provided by an embodiment of the present utility model;

[0020] Figure 2 is a half-sectional view of the structure of an efficient drilling bit for a mine drill provided by an embodiment of the present utility model;

[0021] Figure 3 is the structure of an efficient drilling bit for a mine drill provided by an embodiment of the present utility model Figure 2 enlarged view of the structure of area A in;

[0022] Figure 4 is a schematic diagram of a partial structure of an efficient drilling bit for a mine drill provided by an embodiment of the present utility model;

[0023] Figure 5 is a half-sectional view of a partial structure of an efficient drilling bit for a mine drill provided by an embodiment of the present utility model;

[0024] Figure 6 is the structure of an efficient drilling bit for a mine drill provided by an embodiment of the present utility model Figure 5 enlarged view of the structure of area B in.

[0025] In the figure: 1, drill pipe; 2, flange ring; 3, fixed seat; 4, drilling fluid hole; 5, slope; 6, mounting seat; 7, ball; 8, drill bit body; 9, rotating shaft; 10, annular groove; 11, buffer groove; 12, buffer spring; 13, crushing teeth; 14, spiral blade. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0027] Example, refer to Figures 1 - 3, A high-efficiency drilling bit for a mine drill, including a drill pipe 1 and a bit body 8 provided on the drill pipe 1. A flange ring 2 is installed on the outer wall of one end of the drill pipe 1. A fixed seat 3 is provided at one end of the drill pipe 1, and three mounting seats 6 are installed at one end of the fixed seat 3;

[0028] A rotating shaft 9 rotatably connected to the inner wall of the mounting seat 6 is installed at one end of the bit body 8. A plurality of buffer grooves 11 are formed on the outer wall of the bit body 8. A buffer spring 12 is provided on the inner wall of the buffer groove 11, and a crushing tooth 13 is installed at one end of the buffer spring 12;

[0029] Furthermore; the drill pipe 1 is installed on the shaft body of the drill through the flange ring 2. Bearings connected to the rotating shaft 9 are installed on the inner wall of the mounting seat 6. A plurality of rolling-connected balls 7 are installed on the inner wall of the mounting seat 6. The two side walls of both ends of the buffer spring 12 are respectively fixedly connected to the inner wall of the buffer groove 11 and one end of the crushing tooth 13, and the outer wall of the crushing tooth 13 is slidably connected to the inner wall of the buffer groove 11.

[0030] It should be noted that: the shaft body of the drill drives the entire drill pipe 1 to rotate, and at the same time, it continuously moves towards the inner wall of the mine during the movement to drill holes. A plurality of bit bodies 8 provided at one end of the drill pipe 1 break the rocks below downward to complete the drilling. At the same time, during the rotation of the drill pipe 1, the bit body 8 rotates automatically under the pressure of the rock surface, so that each bit body 8 rotates independently, improving the drilling effect. A number of crushing teeth 13 provided on the outside of the bit cooperate to roll and crush the rocks, making them into smaller rock chips for subsequent cleaning. In addition, the buffer spring 12 provided at one end of the crushing tooth 13 effectively automatically adjusts the position of the crushing tooth 13 according to the external rock hardness and drilling pressure, thereby reducing the large wear of the crushing tooth 13 under hard rocks or abnormal loads and increasing the service life of the bit.

[0031] Furthermore; a frustum-shaped arc-shaped slope 5 is provided at one end of the mounting seat 6. A drilling fluid hole 4 penetrating the fixed seat 3 is provided on the drill pipe 1. The bit body 8 is conical. A plurality of equally spaced ring grooves 10 are formed on the outer wall of the bit body 8. The inner diameters of the ring grooves 10 are different. The design of the plurality of ring grooves 10 makes the crushing teeth 13 on the bit body 8 distributed in a stepped manner. A spiral blade 14 is installed on the outer wall of the drill pipe 1, and the blade cross-sectional thickness of the spiral blade 14 gradually decreases from the outer wall of the drill pipe 1 outwards.

[0032] It should be noted that during the drilling process, one end of the drilling fluid hole 4 is connected to the pipeline outside the drill pipe 1, and the drilling fluid is sprayed at high pressure through the drilling fluid hole 4 towards the drill bit body 8 by a high-pressure pump, so as to cool the drill bit body 8, reduce the wear of the drill bit, and thus extend the service life of the drill bit. At the same time, the drilling fluid carries the cuttings at the end of the drill bit and returns the cuttings to the ground through the annulus between the drill pipe 1 and the wellbore, which can effectively remove the cuttings from the borehole, avoid the accumulation of cuttings at the bottom of the drill bit and reduce the rock-breaking efficiency, and at the same time reduce the friction between the drill bit and the rock and reduce the wear of the drill bit. The arc-shaped slope 5 provided guides the drilling fluid carrying the cuttings back to the ground to improve the efficiency of cuttings cleaning. In addition, the spiral blade 14 provided outside the drill pipe 1 near one end of the mounting seat 6 rotates synchronously with the drill pipe 1, and continuously lifts the waste drilling fluid between the drill pipe 1 and the wellbore during the rotation process, improving the cleaning speed of the cuttings, thereby improving the drilling effect of the entire drill bit. At the same time, the spiral blade 14 with a gradually decreasing cross-sectional thickness increases the hardness of the end face and reduces wear during the transportation of cuttings to maintain the transportation effect.

[0033] The working principle of this efficient drilling bit for a mine drill:

[0034] The drill shaft drives the entire drill pipe 1 to rotate, and at the same time, it continuously moves towards the inner wall of the mine for drilling during the movement. Multiple drill bit bodies 8 provided at one end of the drill pipe 1 break the rock below downwards to complete the drilling. At the same time, during the rotation of the drill pipe 1, the drill bit body 8 rotates automatically under the pressure of the rock surface, so that each drill bit body 8 rotates independently. Several crushing teeth 13 provided outside the drill bit cooperate to roll and crush the rock. At the same time, the external high-pressure pump is turned on to spray the drilling fluid at high pressure through the drilling fluid hole 4 towards the drill bit body 8, so as to cool the drill bit body 8. At the same time, the drilling fluid carries the cuttings at the end of the drill bit. In addition, the spiral blade 14 provided outside the drill pipe 1 near one end of the mounting seat 6 rotates synchronously with the drill pipe 1, and continuously lifts the waste drilling fluid between the drill pipe 1 and the wellbore during the rotation process, and returns the cuttings to the ground through the annulus between the drill pipe 1 and the wellbore, avoiding the accumulation of cuttings at the bottom of the drill bit and reducing the rock-breaking efficiency, and at the same time reducing the friction between the drill bit and the rock and reducing the wear of the drill bit, thereby improving the drilling effect of the entire drill bit.

[0035] It should be noted that the specific model and specification of the motor need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An efficient drilling bit for a mine drill, comprising a drill pipe (1) and a bit body (8) provided on the drill pipe (1), characterized in that, One end of the outer wall of the drill pipe (1) is provided with a flange ring (2). One end of the drill pipe (1) is provided with a fixed seat (3), and three mounting seats (6) are installed at one end of the fixed seat (3). One end of the drill bit body (8) is provided with a rotating shaft (9) rotatably connected to the inner wall of the mounting seat (6). A plurality of buffer grooves (11) are formed in the outer wall of the drill bit body (8). A buffer spring (12) is arranged on the inner wall of the buffer groove (11), and a crushing tooth (13) is installed at one end of the buffer spring (12).

2. The high-efficiency drilling bit for a mine drill according to claim 1, wherein, The drill pipe (1) is installed on the shaft body of the drilling rig through the flange ring (2). Bearings connected to the rotating shaft (9) are installed on the inner wall of the mounting seat (6), and a plurality of rolling-connected balls (7) are installed on the inner wall of the mounting seat (6).

3. The high-efficiency drilling bit for a mine drill according to claim 2, characterized in that, Both side walls of both ends of the buffer spring (12) are fixedly connected to the inner wall of the buffer groove (11) and one end of the crushing tooth (13) respectively, and the outer wall of the crushing tooth (13) is slidably connected to the inner wall of the buffer groove (11).

4. The high-efficiency drilling bit for a mine drill according to claim 1, characterized in that, A frustum-shaped arc-shaped slope (5) is formed at one end of the mounting seat (6), and a drilling fluid hole (4) penetrating the fixed seat (3) is formed in the drill pipe (1).

5. The high-efficiency drilling bit for a mine drill according to claim 4, characterized in that, The drill bit body (8) is conical, and a plurality of equidistant annular grooves (10) are formed in the outer wall of the drill bit body (8).

6. The high-efficiency drilling bit for a mine drill according to claim 5, characterized in that, The inner diameters of the annular grooves (10) are different, and the design of the plurality of annular grooves (10) enables the crushing teeth (13) on the drill bit body (8) to be distributed in a stepped manner.

7. The high-efficiency drilling bit for a mine drill according to claim 6, wherein, A spiral blade (14) is installed on the outer wall of the drill pipe (1), and the cross-sectional thickness of the blade of the spiral blade (14) gradually decreases from the outer wall of the drill pipe (1) outwards.

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