Wear-resistant high-strength composite drill bit structure

Abstract

The invention relates to the technical field of drill bits, and provides a wear-resistant high-strength composite drill bit structure which comprises a drill bit body and a welding block. A welding block is fixed to the outer side of the drill bit body, blades are installed in the welding block, cutting teeth are installed on the outer sides of the blades, and a cavity is formed in the drill bit body. By arranging an anti-blocking structure, when water flows into a water outlet hole, an impeller is driven to rotate when the water flows, a connecting shaft is driven to rotate when the impeller rotates, an eccentric disc is driven to rotate when the connecting shaft rotates, and when the eccentric disc rotates, a movable shaft can be driven to move under the guidance of a guide sleeve through matched use with a connecting frame; and an ejection ring at the top end of the moving shaft is driven to reciprocate up and down, so that the interior of the water outlet hole is blocked. When the drill bit body works, blocked objects can be ejected out, the water outlet hole is kept smooth, the situation that the temperature of the drill bit body is too high during working is prevented, and therefore the anti-blocking work of the water outlet hole is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of drill bits, and particularly relates to a wear-resistant high-strength composite drill bit structure. Background Art

[0002] Mining drill bits are key tools used in mining and geological exploration. Their main function is to break rocks through rotation and impact force. The working principle of mining drill bits is mainly based on rotation and impact force. The cutting part at the front end of the drill bit (such as cone bits, diamond particles or cutting teeth) cuts and breaks rocks, while the flushing fluid (such as water, mud) is injected into the drill pipe and enters the rock formation through the holes in the drill bit to reduce friction, cool the drill bit and remove rock debris. During the drilling process, a large amount of frictional heat is generated between the drill bit and the rock. Traditional drill bits are generally provided with water outlet holes to introduce flushing fluid (such as water or mud) to cool the drill bit and prevent the drill bit from being damaged due to overheating. This helps to extend the service life of the drill bit and improve its working efficiency.

[0003] However, during the long-term operation of traditional drill bits, it is very easy for the water outlet holes to be blocked during the mining process, resulting in the inability to discharge the cooling water to cool the drill bit, and causing the drill bit to be damaged due to overheating during the long-term operation. Therefore, a wear-resistant high-strength composite drill bit structure is needed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a wear-resistant high-strength composite drill bit structure to solve the defect that the water outlet holes of the existing drill bits are easily blocked during the mining process, resulting in the inability to discharge the cooling water to cool the drill bit, and causing the drill bit to be damaged due to overheating during the long-term operation.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A wear-resistant high-strength composite drill bit structure, including a drill bit body and a welding block; a welding block is fixed on the outer side of the drill bit body, a cutter wing is installed inside the welding block, cutting teeth are installed on the outer side of the cutter wing, and a cavity is opened inside the drill bit body;

[0006] A connecting head is installed at the bottom end of the drill bit body, a water outlet hole is opened at the middle position inside the drill bit body, and an anti-blocking structure is arranged inside the water outlet hole. The anti-blocking structure includes a fixed sleeve fixed inside the water outlet hole, a connecting shaft is installed at the middle position of the fixed sleeve, an impeller is installed at the bottom end of the connecting shaft, an eccentric disk is installed at the top end of the connecting shaft, a guide sleeve is fixed on one side inside the water outlet hole, a moving shaft is installed inside the guide sleeve, a top ring is fixed at the top end of the moving shaft, and a connecting frame is arranged on one side of the bottom end of the moving shaft.

[0007] Preferably, an installation hole is formed inside the fixed sleeve, a ball is installed inside the installation hole, the balls are in rolling connection with each other inside the installation hole, a first limiting sleeve is fixed to the outer side of the connection shaft at the top position of the fixed sleeve, and a second limiting sleeve is fixed to the outer side of the connection shaft at the bottom position of the fixed sleeve.

[0008] Preferably, a plurality of groups of balls are provided, and the plurality of groups of balls are annularly distributed inside the fixed sleeve.

[0009] Preferably, the inner diameter of the guiding sleeve is larger than the outer diameter of the moving shaft, and a guiding structure is formed between the guiding sleeve and the moving shaft.

[0010] Preferably, a plurality of connecting blocks are fixed to the outer side of the fixed sleeve, and the plurality of connecting blocks and the inside of the water outlet hole are integrally formed by welding.

[0011] Preferably, a disassembly and assembly structure is provided inside the welding block. The disassembly and assembly structure includes an installation groove formed inside the welding block, a through groove is formed inside the cutter blade, and a screw is installed inside the installation groove.

[0012] Preferably, an external thread is provided on the outer side of the screw, an internal thread is provided on the inner side of the installation groove, and a threaded connection is formed between the screw and the installation groove.

[0013] Preferably, the through groove is formed at both ends inside the cutter blade, and a through connection is formed between the screw and the installation groove.

[0014] Preferably, a plurality of cutting teeth are provided, and the plurality of cutting teeth are arranged at equal intervals on the outer side of the cutter blade.

[0015] Preferably, a plurality of welding blocks are provided, and the plurality of welding blocks and the drill bit body are integrally formed by welding.

[0016] The advantages of a wear-resistant high-strength composite drill bit structure provided by the present invention are as follows:

[0017] By providing an anti-blocking structure, when water flows through the water outlet hole, the flowing water will drive the impeller to rotate. When the impeller rotates, it will drive the connection shaft to rotate. When the connection shaft rotates, it will drive the eccentric disc to rotate. When the eccentric disc rotates, through the cooperation with the connection frame, it can drive the moving shaft to move up and down reciprocally under the guidance of the guiding sleeve, driving the ejecting ring at the top of the moving shaft. Thus, when the water outlet hole is blocked, the blocked object can be ejected to keep the water outlet hole unobstructed, preventing the drill bit body from overheating during operation, thereby completing the anti-blocking work of the water outlet hole;

[0018] Furthermore, when the connecting shaft rotates inside the fixed sleeve, it drives the balls to roll inside the mounting holes, thereby reducing the friction between the connecting shaft and the inside of the fixed sleeve when the connecting shaft rotates inside the fixed sleeve, thus achieving the effect of reducing friction.

[0019] By providing a disassembly and assembly structure, in order to prevent the need to disassemble the drill bit body for repair when a set of cutting blades is severely worn, thus through the combined use of the screw, the through slot, and the mounting slot, when a set of mounting slots is worn, the worn cutting blades can be disassembled and replaced, eliminating the need to disassemble the entire drill bit body for repair when a set of mounting slots is worn, thereby improving convenience.

[0020] Furthermore, the material of the cutting teeth is polycrystalline diamond composite sheets, which have high hardness, good wear resistance, good toughness, heat resistance, and corrosion resistance, thereby improving the wear resistance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a front three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 is a bottom three-dimensional structural schematic diagram of the present invention;

[0023] Figure 3 is a bottom sectional three-dimensional structural schematic diagram of the present invention;

[0024] Figure 4 is a front partial sectional three-dimensional structural schematic diagram of the present invention;

[0025] Figure 5 is a front sectional three-dimensional structural schematic diagram of the present invention;

[0026] Figure 6 is a front three-dimensional structural schematic diagram of the anti-blocking structure of the present invention;

[0027] Figure 7 is a bottom three-dimensional structural schematic diagram of the anti-blocking structure of the present invention;

[0028] Figure 8 is a front sectional three-dimensional structural schematic diagram of the anti-blocking structure of the present invention;

[0029] Figure 9 is of the present invention Figure 5 local enlarged three-dimensional structural schematic diagram at A;

[0030] Figure 10 is of the present invention Figure 8 local enlarged three-dimensional structural schematic diagram at B.

[0031] Description of the reference numerals in the figures: 1. Drill bit body; 2. Welding block; 3. Blade; 4. Cutting tooth; 5. Water outlet hole; 6. Connector; 7. Cavity; 8. Anti-blocking structure; 801. Fixed sleeve; 802. Impeller; 803. First limiting sleeve; 804. Connecting shaft; 805. Moving shaft; 806. Guide sleeve; 807. Ejecting ring; 808. Connecting frame; 809. Eccentric disc; 8010. Second limiting sleeve; 8011. Mounting hole; 8012. Ball; 9. Disassembly and assembly structure; 901. Screw; 902. Through groove; 903. Mounting groove. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 - 10 , a wear-resistant high-strength composite drill bit structure provided by the present invention includes a drill bit body 1 and a welding block 2; a welding block 2 is fixed on the outer side of the drill bit body 1, a blade 3 is installed inside the welding block 2, a cutting tooth 4 is installed on the outer side of the blade 3, and a cavity 7 is formed inside the drill bit body 1;

[0034] A connector 6 is installed at the bottom end of the drill bit body 1, a water outlet hole 5 is formed at the middle position inside the drill bit body 1, and an anti-blocking structure 8 is arranged inside the water outlet hole 5.

[0035] Refer to Figures 1 - 10As shown: The anti-blocking structure 8 includes a fixed sleeve 801 fixed inside the water outlet hole 5. A connecting shaft 804 is installed at the middle position of the fixed sleeve 801. An impeller 802 is installed at the bottom end of the connecting shaft 804. An eccentric disc 809 is installed at the top end of the connecting shaft 804. A guide sleeve 806 is fixed on one side inside the water outlet hole 5. A moving shaft 805 is installed inside the guide sleeve 806. A top ring 807 is fixed at the top end of the moving shaft 805. A connecting frame 808 is arranged on one side of the bottom end of the moving shaft 805. An installation hole 8011 is opened inside the fixed sleeve 801. A ball 8012 is installed inside the installation hole 8011. The balls 8012 form a rolling connection inside the installation hole 8011. A first limit sleeve 803 is fixed on the outside of the connecting shaft 804 at the top end position of the fixed sleeve 801. A second limit sleeve 8010 is fixed on the outside of the connecting shaft 804 at the bottom end position of the fixed sleeve 801. Multiple groups of balls 8012 are provided. The multiple groups of balls 8012 are annularly distributed inside the fixed sleeve 801. The inner diameter of the guide sleeve 806 is larger than the outer diameter of the moving shaft 805. A guiding structure is formed between the guide sleeve 806 and the moving shaft 805. Multiple connecting blocks are fixed on the outside of the fixed sleeve 801. The multiple connecting blocks and the inside of the water outlet hole 5 form a welded integration.

[0036] Specifically, in this embodiment, when the drill bit body 1 is installed on the drill pipe for work, cooling water will flow inside the water outlet hole 5 to cool the drill bit body 1 and prevent the drill bit body 1 from being damaged due to excessive temperature. When the cooling water sprays and flows inside the water outlet hole 5, the cooling water will drive the impeller 802 to rotate. When the impeller 802 rotates, it will drive the connecting shaft 804 to rotate. When the connecting shaft 804 rotates inside the fixed sleeve 801, it will drive the balls 8012 to rotate inside the installation hole 8011, thereby reducing the friction between the connecting shaft 804 and the fixed sleeve 801 during rotation and achieving the effect of reducing friction.

[0037] When the connecting shaft 804 rotates, it will drive the eccentric disc 809 to rotate. When the eccentric disc 809 rotates, through the cooperation with the connecting frame 808, it will drive the moving shaft 805 to move up and down inside the guide sleeve 806. At this time, the use of the guide sleeve 806 can guide the moving shaft 805 to make the moving shaft 805 move more stably during up and down movement. When the moving shaft 805 moves up and down, it will also drive the top ring 807 to move up and down inside the water outlet hole 5, and can push out the blocked object when the water outlet hole 5 is blocked, keeping the water outlet hole 5 unobstructed, thereby completing the anti-blocking work of the water outlet hole 5.

[0038] Refer to Figures 1 - 10As shown in the figure: An assembly and disassembly structure 9 is provided inside the welding block 2. The assembly and disassembly structure 9 includes an installation groove 903 opened inside the welding block 2. A through groove 902 is opened inside the cutter blade 3. A screw rod 901 is installed inside the installation groove 903. An external thread is provided on the outer side of the screw rod 901, and an internal thread is provided on the inner side of the installation groove 903. A threaded connection is formed between the screw rod 901 and the installation groove 903. The through groove 902 is opened at both ends inside the cutter blade 3. A through connection is formed between the screw rod 901 and the installation groove 903. Multiple groups of cutting teeth 4 are provided, and the multiple groups of cutting teeth 4 are arranged at equal intervals on the outer side of the cutter blade 3. Multiple groups of welding blocks 2 are provided, and an integrated welding is formed between the multiple groups of welding blocks 2 and the drill bit body 1.

[0039] Specifically, in this embodiment, when the drill bit body 1 works for a long time and it is found that a group of cutter blades 3 are severely worn and need to be repaired, at this time, the screw rod 901 is taken out from the inside of the installation groove 903, and then a new cutter blade 3 is installed in the original place, and the cutter blade 3 is fixed through the cooperation between the screw rod 901 and the installation groove 903. There is no need to disassemble the entire drill bit body 1 for repair when a group of cutter blades 3 are worn, thereby improving the convenience.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. 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 wear-resistant high-strength composite drill bit structure, characterized by: It comprises a drill bit body (1) and a welding block (2); A welding block (2) is fixed on the outside of the drill bit body (1), a blade (3) is installed inside the welding block (2), a cutting tooth (4) is installed on the outside of the blade (3), and a cavity (7) is opened inside the drill bit body (1); A connector (6) is installed at the bottom end of the drill bit body (1), a water outlet (5) is opened at a middle position inside the drill bit body (1), an anti-blocking structure (8) is arranged inside the water outlet (5), and the anti-blocking structure (8) comprises a fixing sleeve (801) fixed inside the water outlet (5), a connecting shaft (804) is installed at a middle position of the fixing sleeve (801), an impeller (802) is installed at the bottom end of the connecting shaft (804), an eccentric disk (809) is installed at the top end of the connecting shaft (804), a guide sleeve (806) is fixed on one side inside the water outlet (5), a movable shaft (805) is installed inside the guide sleeve (806), an ejection ring (807) is fixed on the top end of the movable shaft (805), and a connecting frame (808) is arranged on one side of the bottom end of the movable shaft (805).

2. The wear-resistant high-strength composite drill bit structure according to claim 1, characterized in that: The fixing sleeve (801) is provided with a mounting hole (8011) inside, and a ball (8012) is installed inside the mounting hole (8011). The ball (8012) forms a rolling connection inside the mounting hole (8011). The connecting shaft (804) is fixed with a first limiting sleeve (803) on the outside of the top end of the fixing sleeve (801), and the connecting shaft (804) is fixed with a second limiting sleeve (8010) on the outside of the bottom end of the fixing sleeve (801).

3. The wear-resistant high-strength composite drill bit structure according to claim 2, characterized in that: The balls (8012) are provided in a plurality of groups, and the plurality of groups of balls (8012) are distributed in a ring shape inside the fixing sleeve (801).

4. The wear-resistant high-strength composite drill bit structure according to claim 1, characterized in that: The inner diameter of the guide sleeve (806) is greater than the outer diameter of the movable shaft (805), and a guide structure is formed between the guide sleeve (806) and the movable shaft (805).

5. The wear-resistant high-strength composite drill bit structure according to claim 1, characterized in that: A plurality of connection blocks are fixed to the outside of the fixing sleeve (801), and the plurality of connection blocks are welded integrally with the inside of the water outlet hole (5).

6. The wear-resistant high-strength composite drill bit structure according to claim 1, characterized in that: The welding block (2) is provided with a disassembly and assembly structure (9), the disassembly and assembly structure (9) comprises a mounting groove (903) provided inside the welding block (2), a through groove (902) is provided inside the blade (3), and a screw rod (901) is installed inside the mounting groove (903).

7. The wear-resistant high-strength composite drill bit structure according to claim 6, characterized in that: The outer side of the screw rod (901) is provided with an external thread, and the inner side of the installation groove (903) is provided with an internal thread, so that a threaded connection is formed between the screw rod (901) and the installation groove (903).

8. The wear-resistant high-strength composite drill bit structure according to claim 6, characterized in that: The through grooves (902) are formed at two ends inside the blade wing (3), and a through connection is formed between the screw rod (901) and the mounting groove (903).

9. The wear-resistant high-strength composite drill bit structure according to claim 1, characterized in that: The cutting teeth (4) are provided in multiple groups, and the multiple groups of cutting teeth (4) are arranged at equal intervals on the outer side of the blade (3).

10. The wear-resistant high-strength composite drill bit structure according to claim 1, characterized in that: The welding blocks (2) are provided in multiple groups, and the multiple groups of welding blocks (2) and the drill bit body (1) are welded together to form an integrated whole.

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