Diamond compact drill bit convenient to maintain

Abstract

The invention discloses a diamond compact drill bit convenient to maintain, and particularly relates to the field of drill bits, the diamond compact drill bit comprises a threaded rod, one end of the threaded rod is provided with a drill bit seat, one end of the drill bit seat is provided with three wing seats in an array mode, one side of each wing seat is fixedly connected with a first blade, and the top of the drill bit seat is provided with two second blades; three slag discharging grooves are formed in the top of the drill bit base in an array mode, and the slag discharging grooves and the wing bases are staggered. According to the invention, the wing seat can be independently replaced after the first blade is damaged through the cooperation of the mounting insertion block and the mounting insertion groove, and the second blade can be independently replaced when being damaged through the cooperation of the quadrangular prism and the quadrangular groove, and the disassembly can be completed only by rotating one mounting screw rod during replacement; and when threads on the surface of the threaded rod are damaged, only the threaded rod can be replaced, so that the cost is reduced, resources are saved, the influence on the coal mining efficiency can be reduced, and the use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of drill bits, and more particularly to a diamond composite drill bit which is easy to maintain. Background Art

[0002] In coal mining operations, the drill bit of the coal mining machine is a key rock-breaking tool. Diamond composite drill bits have been widely used in the field of coal mining due to their excellent wear resistance and cutting performance. Diamond composite drill bits consist of a drill body and a diamond composite sheet embedded in the drill body. The diamond composite sheet is sintered by diamond micropowder and cemented carbide substrate under high temperature and high pressure, combining the high hardness and high wear resistance of diamond with the high strength and impact resistance of cemented carbide.

[0003] Traditional diamond composite drill bits are mostly integral structures. When working, the drill bits need to withstand huge impact and friction forces, and the working environment is harsh, which makes the drill bits relatively prone to damage. Once the diamond composite pieces are worn, chipped, or some parts inside the drill bit fail, the entire drill bit often needs to be replaced, which will not only extend the interruption time of coal mining operations and reduce production efficiency, but also increase the workload and labor intensity of maintenance personnel. This not only causes a waste of resources, but also greatly increases mining costs, which may affect the normal production order of coal mines and even bring safety hazards. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a diamond composite drill bit that is easy to maintain, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a diamond composite drill bit that is easy to maintain, comprising a threaded rod, a drill seat is arranged at one end of the threaded rod, three wing seats are arranged in an array at one end of the drill seat, a first blade is fixedly connected to one side of the wing seat, the first blade is supported by the wing seat, and coal can be drilled by the first blade during rotation, two second blades are arranged on the top of the drill seat, and coal dislocated in the middle wing seat can be drilled by the second blade, three slag discharge grooves are arranged in an array on the top of the drill seat, the slag discharge grooves are dislocated with the wing seat, and the coal drilled by the first blade and the second blade can be guided and discharged through the slag discharge grooves;

[0006] The top of the drill seat is provided with a mounting slot at a position corresponding to the wing seat, and the bottom of the wing seat is fixedly connected with a mounting plug. Through the cooperation of the mounting slot and the mounting plug, the wing seat can be conveniently disassembled and installed, and the wing seat can be conveniently replaced when the first blade is worn and needs maintenance, and the combined strength of the wing seat is improved. A mounting screw is inserted in the middle of the mounting plug, and the installation of the mounting plug can be fixed by the mounting screw. The bottom of the second blade is fixedly connected with a quadrangular prism, and the top of the drill seat is provided with a quadrangular groove corresponding to the quadrangular prism. The quadrangular prism is inserted into the interior of the quadrangular groove, and one end of the mounting screw can be inserted into the interior of the quadrangular prism to fix the position of the quadrangular prism, and the cooperation of the quadrangular prism and the quadrangular groove facilitates the disassembly and replacement of the second blade. A combined fixing structure for convenient disassembly and connection is provided between the threaded rod and the drill seat. Through the combined fixing structure, the threaded rod and the drill seat can be conveniently combined and disassembled, and the threaded rod can be conveniently replaced after disassembly when the thread on the surface of the threaded rod is damaged, thereby improving the use effect and improving the connection strength after the combined fixation.

[0007] In a preferred embodiment, a first through hole is provided in the middle of the threaded rod, a second through hole is provided in the middle of the drill bit seat, drainage holes are provided in the center of the top of the drill bit seat and in the middle of the slag discharge groove, and the inner cavity of the drainage hole is connected with the second through hole in the middle of the drill bit seat. Liquid can be injected into the interior of the drill bit seat through the connection between the first through hole and the second through hole, so as to facilitate slag discharge while flushing and cooling during drilling, and the drilled coal can be conveniently discharged for use through the slag discharge groove.

[0008] In a preferred embodiment, the slag discharge groove is configured as an arc structure, one end of the first blade and the second blade are both provided with diamond material, a bevel is provided on the side of the wing seat away from the first blade, and the cross-sectional shape of the drill seat is configured as a trumpet-shaped structure. Through the cooperation of the second blade and the first blade, it is convenient to drill coal and improve the drilling hardness, and the slag discharge is convenient through the slag discharge groove.

[0009] In a preferred embodiment, one side of the mounting block is matched with the outer surface of the drill bit seat, the mounting block is matched with the mounting slot, the mounting block is arranged in the middle of the mounting slot, and a threaded hole is opened in the middle of the mounting slot. After the mounting block is installed, the integrity of the outer surface of the drill bit seat is improved, and the support strength of the wing seat is improved through the drill bit seat, and the threaded hole is used to facilitate installation and connection.

[0010] In a preferred embodiment, the quadrangular prism is arranged in the middle of the quadrangular groove, and a screw hole is opened on one side of the quadrangular prism, and the screw hole and the threaded hole are both adapted to the mounting screw, and one end of the mounting screw passes through the threaded hole and extends to the inside of the screw hole, and the two sides of the mounting plug block and the two sides of the inner cavity of the mounting slot are adapted to be provided with limiting grooves and limiting slides, and the mounting screw passes through the mounting plug block and the inside of the threaded hole and then is inserted into the inside of the screw hole, and the installation of the quadrangular prism and the mounting plug block can be fixed by the mounting screw, which is convenient for combined connection and use, and improves the use effect, and the limiting grooves and limiting slides are provided to improve the connection strength between the wing seat and the drill bit seat.

[0011] In a preferred embodiment, the combined fixing mechanism includes a mounting groove opened inside the bottom end of the drill bit seat, a plurality of positioning slides are fixedly connected to the middle of the mounting groove, fixing mechanisms are arranged on three sides of the inner cavity of the mounting groove, a mounting head is fixedly connected to the top of the threaded rod, and a positioning slide and a fixing slot are opened on the outside of the mounting head.

[0012] In a preferred embodiment, the mounting head is adapted to the mounting groove, the mounting head is arranged inside the mounting groove, the positioning groove corresponds one-to-one to the positioning slide bar, the positioning slide bar is arranged inside the positioning groove, the fixing slot corresponds one-to-one to the fixing mechanism, and the bottom wall of the inner cavity of the fixing slot is set as an inclined surface. Through the cooperation of the mounting head and the mounting groove, it is convenient to combine and connect the threaded rod and the drill bit seat, and through the cooperation of the positioning groove and the positioning slide bar, the connection and limiting effect of the threaded rod and the drill bit seat is improved, so that the fixing mechanism corresponds to the fixing slot, which is convenient for fixing the threaded rod and the drill bit seat.

[0013] In a preferred embodiment, the fixing mechanism includes a screw head groove opened on the outside of the drill bit seat and a first limiting groove inside the mounting groove, the screw head groove corresponds to the first limiting groove, the first limiting groove corresponds to the fixed slot, and a movable plate and a fixed plug block are arranged in the middle of the first limiting groove, and the bottom wall of the fixed plug block is arranged as an inclined surface and is adapted to the bottom wall of the inner cavity of the fixed slot.

[0014] In a preferred embodiment, the movable plate and the fixed block are adapted to the first limit slot, the fixed block is arranged on a side of the movable plate close to the fixed slot, an adjusting screw is inserted in the middle of the screw head slot, the adjusting screw passes through the middle of the movable plate and the fixed block, the fixed block is slidingly connected to the adjusting screw, the movable plate is threadedly connected to the adjusting screw, a limit plate is sleeved in the middle of the adjusting screw, the limit plate is arranged in the middle of the first limit slot, and the limit plate is arranged on a side of the movable plate away from the fixed block.

[0015] In a preferred embodiment, the movable plate is fixedly connected to one side of the fixed plug block, and one end of the movable plate is fixedly connected to a sliding block, and one side of the fixed plug block is provided with two second limiting grooves, and the middle part of the second limiting groove is fixedly connected to a stabilizing rod, and the sliding block is arranged in the middle part of the second limiting groove, and the stabilizing rod passes through the middle part of the sliding block and is slidably connected to the sliding block. By pushing the movable plate and the fixed plug block by the curved plate, one end of the fixed plug block can be moved out from the inside of the first limiting groove, so that the installation head squeezes the fixed plug block when the installation head is inserted into the installation groove, until the fixed plug block corresponds to the fixed slot, the fixed plug block is automatically inserted into the inside of the fixed slot, thereby limiting the installation head, and controlling the movable plate to squeeze the curved plate by rotating the adjusting screw until the fixed plug block is fixed in the middle part of the fixed slot, which can improve the fixing effect, thereby facilitating the replacement and installation of the threaded rod when the thread on the surface of the threaded rod is damaged, and facilitating the combined and disassembled use;

[0016] When in use, the threaded rod and the drill bit seat generate thrust and rotational force, and the force direction of the combined connection is different from the force direction generated during use, so the connection structure will not be damaged during use, and thus the overall use strength will not be affected.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The present invention firstly cooperates with the installation plug block and the installation slot to replace the wing seat separately after the first blade is damaged, and cooperates with the quadrangular prism and the quadrangular groove to replace the second blade separately when it is damaged. When replacing, only one installation screw rod needs to be rotated to complete the disassembly, which is convenient for quick maintenance and replacement. When the thread on the surface of the threaded rod is damaged, only the threaded rod can be replaced, which reduces costs and saves resources, and can reduce the impact on coal mining efficiency, which is convenient for use.

[0019] 2. The present invention also improves the connection strength between the installation block and the installation slot by cooperating the setting installation block and the installation slot through the limiting slide groove and the limiting slide bar, facilitates the chip removal through the slag removal groove, and can position the installation of the installation head through the cooperation of the positioning slide bar and the positioning slide groove, so that the fixed slot corresponds to the fixed block, which is convenient for the positioning and combined installation of the threaded rod and the drill seat;

[0020] 3. The present invention also pushes the movable plate and the fixed plug block through the arc plate, so that the fixed plug block can generate a force to automatically insert into the fixed slot when installing the threaded rod, which is convenient for initial positioning. The movable plate can be rotated to control the extrusion of the movable plate to achieve fixation and avoid loose connection. When installing and replacing the threaded rod, the adjusting screw will not fall off or be lost, thereby improving the use effect.

[0021] In summary, through the mutual influence of the above-mentioned multiple effects, it is convenient to replace each part separately when it is damaged, which is convenient for rapid repair and replacement, thereby reducing costs and saving resources, and can reduce the impact on coal mining efficiency, making it convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the threaded rod structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the disassembled structure of the drill seat, the wing seat and the second blade of the present invention.

[0026] Figure 5 It is a schematic diagram of the cross-sectional split structure of the drill bit holder of the present invention.

[0027] Figure 6 For the present invention Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0028] Figure 7 It is a schematic diagram of the disassembled structure of the stabilizer bar and the fixed insert block of the present invention.

[0029] The accompanying drawings are marked as follows: 1. threaded rod; 2. drill bit seat; 3. wing seat; 4. first blade; 5. second blade; 6. slag discharge groove; 7. mounting slot; 8. mounting plug block; 9. quadrangular prism; 10. quadrangular groove; 11. threaded hole; 12. mounting screw; 13. screw hole; 14. mounting head; 15. positioning slide groove; 16. fixing slot; 17. mounting slot; 18. positioning slide bar; 19. drainage hole; 20. screw head groove; 21. first limiting groove; 22. movable plate; 23. fixing plug block; 24. arc plate; 25. slider; 26. second limiting groove; 27. stabilizing rod; 28. adjusting screw. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] As attached Figure 1-7A diamond composite drill bit that is easy to maintain is shown, comprising a threaded rod 1, a drill seat 2 is arranged at one end of the threaded rod 1, three wing seats 3 are arranged in an array at one end of the drill seat 2, a first blade 4 is fixedly connected to one side of the wing seat 3, the first blade 4 is supported by the wing seat 3, and coal can be drilled by the first blade 4 during rotation, two second blades 5 are arranged on the top of the drill seat 2, and coal dislocated by the middle wing seat 3 can be drilled by the second blade 5, and three slag discharge grooves 6 are arranged in an array on the top of the drill seat 2, the slag discharge grooves 6 and the wing seat 3 are dislocated with each other, and the coal drilled by the first blade 4 and the second blade 5 can be guided and discharged through the slag discharge grooves 6;

[0032] A mounting slot 7 is provided at the top of the drill seat 2 at a position corresponding to the wing seat 3, and a mounting plug 8 is fixedly connected to the bottom of the wing seat 3. The mounting slot 7 and the mounting plug 8 cooperate to facilitate the disassembly and installation of the wing seat 3, and to facilitate the replacement of the wing seat 3 when the first blade 4 is worn and needs repair, and to improve the combined strength of the wing seat 3. A mounting screw 12 is inserted in the middle of the mounting plug 8, and the mounting plug 8 can be fixed by the mounting screw 12. A quadrangular prism 9 is fixedly connected to the bottom of the second blade 5, and a quadrangular groove corresponding to the quadrangular prism 9 is provided on the top of the drill seat 2 10, the quadrangular prism 9 can be inserted into the quadrangular groove 10, and one end of the mounting screw 12 can be inserted into the quadrangular prism 9 to fix the position of the quadrangular prism 9, and the cooperation between the quadrangular prism 9 and the quadrangular groove 10 can facilitate the disassembly and replacement of the second blade 5, and a combined fixing structure for convenient disassembly and connection is provided between the threaded rod 1 and the drill seat 2. Through the combined fixing structure, the threaded rod 1 and the drill seat 2 can be conveniently combined and disassembled, and the threaded rod 1 can be conveniently replaced after disassembly when the surface thread of the threaded rod 1 is damaged, thereby improving the use effect and improving the connection strength after the combined fixation.

[0033] As attached Figure 1-5As shown, a first through hole is provided in the middle of the threaded rod 1, a second through hole is provided in the middle of the drill seat 2, a drainage hole 19 is provided at the top center position of the drill seat 2 and in the middle of the slag discharge groove 6, the inner cavity of the drainage hole 19 is connected with the second through hole in the middle of the drill seat 2, the slag discharge groove 6 is arranged in an arc structure, one end of the first blade 4 and the second blade 5 are both provided with diamond material, a bevel is provided on the side of the wing seat 3 away from the first blade 4, and the cross-sectional shape of the drill seat 2 is arranged in a trumpet-shaped structure. One side of the mounting block 8 is matched with the outer surface of the drill seat 2, and the mounting block 8 is matched with the mounting slot 7. The mounting block 8 is arranged in the middle of the mounting slot 7, and a threaded hole 11 is opened in the middle of the mounting slot 7. The quadrangular prism 9 is arranged in the middle of the quadrangular groove 10, and a screw hole 13 is opened on one side of the quadrangular prism 9. The screw hole 13 and the threaded hole 11 are both matched with the mounting screw 12. One end of the mounting screw 12 passes through the threaded hole 11 and extends to the inside of the screw hole 13. The two ends of the mounting block 8 are connected to the mounting screw 12. The side and the inner cavity of the mounting slot 7 are adapted to be provided with a limiting slide groove and a limiting slide bar, which are connected through the first through hole and the second through hole, and liquid can be injected into the interior of the drill bit seat 2, so as to facilitate the flushing and cooling during drilling and the slag discharge, and the slag discharge groove 6 can be used to conveniently discharge the drilled coal. Through the cooperation of the second blade 5 and the first blade 4, it is convenient to drill coal and improve the drilling hardness, and the slag discharge groove 6 is used to facilitate the slag discharge. After the installation of the mounting block 8, the integrity of the outer surface of the drill bit seat 2 is improved, and the support strength of the wing seat 3 is improved through the drill bit seat 2. The threaded hole 11 is convenient for installation and connection. The mounting screw 12 passes through the mounting block 8 and the inside of the threaded hole 11 and then is inserted into the inside of the screw hole 13. The installation of the quadrangular prism 9 and the mounting block 8 can be fixed by the mounting screw 12, which is convenient for combined connection and use, and improves the use effect. The connection strength of the wing seat 3 and the drill bit seat 2 is improved by the provided limiting slide groove and limiting slide bar.

[0034] As attached Figure 1 , 2, 3, 5, 6, and 7, the combined fixing mechanism includes a mounting groove 17 opened inside the bottom end of the drill bit seat 2, a plurality of positioning slides 18 are fixedly connected to the middle of the mounting groove 17, and fixing mechanisms are arranged on three sides of the inner cavity of the mounting groove 17, a mounting head 14 is fixedly connected to the top of the threaded rod 1, a positioning slide 15 and a fixing slot 16 are opened on the outside of the mounting head 14, the mounting head 14 is adapted to the mounting groove 17, the mounting head 14 is arranged inside the mounting groove 17, the positioning slide 15 corresponds to the positioning slide 18 one by one, the positioning slide 18 is arranged inside the positioning slide 15, the fixing slot 16 corresponds to the fixing mechanism one by one, the inner cavity bottom wall of the fixing slot 16 is arranged as an inclined surface, the fixing mechanism includes a screw head groove 20 and a mounting groove opened on the outside of the drill bit seat 2 The first limiting groove 21 inside the groove 17, the screw head groove 20 corresponds to the first limiting groove 21, the first limiting groove 21 corresponds to the fixed slot 16, the middle of the first limiting groove 21 is provided with a movable plate 22 and a fixed plug block 23, the bottom wall of the fixed plug block 23 is provided with an inclined surface and is adapted to the bottom wall of the inner cavity of the fixed slot 16, the movable plate 22 and the fixed plug block 23 are adapted to the first limiting groove 21, the fixed plug block 23 is provided on the side of the movable plate 22 close to the fixed slot 16, an adjusting screw 28 is inserted in the middle of the screw head groove 20, the adjusting screw 28 passes through the middle of the movable plate 22 and the fixed plug block 23, the fixed plug block 23 is slidably connected with the adjusting screw 28, the movable plate 22 is threadedly connected with the adjusting screw 28, and the middle of the adjusting screw 28 is sleeved with a limiting The positioning plate, the limiting plate is arranged in the middle of the first limiting groove 21, the limiting plate is arranged on the side of the movable plate 22 away from the fixed plug block 23, the movable plate 22 is fixedly connected to the side of the fixed plug block 23 with two arc plates 24, one end of the arc plate 24 is fixedly connected with a slider 25, one side of the fixed plug block 23 is provided with two second limiting grooves 26, the middle part of the second limiting groove 26 is fixedly connected with a stabilizing rod 27, the slider 25 is arranged in the middle part of the second limiting groove 26, the stabilizing rod 27 passes through the middle part of the slider 25 and is slidably connected to the slider 25, through the cooperation of the mounting head 14 and the mounting groove 17, it is convenient to combine and connect the threaded rod 1 and the drill seat 2, and through the cooperation of the positioning slide groove 15 and the positioning slide bar 18, the connection and limiting effect of the threaded rod 1 and the drill seat 2 is improved. The fixing mechanism is made to correspond to the fixing slot 16, which is convenient for fixing the threaded rod 1 and the drill seat 2. The arc plate 24 pushes the movable plate 22 and the fixed plug block 23, so that one end of the fixed plug block 23 can be moved out from the inside of the first limiting groove 21, so that the installation head 14 is inserted into the installation groove 17 to squeeze the fixed plug block 23 until the fixed plug block 23 corresponds to the fixed slot 16, and the fixed plug block 23 is automatically inserted into the fixed slot 16, thereby limiting the installation head 14, and the movable plate 22 is controlled to squeeze the arc plate 24 by rotating the adjusting screw 28 until the fixed plug block 23 is fixed in the middle of the fixed slot 16, which can improve the fixing effect, so that it is convenient to replace and install the threaded rod 1 when the surface thread of the threaded rod 1 is damaged.Convenient for combination and splitting;

[0035] When in use, the threaded rod 1 and the drill seat 2 generate thrust and rotational force, and the force direction of the combined connection is different from the force direction generated during use, so the connection structure will not be damaged during use, and thus the overall strength of use will not be affected.

[0036] Working principle of the present invention: when the threaded rod 1 needs to be replaced, the adjusting screw 28 is rotated to control the movable plate 22 to drive the fixed plug 23 to move to the side away from the fixed slot 16 through the arc plate 24 until the fixed plug 23 is moved out of the fixed slot 16, so that the threaded rod 1 and the drill seat 2 can be easily disassembled, thereby replacing the threaded rod 1;

[0037] The positioning slide groove 15 corresponds to the positioning slide bar 18, so that the mounting head 14 is conveniently inserted into the mounting groove 17. By rotating the adjusting screw 28 to squeeze the movable plate 22, the fixing plug 23 can be fixed inside the fixing slot 16 to fix the threaded rod 1, thereby completing the combined fixing of the threaded rod 1 and the drill seat 2.

[0038] When the second blade 5 and the wing seat 3 need to be disassembled and replaced, it is only necessary to rotate the mounting screw 12 to remove the mounting screw 12, and the second blade 5 can drive the quadrangular column 9 to move out from the inside of the quadrangular groove 10, and pull the wing seat 3 to slide the mounting plug 8 out of the inside of the mounting slot 7, so that the damaged wing seat 3 and the second blade 5 can be disassembled and replaced, which is convenient for maintenance and use;

[0039] When in use, liquid is injected into the second through hole through the first through hole and sprayed out through the drainage hole 19, which facilitates flushing and heat dissipation while driving the broken slag to be discharged through the slag discharge groove 6, making it convenient for slag discharge.

[0040] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the case of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0041] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A diamond composite drill bit that is easy to maintain, characterized in that: The invention comprises a threaded rod (1), one end of which is provided with a drill seat (2), one end of which is provided with three wing seats (3) in an array, one side of which is fixedly connected with a first blade (4), the top of which is provided with two second blades (5), and the top of which is provided with three slag discharge grooves (6), wherein the slag discharge grooves (6) are mutually offset from the wing seats (3); A mounting slot (7) is provided at a position on the top of the drill seat (2) corresponding to the wing seat (3); a mounting plug block (8) is fixedly connected to the bottom of the wing seat (3); a mounting screw (12) is inserted in the middle of the mounting plug block (8); a quadrangular prism (9) is fixedly connected to the bottom of the second blade (5); a quadrangular groove (10) corresponding to the quadrangular prism (9) is provided on the top of the drill seat (2); and a combined fixing structure for convenient disassembly and connection is provided between the threaded rod (1) and the drill seat (2).

2. The diamond composite drill bit that is easy to maintain according to claim 1, characterized in that: A first through hole is provided in the middle of the threaded rod (1), a second through hole is provided in the middle of the drill seat (2), a drainage hole (19) is provided in the middle of the top of the drill seat (2) and in the middle of the slag discharge groove (6), and the inner cavity of the drainage hole (19) is connected to the second through hole in the middle of the drill seat (2).

3. The diamond composite drill bit that is easy to maintain according to claim 1, characterized in that: The slag discharge groove (6) is configured as an arc-shaped structure, one end of the first blade (4) and the second blade (5) are both provided with a diamond material, a bevel is provided on the side of the wing seat (3) away from the first blade (4), and the cross-sectional shape of the drill seat (2) is configured as a trumpet-shaped structure.

4. The diamond composite drill bit that is easy to maintain according to claim 1, characterized in that: One side of the mounting block (8) is matched with the outer surface of the drill seat (2), the mounting block (8) is matched with the mounting slot (7), the mounting block (8) is arranged in the middle of the mounting slot (7), and a threaded hole (11) is opened in the middle of the mounting slot (7).

5. The diamond composite drill bit that is easy to maintain according to claim 1, characterized in that: The quadrangular prism (9) is arranged in the middle of the quadrangular groove (10), and a screw hole (13) is opened on one side of the quadrangular prism (9). The screw hole (13) and the threaded hole (11) are both adapted to the mounting screw rod (12). One end of the mounting screw rod (12) passes through the threaded hole (11) and extends to the inside of the screw hole (13). The two sides of the mounting block (8) are adapted to the two sides of the inner cavity of the mounting slot (7) to be provided with limit grooves and limit slide bars.

6. The diamond composite drill bit that is easy to maintain according to claim 1, characterized in that: The combined fixing mechanism comprises a mounting groove (17) provided inside the bottom end of the drill bit seat (2), a plurality of positioning slide bars (18) being fixedly connected to the middle of the mounting groove (17), fixing mechanisms being arranged on three sides of the inner cavity of the mounting groove (17), a mounting head (14) being fixedly connected to the top of the threaded rod (1), and a positioning slide groove (15) and a fixing slot (16) being provided on the outside of the mounting head (14).

7. The diamond composite drill bit that is easy to maintain according to claim 6, characterized in that: The mounting head (14) is adapted to the mounting groove (17), the mounting head (14) is arranged inside the mounting groove (17), the positioning slide groove (15) corresponds one-to-one with the positioning slide bar (18), the positioning slide bar (18) is arranged inside the positioning slide groove (15), the fixing slot (16) corresponds one-to-one with the fixing mechanism, and the inner cavity bottom wall of the fixing slot (16) is arranged as an inclined surface.

8. The diamond composite drill bit that is easy to maintain according to claim 6, characterized in that: The fixing mechanism comprises a screw head groove (20) provided outside the drill bit seat (2) and a first limiting groove (21) inside the mounting groove (17), the screw head groove (20) and the first limiting groove (21) corresponding to each other, the first limiting groove (21) corresponding to the fixing slot (16), a movable plate (22) and a fixing plug (23) being provided in the middle of the first limiting groove (21), the bottom wall of the fixing plug (23) being provided as an inclined surface and being adapted to the bottom wall of the inner cavity of the fixing slot (16).

9. The diamond composite drill bit that is easy to maintain according to claim 8, characterized in that: The movable plate (22) and the fixed plug block (23) are adapted to the first limiting groove (21); the fixed plug block (23) is arranged on a side of the movable plate (22) close to the fixed slot (16); an adjusting screw (28) is inserted in the middle of the screw head slot (20); the adjusting screw (28) passes through the middle of the movable plate (22) and the fixed plug block (23); the fixed plug block (23) is slidably connected to the adjusting screw (28); the movable plate (22) is threadedly connected to the adjusting screw (28); a limiting disk is sleeved in the middle of the adjusting screw (28); the limiting disk is arranged in the middle of the first limiting groove (21); and the limiting disk is arranged on a side of the movable plate (22) away from the fixed plug block (23).

10. The diamond composite drill bit that is easy to maintain according to claim 8, characterized in that: Two arc-shaped plates (24) are fixedly connected to one side of the movable plate (22) close to the fixed plug block (23); one end of the arc-shaped plate (24) is fixedly connected to a slider (25); one side of the fixed plug block (23) is provided with two second limiting grooves (26); the middle of the second limiting groove (26) is fixedly connected to a stabilizing rod (27); the slider (25) is arranged in the middle of the second limiting groove (26); the stabilizing rod (27) passes through the middle of the slider (25) and is slidably connected to the slider (25).

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