Rotary drum drill bit convenient to disassemble

Abstract

The utility model relates to the technical field of rotary drum drill bits, and discloses a rotary drum drill bit convenient to disassemble, which comprises a rotary drum flange and a rotary drum body, the rotary drum body is arranged on one side of the rotary drum flange, a drill bit joint is arranged at one end of the rotary drum body, and a drill bit main body is arranged at one end of the drill bit joint. Due to the fact that the drill bit connector and the drill bit body are connected through the wedge-shaped structure and are matched with a plurality of sets of fixing pin shafts, stable connection can be guaranteed, quick disassembly can be facilitated, replacement and maintenance are facilitated, and meanwhile the drill bit connector and the drill bit body are convenient to use. The first water groove, the water guide hole and the second water groove are formed in the inner wall of the rotary drum flange, the inner wall of the rotary drum body and the inner wall of the drill bit connector correspondingly and communicate with one another to form an annular water path, cooling liquid can be effectively conveyed in the drilling process, a drill bit is cooled and lubricated, abrasion is reduced, the service life is prolonged, the drilling efficiency and quality are improved, and the construction cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rotary drill bit technology, specifically a rotary drill bit that is easy to disassemble. Background Technology

[0002] Rotary drill bits, generally referring to cylindrical drill bits, are key tools for drilling in complex geological formations using rotary drilling rigs and other equipment. They are mostly cylindrical in shape, and their core function is to assist drilling by cutting annular grooves. In hard bedrock, large boulders, or permafrost, directly using auger drill bits can easily damage the equipment. However, cylindrical drill bits can first cut out annular grooves, and then be used in conjunction with auger drill bits or sand-retrieving drill bits to complete the drilling, improving efficiency and reducing wear. Depending on the geological formation, cylindrical drill bits are divided into cutter-type and roller-type. Cutter-type bits are suitable for weathered soft rock and permafrost, while roller-type bits are designed for hard bedrock and large boulders. Their design, through optimized cutting structure, achieves breakthroughs in adaptability to highly challenging geological formations, making them important technical equipment in pile foundation construction.

[0003] Rotary drill bits are key tools for drilling operations, and their performance directly affects construction efficiency and quality. However, existing drill bits typically use welding to fix their components. If a component is damaged, the entire drill bit often needs to be replaced. This is especially problematic when frequent drill bit replacements are required to adapt to different geological conditions, severely impacting construction progress. Furthermore, during high-speed drilling, the drill bit generates a large amount of heat due to intense friction with rocks and other media. If this heat is not cooled in time, the drill bit temperature will rise sharply, accelerating wear, reducing its hardness and strength, and shortening its service life. Existing drill bits usually rely on external spray cooling, which is uneven and cannot reach critical internal parts of the drill bit, making it difficult to meet the needs of long-term, high-intensity drilling operations. Utility Model Content

[0004] The purpose of this invention is to provide a rotary drill bit that is easy to disassemble, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rotary drill bit that is easy to disassemble, comprising a rotary flange and a rotary body, wherein the rotary body is installed on one side of the rotary flange and a drill bit connector is installed at one end of the rotary body;

[0006] The drill bit body is installed at one end of the drill bit connector, and the connection ends of the drill bit connector and the drill bit body are both wedge-shaped structures. The drill bit connector and the inner wall of the drill bit body are connected to multiple sets of fixing pins.

[0007] The first water tank is formed on the inner wall of the rotary flange. The inner wall of the rotary body has multiple sets of water guide holes. The inner wall of the drill bit joint has a second water tank. The inner walls of the second water tank and the first water tank are connected to the inner walls of the water guide holes. The second water tank and the first water tank are both annular in shape.

[0008] Preferably, the inner wall of the rotary flange is provided with multiple sets of water injection holes and mounting holes, and the inner wall of the water injection holes is connected to the inner wall of the first water tank.

[0009] Preferably, the inner wall of the drill bit connector has multiple sets of water outlet holes, and the inner wall of the water outlet holes is connected to the inner wall of the second water tank.

[0010] Preferably, the outer side of the drill bit body has multiple sets of mounting grooves, the inner wall of the mounting groove is fitted with a gauge strip, and the outer side of the gauge strip is interference-fitted with the inner wall of the mounting groove. Drill teeth are fixed at one end of the drill bit body.

[0011] Preferably, the inner wall of the drill bit connector has multiple sets of first pin holes, and the inner wall of the drill bit body has multiple sets of second pin holes, and the inner walls of the first pin holes and the second pin holes are inserted into the outer side of the fixed pin shaft.

[0012] Preferably, the inner wall of the drill bit body has multiple sets of first threaded holes, and the inner wall of the first threaded holes is threaded with fixing bolts.

[0013] Preferably, the inner wall of the drill bit connector has multiple sets of second threaded holes, and the inner wall of the second threaded holes is threadedly connected to the outer side of the fixing bolt.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model uses a wedge-shaped structure to connect the drill bit joint and the drill bit body, and is equipped with multiple sets of fixing pins. This ensures a stable connection and facilitates quick disassembly, replacement, and maintenance. At the same time, the inner walls of the rotary flange, rotary body, and drill bit joint are respectively provided with a first water groove, a water guide hole, and a second water groove, which are interconnected to form an annular water channel. This can effectively deliver coolant during drilling to cool and lubricate the drill bit, reduce wear, extend service life, improve drilling efficiency and quality, and reduce construction costs. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the easily disassembled rotary drill bit provided by this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the drill bit body provided by this utility model;

[0018] Figure 3A schematic diagram of the drill bit connector structure provided by this utility model;

[0019] Figure 4 A schematic diagram of the rotating drum body structure provided by this utility model;

[0020] Figure 5 A schematic diagram of the water guide hole structure provided by this utility model;

[0021] Figure 6 A schematic diagram of the first water tank structure provided by this utility model;

[0022] Figure 7 A schematic diagram of the water injection hole structure provided by this utility model.

[0023] In the diagram: 1. Rotary drum flange; 2. Rotary drum body; 3. Drill bit connector; 4. Drill bit body; 5. Fixing pin; 6. First water tank; 7. Water guide hole; 8. Second water tank; 9. Water injection hole; 10. Mounting hole; 11. Water outlet hole; 12. Mounting groove; 13. Gauge retaining strip; 14. Drill teeth; 15. First pin hole; 16. Second pin hole; 17. Fixing bolt; 18. First threaded hole; 19. Second threaded hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-7 As shown, a rotary drill bit that is easy to disassemble includes a rotary flange 1 and a rotary body 2. The rotary body 2 is installed on one side of the rotary flange 1, and a drill bit connector 3 is installed at one end of the rotary body 2.

[0026] The rotary flange 1 serves as the basic connecting component of the entire drill bit system, providing installation support for the rotary body 2. It is used to connect the drill bit to equipment such as the drilling rig, and to transmit the torque and axial force applied by the drilling rig, enabling the drill bit to work normally. The rotary body 2 is designed to further transmit the torque and axial force transmitted by the rotary flange 1 to the drill bit connector 3. The drill bit connector 3, with one end connected to the rotary body 2 and the other end connected to the drill bit body 4, plays a crucial connecting role, ensuring that the drill bit body 4 can work together with the rotary body 2.

[0027] The drill bit body 4 is installed at one end of the drill bit connector 3, and the connection ends of the drill bit connector 3 and the drill bit body 4 are both wedge-shaped structures. Multiple sets of fixing pins 5 are inserted into the inner wall of the drill bit connector 3 and the drill bit body 4.

[0028] The drill bit body 4 is the part that actually performs the drilling work. It breaks geological materials such as rocks or soil by rotating and axially advancing. The wedge-shaped structure design of the connection end between the drill bit body 4 and the drill bit connector 3 helps to achieve precise positioning and tight fit during installation. The fixing pin 5 is inserted into the first pin hole 15 of the drill bit connector 3 and the second pin hole 16 of the drill bit body 4, which can play a role in positioning and fixing, preventing relative rotation or axial movement between the drill bit connector 3 and the drill bit body 4 during operation, and enhancing the stability of the connection.

[0029] The first water tank 6 is opened on the inner wall of the rotating flange 1. Multiple sets of water guide holes 7 are opened on the inner wall of the rotating body 2. The second water tank 8 is opened on the inner wall of the drill bit joint 3. The inner walls of the second water tank 8 and the first water tank 6 are connected to the inner walls of the water guide holes 7. The second water tank 8 and the first water tank 6 are both annular in shape.

[0030] Since the first water tank 6 is located on the inner wall of the rotary flange 1 and the second water tank 8 is located on the inner wall of the drill bit joint 3, and both are annular in shape, they can store a certain amount of water flow. Through communication with the water guide hole 7, the water injection hole 9, and the water outlet hole 11, the water flow is guided to flow along a set path to achieve the functions of cooling and chip removal of the drill bit. The water guide hole 7 is the channel for water flow from the rotary flange 1 to the drill bit joint 3, ensuring that the water flow can smoothly reach the area around the drill bit body 4 for cooling and chip removal.

[0031] The inner wall of the rotary flange 1 is provided with multiple sets of water injection holes 9 and mounting holes 10, and the inner wall of the water injection holes 9 is connected to the inner wall of the first water tank 6; the inner wall of the drill bit connector 3 is provided with multiple sets of water outlet holes 11, and the inner wall of the water outlet holes 11 is connected to the inner wall of the second water tank 8.

[0032] Water injection hole 9 is the inlet for external water to enter the internal water circulation system of the drill bit. Cooling water can be injected into the first water tank 6 through water injection hole 9. The mounting hole 10 is used to fix the rotary flange 1 to the drilling rig and other equipment. The water outlet hole 11 can guide the water flow to spray out and directly cool the drill teeth 14 and gauge bar 13 on the drill bit body 4. At the same time, it washes away the rock cuttings generated during drilling to ensure the smooth progress of drilling work.

[0033] Multiple sets of mounting grooves 12 are provided on the outer side of the drill bit body 4. A gauge bar 13 is installed on the inner wall of the mounting groove 12, and the outer side of the gauge bar 13 is interference-fitted with the inner wall of the mounting groove 12. A drill tooth 14 is fixed at one end of the drill bit body 4.

[0034] The gauge protection strip 13 is installed in the mounting groove 12 on the outside of the drill bit body 4 and is interference-fitted with the mounting groove 12. During drilling, the gauge protection strip 13 contacts the borehole wall to prevent the diameter of the drill bit body 4 from decreasing due to wear, ensuring that the diameter of the borehole meets the design requirements and improving the drilling quality. The drill teeth 14 are the direct working parts of the drill bit. The drill teeth 14 have sharp cutting edges. During the rotation and axial advance of the drill bit, the drill teeth 14 contact geological materials such as rocks or soil and break the geological materials through impact and cutting action to achieve the drilling function.

[0035] The inner wall of the drill bit connector 3 has multiple sets of first pin holes 15, and the inner wall of the drill bit body 4 has multiple sets of second pin holes 16. The inner walls of the first pin holes 15 and the second pin holes 16 are inserted into the outer side of the fixed pin shaft 5.

[0036] By engaging the first pin hole 15 with the second pin hole 16 on the drill bit body 4 and inserting the fixing pin 5, the connection stability between the drill bit connector 3 and the drill bit body 4 can be enhanced.

[0037] The inner wall of the drill bit body 4 has multiple sets of first threaded holes 18, and the inner wall of the first threaded holes 18 is threaded with fixing bolts 17; the inner wall of the drill bit connector 3 has multiple sets of second threaded holes 19, and the inner wall of the second threaded holes 19 is threaded with the outer side of the fixing bolts 17.

[0038] By connecting the fixing bolt 17 to the first threaded hole 18 on the drill bit body 4 and the second threaded hole 19 on the drill bit connector 3, the connection strength between the drill bit body 4 and the drill bit connector 3 can be further enhanced, preventing the connection from loosening due to vibration or impact during operation and ensuring the stable operation of the drill bit.

[0039] Working principle: When this easily detachable rotary drill bit is in operation, it is first connected to the drilling rig through the mounting hole 10 on the rotary flange 1. The drilling rig provides it with rotational and axial propulsion power. During drilling, external water is injected into the first water groove 6 on the inner wall of the rotary flange 1 through the water injection hole 9. Since the first water groove 6 is connected to the water guide hole 7 on the inner wall of the rotary body 2, the water can flow into the second water groove 8 on the inner wall of the drill bit joint 3 along the water guide hole 7. The second water groove 8 is connected to the water outlet hole 11, and the water is sprayed out from the water outlet hole 11 to cool the drill teeth 14 and gauge bar 13 on the drill bit body 4, and at the same time wash away the rock cuttings generated during drilling, ensuring smooth drilling. The drill bit body 4 is the core component of drilling, and the drill teeth at one end... 14. Directly in contact with geological materials, it breaks rocks or soil through rotation and axial propulsion. The gauge strip 13 in the outer mounting groove 12 contacts the borehole wall to prevent uneven wear of the drill bit body 4 and maintain a stable borehole diameter. The connection end between the drill bit connector 3 and the drill bit body 4 adopts a wedge structure for easy installation and positioning. Multiple sets of fixing pins 5 are inserted into the first pin hole 15 and the second pin hole 16 to play a preliminary fixing role. At the same time, the fixing bolts 17 are threaded to the first threaded hole 18 of the drill bit body 4 and the second threaded hole 19 of the drill bit connector 3, respectively, to further enhance the connection stability. When it is necessary to disassemble the drill bit, simply unscrew the fixing bolts 17 and pull out the fixing pins 5 to separate the drill bit body 4 from the drill bit connector 3.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable roller bit comprising a roller flange (1), characterized in that, Also includes: A rotating drum body (2) is installed on one side of the rotating drum flange (1), and a drill bit connector (3) is installed at one end of the rotating drum body (2); The drill bit body (4) is installed at one end of the drill bit connector (3), and the connection ends of the drill bit connector (3) and the drill bit body (4) are both wedge-shaped structures. The drill bit connector (3) and the inner wall of the drill bit body (4) are connected to multiple sets of fixing pins (5). The first water tank (6) is opened on the inner wall of the rotating flange (1). The inner wall of the rotating body (2) has multiple sets of water guide holes (7). The inner wall of the drill bit joint (3) is provided with a second water tank (8). The inner walls of the second water tank (8) and the first water tank (6) are connected to the inner walls of the water guide holes (7). The second water tank (8) and the first water tank (6) are both annular in shape.

2. A detachable roller bit according to claim 1, wherein: The inner wall of the rotary flange (1) is provided with multiple sets of water injection holes (9) and mounting holes (10), and the inner wall of the water injection hole (9) is connected to the inner wall of the first water tank (6).

3. A detachable roller bit according to claim 1, wherein: The inner wall of the drill bit connector (3) has multiple sets of water outlet holes (11), and the inner wall of the water outlet holes (11) is connected to the inner wall of the second water tank (8).

4. A detachable roller bit as defined in claim 1 wherein: The drill bit body (4) has multiple sets of mounting grooves (12) on its outer side. A gauge bar (13) is installed on the inner wall of the mounting groove (12), and the outer side of the gauge bar (13) is press-fitted with the inner wall of the mounting groove (12). A drill tooth (14) is fixed at one end of the drill bit body (4).

5. A detachable roller bit as defined in claim 1 wherein: The inner wall of the drill bit connector (3) has multiple sets of first pin holes (15), and the inner wall of the drill bit body (4) has multiple sets of second pin holes (16). The inner walls of the first pin holes (15) and the second pin holes (16) are inserted into the outer side of the fixed pin shaft (5).

6. A detachable roller bit as defined in claim 1 wherein: The inner wall of the drill bit body (4) has multiple sets of first threaded holes (18), and the inner wall of the first threaded holes (18) is threaded with fixing bolts (17).

7. A detachable roller bit as defined in claim 6 wherein: The inner wall of the drill bit connector (3) has multiple sets of second threaded holes (19), and the inner wall of the second threaded holes (19) is threadedly connected to the outer side of the fixing bolt (17).

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