Drill bit for drilling pebbles and boulders

Abstract

This utility model provides a drill bit for drilling and collecting pebbles and boulders, belonging to the technical field of tools for drilling and retrieving pebbles and boulders. The drill bit includes a base plate, side plates, a connecting rod, a breaker head, a baffle, and wear-resistant components. The base plate is circular with a fan-shaped opening. The side plates are arc-shaped and fixed to the upper part of the base plate, with a gradually changing height that makes the upper end face spiral. The connecting rod is vertically fixed to the base plate, with the lower end connected to the breaker head and the upper end having a connecting head. The baffle and wear-resistant components are located between the side plates and the connecting rod. The wear-resistant components include a limiting plate and a wear-resistant bullet head. The breaker head includes a square rod, a base, and cutting teeth, and may also include an extension plate. This drill bit can efficiently drill and collect pebbles and boulders, has a reasonable structure, is easy to use, and is suitable for related drilling and retrieval operations.

Description

Technical Field

[0001] This utility model relates to the technical field of tools for drilling and retrieving pebbles and boulders, specifically a drill bit for drilling pebbles and boulders. Background Technology

[0002] In engineering fields such as geological exploration, pile foundation construction, and underground pipeline laying, it is often necessary to deal with complex strata containing a large number of pebbles and boulders. These pebbles and boulders are hard in texture and randomly distributed, which brings great challenges to drilling operations.

[0003] Currently, traditional drilling tools generally suffer from numerous problems when dealing with this type of formation. For example, conventional drill bits have a simple cutting structure design, often using a single breaking tooth for impact crushing. For harder pebbles and boulders, this not only results in low crushing efficiency but also causes extremely rapid bit wear, requiring frequent replacements and severely impacting construction progress. Furthermore, traditional drill bits lack effective collection and storage structures, allowing crushed pebble and boulder fragments to easily scatter back to the bottom of the borehole, leading to repeated crushing and further increasing construction costs and time.

[0004] Furthermore, existing drill bits and drilling rigs are mostly connected by fixed or complex threaded connections. During drilling, if a hard boulder is encountered and generates significant torque, the connection is prone to loosening or even breakage, posing a safety hazard. Moreover, the slag removal and unloading structures of traditional drill bits are poorly designed, making it difficult to quickly and thoroughly remove collected pebbles and boulders. This often requires stopping the machine for manual cleaning, further reducing construction efficiency.

[0005] During drilling, due to the lack of an auxiliary downpressure structure, traditional drill bits need to rely on the pressure of the drilling rig itself to drill into the formation. For dense pebble layers, the phenomenon of "stuck drill bit" often occurs, that is, the drill bit gets stuck in the pebbles and cannot continue drilling or lifting. This not only damages the drill bit, but may also cause the borehole to collapse, resulting in serious engineering accidents.

[0006] Therefore, in response to the problems of low crushing efficiency, rapid drill bit wear, unstable connection, difficulty in slag removal, and easy drill jamming in existing technologies, developing a drill bit that can efficiently crush, stably collect, conveniently discharge materials, and has strong adaptability for drilling pebbles and boulders has become a key issue that urgently needs to be solved in engineering practice. Utility Model Content

[0007] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a drill bit for drilling pebbles and boulders, which can efficiently drill and collect pebbles and boulders.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A drill bit for drilling pebbles and boulders includes a base plate, side plates, a connecting rod, a breaker head, a baffle, and wear-resistant components. The base plate has a circular cross-section with a fan-shaped opening, the two sides of which form a first opening face and a second opening face. The side plates are arc-shaped, with a diameter equal to that of the base plate. The side plates are fixed to the upper part of the base plate, and their axes are collinear. One end face of the side plate is in the same plane as the first opening face, and the other end face is in the same plane as the second opening face. The height of the side plates varies from near the first opening face to near the second opening face. The direction gradually decreases; the connecting rod is vertically fixed to the upper surface of the base plate; the lower end of the connecting rod passes through the base plate and extends downwards; the axis of the connecting rod coincides with the axis of the base plate; the crushing head is fixed to the lower end of the connecting rod; a connector is fixedly installed at the upper end of the connecting rod; the baffle and wear-resistant component are placed between the side plate and the connecting rod; one end of the baffle is fixedly connected to the inner side of the side plate, the other end is fixedly connected to the connecting rod, and the lower end is fixedly connected to the base plate; the outer side of the baffle and the first opening surface are located in the same vertical plane; the wear-resistant component is located above the second opening surface and fixed to the upper surface of the base plate, one end is fixedly connected to the connecting rod, and the other end is fixedly connected to the side plate.

[0010] Preferably, the wear-resistant component includes a limiting plate and a plurality of wear-resistant bullet heads; the lower end face of the limiting plate is fixed to the upper end face of the base plate, one side is fixed to the connecting rod, and the other side is fixed to the inner side of the side plate; the limiting plate is obliquely arranged above the base plate, the outer side of the lower end face of the limiting plate is connected to the upper end of the second opening face, and the upper end face extends away from the second plane; the wear-resistant bullet heads are fixed on the limiting plate, and the front end of the wear-resistant bullet heads is arranged facing the baffle; the plurality of wear-resistant bullet heads are arranged in an equally spaced array along the length direction of the limiting plate.

[0011] Preferably, the crushing head includes a square rod, a base, and multiple cutting teeth; the square rod is fixed to the upper part of the base; the cutting teeth are fixed to the lower part of the base; a sleeve is fixedly provided at the lower end of the connecting rod, and a square hole adapted to the square rod is provided inside the sleeve; a first pin hole is provided on the sleeve, and a second pin hole corresponding to the first pin hole is provided on the square rod; the sleeve is sleeved and installed on the square rod, and the sleeve is fixed to the square rod by inserting bolts into the second pin hole and the first pin hole.

[0012] Preferably, a square sleeve is fixedly provided at the upper end of the connecting rod; a third pin hole is provided on the square sleeve; the square sleeve is used to connect with the drill rod of the drilling rig, and the square sleeve is fixed to the drill rod of the drilling rig by inserting a pin into the third pin hole.

[0013] Preferably, it also includes an extension plate; the extension plate is in the shape of a right triangle; one right-angled end face of the extension plate is fixed to the upper end face of the baffle, and the other right-angled end face is fixed to the square sleeve; the outer side of the extension plate and the outer side of the baffle are in the same plane.

[0014] Preferably, the extension plate is provided with lifting holes.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The upper surface of the side plate of this utility model is spiral-shaped, which provides downward pressure when the drill bit rotates, making it easier for the drill bit to penetrate pebbles, boulders, and loose soil, thus accelerating the drilling speed. Through the cooperation of the fan-shaped opening, baffle, and wear-resistant components in the base plate, broken pebbles and boulders can be collected in the space inside the side plate and above the base plate, preventing stones from falling and improving collection efficiency. The square sleeve allows for convenient connection to the drill rod; simply pull the drill bit and tilt the drill rod to empty the stones, making operation simple and convenient. The fixing method of the baffle and wear-resistant components enhances the stability of the overall structure, the extension plate improves the structural connection strength, and the detachable connection of the breaking head facilitates the replacement of worn parts, extending the service life of the drill bit. The lifting holes on the extension plate facilitate the installation, removal, and transportation of the drill bit, improving the tool's practicality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram showing the disassembled state of the wear-resistant component in this utility model.

[0019] in:

[0020] 1. Side plate; 2. Baffle; 3. Lifting hole; 4. Extension plate; 5. Third pin hole; 6. Square sleeve; 7. Connecting rod; 8. Base plate; 9. Wear-resistant bullet head; 10. Limiting plate; 11. Second opening face; 12. Fan-shaped opening; 13. Base; 14. Cutting tooth; 15. Sleeve; 16. First opening face; 17. Square rod. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2As shown, a drill bit for drilling pebbles and boulders includes a base plate 8, a side plate 1, a connecting rod 7, a breaker head, a baffle 2, and wear-resistant components. The base plate 8 has a circular cross-section and a fan-shaped opening 12. The planes containing the two sides of the fan-shaped opening 12 are the first opening surface 16 and the second opening surface 11. The angle of the fan-shaped opening 12 is 90°. The side plate 1 is arc-shaped, and its diameter is equal to that of the base plate 8. The side plate 1 is fixed to the upper part of the base plate 8, and the axis of the side plate 1 is collinear with the axis of the base plate 8. The outer surface of the side plate 1 is connected to the outer surface of the base plate 8. One end face of the side plate 1 is in the same plane as the first opening surface 16, and the other end face is in the same plane as the second opening surface 11. The height of the side plate 1 gradually decreases from the direction closer to the first opening surface 16 to the direction closer to the second opening surface 11. The upper surface of the side plate 1 is spiral-shaped. When the drill bit rotates, the spiral upper surface can provide downward pressure to the drill bit, making it easier for the drill bit to drill into pebbles, boulders, and loose soil. The connecting rod 7 is vertically fixed to the upper surface of the base plate 8. The lower end of the connecting rod 7 passes through the base plate 8 and extends downward. The axis of the connecting rod 7 coincides with the axis of the base plate 8. The breaker head is fixed to the lower end of the connecting rod 7. A connector is fixedly provided at the upper end of the connecting rod 7. The baffle 2 and the wear-resistant component are placed between the side plate 1 and the connecting rod 7. One end of the baffle 2 is fixedly connected to the inner side of the side plate 1, and the other end is fixedly connected to the connecting rod 7. The lower end is fixedly connected to the base plate 8. The outer side of the baffle 2 and the first opening surface 16 are located in the same vertical plane. The wear-resistant component is located above the second opening surface 11 and fixed to the upper surface of the base plate 8. One end is fixedly connected to the connecting rod 7, and the other end is fixedly connected to the side plate 1.

[0023] When drilling pebbles and boulders, the breaker head loosens the pebbles and boulders, and the wear-resistant components further break them apart. The pebbles and boulders enter the space inside the side plate 1 and the upper side of the bottom plate 8 through the fan-shaped opening 12 of the bottom plate 8. The baffle 2 prevents the pebbles and boulders from falling. The drill bit is lifted up as a whole, and the drill rod of the drilling machine is tilted at a certain angle, so that the pebbles and boulders that have been retrieved from inside the drill bit fall out through the fan-shaped opening 12.

[0024] In this embodiment, the wear-resistant component includes a limiting plate 10 and multiple wear-resistant bullet heads 9. The lower end face of the limiting plate 10 is fixed to the upper end face of the base plate 8, one side is fixed to the connecting rod 7, and the other side is fixed to the inner side of the side plate 1. The limiting plate 10 is obliquely arranged above the base plate 8, and the outer side of the lower end face of the limiting plate 10 is connected to the upper end of the second opening face 11, while the upper end face extends away from the second plane. The wear-resistant bullet heads 9 are fixed on the limiting plate 10, and the front end of the wear-resistant bullet heads 9 is arranged facing the baffle 2. Multiple wear-resistant bullet heads 9 are arranged in an equally spaced array along the length direction of the limiting plate 10. The wear-resistant bullet heads 9 are used to break up clumps of pebbles, boulders, and loose soil. The obliquely arranged limiting plate 10 facilitates the entry of pebbles, boulders, or loose soil into the drill bit when it rotates.

[0025] In this embodiment, the breaker head includes a square rod 17, a base 13, and multiple cutting teeth 14. The square rod 17 is fixed to the upper part of the base 13; the cutting teeth 14 are fixed to the lower part of the base 13; a sleeve 15 is fixedly provided at the lower end of the connecting rod 7, and a square hole adapted to the square rod 17 is provided inside the sleeve 15; a first pin hole is provided on the sleeve 15, and a second pin hole corresponding to the first pin hole is provided on the square rod 17. The sleeve 15 is sleeved and installed on the square rod 17, and the sleeve 15 is fixed to the square rod 17 by inserting bolts into the second pin hole and the first pin hole. The cutting teeth 14 are used to break up clumps of pebbles, boulders, or loose soil, making it easier for the drill bit to drill downwards.

[0026] In this embodiment, a square sleeve 6 is fixedly provided at the upper end of the connecting rod 7; a third pin hole 5 is provided on the square sleeve 6; the square sleeve 6 is used to connect with the drill rod of the drilling rig, and the square sleeve 6 is fixed to the drill rod of the drilling rig by inserting a pin into the third pin hole 5.

[0027] In this embodiment, an extension plate 4 is also included; the extension plate 4 is a right-angled triangle; one right-angled end face of the extension plate 4 is fixed to the upper end face of the baffle 2, and the other right-angled end face is fixed to the square sleeve 6; the outer surface of the extension plate 4 and the outer surface of the baffle 2 are in the same plane. The extension plate 4 increases the material accumulation at the top of the drill bit while improving the structural connection strength.

[0028] In this embodiment, the extension plate 4 is provided with a lifting hole 3 to facilitate the installation and removal of the drill bit.

[0029] Working principle

[0030] When drilling for pebbles and boulders, the breaker head loosens the pebbles and boulders, and the wear-resistant components further break them apart. Subsequently, the pebbles and boulders enter the space above the side plate 8 through the fan-shaped opening 12 of the base plate 8. The baffle 2 prevents the pebbles and boulders from falling out. When the drill bit is lifted as a whole and the drill rod of the drilling rig is tilted at a certain angle, the pebbles and boulders retrieved from inside the drill bit will fall out through the fan-shaped opening 12.

[0031] The wear-resistant bullet head 9 in the wear-resistant component is used to break up clumps of pebbles, boulders, and loose soil. The obliquely arranged limiting plate 10 facilitates the entry of pebbles, boulders, or loose soil into the drill bit's interior when the drill bit rotates. The cutting teeth 14 of the breaker head are used to break up clumps of pebbles, boulders, or loose soil, making it easier for the drill bit to drill downwards. The height of the side plate 1 gradually decreases from the direction near the first opening face 16 to the direction near the second opening face 11, making the upper end face of the side plate 1 spiral. When the drill bit rotates, the spiral upper end face can provide downward pressure to the drill bit, making it easier for the drill bit to drill into pebbles, boulders, and loose soil.

[0032] How to use

[0033] Connection and installation: Connect the drill bit to the drill rod of the drilling rig through the square sleeve 6 at the upper end of the connecting rod 7, insert the pin into the third pin hole 5 on the square sleeve 6, and fix the square sleeve 6 to the drill rod of the drilling rig to complete the installation of the drill bit and the drilling rig.

[0034] Drilling operation: Start the drill and rotate the drill bit. The crushing head first loosens the pebbles and boulders, and the wear-resistant components further break them up. The stones enter the space inside the side plate 1 and the upper side of the bottom plate 8 through the fan-shaped opening 12 of the bottom plate 8. The baffle 2 prevents the stones from falling.

[0035] Remove the stones: Lift the drill bit as a whole and tilt the drill rod of the drill rig at a certain angle so that the pebbles and boulders inside the drill bit fall out through the fan-shaped opening 12.

[0036] Disassembly and handling: If it is necessary to disassemble or move the drill bit, the lifting hole 3 on the extension plate 4 can be used for operation. When the cutting teeth 14 of the breaker head are worn, remove the bolts from the pin holes of the square rod 17 and the sleeve 15, and remove the breaker head for replacement.

Claims

1. A drill bit for drilling pebbles and boulders, characterized in that, The system includes a base plate (8), side plates (1), connecting rods (7), a crushing head, baffles (2), and wear-resistant components. The base plate (8) has a circular cross-section and a fan-shaped opening (12). The plane containing the two sides of the fan-shaped opening (12) is the first opening surface (16) and the second opening surface (11). The side plate (1) is arc-shaped, and its diameter is equal to that of the base plate (8). The side plate (1) is fixed to the upper part of the base plate (8), and the axis of the side plate (1) is collinear with the axis of the base plate (8). One end face of the side plate (1) is in the same plane as the first opening surface (16), and the other end face is in the same plane as the second opening surface (11). The height of the side plate (1) gradually increases from the direction closer to the first opening surface (16) to the direction closer to the second opening surface (11). The diameter gradually decreases; the connecting rod (7) is vertically fixed on the upper surface of the base plate (8); the lower end of the connecting rod (7) passes through the base plate (8) and extends downward; the axis of the connecting rod (7) coincides with the axis of the base plate (8); the crushing head is fixed at the lower end of the connecting rod (7); a connecting head is fixedly provided at the upper end of the connecting rod (7); the baffle (2) and the wear-resistant component are placed between the side plate (1) and the connecting rod (7); one end of the baffle (2) is fixedly connected to the inner side of the side plate (1), the other end is fixedly connected to the connecting rod (7), and the lower end is fixedly connected to the base plate (8); the outer side of the baffle (2) and the first opening surface (16) are located in the same vertical plane; the wear-resistant component is located above the second opening surface (11) and fixed on the upper surface of the base plate (8), one end is fixedly connected to the connecting rod (7), and the other end is fixedly connected to the side plate (1).

2. The drill bit for drilling pebbles and boulders as described in claim 1, characterized in that, The wear-resistant component includes a limiting plate (10) and multiple wear-resistant bullet heads (9); the lower end face of the limiting plate (10) is fixed to the upper end face of the base plate (8), one side is fixed to the connecting rod (7), and the other side is fixed to the inner side of the side plate (1); the limiting plate (10) is obliquely arranged above the base plate (8), the outer side of the lower end face of the limiting plate (10) is connected to the upper end of the second opening face (11), and the upper end face extends away from the second plane; the wear-resistant bullet heads (9) are fixed on the limiting plate (10), and the front end of the wear-resistant bullet heads (9) is arranged facing the baffle (2); multiple wear-resistant bullet heads (9) are arranged in an equally spaced array along the length direction of the limiting plate (10).

3. The drill bit for drilling pebbles and boulders as described in claim 1, characterized in that, The crushing head includes a square rod (17), a base (13), and multiple cutting teeth (14); the square rod (17) is fixed to the upper part of the base (13); the cutting teeth (14) are fixed to the lower part of the base (13); a sleeve (15) is fixedly provided at the lower end of the connecting rod (7), and a square hole adapted to the square rod (17) is provided in the sleeve (15); a first pin hole is provided on the sleeve (15), and a second pin hole corresponding to the first pin hole is provided on the square rod (17). The sleeve (15) is sleeved and installed on the square rod (17), and the sleeve (15) is fixed on the square rod (17) by inserting bolts into the second pin hole and the first pin hole.

4. The drill bit for drilling pebbles and boulders as described in any one of claims 1 to 3, characterized in that, A square sleeve (6) is fixedly provided at the upper end of the connecting rod (7); a third pin hole (5) is provided on the square sleeve (6); the square sleeve (6) is used to connect with the drill rod of the drilling machine, and the square sleeve (6) is fixed on the drill rod of the drilling machine by inserting a pin into the third pin hole (5).

5. The drill bit for drilling pebbles and boulders as described in claim 4, characterized in that, It also includes an extension plate (4); the extension plate (4) is a right triangle; one right-angled end face of the extension plate (4) is fixed to the upper end face of the baffle (2), and the other right-angled end face is fixed to the square sleeve (6); the outer side of the extension plate (4) and the outer side of the baffle (2) are in the same plane.

6. The drill bit for drilling pebbles and boulders as described in claim 5, characterized in that, The extension plate (4) is provided with a hoisting hole (3).

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