Drill bit of rotary drilling rig

Abstract

The utility model relates to a drill bit of a rotary drilling rig, which belongs to the technical field of building machinery and comprises a barrel, a drill rod and two grab buckets. Wherein the side wall of the cylinder body is provided with two openings which are symmetrical along the central axis of the cylinder body; the drill rod is rotatably connected with the barrel body, is connected with the rotary drilling rig and is used for ascending or descending along with the rotary drilling rig; the two grab buckets are mounted at the opening of the barrel, and the upper ends of the two grab buckets are hinged to the barrel; the two grab buckets are connected with the drill rod, when the drill rod is lifted, the upper ends of the two grab buckets rotate upwards around the hinged position and drive the lower ends of the two grab buckets to rotate, and the two grab buckets are in a closed state; when the drill rod descends, the upper ends of the two grab buckets rotate downwards around the hinged position and drive the lower ends of the two grab buckets to rotate, and the two grab buckets are in an open state. The drill bit of the rotary drilling rig can be suitable for various geological conditions such as cohesive soil, mucky soil, filling soil, sandy soil, pebble soil, mudstone and sandstone, and the frequency of replacing the drill bit during complex geological construction is reduced, so that the construction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, in particular to a drill bit for a rotary drilling rig. Background Art

[0002] Rotary drilling construction is an advanced pile foundation construction technology that has developed rapidly in my country in recent years. Rotary drilling rig construction has many characteristics such as high efficiency, low noise, environmental protection, high hole quality, and high degree of mechanization. Rotary drilling rigs have been widely used for their strong adaptability to various soil conditions, no extrusion effect, no vibration damage, low noise, no mud, and fast hole-making speed.

[0003] At present, the common classification of rotary drilling bits includes spiral drill bits, rotary drilling buckets, barrel core drill bits, bottom expansion drill bits, impact drill bits, impact grab cone drill bits and hydraulic grab buckets. However, each drill bit only corresponds to the corresponding geology. No drill bit can correspond to any geology, and there is no special drill bit for the bottom layer of large cobblestones. Traditional drill bits can only be replaced continuously for different geology to adapt to geological changes. If the replacement is not timely, the drill bit may be damaged and the efficiency may be low. The large cobblestone layer may also cause drill jamming due to hole collapse.

[0004] Therefore, how to provide a rotary drilling rig drill bit suitable for a variety of geological conditions is a technical problem that urgently needs to be solved. Utility Model Content

[0005] In view of the shortcomings in the prior art, the utility model provides a rotary drilling rig drill bit. Through the arrangement of a barrel and two grab buckets, the rotary drilling rig drill bit can have the advantages of both a barrel drill bit and a rotary drilling drill bit. It can be applied to various geological conditions such as clay, silty soil, fill, sandy soil, pebble soil, mudstone, sandstone, etc., reducing the frequency of drill bit replacement during complex geological construction.

[0006] The utility model provides a rotary drilling rig drill bit, comprising:

[0007] The cylinder has two openings symmetrically arranged on the side wall of the cylinder along the central axis of the cylinder;

[0008] A drill rod, which is rotatably connected to the barrel, and is connected to the rotary drilling rig, and is used to be lifted or lowered along with the rotary drilling rig;

[0009] Two grabs are installed at the opening of the cylinder, and the upper ends of the two grabs are hinged to the cylinder; the two grabs are connected to the drill rod, and when the drill rod is lifted, the upper ends of the two grabs rotate upward around their hinges and drive the lower ends to rotate, and the two grabs are in a closed state; when the drill rod is lowered, the upper ends of the two grabs rotate downward around their hinges and drive the lower ends to rotate, and the two grabs are in an open state.

[0010] Through the arrangement of a barrel and two grab buckets, the technical solution enables the drill bit of the rotary drilling rig to have the advantages of both a barrel drill bit and a rotary drilling bit, and can be applied to various geological conditions such as clay, silty soil, fill, sandy soil, pebble soil, mudstone, sandstone, etc., reducing the frequency of drill bit replacement during complex geological construction, thereby improving construction efficiency.

[0011] In some embodiments, the drill rod is equipped with a slider, and a limiter is provided above the barrel; the limiter is provided with a slide groove, and when the drill rod is lifted or lowered, the slider moves along the slide groove to the end of the slide groove to limit the relative position of the drill rod and the barrel. This technical solution. Through the slider and the slide groove of the limiter, the relative position of the drill rod and the barrel can be accurately controlled, avoiding the deviation of the drill rod, making the drill rod more stable during the lifting and lowering process.

[0012] In some embodiments, the slide groove includes a transverse slide groove and a longitudinal slide groove that are interconnected; when the drill rod is lifted, the drill rod rotates in a first direction and drives the slider to slide along the transverse slide groove to the end of the longitudinal slide groove; when the drill rod is lowered, the drill rod rotates in a second direction and drives the slider to slide along the longitudinal slide groove to the end of the transverse slide groove. This technical solution enables the drill rod to rotate in different directions during the lifting and lowering processes by setting the transverse slide groove and the longitudinal slide groove, and realizes precise positioning by moving the slider in the slide groove.

[0013] In some embodiments, a connecting rod for connecting the drill rod is provided at the middle and lower part of the grab. The technical solution enables the grab to be more firmly connected to the drill rod through the provision of the rod, thereby enhancing the stability and operating accuracy of the grab.

[0014] In some embodiments, the connecting rod is hinged to the grab bucket. The technical solution enables the grab bucket to move flexibly during the lifting and lowering process through the hinge between the connecting rod and the grab bucket, thereby reducing mechanical wear.

[0015] In some embodiments, a connecting plate is provided at the connection between the connecting rod and the drill rod, and the connecting plate is used to be lifted or lowered along with the drill rod, and the connecting rod is hinged to the connecting plate. This technical solution enables the connecting rod to be lifted or lowered along with the drill rod by providing the connecting plate, thereby ensuring the synchronous movement of the two grabs and improving the coordination and efficiency of the construction.

[0016] In some embodiments, a rotating part is provided at the center of the connecting disk, and the rotating part is rotatably connected to the connecting disk to offset the rotational movement of the drill rod. The technical solution prevents the grab bucket from deviating due to rotation by providing the rotating part, thereby ensuring the stability of the grab bucket and the hole-forming quality.

[0017] In some embodiments, a baffle is provided at the lower end of the grab bucket, and the baffle is hinged to the grab bucket to prevent objects in the grab bucket from falling when the two grab buckets are closed. In this technical solution, by setting the baffle, when the two grab buckets are closed, the baffle can automatically open by gravity, thereby preventing objects from falling and ensuring the safe transportation of materials in the grab bucket.

[0018] In some embodiments, drill teeth are provided at the bottom of the cylinder. The technical solution enhances the drilling ability of the cylinder and improves the drilling efficiency by providing the drill teeth, and adapts to the construction requirements under different geological conditions.

[0019] In some embodiments, the outer surfaces of the barrel and the two grabs are provided with spiral patterns. The technical solution can increase the friction between the barrel and the grabs through the provision of the spiral patterns, thereby improving the stability and efficiency during the drilling process.

[0020] Based on the above scheme, the rotary drilling rig drill bit has the advantages of both a barrel drill bit and a rotary drilling bit through the arrangement of a barrel and two grabs, and can be applied to various geological conditions such as clay, silty soil, fill soil, sandy soil, pebble soil, mudstone, sandstone, etc., reducing the frequency of drill bit replacement during complex geological construction, thereby improving construction efficiency; especially when used in pebble layers, the two grabs can be closed, which can greatly reduce the phenomenon of the rotary drilling rig being stuck due to the collapse of the pebble layer, thereby ensuring the continuity and safety of the construction. In addition, when a hard object such as a cone falls into the hole, continuing to drill the hole will cause damage to the drill bit, and the cone can be removed through the grab, thereby reducing damage to the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 This is a structural schematic diagram of the utility model rotary drilling rig with the drill bit in an open state;

[0023] Figure 2 It is a three-dimensional diagram of the rotary drilling rig drill bit of the utility model in an open state;

[0024] Figure 3 for Figure 2 sectional perspective view;

[0025] Figure 4 It is a three-dimensional diagram of the grab bucket when the drill bit of the rotary drilling rig of the utility model is in an open state;

[0026] Figure 5 This is a structural schematic diagram of the utility model rotary drilling rig drill bit in a closed state;

[0027] Figure 6 It is a three-dimensional diagram of the drill bit of the rotary drilling rig of the utility model in a closed state;

[0028] Figure 7 for Figure 6 sectional perspective view;

[0029] Figure 8 It is a three-dimensional diagram of the grab bucket when the drill bit of the rotary drilling rig of the utility model is in a closed state.

[0030] In the figure:

[0031] 1. Cylinder; 101. Drill teeth; 2. Grab bucket; 201. Baffle; 3. Drill rod; 301. Slider; 4. Limiting piece; 401. Slide; 5. Connecting plate; 501. Rotating part; 6. Connecting rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figure 1-Figure 8 As shown, in one embodiment of the rotary drilling rig drill bit of the utility model, the rotary drilling rig drill bit includes a barrel 1, a drill rod 3 and two grab buckets 2; wherein, the side wall of the barrel 1 is provided with two openings symmetrical along the central axis of the barrel 1; the drill rod 3 is rotatably connected to the barrel 1, and the drill rod 3 is connected to the rotary drilling rig for lifting or lowering with the rotary drilling rig; the two grab buckets 2 are installed at the opening of the barrel 1, and the upper ends of the two grab buckets 2 are hinged to the barrel 1; the two grab buckets 2 are connected to the drill rod 3, and when the drill rod 3 is lifted, the upper ends of the two grab buckets 2 rotate upward around their hinges and drive the lower ends to rotate, as shown in FIG. Figure 8 As shown, the two grab buckets 2 are in a closed state; when the drill rod 3 descends, the upper ends of the two grab buckets 2 rotate downward around their hinges and drive the lower ends to rotate, as shown in FIG. Figure 4 As shown, the two grab buckets 2 are in an open state.

[0037] In the above-mentioned exemplary embodiment, the rotary drilling rig drill bit is provided with a barrel 1 and two grabs 2, so that the rotary drilling rig drill bit can have the advantages of both a barrel drill bit and a rotary drilling bit, and can be applied to various geological conditions such as clay, silty soil, fill soil, sandy soil, pebble soil, mudstone, sandstone, etc., reducing the frequency of drill bit replacement during complex geological construction, thereby improving construction efficiency; especially when used in pebble layers, the two grabs 2 can be closed, which can greatly reduce the phenomenon of the rotary drilling rig being stuck due to the collapse of the pebble layer, thereby ensuring the continuity and safety of the construction. In addition, when a hard object such as a cone falls into the hole, continuing to drill the hole will cause damage to the drill bit, and the cone can be removed by the grab 2, thereby reducing damage to the drill bit.

[0038] In some embodiments, Figure 2 As shown, the drill rod 3 is equipped with a slider 301, and a stopper 4 is provided above the barrel 1; the stopper 4 is provided with a slide groove 401, and when the drill rod 3 is lifted or lowered, the slider 301 moves along the slide groove 401 to the end of the slide groove 401 to limit the relative position of the drill rod 3 and the barrel 1. Through the slider 301 and the slide groove 401 of the stopper 4, the relative position of the drill rod 3 and the barrel 1 can be accurately controlled, and the deviation of the drill rod 3 is avoided, so that the drill rod 3 is more stable during the lifting and lowering process, the construction error caused by the shaking of the drill rod 3 is reduced, and the construction accuracy and hole quality are improved.

[0039] Furthermore, if Figure 2As shown, the slide groove 401 includes a transverse slide groove and a longitudinal slide groove that are interconnected; when the drill rod 3 is lifted, the drill rod 3 rotates in a first direction and drives the slider 301 to slide along the transverse slide groove to the end of the longitudinal slide groove; when the drill rod 3 is lowered, the drill rod 3 rotates in a second direction and drives the slider 301 to slide along the longitudinal slide groove to the end of the transverse slide groove. By setting the transverse slide groove and the longitudinal slide groove, the drill rod 3 rotates in different directions during the lifting and lowering process, and the precise limit is achieved by the movement of the slider 301 in the slide groove 401.

[0040] In some embodiments, Figure 3 As shown, a connecting rod 6 for connecting the drill rod 3 is provided at the middle and lower part of the grab bucket 2. Through the arrangement of the rod, the grab bucket 2 can be more firmly connected to the drill rod 3, thereby enhancing the stability and operating accuracy of the grab bucket 2.

[0041] In some embodiments, Figure 1 As shown, the connecting rod 6 is hinged to the grab bucket 2. Through the hinge between the connecting rod 6 and the grab bucket 2, the grab bucket 2 can move flexibly during the lifting and lowering process, reducing mechanical wear and extending the service life of the equipment.

[0042] In some embodiments, Figure 4 As shown, a connecting plate 5 is provided at the connection between the connecting rod 6 and the drill rod 3, and the connecting plate 5 is used to be lifted or lowered along with the drill rod 3, and the connecting rod 6 is hinged to the connecting plate 5. Through the arrangement of the connecting plate 5, the connecting rod 6 can be lifted or lowered along with the drill rod 3, ensuring the synchronous movement of the two grab buckets 2, thereby improving the coordination and efficiency of the construction.

[0043] In some embodiments, Figure 5 or Figure 7 As shown, a rotating part 501 is provided at the center of the connecting disk 5, and the rotating part 501 is rotatably connected to the connecting disk 5 to offset the rotational movement of the drill rod 3. The setting of the rotating part 501 prevents the grab bucket 2 from deflecting due to rotation, thereby ensuring the stability and hole-forming quality of the grab bucket 2. It should be noted that the rotating part 501 located at the center of the connecting disk 5 is provided with two layers, the inner layer rotates with the drill rod 3, and the outer layer is connected to the connecting disk 5 and does not rotate.

[0044] In some embodiments, Figure 5 As shown, a baffle 201 is provided at the lower end of the grab 2, and the baffle 201 is hinged to the grab 2, and is used to prevent objects in the grab 2 from falling when the two grabs 2 are closed. Through the setting of the baffle 201, when the two grabs 2 are closed, the baffle 201 can be automatically opened by gravity, thereby preventing objects from falling and ensuring the safe transportation of materials in the grab 2.

[0045] In some embodiments, Figure 5As shown, a drill tooth 101 is provided at the bottom of the cylinder 1. The arrangement of the drill tooth 101 enhances the drilling capability of the cylinder 1, improves the drilling efficiency, and adapts to the construction requirements under different geological conditions.

[0046] In some embodiments, Figure 6 As shown, the outer surfaces of the cylinder 1 and the two grabs 2 are provided with spiral patterns. The arrangement of the spiral patterns can increase the friction between the cylinder 1 and the grabs 2, thereby improving the stability and efficiency during the drilling process.

[0047] The working process of an embodiment of the rotary drilling rig drill bit of the utility model is described below:

[0048] When the rotary drilling rig is drilling, the grab 2 is in the open state, and the grab 2 is completely in contact with the hole wall. At this time, the drill rod 3 connected to the grab 2 is limited in the horizontal chute, and the drill rod 3 of the rotary drilling rig rotates clockwise, and the barrel 1 drills normally; when the drill bit is full of drill slag, the drill rod is rotated 360° counterclockwise to limit the drill rod 3 to the end of the longitudinal chute, and the drill rod 3 is lifted slightly. The two grabs 2 are closed, and the baffle 201 is opened at the same time. At this time, the drill rod 3 is limited at the longitudinal chute, and the lifting device is against the top of the barrel 1. The drill bit is lifted to the slag unloading position. After the drill bit touches the ground, the drill rod 3 falls under the action of gravity, and the limit drops to the horizontal chute. The drill rod 3 is rotated so that the drill rod 3 is limited at the end of the horizontal chute, thereby opening the two grabs 2, and the drill slag can be discharged under the influence of gravity, and the next cycle is carried out again.

[0049] Through the description of multiple embodiments of the rotary drilling rig drill bit of the utility model, it can be seen that the rotary drilling rig drill bit embodiment of the utility model has at least one or more of the following advantages:

[0050] 1. The rotary drilling rig drill bit provided by the utility model has the advantages of both a barrel drill bit and a rotary drilling drill bit through the arrangement of a barrel 1 and two grab buckets 2, and can be applied to various geological conditions such as clay soil, silty soil, fill soil, sandy soil, pebble soil, mudstone, sandstone, etc., reducing the frequency of drill bit replacement during complex geological construction, thereby improving construction efficiency;

[0051] 2. When the rotary drilling rig drill bit provided by the utility model is used in a pebble layer, the two grab buckets 2 can be closed, which can greatly reduce the drill jamming phenomenon of the rotary drilling rig caused by the collapse of the hole in the pebble layer, thereby ensuring the continuity and safety of the construction;

[0052] 3. When a hard object such as a cone falls into the hole of the rotary drilling rig drill bit provided by the utility model, continuing drilling will cause damage to the drill bit. The cone can be taken out by the grab 2, thereby reducing damage to the drill bit.

[0053] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0054] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A rotary drilling rig drill bit, characterized in that: include: A cylinder, wherein the side wall of the cylinder is provided with two openings symmetrically along the central axis of the cylinder; A drill rod, the drill rod is rotatably connected to the barrel, and the drill rod is connected to the rotary drilling rig and is used to be lifted or lowered along with the rotary drilling rig; Two grab buckets are installed at the opening of the cylinder, and the upper ends of the two grab buckets are hinged to the cylinder; the two grab buckets are connected to the drill rod, and when the drill rod is lifted, the upper ends of the two grab buckets rotate upward around their hinges and drive the lower ends to rotate, and the two grab buckets are in a closed state; when the drill rod is lowered, the upper ends of the two grab buckets rotate downward around their hinges and drive the lower ends to rotate, and the two grab buckets are in an open state.

2. The rotary drilling rig drill bit according to claim 1, characterized in that: The drill rod is equipped with a slide block, and a limiter is provided above the cylinder; the limiter is provided with a slide groove, and when the drill rod is lifted or lowered, the slide block moves along the slide groove to the end of the slide groove to limit the relative position of the drill rod and the cylinder.

3. The rotary drilling rig drill bit according to claim 2, characterized in that: The slide groove includes a transverse slide groove and a longitudinal slide groove which are connected to each other; when the drill rod is lifted, the drill rod rotates in a first direction and drives the slider to slide along the transverse slide groove to the end of the longitudinal slide groove; when the drill rod is lowered, the drill rod rotates in a second direction and drives the slider to slide along the longitudinal slide groove to the end of the transverse slide groove.

4. The rotary drilling rig drill bit according to claim 1, characterized in that: A connecting rod for connecting the drill rod is provided at the middle and lower part of the grab bucket.

5. The rotary drilling rig drill bit according to claim 4, characterized in that: The connecting rod is hinged to the grab bucket.

6. The rotary drilling rig drill bit according to claim 4, characterized in that: A connecting plate is provided at the connection between the connecting rod and the drill rod. The connecting plate is used to be lifted or lowered along with the drill rod. The connecting rod is hinged to the connecting plate.

7. The rotary drilling rig drill bit according to claim 6, characterized in that: A rotating part is provided at the center of the connecting disk, and the rotating part is rotatably connected to the connecting disk to offset the rotational movement of the drill rod.

8. The rotary drilling rig drill bit according to claim 1, characterized in that: A baffle is provided at the lower end of the grab bucket, and the baffle is hinged to the grab bucket to prevent objects in the grab bucket from falling when the two grab buckets are closed.

9. The rotary drilling rig drill bit according to claim 1, characterized in that: The bottom of the cylinder is provided with drill teeth.

10. The rotary drilling rig drill bit according to claim 1, characterized in that: The outer surfaces of the cylinder and the two grab buckets are both provided with spiral patterns.

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