Drill bit of rotary drilling rig

Abstract

The utility model relates to the technical field of building machinery, and provides a drill bit of a rotary drilling rig, which comprises a drill cylinder with a cavity, an opening at the bottom of the drill cylinder, a plurality of drill teeth circumferentially arranged at the edge of the opening at the bottom of the drill cylinder, a top plate arranged at the top of the drill cylinder, a connecting component arranged above the top plate, and a clamping component arranged on the inner wall of the drill cylinder. The clamping assembly is used for clamping and fixing the rock breaking assembly, the rock breaking assembly comprises a rock breaking power piece, the output end of the rock breaking power piece faces the bottom of the drill barrel and is used for breaking a rock core, the rock breaking assembly is detachably arranged on the inner wall of the drill barrel through the clamping assembly, and the rock breaking power piece is arranged to be an oil hammer. The axis of the output end of the oil hammer is parallel to the axis of the drilling barrel, a gap is reserved between the top plate and the drilling barrel, reinforcing ribs connected with the inner wall of the drilling barrel are arranged on the top plate, and the connecting assembly comprises a connecting shaft used for being connected with a drilling rod. According to the utility model, the rock core entering the drill bit can be continuously vibrated, so that the rock core is broken, and the hole digging efficiency of the drill bit is improved.

Description

Technical Field

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

[0002] At present, in the construction of large-diameter piles in civil engineering foundation projects, bridge projects, foundation pit excavation and support, the drilling operation is generally carried out by a rotary drilling rig. The rotary drilling rig uses a drill bit to rotate and dig the stratum to gradually take soil and repeatedly cycle to form holes. The drill bit of a traditional rotary drilling rig generally has difficulty breaking rock strata and cores, and it is not easy to break large pieces of rock cores during the rotary drilling process, which makes the rotary drilling construction efficiency low, and the device is prone to damage, and the economy is poor.

[0003] Therefore, in view of the above problems, a rotary drilling rig drill bit is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and develops a rotary drilling rig drill bit. The utility model can continuously vibrate the rock core entering the drill bit to break the rock core and improve the drilling efficiency of the drill bit.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A rotary drilling rig drill bit comprises a drill barrel with a cavity, the bottom of the drill barrel is open, a plurality of drill teeth are arranged circumferentially on the edge of the bottom opening of the drill barrel, a top plate is arranged on the top of the drill barrel, a connecting assembly is arranged above the top plate, a clamping assembly is arranged on the inner wall of the drill barrel, the clamping assembly is used to clamp and fix a rock breaking assembly, the rock breaking assembly comprises a rock breaking power part, the output end of the rock breaking power part faces the bottom of the drill barrel, and is used to break the rock core.

[0007] Preferably, the rock breaking assembly is detachably arranged on the inner wall of the drill barrel through a clamping assembly, and the rock breaking power part is arranged as an oil hammer, and the axis of the output end of the oil hammer is arranged parallel to the axis of the drill barrel.

[0008] Preferably, a gap is left between the top plate and the drill tube, and a reinforcing rib connected to the inner wall of the drill tube is provided on the top plate.

[0009] Preferably, the connecting assembly comprises a connecting shaft, and the connecting shaft is used for connecting the drill rod.

[0010] Preferably, the clamping assembly includes a clamping seat and a movable clamping plate. The clamping seat is arranged on the inner wall of the drill barrel, and an adjustment slot is provided on the clamping seat. The movable clamping plate includes a left clamping plate and a right clamping plate. Both the left clamping plate and the right clamping plate can contact the outer wall of the rock breaking power component, and the contact position is set to fit the shape of the outer wall of the rock breaking power component. Fixing holes are provided on the left clamping plate and the right clamping plate. The fixing holes are connected to the movable clamping plate by a rotating shaft. A positioning bolt is slidably arranged in the adjusting slot, and the positioning bolt is connected to the movable clamping plate.

[0011] Preferably, the clamping assembly also includes two limit plates, which are respectively arranged on the inner walls of the drill barrel on the upper and lower sides of the clamping seat, and the limit plates are in contact with the upper and lower ends of the rock breaking power component to limit the upper and lower positions of the rock breaking power component.

[0012] Preferably, a protective plate is also included, which includes a left protective plate and a right protective plate. The left protective plate and the right protective plate are both rotatably set on the clamping seat and are respectively located on both sides of the rock breaking power part. The side edges of the left protective plate and the right protective plate away from the clamping seat can be connected by a connecting bolt.

[0013] Preferably, the left guard plate and the right guard plate are connected to form a bucket-shaped cavity, which is wide at the top and narrow at the bottom. The main body of the rock breaking power component is located in the bucket-shaped cavity, and the output end of the rock breaking power component extends out of the bottom of the bucket-shaped cavity to facilitate rock breaking.

[0014] The effects provided in the utility model content are only the effects of the embodiments, not all the effects of the utility model. The above technical solution has the following advantages:

[0015] 1. The utility model arranges a rock-breaking power part on the inner wall of the drill tube, and the output end of the rock-breaking power part faces the bottom of the drill tube, that is, the direction in which the core enters the drill tube. The output end of the rock-breaking power part can break the core through continuous vibration, thereby increasing the fracture rate of the core, no longer affecting the excavation of the drill bit, and improving the drilling efficiency;

[0016] 2. The utility model realizes the detachable fixation of the rock breaking power part by setting a clamping assembly, which is convenient for the maintenance and replacement of the device, and can be set in drill bits of different diameters for application. At the same time, the size of the rock breaking power part can be changed, which improves the practicality and economy;

[0017] 3. The utility model provides a protective plate, and the bottom of the protective plate is enclosed in a bucket shape to protect the rock breaking power component, while not affecting the rock breaking power component to break the rock layer, thereby improving practicality and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0021] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0022] Figure 4 It is a partial cross-sectional structural schematic diagram of the embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the front view of the embodiment of the utility model after the protective plate is removed;

[0024] Figure 6 It is a schematic structural diagram of the clamping assembly of an embodiment of the utility model.

[0025] In the figure, 1, drill barrel; 2, drill teeth; 3, top plate; 4, connecting assembly; 5, clamping assembly; 6, rock breaking assembly; 7, reinforcing ribs; 8, protective plate; 41, connecting shaft; 51, clamping seat; 52, movable splint; 511, adjusting slot; 521, left splint; 522, right splint; 53, fixing hole; 54, limit plate; 61, rock breaking power part; 81, left guard plate; 82, right guard plate. DETAILED DESCRIPTION

[0026] 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 of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0027] like Figure 1-Figure 6 As shown, the utility model provides a technical solution:

[0028] A rotary drilling rig drill bit comprises a drill barrel 1 with a cavity, the bottom of the drill barrel 1 is open, a plurality of drill teeth 2 are circumferentially arranged on the edge of the bottom opening of the drill barrel 1, the drill teeth 2 are used for rotary drilling of rock formations, a top plate 3 is arranged on the inner top of the drill barrel 1, a connecting assembly 4 is arranged above the top plate 3, the connecting assembly 4 is used for connecting a drill rod of the rotary drilling rig, a clamping assembly 5 is arranged on the inner wall of the drill barrel 1, the clamping assembly 5 is used for clamping and fixing a rock breaking assembly 6, the rock breaking assembly 6 comprises a rock breaking power part 61, the output end of the rock breaking power part 61 faces the bottom of the drill barrel 1, and is used for breaking the rock core.

[0029] In this embodiment, the rock breaking assembly 6 is detachably arranged on the inner wall of the drill barrel 1 through the clamping assembly 5, and the rock breaking power part 61 is preferably arranged as an oil hammer. The output end of the oil hammer can vibrate continuously to facilitate the vibration breaking of the core. The axis of the output end of the oil hammer is arranged parallel to the axis of the drill barrel 1, thereby improving the vibration breaking efficiency.

[0030] In this embodiment, a gap is left between the top plate 3 and the drill tube 1 to prevent negative pressure from being generated inside the drill tube 1 during drilling and damaging the drill bit, and a reinforcing rib 7 connected to the inner wall of the drill tube 1 is provided on the top plate 3 to improve the firmness of the top plate 3.

[0031] In this embodiment, the connecting assembly 4 includes a connecting shaft 41, and a threaded section is arranged at the upper end of the connecting shaft 41, so that the connecting shaft 41 is convenient for connecting the drill rod and the drill rod drives the drill bit to rotate as a whole for excavation, thereby improving the practicability of the device.

[0032] In another embodiment, the connecting shaft 41 is configured as a polygonal shaft, and the connecting component 4 also includes connecting ribs, which are evenly arranged between the connecting shaft 41 and the top plate 3 to enhance the stability of the connection between the connecting shaft 41 and the top plate 3, thereby improving the safety of the device.

[0033] In this embodiment, the clamping assembly 5 includes a clamping seat 51 and a movable clamping plate 52. The clamping seat 51 is arranged on the inner wall of the drill tube 1. The clamping seat 51 is provided with an adjustment groove 511, and the adjustment groove 511 is set as an arc groove. The movable clamping plate 52 includes a left clamping plate 521 and a right clamping plate 522. The left clamping plate 521 and the right clamping plate 522 can both contact with the outer wall of the rock breaking power part 61, and the contact position is set to fit the shape of the outer wall of the rock breaking power part 61. The left clamping plate 521 and the right clamping plate 522 are both provided with a fixing hole 53. The fixing hole 53 is connected to the movable clamping plate 52 through a rotating shaft. The left clamping plate 521 The left and right clamping plates 522 can both rotate around the rotating shaft, and the center of the arc of the adjusting groove 511 coincides with the center of the rotating shaft, so that when the left and right clamping plates 521 and 522 rotate around the rotating shaft, the end close to the adjusting groove 511 slides along the arc of the adjusting groove 511, and a positioning bolt is slidingly arranged in the adjusting groove 511, and the positioning bolt is connected to the movable clamping plate 52. When the movable clamping plate 52 needs to be clamped, it is only necessary to rotate and adjust the angles of the left and right clamping plates 521, 522 and then tighten the nut of the positioning bolt to fix the position of the movable clamping plate 52 for clamping the rock breaking power part 61, thereby improving the practicability of the device.

[0034] In another embodiment, a flexible layer such as a rubber layer is provided on the contact surface between the left clamping plate 521 and the right clamping plate 522 and the rock breaking power part 61 to avoid damage to the rock breaking power part 61 during the clamping process, thereby improving the stability and practicality of the device.

[0035] In this embodiment, the clamping assembly 5 also includes a limit plate 54, which includes two plates, which are respectively arranged on the inner wall of the drill tube 1 on the upper and lower sides of the clamping seat 51, and the limit plate 54 is in contact with the upper and lower ends of the rock breaking power component 61, and is used to limit the upper and lower ends of the rock breaking power component 61 to prevent the rock breaking power component 61 from falling off when the output end of the rock breaking power component 61 vibrates, thereby improving the stability of the device during use.

[0036] In this embodiment, a protective plate 8 is also included, and the protective plate 8 includes a left protective plate 81 and a right protective plate 82. The left protective plate 81 and the right protective plate 82 are both rotatably set on the clamping seat 51 through a protective plate rotating shaft. The axis of the protective plate rotating shaft is parallel to the axis of the output end of the rock breaking power component 61, and are respectively located on both sides of the rock breaking power component 61. The left protective plate 81 and the right protective plate 82 are respectively arranged on one side away from the clamping seat 51 to form a rectangular tooth groove, and a connecting hole is vertically opened in the center of the rectangular tooth groove. A connecting bolt is inserted in the connecting hole to connect the left protective plate 81 and the right protective plate 82 to avoid the left protective plate 81 and the right protective plate 82 from opening during the use of the device, thereby improving the safety of the rock breaking power component 61 during the use of the device.

[0037] In this embodiment, the bottom of the left guard plate 81 and the right guard plate 82 are both configured as arc panels that are wide at the top and narrow at the bottom. The left guard plate 81 and the right guard plate 82 are assembled and connected to form a bucket-shaped cavity that is wide at the top and narrow at the bottom. The main body of the rock breaking power component 61 is located in the bucket-shaped cavity, and a hole is opened at the bottom of the bucket-shaped cavity. The output end of the rock breaking power component extends out of the bottom of the bucket-shaped cavity through the hole to facilitate rock breaking.

[0038] In another embodiment, a plurality of clamping assemblies 5, rock breaking assemblies 6 and protective plates 8 may be uniformly arranged circumferentially inside the drill tube 1 to improve the fracture effect on the core and improve the construction efficiency of the device.

[0039] Working principle: First, open the protective plate 8 and the movable clamp plate 52, and place the output end of the oil hammer on the limit plate 54 with the output end facing the bottom of the drill tube 1, so that the limit plate 54 limits the upper and lower ends of the oil hammer body; then adjust the angle position of the left clamp plate 521 and the right clamp plate 522, so that the left clamp plate 521 and the right clamp plate 522 clamp the main body of the oil hammer, and fix the position of the left clamp plate 521 and the right clamp plate 522 by the positioning bolt to fix the oil hammer; then rotate the left guard plate 81 and the right guard plate 82, so that the left guard plate 81 and the right guard plate 82 The side away from the inner wall of the drill barrel 1 is spliced ​​and clamped, and is fixed by a connecting bolt to avoid opening, so as to protect the oil hammer and prevent the oil hammer from being damaged by the core. At this time, the vibration output end of the oil hammer is located outside the bottom end of the range enclosed by the protective plate 8 to facilitate the breaking of the core; then the drill rod of the rotary drilling rig is connected through the connecting shaft 41 to drive the drill bit to rotate as a whole through the drill rod; then the drill tooth 2 and the oil hammer are turned on, and the drill rod drives the drill bit to rotate and feed to drill, the drill tooth 2 excavates the edge of the core, and the core entering the cavity of the drill barrel 1 is continuously vibrated by the oil hammer to break the core.

[0040] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships 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 referred device or element 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.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotary drilling rig drill bit, comprising a drill barrel (1) with a cavity, characterized in that: The bottom of the drill barrel (1) is open, and a plurality of drill teeth (2) are arranged in the circumferential direction of the edge of the bottom opening of the drill barrel (1). A top plate (3) is arranged on the top of the drill barrel (1), and a connecting assembly (4) is arranged above the top plate (3). A clamping assembly (5) is arranged on the inner wall of the drill barrel (1), and the clamping assembly (5) is used to clamp and fix a rock breaking assembly (6). The rock breaking assembly (6) includes a rock breaking power component (61), and the output end of the rock breaking power component (61) faces the bottom of the drill barrel (1) and is used to break the rock core.

2. A rotary drilling rig drill bit according to claim 1, characterized in that: The rock breaking component (6) is detachably arranged on the inner wall of the drill tube (1) via the clamping component (5); the rock breaking power component (61) is arranged as an oil hammer; the axis of the output end of the oil hammer is arranged parallel to the axis of the drill tube (1).

3. A rotary drilling rig drill bit according to claim 2, characterized in that: A gap is left between the top plate (3) and the drill tube (1), and a reinforcing rib (7) connected to the inner wall of the drill tube (1) is provided on the top plate (3).

4. A rotary drilling rig drill bit according to claim 3, characterized in that: The connecting assembly (4) comprises a connecting shaft (41), and the connecting shaft (41) is used to connect a drill rod.

5. A rotary drilling rig drill bit according to claim 4, characterized in that: The clamping assembly (5) comprises a clamping seat (51) and a movable clamping plate (52). The clamping seat (51) is arranged on the inner wall of the drill tube (1). An adjusting groove (511) is provided on the clamping seat (51). The movable clamping plate (52) comprises a left clamping plate (521) and a right clamping plate (522). Both the left clamping plate (521) and the right clamping plate (522) can contact the outer wall of the rock breaking power component (61), and the contact position is arranged to fit the shape of the outer wall of the rock breaking power component (61). Both the left clamping plate (521) and the right clamping plate (522) are provided with a fixing hole (53). The fixing hole (53) and the movable clamping plate (52) are connected via a rotating shaft. A positioning bolt is slidably provided in the adjusting groove (511), and the positioning bolt is connected to the movable clamping plate (52).

6. A rotary drilling rig drill bit according to claim 5, characterized in that: The clamping assembly (5) further comprises two limit plates (54) which are respectively arranged on the inner wall of the drill tube (1) at the upper and lower sides of the clamping seat (51), and the limit plates (54) are in contact with both the upper and lower ends of the rock breaking power component (61) for limiting the upper and lower positions of the rock breaking power component (61).

7. A rotary drilling rig drill bit according to claim 6, characterized in that: The invention also comprises a protective plate (8), the protective plate (8) comprising a left protective plate (81) and a right protective plate (82), the left protective plate (81) and the right protective plate (82) are both rotatably arranged on the clamping seat (51), and are respectively located on both sides of the rock breaking power member (61), and the side edges of the left protective plate (81) and the right protective plate (82) away from the clamping seat (51) can be connected by a connecting bolt.

8. The rotary drilling rig drill bit according to claim 7, characterized in that: The left guard plate (81) and the right guard plate are connected to form a bucket-shaped cavity, which is wide at the top and narrow at the bottom. The main body of the rock-breaking power component (61) is located in the bucket-shaped cavity, and the output end of the rock-breaking power component extends out of the bottom end of the bucket-shaped cavity to facilitate rock breaking.

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