Improved drill bit for cone barrel of rotary drilling rig

Abstract

The utility model relates to an improved drill bit for a cone barrel of a rotary drilling rig, which comprises a cone barrel drill, and a spiral guide groove is connected on the outer wall of the cone barrel drill and used for drainage and discharge of rock ballast. The section of the spiral guide groove is L-shaped; the lower end of the spiral guide groove is flush with the lower end face of the cone barrel drill. A spherical tooth hob assembly is arranged on the side wall of the lower end of the cone barrel drill and comprises a mounting plate, the mounting plate is connected to the side wall of the lower end of the cone barrel drill, and the lower end face of the mounting plate is rotationally connected with a spherical tooth hob through a mounting base. The utility model aims to overcome the defects in the prior art, and provides the improved drill bit for the cone barrel of the rotary drilling rig, so that the hole-forming construction efficiency of the drilling rig is improved.

Description

Technical Field

[0001] The utility model relates to an improved drill bit of a cone barrel of a rotary drilling rig. Background Art

[0002] In recent years, with the development and improvement of social productivity, in engineering construction, the construction efficiency of pile foundation has also become a key link to improve efficiency in various projects. Because of the high efficiency of rotary drilling rigs, the utilization rate of rotary drilling rigs is getting higher and higher. The cone barrel drill bit of the rotary drilling rig has obvious drilling effect on high-strength rock, but the existing drilling rig structure cannot clean the slag in time, resulting in the ground slag being deposited at the bottom, causing the drill bit to repeatedly grind the ground slag, affecting the drilling efficiency. Therefore, in view of the above problems, an improved cone barrel drill bit of a rotary drilling rig is proposed. Utility Model Content

[0003] The utility model aims to overcome the existing defects and provide an improved drill bit for a cone barrel of a rotary drilling rig, thereby improving the construction efficiency of the drilling rig in forming holes.

[0004] The technical solution to achieve the above purpose is: an improved roller barrel drill bit for a rotary drilling rig, including a roller barrel drill, on the outer wall of which a spiral guide groove is connected for draining and discharging slag; the cross-section of the spiral guide groove is L-shaped; the lower end of the spiral guide groove is flush with the lower end surface of the roller barrel drill.

[0005] Preferably, a ball tooth hob assembly is provided on the lower end side wall of the roller drill, and the ball tooth hob assembly includes a mounting plate, which is connected to the lower end side wall of the roller drill, and the lower end surface of the mounting plate is rotatably connected to the ball tooth hob through a mounting seat.

[0006] Preferably, a first through hole is provided on the upper side wall of the cone drill, and a plurality of second through holes are provided on the top of the cone drill.

[0007] Preferably, the spiral guide groove is welded to the side wall of the cone drill bit.

[0008] Preferably, the top of the cone drill bit is connected to a flange, which is connected to the drill rod through the flange.

[0009] The beneficial effects of the utility model are as follows: the cone barrel of the rotary drilling rig improves the drill bit, and by arranging an L-shaped spiral guide groove, the ground slag is drained upward through the guide groove while the rotary drilling rig rotates during drilling, and enters the inside of the drill bit through the hole opened in advance on the side of the upper drill bit, so that the bottom slag is cleared in time, so that the drill bit is in direct contact with the unground rock, the construction efficiency of the drilling rig is improved, and the cost is economically saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an axonometric view of the improved drill bit of the cone barrel of the rotary drilling rig of the utility model;

[0011] Figure 2 It is a front view of the improved drill bit of the cone barrel of the rotary drilling rig of the utility model;

[0012] Figure 3 It is a side view of the improved drill bit of the cone barrel of the rotary drilling rig of the utility model;

[0013] Figure 4 It is a top view of the improved drill bit of the cone barrel of the rotary drilling rig of the utility model;

[0014] Figure 5 It is a bottom view of the improved drill bit of the cone barrel of the rotary drilling rig of the utility model;

[0015] Figure 6 It is a schematic diagram of the spiral guide groove of the utility model.

[0016] In the figure: 1. roller drill bit; 2. spiral guide groove; 3. mounting plate; 4. mounting seat; 5. ball gear hob; 6. first through hole; 7. second through hole; 8. flange. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] The utility model will be further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-6As shown, an improved roller barrel drill bit for a rotary drilling rig includes a roller barrel drill 1, and a spiral guide groove 2 is connected to the outer wall of the roller barrel drill 1 for draining and discharging slag; the cross-section of the spiral guide groove 2 is L-shaped; the lower end of the spiral guide groove 2 is flush with the lower end surface of the roller barrel drill 1. A ball tooth hob assembly is provided on the lower end side wall of the roller barrel drill 1, and the ball tooth hob assembly includes a mounting plate 3, and the mounting plate 3 is connected to the lower end side wall of the roller barrel drill 1. The lower end surface of the mounting plate 3 is rotatably connected to the ball tooth hob 5 through a mounting seat 4. The ball tooth hob 5 is more wear-resistant than the roller drill bit and is more excellent for hard rock drilling. A first through hole 6 is provided on the upper end side wall of the roller barrel drill 1, and a plurality of second through holes 7 are provided on the top of the roller barrel drill 1. The spiral guide groove 2 is welded to the side wall of the roller barrel drill 1. A flange 8 is connected to the top of the roller barrel drill 1, and is connected to the drill rod through the flange 8. The interior of the roller barrel drill 1 is hollow;

[0020] During drilling, the cone drill 1 rotates to drive the ball-toothed hob 5 to rotate and grind and drill. The ground stone slag will move to the upper end of the side wall of the cone drill 1 through the spiral guide groove 2, enter the top plate on the top of the cone drill 1 through the first through hole 6, and then enter the inside of the cone drill 1 through the second through hole 7 on the top plate. By setting the spiral guide groove 2, the ground stone slag can be discharged in time, avoiding the drill bit from repeatedly grinding the ground stone slag and affecting the drilling efficiency.

[0021] The improved drill bit of the cone barrel of the rotary drilling rig is provided with an L-shaped spiral guide groove. When the rotary drilling rig is rotating, the ground slag is drained to the top through the guide groove, and enters the inside of the drill bit through the hole opened in advance on the upper side of the drill bit, so that the bottom slag is removed in time, so that the drill bit directly contacts the unground rock, improves the construction efficiency of the drilling rig, and thus saves costs economically. At the same time, when drilling inclined piles, because the spiral guide groove is L-shaped, after the full casing and the side are drilled, it is prevented that the drill bit causes cuts to the casing and the rock hole wall after the drilling process.

[0022] 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 above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An improved drill bit for a rotary drilling rig, characterized in that: It comprises a roller drill (1), on the outer wall of which a spiral guide groove (2) is connected for draining and discharging slag; the cross section of the spiral guide groove (2) is L-shaped; the lower end of the spiral guide groove (2) is flush with the lower end surface of the roller drill (1).

2. The improved drill bit of the cone cylinder of the rotary drilling rig according to claim 1, characterized in that: A ball tooth hob assembly is provided on the lower end side wall of the cone drill (1), and the ball tooth hob assembly comprises a mounting plate (3), the mounting plate (3) is connected to the lower end side wall of the cone drill (1), and the lower end surface of the mounting plate (3) is rotatably connected to the ball tooth hob (5) via a mounting seat (4).

3. The improved drill bit of the cone cylinder of the rotary drilling rig according to claim 1, characterized in that: A first through hole (6) is provided on the upper side wall of the cone drill (1), and a plurality of second through holes (7) are provided on the top of the cone drill (1).

4. The improved drill bit of the cone cylinder of the rotary drilling rig according to claim 1, characterized in that: The spiral guide groove (2) is welded to the side wall of the cone drill (1).

5. The improved cone-cylinder drill bit for a rotary drilling rig according to claim 1, characterized in that: The top of the cone drill (1) is connected to a flange (8), which is connected to a drill rod via the flange (8).

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