A palm back protection and chip removal structure for a three-tooth drill bit

Abstract

The invention discloses a palm back protection and chip removal structure of a three-tooth drill bit, which relates to the technical field of drilling equipment, and specifically comprises a drill bit claw body, wherein the palm back position of the drill bit claw body is respectively fixedly connected with ball teeth and flat teeth for drilling and grinding, and the ball teeth and flat teeth are arranged in "L" shape at the palm back and palm tip positions of the drill bit claw body in sequence, and a surfacing wear-resistant alloy is fixedly connected at the palm back position of the drill bit claw body near the palm tip, and the surfacing wear-resistant alloy is located at the right side of the ball teeth and flat teeth. By setting the ball teeth, flat teeth and trapezoidal discharge structure, the chip removal flow channel is increased, the chip removal resistance is reduced, and the chip removal is smoother. The problem that the unreasonable design of the palm back protection and slag removal structure of the three-cone drill bit leads to poor rock slag discharge, which not only prolongs the wear time of the rock slag and the three-cone drill, but also makes the rock slag particle size smaller and smaller, thereby easily destroying the sealing system of the three-cone drill and entering the bearing.

Description

Technical Field

[0001] The invention relates to a drilling device, in particular to a palm back protection and chip removal structure of a three-tooth drill bit. Background Art

[0002] Most of the drilling and mining drilling use three-cone drill bits. The three-cone drill bits are composed of three cones mounted on three teeth respectively. The three teeth are assembled and welded together to form a three-cone drill bit. The working principle of the drill bit is: the three-cone drill bit is connected to the drill pipe through a connecting thread. The drilling rig drives the drill pipe to rotate and apply axial pressure. The rotation of the three-cone drill bit drives the three cones to rotate. The carbide teeth on the three cones impact the rock and break the formation. The rock cuttings of the broken formation are discharged out of the hole or well by compressed air or high-pressure mud water provided by the drilling rig. The working environment of three-cone drill bits is relatively harsh, and their service life is generally short. In particular, due to severe wear or poor discharge of rock chips, the rock chips at the bottom of the hole or well repeatedly grind the cone body and alloy teeth, reducing the effective service life of the cone body, alloy teeth and bearings. At the same time, the wear of the rock chips on the palm back and palm tip is aggravated, causing early failure of the seal, and the rock chips enter the bearing gap to accelerate the wear of the bearing, etc., which shortens the service life of the roller bit; or due to unreasonable palm back protection and chip discharge structure, the rock chips are not discharged smoothly, causing the repeated wear of the rock chips on the palm tip of the non-sealed drill bit to be aggravated, resulting in the roller being exposed and falling off, and the bearing failing early, and the drill bit being scrapped prematurely. The unreasonable design of the palm back protection and slag discharge structure of the existing three-cone drill bit leads to poor slag discharge, which can not only prolong the wear time of the rock chips and the three-cone drill, but also make the rock chips smaller and smaller, so that it is easy to damage the sealing system of the three-cone drill and enter the bearing, affecting the working time of the bearing. Summary of the invention

[0003] The object of the present invention is to provide a palm back protection and chip removal structure for a three-tooth drill bit to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A palm back protection and chip removal structure for a three-tooth drill bit comprises a drill claw body, wherein the palm back position of the drill claw body is respectively fixedly connected with ball teeth and flat teeth for drilling and grinding, the ball teeth and flat teeth are arranged in an "L" shape at the palm back and palm tip of the drill claw body in sequence, a surfacing wear-resistant alloy is fixedly connected at a position of the palm back position of the drill claw body close to the palm tip, the surfacing wear-resistant alloy is located on the right side of the ball teeth and flat teeth, and a trapezoidal discharge structure for increasing the discharge amount is provided at the palm side position of the drill claw.

[0006] As a further solution of the present invention: the shape of the surfacing wear-resistant alloy is designed to be an arc.

[0007] As a further solution of the present invention: the inner angle of the trapezoidal discharge structure on the palm tip side is forty-five degrees.

[0008] As a further solution of the present invention: the shape composed of the ball teeth, flat teeth and trapezoidal discharge structure is a "U"-shaped structure.

[0009] As a further solution of the present invention: a triangular prism block is fixedly connected to the surface of the drill bit claw body at a position between the flat teeth and the trapezoidal discharge structure. There are three triangular prism blocks, which are evenly fixedly connected to the surface of the drill bit claw body. The three triangular prism blocks are arranged parallel to one side of the trapezoidal discharge structure.

[0010] As a further solution of the present invention: a small trapezoidal discharge area is provided on the surface of the drill bit claw body at a position where the flat teeth are away from the trapezoidal discharge structure.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] By setting ball teeth, flat teeth and trapezoidal discharge structures, the ball teeth and flat teeth form an "L" shape, which are used in conjunction with the trapezoidal discharge structure. Air is blown at the middle position of the drill claw body to make the ground debris flow to the trapezoidal discharge structure on the "L"-shaped ball teeth and flat teeth structure. The trapezoidal discharge structure is a trapezoidal inclined surface, and an inner angle close to the palm tip is forty-five degrees, so that the debris can be well discharged through the inclined surface, thereby achieving the effect of increasing the chip discharge flow channel, reducing the chip discharge resistance, and making the chip discharge smoother. The problem that the unreasonable design of the palm back protection and the slag discharge structure of the three-cone drill bit leads to poor rock slag discharge, which can not only prolong the wear time of the rock slag and the three-cone drill, but also make the rock slag particle size smaller and smaller, thereby easily destroying the sealing system of the three-cone drill and entering the inside of the bearing is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The rear view is a palm back protection and chip removal structure of a three-tooth drill bit.

[0014] Figure 2 A top view of the palm back protection and chip removal structure of a three-tooth drill bit.

[0015] Figure 3 It is a right-side cross-sectional view of the position of the trapezoidal discharge structure in the palm back protection chip removal structure of a three-tooth drill bit.

[0016] Figure 4 The present invention is a front view of a palm back protection and chip removal structure of a three-tooth drill bit.

[0017] As shown in the figure: 1. Drill bit claw body; 2. Ball teeth; 3. Flat teeth; 4. Overlay welding of wear-resistant alloy; 5. Trapezoidal discharge structure; 6. Triangular prism block; 7. Small trapezoidal discharge area. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.

[0021] See also Figures 1 to 4In an embodiment of the present invention, a palm back protection chip removal structure of a three-tooth drill bit includes a drill claw body 1, and a triangular prism block 6 is fixedly connected to the surface of the drill claw body 1 at a position between the flat tooth 3 and the trapezoidal discharge structure 5. The number of the triangular prism blocks 6 is three, and the three triangular prism blocks 6 are evenly fixedly connected to the surface of the drill claw body 1. The three triangular prism blocks 6 are arranged parallel to one side of the trapezoidal discharge structure 5 to increase the grinding efficiency of the side surface of the drill claw body 1, and also divide the material into two areas through the area, one part is discharged from the trapezoidal discharge structure 5, and the other part is discharged from the small trapezoidal discharge area 7. The surface of the drill claw body 1 is located at a position where the flat tooth 3 is far away from the trapezoidal discharge structure 5. A small trapezoidal discharge area 7 is provided at the drill bit claw body 1 for enhancing discharge and making it faster. The back of the palm of the drill bit claw body 1 is fixedly connected with a ball tooth 2 and a flat tooth 3 for drilling and grinding. The ball tooth 2 and the flat tooth 3 are arranged in an "L" shape at the back of the palm and the palm tip of the drill bit claw body 1 respectively, so that the back of the palm tip is effectively protected, and the flat teeth are used at the rear end to reduce the chip removal resistance and make the chip removal smoother. The back of the palm of the drill bit claw body 1 is fixedly connected with a surfacing wear-resistant alloy 4 near the palm tip. The surfacing wear-resistant alloy 4 is designed to be arc-shaped, with high adaptability, better cooperation during use, and less likely to have problems. The surfacing wear-resistant alloy 4 is located on the right side of the ball tooth 2 and the flat tooth 3.

[0022] A trapezoidal discharge structure 5 for increasing the discharge amount is provided on the palm side of the drill bit claw. The inner angle of the trapezoidal discharge structure 5 located on the palm tip side is forty-five degrees. A trapezoidal chip discharge structure with a 45° angle is designed to increase the chip discharge flow channel and reduce the chip discharge resistance. The shape composed of the ball teeth 2, the flat teeth 3 and the trapezoidal discharge structure 5 is a "U"-shaped structure. This arrangement allows the crushed materials to directly reach the position of the trapezoidal discharge structure 5 after passing through the "L"-shaped position, which is convenient for discharge.

[0023] The working principle of the present invention is:

[0024] During use, the drill claw body 1 works, and air is discharged from the middle position. The gas blows the crushed materials, and the crushed materials reach the palm tip through the airflow, while the "L"-shaped design of the ball teeth 2 and the flat teeth 3 also works. The crushed materials flow on the "L"-shaped ball teeth 2 and the flat teeth 3, and the crushed materials will be blown by the air to the trapezoidal discharge structure 5 for discharge. First, a trapezoidal chip discharge structure 5 with a forty-five-degree angle is designed on the palm side to increase the chip discharge flow channel and reduce the chip discharge resistance; second, the unique L-shaped palm back and palm tip protection design can effectively protect the palm tip and back of the palm, and the flat teeth 3 are used at the rear end to reduce the chip discharge resistance and make the chip discharge smoother. At present, we have conducted flow field analysis and optimized design on the chip discharge channels on the palm back side and the palm back of the drill claw body 1. From the actual use situation, the wear of the palm back and palm tip meets the design requirements, and the slag removal effect is good.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention, and the contents not described in detail in this specification shall belong to the prior art known to professional and technical personnel in the field.

Claims

1. A palm back protection and chip removal structure of a three-tooth drill bit, comprising a drill bit claw body (1), characterized in that: The back of the palm of the drill jaw body (1) is respectively fixedly connected with a ball tooth (2) and a flat tooth (3) for drilling and grinding. The ball tooth (2) and the flat tooth (3) are arranged in an "L" shape at the back of the palm and the palm tip of the drill jaw body (1). A surfacing wear-resistant alloy (4) is fixedly connected at the back of the palm of the drill jaw body (1) near the palm tip. The surfacing wear-resistant alloy (4) is designed to be in an arc shape. The surfacing wear-resistant alloy (4) is located on the right side of the ball tooth (2) and the flat tooth (3). A trapezoidal discharge structure (5) for increasing the discharge amount is provided at the palm side of the drill jaw. The inner angle of the trapezoidal discharge structure (5) located on the palm tip side is forty-five degrees. A triangular prism block (6) is fixedly connected to the surface of the drill claw body (1) at a position between the flat tooth (3) and the trapezoidal discharge structure (5). The number of the triangular prism blocks (6) is three. The three triangular prism blocks (6) are evenly fixedly connected to the surface of the drill claw body (1). The three triangular prism blocks (6) are arranged parallel to one side of the trapezoidal discharge structure (5). A small trapezoidal discharge area (7) is provided on the surface of the drill claw body (1) at a position where the flat tooth (3) is away from the trapezoidal discharge structure (5).

2. The palm back protection and chip removal structure of a three-tooth drill according to claim 1 is characterized in that: The shape formed by the ball teeth (2), the flat teeth (3) and the trapezoidal discharge structure (5) is a "U"-shaped structure.

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