Impeller type quick-advancing drill bit

Abstract

The utility model discloses an impeller-type fast-forward drill bit which comprises a drill bit body, one end of the drill bit body is provided with a spline section used for being fixedly connected with a drill rod, the other end of the drill bit body is provided with a hemisphere, a conical transition section is arranged between the hemisphere and the spline section, and a plurality of alloy ridges are distributed on the hemispherical surface of the hemisphere. The alloy ridges are all distributed around the center point of the top end of the hemisphere in a diverging and circumferential mode, powder discharging grooves are defined by the adjacent alloy ridges, spherical teeth are distributed on the alloy ridges, and a high-pressure air hole is formed in the center of the drill bit body in a penetrating mode. The semi-spherical drill bit is simple in structural design and convenient to operate, through the structure of the semi-spherical body and the conical transition section, rock drilling chambering positioning is accurate, the drilling footage speed is high, holes are standard, it can be guaranteed that the hole diameters are consistent, the powder discharging groove is formed in the end face, rock residues can be smoothly discharged, repeated crushing is avoided, the service life of the drill bit is greatly prolonged, and the service life of the drill bit is prolonged. Sampling personnel can sample conveniently and quickly, and the use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of geological rock drilling, in particular to a pulsator-type fast-feed drill bit. Background Art

[0002] Drilling or exploration is the use of deep drilling mechanical engineering technology to exploit underground or seabed natural resources, or to take actual profiles of strata, extract physical samples, provide experiments to obtain relevant data, etc. Conventional drilling is the use of drilling machinery and technology to obtain rock and mineral cores below the surface to make reliable evaluations of geological and mineral resource parameters; drilling is an important technical means in geological exploration. Use a drill to drill from the surface downward to form a cylindrical borehole in the stratum to identify and divide the strata. Cores, ore samples, and soil samples can be obtained from different depths in the borehole for analysis and research to determine the physical and mechanical properties and indicators of rocks and soil layers to provide design needs.

[0003] The drill rigs used are mainly divided into two types: rotary and impact. For example, the patent publication number is: CN 103628821 A, which discloses a coring drill bit suitable for soft and hard drilling objects, including a drill bit base and a conical head arranged below the drill bit base, the drill bit base is a hollow cylindrical shape, a drill rod connection part is arranged at the upper end of the drill bit, the inner diameter of the opening of the conical head is smaller than the inner diameter of the hollow cylinder of the drill bit base, an outer spiral is arranged on the outer surface of the drill bit base, the inclined surface and the bottom surface of the conical head are grooved, a cutting tool of a corresponding shape is installed in the groove, the cutting tool is hinged in the groove by rivets, a limiter for limiting the initial position of the cutting tool is arranged between the rivet and the hole on the cutting tool, there is a high temperature resistant elastic pad between the limiter and the bottom of the groove, and between the cutting tool and the groove.

[0004] Although this patent can achieve simultaneous crushing of soft and hard rocks; there is a gap between the drill bit body and the hole wall to ensure smooth powder discharge, the lower end of the cutting tool exceeds the inner diameter of the drill bit body, and the core can be smoothly taken. The cutting heat and friction heat are discharged from the bottom of the hole through the drill cuttings, reducing heat power consumption. However, in actual operation, the drill bit cannot be accurately positioned, the hole is easy to deviate, resulting in irregular holes, inconsistent hole sizes, etc., which causes the drill bit to be stuck and scrapped, and the service life is short. In addition, the installation process is cumbersome, resulting in low sampling efficiency of the sampling personnel, which brings a series of problems to actual production and also increases production costs. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects and shortcomings of the prior art, provide a pulsator-type fast-feed drill bit, and solve various problems existing in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pulsator-type fast-feed drill bit comprises a drill bit body, one end of the drill bit body is provided with a spline section for connecting and fixing with a drill rod, the other end is provided with a hemisphere, a conical transition section is provided between the hemisphere and the spline section, a plurality of alloy ridges are distributed on the hemispherical surface of the hemisphere, the alloy ridges are all centered on the center point of the top of the hemisphere, and are distributed in a divergent circle around, powder drainage grooves are formed between adjacent alloy ridges, and ball teeth are distributed on the alloy ridges, and a high-pressure air hole is provided through the center of the drill bit body.

[0008] Both sides of the alloy ridge are inclined surfaces.

[0009] The alloy ridge is an arc-shaped structure, and a plurality of alloy ridges are combined to form a spiral convex ridge structure that is convenient for drilling.

[0010] The plurality of alloy ridges are evenly arranged in a rotating shape on the circumference of the hemispherical surface of the hemisphere, and the rotating directions thereof are in the same direction.

[0011] The powder discharge groove includes a primary powder discharge groove, a secondary powder discharge groove and a tertiary powder discharge groove. The primary powder discharge groove is located between the front end areas of adjacent alloy ridges, the secondary powder discharge groove is located at the position of the bracket in the tail area of ​​adjacent alloy ridges, and is recessed inwardly to correspond to the primary powder discharge groove. The tertiary powder discharge groove is located at the conical transition section of the hemisphere, and is recessed inwardly to correspond to the secondary powder discharge groove.

[0012] The ball teeth are of a cone-shaped structure and are evenly distributed on the end surface of the alloy ridge.

[0013] The ball teeth are coated with a hard coating.

[0014] The bottom root of the ball gear is a columnar structure, and the root is provided with threads, and threaded mounting holes for mounting the ball gear are distributed on the alloy ridge.

[0015] The diameter of the high-pressure air hole is 15-20 mm.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model has a simple structural design and is easy to operate. Through the structure of the hemispherical body and the conical transition section, the rock drilling and hole expansion positioning is accurate, the footage speed is fast, the hole is standardized, and the hole size can be guaranteed to be consistent;

[0018] The structure of several alloy ridges on the hemispherical surface of the hemispherical body at the front end of the drill bit body forms cutting teeth that are convenient for drilling, and the alloy ridges are evenly distributed on the surface of the hemispherical end and bear approximately equal rock breaking areas, which can ensure that the teeth are evenly stressed during rock breaking and avoid premature damage to the side teeth due to uneven stress during rock drilling;

[0019] In addition, the end face is provided with a powder discharge groove, so that the rock debris can be discharged smoothly, avoiding repeated crushing and greatly extending the service life of the drill bit;

[0020] The structure of the tapered transition section makes the hole less likely to deviate, which is conducive to hole forming, thereby ensuring the consistency of the hole size, and at the same time facilitates smooth powder discharge and avoids the phenomenon of drill jamming;

[0021] In summary, the overall structural design is reasonable, the installation and use process is simple, the sampling for the samplers is convenient and fast, and it meets the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the main structure diagram of the utility model;

[0023] Figure 2 for Figure 1 End face top view;

[0024] Figure 3 This is the main cross-sectional view of the utility model;

[0025] Figure 4 This is a cross-sectional view of the tail of the utility model;

[0026] Reference numerals:

[0027] 1. Drill bit body; 2. Spline section; 3. Hemisphere; 4. Alloy ridge; 5. Primary powder discharge groove; 6. Secondary powder discharge groove; 7. Third-level powder discharge groove; 8. Ball teeth; 9. High-pressure air hole. DETAILED DESCRIPTION

[0028] 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 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.

[0029] See attached Figure 1-4 ;

[0030] A pulsator-type fast-feed drill bit comprises a drill bit body 1. A spline section 2 for connecting and fixing with a drill rod is provided at one end of the drill bit body 1. The structure of the spline section facilitates the quick connection between the drill bit and the drill rod. A hemisphere 3 is provided at the other end. A conical transition section is provided between the hemisphere 3 and the spline section. A plurality of alloy ridges 4 are distributed on the hemisphere surface of the hemisphere 3. The alloy ridges 4 are all centered on the top center point of the hemisphere 3 and are distributed in a divergent circle around. Powder drainage grooves are formed between adjacent alloy ridges 4. Ball teeth 8 are distributed on the alloy ridges 4. A high-pressure air hole 9 is provided through the center of the drill bit body 1. The diameter of the high-pressure air hole 9 is 15-20 mm.

[0031] Furthermore, both sides of the alloy ridge 4 are inclined surfaces. The alloy ridge 4 is an arc-shaped structure, and a plurality of alloy ridges 4 are combined to form a spiral convex ridge structure that is convenient for drilling. The structural design of the spiral convex ridge spiral lip surface on the surface of the hemisphere can crush various rocks under different rock geological conditions, increase the use range of the drill bit in the formation, reduce friction and facilitate heat dissipation, avoid abnormal wear, and prevent complex situations, thereby increasing the drilling speed and drill bit footage, reducing accidents such as drill burning and drill jamming, and increasing the life of the drill bit.

[0032] Furthermore, a plurality of alloy ridges 4 are evenly arranged in a rotating shape on the hemispherical surface of the hemispherical body 3, and the rotating direction is the same. The arrangement can be clockwise or counterclockwise, and the clockwise arrangement is adopted in the drawings of the embodiments of the present application.

[0033] Furthermore, the powder discharge groove includes a primary powder discharge groove 5, a secondary powder discharge groove 6 and a tertiary powder discharge groove 7. The primary powder discharge groove 5 is located between the front end regions of adjacent alloy ridges, the secondary powder discharge groove 6 is located at the position of the bracket of the tail region of the adjacent alloy ridges, and is recessed inwardly corresponding to the primary powder discharge groove 5. The tertiary powder discharge groove 7 is located at the conical transition section of the hemisphere 3, and is recessed inwardly corresponding to the secondary powder discharge groove 6. Through the structure of the primary powder discharge groove 5, the secondary powder discharge groove 6 and the tertiary powder discharge groove 7 arranged in a corresponding transition, the contact area between the hemispherical surface of the drill bit and the surrounding area of ​​the drill hole is reduced during the drilling process, and the friction force is reduced. In addition, during the drilling process, the powder chips first pass through the front end of the drill bit into the primary powder discharge groove 5, so that the rock chips can be discharged smoothly, avoiding repeated crushing, and then transported backwards into the secondary powder discharge groove 6, and finally into the tertiary powder discharge groove 7. The powder groove structure increases successively, thereby ensuring smooth powder discharge during the drilling process, and greatly extending the service life of the drill bit.

[0034] Furthermore, the ball teeth 8 are cone-shaped and evenly distributed on the end face of the alloy ridge. The ball teeth are evenly distributed on the end face of the alloy ridge, bearing approximately equal rock breaking areas, which can ensure that each tooth is evenly stressed during rock breaking, and avoid premature damage to the side teeth due to uneven stress during rock drilling. The ball teeth 8 are coated with a hard coating. The bottom root of the ball teeth 8 is a columnar structure, and the root is provided with threads, and threaded mounting holes for installing the ball teeth 8 are distributed on the alloy ridge 4. The structure fixed by the threaded connection of the ball teeth makes the ball teeth replaceable, and the ball teeth can be directly replaced separately when they are worn, which is economical and convenient.

[0035] The present application uses the structure of a hemispherical body and a conical transition section to ensure accurate positioning of rock drilling and hole expansion, fast footage speed, standardized holes, and consistent hole size; a structure of a plurality of alloy ridges on the hemispherical surface of the hemispherical body at the front end of the drill bit body forms cutting drill teeth that are convenient for drilling, and each alloy ridge is evenly distributed on the surface of the hemispherical end and bears a roughly equal rock breaking area, which can ensure that each tooth is subjected to uniform force during rock breaking, and avoid premature damage to the side teeth due to uneven force during rock drilling; and the structure of the first-level powder discharge groove 5, the second-level powder discharge groove 6, and the third-level powder discharge groove 7 set in corresponding transitions reduces the contact area between the hemispherical surface of the drill bit and the surrounding area of ​​the borehole during drilling, reduces friction, and the drilling process is smooth. During the drilling process, the powder chips first pass through the front end of the drill bit into the primary powder discharge groove 5, so that the rock debris can be discharged smoothly, avoiding repeated crushing, and then are transported backwards to enter the secondary powder discharge groove 6, and finally enter the tertiary powder discharge groove 7. The powder groove structure increases successively, thereby ensuring smooth powder discharge during the drilling process, greatly extending the service life of the drill bit, and enabling the rock debris to be discharged smoothly, avoiding repeated crushing, and greatly extending the service life of the drill bit; and the structure of the tapered transition section makes it difficult for the hole to deviate, which is conducive to hole forming, thereby ensuring the consistency of the aperture size, and at the same time facilitating smooth powder discharge and avoiding the phenomenon of drill jamming; the overall structural design is reasonable, the installation and use process is simple, and the sampling personnel are convenient and quick to sample, meeting the use requirements.

[0036] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0037] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A pulsator-type rapid-feed drill bit, comprising a drill bit body (1), characterized in that: One end of the drill bit body (1) is provided with a spline section (2) for connecting and fixing with a drill rod, and the other end is provided with a hemisphere (3). A conical transition section is provided between the hemisphere (3) and the spline section. A plurality of alloy ridges (4) are distributed on the hemisphere surface of the hemisphere (3). The alloy ridges (4) are all centered on the top center point of the hemisphere (3) and are distributed in a divergent circle around the hemisphere. Powder discharge grooves are formed between adjacent alloy ridges (4). Ball teeth (8) are distributed on the alloy ridges (4). A high-pressure air hole (9) is provided through the center of the drill bit body (1).

2. The pulsator-type rapid feed drill bit according to claim 1, characterized in that: Both sides of the alloy ridge (4) are inclined surfaces.

3. The pulsator-type rapid feed drill bit according to claim 1, characterized in that: The pulsator-type fast-feed drill bit according to claim 1 is characterized in that the alloy ridge (4) is an arc-shaped structure, and a plurality of alloy ridges (4) are combined to form a spiral convex ridge structure that facilitates drilling.

4. The pulsator-type rapid feed drill bit according to claim 1, characterized in that: The plurality of alloy ridges (4) are evenly arranged in a rotating shape on the circumference of the hemispherical surface of the hemispherical body (3), and their rotating directions are in the same direction.

5. The pulsator-type rapid feed drill bit according to claim 1, characterized in that: The powder discharge grooves include a primary powder discharge groove (5), a secondary powder discharge groove (6) and a tertiary powder discharge groove (7); the primary powder discharge groove (5) is located between the front end regions of adjacent alloy ridges; the secondary powder discharge groove (6) is located at the position where the bracket of the rear region of the adjacent alloy ridges is located and is recessed inwardly to correspond to the primary powder discharge groove (5); and the tertiary powder discharge groove (7) is located at the position of the conical transition section of the hemisphere (3) and is recessed inwardly to correspond to the secondary powder discharge groove (6).

6. The pulsator-type rapid feed drill bit according to claim 1, characterized in that: The ball teeth (8) are of a cone-shaped structure and are evenly distributed on the end surface of the alloy ridge.

7. The pulsator-type rapid feed drill bit according to claim 1, characterized in that: The ball teeth (8) are coated with a hard coating.

8. The pulsator-type rapid-feed drill bit according to claim 1, characterized in that: The bottom root of the ball tooth (8) is a columnar structure and is provided with a thread. The alloy ridge (4) is provided with threaded mounting holes for mounting the ball tooth (8).

9. The pulsator-type rapid feed drill bit according to claim 1, characterized in that: The diameter of the high-pressure air hole (9) is 15-20 mm.

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