Coal mine exploration drill bit

Abstract

The utility model discloses a coal mine exploration drill bit, and particularly relates to the technical field of drill bits, which comprises a drill bit body, three mounting racks are arranged on the outer wall of the drill bit body, a mounting shaft is arranged at the end of each mounting rack, a cone is mounted on each mounting shaft, and a plurality of layers of crushing teeth are arranged on the surface of each cone. The crushing teeth comprise sharp teeth and steel teeth, the sharp teeth and the steel teeth are alternately distributed on the surface of the cone, a threaded rod is fixed to the top of the drill bit body, the multiple layers of crushing teeth are embedded and fixed to the surface of the cone through the cone structure, and each layer of crushing teeth comprises the multiple sharp teeth and the multiple steel teeth which are alternately distributed. In the rotating process of the roller cone, due to the fact that the interval distance between the sharp teeth and the steel teeth is short, the sharp teeth and the steel teeth can rapidly and continuously make contact with soil and break and dig the soil, and compared with a traditional roller cone bit, the roller cone bit is beneficial to improving the efficiency of breaking a soil layer at the same rotating speed.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a coal mine exploration drill bit. Background Art

[0002] A drill bit is a tool with a rotating head end that has cutting ability and is used to drill holes in various materials. A coal mine exploration drill bit is a key tool for breaking rocks and forming wellbores. The coal mine exploration drill bit is installed on a drilling rig and breaks rocks by rotating or impacting.

[0003] Existing coal mine exploration drill bits generally use roller cone bits. The commonly used roller cone bit is a three-cone bit. When the drill pipe of the drilling rig drives the three-cone bit to rotate, the steel teeth embedded on the outer wall of the cone break the soil and drill a hole downward. While drilling, the three-cone bit transports the soil upward to the outside of the hole under the action of rotation to achieve the purpose of continuous downward drilling. However, there are still deficiencies in its actual use. The depth of coal mine exploration is generally dozens to hundreds of meters. When the roller cone bit is drilling and the rotational speed reaches the peak value, the drilling speed is affected by the wear of the steel teeth and cannot be accelerated, so the drilling efficiency cannot be further improved, resulting in slow drilling work. Summary of the Invention

[0004] The purpose of the utility model is to provide a coal mine exploration drill bit to solve the above deficiencies in the technology.

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

[0006] A coal mine exploration drill bit includes a drill bit body. Three mounting brackets are arranged on the outer wall of the drill bit body. An installation shaft is arranged at the end of each mounting bracket. A cone is mounted on the installation shaft. Multiple layers of crushing teeth are arranged on the surface of the cone. The crushing teeth include sharp teeth and steel teeth, and the sharp teeth and steel teeth are alternately distributed on the surface of the cone.

[0007] Preferably, a threaded rod is fixed at the top of the drill bit body. A connecting rod is arranged outside the threaded rod. A threaded hole is opened on the outer wall of the connecting rod, and a threaded groove that is threadedly matched with the outer wall of the threaded rod is opened at the bottom of the connecting rod.

[0008] Preferably, the inside of the drill bit body is a hollow structure. A through hole is opened downward at the top of the threaded rod. A water inlet hole is opened at the top of the connecting rod corresponding to the through hole, and the water inlet hole is communicated with the through hole.

[0009] Preferably, a spray head is arranged at the bottom of the drill bit body. The end of the spray head is inclined and faces the surface of the cone. A protective cover is fixed outside the spray head, and leakage holes are opened on the surface of the protective cover.

[0010] Preferably, a plurality of protruding teeth are fixed on the outer wall of the mounting frame, and the ends of the protruding teeth are sharp.

[0011] Preferably, a drill rod is provided at the bottom of the drill body.

[0012] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0013] Through the setting of the cone structure, multiple layers of crushing teeth are embedded and fixed on the surface of the cone. Each layer of crushing teeth consists of multiple sharp teeth and steel teeth that are alternately distributed. During the rotation of the cone, due to the short distance between the sharp teeth and the steel teeth, the sharp teeth and the steel teeth can quickly and continuously contact the soil and crush and dig the soil. Compared with traditional cone drill bits, at the same rotation speed, it is beneficial to improve the efficiency of crushing the soil layer, thereby increasing the drilling speed and improving the exploration efficiency of coal mine holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a three-dimensional diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the gear of the utility model;

[0018] Figure 4 A three-dimensional diagram of the protective cover of the present invention;

[0019] Figure 5 This is a diagram of the present invention after the connecting rod, gear and protective cover are removed;

[0020] Figure 6 A three-dimensional diagram of the support assembly of the present invention;

[0021] Figure 7 This is a structural diagram of the connecting rod of the utility model.

[0022] Description of reference numerals:

[0023] 1. Connecting rod; 2. Water inlet hole; 3. Threaded hole; 4. Drill bit body; 5. Mounting bracket; 6. Protruding teeth; 7. Protective cover; 8. Gear; 81. Sharp teeth; 82. Steel teeth; 9. Leak hole; 10. Threaded rod; 11. Drill rod; 12. Nozzle; 13. Mounting shaft; 14. Through hole; 15. Threaded groove. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] The utility model provides Figure 1 - Figure 7 The coal mine exploration drill bit shown includes a drill body 4. Three mounting brackets 5 are provided on the outer wall of the drill body 4. A mounting shaft 13 is provided at the end of each mounting bracket 5. A cone 8 is mounted on the mounting shaft 13. The surface of the cone 8 is provided with multiple layers of crushing teeth. The crushing teeth include sharp teeth 81 and steel teeth 82. The sharp teeth 81 and steel teeth 82 are alternately distributed on the surface of the cone 8.

[0026] In this embodiment, specifically, the drill body 4 and the mounting frame 5 are welded and fixed. When the drill body 4 rotates, the mounting frame 5 is driven to rotate, and the mounting frame 5 simultaneously drives the gear 8 to rotate. The gear 8 rotates on the soil layer. Under the action of the sharp teeth 81 and the steel teeth 82 and the pressure, the soil layer is destroyed, and the soil is broken by the force generated by the continuous rotation of the sharp teeth 81 and the steel teeth 82, thereby drilling.

[0027] like Figure 1 - Figure 7 As shown, specifically, a threaded rod 10 is fixed to the top of the drill body 4, a connecting rod 1 is provided on the outside of the threaded rod 10, a threaded hole 3 is provided on the outer wall of the connecting rod 1, and a threaded groove 15 is provided on the bottom of the connecting rod 1 for matching with the thread of the outer wall of the threaded rod 10; in this embodiment, specifically, the connecting rod 1 is screwed together with the threaded rod 10, and the connecting rod 1 is connected to the main shaft of the external drilling rig through bolts, and the threaded hole 3 is used to install the bolts; it should be noted that the main shaft drives the connecting rod 1 to rotate, thereby driving the drill body 4 to rotate. This part is the existing technology and will not be elaborated here.

[0028] like Figure 1 - Figure 7As shown, the interior of the drill bit body 4 is a hollow structure. A through hole 14 is opened downward at the top of the threaded rod 10. An inlet hole 2 is opened at the top of the connecting rod 1 of the through hole 14, and the inlet hole 2 communicates with the through hole 14. A nozzle 12 is provided at the bottom of the drill bit body 4. The end of the nozzle 12 is inclined and faces the surface of the cone 8. A protective cover 7 is fixed to the outside of the nozzle 12, and leakage holes 9 are opened on the surface of the protective cover 7. Specifically, a water pipe is provided on the main shaft of an external drill. The water in the water pipe is conveyed by a water pump and sent into the inlet hole 2, then passes through the through hole 14, and then enters the interior of the drill bit body 4. After water is injected into the interior of the drill bit body 4, under the action of pressure, the water sprays out through the nozzle 12. After passing through the protective cover 7, the water is dispersed outside the cone 8 to cool the cone 8, the sharp teeth 81 and the steel teeth 82, and moisten the soil. The protective cover 7 has the function of protecting the nozzle 12, avoiding the problem that the nozzle 12 is scratched and damaged by stones in the soil layer during the downward drilling of the drill bit.

[0029] As Figure 1 - Figure 7 As shown, a number of convex teeth 6 are fixed to the outer wall of the mounting frame 5, and the ends of the convex teeth 6 are sharp parts. Specifically, the convex teeth 6 are located at the outermost part of the mounting frame 5. During the synchronous rotation of the mounting frame 5 with the drill bit body 4, the convex teeth 6 have the function of loosening the soil layer, facilitating the overall downward drilling of the drill bit, and effectively avoiding the problem of drill bit jamming.

[0030] As Figure 5 As shown, a drill pipe 11 is provided at the bottom of the drill bit body 4. Specifically, when using the drill bit of the present application to explore underground coal mines, the drill bit body 4 rotates and drives the drill pipe 11 to rotate synchronously. The function of the drill pipe 11 is to squeeze and break the stones and hard soil parts in the soil layer downward.

[0031] Only some exemplary embodiments of the present utility model are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. A coal mine exploration drill bit, comprising a drill bit body (4), characterized in that: The outer wall of the drill bit body (4) is provided with three mounting brackets (5), and each end of the mounting bracket (5) is provided with a mounting shaft (13). A roller cone (8) is mounted on the mounting shaft (13). The surface of the roller cone (8) is provided with multiple layers of crushing teeth. The crushing teeth include sharp teeth (81) and steel teeth (82), and the sharp teeth (81) and the steel teeth (82) are alternately distributed on the surface of the roller cone (8).

2. The coal mine exploration drill bit according to claim 1, characterized in that: The top of the drill bit body (4) is fixed with a threaded rod (10). An adjusting rod (1) is arranged outside the threaded rod (10). A threaded hole (3) is formed in the outer wall of the adjusting rod (1), and a threaded groove (15) that is in threaded fit with the outer wall of the threaded rod (10) is formed at the bottom of the adjusting rod (1).

3. A coal mine exploration drill bit according to claim 2, characterized in that: The inside of the drill bit body (4) is of a hollow structure. A through hole (14) is formed downward from the top of the threaded rod (10). An inlet hole (2) is formed at the top of the adjusting rod (1) corresponding to the through hole (14), and the inlet hole (2) communicates with the through hole (14).

4. A coal mine exploration drill bit according to claim 1, characterized in that: A spray head (12) is arranged at the bottom of the drill bit body (4). The end of the spray head (12) is inclined and faces the surface of the roller cone (8). A protective cover (7) is fixed outside the spray head (12), and leakage holes (9) are formed in the surface of the protective cover (7).

5. A coal mine exploration drill bit according to claim 1, characterized in that: A plurality of convex teeth (6) are fixed on the outer wall of the mounting bracket (5), and the ends of the convex teeth (6) are sharp parts.

6. The coal mine exploration drill bit according to claim 1, characterized in that: A drill pipe (11) is arranged at the bottom of the drill bit body (4).

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