Natural diamond table set with core drill

Abstract

The present application relates to the technical field of drill bit, in particular to a natural diamond surface inlay coring drill bit, which comprises a drill bit body; a coring cavity is arranged in the drill bit body; an ejection device is arranged in the coring cavity; the ejection device comprises a spring one and an ejection disc; the ejection disc comprises an upper circular ring and a lower circular ring which are connected in sequence from top to bottom; the upper circular ring is connected with the upper part of the drill bit body through the spring one; the lower circular ring is a cavity in the inside, and a plurality of discharge holes are arranged on the outside; a plurality of through holes are arranged on the side of the drill bit body; in the natural state of the spring one, the bottom of the lower circular ring is close to the bottom of the drill bit body; the side of the drill bit body is further provided with a supporting mechanism for supporting the ejection disc. The ejection device arranged in the drill bit body facilitates the movement of the ejection disc in the coring drill bit, can quickly push out the rock core, and improves the coring efficiency; the design of the lower circular ring and the design of the through holes on the side wall of the drill bit body can discharge the drill body debris, and prevent the plugging phenomenon in the drill bit.

Description

Technical Field

[0001] This invention relates to the field of drill bit technology, and more specifically to a natural diamond surface-mounted core drill bit. Background Technology

[0002] Drill bits are essential tools used in drilling for coalfield geology, underground gas drainage, water injection, and drainage in coal mines. Among them, core drilling bits, also known as hollow drill bits, are mainly used for breaking up rocks and extracting core samples. Current technologies can combine core drilling bits with specialized core-extraction tools, or incorporate push plates within the core drilling bit to eject the rock core. However, in existing technologies, the push plates within the core drilling bit are difficult to operate, hindering the rapid extraction of the rock core and impacting core-extraction efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a natural diamond core drilling bit.

[0004] The technical solution adopted by this invention to solve its technical problem is: A natural diamond surface-mounted core drilling bit includes a drill body; the drill body has a core-taking cavity; an ejection device is installed in the core-taking cavity; the ejection device includes a spring and an ejection plate; the ejection plate includes an upper ring and a lower ring connected sequentially; the upper ring is connected to the upper part of the drill body via the spring; the lower ring has a hollow interior and several discharge holes on its outer surface; several through holes are opened on the side of the drill body; in its natural state, the bottom of the lower ring is close to the bottom of the drill body; a support mechanism for supporting the ejection plate is also provided on the side of the drill body. When the drill bit drills, the rock core presses upward against the ejection plate, the spring enters a compressed state, and the ejection plate is supported by the support mechanism after compression. When core is extracted, the ejection plate disengages from the support mechanism and is pushed downward by the elastic force of the spring, thereby ejecting the core. The above technical solution facilitates the movement of the ejection plate within the core drilling bit, achieving the effect of quickly ejecting the rock core and improving core extraction efficiency. Meanwhile, during the drilling process, some of the debris can enter the cavity inside the lower annulus. As the lower annulus rises, the debris can be discharged from the cavity to the through hole and then discharged from the through hole, preventing blockage inside the drill bit.

[0005] Furthermore, the outer side of the lower ring is in close contact with the inner wall of the core extraction cavity to make the ejector plate more stable.

[0006] Furthermore, the support mechanism includes a rotating body and a telescopic body perpendicular to the central axis of the drill bit body; a receiving cavity is provided on the side wall of the drill bit body, the rotating body is disposed in the receiving cavity and can rotate relative to the receiving cavity, the telescopic body is placed in the rotating body, one end is connected to the inner wall of the rotating body through a second spring, and the other end is integrally connected to a support part; a blind hole matching the support part is opened on the side of the upper ring. When the ejector plate moves upward, it squeezes the support part, and the support part moves in the direction of the second spring. When it moves to the blind hole, the support part enters the blind hole to support and position the ejector plate. When it is necessary to remove the core from the drill bit body, the support part is disengaged from the blind hole to release the ejector plate. Under the action of the first spring, the ejector plate pushes the core out of the core extraction cavity.

[0007] Furthermore, the top surface of the support part matches the top surface of the blind hole, and the bottom surface is an inclined surface. When the ejector plate moves upward, the inclined surface can cause the support part to be squeezed in the direction of the spring. When the support part enters the blind hole, the top surface of the support part matches the top surface of the blind hole, which enables the support part to support the ejector plate.

[0008] Furthermore, the support mechanism is provided in two or more sets, and the number of accommodating cavities opened on the inner wall of the drill bit body is the same as the number of sets of support mechanisms, so that the support mechanism can better support the ejector plate.

[0009] Furthermore, the rotating body is tightly attached to the inner wall of the receiving cavity to prevent the rotating body from rotating on its own.

[0010] Furthermore, in its natural state, the spring is positioned just outside the receiving cavity, allowing for better cooperation between the support and the ejector plate.

[0011] Furthermore, the blind hole is closely fitted to the inner wall of the drill bit body to prevent debris from entering.

[0012] Furthermore, the blind holes and through holes are staggered to prevent debris from entering the blind holes from the through holes.

[0013] Furthermore, two or more sets of spring one and spring two are provided to improve stability.

[0014] Technical effects of the present invention: Compared with the prior art, the natural diamond surface-mounted coring drill bit of the present invention has an ejection device in the drill bit body, which facilitates the movement of the ejection plate in the coring drill bit and can quickly push out the rock core, thus improving the coring efficiency; the design of the lower ring and the through hole design on the side wall of the drill bit body can discharge the debris in the drill body and prevent the blockage phenomenon in the drill bit. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the structural principle of the natural diamond surface-mounted core drill bit of the present invention. Figure 2 For the present invention Figure 1 Enlarged view of the A-section structure; Figure 3 This is a schematic diagram illustrating the principle of the ejector plate structure of the present invention.

[0016] In the diagram, 1. Drill bit body; 2. Core sampling cavity; 3. Spring 1; 4. Ejector plate; 5. Support mechanism; 6. Receiving cavity; 7. Blind hole; 8. Through hole; 41. Upper ring; 42. Lower ring; 43. Cavity; 44. Discharge hole; 51. Rotating body; 52. Telescopic body; 53. Spring 2; 54. Support part. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0018] Example 1: like Figure 1 As shown, this embodiment relates to a natural diamond surface-mount core drill bit, which includes a drill bit body 1; the drill bit body 1 is provided with a core-taking cavity 2; and an ejection device is provided in the core-taking cavity 2.

[0019] like Figure 1 and 2 As shown, the ejection device includes a spring 3 and an ejection plate 4; the ejection plate 4 includes an upper ring 41 and a lower ring 42 connected sequentially; the upper ring 41 is connected to the upper part of the drill body 1 through the spring 3, and the spring 3 is provided in two or more sets; the lower ring 42 has a cavity 43 inside, and its outer side is in close contact with the inner wall of the core extraction cavity 2 and has several discharge holes 44; the drill body 1 has several through holes 8 on its side, and the number of through holes 8 can be set according to actual needs; in the natural state of the spring 3, the bottom of the lower ring 42 is close to the bottom of the drill body 1; the drill body 1 is also provided with a support mechanism 5 for supporting the ejection plate 4.

[0020] like Figure 1 and 2 As shown, the support mechanism 5 includes a rotating body 51 and a telescopic body 52 perpendicular to the central axis of the drill bit body 1; the side wall of the drill bit body 1 is provided with a receiving cavity 6. Preferably, the support mechanism 5 is provided in two or more sets, and the number of receiving cavities 6 opened on the inner wall of the drill bit body 1 is the same as the number of sets of support mechanisms 5, so that the support mechanism 5 can better support the ejector plate 4.

[0021] like Figure 2 As shown, the rotating body 51 is disposed inside the receiving cavity 6 and can rotate relative to the receiving cavity 6. As a preferred embodiment, the rotating body 51 is in close contact with the inner wall of the receiving cavity 6 to prevent the rotating body 51 from rotating on its own.

[0022] like Figure 2 As shown, the telescopic body 52 is placed inside the rotating body 51, with one end connected to the inner wall of the rotating body 51 via a second spring 53, and the other end integrally connected to a support part 54. Two or more sets of the second spring 53 are provided. In its natural state, the support part 54 is located just outside the receiving cavity 6, facilitating better cooperation between the support part 54 and the ejector plate 4. Preferably, a blind hole 7 matching the support part 54 is opened on the side of the upper ring 41. Figure 3 As shown, the blind hole 7 is closely attached to the inner wall of the drill bit body 1 and offset from the through hole 8 to prevent debris from the through hole 8 from entering the blind hole 7. The top surface of the support part 54 matches the top surface of the blind hole 7, and the bottom surface is inclined. When the ejector plate 4 moves upward, the inclined surface can cause the support part 54 to be pressed towards the spring 53. When the support part 54 enters the blind hole 7, the top surface of the support part 54 matches the top surface of the blind hole 7, enabling the support part 54 to support the ejector plate 4. When it is necessary to remove the support part 54 from the blind hole 7, rotate the support part 54 so that the inclined surface faces upward. Under the downward force of the spring 3, the ejector plate 4 presses against the inclined surface of the support part 54, and the support part 54 moves towards the spring 53 until the support part 54 is removed from the blind hole 7. The ejector plate 4 continues to move downward to quickly eject the rock core. In the above technical solution, the support part 54 not only supports the ejector plate 4, but can also be removed from the ejector plate 4 by rotating the support part 54, which has multiple functions and flexible operation.

[0023] Working Principle: During drilling, the core material of the present invention pushes the ejector plate 4 upwards, compressing the spring 3. After compression, the ejector plate 4 is supported by the support mechanism 5. When core is retrieved, the ejector plate 4 disengages from the support mechanism 5 and, under the elastic force of the spring 3, pushes downwards, thereby ejecting the core. Specifically, when the ejector plate 4 moves upwards, it compresses the support part 54, which moves towards the spring 53. When it reaches the blind hole 7, the support part 54 enters the blind hole 7 to support and position the ejector plate 4. When it is necessary to remove the core from the drill bit body 1, the support part 54 disengages from the blind hole 7 to release the ejector plate 4. Under the action of the spring 3, the ejector plate 4 ejects the core from the core retrieval chamber 2. This invention facilitates the movement of the ejector plate 4 within the core retrieval drill bit, achieving rapid core extraction and improving core retrieval efficiency. Meanwhile, during the drilling process, some of the debris can enter the cavity 43 inside the lower ring 42. As the lower ring 42 rises, the debris can be discharged from the cavity 43 to the through hole 8 and discharged through the through hole 8, preventing blockage in the drill bit.

[0024] The present invention can provide an air injection hole (not shown in the figure) on the top or side of the drill bit body 11. The injected gas acts on the rock core and the ejector plate 44, and together with the elastic force of the spring 33, pushes the rock core downward, which can further improve the working efficiency of rock core extraction.

[0025] The above-described specific embodiments are merely specific examples of the present invention. The patent protection scope of the present invention includes, but is not limited to, the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of the present invention should fall within the patent protection scope of the present invention.

Claims

1. A natural diamond surface-mounted core drill bit, comprising a drill bit body (1); wherein the drill bit body (1) is provided with a core-taking cavity (2); characterized in that: An ejection device is provided inside the core-taking cavity (2); the ejection device includes a spring (3) and an ejection plate (4); the ejection plate (4) includes an upper ring (41) and a lower ring (42) connected in sequence; the upper ring (41) is connected to the upper part of the drill body (1) through the spring (3); the lower ring (42) has a cavity (43) inside and several discharge holes (44) on its outer side; several through holes (8) are opened on the side of the drill body (1); in the natural state of the spring (3), the bottom of the lower ring (42) is close to the bottom of the drill body (1); the side of the drill body (1) is also provided with a support mechanism (5) for supporting the ejection plate (4); the support mechanism (5) includes a rotating body (51) and a telescopic body (52) perpendicular to the central axis of the drill body (1); the side wall of the drill body (1) is provided with a receiving cavity (6). The rotating body (51) is set inside the receiving cavity (6) and can rotate relative to the receiving cavity (6). The telescopic body (52) is placed inside the rotating body (51), with one end connected to the inner wall of the rotating body (51) by spring two (53), and the other end integrally connected to the support part (54). The upper ring (41) has a blind hole (7) on its side that matches the support part (54). The top surface of the support part (54) matches the top surface of the blind hole (7), and the bottom surface is a slope. The rotating body (51) is in close contact with the inner wall of the receiving cavity (6). In the natural state of spring two (53), the support part (54) is just located outside the receiving cavity (6). During the drilling process, the debris enters the cavity (43) inside the lower ring (42). During the rise of the lower ring (42), the debris is discharged from the cavity (43) to the through hole (8) and discharged from the through hole (8).

2. The natural diamond surface-mount core drill bit according to claim 1, characterized in that: The outer side of the lower ring (42) is in close contact with the inner wall of the core extraction cavity (2).

3. The natural diamond surface-mount core drill bit according to claim 1, characterized in that: The support mechanism (5) is provided in two or more sets, and the number of receiving cavities (6) opened on the inner wall of the drill bit body (1) is the same as the number of sets of the support mechanism (5).

4. The natural diamond surface-mount core drill bit according to claim 1, characterized in that: The blind hole (7) is closely attached to the inner wall of the drill bit body (1).

5. The natural diamond surface-mount core drill bit according to claim 1, characterized in that: The blind hole (7) and the through hole (8) are staggered.

6. The natural diamond surface-mount core drill bit according to any one of claims 1-5, characterized in that: Two or more sets of each of the springs 1 (3) and 2 (53) are provided.

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