Novel extraction hole drill bit

Abstract

The utility model relates to the field of extraction hole drill bits, and discloses a novel extraction hole drill bit which comprises a drill bit body and a drill rod, a plurality of cutting blocks are fixedly arranged on the edge of the front end of the drill bit body, a plurality of small cylinders are fixedly arranged on the periphery of each cutting block, and a plurality of blades are fixedly arranged at the front end of the drill bit body close to the inside. A water outlet is formed in the center of the front end of the drill bit body in a penetrating mode, a plurality of first holes are formed in the front end of the water outlet, and a plurality of second holes are formed in the periphery of the water outlet. According to the device, coal briquettes in the front can be effectively cleaned through cooperation of the cutting blocks, the blades and the water outlets in the drilling process, accumulation at the front end of the drill bit body is cleaned in time, the drill bit body is cooled, and the service life of the drill bit body is prolonged; and coal powder and hole collapse dust can be attached to the filter plate, and the attachments are simply blown away and cleaned in the rotating direction of the drill rod, so that the gas extraction efficiency is prevented from being influenced by excessive dust.

Description

Technical Field

[0001] The utility model relates to the field of extraction hole drill bits, in particular to a novel extraction hole drill bit. Background Art

[0002] The drill bit is an indispensable tool for drilling operations, and the extraction hole drill bit is even more active in the field of coal mine gas extraction. The extraction hole drill bit often performs deep drilling operations in coal mines. It has the function of gas extraction. There are often solid rocks inside the coal mine, which places high demands on the material requirements of the drill bit and the stability of the drill bit and drill rod. At the same time, drilling operations must pay more attention to efficiency and safety during gas extraction.

[0003] Existing extraction hole drill bits can cope with drilling work in many scenarios, but they cannot guarantee the efficiency of gas extraction well. Most extraction hole drill bits have many hollow parts inside, and the setting of redundant structures affects their own stability. Some extraction hole drill bits collect coal dust first and then process it, which cannot effectively reduce blockage. When the extraction hole drill bits are drilling for a long time, they usually do not have measures to reduce the temperature. Excessive temperature will affect the service life of the drill bit.

[0004] Therefore, those skilled in the art provide a novel extraction hole drill bit to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a new type of extraction hole drill is proposed. The device can use the cooperation of the cutting block, the blade and the water outlet in the drilling hole to effectively clean the coal blocks in the front, and timely clean the accumulation at the front end of the drill bit body and cool the drill bit body to increase its service life. The collapsed holes such as coal powder will adhere to the filter plate and the attachments can be simply blown off and cleaned by the rotation direction of the drill rod to prevent excessive dust from affecting the gas extraction efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel extraction hole drill bit, comprising a drill bit body and a drill rod, a plurality of cutting blocks are fixedly arranged at the front edge of the drill bit body, a plurality of small cylinders are fixedly arranged around the cutting blocks, a plurality of blades are fixedly arranged inside the front end of the drill bit body, a water outlet is penetrated at the center of the front end of the drill bit body, a plurality of No. 1 holes are opened at the front end of the water outlet, a plurality of No. 2 holes are opened around the water outlet, bolts are threadedly penetrated at the rear of both sides of the drill bit body, thread grooves are opened at the front of both sides of the drill rod, a high-pressure water channel is penetrated at the center of the front and rear ends of the drill rod, a gas extraction pipeline is penetrated at the center of the rear end of the drill rod, a plurality of outer filter plates are fixedly arranged around the drill rod near the thread grooves, inner filter plates are fixedly arranged around the drill rod directly below the outer filter plates, and a booster pump is fixedly arranged around the drill rod near the outer filter plates;

[0007] Through the above technical solution, the densely distributed small cylinders on the cutting block can effectively improve the drilling efficiency of the cutting block, and at the same time provide the cutting block with protection from high-speed cutting of surrounding objects, thereby increasing the service life of the cutting block. The high-pressure water channel transports water to the booster pump for further pressurization. When water is sprayed out from the water outlet, the No. 2 hole acts on the front plane of the drill bit body at high speed to effectively remove deposits. The water is sprayed out at high speed through the No. 1 hole to impact and split the blocks that the blade cannot cut well after the drilling of the drill bit body, thereby reducing its impact on the drill bit body. At the same time, the drill bit surface can be cooled by water to improve The service life of the drill bit, the outer filter plate will rotate with the drill pipe to more effectively absorb the dust and collapsed holes after drilling to prevent them from interfering with gas extraction. The arrangement of the three filter plates of the outer filter plate allows the filter plates on both sides to be simply blown away and cleaned by the rotation after the drill pipe changes its rotation direction. The inner filter plate further prevents dust from entering, reduces the impact of dust and filter plate blockage on gas extraction, and makes gas extraction more efficient. After the front end of the drill pipe is threadedly connected to the rear side of the inside of the drill bit body, it is further fixed and tightened by two bolts, making the connection between the drill bit body and the drill pipe more stable and reducing the connection gap.

[0008] Furthermore, a plurality of the small cylinders are fixedly arranged at the side edges of the cut block;

[0009] Through the above technical solution, the small cylinder can reduce the friction damage caused by the edge of the cut block during drilling, and can also further improve the drilling efficiency.

[0010] Furthermore, the front end of the drill rod near the thread groove area can be threadedly connected to the rear side of the drill bit body;

[0011] Through the above technical solution, the connection gap can be minimized through threaded connection, reducing dust clogging caused by drilling.

[0012] Furthermore, when the two bolts are completely threaded and arranged at the rear of both sides of the drill body, the inner ends of the two bolts will be located in the middle of the thread groove;

[0013] Through the above technical solution, the drill rod is further fixed and compressed, so that the drill rod is more stable and not easy to fall off when rotating with the drill bit body.

[0014] Furthermore, the plurality of outer filter plates are each composed of three filter plates, and the plurality of outer filter plates can rotate along with the rotation of the drill pipe without falling off;

[0015] Through the above technical solution, after the drill pipe changes its rotation direction, the filter plates on both sides can simply clean the dust on them by turning in different directions to prevent excessive dust accumulation from affecting the gas extraction efficiency. The adverse effects caused by hole collapse can also be further prevented by rotation.

[0016] Furthermore, the radius of the gas extraction pipeline is greater than the radius of the high-pressure water channel, and the front end of the gas extraction pipeline and the front end of the inner filter plate are in the same horizontal plane;

[0017] Through the above technical solution, the gas extraction of the gas extraction pipeline and the water output of the high-pressure water channel do not interfere with each other.

[0018] Furthermore, the drill bit body is made of cemented carbide material, and the maximum radius of the drill bit body is greater than the maximum radius of the drill rod;

[0019] Through the above technical solution, the drill bit body is made of cemented carbide material and is more stable and not easily damaged when facing hard objects encountered during drilling. The maximum radius of the drill bit body is greater than the maximum radius of the drill rod, which can reduce the adverse effects of coal blocks and other objects caused by drilling on the gas extraction pipeline.

[0020] Furthermore, the internal arrangement of the booster pump does not affect the extraction work of the gas extraction pipeline, and the booster pump can further increase the high-speed ejection of the internal water at the water outlet;

[0021] Through the above technical solution, the water is further pressurized and can cooperate with the drill bit body to better perform the drilling work during the drilling process, better clean the accumulation on the front end surface of the drill bit body, better impact and split the blocks in front, better cool the drill bit body, and improve the service life.

[0022] The utility model has the following beneficial effects:

[0023] 1. The utility model proposes a new type of extraction hole drill bit, which uses a booster pump to pressurize water so that it can be sprayed out from hole No. 1 and hole No. 2 at high speed. The water sprayed from hole No. 1 will further wash away the blockage in the front and break up the lumps. The water sprayed from hole No. 2 can clean up the accumulation at the front end of the drill bit body in time, and cool the drill bit body to increase its service life.

[0024] 2. The utility model proposes a new type of extraction hole drill bit, which sets the gas extraction pipeline on the drill rod, and cooperates with the outer filter plate and the inner filter plate. When the drill rod rotates, the dust such as coal powder attached to the outer filter plate on the side opposite to the rotation direction will be blown away and cleaned, preventing the filter plate from being attached with too much dust and unable to be cleaned in time, which will seriously affect the gas extraction. The double-layer protection of the inner and outer filter plates further improves the gas extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front axonometric schematic diagram of the utility model;

[0026] Figure 2 It is a rear axonometric schematic diagram of the utility model;

[0027] Figure 3 It is a front cross-sectional schematic diagram of the utility model near the outer filter plate area;

[0028] Figure 4 It is a front view schematic diagram of the main part of the drill bit of the utility model;

[0029] Figure 5 It is a cross-sectional schematic diagram of the threaded connection between the drill bit body and the drill rod of the utility model;

[0030] Figure 6 It is a front axonometric schematic diagram of the water outlet of the utility model.

[0031] Legend:

[0032] 1. Drill bit body; 2. Blade; 3. Water outlet; 4. Cutting block; 5. Small cylinder; 6. Bolt; 7. High-pressure water channel; 8. Threaded groove; 9. Outer filter plate; 10. Booster pump; 11. Drill rod; 12. Gas extraction pipeline; 13. No. 1 hole; 14. No. 2 hole; 15. Inner filter plate. DETAILED DESCRIPTION

[0033] 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 in 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.

[0034] Reference Figure 1-6, the utility model provides an embodiment: a new type of extraction hole drill bit, including a drill bit body 1 and a drill rod 11. The drill bit body 1 should be efficient and ensure that the drilled hole is not easy to collapse during drilling operations. A plurality of cutting blocks 4 are fixedly arranged at the edge of the front end of the drill bit body 1. The cutting block 4 is easily worn during long-term operation. In order to increase its service life, a plurality of small cylinders 5 are fixedly arranged around the cutting block 4. A plurality of blades 2 are fixedly arranged inside the front end of the drill bit body 1. The plurality of blades 2 can further chop up the blocks that the cutting block 4 cannot handle well. A water outlet 3 is provided through the center of the front end of the drill bit body 1. A plurality of No. 1 holes 13 are provided at the front end of the water outlet 3. The water sprayed from the No. 1 hole 13 is mainly used to cooperate with the cutting block 4 to eliminate the front obstruction. A plurality of No. 2 holes 14 are provided around the water outlet 3. The water sprayed from the No. 2 holes 14 is mainly used to clean up the accumulation at the front end of the drill bit body 1 and clean the drill bit body 1 is used to cool down and increase its service life. Bolts 6 are threadedly provided at the rear of both sides of the drill body 1 to further stabilize the connection between the drill body 1 and the drill rod 11. Thread grooves 8 are provided at the front of both sides of the drill rod 11. A high-pressure water channel 7 is provided at the center of the front and rear ends of the drill rod 11. A water pump is connected to the rear end of the high-pressure water channel 7. A gas extraction pipeline 12 is provided at the center of the rear end of the drill rod 11. The rear end of the gas extraction pipeline 12 is connected to a gas extraction device and a related gas concentration detection device. The gas extraction pipeline 12 is provided from the rear end to the front end of the outer filter plate 9. A plurality of outer filter plates 9 are fixedly provided near the thread grooves 8 around the drill rod 11. Inner filter plates 15 are fixedly provided at the parts of the drill rod 11 directly below the outer filter plates 9 to further filter dust and coal powder. A booster pump 10 is fixedly provided near the outer filter plates 9 around the drill rod 11 so that water can be sprayed out at a higher speed at the drill body 1.

[0035] The densely distributed small cylinders 5 on the cutting block 4 can effectively improve the drilling efficiency of the cutting block 4, and at the same time protect the cutting block 4 from high-speed cutting of surrounding objects, thereby increasing the service life of the cutting block 4. The high-pressure water channel 7 transports water to the booster pump 10 for further pressurization. When the water is sprayed out from the water outlet 3, the No. 2 hole 14 applies water at high speed to the front end plane of the drill bit body 1, effectively removing the deposits. The water is sprayed out at high speed through the No. 1 hole 13 to impact and split the blocks that the blade 2 cannot cut well after the drilling of the drill bit body 1, thereby reducing its impact on the drill bit body 1. At the same time, the drill bit surface can be cooled by water to improve the drill bit. The service life of the outer filter plate 9 is longer. The outer filter plate 9 rotates with the drill rod 11 to more effectively absorb the dust and collapsed holes after drilling to prevent them from interfering with the gas extraction. The three filter plates of the outer filter plate 9 can be set so that after the drill rod 11 changes its rotation direction, the filter plates on both sides will be subjected to the rotation effect to simply blow away the dust on them. The inner filter plate 15 further prevents dust from entering, reduces the impact of dust and filter plate blockage on gas extraction, and makes gas extraction more efficient. After the front end of the drill rod 11 is threadedly connected to the rear side of the drill bit body 1, it is further fixed and pressed by two bolts 6, so that the connection between the drill bit body 1 and the drill rod 11 is more stable, and the connection gap is reduced;

[0036] The plurality of small cylinders 5 are fixedly arranged on the side of the cut block 4, especially on the side edge of the cut block 4. The small cylinders 5 can reduce the friction damage caused by the edge of the cut block 4 during drilling, and can also further improve the drilling efficiency. The front end of the drill rod 11 can be threadedly connected to the rear side of the drill bit body 1 near the thread groove 8. The threaded connection can minimize the connection gap and reduce the dust clogging caused by drilling. When the two bolts 6 are completely threaded and arranged at the rear of both sides of the drill bit body 1, the inner ends of the two bolts 6 will be in the middle of the thread groove 8, further fixing and pressing the drill rod 11, so that the drill rod 11 is more stable and not easy to fall off when rotating with the drill bit body 1. The plurality of outer filter plates 9 are composed of three filter plates. The plurality of outer filter plates 9 can rotate with the drill rod 11 and will not fall off. After the drill rod 11 changes its rotation direction, the filter plates on both sides can be simply cleaned by different directions to prevent excessive dust accumulation from affecting the gas extraction efficiency. The adverse effects caused by hole collapse can also be further prevented by rotation.

[0037] The radius of the gas extraction pipeline 12 is greater than the radius of the high-pressure water channel 7, and the front end of the gas extraction pipeline 12 is at the same horizontal plane as the front end of the inner filter plate 15. The gas extraction of the gas extraction pipeline 12 and the water output of the high-pressure water channel 7 do not interfere with each other. The drill bit body 1 is made of hard alloy material, and the maximum radius of the drill bit body 1 is greater than the maximum radius of the drill rod 11. The drill bit body 1 is made of hard alloy material and is more stable and not easy to be damaged when facing hard objects encountered in drilling. The maximum radius of the drill bit body 1 is greater than the maximum radius of the drill rod 11, which can reduce the adverse effects of coal blocks and other objects caused by drilling on the gas extraction pipeline 12. The internal setting of the booster pump 10 does not affect the extraction work of the gas extraction pipeline 12. The booster pump 10 can further increase the high-speed ejection of the internal water at the water outlet 3. The water is further pressurized, and can cooperate with the drill bit body 1 to better perform the drilling work during the drilling process, better clean the accumulation on the front surface of the drill bit body 1, better impact and split the front block, better cool the drill bit body 1, and improve the service life.

[0038] Working principle: After the rear end of the drill bit body 1 is threadedly connected to the front end of the drill rod 11, the bolt 6 is screwed into the thread groove 8 for further fixing and tightening. When drilling, the block 4 and the blade 2 cooperate to perform drilling work, and the large and small coal blocks are chopped respectively. The water is further pressurized when it flows through the booster pump 10 through the high-pressure water channel 7. When it flows through the No. 1 hole 13, the lumps that cannot be chopped well in front can be further impacted and chopped. When it flows through the No. 2 hole 14, the accumulation at the front end of the drill bit body 1 can be washed away in time and the drill bit body 1 can be cooled. During the drilling process, coal powder and dust will adhere to the outer filter plate 9. When the outer filter plate 9 rotates to one side with the drill rod 11, the dust on the filter plate on the other side of the outer filter plate 9 can be cleaned by the wind caused by the rotation. An inner filter plate 15 is provided inside to further ensure the gas extraction efficiency.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can 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 should be included in the protection scope of the present invention.

Claims

1. A novel extraction hole drill bit, comprising a drill bit body (1) and a drill rod (11), characterized in that: A plurality of cutting blocks (4) are fixedly arranged at the front edge of the drill bit body (1), and a plurality of small cylinders (5) are fixedly arranged around the cutting blocks (4). A plurality of blades (2) are fixedly arranged inside the front end of the drill bit body (1). A water outlet (3) is provided through the center of the front end of the drill bit body (1), and a plurality of No. 1 holes (13) are provided at the front end of the water outlet (3). A plurality of No. 2 holes (14) are provided around the water outlet (3). Bolts (6) are threadedly provided through the rear of both sides of the drill bit body (1). A thread groove (8) is provided at the front of both sides of the drill rod (11); a high-pressure water channel (7) is provided through the center of the front and rear ends of the drill rod (11); a gas extraction pipeline (12) is provided through the center of the rear end of the drill rod (11); a plurality of outer filter plates (9) are fixedly provided around the drill rod (11) near the thread groove (8); inner filter plates (15) are fixedly provided around the drill rod (11) directly below the outer filter plates (9); and a booster pump (10) is fixedly provided around the drill rod (11) near the outer filter plates (9).

2. A new type of extraction hole drill bit according to claim 1, characterized in that: The plurality of small cylinders (5) are fixedly arranged at the side edges of the cut block (4).

3. A new type of extraction hole drill bit according to claim 1, characterized in that: The front end of the drill rod (11) near the thread groove (8) can be threadedly connected to the rear side of the inside of the drill bit body (1).

4. A new type of extraction hole drill bit according to claim 1, characterized in that: When the two bolts (6) are threadedly disposed at the rear of both sides of the drill bit body (1), the inner ends of the two bolts (6) will be located in the middle of the thread groove (8).

5. The novel extraction hole drill bit according to claim 1 is characterized in that: The plurality of outer filter plates (9) are each composed of three filter plates, and the plurality of outer filter plates (9) can rotate along with the drill rod (11) without falling off.

6. A new type of extraction hole drill bit according to claim 1, characterized in that: The radius of the gas extraction pipeline (12) is greater than the radius of the high-pressure water channel (7), and the front end of the gas extraction pipeline (12) and the front end of the inner filter plate (15) are located at the same horizontal plane.

7. The novel extraction hole drill bit according to claim 1 is characterized in that: The drill bit body (1) is made of hard alloy material, and the maximum radius of the drill bit body (1) is greater than the maximum radius of the drill rod (11).

8. The novel extraction hole drill bit according to claim 1 is characterized in that: The internal arrangement of the booster pump (10) does not affect the extraction work of the gas extraction pipeline (12), and the booster pump (10) can further increase the high-speed ejection of the internal water at the water outlet (3).

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