A blowout preventer drill bit for coal seam drilling.

Abstract

The invention discloses a blowout prevention drill bit for coal seam drilling construction, the invention relates to the field of mining engineering technology, comprises a drill bit and a blowout prevention mechanism, a coal cinder interception mechanism is arranged on the left side of the drill bit, a water pressure regulating mechanism is arranged on the right side of the blowout prevention mechanism, and a monitoring mechanism is arranged on the outer wall of the drill bit. The invention has the advantages that: when the drill bit is normally constructed, the first fan-shaped water outlet hole of the valve seat and the second fan-shaped water outlet hole of the valve core are staggered at 90 degrees with each other, the valve core overcomes the elastic force of the spring and is pushed open under the action of the high-pressure water in the drill rod, the high-pressure water flows along the valve core and the joint body through the drill bit water outlet and sprays out of the hole, when the hole cannot be constructed normally due to the gas pressure or the high water pressure of the collapsed hole, after the pressure is relieved, the gas, high-pressure water and coal cinder in the borehole will return to the drill bit again along the drill bit water outlet, the first fan-shaped water outlet hole of the valve seat and the second fan-shaped water outlet hole of the valve core are closed, and the high-pressure coal cinder in the borehole is effectively prevented from flowing back into the drill bit and the drill rod.

Description

Technical Field

[0001] The invention relates to the technical field of mining engineering, in particular to a blowout prevention drill bit used in coal seam drilling construction. Background Art

[0002] Gas outburst often occurs in the process of coal mining, and is often called "coal and gas outburst". Gas outburst is a special term for disasters. It refers to a geological disaster caused by the increase in coal mining depth and gas content. Under the action of ground stress and the gravitational force of gas release, the weak coal seam breaks through the resistance line and releases a large amount of gas and coal in an instant, which seriously threatens the safe production of coal mines. Coal seam drill bit is a drill bit used for drilling operations in coal seams.

[0003] In the prior art, during the drilling construction of high-gas outburst coal seams, due to the release of coal seam gas stress around the bottom of the hole, a large amount of gas carrying coal slag and water is ejected in the opposite direction along the drill rod through the drill bit drainage hole, which can easily cause drill rod blockage and injury accidents. For this reason, we propose a blowout-proof drill bit for coal seam drilling construction. Summary of the invention

[0004] The purpose of the present invention is to provide a blowout prevention drill bit for coal seam drilling construction.

[0005] In order to solve the problems raised in the above-mentioned background technology, the present invention provides the following technical solutions: a blowout prevention drill bit for coal seam drilling construction, comprising a drill bit and a blowout prevention mechanism, a coal cinder interception mechanism is arranged on the left side of the drill bit, a water pressure regulating mechanism is arranged on the right side of the blowout prevention mechanism, a monitoring mechanism is arranged on the outer wall of the drill bit, the blowout prevention mechanism comprises a connecting rod, the connecting rod is fixedly connected to a valve seat through a first retaining spring, a first fan-shaped water outlet hole is opened inside the valve seat, the valve seat is movably connected to a spring through a valve core, a second fan-shaped water outlet hole is opened inside the valve core, the spring is movably connected to a second retaining spring through a joint body, the coal cinder interception mechanism comprises a mounting part, an impact head is fixedly installed on the upper surface of the mounting part, the mounting part is movably connected to a threaded part through a threaded groove, and the threaded part is fixedly connected to a coal cinder interception grid through a water pipe.

[0006] As a further solution of the present invention: six groups of first grooves are opened on the outer wall of the drill bit, and the six groups of first grooves are distributed in a circular array along the outer wall of the drill bit. A water outlet is opened on the left side of the drill bit near the middle position, and a second groove is opened on the outside of the water outlet.

[0007] As a further solution of the present invention: the left end of the connecting rod is fixedly mounted on the right end of the drill bit, the first retaining spring is fixedly mounted on the inner wall of the connecting rod near the right end, the valve seat is fixedly mounted on the left end of the first retaining spring, and a sealing member is fixedly mounted on the outer wall of the valve seat, and the outer wall of the sealing member abuts against the inner wall of the connecting rod.

[0008] As a further solution of the present invention: the second retaining spring is fixedly installed in the inner wall of the drill bit, the left end of the joint body is fixedly installed on the right end of the second retaining spring, the left end of the spring is fixedly installed on the right end of the joint body, the left end of the spring is fixedly connected to the left end of the valve core, the valve core is slidably connected to the inside of the drill bit, the right end of the valve core and the left end of the valve seat are abutted against each other, and the first fan-shaped water outlet hole and the second fan-shaped water outlet hole are staggered at ninety degrees.

[0009] As a further solution of the present invention: the impact heads are distributed in a circular array along the surface of the mounting piece, the lower end of the mounting piece is fixedly mounted inside the second groove, and the thread groove is opened on the inner wall of the mounting piece.

[0010] As a further solution of the present invention: the threaded member is fixedly mounted on the outer wall of the water pipe, the threaded member and the thread groove are threadedly connected, and the cinder intercepting grid is fixedly mounted on the inner wall of the water pipe near the upper end.

[0011] As a further solution of the present invention: the water pressure regulating mechanism includes a first connecting pipe, the left end of the first connecting pipe is fixedly installed on the right end of the connecting rod, the inner wall of the right end of the first connecting pipe is provided with a first slot, the interior of the first slot is plugged with a first plug-in tube, and the right end of the first plug-in tube is fixedly installed with a water pressure regulating valve.

[0012] As a further solution of the present invention: a second plug-in tube is fixedly installed on the right end of the water pressure regulating valve, and the second plug-in tube is movably connected to a second connecting pipe through a second slot.

[0013] As a further solution of the present invention: the monitoring mechanism includes a pressure sensor, a temperature sensor, a vibration sensor, a rotation speed sensor, a displacement sensor and a gas concentration sensor, and the pressure sensor, temperature sensor, vibration sensor, rotation speed sensor, displacement sensor and gas concentration sensor are respectively fixedly installed inside the six groups of first grooves.

[0014] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The blowout prevention mechanism of the present invention is set. When the drill bit is working normally, high-pressure water enters the two symmetrical first fan-shaped water outlet holes of the valve seat in the drill bit through the drill rod. Since the first fan-shaped water outlet hole of the valve seat and the second fan-shaped water outlet hole of the valve core are staggered at 90 degrees, the valve core is pushed open by the high-pressure water in the drill rod to overcome the elastic force of the spring, and the high-pressure water flows through the drill bit outlet and sprays out of the hole along the valve core and the joint body. When the hole cannot be normally constructed due to gas pressure or high water pressure of the collapsed hole, the operator outside the hole can relieve the water pressure inside the drill rod. After the pressure is released, the gas, high-pressure water and coal slag in the borehole will return to the drill bit through the drill bit outlet. At this time, the valve core has been tightly combined with the valve seat under the action of the spring when the drill rod is unloaded. The first fan-shaped water outlet hole of the valve seat and the second fan-shaped water outlet hole of the valve core are closed. The high-pressure water and coal slag outside the drill bit cannot enter the drill bit and drill rod, effectively preventing the high-pressure coal slag in the borehole from flowing back into the drill bit and drill rod, avoiding the gas, high-pressure water and coal slag in the hole from flowing back into the drill bit and drill rod during the drilling construction process, and preventing the occurrence of drill rod blockage and injury accidents;

[0016] 2. The present invention, through the provided coal cinder interception mechanism, can intercept the coal cinders flowing back into the drill bit and the drill rod directly on the outside of the drill bit through the coal cinder interception grid, so as to prevent the coal cinders from entering the water outlet and causing the water outlet to be blocked. At the same time, the design of the threaded member and the threaded groove facilitates the cleaning and replacement of the coal cinder interception grid in the later stage, and can further crush the coal seam near the water outlet through the impact head, so as to prevent the large coal cinders near the water outlet from blocking the water outlet and reducing the flow rate of the high-pressure water;

[0017] 3. The water pressure regulating mechanism provided in the present invention can connect the water pressure regulating valve and the drill bit through the first connecting pipe, and connect the water pressure regulating valve and the drill rod through the second connecting pipe. The water pressure can be flexibly adjusted according to the actual drilling needs to achieve the best drilling effect. The water pressure can be reduced in softer coal seams and appropriately increased in harder coal seams, thereby avoiding energy waste caused by unnecessary high water pressure and preventing damage to the drill bit and related equipment caused by excessive water pressure, so that the drill bit can better adapt to the complex and changeable underground environment.

[0018] 4. The present invention can monitor the working status of the drill bit and the coal quality outside the drill bit in real time through the monitoring mechanism, and feed the data back to the control system so as to adjust the drilling parameters or issue early warnings in time, thereby effectively reducing the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the whole embodiment of the present invention;

[0020] Figure 2 It is an overall rear view of the embodiment of the present invention;

[0021] Figure 3 An exploded view of a part of the structure in an embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of some structures in an embodiment of the present invention;

[0023] Figure 5 An exploded view of a portion of the blowout prevention mechanism in an embodiment of the present invention;

[0024] Figure 6 It is a cross-sectional view of a part of the structure in an embodiment of the present invention;

[0025] Figure 7 It is a partial structural cross-sectional view of the blowout prevention mechanism in an embodiment of the present invention;

[0026] Figure 8 An exploded view of a coal slag interception mechanism in an embodiment of the present invention;

[0027] Fig. 9 1 is an exploded view of the water pressure regulating mechanism in an embodiment of the present invention.

[0028] In the figure: 1, drill bit; 2, first groove; 3, water outlet; 4, second groove; 5, blowout prevention mechanism; 501, connecting rod; 502, first retaining spring; 503, valve seat; 504, first fan-shaped water outlet hole; 505, valve core; 506, second fan-shaped water outlet hole; 507, spring; 508, joint body; 509, second retaining spring; 510, sealing member; 6, coal slag interception mechanism; 61, mounting member; 62, impact head; 63, threaded groove; 64 , water pipe; 65, threaded parts; 66, coal cinder interception grille; 7, water pressure regulating mechanism; 71, first connecting pipe; 72, first slot; 73, first plug-in tube; 74, water pressure regulating valve; 75, second plug-in tube; 76, second connecting pipe; 77, second slot; 8, monitoring mechanism; 81, pressure sensor; 82, temperature sensor; 83, vibration sensor; 84, speed sensor; 85, displacement sensor; 86, gas concentration sensor. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0030] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Please see attached Figure 1 -Attached Fig. 9The present invention discloses a blowout prevention drill bit for coal seam drilling construction, comprising a drill bit 1 and a blowout prevention mechanism 5, a cinder interception mechanism 6 is arranged on the left side of the drill bit 1, a water pressure regulating mechanism 7 is arranged on the right side of the blowout prevention mechanism 5, a monitoring mechanism 8 is arranged on the outer wall of the drill bit 1, the blowout prevention mechanism 5 comprises a connecting rod 501, the connecting rod 501 is fixedly connected to a valve seat 503 through a first retaining spring 502, a first fan-shaped water outlet hole 504 is provided inside the valve seat 503, the valve seat 503 is movably connected to a spring 507 through a valve core 505, a second fan-shaped water outlet hole 506 is provided inside the valve core 505, the spring 507 is movably connected to a second retaining spring 509 through a joint body 508, the cinder interception mechanism 6 comprises a mounting member 61, an impact head 62 is fixedly installed on the upper surface of the mounting member 61, the mounting member 61 is movably connected to a threaded member 65 through a threaded groove 63, and the threaded member 65 is fixedly connected to a cinder interception grid 66 through a water pipe 64.

[0032] In one embodiment of the present invention: six groups of first grooves 2 are opened on the outer wall of the drill bit 1, and the six groups of first grooves 2 are distributed in a circular array along the outer wall of the drill bit 1. A water outlet 3 is opened near the middle position on the left side of the drill bit 1, and a second groove 4 is opened on the outer side of the water outlet 3.

[0033] In one embodiment of the present invention: the left end of the connecting rod 501 is fixedly mounted on the right end of the drill bit 1, the first retaining spring 502 is fixedly mounted on the inner wall of the connecting rod 501 near the right end, the valve seat 503 is fixedly mounted on the left end of the first retaining spring 502, and a sealing member 510 is fixedly mounted on the outer wall of the valve seat 503, and the outer wall of the sealing member 510 is against the inner wall of the connecting rod 501.

[0034] In one embodiment of the present invention: the second retaining spring 509 is fixedly installed in the inner wall of the drill bit 1, the left end of the joint body 508 is fixedly installed on the right end of the second retaining spring 509, the left end of the spring 507 is fixedly installed on the right end of the joint body 508, the left end of the spring 507 is fixedly connected to the left end of the valve core 505, the valve core 505 is slidably connected to the inside of the drill bit 1, the right end of the valve core 505 and the left end of the valve seat 503 are abutted, and the first fan-shaped water outlet hole 504 and the second fan-shaped water outlet hole 506 are staggered at ninety degrees.

[0035] In one embodiment of the present invention, the impact heads 62 are distributed in a circular array along the surface of the mounting member 61 , the lower end of the mounting member 61 is fixedly mounted inside the second groove 4 , and the threaded groove 63 is opened on the inner wall of the mounting member 61 .

[0036] In one embodiment of the present invention: the threaded member 65 is fixedly mounted on the outer wall of the water pipe 64 , the threaded member 65 is threadedly connected to the thread groove 63 , and the cinder intercepting grid 66 is fixedly mounted on the inner wall of the water pipe 64 near the upper end.

[0037] In one embodiment of the present invention: the water pressure regulating mechanism 7 includes a first connecting pipe 71, the left end of the first connecting pipe 71 is fixedly installed on the right end of the connecting rod 501, a first slot 72 is opened on the inner wall of the right end of the first connecting pipe 71, a first plug-in tube 73 is inserted into the inside of the first slot 72, and a water pressure regulating valve 74 is fixedly installed on the right end of the first plug-in tube 73.

[0038] In one embodiment of the present invention: a second plug-in tube 75 is fixedly installed on the right end of the water pressure regulating valve 74 , and the second plug-in tube 75 is movably connected to a second connecting pipe 76 via a second slot 77 .

[0039] In one embodiment of the present invention: the monitoring mechanism 8 includes a pressure sensor 81, a temperature sensor 82, a vibration sensor 83, a rotation speed sensor 84, a displacement sensor 85 and a gas concentration sensor 86, and the pressure sensor 81, the temperature sensor 82, the vibration sensor 83, the rotation speed sensor 84, the displacement sensor 85 and the gas concentration sensor 86 are respectively fixedly installed inside the six groups of first grooves 2.

[0040] Example 1, please refer to the attached Figure 1 -Attached Figure 7 The two symmetrical first fan-shaped water outlet holes 504 of the valve seat 503 and the two symmetrical second fan-shaped water outlet holes 506 of the valve core 505 are staggered at 90 degrees. Under the action of high-pressure water in the drill pipe, the valve core 505 overcomes the elastic force of the spring 507 and is pushed open, and the valve core 505 and the valve seat 503 are separated, so that water flows out from the first fan-shaped water outlet hole 504 of the valve seat 503, and then flows from the second fan-shaped water outlet hole 506 of the valve core 505 through the joint body 508 and is sprayed out from the water outlet 3. When the coal slag, gas and high-pressure water in the drill hole flow back, the valve core 505 is offset from the valve seat 503 under the action of the spring 507, and the first fan-shaped water outlet hole 504 and the second fan-shaped water outlet hole 506 are blocked, thereby preventing the coal slag, gas and high pressure from entering the drill pipe and spraying back.

[0041] Example 2, please refer to the attached Figure 1 -Attached Figure 8 The coal slag intercepting grille 66 is fixedly installed inside the water pipe 64, and the water pipe 64 is threadedly connected to the threaded groove 63 of the mounting member 61 through the threaded member 65, so that the coal slag intercepting grille 66 can be easily installed and disassembled. The impact head 62 can further crush the coal seam near the water outlet 3 to prevent larger coal slag from damaging the water outlet 3.

[0042] Example 3, please refer to the attached Figure 1 -Attached Figure 2The pressure sensor 81 is used to monitor the pressure on the drill bit 1, understand the resistance changes during the drilling process, and evaluate the hardness of the coal seam. The temperature sensor 82 is used to monitor the temperature of the drill bit 1 during operation to prevent damage or failure caused by excessive temperature. The vibration sensor 83 is used to sense the vibration of the drill bit 1, and can promptly detect abnormal vibrations to indicate possible failures or unstable states. The speed sensor 84 is used to monitor the rotation speed of the drill bit 1 to ensure a suitable drilling speed. The displacement sensor 85 is used to understand the drilling depth and position of the drill bit 1. The gas concentration sensor 86 is used to monitor the gas content to ensure operation safety.

[0043] Specifically, through the anti-blowout mechanism 5, when the drill bit 1 is working normally, high-pressure water enters the two symmetrical first fan-shaped water outlet holes 504 of the valve seat 503 in the drill bit 1 through the drill rod. Since the first fan-shaped water outlet holes 504 of the valve seat 503 and the second fan-shaped water outlet holes 506 of the valve core 505 are staggered at 90 degrees, the valve core 505 overcomes the elastic force of the spring 507 and is pushed open under the action of the high-pressure water in the drill rod, and the high-pressure water flows through the water outlet 3 of the drill bit 1 and sprays out of the hole along the valve core 505 and the joint body 508. When the hole is high due to gas pressure or water pressure collapse, the water in the hole is high. When normal construction is impossible, after the operator outside the hole relieves the water pressure inside the drill pipe, the gas, high-pressure water and coal slag in the borehole will return to the drill bit 1 again through the water outlet 3 of the drill bit 1. At this time, the valve core 505 has been tightly combined with the valve seat 503 under the action of the spring 507 when the drill pipe is depressurized. The first fan-shaped water outlet hole 504 of the valve seat 503 and the second fan-shaped water outlet hole 506 of the valve core 505 are closed. The high-pressure water and coal slag outside the drill bit 1 cannot enter the drill bit 1 and the drill pipe, effectively preventing the high-pressure coal slag in the borehole from flowing back into the drill bit 1 and the drill pipe.

[0044] Specifically, by setting up the coal cinder interception mechanism 6, the coal cinder that flows back into the drill bit 1 and the drill rod can be directly intercepted on the outside of the drill bit 1 through the coal cinder interception grid 66, preventing the coal cinder from entering the water outlet 3 and causing the water outlet 3 to be blocked, while facilitating later cleaning and replacement.

[0045] Specifically, through the water pressure regulating mechanism 7, the water pressure regulating valve 74 can be connected to the drill bit 1 through the first connecting pipe 71, and the water pressure regulating valve 74 can be connected to the drill rod through the second connecting pipe 76. The water pressure can be flexibly adjusted according to the actual drilling needs to achieve the best drilling effect.

[0046] Specifically, the monitoring mechanism 8 is provided to monitor the working state of the drill bit 1 and the coal quality outside the drill bit 1 in real time, and feed the data back to the control system so as to adjust the drilling parameters or issue an early warning in time, thereby effectively reducing the occurrence of safety accidents.

[0047] Working principle:

[0048] First, the pressure sensor 81, the temperature sensor 82, the vibration sensor 83, the rotation speed sensor 84, the displacement sensor 85 and the gas concentration sensor 86 are fixedly installed in the first groove 2, and then the mounting member 61 is fixedly installed in the second groove 4, and the water pipe 64 is threadedly connected to the inside of the thread groove 63 through the threaded member 65, and the first plug-in pipe 73 of the water pressure regulating valve 74 is plugged into the inside of the first slot 72 of the first connecting pipe 71, and the second plug-in pipe 75 of the water pressure regulating valve 74 is plugged into the inside of the second connecting pipe The second slot 77 of 76 is then connected to the drill bit 1 and the drill rod, and the water pressure is adjusted by the water pressure regulating valve 74. When the drill bit 1 is working, when the drill bit 1 is working normally, high-pressure water enters the two symmetrical first fan-shaped water outlet holes 504 of the valve seat 503 in the drill bit 1 through the drill rod. Since the first fan-shaped water outlet holes 504 of the valve seat 503 and the second fan-shaped water outlet holes 506 of the valve core 505 are staggered at 90 degrees, the valve core 505 overcomes the elastic force of the spring 507 and is pushed open under the action of the high-pressure water in the drill rod, and the high-pressure water flows along the valve core 505 and The joint body 508 flows through the water outlet 3 of the drill bit 1 and sprays out of the hole. When the hole cannot be constructed normally due to gas pressure or high water pressure of the collapsed hole, the operator outside the hole relieves the water pressure inside the drill pipe, and the gas, high-pressure water and coal slag in the borehole will return to the drill bit 1 again through the water outlet 3 of the drill bit 1. At this time, the valve core 505 has been tightly combined with the valve seat 503 under the action of the spring 507 when the drill pipe is relieved. The first fan-shaped water outlet hole 504 of the valve seat 503 and the second fan-shaped water outlet hole 506 of the valve core 505 are closed, and the high pressure outside the drill bit 1 Water cannot enter the drill bit 1 and the drill rod, and the coal slag is blocked by the coal slag interception grid 66, which effectively prevents the high-pressure coal slag in the borehole from flowing back into the drill bit 1 and the drill rod. At the same time, when drilling, the pressure sensor 81, temperature sensor 82, vibration sensor 83, speed sensor 84, displacement sensor 85 and gas concentration sensor 86 in the monitoring mechanism 8 can monitor the working status of the drill bit 1 and the coal quality outside the drill bit 1 in real time, and feed the data back to the control system so as to adjust the drilling parameters or issue an early warning in time. At this point, the entire work process ends.

[0049] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0051] It should be noted that the device structure and the drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above invention, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field.

[0052] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations are made to these embodiments without departing from the principle and spirit of the present invention, and they still fall within the protection scope of the present invention.

Claims

1. A blowout prevention drill bit for coal seam drilling construction, comprising a drill bit (1) and a blowout prevention mechanism (5), Features: A coal slag interception mechanism (6) is provided on the left side of the drill bit (1), a water pressure regulating mechanism (7) is provided on the right side of the blowout prevention mechanism (5), and a monitoring mechanism (8) is provided on the outer wall of the drill bit (1); The blowout prevention mechanism (5) is arranged on a side of the drill bit (1) away from the coal slag interception mechanism (6), and comprises a connecting rod (501), wherein the connecting rod (501) is fixedly connected to a valve seat (503) via a first retaining spring (502), wherein a first fan-shaped water outlet hole (504) is provided inside the valve seat (503), wherein the valve seat (503) is movably connected to a spring (507) via a valve core (505), wherein a second fan-shaped water outlet hole (506) is provided inside the valve core (505), and wherein the spring (507) is movably connected to a second retaining spring (509) via a joint body (508); The cinder interception mechanism (6) comprises a mounting member (61), an impact head (62) being fixedly mounted on the upper surface of the mounting member (61), the mounting member (61) being movably connected to a threaded member (65) via a threaded groove (63), and the threaded member (65) being fixedly connected to a cinder interception grille (66) via a water pipe (64); Six groups of first grooves (2) are provided on the outer wall of the drill bit (1), and the six groups of first grooves (2) are distributed in an array along the circumference of the outer wall of the drill bit (1); a water outlet (3) is provided on the left side surface of the drill bit (1) near the middle position, and a second groove (4) is provided on the outer side of the water outlet (3); The left end of the connecting rod (501) is fixedly mounted on the right end of the drill bit (1); the first retaining ring (502) is fixedly mounted on the inner wall of the connecting rod (501) near the right end; the valve seat (503) is fixedly mounted on the left end of the first retaining ring (502); a sealing member (510) is fixedly mounted on the outer wall of the valve seat (503); and the outer wall of the sealing member (510) abuts against the inner wall of the connecting rod (501); The second retaining spring (509) is fixedly mounted on the inner wall of the drill bit (1); the left end of the joint body (508) is fixedly mounted on the right end of the second retaining spring (509); the left end of the spring (507) is fixedly mounted on the right end of the joint body (508); the left end of the spring (507) is fixedly connected to the left end of the valve core (505); the valve core (505) is slidably connected to the inside of the drill bit (1); the right end of the valve core (505) abuts against the left end of the valve seat (503); and the first fan-shaped water outlet hole (504) and the second fan-shaped water outlet hole (506) are staggered at 90 degrees. The threaded member (65) is fixedly mounted on the outer wall of the water pipe (64), the threaded member (65) and the thread groove (63) are threadedly connected, and the cinder intercepting grid (66) is fixedly mounted on the inner wall of the water pipe (64) near the upper end.

2. A blowout prevention drill bit for coal seam drilling construction according to claim 1, Features: The water pressure regulating mechanism (7) comprises a first connecting pipe (71), the left end of the first connecting pipe (71) being fixedly mounted on the right end of the connecting rod (501), a first slot (72) being provided on the inner wall of the right end of the first connecting pipe (71), a first plug-in pipe (73) being plugged into the interior of the first slot (72), and a water pressure regulating valve (74) being fixedly mounted on the right end of the first plug-in pipe (73).

3. A blowout prevention drill bit for coal seam drilling construction according to claim 2, Features: A second plug-in pipe (75) is fixedly mounted on the right end of the water pressure regulating valve (74), and the second plug-in pipe (75) is movably connected to a second connecting pipe (76) via a second slot (77).

4. A blowout prevention drill bit for coal seam drilling construction according to claim 2, Features: The monitoring mechanism (8) comprises a pressure sensor (81), a temperature sensor (82), a vibration sensor (83), a rotation speed sensor (84), a displacement sensor (85) and a gas concentration sensor (86); the pressure sensor (81), the temperature sensor (82), the vibration sensor (83), the rotation speed sensor (84), the displacement sensor (85) and the gas concentration sensor (86) are respectively fixedly mounted inside the six groups of first grooves (2).

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