One-time hole anchor drill bit

Abstract

The present invention relates to the technical field of anchor rock drill bits, and in particular to a one-time hole-forming anchor rock drill bit, comprising a cylindrical drill bit body, the drill bit body being provided with at least three first strip-shaped through holes, the interior of each of the first strip-shaped through holes being fixedly mounted with an arc-shaped plate; the arc-shaped plate being provided with a second strip-shaped through hole, the interior of each of the second strip-shaped through holes being rotatably provided with an arc-shaped rod via a first shaft, the arc-shaped rod being divided into a first portion and a second portion by the first shaft, the length of the first portion being greater than the length of the second portion; the upper surface of the first portion being provided with a first pin hole, the interior of the first pin hole being penetrated by a second positioning pin, the second positioning pin being controlled to rise and fall by an extrusion component; when the extrusion component is squeezed to the position directly below the second positioning pin, the top of the second positioning pin protrudes from the top surface of the arc-shaped rod and is inserted into a blind hole provided on the top wall of the second strip-shaped through hole. The present invention can reduce the cost and difficulty of core extraction.

Description

Technical Field

[0001] The invention relates to the technical field of anchor rock drilling rig drill bits, in particular to a one-time hole-forming anchor rock drilling rig drill bit. Background Art

[0002] The anchor rock pile mud removal adopts the rotary drilling technology. After the pick drill drills to the medium weathered rock layer and completes the cleaning, the anchor rock drill bit is replaced to carry out the rock embedding and hole-making operation in the medium weathered rock layer.

[0003] The anchor drill bit is cylindrical in shape, with teeth at its bottom. The entire bit rotates to drill holes in moderately weathered rock formations. After drilling, a rock core is embedded within the bit and lifted above the surface along with the drill bit. Therefore, the rock core needs to be cleaned after the drilling operation is completed. Furthermore, the length of this drill bit is typically 6-10 meters, and the rock core inside the drill bit is relatively long, making it prone to breaking and becoming stuck inside the drill bit. This makes cleaning the rock core difficult and expensive. Summary of the Invention

[0004] The object of the present invention is to provide a drill bit for an anchor rock drill capable of forming a hole in one go, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A drill bit for an anchor rock drill rig capable of forming a hole in one go comprises a cylindrical drill bit body, the drill bit body being provided with at least three first strip-shaped through holes, and an arc-shaped plate being fixedly installed inside the first strip-shaped through holes;

[0007] A second strip-shaped through hole is formed on the curved plate, and a curved rod is rotatably provided inside the second strip-shaped through hole via a first shaft. The curved rod is divided into a first portion and a second portion by the first shaft, and the length of the first portion is greater than the length of the second portion.

[0008] A first pin hole is provided on the upper surface of the first part, and a second positioning pin passes through the interior of the first pin hole. The second positioning pin is controlled to rise and fall by an extrusion component; when the extrusion component is squeezed to the bottom of the second positioning pin, the top of the second positioning pin passes through the top surface of the arc rod and is inserted into a blind hole provided on the top wall of the second strip through hole; when the extrusion component is moved away from the bottom of the second positioning pin, the top of the second positioning pin completely withdraws from the blind hole.

[0009] Preferably, the extrusion component includes an arc-shaped extension rod, and the outer arc surface of the first part is provided with an arc-shaped groove, and the extension rod can be stored inside the arc-shaped groove, or rotated and unfolded from the inside of the arc-shaped groove;

[0010] One end of the extension rod away from the first shaft is rotatably connected to the first part through the second shaft;

[0011] The extension rod and the first part are fixedly connected via a latch component.

[0012] Preferably, the latch component includes a protruding block and a first positioning pin, and the protruding block is fixed to an end surface of the extension rod away from the first shaft body;

[0013] A first receiving groove is vertically formed on the upper surface of the arc-shaped rod, and a second pin hole is formed at the center of the inner bottom surface of the first receiving groove;

[0014] A fourth pin hole is vertically opened on the protruding block;

[0015] When the extension rod is rotated and expanded from the inside of the arc-shaped slot, the first positioning pin passes through the second pin hole and is partially inserted into the inside of the fourth pin hole;

[0016] An arc groove is provided on the inner wall surface of the arc groove to provide a channel for the rotation of the protruding block.

[0017] Preferably, the first positioning pin includes a pin rod, an end fixed to the top end of the pin rod, and a pull ring rotatably connected to the end head;

[0018] The first receiving groove is used for receiving the end head and the pull ring.

[0019] Preferably, a groove is provided on the inner arc surface of the extension rod, an inclined piece is fixed inside the groove, and an inclined hole adapted to the inclined piece is provided on the second positioning pin.

[0020] Preferably, the second positioning pin is cylindrical, a plane is provided on its circumferential surface, and one end of the inclined hole is located on the plane.

[0021] Preferably, the arc-shaped plate is fixedly mounted inside the first strip-shaped through hole by fasteners.

[0022] Preferably, both ends of the arc-shaped plate are provided with receiving holes;

[0023] The fastener comprises a fixedly connected bolt head, a frustum block, a connecting rod and a stud, and the bolt head is arranged inside the receiving hole.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention provides at least three arc rods at the bottom of the drill bit body, and each arc rod is rotatably connected to the drill bit body through a first shaft body, so that when needed, the principle of leverage can be used to push the rock core that is tilted and stuck inside the drill bit body to a state coaxial or approximately coaxial with the drill bit body, so that the rock core can fall directly from the inside of the drill bit body by its own gravity, which brings convenience to the removal of the rock core and can reduce the cost and difficulty of core removal. In addition, since the arc rods are arranged in the second strip-shaped through holes of the arc plate, the installation and disassembly of the first shaft body can be facilitated, thereby facilitating the installation and disassembly of the arc rods. Moreover, when the drill bit body is in working state, neither the arc rods nor the arc plate protrudes from the inner and outer circumferential surfaces of the drill bit body, so the friction resistance encountered by the drill bit body during operation can be minimized.

[0026] 2. In the present invention, the position of the second positioning pin can be adjusted by rotating the extension rod with the second axis as the center of the circle, that is, when the extension rod is received in the arc groove, the top of the second positioning pin passes through the top surface of the arc rod and is inserted into the blind hole opened on the top wall of the second strip-shaped through hole, and when the extension rod is rotated and unfolded from the inside of the arc groove, the top of the second positioning pin is completely withdrawn from the blind hole, which facilitates the release of the locked state of the arc rod; at the same time, after the extension rod is rotated out from the inside of the arc groove, it can also extend the length of the first part, that is, increase the length of the power arm, so that the core displacement inside the drill bit body can be pushed more effortlessly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall front view structure of the present invention;

[0028] Figure 2 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0029] Figure 3 Schematic diagram of the structure of the curved plate of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the fastener of the present invention;

[0031] Figure 5 Schematic diagram of the structure of the arc rod of the present invention;

[0032] Figure 6 It is a cross-sectional perspective view of the arc rod and a schematic diagram of the extended rod structure of the present invention;

[0033] Figure 7 For the present invention Figure 6 Schematic diagram of the local structure;

[0034] Figure 8 Schematic diagram of the cross-sectional three-dimensional structure of the arc rod of the present invention;

[0035] Figure 9 Schematic diagram of the structure of the first positioning pin of the present invention;

[0036] Figure 10 It is a structural schematic diagram of the extension rod of the present invention;

[0037] Figure 11 is a schematic cross-sectional perspective structural diagram of the second positioning pin of the present invention;

[0038] Figure 12 This is a structural schematic diagram of the first positioning pin of the present invention inserted into the third pin hole;

[0039] Figure 13 This is a structural schematic diagram of the first positioning pin of the present invention inserted into the second pin hole.

[0040] In the figure: 1, drill bit body; 101, first strip through hole; 2, curved plate; 201, storage hole; 202, second strip through hole; 3, fastener; 301, bolt head; 302, truncated cone block; 303, connecting rod; 304, stud; 4, curved rod; 401, first part; 402, second part; 403, curved groove; 404, first pin hole; 405, second pin hole; 406, First receiving groove; 407, third pin hole; 408, second receiving groove; 409, arc groove; 5, first axis; 6, extension rod; 601, groove; 602, oblique piece; 7, second axis; 8, protruding block; 801, fourth pin hole; 9, first positioning pin; 901, pin rod; 902, end; 903, pull ring; 10, second positioning pin; 1001, plane; 1002, oblique hole. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] See also Figures 1-13 , the present invention provides a technical solution:

[0043] The one-time hole-forming anchor rock drilling rig drill bit includes a cylindrical drill bit body 1. In this embodiment, the drill bit body 1 is 8 meters long and 0.3 meters in diameter. Teeth are installed at the bottom end for annularly cutting and crushing the stratum to form an annular crushing zone. The uncrushed rock core is located inside the drill bit body 1. The above are all existing technologies and will not be elaborated here.

[0044] Different from the prior art, at least three first strip-shaped through holes 101 are provided on the drill bit body 1. For the convenience of explanation, in this embodiment, three first strip-shaped through holes 101 are taken as an example. It can be seen from the figure that the heights of the three first strip-shaped through holes 101 on the drill bit body 1 are different. Generally speaking, the three first strip-shaped through holes 101 are arranged in sequence in the vertical direction, but the three first strip-shaped through holes 101 are staggered with each other in the circumferential direction.

[0045] An arc-shaped plate 2 is fixedly installed inside each first strip-shaped through hole 101. In this embodiment, the arc-shaped plate 2 is semi-circular, and its thickness is the same as the wall thickness of the drill body 1, and the center of the arc-shaped plate 2 is located on the axis of the drill body 1. The advantage of such a setting is that the outer peripheral surface of the drill body 1 can be kept flat, and there will be no situation where the arc-shaped plate 2 partially protrudes from the outer peripheral surface of the drill body 1, which can reduce the friction resistance of the drill body 1 during drilling. Specifically, the arc-shaped plate 2 is fixedly installed inside the first strip-shaped through hole 101 by a fastener 3. Specifically, both ends of the arc-shaped plate 2 are provided with Storage hole 201; the fastener 3 includes a fixedly connected bolt head 301, a frustum block 302, a connecting rod 303 and a stud 304, and the bolt head 301 is arranged inside the storage hole 201, so that the entire fastener 3 can be stored to prevent the fastener 3 from protruding from the outer peripheral surface of the drill body 1, thereby reducing the friction resistance of the drill body 1 during drilling; at the same time, such a setting also facilitates the installation and disassembly of the arc plate 2, making it easy to replace it when needed, and at the same time, it also brings convenience to the installation and disassembly of the arc rod 4 below, which is specifically reflected in the installation and disassembly of the first shaft body 5.

[0046] The arc plate 2 is provided with a second strip-shaped through hole 202, and an arc rod 4 is rotatably provided inside the second strip-shaped through hole 202 through a first shaft 5. The arc rod 4 is divided into a first part 401 and a second part 402 by the first shaft 5, and the length of the first part 401 is greater than the length of the second part 402; specifically, the first shaft 5 serves as the fulcrum of the lever, the first part 401 serves as the power arm of the lever, and the second part 402 serves as the resistance arm of the lever. Since the length of the first part 401 is greater than the length of the second part 402, a force-saving lever can be formed. Furthermore, during the operation of the drill bit body 1, the arc rod 4 is completely received inside the second strip-shaped through hole 202. At this time, the arc rod 4 does not protrude from the inner circumference or outer circumference of the drill bit body 1. When the rock core inside the drill bit body 1 needs to be cleaned after the drilling is completed, the first part 401 can be pulled outward away from one end of the first shaft body 5, so that the second part 402 can be moved away from one end of the first shaft body 5 toward the inside of the drill bit body 1, thereby pushing the rock core that is tilted and stuck inside the drill bit body 1, so that the rock core gradually becomes coaxial with the drill bit body 1, so that the rock core falls out from the inside of the drill bit body 1 by its own gravity; therefore, the purpose of setting at least three arc plates 2 is to be able to push the rock core tilted at any angle to a state coaxial with the drill bit body 1, so as to facilitate the removal of the rock core.

[0047] A first pin hole 404 is provided on the upper surface of the first part 401, and a second positioning pin 10 is passed through the interior of the first pin hole 404, and the second positioning pin 10 is controlled to rise and fall by an extrusion component; when the extrusion component is squeezed to the bottom of the second positioning pin 10, the top of the second positioning pin 10 passes through the top surface of the arc rod 4 and is inserted into the blind hole provided on the top wall of the second bar through hole 202. At this time, the arc rod 4 is fixed to the inside of the second bar through hole 202 by the second positioning pin 10; when the extrusion component is moved away from the bottom of the second positioning pin 10, the top of the second positioning pin 10 is completely withdrawn from the blind hole, and the first part 401 can be pulled away from one end of the first shaft body 5. That is, if you want to use the arc rod 4 fixed inside the second bar through hole 202, you need to pull the extrusion component so that the top of the second positioning pin 10 is completely withdrawn from the blind hole.

[0048] The second positioning pin 10 is cylindrical, and a flat surface 1001 is provided on the circumference thereof, so that the entire second positioning pin 10 is an incomplete cylindrical structure with a flat surface 1001 .

[0049] In the above scheme, by arranging at least three arc rods 4 at the bottom of the drill bit body 1, and each arc rod 4 is rotatably connected to the drill bit body 1 through the first shaft body 5, the principle of lever can be used to push the rock core that is tilted and stuck inside the drill bit body 1 to a state coaxial or approximately coaxial with the drill bit body 1 when needed, so that the rock core can fall directly from the inside of the drill bit body 1 by its own gravity, which brings convenience to the removal of the rock core and reduces the cost and difficulty of removing the rock core. In addition, since the arc rod 4 is arranged in the second strip-shaped through hole 202 of the arc plate 2, the installation and disassembly of the first shaft body 5 can be facilitated, which in turn provides convenience for the installation and disassembly of the arc rod 4. Moreover, when the drill bit body 1 is in the working state, the arc rod 4 and the arc plate 2 will not protrude from the inner and outer circumferential surfaces of the drill bit body 1, so the friction resistance encountered by the drill bit body 1 during operation can be minimized.

[0050] The extrusion component includes an arc-shaped extension rod 6, and an arc-shaped groove 403 is provided on the outer arc surface of the first part 401. The end of the extension rod 6 away from the first shaft body 5 is rotatably connected to the first part 401 through the second shaft body 7, so that the extension rod 6 can be stored inside the arc-shaped groove 403, or rotated and unfolded from the inside of the arc-shaped groove 403; specifically, when the extension rod 6 is stored inside the arc-shaped groove 403, it has no part protruding from the outer arc surface of the arc rod 4; the extension rod 6 and the first part 401 are fixedly connected by a pin component.

[0051] In the above scheme, when the extension rod 6 is received inside the arc groove 403, the top of the second positioning pin 10 passes through the top surface of the arc rod 4 and is inserted into the blind hole opened on the inner top wall of the second strip through hole 202. When the extension rod 6 is rotated and unfolded from the inside of the arc groove 403, the top of the second positioning pin 10 is completely withdrawn from the blind hole. At this time, the first part 401 can be pulled away from one end of the first shaft 5, that is, the position of the second positioning pin 10 can be adjusted by rotating the extension rod 6 with the second shaft 7 as the center of the circle; at the same time, after the extension rod 6 is unscrewed from the inside of the arc groove 403, it can also extend the length of the first part 401, that is, increase the length of the power arm, so that the core displacement inside the drill bit body 1 can be pushed more effortlessly.

[0052] The latch member includes a protruding block 8 and a first positioning pin 9. The protruding block 8 is fixed to the end face of the extension rod 6 away from the first shaft 5. A first receiving groove 406 is vertically opened on the upper surface of the arc rod 4, and a second pin hole 405 is opened at the center position of the inner bottom surface of the first receiving groove 406. A fourth pin hole 801 is vertically opened on the protruding block 8. Figure 13As can be seen, when the extension rod 6 is rotated and deployed from the interior of the arcuate slot 403, the first positioning pin 9 passes through the second pin hole 405 and partially inserts into the interior of the fourth pin hole 801. The inner wall of the arcuate slot 403 is provided with an arcuate groove 409 to provide a channel for the rotation of the protruding block 8. The first positioning pin 9 serves to fix the position of the extension rod 6 after it is rotated and deployed from the interior of the arcuate slot 403, thereby firmly connecting it to the first portion 401 as a whole.

[0053] The first positioning pin 9 includes a pin rod 901, an end 902 fixed to the top of the pin rod 901, and a pull ring 903 rotatably connected to the end 902. The first receiving groove 406 is used to receive the end 902 and the pull ring 903. Furthermore, to prevent the first positioning pin 9 from being lost, a second receiving groove 408 is vertically formed on the upper surface of the arc-shaped rod 4, and a third pin hole 407 is formed on the inner bottom surface of the second receiving groove 408. When the first positioning pin 9 is no longer needed, the pin rod 901 of the first positioning pin 9 can be inserted into the interior of the third pin hole 407. At this time, the bottom end of the third pin hole 407 does not contact the extension rod 6.

[0054] The inner arc surface of the extension rod 6 is provided with a groove 601 , an inclined piece 602 is fixed inside the groove 601 , and the second positioning pin 10 is provided with an inclined hole 1002 adapted to the inclined piece 602 , and one end of the inclined hole 1002 is located on the plane 1001 . Specifically, the bevel 602 can rotate together with the extension rod 6. In the process of the extension rod 6 being rotated out from the inside of the arc groove 403, the bevel 602 cooperates with the inclined hole 1002 to push the second positioning pin 10 to move downward, so that the top of the second positioning pin 10 is completely withdrawn from the blind hole. At this time, the first part 401 can be pulled away from one end of the first shaft body 5; and when the extension rod 6 is gradually rotated and stored in the inside of the arc groove 403, the bevel 602 can be gradually inserted into the inside of the inclined hole 1002, so that the second positioning pin 10 can be pushed upward and inserted into the blind hole opened on the inner top wall of the second bar through hole 202; there is no limitation on the specific structure of the bevel 602 and the inclined hole 1002. The present technical solution only needs to ensure that the bevel 602 can be smoothly inserted into the inside of the inclined hole 1002 when the extension rod 6 rotates around the second shaft body 7.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A drill bit for an anchor rock drill rig capable of forming a hole in one go, comprising a cylindrical drill bit body, characterized in that: At least three first strip-shaped through holes are formed on the drill body, and arc-shaped plates are fixedly installed inside the first strip-shaped through holes; A second strip-shaped through hole is formed on the curved plate, and a curved rod is rotatably provided inside the second strip-shaped through hole via a first shaft. The curved rod is divided into a first portion and a second portion by the first shaft, and the length of the first portion is greater than the length of the second portion. A first pin hole is formed on the upper surface of the first portion, and a second positioning pin is passed through the interior of the first pin hole. The second positioning pin is controlled to rise and fall by an extrusion component. When the extrusion component is squeezed to the position directly below the second positioning pin, the top of the second positioning pin passes through the top surface of the arc-shaped rod and is inserted into a blind hole formed on the top wall of the second strip-shaped through hole. When the extrusion component is moved away from the position directly below the second positioning pin, the top of the second positioning pin is completely withdrawn from the blind hole. The extrusion component includes an arc-shaped extension rod, and the outer arc surface of the first part is provided with an arc groove, and the extension rod can be stored inside the arc groove or rotated and extended from the inside of the arc groove; One end of the extension rod away from the first shaft is rotatably connected to the first part through the second shaft; The extension rod and the first portion are fixedly connected via a latch component; The latch component includes a protruding block and a first positioning pin, wherein the protruding block is fixed on an end surface of the extension rod away from the first shaft body; A first receiving groove is vertically formed on the upper surface of the arc-shaped rod, and a second pin hole is formed at the center of the inner bottom surface of the first receiving groove; A fourth pin hole is vertically opened on the protruding block; When the extension rod is rotated and expanded from the inside of the arc-shaped slot, the first positioning pin passes through the second pin hole and is partially inserted into the inside of the fourth pin hole; An arc groove is provided on the inner wall surface of the arc groove to provide a channel for the rotation of the protruding block.

2. The one-time hole anchor drill bit according to claim 1, characterized in that: The first positioning pin includes a pin rod, an end head fixed to the top end of the pin rod, and a pull ring rotatably connected to the end head; The first receiving groove is used for receiving the end head and the pull ring.

3. The one-time hole anchor drill bit according to claim 1, characterized in that: A groove is provided on the inner arc surface of the extension rod, an inclined piece is fixed inside the groove, and an inclined hole matched with the inclined piece is provided on the second positioning pin.

4. The one-time hole anchor drill bit according to claim 3, characterized in that: The second positioning pin is cylindrical, and a plane is provided on the circumference thereof, and one end of the inclined hole is located on the plane.

5. The one-time hole anchor drill bit according to claim 1, characterized in that: The arc-shaped plate is fixedly installed inside the first strip-shaped through hole through a fastener.

6. The one-time hole anchor drill bit according to claim 5, characterized in that: Both ends of the curved plate are provided with storage holes; The fastener comprises a fixedly connected bolt head, a frustum block, a connecting rod and a stud, and the bolt head is arranged inside the receiving hole.

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