Composite drill bit of rotary drilling rig

Abstract

The invention relates to the field of rotary drilling machine drill bits, in particular to a rotary drilling rig composite drill bit which comprises a drill cylinder and a guide column arranged in the drill cylinder, a polygonal mounting block is arranged at the end of the guide column, a rectangular groove is formed in each side edge of the polygonal mounting block, and a rectangular guide groove is formed in each rectangular groove. An excavating mechanism is arranged in each rectangular guide groove, each excavating mechanism comprises a square block capable of moving along the track of the corresponding rectangular guide groove, a square sliding block is connected with a hinge seat through a connecting rod, a strip-shaped mounting plate is rotatably arranged on the hinge seat, and a plurality of excavating teeth are arranged on the strip-shaped mounting plate; an adjusting mechanism for rotating the strip-shaped mounting plate is also arranged in the rectangular groove; a soil discharging mechanism used for pushing soil is further arranged in the drilling barrel. Through alternate use of the multiple mounting plates, the service life is prolonged; and the mounting plate can be prevented from being interfered by soil, and stable operation of the mounting plate is ensured.

Description

Technical Field

[0001] The invention relates to the field of rotary drilling rig drill bits, in particular to a composite drill bit for a rotary drilling rig. Background Art

[0002] The global commitment to reducing greenhouse gas emissions and achieving the "dual carbon" (carbon peak and carbon neutrality) goals is becoming increasingly urgent. As a major consumer of energy and resources, the mining industry faces tremendous pressure to reduce emissions. Among them, rotary drilling technology has been widely used in low-carbon mining (especially overburden stripping in open-pit mines and soft rock mining) and geological exploration due to its advantages such as high efficiency, environmental protection (low noise, low vibration, no mud pollution), and good hole quality.

[0003] Chinese Patent: CN119122448B discloses a composite drill bit for a rotary drilling rig, relating to the field of construction technology, comprising: a rotating cylinder; a mounting ring, one side of which is hinged to the bottom of the rotating cylinder and the other side of which is detachably connected to the bottom of the rotating cylinder via a fixing mechanism; two digging mechanisms, both of which are mounted on the inner ring of the mounting ring, the digging mechanisms comprising an inclined digging plate, both sides of which have digging shovel edges, and a plurality of digging drill teeth are provided on the digging shovel edges, the two digging shovel edges being respectively in a flat working state and an idle tilted state; and a rotating mounting mechanism, which is disposed inside the mounting ring.

[0004] This invention changes the digging direction of the excavation drill teeth by rotating two inclined digging plates; if stones remaining in the soil accumulate on the inclined digging plates, the two inclined digging plates will be unable to rotate when the digging direction is changed, causing the equipment to get stuck. Summary of the Invention

[0005] The main purpose of the present invention is to provide a composite drill bit for a rotary drilling rig, which can prolong its service life by alternately using multiple mounting plates; and the mounting plates can move along the corresponding rectangular guide groove tracks, so that when the mounting plates rotate, the interference of soil is avoided, thereby ensuring the stable operation of the mounting plates.

[0006] To achieve the above-mentioned objectives, the present invention provides a composite drill bit for a rotary drilling rig, comprising a drill barrel, an excavation mechanism, an adjustment mechanism and a soil discharge mechanism; a plurality of side teeth are circumferentially arranged at the lower end of the drill barrel, a guide column is coaxially arranged inside the drill barrel, a polygonal mounting block is arranged at the lower end of the guide column, each outer wall of the polygonal mounting block is provided with a rectangular groove, and a rectangular guide groove is provided on the inner wall of the bottom of each rectangular groove; there are multiple groups of excavation mechanisms, the excavation mechanism comprises a square slider capable of moving along the corresponding rectangular guide groove trajectory, the square slider is connected to a hinge seat through a connecting rod, a rotating shaft is rotatably provided on the hinge seat, and a strip mounting plate is provided at one end of the rotating shaft away from the hinge seat, and each strip mounting plate is equidistantly provided with a plurality of excavation teeth along the length direction; there are multiple groups of adjustment mechanisms, the adjustment mechanisms are arranged in the corresponding rectangular grooves and are used to rotate the corresponding rotating shafts; the soil discharge mechanism is arranged inside the drill barrel and is used to discharge the soil inside the drill barrel, the soil discharge mechanism comprises a lower pressure plate slidably arranged inside the drill barrel, a directional hole for avoiding the guide column is provided at the center of the lower pressure plate, and the lower pressure plate can move back and forth along the axis of the guide column.

[0007] Preferably, the adjustment mechanism includes an adjusting rack; the adjusting rack is arranged on the inner wall of the corresponding rectangular groove near the drill barrel opening, and each rotating shaft is also provided with an adjusting gear that cooperates with the adjusting rack, and each rotating shaft is also provided with a reset torsion spring for maintaining the vertical state of the strip mounting plate.

[0008] Preferably, a mounting groove is provided at the lower end of the guide column, and a synchronization mechanism for driving the movement of the plurality of square sliders and the lower pressure plate is provided in the mounting groove.

[0009] The transmission gear of the present invention is a gear which is connected with the gear of the driven gear of the driven gear. The gear of the driven gear is connected with the gear of the driven gear of the driven gear to the gear of the driven gear. When the gear of the driven gear is turned, the electric arc of the transmission gear and the gear of the driven gear are connected with the gear of the driven gear of the driven gear. When the gear is turned, the electric arc of the transmission gear and the gear of the driven gear are connected with the gear of the driven gear of the driven gear. Two traction ropes are mirror-imaged at the bottom of the lower pressure plate, and both traction ropes are wound around the reel.

[0010] Preferably, arc-shaped baffles are provided on both sides of the installation groove, and each arc-shaped baffle is provided with a guide hole for the traction rope to pass through.

[0011] Preferably, the polygon mounting block is also provided with a center drill bit away from one end of the guide column.

[0012] Preferably, each strip-shaped mounting plate is provided with an arc-shaped blocking plate on both sides of the end close to the polygon mounting block.

[0013] Preferably, the strip-shaped mounting plate is provided with a triangular separation part away from one side of the digging tooth.

[0014] The beneficial effects of the present application compared with the prior art are: 1. The present application cooperates a plurality of square sliders and a polygon mounting block. When the rotary digging direction is adjusted, the square sliders move along the corresponding rectangular guide groove, so that the strip-shaped mounting plate can be separated from the soil or stone at the bottom of the hole by a distance, and then the angle of the strip-shaped plate is adjusted by adjusting the rack, so that the strip-shaped mounting plate is not stuck by the soil or stone, and the direction conversion cannot be performed.

[0015] 2. The present application adjusts the positions of a plurality of square sliders, so that the positions of each two square sliders in the corresponding rectangular guide groove are centrally symmetric with respect to the center point of the rectangular guide groove, and then when rotary digging is performed, the digging teeth on half of the strip-shaped mounting plates do not contact the soil, so that the alternating use of a plurality of strip-shaped mounting plates can be realized, the wear is reduced, and the service life is improved.

[0016] 3. The present application cooperates the strip-shaped mounting plate and the pressing disc. When the soil needs to be discharged, the third bevel gear is driven to rotate by the double-shaft motor, the third bevel gear is engaged with the bevel gear, the winding shaft is driven to rotate by the one-way bearing, so that the pressing disc can move towards the opening direction of the drill cylinder, so as to discharge the soil in the drill cylinder, and due to the rotation of the double-shaft motor, the strip-shaped mounting plates can move along the corresponding rectangular guide groove track, and the soil in the drill cylinder is stirred, so as to assist the discharge of the soil. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present application, so that other features, objects and advantages of the present application become more apparent. The illustrative embodiment drawings of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 is a perspective view of the present application; Figure 2 is a front view of the present application; Figure 3 is Figure 2 is a plan view along the A-A direction; Figure 4 is a partial perspective view of the present application Figure 1 ; Figure 5It is a local stereoscopic Figure 2 ; Figure 6 yes Figure 5 A partial enlarged view of point B in the middle; Figure 7 It is a local stereoscopic Figure 3 ; Figure 8 yes Figure 7 A partial enlarged view of point C in the middle; Figure 9 It is a local stereoscopic Figure 4 ; Figure 10 yes Figure 9 A partial enlarged view of point D in the middle; Figure 11 It is a partial three-dimensional exploded view of the present invention; Figure 12 yes Figure 11 A partial enlarged view of point F in the middle.

[0018] The numbers in the above figure are: 1-drill barrel; 11-side teeth; 12-guide column; 121-mounting slot; 122-rewinding shaft; 123-rewinding wheel; 124-one-way bearing; 125-conical teeth; 126-arc baffle; 1261-guide hole; 13-polygonal mounting block; 131-rectangular groove; 132-rectangular guide groove; 133-circular groove; 134-rotating hole; 135-linkage shaft; 136-second bevel gear; 137-elastic telescopic rod; 14-center drill bit; 2-digging mechanism; 21-square slider; 22-connecting rod; 23-hinged seat; 24-rotating shaft; 241-adjusting gear; 242-reset torsion spring; 25-strip mounting plate; 251-digging tooth; 26-arc-shaped blocking plate; 27-triangular separation portion; 3-adjustment mechanism; 31-adjustment rack; 4- soil discharge mechanism; 41- lower pressure plate; 411- directional hole; 42- traction rope; 5-synchronizing mechanism; 51-dual-axis motor; 511-third bevel gear; 52-first bevel gear. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 should fall within the scope of protection of the present invention.

[0020] See also Figures 1 to 12 As shown, a composite drill bit for a rotary drilling rig includes a drill barrel 1, an excavation mechanism 2, an adjustment mechanism 3 and a soil discharge mechanism 4; a plurality of side teeth 11 are circumferentially arranged at the lower end of the drill barrel 1, a guide column 12 is coaxially arranged inside the drill barrel 1, a polygonal mounting block 13 is arranged at the lower end of the guide column 12, each outer wall of the polygonal mounting block 13 is provided with a rectangular groove 131, and a rectangular guide groove 132 is provided on the inner wall of the bottom of each rectangular groove 131, and there are multiple groups of excavation mechanisms 2, and the excavation mechanism 2 includes a square slider 21 that can move along the trajectory of the corresponding rectangular guide groove 132, and the square slider 21 is connected to an articulated seat 23 through a connecting rod 22, and the articulated seat 23 can move along the trajectory of the corresponding rectangular guide groove 132. A rotating shaft 24 is provided so as to be able to rotate, and a strip mounting plate 25 is provided at one end of the rotating shaft 24 away from the hinge seat 23, and each strip mounting plate 25 is provided with a plurality of digging teeth 251 equidistantly provided along the length direction; there are multiple groups of adjustment mechanisms 3, and the adjustment mechanisms 3 are provided in corresponding rectangular grooves 131 and are used to rotate the corresponding rotating shaft 24; the soil discharge mechanism 4 is provided inside the drill barrel 1 and is used to discharge the soil inside the drill barrel 1, and the soil discharge mechanism 4 includes a lower pressure plate 41 slidably provided inside the drill barrel 1, and a directional hole 411 for avoiding the guide column 12 is provided at the center of the lower pressure plate 41, and the lower pressure plate 41 can move back and forth along the axis of the guide column 12.

[0021] A polygonal mounting block 13 (preferably a regular hexagonal shape in this application) is provided at the lower end of the guide column 12, and each side of the polygonal mounting block 13 is provided with a rectangular groove 131, and each rectangular groove 131 is provided with a rectangular guide groove 132, and each rectangular guide groove 132 is provided with a square slider 21 that can move along its trajectory. When it is necessary to change the rotary digging direction of the drill barrel 1, the corresponding rotating shaft 24 is rotated by the adjusting mechanism 3, so that the excavating teeth 251 on the strip mounting plate 25 can face the rotation direction of the drill barrel 1, and when the adjusting mechanism 3 rotates the rotating shaft 24, the square slider 21 can move along the rectangular guide groove 132, and the strip mounting plate 25 can also move along the trajectory of the rectangular guide groove 132, so that the strip mounting plate 25 can be separated from the soil or stones at the bottom of the excavated hole. With the cooperation of the adjusting mechanism 3, the strip mounting plate 25 is rotated and reset to avoid the strip mounting plate 25 being stuck by soil or stones, resulting in the inability to change direction.

[0022] After the rotary drilling is completed, the soil entering the drill barrel 1 is pressed down by the lower pressure plate 41 arranged inside the drill barrel 1. During the pressing process, by moving multiple strip mounting plates 25 along the rectangular guide grooves 132 and rotating the strip mounting plates 25, not only can the strip mounting plates 25 move the soil in the drill barrel 1, thereby loosening the soil and ensuring that the soil can be discharged smoothly to avoid blockage; the soil remaining on the strip mounting plates 25 can also be shaken to avoid soil residue.

[0023] See also Figures 9 to 12 As shown, the adjustment mechanism 3 includes an adjusting rack 31; the adjusting rack 31 is arranged on the inner wall of the corresponding rectangular groove 131 near the opening of the drill tube 1, and each rotating shaft 24 is also provided with an adjusting gear 241 that cooperates with the adjusting rack 31, and each rotating shaft 24 is also provided with a reset torsion spring 242 for maintaining the vertical state of the strip mounting plate 25.

[0024] By providing a reset torsion spring 242, when the adjusting gear 241 on the rotating shaft 24 is not in contact with the adjusting rack 31, the strip mounting plate 25 is kept in a vertical state, thereby ensuring that the adjusting gear 241 can accurately engage with the adjusting rack 31; as the square slider 21 moves along the track of the rectangular guide groove 132, the adjusting gear 241 on the rotating shaft 24 can engage with the adjusting rack 31, so that the strip mounting plate 25 set in a vertical state can be tilted to the corresponding angle according to the rotation direction, thereby completing the change of the direction of the excavating tooth 251.

[0025] Secondly, in order to avoid the overheating of the digging teeth 251 due to continuous work, the positions of multiple square sliders 21 are adjusted so that the positions of every two square sliders 21 corresponding to the rectangular guide groove 132 can be centrally symmetrical compared to the center point of the rectangular guide groove 132. As a result, when rotary digging is carried out, the digging teeth 251 on half of the strip mounting plates 25 will not come into contact with the soil, thereby enabling the alternating use of multiple strip mounting plates 25, reducing wear and improving service life.

[0026] See also Figure 3 、 Figures 5 to 12As shown, a mounting groove 121 is provided at the lower end of the guide column 12, and a synchronization mechanism 5 for driving the movement of multiple square sliders 21 and the movement of the lower pressure plate 41 is provided in the mounting groove 121; the synchronization mechanism 5 includes a dual-axis motor 51 and a first bevel gear 125 wheel; a circular groove 133 is provided at the end of the polygonal mounting block 13 away from the guide column 12, and the dual-axis motor 51 is vertically arranged in the mounting groove 121, and the motor shaft of the dual-axis motor 51 close to one end of the circular groove 133 extends into the circular groove 133 and is provided with a first bevel gear 125 wheel; a rotating hole 134 is provided at the center of the inner wall at the bottom of each rectangular groove 131, and a linkage shaft 135 is rotatably provided in each rotating hole 134, and the linkage shaft 135 extends into one end of the circular groove 133 A second bevel gear wheel 125 is provided to cooperate with the first bevel gear wheel 125; an elastic telescopic rod 137 is provided at one end of the linkage shaft 135 close to the rectangular groove 131, and the end of the elastic telescopic rod 137 away from the linkage shaft 135 is sleeved on the connecting rod 22; a third bevel gear wheel 125 is provided on the motor shaft of the dual-axis motor 51 away from the circular groove 133, and a winding shaft 122 is rotatably provided in the mounting groove 121, and a winding wheel 123 is provided at the center of the winding shaft 122, and a one-way bearing 124 is provided on the winding shaft 122, and a bevel gear 125 cooperating with the third bevel gear wheel 125 is provided on the outer wall of the one-way bearing 124; two traction ropes 42 are mirror-imaged at the bottom of the lower pressure plate 41, and both traction ropes 42 are wound around the winding wheel 123.

[0027] The rotating hole 134 is located inside the rectangular guide groove 132, and the first bevel gear 125 wheel is driven to rotate by the dual-axis motor 51. The first bevel gear 125 wheel is meshed with multiple second bevel gear 125 wheels, so that multiple linkage shafts 135 rotate synchronously. The linkage shaft 135 is connected to the corresponding connecting rod 22 through an elastic telescopic rod 137, so that the corresponding square slider 21 can move along the corresponding rectangular guide groove 132 track, thereby adjusting the position of multiple strip mounting plates 25 to facilitate subsequent rotary drilling work; the soil enters the interior of the drill barrel 1 under the guidance of the inclined strip mounting plate 25 and presses the lower pressure plate 41 The jacking is performed, and with the cooperation of the one-way bearing 124, the traction rope 42 can be pulled; when it is necessary to discharge soil, the third bevel gear 125 wheel is driven to rotate by the dual-axis motor 51, and the third bevel gear 125 wheel is engaged with the bevel gear 125, and the winding shaft 122 is driven to rotate by the one-way bearing 124, so that the lower pressure plate 41 can move toward the opening direction of the drill barrel 1, thereby discharging the soil in the drill barrel 1, and due to the rotation of the dual-axis motor 51, the multiple strip mounting plates 25 can be moved along the corresponding rectangular guide groove 132 trajectory, and the soil in the drill barrel 1 is moved, thereby assisting in the discharge of soil.

[0028] See also Figure 4As shown, arc-shaped baffles 126 are provided on both sides of the installation groove 121, and each arc-shaped baffle 126 is provided with a guide hole 1261 for the traction rope 42 to pass through.

[0029] By providing an arc-shaped baffle 126, the dual-axis motor 51 can be protected to prevent mud from entering the interior of the dual-axis motor 51, and by providing a guide hole 1261 on the arc-shaped baffle 126, the traction rope 42 can be guided to prevent the traction rope 42 from being entangled, ensuring that the winding wheel 123 can accurately wind up the traction rope 42.

[0030] See also Figure 1 As shown, a center drill bit 14 is further provided at one end of the polygonal mounting block 13 away from the guide column 12 .

[0031] A center drill bit 14 is provided on the polygonal mounting block 13 so that the soil at the center can be rotary drilled, thereby ensuring the rotary drilling effect.

[0032] See also Figure 8 As shown, arc-shaped blocking plates 26 are provided on both sides of one end of each strip-shaped mounting plate 25 close to the polygonal mounting block 13 .

[0033] When the strip mounting plate 25 moves, the arc-shaped blocking plate 26 can cooperate with the strip mounting plate 25 to always block the rectangular groove 131, preventing mud from entering the rectangular groove 131 and ensuring the operational stability of the equipment.

[0034] See also Figure 6 As shown, a triangular separation portion 27 is provided on the side of the strip mounting plate 25 away from the digging teeth 251.

[0035] By providing the triangular separating portion 27 , when the lower pressure plate 41 squeezes the soil, the triangular separating portion 27 can not only move the soil so that the soil falls off quickly, but also prevent the soil from remaining on the strip mounting plate 25 .

[0036] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A composite drill bit for a rotary drilling rig, characterized in that: It includes a drill tube, an excavation mechanism, an adjustment mechanism and an earth discharge mechanism; A plurality of side teeth are circumferentially arranged at the lower end of the drill barrel, a guide column is coaxially arranged inside the drill barrel, a polygonal mounting block is arranged at the lower end of the guide column, each outer wall of the polygonal mounting block is provided with a rectangular groove, and a rectangular guide groove is provided on the inner wall of the bottom of each rectangular groove. There are multiple groups of excavation mechanisms, each of which includes a square slider that can move along the corresponding rectangular guide groove track, the square slider is connected to an articulated seat through a connecting rod, a rotating shaft is rotatably provided on the articulated seat, and a strip mounting plate is provided at the end of the rotating shaft away from the articulated seat, and each strip mounting plate is provided with a plurality of excavation teeth equidistantly along the length direction; There are multiple groups of adjustment mechanisms, each of which is disposed in a corresponding rectangular groove and is used to rotate the corresponding rotation shaft; The soil discharge mechanism is arranged inside the drill barrel and is used to discharge the soil inside the drill barrel. The soil discharge mechanism includes a lower pressure plate slidably arranged inside the drill barrel. A directional hole for avoiding the guide column is provided at the center of the lower pressure plate. The lower pressure plate can move back and forth along the axis of the guide column.

2. The composite drill bit for rotary drilling rig according to claim 1, characterized in that: The adjustment mechanism includes an adjustment rack; The adjusting rack is arranged on the inner wall of one side of the corresponding rectangular groove near the opening of the drill tube. Each rotating shaft is also provided with an adjusting gear that cooperates with the adjusting rack. Each rotating shaft is also provided with a reset torsion spring for keeping the strip mounting plate in a vertical state.

3. The composite drill bit for rotary drilling rig according to claim 1, characterized in that: The lower end of the guide column is provided with a mounting groove, and a synchronization mechanism for driving the movement of multiple square sliders and the lower pressure plate is provided in the mounting groove.

4. The composite drill bit for rotary drilling rig according to claim 3, characterized in that: The synchronization mechanism includes a dual-shaft motor and a first bevel gear; A circular groove is provided at one end of the polygonal mounting block away from the guide column, the dual-axis motor is vertically arranged in the mounting groove, the motor shaft of the dual-axis motor close to one end of the circular groove extends into the circular groove and is provided with a first bevel gear; A rotating hole is provided at the center of the inner wall at the bottom of each rectangular groove, a linkage shaft is rotatably provided in each rotating hole, and a second bevel gear that cooperates with the first bevel gear is provided at one end of the linkage shaft extending into the circular groove; An elastic telescopic rod is provided at one end of the linkage shaft close to the rectangular groove, and an end of the elastic telescopic rod away from the linkage shaft is sleeved on the connecting rod; A third bevel gear is provided on the motor shaft of the dual-axis motor away from one end of the circular groove, a reeling shaft is rotatably provided in the mounting groove, a reeling wheel is provided at the center of the reeling shaft, a one-way bearing is provided on the reeling shaft, and a bevel tooth that cooperates with the third bevel gear is provided on the outer wall of the one-way bearing; Two traction ropes are mirror-imaged at the bottom of the lower pressure plate, and both traction ropes are wound around the reel.

5. The composite drill bit for rotary drilling rig according to claim 4, characterized in that: Arc-shaped baffles are provided on both sides of the installation groove, and each arc-shaped baffle is provided with a guide hole for the traction rope to pass through.

6. The composite drill bit for rotary drilling rig according to claim 4, characterized in that: A center drill bit is also provided on one end of the polygonal mounting block away from the guide column.

7. The composite drill bit for rotary drilling rig according to claim 1, characterized in that: Arc-shaped blocking plates are provided on both sides of one end of each strip-shaped mounting plate close to the polygonal mounting block.

8. The composite drill bit for rotary drilling rig according to claim 1, characterized in that: A triangular separation portion is provided on one side of the strip-shaped mounting plate away from the digging teeth.

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