Novel coring bit
阅读说明：本技术 新型取芯钻头 (Novel coring bit ) 是由 卢明立 刘祥军 刘攀军 陈庚 陈义俊 于 2020-06-23 设计创作，主要内容包括：一种新型取芯钻头,涉及钻探设备技术领域,包括钻头本体,在钻头本体的上部设有提升机构,在钻头本体的下部设有切削取芯机构；钻头本体包括互相套装的外筒和内筒,内、外筒之间通过轴向传扭机构实现同步转动；在外筒上部的正中间设有传扭套；切削取芯机构包括悬挂套装在内筒下部的转环；在转环侧壁上对称装有切削机构；切削机构为拉杆、推杆和刀头构成的连杆机构；拉杆和推杆均为与转环侧壁弧度相适的弧形杆；在钻头本体上设有两组钢丝绳扭转机构；本发明结构设计合理可靠,大大的降低劳动强度,提高钻进效率的新型取芯钻头,实现了对孔底直径相对较大的岩芯进行孔底截断的取芯,改变了以往的钻取工艺。(A novel core bit relates to the technical field of drilling equipment and comprises a bit body, wherein a lifting mechanism is arranged at the upper part of the bit body, and a cutting core-taking mechanism is arranged at the lower part of the bit body; the drill bit body comprises an outer cylinder and an inner cylinder which are mutually sleeved, and the inner cylinder and the outer cylinder realize synchronous rotation through an axial torque transmission mechanism; a torque transmission sleeve is arranged in the middle of the upper part of the outer cylinder; the cutting core-taking mechanism comprises a rotating ring which is hung and sleeved at the lower part of the inner cylinder; the side wall of the rotating ring is symmetrically provided with a cutting mechanism; the cutting mechanism is a link mechanism consisting of a pull rod, a push rod and a cutter head; the pull rod and the push rod are arc rods which are matched with the radian of the side wall of the rotating ring; two groups of steel wire rope torsion mechanisms are arranged on the drill bit body; the novel core drill bit has reasonable and reliable structural design, greatly reduces the labor intensity, improves the drilling efficiency, realizes the core taking of the core with the hole bottom diameter being relatively larger by cutting the hole bottom, and changes the prior drilling process.)
1. A novel coring bit is characterized in that: the core cutting and taking mechanism is arranged at the lower part of the drill bit body, and a cutter rotates inwards to cut a core;
the drill bit body comprises an outer cylinder and an inner cylinder which are mutually sleeved, and the inner cylinder and the outer cylinder realize synchronous rotation through an axial torque transmission mechanism; a torque transmission sleeve which is used for connecting the drill rod and transmitting torque is arranged in the middle of the upper part of the outer cylinder; the lifting mechanism is arranged on the outer barrel;
the cutting core-taking mechanism comprises a rotating ring arranged below the inner cylinder, wherein a circle of annular convex edge is arranged on the outer peripheral wall of the lower part of the inner cylinder, a circle of annular groove matched with the annular convex edge is arranged on the inner side wall of the upper part of the rotating ring, and the rotating ring is hung and sleeved on the lower part of the inner cylinder through the matching of the annular groove and the annular convex edge; two cutting window holes are symmetrically formed in the side wall of the rotating ring, and cutting mechanisms are respectively arranged in the cutting window holes;
the cutting mechanism comprises a pull rod hinged with the inner cylinder and a push rod hinged with the rotating ring, the other end of the push rod is hinged with a cutting tool bit, a cutting edge of the cutting tool bit is arranged towards one side of the circle center of the rotating ring, the other end of the pull rod is hinged with the push rod at a position close to the cutting tool bit, and the pull rod, the push rod and the tool bit form a link mechanism; the pull rod and the push rod are arc-shaped rods which are matched with the radian of the side wall of the rotating ring;
two groups of steel wire rope torsion mechanisms are symmetrically arranged, wherein the outer cylinder moves up and down along the inner cylinder to drive the rotating ring to rotate;
the steel wire rope twisting mechanism comprises a steel wire rope; two guide seats are symmetrically arranged on the outer side wall above the annular convex edge of the inner cylinder, a tension wheel corresponding to one of the guide seats is arranged at the top of the outer cylinder, and a winding mechanism for changing the stress direction of the steel wire rope is arranged between the inner cylinder and the outer cylinder above the other guide seat; the winding mechanism comprises a winding seat arranged on the outer side wall of the inner barrel and a fixing mechanism which is arranged on the inner side wall of the outer barrel and is positioned below the winding seat and used for fixing the steel wire rope; the steel wire rope led out by the fixing mechanism winds up the winding seat, then passes through the two guide seats downwards, then passes through the gap between the inner cylinder and the outer cylinder upwards, and finally is connected with the tension wheel; the steel wire rope between the two guide seats is fixedly connected with the rotating ring through a rope clamping device.
2. The novel core bit as set forth in claim 1, wherein: the lifting mechanism comprises reinforcing rib plates symmetrically arranged on two sides of the torque transmission sleeve, the upper end face of the outer cylinder and the outer circumferential face of the torque transmission sleeve are fixedly connected through the reinforcing rib plates, and two lifting holes symmetrically arranged are formed in the two reinforcing rib plates.
3. The novel core bit as set forth in claim 1, wherein: the rope clamping device is provided with a rope groove, and a steel wire rope between the two guide seats is arranged in the rope groove in a penetrating mode.
4. The novel core bit as set forth in claim 1, wherein: the fixing mechanism comprises a wedge-shaped hole which is arranged on the lower end part of the inner wall of the outer barrel and is vertically arranged from top to bottom, a wedge-shaped block matched with the wedge-shaped hole is arranged in the wedge-shaped hole, and the steel wire rope is fixedly arranged in the wedge-shaped hole by bypassing the wedge-shaped block.
5. The novel core bit as set forth in claim 1, wherein: the axial torque transmission mechanism comprises a key groove vertically arranged on the outer wall of the inner barrel and a torque transmission key inserted in the key groove, and the inner barrel and the outer barrel are sleeved with the torque transmission key through the key groove in an inserting mode.
Technical Field
The invention relates to the technical field of drilling equipment, in particular to a novel core bit.
Background
With the demand of production development, drilling machines are widely applied to various engineering construction fields. Due to the difference of drilling materials and use environments, people develop a plurality of drilling machines of different types aiming at different use conditions, in the field of engineering drilling, when large-diameter rock-socketed drilling is met, methods such as manual hole digging, percussion drilling hole forming, rotary drilling machine drilling hole forming, full-face reverse circulation drilling machine drilling hole forming and the like can be adopted, along with the rise of labor cost, the improvement of safety requirements and the increasing requirements of drilling efficiency, and the mainstream methods adopted in the industry for large-diameter rock-socketed drilling are two hole forming methods of full-face reverse circulation drilling machine drilling hole forming and rotary drilling machine drilling hole forming.
The full-face reverse circulation drilling machine mainly adopts a full-face crushing method during drilling, drilling slag is carried out with holes by using circulation of drilling fluid, full-face drilling is relatively low in drilling efficiency because the rock breaking amount is 100% of the volume of a drilled hole, more importantly, when the diameter of the drilled hole is large and the hardness of the rock is large, sufficient drilling pressure required by effective rock breaking cannot be applied to the hole bottom in the existing visible formed product, so that the drilling efficiency is very low, and only a few centimeters can be drilled in one hour.
When the rotary drilling rig drills into a hole, the telescopic drill rod is mainly used, the telescopic drill rod is used, so that the drilling is convenient to carry out, therefore, when the rotary drilling rig is used for large-diameter rock-socketed drilling, the core drilling method is generally adopted at present, and the drilling teeth on the core drilling bit can be cutting teeth or gear cones. Core drilling not only reduces the amount of broken rocks, more importantly, when large-diameter socketed rock drilling is carried out, core drilling is carried out because the broken area of the broken rocks is small relatively, so that the rotary drilling rig can apply the drilling pressure required by effective broken rocks to the bottom of a hole, and further the drilling efficiency is improved. However, when the diameter of the drilled hole is large and the rock is hard and complete, the diameter of the core left in the hole is still large even after the annular crushing is completed, and how to cut off the core left at the bottom of the hole becomes a very important problem.
Those skilled in the art have also tested and are using methods such as: 1. after the core is forcibly clamped by a drill bit with a relatively small inner drift diameter, the core is lifted off or twisted off; 2. laterally crushing the core by adopting a method of adding a wedge iron at the upper end inside the drill bit barrel; 3. a device with hydraulic power is put into the bottom of the hole to laterally break the rock core; 4. and secondarily crushing the rock core by using the full-face drill bit. These methods are all available, but all have limitations, the first three methods can only process the core with relatively small diameter, in the current visible case, the maximum processing success is the drill hole with the diameter within 1500mm (of course, the hardness of the rock, the slenderness ratio of the core and the integrity of the core are also greatly determined), and the method of secondarily breaking the core by using the full-face drill bit almost loses the significance of core drilling.
Based on this, there is a strong need in the industry for a core drill bit that can bottom-hole cut a relatively large diameter core at the bottom of the hole.
Disclosure of Invention
The invention aims to solve the technical problem that aiming at the defects of the prior art, the invention provides the novel core bit which has reasonable and reliable structural design, greatly reduces the labor intensity and improves the drilling efficiency, realizes the core taking of the core with the relatively larger hole bottom diameter by cutting the hole bottom, and changes the prior drilling process.
The technical problem to be solved by the invention is realized by the following technical scheme, and the novel core taking drill bit is characterized by comprising a drill bit body, wherein the upper part of the drill bit body is provided with a lifting mechanism, and the lower part of the drill bit body is provided with a cutting core taking mechanism for cutting a core by inwards rotating a cutter;
the drill bit body comprises an outer cylinder and an inner cylinder which are mutually sleeved, and the inner cylinder and the outer cylinder realize synchronous rotation through an axial torque transmission mechanism; a torque transmission sleeve which is used for connecting the drill rod and transmitting torque is arranged in the middle of the upper part of the outer cylinder; the lifting mechanism is arranged on the outer barrel;
the cutting core-taking mechanism comprises a rotating ring arranged below the inner cylinder, wherein a circle of annular convex edge is arranged on the outer peripheral wall of the lower part of the inner cylinder, a circle of annular groove matched with the annular convex edge is arranged on the inner side wall of the upper part of the rotating ring, and the rotating ring is hung and sleeved on the lower part of the inner cylinder through the matching of the annular groove and the annular convex edge; two cutting window holes are symmetrically formed in the side wall of the rotating ring, and cutting mechanisms are respectively arranged in the cutting window holes;
the cutting mechanism comprises a pull rod hinged with the inner cylinder and a push rod hinged with the rotating ring, the other end of the push rod is hinged with a cutting tool bit, a cutting edge of the cutting tool bit is arranged towards one side of the circle center of the rotating ring, the other end of the pull rod is hinged with the push rod at a position close to the cutting tool bit, and the pull rod, the push rod and the tool bit form a link mechanism; the pull rod and the push rod are arc-shaped rods which are matched with the radian of the side wall of the rotating ring;
two groups of steel wire rope torsion mechanisms are symmetrically arranged, wherein the outer cylinder moves up and down along the inner cylinder to drive the rotating ring to rotate;
the steel wire rope twisting mechanism comprises a steel wire rope; two guide seats are symmetrically arranged on the outer side wall above the annular convex edge of the inner cylinder, a tension wheel corresponding to one of the guide seats is arranged at the top of the outer cylinder, and a winding mechanism for changing the stress direction of the steel wire rope is arranged between the inner cylinder and the outer cylinder above the other guide seat; the winding mechanism comprises a winding seat arranged on the outer side wall of the inner barrel and a fixing mechanism which is arranged on the inner side wall of the outer barrel and is positioned below the winding seat and used for fixing the steel wire rope; the steel wire rope led out by the fixing mechanism winds up the winding seat, then passes through the two guide seats downwards, then passes through the gap between the inner cylinder and the outer cylinder upwards, and finally is connected with the tension wheel; the steel wire rope between the two guide seats is fixedly connected with the rotating ring through a rope clamping device.
The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein the novel core bit comprises: the lifting mechanism comprises reinforcing rib plates symmetrically arranged on two sides of the torque transmission sleeve, the upper end face of the outer cylinder and the outer circumferential face of the torque transmission sleeve are fixedly connected through the reinforcing rib plates, and two lifting holes symmetrically arranged are formed in the two reinforcing rib plates.
The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein the novel core bit comprises: the rope clamping device is provided with a rope groove, and a steel wire rope between the two guide seats is arranged in the rope groove in a penetrating mode.
The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein the novel core bit comprises: the fixing mechanism comprises a wedge-shaped hole which is arranged on the lower end part of the inner wall of the outer barrel and is vertically arranged from top to bottom, a wedge-shaped block matched with the wedge-shaped hole is arranged in the wedge-shaped hole, and the steel wire rope is fixedly arranged in the wedge-shaped hole by bypassing the wedge-shaped block.
The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein the novel core bit comprises: the axial torque transmission mechanism comprises a key groove vertically arranged on the outer wall of the inner barrel and a torque transmission key inserted in the key groove, and the inner barrel and the outer barrel are sleeved with the torque transmission key through the key groove in an inserting mode.
Compared with the prior art, the invention has the beneficial effects that:
by arranging the cutting mechanism, the rotation of the swivel and the extension of the cutter head are designed to be linked through a connecting rod mechanism, the change of the power direction is ingeniously realized, and the difficulty of cutting off and coring the core at the bottom of the hole is overcome; the pull rod and the push rod are arranged to be arc-shaped rods which are matched with the radian of the side wall of the rotating ring, so that the pull rod and the push rod can be conveniently accommodated in a cutting window hole of the rotating ring, the space is saved, and the working environment of the bottom of the hole can be adapted;
by arranging the steel wire rope torsion mechanism, the outer barrel is pressed downwards, the steel wire rope bears force and twists the rotating ring, the rotating ring drives the connecting rod mechanism consisting of the pull rod, the push rod and the cutter heads, the cutter heads on two sides are unfolded towards the circle center of the rotating ring, and the core is cut to realize core breaking; the core drill bit is simple in structure, ingenious in design, reasonable and reliable, and capable of conducting core taking with hole bottom cut-off on a core with a hole bottom diameter being relatively large, the original drilling process is changed, labor intensity is greatly reduced, and drilling efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of the cutting mechanism;
FIG. 4 is a steel wire rope walking diagram;
fig. 5 is a schematic structural view of the fixing mechanism.
In the figure: 1. the steel wire rope tensioning device comprises an outer cylinder, 2 an inner cylinder, 3 a torque transmission sleeve, 4 a rotating ring, 5 a cutting window hole, 6 a pull rod, 7 a push rod, 8 a cutting tool bit, 9 a steel wire rope, 10 a guide seat, 11 a tensioning wheel, 12 a winding mechanism, 13 a fixing mechanism, 14 a reinforcing rib plate, 15 a lifting hole, 16 a rope clamping device, 17 a wedge-shaped hole and 18 a wedge-shaped block.
Detailed Description
The following further describes particular embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
[ example 1 ]
Referring to fig. 1 and fig. 2, a novel core drill bit comprises a bit body, wherein a lifting mechanism is arranged at the upper part of the bit body, and a core cutting and taking mechanism for cutting a core by a cutter rotating inwards is arranged at the lower part of the bit body;
the drill bit body comprises an
the cutting core-taking mechanism comprises a
referring to fig. 3, the cutting mechanism comprises a pull rod 6 hinged with the
The drill bit body is provided with two groups of
referring to fig. 4, the
The lifting mechanism comprises reinforcing
The
Referring to fig. 5, the
The axial torque transmission mechanism comprises a key groove vertically arranged on the outer wall of the
A mounting seat of a
One of them drilling rod of this drill bit top joinable is an interior locking drill rod, and this interior locking drill rod is equipped with the biography with the link of drill bit and turns round external splines, sees the chinese patent application file that application number is 2019207066648 in detail, the biography is turned round the fixed biography of being equipped with the biography of interior locking drill rod of cover 3 and is turned round internal splines, and interior locking drill rod is through the cooperation with biography commentaries on classics cover 3 and to this core bit transmission moment of torsion.
The working principle is as follows:
the present core drill bit provides torque through the drill stem of an external drilling rig, such as the inner locking drill stem described above. Two ends of a
When drilling, when the drill bit is upwards seen from the bottom of the drill bit, the drill rod drives the
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