CN213016260U

CN213016260U - Novel coring bit

Info

Publication number: CN213016260U
Application number: CN202021180320.7U
Authority: CN
Inventors: 卢明立; 刘祥军; 刘攀军; 陈庚; 陈义俊
Original assignee: Tianming Nanjing Intelligent Equipment Technology Co ltd
Current assignee: Tianming Nanjing Intelligent Equipment Technology Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-04-20
Anticipated expiration: 2030-06-23

Abstract

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 utility model has the advantages of reasonable design reliably, great reduction intensity of labour improves the novel core bit that gets of creeping into efficiency, has realized carrying out the coring that the hole bottom cut to the relative great core of hole bottom diameter, has changed and has bored in the past and get technology.

Description

Novel coring bit

Technical Field

The utility model belongs to the technical field of the drilling equipment technique and specifically relates to a novel coring 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 utility model aims to solve the technical problem that not enough to prior art provides a structural design is reasonable reliable, great reduction intensity of labour, improves the novel core bit that gets that creeps into efficiency, has realized carrying out the coring that the hole bottom cut to the relatively great core of hole bottom diameter, has changed and has bored in the past and has got technology.

The technical problem to be solved by the utility model is realized by the following technical proposal, the utility model is a novel coring bit, which is characterized in that the novel coring bit comprises a bit body, a lifting mechanism is arranged on the upper part of the bit body, and a cutting coring mechanism for cutting a rock core by a cutter rotating inwards is arranged on 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 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 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 utility model discloses the technical problem that will solve can also further realize through following technical scheme, above the novel coring bit in: 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 utility model discloses the technical problem that will solve can also further realize through following technical scheme, above the novel coring bit in: 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 utility model discloses the technical problem that will solve can also further realize through following technical scheme, above the novel coring bit in: 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 beneficial effects of the utility model are 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 view 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 embodiments of the present invention in order 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 outer cylinder 1 and an inner cylinder 2 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 3 which is used for connecting with a drill rod and transmitting torque is arranged in the middle of the upper part of the outer cylinder 1; the lifting mechanism is arranged on the outer barrel 1;

the cutting core-taking mechanism comprises a rotary ring 4 arranged below an inner cylinder 2, wherein a circle of annular convex edge is arranged on the outer peripheral wall of the lower part of the inner cylinder 2, a circle of annular groove matched with the annular convex edge is arranged on the inner side wall of the upper part of the rotary ring 4, the rotary ring 4 is hung and sleeved on the lower part of the inner cylinder 2 through the matching of the annular groove and the annular convex edge, and the rotary ring 4 can rotate relative to the inner cylinder 2; two cutting window holes 5 are symmetrically formed in the side wall of the rotating ring 4, and cutting mechanisms are respectively arranged in the cutting window holes 5;

referring to fig. 3, the cutting mechanism comprises a pull rod 6 hinged with the inner cylinder 2 and a push rod 7 hinged with the rotary ring 4, the other end of the push rod 7 is hinged with a cutting bit 8, a cutting edge of the cutting bit 8 is arranged towards one side of the circle center of the rotary ring 4, the other end of the pull rod 6 is hinged with the push rod 7 at a position close to the cutting bit 8, and the pull rod 6, the push rod 7 and the cutting bit form a link mechanism; the pull rod 6 and the push rod 7 are both arc-shaped rods which are suitable for the radian of the side wall of the rotating ring 4; in the non-operating state, the pull rod 6, the push rod 7 and the cutter head are all accommodated in the cutting window hole 5 of the rotary ring 4.

The drill bit body is provided with two groups of steel wire rope 9 twisting mechanisms, wherein the outer cylinder 1 moves up and down along the inner cylinder 2 to drive the rotating ring 4 to rotate and are symmetrically arranged;

referring to fig. 4, the wire rope 9 twisting mechanism includes a wire rope 9; the outer side wall above the annular convex edge of the inner cylinder 2 is symmetrically provided with two guide seats 10, the top of the outer cylinder 1 is provided with a tension wheel 11 corresponding to one of the guide seats 10, and a winding mechanism 12 for changing the stress direction of the steel wire rope 9 is arranged between the inner cylinder and the outer cylinder above the other guide seat 10; the winding mechanism 12 comprises a winding seat arranged on the outer side wall of the inner barrel 2 and a fixing mechanism 13 which is arranged on the inner side wall of the outer barrel 1 and is positioned below the winding seat and used for fixing the steel wire rope 9; a steel wire rope 9 led out by a fixing mechanism 13 winds up around the winding seat, then passes through the two guide seats 10 downwards, then passes through a gap between the inner cylinder and the outer cylinder upwards, and is finally connected with a tension wheel 11; the steel wire rope 9 between the two guide seats 10 is fixedly connected with the rotating ring 4 through a rope clamp 16.

The lifting mechanism comprises reinforcing rib plates 14 symmetrically arranged at two sides of the torque transmission sleeve 3, the upper end face of the outer cylinder 1 is fixedly connected with the outer circumferential face of the torque transmission sleeve 3 through the reinforcing rib plates 14, and two lifting holes 15 symmetrically arranged are formed in the two reinforcing rib plates 14.

The rope clamping device 16 is provided with a rope groove, and the steel wire rope 9 between the two guide seats 10 is arranged in the rope groove in a penetrating mode.

Referring to fig. 5, the fixing mechanism 13 includes a wedge-shaped hole 17 vertically arranged in a vertical direction with a small top and a large bottom on the lower end portion of the inner wall of the outer cylinder 1, a wedge-shaped block 18 matched with the wedge-shaped hole 17 is arranged in the wedge-shaped hole 17, and the steel wire rope 9 is fixedly installed in the wedge-shaped hole 17 by bypassing the wedge-shaped block 18.

The axial torque transmission mechanism comprises a key groove vertically arranged on the outer wall of the inner barrel 2 and a torque transmission key inserted in the key groove, and the inner barrel 1 and the outer barrel 1 are sleeved with the torque transmission key through the key groove in an inserting mode.

A mounting seat of a tension wheel 11 is arranged above the outer barrel 1, a pin hole is formed in the mounting seat, and the tension wheel 11 is positioned and mounted with the pin hole in the outer barrel 1 through a positioning pin. The tension pulley 11 is provided with a rope threading hole, and one end of the steel wire rope 9 is inserted into the rope threading hole of the tension pulley 11 and is tightly connected through a bolt.

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 steel wire rope 9 are connected with the outer cylinder 1, and the middle of the steel wire rope 9 bypasses the inner cylinder 2 and is fixedly connected with the rotating ring 4.

When drilling, when the drill bit is upwards seen from the bottom of the drill bit, the drill rod drives the outer cylinder 1 to rotate clockwise, the inner cylinder 2 realizes equidirectional rotation through the axial torque transmission mechanism, when the drill rod downwards pressurizes the outer cylinder 1, the outer cylinder 1 downwards moves relative to the inner cylinder 2, the steel wire rope 9 is pulled out, the steel wire rope 9 between the wedge-shaped hole 17 and the winding seat is subjected to downward pulling force, the stress direction of the steel wire rope 9 is changed by the winding seat, the steel wire rope 9 between the winding seat and the guide seat 10 below the winding seat is subjected to upward pulling force, the steel wire rope 9 between the two guide seats 10 generates rightward pulling force in the main view direction of the drawing 1, the inner cylinder 2 is not moved, the steel wire rope 9 pulls the rotating ring 4 to rotate anticlockwise relative to the inner cylinder 2 in the overlooking direction of the drawing 2, and the rotating ring.

Claims

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;

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 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.