CN112227975B - Double-connection drill rod imitating animal tendon-bone structure - Google Patents
Double-connection drill rod imitating animal tendon-bone structure Download PDFInfo
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- CN112227975B CN112227975B CN202011055770.8A CN202011055770A CN112227975B CN 112227975 B CN112227975 B CN 112227975B CN 202011055770 A CN202011055770 A CN 202011055770A CN 112227975 B CN112227975 B CN 112227975B
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- 241001465754 Metazoa Species 0.000 title claims abstract description 23
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 17
- 210000002435 tendon Anatomy 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims description 31
- 238000003466 welding Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 3
- 238000010276 construction Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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Abstract
The invention discloses a double-connection drill rod imitating an animal tendon-bone structure, which comprises a rod body, a male joint and a female joint at two ends of the rod body and a tendon rod; the female joint inner taper thread can be screwed on the male joint outer taper thread of the adjacent drill rod; the rib rod is arranged in the central through hole of the male connector and the central through hole of the female connector, and two ends of the rib rod can be respectively limited with the inner wall of the male connector and the inner wall of the female connector; when the male connector is connected with the female connector and the inner tapered threads and the outer tapered threads start to be screwed, the outer straight threads at the threaded end of the rib rod are screwed with the inner straight threads of the A female connector or the B male connector and then separated; the external taper thread of the male joint and the internal taper thread of the female joint form a bone connecting pair, and the external straight thread of the thread end and the internal straight thread of the A female joint or the B male joint form a tendon connecting pair, so that tendon-bone double connection between two adjacent drill rods is realized. The invention introduces the animal tendon-bone structure into the design of the drill rod, realizes the connection function of the tendon connection pair after the fracture of the bone connection pair, and improves the connection reliability.
Description
Technical Field
The invention belongs to the technical field of drill rods for underground tunnel drilling construction of coal mines, and particularly relates to a double-connection drill rod with an animal tendon-bone-like structure.
Background
The coal resources in China are widely distributed, the mining conditions are more and more complex along with the increase of the mining depth of coal mines, and dynamic disasters such as gas, water damage, rock burst and the like in the coal seam must be controlled before mining. The drilling technology is the most important technical means for solving disasters such as gas extraction, water exploration and drainage, rock burst, geological abnormal body detection and the like. The performance of the drill rod, which is one of the necessary drilling tools for drilling construction, is a major factor that restricts the smooth development of drilling construction. With the increase of the drilling depth, the requirement on the mechanical property of the drill rod is higher and higher; at present, the connection form of the mining drill rod mainly comprises a threaded connection type structure and a plug-in type structure, the threaded connection is not limited by a through hole structure of a gyrator of the drilling machine, the connection is convenient and fast, the drill rod can be conveniently dismounted on the drilling machine, and the connection form is widely adopted by coal mine enterprises.
The underground construction of the coal mine is mostly near horizontal drilling, the external and internal loads borne by the drill rod during working are complex, the drilling process is not only subjected to torsion, axial tension, pressure and centrifugal force generated by the torsion of the drilling machine, but also is subjected to bending stress generated by the self-weight of the drill rod and the bending composite action of the drilling track, the drilling accident is caused to occur at the joint of the male joint and the female joint, particularly, the root position of the external thread of the male joint is broken, the drilling construction period is seriously influenced, and the mine is subjected to huge economic loss.
For solving the problem of falling the brill that the drilling rod fracture leads to, different scholars have provided different solutions thinking, mainly include three aspect: firstly, a high-performance drill rod joint material is researched, and the overall toughness of a drill rod is improved from the material; secondly, optimizing the processing technology, and improving the strength and the surface quality of the joint thread through the technologies of tempering, nitriding, phosphorizing or shot blasting and the like; and thirdly, the thread tooth form structure is optimally designed, the circular arc transition of the tooth bottom is increased, the stress of each tooth of the thread is uniform, and the stress concentration is reduced, so that the torsion resistance, the bending resistance and the like of the thread of the drill rod joint are improved. Although the strength of the drill rod joint can be improved to a certain degree by adopting the method, the drill rod joint is limited by uncertainty of stratum conditions and drilling tracks along with the continuous increase of the drilling depth, the fracture of the drill rod in the using process has great randomness and uncertainty, and the problem of drill drop caused by the fracture of the drill rod is still not effectively solved.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides the double-connection drill rod imitating the animal tendon-bone structure, when a bone connection pair fails, the tendon connection pair is still effective, the effect of breaking the bone and connecting the tendon is realized, and the broken drill rod can still be smoothly lifted out of the hole.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-connection drill rod simulating an animal tendon-bone structure comprises a rod body, a male joint A, a female joint A and a tendon rod, wherein the male joint A and the female joint A are arranged at two ends of the rod body;
the male connector A comprises a male connector body A and a male connector central through hole A; the outer wall of the male joint body A is sequentially provided with a first cylindrical outer wall, a first outer shoulder, a first conical outer wall and a first end face, and the inner wall of the male joint body A is sequentially provided with a first arc-shaped inner wall, a first cylindrical inner wall, a first inner shoulder and a second cylindrical inner wall; the first conical outer wall is of an outer conical thread structure, and arc transition is arranged at the thread crest and the thread root of the first conical outer wall so as to reduce stress concentration at the thread root; the diameter of the first cylindrical inner wall is larger than that of the second cylindrical inner wall;
the A female joint comprises an A female joint body and an A female joint central through hole; the outer wall of the female joint body A is cylindrical, and the inner wall of the female joint body A sequentially comprises a first conical inner wall, a second inner circular bead, a third cylindrical inner wall and a second arc-shaped inner wall; the first conical inner wall is of an inner conical thread structure, and the third cylindrical inner wall is of an inner straight thread structure;
the rib rod comprises a rib rod body and a rib rod inner through hole; the through hole in the rib rod is coaxial with the central through hole of the male connector A and the central through hole of the female connector A; the rib rod body comprises a cylindrical thin-wall pipe, and cylindrical bosses and threaded ends which are arranged at two ends of the outer wall of the thin-wall pipe; the outer diameter of the boss is larger than that of the thin-wall pipe, the width L of the end face of the boss close to the thin-wall pipe is 2-3 times of the thickness of the thin-wall pipe, and the tensile strength of the thin-wall pipe is not lower than 2 times of the rated pull-up force T of the drilling machine; the threaded end is an external straight thread;
the first conical inner wall of the female joint A can be screwed on the first conical outer wall of the male joint A of the adjacent drill rod; the rib rod is arranged in the central through hole of the male connector A and the central through hole of the female connector A, the boss can be tightly attached to and fixed on the first columnar inner wall, the end face of the boss can be tightly attached to the first inner shoulder for limiting, and the threaded end can be screwed with the third columnar inner wall; when the male connector A is connected with the female connector A, the first conical outer wall and the first conical inner wall start to be screwed through the threads, and the threaded end is screwed with the third cylindrical inner wall and then separated; the outer taper thread of the male joint A and the inner taper thread of the female joint A form a bone connection pair, and the outer straight thread of the thread end and the inner straight thread of the third cylindrical inner wall form a rib connection pair, so that rib-bone double connection between two adjacent drill rods is realized.
The invention also comprises the following technical characteristics:
specifically, the thread parameters of the external taper thread of the male joint A and the internal taper thread of the female joint A are consistent; and the thread parameters of the external straight thread of the threaded end are consistent with those of the internal straight thread of the third cylindrical inner wall.
Specifically, the thread form of the outer straight thread at the thread end of the rib rod body is a trapezoidal thread, the number of the thread teeth is 2, the thread height is 1.5-2mm, the helix angle is 1-2.5 degrees, and the width b of a single thread root is 1.1T/50 and the unit mm.
Specifically, after the male joint A and the female joint A are connected and mounted, a first outer shoulder of the male joint A is tightly attached to the end part of the female joint A, a first end surface of the male joint A is tightly attached to a second inner shoulder of the female joint A, and the diameters of the male joint A, the female joint A and the outer wall of the rod body are the same;
after the male connector A, the female connector A and the rib rod are connected and installed, the boss of the rib rod is tightly attached to the first cylindrical inner wall and fixed through welding or threads, the thin-walled tube corresponds to the second cylindrical inner wall and the third cylindrical inner wall, and the third cylindrical inner wall is located between the first end face and the threaded end.
The invention also provides a double-connection drill rod imitating the structure of an animal tendon and a bone, which comprises a rod body, a male joint B, a female joint B and a tendon rod, wherein the male joint B and the female joint B are arranged at two ends of the rod body;
the B male connector comprises a B male connector body and a B male connector central through hole; the outer wall of the B male joint body sequentially comprises a second cylindrical outer wall, a second outer shoulder, a second conical outer wall and a second end face, and the inner wall of the B male joint body sequentially comprises a third arc-shaped inner wall, a fourth cylindrical inner wall and a fifth cylindrical inner wall; the second conical outer wall is of an outer conical thread structure; the fourth cylindrical inner wall is of an inner straight thread structure;
the B female joint comprises a B female joint body and a B female joint central through hole; the outer wall of the B female joint body is cylindrical, and the inner wall of the B female joint body sequentially comprises a second conical inner wall, a third inner shoulder, a sixth cylindrical inner wall, a fourth inner shoulder, a seventh cylindrical inner wall and a fourth arc-shaped inner wall; the second conical inner wall is of an inner conical thread structure;
the through hole in the rib rod is coaxial with the central through hole of the male joint B and the central through hole of the female joint B; the second conical inner wall of the female joint B can be screwed and installed on the second conical outer wall of the male joint B of the adjacent drill rod; the rib rod is arranged in the central through hole of the male joint B and the central through hole of the female joint B, the boss can be tightly attached to and fixed on the seventh columnar inner wall, the end face of the boss can be tightly attached to and limited by the fourth inner shoulder, and the threaded end can be screwed with the fourth columnar inner wall; when the male joint B is connected with the female joint B, the second conical outer wall and the second conical inner wall start to be screwed through the threads, and the threaded end is screwed with the fourth cylindrical inner wall and then separated; the outer taper thread of the male joint B and the inner taper thread of the female joint B form a bone connecting pair, and the outer straight thread of the thread end and the inner straight thread of the fourth cylindrical inner wall form a rib connecting pair, so that rib-bone double connection between two adjacent drill rods is realized.
Specifically, the thread parameters of the external taper thread of the male joint B and the internal taper thread of the female joint B are consistent; and the thread parameters of the external straight thread of the threaded end are consistent with those of the internal straight thread of the fourth cylindrical inner wall.
Specifically, the thread form of the outer straight thread at the thread end of the rib rod body is a trapezoidal thread, the number of the thread teeth is 2, the thread height is 1.5-2mm, the helix angle is 1-2.5 degrees, and the width b of a single thread root is 1.1T/50 and the unit mm.
Specifically, after the B male joint and the B female joint are connected and installed, a second outer shoulder of the B male joint is tightly attached to the end part of the B female joint, a second end face of the B male joint is tightly attached to a third inner shoulder of the B female joint, and the diameters of the B male joint, the B female joint and the outer wall of the rod body are the same;
after the male connector B, the female connector B and the rib rod are connected and installed, the boss of the rib rod is tightly attached to the seventh cylindrical inner wall and is fixed through welding or threads, the thin-walled tube corresponds to the fourth cylindrical inner wall, the fifth cylindrical inner wall and the sixth cylindrical inner wall, and the fourth cylindrical inner wall is located between the fifth cylindrical inner wall and the threaded end.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the invention innovatively introduces the animal tendon-bone structure into the design of the drill rod, realizes the connection effect of the tendon connection pair after the fracture of the bone connection pair, improves the connection reliability, and solves the drill drop accident after the fracture of the drill rod.
2. The drill rod is simple in structure, does not need to increase auxiliary loading and unloading processes during normal drilling, is beneficial to manual loading and unloading, can realize quick loading and unloading during construction of a matched automatic drilling machine, is convenient to machine, and is suitable for batch production.
Drawings
FIG. 1 is a schematic view of an integral joint according to embodiment 1 of the present invention;
FIG. 2 is a schematic view showing the connection of (a) male connector A, (b) female connector A, (c) rib bar, and (d) male connector A, female connector A and rib bar in example 1 of the present invention;
FIG. 3 is a schematic view showing the connection of (a) a male connector B, (B) a female connector B, (c) a ribbed bar, and (d) a male connector B, a female connector B and a ribbed bar in example 2 of the present invention;
the reference numerals have the meanings given below:
1, A male connector, 2.A female connector, 3. rib rod, 4.B male connector, 5.B female connector;
101, a male connector central through hole, 102, a first cylindrical outer wall, 103, a first outer shoulder, 104, a first tapered outer wall, 105, a first end face, 106, a first arc-shaped inner wall, 107, a first cylindrical inner wall, 108, a first inner shoulder, 109, a second cylindrical inner wall;
201, A female joint central through hole, 202, first conical inner wall, 203, second inner shoulder, 204, third cylindrical inner wall, 205, second arc inner wall;
301. a through hole in the rib rod, 302, a thin-wall pipe, 303, a boss and 304, a threaded end;
401, B male connector center through hole, 402, second cylindrical outer wall, 403, second outer shoulder, 404, second conical outer wall, 405, second end face, 406, third arcuate inner wall, 407, fourth cylindrical inner wall, 408, fifth cylindrical inner wall;
501, B female joint center through hole, 502, second conical inner wall, 503, third inner shoulder, 504, sixth cylindrical inner wall, 505, fourth inner shoulder, 506, seventh cylindrical inner wall, 507, fourth arc inner wall.
The invention is described in detail below with reference to the drawings and the detailed description.
Detailed Description
Bionics is used as a cross discipline and a source of original innovation, and is more and more widely applied. The muscle and bone of the animal form the movement system, and the muscle and bone are supported by each other and have the characteristics of rigidity and flexibility. The invention designs a double-connection drill rod simulating an animal tendon-bone structure by using a biological engineering mechanics principle, realizes a bionic effect of breaking the connection between bones and tendons, and solves the problem of drill drop caused by fracture of the drill rod.
The present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention fall within the protection scope of the present invention. The present invention will be described in further detail with reference to examples.
Example 1:
as shown in fig. 1 and 2, the present embodiment provides a dual-connection drill rod simulating an animal tendon-bone structure, which includes a rod body, a male joint 1 and a female joint 2 at two ends of the rod body, and a tendon rod 3.
The A male connector 1 comprises an A male connector body and an A male connector central through hole 101; the outer wall of the A male connector body sequentially comprises a first cylindrical outer wall 102, a first outer shoulder 103, a first conical outer wall 104 and a first end face 105, and the inner wall of the A male connector body sequentially comprises a first arc-shaped inner wall 106, a first cylindrical inner wall 107, a first inner shoulder 108 and a second cylindrical inner wall 109; the first conical outer wall 104 is of an outer conical thread structure, and the thread crest and the thread root of the first conical outer wall are both provided with arc transitions so as to reduce stress concentration at the thread root; the diameter of the first cylindrical inner wall 107 is larger than the diameter of the second cylindrical inner wall 109.
The A female joint 2 comprises an A female joint body and an A female joint central through hole 201; the outer wall of the A female joint body is cylindrical, and the inner wall of the A female joint body is sequentially provided with a first conical inner wall 202, a second inner shoulder 203, a third cylindrical inner wall 204 and a second arc-shaped inner wall 205; the first tapered inner wall 202 has an inner tapered thread structure, and the third cylindrical inner wall 204 has an inner straight thread structure.
The rib rod 3 comprises a rib rod body and a rib rod inner through hole 301; the rib rod inner through hole 301 is coaxial with the A male connector central through hole 101 and the A female connector central through hole 201; the rib rod body comprises a cylindrical thin-wall pipe 302, cylindrical bosses 303 and threaded ends 304, wherein the cylindrical bosses 303 and the threaded ends 304 are arranged at two ends of the outer wall of the thin-wall pipe 302; the outer diameter of the boss 303 is larger than that of the thin-walled tube 302, the width L of the end face of the boss 303 close to the thin-walled tube 302 is 2-3 times of the thickness of the thin-walled tube 302, and the tensile strength of the thin-walled tube 302 is not lower than 2 times of the rated pull-up force T of the drilling machine; the threaded end 304 is externally straight threaded.
The first conical inner wall 202 of the A female joint 2 can be screwed and installed on the first conical outer wall 104 of the A male joint 1 of the adjacent drill pipe; the rib rod 3 is arranged in the central through hole 101 of the male connector A and the central through hole 201 of the female connector A, the boss 303 can be tightly attached to and fixed on the first cylindrical inner wall 107, the end face of the boss 303 can be tightly attached to and limited by the first inner shoulder 108, and the threaded end 304 can be screwed with the third cylindrical inner wall 204; when the male connector 1A is connected with the female connector 2A, the first conical outer wall 104 and the first conical inner wall 202 start to be screwed through threads, and the threaded end 304 and the third cylindrical inner wall 204 are screwed and separated; the outer taper thread of the male joint A1 and the inner taper thread of the female joint A2 form a bone connection pair, and the outer straight thread of the threaded end 304 and the inner straight thread of the third cylindrical inner wall 204 form a rib connection pair, so that rib-bone double connection between two adjacent drill rods is realized.
The thread parameters of the external taper thread of the male joint A1 are consistent with those of the internal taper thread of the female joint A2; the thread parameters of the external straight thread of the threaded end 304 and the internal straight thread of the third cylindrical inner wall 204 are identical.
In this embodiment, the thread form of the external straight thread of the threaded end 304 of the bar body is a trapezoidal thread, the number of the thread teeth is 2, the thread height is 1.5-2mm, the helix angle is 1-2.5 °, and the width b of a single thread root is 1.1T/50, unit mm.
The male connector 1A, the female connector 2A and the rib rod 3 are all formed by quenching and tempering alloy steel and then processing.
After the A male joint 1 and the A female joint 2 are connected and installed, a first outer shoulder 103 of the A male joint 1 is tightly attached to the end of the A female joint 2, a first end face 105 of the A male joint 1 is tightly attached to a second inner shoulder 203 of the A female joint 2, and the diameters of the A male joint 1, the A female joint 2 and the outer wall of the rod body are the same; after the male connector 1A, the female connector 2A and the rib rod 3 are connected and mounted, the boss 303 of the rib rod 3 is tightly attached to the first cylindrical inner wall 107 and fixed through welding or threads, the thin-walled tube 302 corresponds to the second cylindrical inner wall 109 and the third cylindrical inner wall 204, and the third cylindrical inner wall 204 is located between the first end face 105 and the threaded end 304.
The first arc-shaped inner wall 106 is of a reducing structure, the inner diameter of the large opening end of the first arc-shaped inner wall 106 is the same as the inner diameter of the rod body, and the inner diameter of the reducing end of the first arc-shaped inner wall 106 is the same as the inner diameter of the first columnar inner wall 107; the second arc-shaped inner wall 205 is of an expanding structure, the inner diameter of the small end of the second arc-shaped inner wall 205 is the same as that of the third cylindrical inner wall 204, and the inner diameter of the large end of the second arc-shaped inner wall 205 is the same as that of the rod body.
The following description is given in connection with three different working states of drill rod make-up connection, breakage and drill rod break-out separation during drilling:
when normal drilling construction carries out the operation of going up to bore: when an operator connects two drill rods, the outer straight thread of the rib rod fixed at the central through hole of the A male joint is firstly screwed into the inner straight thread of the A female joint, after the rib rod is screwed for a certain length, the outer straight thread is separated from the inner straight thread, at the moment, the outer tapered thread of the A male joint and the inner tapered thread of the A female joint start to be screwed together until the end part of the A female joint is contacted with the first outer shoulder of the A male joint and is pre-tightened, and the screwing operation is finished. As a special case of this embodiment, the double-connection drill rod of the simulated animal tendon-bone structure adopts the advanced manufacturing technology of phase butt joint, and when the external conical thread and the internal conical thread are screwed together, the external straight thread and the internal straight thread are synchronously screwed together.
When the drill rod bone connection pair is broken in the drilling process: when the drill is lifted, the rib connecting pair starts to contact, as long as the drill does not rotate reversely, the outer straight thread of the rib connecting pair cannot be separated from the inner straight thread of the A female joint, and the broken drill rod is lifted out of the hole by virtue of the connection action of the rib rod fixed in the central through hole of the A male joint.
And if the drill rod is not broken, carrying out reverse shackle operation: and (3) reversely turning and tripping the drilling machine, firstly separating the outer conical thread from the inner conical thread, and separating the outer straight thread from the inner straight thread after the outer conical thread and the inner conical thread are completely separated, so that the two drill rods are completely separated, and the function of withdrawing the drill is completed.
Example 2:
as shown in fig. 3, the present embodiment provides a dual-connection drill rod simulating an animal tendon-bone structure, which includes a rod body, a B male joint 4 and a B female joint 5 at two ends of the rod body, and a tendon rod 3.
The B male connector 4 comprises a B male connector body and a B male connector central through hole 401; the outer wall of the B male joint body sequentially comprises a second cylindrical outer wall 402, a second outer shoulder 403, a second conical outer wall 404 and a second end face 405, and the inner wall of the B male joint body sequentially comprises a third arc-shaped inner wall 406, a fourth cylindrical inner wall 407 and a fifth cylindrical inner wall 408; the second conical outer wall 404 is an outer conical thread structure; the fourth cylindrical inner wall 407 has an inner straight thread structure.
The B female joint 5 comprises a B female joint body and a B female joint central through hole 501; the outer wall of the B female joint body is cylindrical, and the inner wall of the B female joint body is sequentially provided with a second conical inner wall 502, a third inner shoulder 503, a sixth cylindrical inner wall 504, a fourth inner shoulder 505, a seventh cylindrical inner wall 506 and a fourth arc-shaped inner wall 507; the second tapered inner wall 502 is of internally tapered thread construction.
The rib rod inner through hole 301 is coaxial with the B male connector central through hole 401 and the B female connector central through hole 501; the second conical inner wall 502 of the B female joint 5 can be screwed and installed on the second conical outer wall 404 of the B male joint of the adjacent drill pipe; the rib rod 3 is arranged in the central through hole 401 of the male joint B and the central through hole 501 of the female joint B, the boss 303 can be tightly attached to and fixed on the seventh cylindrical inner wall 506, the end face of the boss 303 can be tightly attached to and limited by the fourth inner shoulder 505, and the threaded end 304 can be screwed with the fourth cylindrical inner wall 407; when the B male joint 4 is connected with the B female joint 5 and the second conical outer wall 404 and the second conical inner wall 502 start to be screwed through threads, the threaded end 304 and the fourth cylindrical inner wall 407 are screwed together and separated; the external taper thread of the B male joint 4 and the internal taper thread of the B female joint 5 form a bone connection pair, and the external straight thread of the threaded end 304 and the internal straight thread of the fourth cylindrical inner wall 407 form a tendon connection pair, so that tendon-bone double connection between two adjacent drill rods is realized.
The thread parameters of the external taper thread of the male joint 4 and the internal taper thread of the female joint 5 are consistent; the thread parameters of the outer straight thread of the threaded end 304 and the inner straight thread of the fourth cylindrical inner wall 407 are identical.
In this embodiment, the thread form of the external straight thread of the threaded end 304 of the bar body is a trapezoidal thread, the number of the thread teeth is 2, the thread height is 1.5-2mm, the helix angle is 1-2.5 °, and the width b of a single thread root is 1.1T/50, unit mm.
The B male joint 4, the B female joint 5 and the bar 3 are all formed by alloy steel quenching and tempering and then processing.
After the B male joint 4 and the B female joint 5 are connected and installed, a second outer shoulder 403 of the B male joint 4 is tightly attached to the end of the B female joint 5, a second end face 405 of the B male joint 4 is tightly attached to a third inner shoulder 503 of the B female joint 5, and the diameters of the B male joint 4, the B female joint 5 and the outer wall of the rod body are the same; after the B male connector 4, the B female connector 5 and the bar 3 are connected and installed, the boss 303 of the bar 3 is tightly attached to the seventh cylindrical inner wall 506 and fixed by welding or threads, the thin-walled tube 302 corresponds to the fourth cylindrical inner wall 407, the fifth cylindrical inner wall 408 and the sixth cylindrical inner wall 504, and the fourth cylindrical inner wall 407 is located between the fifth cylindrical inner wall 408 and the threaded end 304.
The third arc-shaped inner wall 406 is of a reducing structure, the inner diameter of the large opening end of the third arc-shaped inner wall 406 is the same as the inner diameter of the rod body, and the inner diameter of the reducing end of the third arc-shaped inner wall 406 is the same as the inner diameter of the fourth columnar inner wall 407; the fourth arc inner wall 507 is of an expanding structure, the inner diameter of the small end of the fourth arc inner wall 507 is the same as that of the seventh cylindrical inner wall 506, and the inner diameter of the large end of the fourth arc inner wall 507 is the same as that of the rod body.
The following description is given in connection with three different working states of drill rod make-up connection, breakage and drill rod break-out separation during drilling:
when normal drilling construction carries out the operation of going up to bore: when an operator connects two drill rods, the outer straight thread of the rib rod fixed in the central through hole of the female joint B is firstly screwed into the inner straight thread of the male joint B, after the rib rod is screwed for a certain length, the outer straight thread is separated from the inner straight thread, at the moment, the outer conical thread of the male joint B and the inner conical thread of the female joint B start to be screwed until the second outer shoulder is contacted with the end part of the female joint and is pre-tightened, and the screwing operation is finished. As a special case of this embodiment, the double-connection drill rod of the simulated animal tendon-bone structure adopts the advanced manufacturing technology of phase butt joint, and when the external conical thread and the internal conical thread are screwed together, the external straight thread and the internal straight thread are synchronously screwed together.
When the drill rod bone connection pair is broken in the drilling process: when the drill is lifted, the rib connecting pair starts to contact, as long as the drill does not rotate reversely, the outer straight thread and the inner straight thread of the rib connecting pair cannot be separated, and the broken drill rod is lifted out of the hole by virtue of the connection action of the rib rod fixed in the central through hole of the B female joint.
And if the drill rod is not broken, carrying out reverse shackle operation: and (3) reversely turning and tripping the drilling machine, firstly separating the outer conical threads from the inner conical threads, and after the outer conical threads and the inner conical threads are completely separated, separating the outer straight threads at the small ends of the rib rods from the inner straight threads in the inner holes of the B male connectors, so that the two drill rods are completely separated, and the drill withdrawal effect is completed.
Claims (8)
1.A double-connection drill rod imitating an animal tendon-bone structure is characterized by comprising a rod body, a male joint A (1) and a female joint A (2) at two ends of the rod body and a tendon rod (3);
the A male connector (1) comprises an A male connector body and an A male connector central through hole (101); the outer wall of the A male joint body sequentially comprises a first cylindrical outer wall (102), a first outer shoulder (103), a first conical outer wall (104) and a first end surface (105), and the inner wall of the A male joint body sequentially comprises a first arc-shaped inner wall (106), a first cylindrical inner wall (107), a first inner shoulder (108) and a second cylindrical inner wall (109); the first conical outer wall (104) is of an outer conical thread structure, and arc transition is arranged at the thread crest and the thread root of the first conical outer wall so as to reduce stress concentration at the thread root; the diameter of the first cylindrical inner wall (107) is larger than that of the second cylindrical inner wall (109);
the A female joint (2) comprises an A female joint body and an A female joint central through hole (201); the outer wall of the A female joint body is cylindrical, and the inner wall of the A female joint body is sequentially provided with a first conical inner wall (202), a second inner shoulder (203), a third cylindrical inner wall (204) and a second arc-shaped inner wall (205); the first conical inner wall (202) is of an inner-conical thread structure, and the third cylindrical inner wall (204) is of an inner-straight thread structure;
the rib rod (3) comprises a rib rod body and a rib rod inner through hole (301); the rib rod inner through hole (301) is coaxial with the A male connector central through hole (101) and the A female connector central through hole (201); the bar body comprises a cylindrical thin-wall pipe (302), cylindrical bosses (303) and threaded ends (304), wherein the cylindrical bosses and the threaded ends are arranged at two ends of the outer wall of the thin-wall pipe (302); the outer diameter of the boss (303) is larger than that of the thin-walled tube (302), the width L of the end face of the boss (303) close to the thin-walled tube (302) is 2-3 times of the thickness of the thin-walled tube (302), and the tensile strength of the thin-walled tube (302) is not lower than 2 times of the rated pullout force T of the drilling machine; the threaded end (304) is an external straight thread;
the first conical inner wall (202) of the A female joint (2) can be screwed and installed on the first conical outer wall (104) of the A male joint (1) of the adjacent drill rod; the rib rod (3) is arranged in a central through hole (101) of the male connector A and a central through hole (201) of the female connector A, the boss (303) can be tightly attached to and fixed with the first columnar inner wall (107), the end face of the boss (303) can be tightly attached to and limited by the first inner shoulder (108), and the threaded end (304) can be screwed with the third columnar inner wall (204); when the male connector (1) A is connected with the female connector (2) A, the first conical outer wall (104) and the first conical inner wall (202) start to be screwed through threads, and the threaded end (304) and the third cylindrical inner wall (204) are screwed together and then separated; the outer taper thread of the male joint (1) and the inner taper thread of the female joint (2) form a bone connection pair, and the outer straight thread of the threaded end (304) and the inner straight thread of the third cylindrical inner wall (204) form a rib connection pair, so that rib-bone double connection between two adjacent drill rods is realized.
2. The dual-connection drill rod of an imitated animal tendon-bone structure according to claim 1, wherein the thread parameters of the external conical thread of the A male joint (1) and the internal conical thread of the A female joint (2) are consistent; the thread parameters of the external straight thread of the threaded end (304) and the internal straight thread of the third cylindrical inner wall (204) are consistent.
3. The dual connection drill rod of the simulated animal tendon-bone structure as claimed in claim 2, wherein the thread form of the external straight thread of the threaded end (304) of the tendon rod body is a trapezoidal thread, the number of the thread teeth is 2, the thread height is 1.5-2mm, the helix angle is 1-2.5 °, and the single root width b is 1.1T/50, unit mm.
4. The dual-connection drill rod simulating the animal tendon-bone structure as claimed in claim 1, wherein after the A male joint (1) and the A female joint (2) are connected and installed, the first outer shoulder (103) of the A male joint (1) is tightly attached to the end of the A female joint (2), the first end surface (105) of the A male joint (1) is tightly attached to the second inner shoulder (203) of the A female joint (2), and the diameters of the A male joint (1), the A female joint (2) and the outer wall of the rod body are the same;
after the A male connector (1), the A female connector (2) and the rib rod (3) are connected and installed, a boss (303) of the rib rod (3) is tightly attached to a first cylindrical inner wall (107) and fixed through welding or threads, the thin-walled tube (302) corresponds to a second cylindrical inner wall (109) and a third cylindrical inner wall (204), and the third cylindrical inner wall (204) is located between a first end face (105) and a threaded end (304).
5. A double-connection drill rod imitating an animal tendon-bone structure is characterized by comprising a rod body, a B male joint (4) and a B female joint (5) at two ends of the rod body and a tendon rod (3);
the B male connector (4) comprises a B male connector body and a B male connector central through hole (401); the outer wall of the B male joint body sequentially comprises a second cylindrical outer wall (402), a second outer shoulder (403), a second conical outer wall (404) and a second end face (405), and the inner wall of the B male joint body sequentially comprises a third arc-shaped inner wall (406), a fourth cylindrical inner wall (407) and a fifth cylindrical inner wall (408); the second conical outer wall (404) is of an outer conical thread structure; the fourth cylindrical inner wall (407) is of an inner straight thread structure;
the B female joint (5) comprises a B female joint body and a B female joint central through hole (501); the outer wall of the B female joint body is cylindrical, and the inner wall of the B female joint body is a second conical inner wall (502), a third inner shoulder (503), a sixth cylindrical inner wall (504), a fourth inner shoulder (505), a seventh cylindrical inner wall (506) and a fourth arc-shaped inner wall (507) in sequence; the second conical inner wall (502) is of an inner conical thread structure;
the rib rod (3) comprises a rib rod body and a rib rod inner through hole (301); the bar body comprises a cylindrical thin-wall pipe (302), cylindrical bosses (303) and threaded ends (304), wherein the cylindrical bosses and the threaded ends are arranged at two ends of the outer wall of the thin-wall pipe (302); the outer diameter of the boss (303) is larger than that of the thin-walled tube (302), the width L of the end face of the boss (303) close to the thin-walled tube (302) is 2-3 times of the thickness of the thin-walled tube (302), and the tensile strength of the thin-walled tube (302) is not lower than 2 times of the rated pullout force T of the drilling machine; the threaded end (304) is an external straight thread;
the rib rod inner through hole (301) is coaxial with the B male connector central through hole (401) and the B female connector central through hole (501); the second conical inner wall (502) of the B female joint (5) can be screwed and installed on the second conical outer wall (404) of the B male joint of the adjacent drill pipe; the rib rod (3) is arranged in a central through hole (401) of the male connector B and a central through hole (501) of the female connector B, the boss (303) can be tightly attached to and fixed with the seventh columnar inner wall (506), the end face of the boss (303) can be tightly attached to and limited by the fourth inner shoulder (505), and the threaded end (304) can be screwed with the fourth columnar inner wall (407); when the B male joint (4) is connected with the B female joint (5), the second conical outer wall (404) and the second conical inner wall (502) start to be screwed through threads, and the threaded end (304) and the fourth cylindrical inner wall (407) are screwed together and then separated; the outer taper thread of the male joint (4) and the inner taper thread of the female joint (5) form a bone connection pair, and the outer straight thread of the threaded end (304) and the inner straight thread of the fourth cylindrical inner wall (407) form a rib connection pair, so that rib-bone double connection between two adjacent drill rods is realized.
6. The dual connection drill rod of the simulated animal tendon-bone structure of claim 5, wherein the thread parameters of the external tapered thread of the B male joint (4) and the internal tapered thread of the B female joint (5) are consistent; the thread parameters of the external straight thread of the threaded end (304) and the internal straight thread of the fourth cylindrical inner wall (407) are consistent.
7. The dual connection drill rod of the simulated animal tendon-bone structure of claim 6, wherein the thread form of the external straight thread of the threaded end (304) of the tendon rod body is a trapezoidal thread, the number of the thread teeth is 2, the thread height is 1.5-2mm, the helix angle is 1-2.5 degrees, and the single root width b is 1.1T/50 in mm.
8. The dual-connection drill rod simulating the animal tendon-bone structure as claimed in claim 5, wherein after the B male joint (4) and the B female joint (5) are connected and installed, the second outer shoulder (403) of the B male joint (4) is tightly attached to the end of the B female joint (5), the second end surface (405) of the B male joint (4) is tightly attached to the third inner shoulder (503) of the B female joint (5), and the diameters of the B male joint (4), the B female joint (5) and the outer wall of the rod body are the same;
after the B male connector (4), the B female connector (5) and the rib rod (3) are connected and installed, a boss (303) of the rib rod (3) is tightly attached to a seventh cylindrical inner wall (506) and fixed through welding or threads, the thin-walled tube (302) corresponds to a fourth cylindrical inner wall (407), a fifth cylindrical inner wall (408) and a sixth cylindrical inner wall (504), and the fourth cylindrical inner wall (407) is located between the fifth cylindrical inner wall (408) and the threaded end (304).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011055770.8A CN112227975B (en) | 2020-09-29 | 2020-09-29 | Double-connection drill rod imitating animal tendon-bone structure |
| AU2021355576A AU2021355576A1 (en) | 2020-09-29 | 2021-08-02 | Dual-connection drill rod imitating animal rib-bone structure |
| PCT/CN2021/110024 WO2022068374A1 (en) | 2020-09-29 | 2021-08-02 | Dual-connection drill rod imitating animal rib-bone structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011055770.8A CN112227975B (en) | 2020-09-29 | 2020-09-29 | Double-connection drill rod imitating animal tendon-bone structure |
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| Publication Number | Publication Date |
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| CN112227975A CN112227975A (en) | 2021-01-15 |
| CN112227975B true CN112227975B (en) | 2022-03-15 |
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| CN202011055770.8A Active CN112227975B (en) | 2020-09-29 | 2020-09-29 | Double-connection drill rod imitating animal tendon-bone structure |
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| Country | Link |
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| CN (1) | CN112227975B (en) |
| AU (1) | AU2021355576A1 (en) |
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| CN112227975B (en) * | 2020-09-29 | 2022-03-15 | 中煤科工集团西安研究院有限公司 | Double-connection drill rod imitating animal tendon-bone structure |
| CN113700441B (en) * | 2021-11-01 | 2021-12-31 | 中煤科工集团西安研究院有限公司 | Mining drill rod male joint with fracture self-locking function and drill rod |
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| Publication number | Publication date |
|---|---|
| AU2021355576A1 (en) | 2023-06-01 |
| WO2022068374A1 (en) | 2022-04-07 |
| CN112227975A (en) | 2021-01-15 |
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