CN112664147B - Tooth-embedded stop type forward and reverse rotation drill rod - Google Patents
Tooth-embedded stop type forward and reverse rotation drill rod Download PDFInfo
- Publication number
- CN112664147B CN112664147B CN202011437341.7A CN202011437341A CN112664147B CN 112664147 B CN112664147 B CN 112664147B CN 202011437341 A CN202011437341 A CN 202011437341A CN 112664147 B CN112664147 B CN 112664147B
- Authority
- CN
- China
- Prior art keywords
- section
- hole
- teeth
- rod
- drill rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002441 reversible effect Effects 0.000 title claims description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 238000005553 drilling Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 230000007246 mechanism Effects 0.000 claims description 26
- NRTLIYOWLVMQBO-UHFFFAOYSA-N 5-chloro-1,3-dimethyl-N-(1,1,3-trimethyl-1,3-dihydro-2-benzofuran-4-yl)pyrazole-4-carboxamide Chemical compound C=12C(C)OC(C)(C)C2=CC=CC=1NC(=O)C=1C(C)=NN(C)C=1Cl NRTLIYOWLVMQBO-UHFFFAOYSA-N 0.000 claims description 5
- 239000003245 coal Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- E21B17/043—Threaded with locking means
-
- 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
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a jaw stop type positive and negative rotation drill rod, which belongs to the technical field of coal mine drilling and comprises a rod body, wherein the front end of the rod body is provided with a male joint, the rear end of the rod body is provided with a female joint which can be in threaded connection with the male joint, and the rod body, the male joint and the female joint are all hollow structures so as to form center holes which are axially communicated with each other; a transmission rod connected with the central hole in a sliding manner is arranged in the central hole, and a transmission pin which penetrates through a sliding groove formed in the male connector and is connected with a sliding sleeve sleeved on the male connector is arranged at the front end of the transmission rod; the front end of the sliding sleeve is provided with a plurality of jaw teeth which can be matched with the rear end of the female joint for circumferential locking, the jaw teeth comprise a long tooth and a plurality of short teeth, the meshing length of the long tooth is longer than that of the short teeth by h, and h is smaller than the thread pitch p of the male joint matched with the female joint. The invention is easy to realize the accurate meshing of the meshing teeth when the drill rods are connected by arranging the long and short teeth which are meshed gradually, thereby improving the reliability of the drill rod connection.
Description
Technical Field
The invention belongs to the technical field of coal mine drilling and relates to a jaw stop type forward and reverse rotation drill rod.
Background
In the current drilling operation of various underground engineering holes, the front drill rod and the rear drill rod are generally connected by threads. In the drilling construction process, the drill rod can only rotate in the forward direction, and can loosen when the drill rod rotates reversely. During the drilling process, accidents such as drill jamming and drill holding are very easy to happen, and at the moment, if the drill jamming and the drill holding are tried to be relieved alternately through forward and reverse rotation of the drill rod, the drill rod can be tripped, so that the drill can be lost. From the drilling process angle, the drill rod rotates in a positive and negative alternate mode and sweeps the hole in a reciprocating mode, so that enhanced slag discharging and releasing of stuck drill can be achieved, and the occurrence of stuck drill and holding drill is avoided.
In order to solve the problem of drill rod reversal, two major structural forms such as shape coupling and spline pair coupling appear in sequence. The shape connection is mostly in plug-in connection by adopting polyhedral cylindrical surface structures such as a triangular shape, a hexagonal shape and the like so as to transmit positive and negative bidirectional torque, and is positioned by combining a pin to bear the axial load of a drill rod; the spline pair is connected by adopting the matching of an inner spline and an outer spline, the circumferential torque is transmitted, and the axial load is still positioned by adopting pin connection. Although the connection mode can realize the forward and backward bidirectional rotation of the drill rod, the assembling and disassembling process is complicated, the pin needs to be assembled or disassembled manually, the assembling and disassembling are difficult to realize in an automatic mode, and the automatic construction efficiency of the drilling machine is seriously reduced.
In recent years, the technology and equipment of the coal mine automatic drilling machine are mature day by day, the application number is increased year by year, the automation degree is high, the safety is good, and the coal mine automatic drilling machine becomes the development trend of the coal mine drilling machine. In the construction process of the automatic drilling machine, if accidents such as drill holding, drill clamping and the like occur, the automatic drilling machine can automatically judge through an intelligent drill clamping prevention program, and control a related mechanism to drive a drill rod to rotate forwards and backwards, so that automatic jam releasing is realized. Therefore, a drill rod with high reliability and the functions of automatic screwing and unscrewing and forward and backward bidirectional rotation without unscrewing needs to be developed.
Disclosure of Invention
In view of this, an object of the present application is to provide a jaw stop type forward and reverse rotation drill rod to solve the problem of thread release when the drill rod rotates in both directions.
In order to achieve the purpose, the invention provides the following technical scheme:
a jaw stop type positive and negative rotation drill rod comprises a rod body, wherein a male joint is arranged at the front end of the rod body, a female joint capable of being in threaded connection with the male joint is arranged at the rear end of the rod body, and the rod body, the male joint and the female joint are all of hollow structures so as to form center holes which are axially communicated with each other; a transmission rod which is connected with the central hole in a sliding way is arranged in the central hole, and a transmission pin which penetrates through a sliding groove formed in the male connector and is connected with a sliding sleeve sleeved on the male connector is arranged at the front end of the transmission rod; the front end of the sliding sleeve is provided with a plurality of jaw teeth which can be matched with the rear end of the female joint for circumferential locking, the jaw teeth comprise a long tooth and a plurality of short teeth, the meshing length of the long tooth is longer than that of the short teeth by h, and h is smaller than the thread pitch p of the male joint matched with the female joint; when the sliding sleeve is positioned on the axial limit arranged on the male joint, two adjacent drill rods can be screwed and only a pair of long teeth are contacted, the contact length is h1, and h1 is more than 0 and is not more than h; the sliding sleeve can move from the axial limit to the front end of the male joint along the axial direction of the male joint so as to enable the embedded teeth of two adjacent drill rods to be meshed with each other.
Optionally, the rear end face of the female joint is provided with internal tooth inserts forwards along the axial direction, and the internal tooth inserts comprise a first long tooth and a plurality of short teeth; the front end face of the sliding sleeve is provided with outer tooth embedded teeth backwards along the axial direction, and the outer tooth embedded teeth comprise second long teeth and a plurality of short teeth.
Optionally, a locking mechanism capable of locking the transmission rod in a full-tooth meshing state or a state with only long tooth contact is further included.
Optionally, the locking mechanism is an elastic telescopic mechanism located in a limiting hole formed in the female joint and comprises a positioning part which can extend into a locking groove formed in the rear end of the transmission rod, and when the locking mechanism corresponds to the locking groove, the positioning part of the locking mechanism can extend into the locking groove to realize axial limiting of the transmission rod relative to the female joint; the locking groove comprises a front locking groove and a rear locking groove which are axially arranged along the transmission rod, when the sliding sleeve is positioned at the axial limiting position, the locking mechanism corresponds to the front locking groove, and when the sliding sleeve is meshed with the male connector in full teeth, the locking mechanism corresponds to the rear locking groove.
Optionally, the front locking groove and the rear locking groove are both arc-shaped cross-section grooves around the transmission rod.
Optionally, the locking mechanism includes a fixture block, an elastic element and a positioning element, the positioning element is slidably connected to one end of the limiting hole close to the central hole, the fixture block is fixed to one end of the limiting hole far away from the central hole, and the elastic element is located between the fixture block and the positioning element.
Optionally, the limiting hole is a stepped hole, the aperture of the limiting hole is sequentially increased from inside to outside along the radial direction of the female joint, the limiting hole comprises a guide section, a limiting section and a fixing section, the guide section, the limiting section and the fixing section are sequentially arranged from inside to outside along the radial direction of the female joint, the aperture of the fixing section is gradually increased, a clamping block is fixed in the fixing section, and a positioning piece is connected in the guide section in a sliding manner; the locating piece is the step shaft, including with the guide shaft section of guide section sliding fit, the one end that the guide shaft section is close to the centre bore has location portion, and the other end is equipped with spacing shaft section, and spacing shaft section is located the spacing section in spacing hole, and the diameter of the axle of spacing shaft section is greater than the guide section aperture in spacing hole.
Alternatively, when two adjacent drill rods are screwed together, the front end face of the male connector is in contact with the drive rod of the other drill rod.
Optionally, the male joint comprises a tightening section, a threaded section and a connecting section which are sequentially arranged, wherein the connecting section is fixedly connected with the rod body, an external spline matched with an internal spline arranged on the sliding sleeve is arranged in the circumferential direction of the connecting section, an external thread matched with an internal thread arranged on the female joint is arranged in the circumferential direction of the threaded section, and when two adjacent drill rod threads are screwed, the front end face of the tightening section is in contact with the rear end face of the transmission rod of another drill rod.
Optionally, the driving rod comprises a front section, a middle section and a rear section which are sequentially arranged; a front water through hole communicated with the central hole is formed in the front section, and the front water through hole comprises a front axial water hole and a front radial water hole, wherein the front axial water hole is formed inwards from the front end surface of the front section, and the front radial water hole is communicated with the front axial water hole and is radially arranged along the front section; the rear section is internally provided with a rear limber hole, and the rear limber hole comprises a rear axial water hole which is inwards arranged from the rear end surface of the rear section and a rear radial water hole which is communicated with the rear axial water hole and is radially arranged along the rear section.
Alternatively, p-h =2 to 4mm.
The invention has the beneficial effects that:
1. according to the invention, the long and short teeth which are meshed gradually are arranged, so that the meshing teeth can be meshed accurately easily when the drill rods are connected, the problem that the meshing teeth are easy to misplace when the drill rods are connected is solved, and the meshing reliability when the two drill rods are connected is further improved.
2. According to the invention, after the threads of the two drill rods are screwed, the front end surface of the male joint is contacted with the transmission rod of the other drill rod, so that the two drill rods are prevented from loosening due to vibration in the drilling process.
3. The invention realizes the function that the positive and negative bidirectional rotating threads of the threaded connection drill rod are not released; meanwhile, the locking and the loosening of the tooth embedded teeth are realized through the forward and backward translation of the simple sliding sleeve, the automatic assembly and disassembly of the reversible drill rod are facilitated, and the technical support can be provided for the automatic drilling of the underground coal mine.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a first schematic structural view (stop state) of a jaw stop type forward and reverse rotation drill rod of the present invention;
FIG. 2 is a schematic structural view of a jaw stop type forward and reverse rotation drill rod according to the present invention;
FIG. 3 is a schematic structural view of a drill rod body;
FIG. 4 is a first schematic structural view of the sliding sleeve;
FIG. 5 is a second schematic structural view of the sliding sleeve;
FIG. 6 is a schematic structural view of a positioning member;
FIG. 7 is a schematic view of the transmission rod;
FIG. 8 is a schematic view of the fully threaded, long tooth blocked condition;
FIG. 9 is a top view (of a tooth portion) of FIG. 8;
FIG. 10 is a schematic view of the completed state of the upper drill pipe (i.e., the initial state of the lower drill pipe);
fig. 11 is a top view (a portion of a tooth) of fig. 10.
Reference numerals are as follows: the drill pipe comprises a female joint 1, a rod body 2, a male joint 3, a rectangular pin 4, a sliding sleeve 5, a transmission rod 6, a positioning piece 7, an elastic piece 8, a clamping block 9, a front end drill rod 10, an upper drill rod 11, a lower drill rod 12, an inner tooth cog 101, a first long tooth 101a, a conical inner thread 102, a sliding hole 103, a limiting hole 104, a stopping shaft 301, a conical outer thread 302, a water through hole 303, a jack 304, an outer spline 305, a sliding groove 306, a shaft shoulder 307, a through hole 308, an outer tooth cog 501, an inner spline 502, a fixing hole 503, a second long tooth 501a, a front mounting section 601, a front water through hole 602, a rear mounting section 603, a rear water through hole 604, a front locking groove 605, a rear locking groove 606, a rectangular groove 607, a large end 701 and a small end 702.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 11, a jaw stop type forward and reverse rotation drill rod comprises a drill rod body, wherein the drill rod body comprises a rod body 2, a male joint 3 is arranged at the front end of the rod body 2, a female joint 1 capable of being in threaded connection with the male joint 3 is arranged at the rear end of the rod body, and the rod body 2, the male joint 3 and the female joint 1 are all hollow structures so as to form axially-through center holes; a transmission rod 6 connected with the central hole in a sliding manner is arranged in the central hole, and a transmission pin which penetrates through a sliding groove 306 formed in the male connector 3 and is connected with a sliding sleeve 5 sleeved on the male connector 3 is arranged at the front end of the transmission rod 6 so as to realize axial linkage of the transmission rod 6 and the sliding sleeve 5; the front end of the sliding sleeve 5 is provided with a plurality of embedded teeth which can be matched with the rear end of the female joint 1 for circumferential locking, the embedded teeth comprise a long tooth and a plurality of short teeth, the meshing length of the long tooth is longer than that of the short teeth by h, and h is smaller than the thread pitch p of the male joint 3 matched with the female joint 1; the male connector 3 is provided with an axial limiting position for limiting the axial moving position of the sliding sleeve 5, when the sliding sleeve 5 is located at the axial limiting position, two adjacent drill rods can be screwed tightly and only a pair of long teeth are in contact, the contact length is h1, and h1 is more than 0 and is not more than h; the sliding sleeve 5 can move from the axial limit to the front end of the male joint 3 along the axial direction of the male joint 3 so as to enable the adjacent two drill rod jaw teeth to be meshed in a full tooth mode.
The rear end face of the female joint 1 is provided with inner tooth cogs 101 along the axial direction, and the inner tooth cogs 101 comprise first long teeth 101a and a plurality of short teeth; the front end face of the sliding sleeve 5 is provided with an outer tooth insert 501 axially rearward, and the outer tooth insert 501 includes a second long tooth 501a and a plurality of short teeth.
The sliding groove 306 of the present invention may be formed on one side of the central hole, or may be symmetrically formed on both sides of the central hole, preferably on both sides. The cross-section of the driving pin may be circular or polygonal, preferably rectangular.
The invention also comprises a locking mechanism which can lock the transmission rod 6 in a full-tooth meshing state or a state with only long tooth contact. The locking mechanism can be an elastic telescopic mechanism positioned in a limiting hole 104 formed in the female joint 1 and comprises a positioning part which can stretch into a locking groove formed in the rear end of the transmission rod 6, and when the locking mechanism corresponds to the locking groove, the positioning part of the locking mechanism can automatically stretch into the locking groove to realize the axial limiting of the transmission rod 6 relative to the female joint 1; the locking grooves comprise a front locking groove 605 and a rear locking groove 606 which are axially arranged along the transmission rod 6, the front locking groove 605 and the rear locking groove 606 are the same in shape, the locking mechanism corresponds to the position of the front locking groove 605 when the sliding sleeve 5 is positioned at the axial limiting position, and the locking mechanism corresponds to the position of the rear locking groove 606 when the sliding sleeve 5 is fully engaged with the male connector 3.
The locking mechanism comprises a clamping block 9, an elastic piece 8 and a positioning piece 7, the positioning piece 7 is connected to one end, close to the central hole, of the limiting hole 104 in a sliding mode, the clamping block 9 is fixed to one end, far away from the central hole, of the limiting hole 104, and the elastic piece 8 is located between the clamping block 9 and the positioning piece 7; the elastic member 8 may be a compression spring or an elastic column.
Preferably, the front locking groove 605 and the rear locking groove 606 are both arc-shaped cross-sectional grooves around the transmission lever 6.
Preferably, the limiting hole 104 is a stepped hole, the aperture of which is sequentially increased from inside to outside along the radial direction of the female joint 1, and the limiting hole comprises a guiding section, a limiting section and a fixing section, which are sequentially arranged from inside to outside along the radial direction of the female joint and the aperture of which is gradually increased, a clamping block 9 is fixed in the fixing section, and a positioning piece 7 is slidably connected in the guiding section; the locating piece 7 is a stepped shaft and comprises a guide shaft section in sliding fit with the guide section, one end, close to the center hole, of the guide shaft section is provided with a locating portion, the other end of the guide shaft section is provided with a limiting shaft section, the limiting shaft section is located in a limiting section of the limiting hole 104, and the shaft diameter of the limiting shaft section is larger than the diameter of the guide section of the limiting hole 104.
Preferably, when two adjacent drill rods are screwed, the front end of the male connector 3 comes into contact with the transmission rod 6 of the other drill rod.
Preferably, the male connector 3 comprises a tightening section, a thread section and a connecting section which are sequentially arranged, wherein one end of the connecting section is fixedly connected with the rod body 2, an external spline 305 matched with an internal spline 502 arranged on the sliding sleeve 5 is arranged in the circumferential direction of the connecting section, an external thread matched with an internal thread arranged on the female connector 1 is arranged in the circumferential direction of the thread section, and when two adjacent drill rod threads are screwed, the front end surface of the tightening section is in contact with the rear end surface of the transmission rod 6 so as to prevent loosening caused by vibration in the drilling process.
Preferably, the transmission rod 6 comprises a front section, a middle section and a rear section which are arranged in sequence; a front water through hole 602 communicated with the central hole is formed in the front section, and the front water through hole 602 comprises a front axial water hole and a front radial water hole, wherein the front axial water hole is formed inwards from the front end surface of the front section, and the front radial water hole is communicated with the front axial water hole and is radially arranged along the front section; a rear water through hole 604 is formed in the rear section, and the rear water through hole 604 comprises a rear axial water hole formed inwards from the rear end face of the rear section and a rear radial water hole communicated with the rear axial water hole and arranged along the radial direction of the rear section.
Preferably, p-h =2 to 4mm.
The invention not only solves the problem that the existing drill rod can cause thread connection between the drill rods to be released when the drill rod rotates reversely, thereby causing drill loss, but also realizes automatic assembly and disassembly of the drill rod.
Examples
A jaw stop type forward and reverse rotation drill rod comprises a female joint 1, a rod body 2, a male joint 3, a rectangular pin 4, a sliding sleeve 5, a transmission rod 6, a positioning piece 7, an elastic piece 8 and a clamping block 9, wherein the elastic piece 8 is a spring, as shown in figures 1-11.
The female joint 1 and the male joint 3 are respectively connected with the rod body 2 in a coaxial friction welding mode to form a drill rod body. As shown in fig. 3.
(1) Female joint 1
The wall thickness of the front end of the female joint is adapted to the rod body 2 so as to ensure the proper wall thickness of the friction welding pipe. The middle section is provided with a sliding hole 103 matched with the transmission rod 6, and the hole wall of the sliding hole 103 is symmetrically provided with two stepped limiting holes 104 for installing the positioning piece 7, the spring and the fixture block 9. The rear section is a conical female thread 102 (assuming pitch p) that mates with the male connector 3. An inner tooth 101 is provided axially forward from the rear end surface of the box 1. The inner tooth insert 101 has a groove width greater than the tooth width, the inner tooth insert 101 being composed of a first long tooth 101a and several short teeth, the first long tooth 101a being longer than the other short teeth by h < p, preferably p-h = 2-4 mm).
(2) Male joint 3
The wall thickness of the rear end of the male joint 3 is adapted to the wall thickness of the rod body 2 so as to ensure the proper friction welding wall thickness. The rear section of the outer cylindrical surface is provided with a shaft shoulder 307 with a front end surface to form axial limiting, so that the sliding sleeve 5 is axially limited. The middle section is provided with an external spline 305 which is matched with an internal spline 502 of the sliding sleeve 5 to transmit the rotation torque of the drill rod. The front section of the male joint 3 is a conical external thread 302, a retaining shaft 301 is arranged in front of the external thread, and the front end face of the retaining shaft 301 can prop against the rear end face of the transmission rod 6 of the previous drill rod to prevent the transmission rod from withdrawing under the action of drilling vibration. The male connector 3 is internally provided with a through hole 308, a jack 304 and a water through hole 303 from back to front in sequence, the through hole 308 is used for passing through the transmission rod 6, the jack 304 is used for installing the transmission rod 6 and is in sliding connection with the transmission rod, the water through hole 303 is communicated with the through hole 308, a rod body inner hole and the front and back water through holes of the transmission rod to form a slag discharge water channel, and the axial sliding of the transmission rod 6 is limited by a step at the joint of the jack 304 and the water through hole 303. Two sliding grooves 306 are oppositely arranged on the wall of the through hole 308, are strip-shaped grooves along the axial direction of the drill rod and are in sliding fit with the rectangular pin 4.
(3) Sliding sleeve 5
The sliding sleeve 5 is integrally processed by a high-strength seamless thick-wall steel pipe. The smooth inner holes at the front end and the rear end are in sliding fit with the corresponding shaft sections of the male connector 3. The middle section is provided with internal splines 502 which mate with external splines 305 of the male connector 3. The front end face is provided with an outer cog 501 axially rearward matching the inner cog 101, the outer cog 501 being composed of a second long cog 501a and a plurality of short cogs.
(4) Driving pin
The driving pin is a rectangular pin 4 with a rectangular section, and four edges along the length direction are chamfered. The sliding groove 306 of the male connector 3 is penetrated, the middle part of the sliding groove is fixed in the rectangular hole of the transmission rod 6, and the two ends of the sliding groove are fixed in the fixing holes 503 of the sliding sleeve 5. The rectangular pin 4 transmits the movement between the sliding sleeve 5 and the transmission rod 6.
(5) Locking mechanism consisting of positioning piece 7, spring and clamping block 9
The positioning piece 7 is a step pin and comprises a large end 701 and a small end 702 which are sequentially arranged, the large end 701 is a limiting shaft section, the small end 702 is a guide shaft section, and the bottom of the small end 702 is a positioning part in a hemispherical head shape and is matched with a locking groove in the transmission rod 6 to limit the transmission rod 6. The transitional end surface of the small end 702 and the large end 701 is matched with the stepped surface of the limiting hole 104 of the female joint 1, so that the positioning piece 7 is prevented from falling into the drill rod. The upper end surface of the large end 701 is used for supporting the spring.
The structure of the clamping block 9 is similar to that of the positioning piece 7, the spring is extruded at the bottom of the small end of the clamping block to generate extrusion force pointing to the interior of the drill rod, and the positioning piece 7 extends out of the limiting hole 104 of the female joint 1; the large end of the positioning hole is in interference fit with the maximum diameter of the positioning hole, and the spot welding mode is combined to ensure firm installation.
The whole transmission rod 6 is of a shaft structure and comprises a front section, a middle section and a rear section which are sequentially arranged. The front section is a front mounting section 601, is inserted into the jack 304 of the male connector 3 and forms a sliding pair with the jack; the rear end is a rear mounting section 603 which is inserted into the slide hole 103 of the female connector 1 and forms a sliding pair therewith. The front mounting section 601 is provided with a front water hole 602 inside, which includes a front axial water hole opened from the front end surface inwards and a front radial water hole opened on the pipe wall of the front mounting section 601. The rear limber holes 604 are similar to the front limber holes 602. The outer cylindrical surface of the rear mounting section 603 is provided with a front locking groove 605 and a rear locking groove 606 which are arc-shaped cross-section grooves around the transmission rod 6. The radial depth of the groove matches the hemispherical head of the small end 702 of the positioning element 7. In the stopping working condition, the positioning piece 7 is clamped in the rear locking groove 606; when the working condition can be changed, the positioning piece 7 is clamped in the front locking groove 605. The rectangular slot 607 is used to mount the rectangular pin 4.
The working principle of the embodiment is as follows:
(1) Stopping principle of upper drill
1) Initial state: the front drill rod 10 is in a stop state and the upper drill rod 11 is in a rotatable state.
2) The external threads of the male joint 3 of the upper drill rod 11 are all screwed into the internal threads of the female joint 1 of the front drill rod 10, at the moment, the second long tooth 501a of the sliding sleeve 5 of the upper drill rod 11 is blocked by the first long tooth 101a of the female joint 1 of the front drill rod 10, the contact length of the two teeth is h, and the forward rotation cannot be carried out any more. Since the pitch p is greater than h and the initial positions of the contact surfaces of the two long teeth are spatially coplanar, the contact of the two long teeth necessarily occurs after the last turn of the thread, see fig. 8 and 9.
3) The sliding sleeve 5 is pushed to move forwards to enable all the jaw teeth to be meshed, the sliding sleeve 5 drives the transmission rod 6 to move forwards through the transmission pin until all the jaw teeth are meshed, and the positioning piece 7 is inserted into the rear locking groove 606. At the moment, the forward and reverse rotation can not be carried out, and the purpose of stopping is achieved. Meanwhile, the front end surface of the retaining shaft 301 of the male connector 3 of the upper drill rod 11 abuts against the rear end of the transmission rod 6 of the front drill rod 10 to prevent the release of the transmission rod from vibration during drilling, see fig. 10 and 11.
(2) Stopping principle of drilling
1) Initial state: the front drill pipe 10 and the lower drill pipe 12 are both in a stop state in which the jaw teeth are all engaged, see fig. 10 and 11.
2) The sliding sleeve 5 of the lower drill pipe 12 is pushed backward until the spacer 7 is inserted into the front locking groove 605. Only two long teeth are left in contact with each other for a contact length h, and the remaining teeth are all disengaged, see fig. 8 and 9.
3) And the lower drill rod 12 rotates reversely, and because h < p, after the lower drill rod rotates reversely for a circle, the two long teeth are not contacted any more, and the threads of the two drill rods can be loosened normally.
The invention realizes the function that the positive and negative bidirectional rotating threads of the threaded connection drill rod are not released; meanwhile, the locking and the loosening of the tooth embedded teeth are realized through the forward and backward translation of the simple sliding sleeve, the automatic assembling and disassembling of the reversible drill rod are facilitated, the technical support can be provided for the automatic drilling of the underground coal mine, and good economic benefits are achieved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a positive reverse drilling rod of jaw locking type which characterized in that: the rod body, the male connector and the female connector are all hollow structures to form center holes which are axially communicated with each other; a transmission rod connected with the central hole in a sliding manner is arranged in the central hole, and a transmission pin which penetrates through a sliding groove formed in the male connector and is connected with a sliding sleeve sleeved on the male connector is arranged at the front end of the transmission rod; the front end of the sliding sleeve is provided with a plurality of jaw teeth which can be matched with the rear end of the female joint for circumferential locking, the jaw teeth comprise a long tooth and a plurality of short teeth, the meshing length of the long tooth is longer than that of the short teeth by h, and h is smaller than the thread pitch p of the male joint matched with the female joint; when the sliding sleeve is positioned on the male joint for axial limiting, two adjacent drill rods can be screwed and only one pair of long teeth are in contact with each other, the contact length is h1, and h1 is more than 0 and less than or equal to h; the sliding sleeve can move from the axial limit to the front end of the male joint along the axial direction of the male joint so as to enable the adjacent two drill rod jaw teeth to be meshed with each other in a full tooth manner.
2. The jaw-stop forward and backward rotation drill rod as claimed in claim 1, wherein: the rear end face of the female joint is provided with inner tooth embedded teeth forwards along the axial direction, and the inner tooth embedded teeth comprise first long teeth and a plurality of short teeth; the front end face of the sliding sleeve is provided with outer tooth cogs backwards along the axial direction, and the outer tooth cogs comprise second long teeth and a plurality of short teeth.
3. The jaw-stop forward and backward rotation drill rod as claimed in claim 1, wherein: and the locking mechanism can lock the transmission rod in a full-tooth meshing state or a state with only long tooth contact.
4. The jaw stop type forward and reverse rotation drill rod as claimed in claim 3, wherein: the locking mechanism is an elastic telescopic mechanism positioned in a limiting hole formed in the female joint and comprises a positioning part which can stretch into a locking groove formed in the rear end of the transmission rod, and when the locking mechanism corresponds to the locking groove, the positioning part of the locking mechanism can stretch into the locking groove to realize the axial limiting of the transmission rod relative to the female joint; the locking groove comprises a front locking groove and a rear locking groove which are axially arranged along the transmission rod, when the sliding sleeve is positioned at the axial limiting position, the locking mechanism corresponds to the front locking groove, and when the sliding sleeve is meshed with the male connector in full teeth, the locking mechanism corresponds to the rear locking groove.
5. The jaw stop type forward and reverse rotation drill rod as claimed in claim 4, wherein: the front locking groove and the rear locking groove are arc-shaped section grooves which surround the transmission rod for a circle.
6. The jaw stop type forward and reverse rotation drill rod as claimed in claim 4, wherein: the locking mechanism comprises a clamping block, an elastic piece and a positioning piece, the positioning piece is connected to one end, close to the center hole, of the limiting hole in a sliding mode, the clamping block is fixed to one end, far away from the center hole, of the limiting hole, and the elastic piece is located between the clamping block and the positioning piece.
7. The jaw stop type forward and reverse rotation drill rod as claimed in claim 6, wherein: the limiting hole is a stepped hole, the aperture of the limiting hole is sequentially increased from inside to outside along the radial direction of the female joint, the limiting hole comprises a guide section, a limiting section and a fixing section, the guide section, the limiting section and the fixing section are sequentially arranged from inside to outside along the radial direction of the female joint, the aperture of the fixing section is gradually increased, a clamping block is fixed in the fixing section, and a positioning piece is connected in the guide section in a sliding mode; the locating piece is the step shaft, including with the guide shaft section of guide section sliding fit, the one end that the guide shaft section is close to the centre bore has location portion, and the other end is equipped with spacing shaft section, and spacing shaft section is located the spacing section in spacing hole, and the diameter of the axle of spacing shaft section is greater than the guide section aperture in spacing hole.
8. The jaw stop type forward and reverse rotation drill rod as claimed in claim 1, wherein: when two adjacent drill rods are screwed tightly, the front end surface of the male joint is contacted with the transmission rod of the other drill rod.
9. The jaw stop type forward and reverse rotation drill rod as claimed in claim 1, wherein: the male joint comprises a tightening section, a thread section and a connecting section which are sequentially arranged, wherein the connecting section is fixedly connected with the rod body, an external spline matched with an internal spline arranged on the sliding sleeve is arranged in the circumferential direction of the connecting section, an external thread matched with an internal thread arranged on the female joint is arranged in the circumferential direction of the thread section, and when two adjacent drill rod threads are screwed, the front end face of the tightening section is in contact with the rear end face of a transmission rod of another drill rod.
10. The jaw-stop forward and backward rotation drill rod as claimed in claim 1, wherein: the transmission rod comprises a front section, a middle section and a rear section which are arranged in sequence; a front water through hole communicated with the central hole is formed in the front section, and the front water through hole comprises a front axial water hole and a front radial water hole, wherein the front axial water hole is formed inwards from the front end surface of the front section, and the front radial water hole is communicated with the front axial water hole and is radially arranged along the front section; the rear section is internally provided with a rear limber hole which comprises a rear axial water hole and a rear radial water hole, wherein the rear axial water hole is formed inwards from the rear end surface of the rear section, and the rear radial water hole is communicated with the rear axial water hole and is radially arranged along the rear section.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011437341.7A CN112664147B (en) | 2020-12-07 | 2020-12-07 | Tooth-embedded stop type forward and reverse rotation drill rod |
| PCT/CN2021/094347 WO2022121237A1 (en) | 2020-12-07 | 2021-05-18 | Teeth-embedded motion-stop forward/reverse rotation drill pipe |
| AU2021277750A AU2021277750A1 (en) | 2020-12-07 | 2021-12-03 | Jaw locking type drill pipe capable of rotating clockwise and counterclockwise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011437341.7A CN112664147B (en) | 2020-12-07 | 2020-12-07 | Tooth-embedded stop type forward and reverse rotation drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112664147A CN112664147A (en) | 2021-04-16 |
| CN112664147B true CN112664147B (en) | 2022-11-25 |
Family
ID=75401937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011437341.7A Active CN112664147B (en) | 2020-12-07 | 2020-12-07 | Tooth-embedded stop type forward and reverse rotation drill rod |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112664147B (en) |
| AU (1) | AU2021277750A1 (en) |
| WO (1) | WO2022121237A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664147B (en) * | 2020-12-07 | 2022-11-25 | 中煤科工集团重庆研究院有限公司 | Tooth-embedded stop type forward and reverse rotation drill rod |
| CN113500361B (en) * | 2021-08-20 | 2022-07-08 | 中煤科工集团重庆研究院有限公司 | Machining process of reverse drill rod |
| CN114562218B (en) * | 2022-03-10 | 2023-05-02 | 中国矿业大学 | Ratchet type automatic loading and unloading forward and reverse rotation communication drill rod of coal mine drilling robot |
| CN114776233B (en) * | 2022-05-13 | 2023-10-03 | 中国矿业大学 | Drill rod device for impact-resistant drilling robot and application method of drill rod device |
| CN115447164A (en) * | 2022-08-26 | 2022-12-09 | 武汉理工大学 | Tool rod for fiber winding forming process and working method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035038A1 (en) * | 1993-12-17 | 1996-11-07 | Sandvik Ab | Threaded coupling, male and female extension members as well as a method of maintaining a threaded coupling |
| US6305723B1 (en) * | 1998-10-27 | 2001-10-23 | Grant Prideco, L.P. | Tool joint and drill pipe made therefrom |
| CN203547559U (en) * | 2013-09-25 | 2014-04-16 | 重庆艾肯机电设备有限公司 | Drill rod |
| CN207348805U (en) * | 2017-10-31 | 2018-05-11 | 中煤科工集团重庆研究院有限公司 | Plug-in type drill rod |
| CN110259391A (en) * | 2019-07-22 | 2019-09-20 | 山西天巨重工机械有限公司 | A kind of positive and negative rotation large torque transfer device |
| CN111058779A (en) * | 2020-01-19 | 2020-04-24 | 中国地质科学院勘探技术研究所 | High-torsion-resistance high-pressure-resistance sealing drill rod joint |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3660377A1 (en) * | 2010-12-01 | 2020-06-03 | Vermeer Manufacturing Company | Tapered thread configuration with improved durability |
| CN107178319B (en) * | 2016-03-10 | 2020-04-24 | 周兆弟 | Novel drilling rod assembly device |
| CN110374521B (en) * | 2019-08-07 | 2020-10-23 | 中煤科工集团重庆研究院有限公司 | Mining positive and negative rotation automatic dismounting type drill rod |
| CN112664147B (en) * | 2020-12-07 | 2022-11-25 | 中煤科工集团重庆研究院有限公司 | Tooth-embedded stop type forward and reverse rotation drill rod |
-
2020
- 2020-12-07 CN CN202011437341.7A patent/CN112664147B/en active Active
-
2021
- 2021-05-18 WO PCT/CN2021/094347 patent/WO2022121237A1/en active Application Filing
- 2021-12-03 AU AU2021277750A patent/AU2021277750A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035038A1 (en) * | 1993-12-17 | 1996-11-07 | Sandvik Ab | Threaded coupling, male and female extension members as well as a method of maintaining a threaded coupling |
| US6305723B1 (en) * | 1998-10-27 | 2001-10-23 | Grant Prideco, L.P. | Tool joint and drill pipe made therefrom |
| CN203547559U (en) * | 2013-09-25 | 2014-04-16 | 重庆艾肯机电设备有限公司 | Drill rod |
| CN207348805U (en) * | 2017-10-31 | 2018-05-11 | 中煤科工集团重庆研究院有限公司 | Plug-in type drill rod |
| CN110259391A (en) * | 2019-07-22 | 2019-09-20 | 山西天巨重工机械有限公司 | A kind of positive and negative rotation large torque transfer device |
| CN111058779A (en) * | 2020-01-19 | 2020-04-24 | 中国地质科学院勘探技术研究所 | High-torsion-resistance high-pressure-resistance sealing drill rod joint |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2021277750A1 (en) | 2022-12-08 |
| CN112664147A (en) | 2021-04-16 |
| WO2022121237A1 (en) | 2022-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112664147B (en) | Tooth-embedded stop type forward and reverse rotation drill rod | |
| CN110374521B (en) | Mining positive and negative rotation automatic dismounting type drill rod | |
| US9605491B2 (en) | Tapered thread configuration with improved durability | |
| CN112145093B (en) | Tandem control automatic loading and unloading positive and negative rotation drill rod | |
| KR20070026825A (en) | Improvements to hydraulic tensioning jacks | |
| CN112343521A (en) | Ratchet self-locking drill rod capable of rotating forwards and reversely | |
| CN111997539B (en) | Mining forward and reverse rotation full-machine loading and unloading drill rod | |
| CN214145402U (en) | Tooth-embedded stop type forward and reverse rotation drill rod | |
| CN113482547B (en) | Embedded positive and negative rotation drill rod | |
| CN215332708U (en) | Positive and negative rotation drill rod | |
| CN112576203B (en) | Self-locking drilling rod capable of rotating positively and negatively | |
| CN112576204A (en) | Ratchet type drill rod capable of rotating forwards and backwards | |
| CN112324362B (en) | Positive and negative rotation automatic detachable drill rod | |
| CN114183080A (en) | Positive and negative rotation automatic disassembly drill rod capable of transmitting large torque and operation method | |
| CN112431307B (en) | Connecting lock for prefabricated parts | |
| CN110802540B (en) | Screw rod screwing and clamping integrated device | |
| CN114151022B (en) | Bidirectional drill rod and clamping mechanism thereof | |
| CN113482546B (en) | Forward and reverse rotation drill rod | |
| CN214091750U (en) | Ratchet type drill rod assembly capable of rotating forwards and reversely | |
| CN213450220U (en) | Drilling machine power head with floatable drill rod joint | |
| CN111894480B (en) | Disassembling tool suitable for internal locking type drill rod | |
| CN115450568A (en) | Mining forward and reverse rotation drill rod and method for detaching anti-reverse rotation drill rod | |
| CN104308792A (en) | Stud tightening device | |
| CN114991682B (en) | Automatic assembling and disassembling plug-in type locking positive and negative drill rod | |
| CN114562218B (en) | Ratchet type automatic loading and unloading forward and reverse rotation communication drill rod of coal mine drilling robot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |