CN112576203B - Self-locking drilling rod capable of rotating positively and negatively - Google Patents
Self-locking drilling rod capable of rotating positively and negatively Download PDFInfo
- Publication number
- CN112576203B CN112576203B CN202011114202.0A CN202011114202A CN112576203B CN 112576203 B CN112576203 B CN 112576203B CN 202011114202 A CN202011114202 A CN 202011114202A CN 112576203 B CN112576203 B CN 112576203B
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- sliding sleeve
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- male connector
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- 238000005553 drilling Methods 0.000 title claims abstract description 27
- 230000002441 reversible effect Effects 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 9
- 238000010408 sweeping Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000000149 penetrating effect Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 4
- 239000002173 cutting fluid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002829 reductive effect Effects 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
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011799 hole material Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding 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
- E21B17/043—Threaded with locking means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- 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 discloses a self-locking type reversible drill rod, which comprises a rod body, a male connector, a female connector, a mandrel and a sliding sleeve, wherein the mandrel is sleeved in the rod body and provided with a driving force for axially sliding backwards; according to the invention, through the matching relation between adjacent drill rods, automatic locking and unlocking of drilling and automatic unlocking of drilling can be realized, and forward and reverse alternate rotation and reciprocating hole sweeping can be realized to enhance deslagging and unlocking pressure relief, so that drill sticking and drill holding are avoided; the manual auxiliary disassembly and assembly links are omitted, the mechanical automatic assembly and disassembly of the drill rod is realized, and the automatic construction efficiency of the drilling machine can be greatly improved.
Description
Technical Field
The invention relates to the technical field of mining machinery, in particular to a self-locking forward and reverse rotatable drill rod.
Background
The gas disaster is one of main disasters affecting the safe production of coal mines, and the main technical means for controlling the gas disaster is to construct gas drainage drill holes by using a drilling machine. The drill rod is used as a matched tool of a drilling machine, and is an important factor directly related to the pore-forming quality, the construction efficiency and the drainage effect.
In the current operation of the hole drilling of the drainage hole, conical threaded connection is commonly adopted between the front drill rod and the rear drill rod. Thus, during the drilling operation, the drill rod can only be rotated in the forward direction. Under the influence of complex geological conditions, if the conditions of hole collapse, unsmooth slag discharge and the like occur, accidents such as drill sticking, drill holding and the like are very easy to occur. At this time, if the drill rod is tried to be replaced and released by the forward and reverse sides of the drill rod, the drill rod is tripped, and the drill rod is lost. On the other hand, in the construction process of soft coal seam drilling and rock burst drilling, accidents such as drill sticking and the like are very easy to occur. From the drilling process perspective, the reinforced deslagging and the unclamping pressure relief can be realized through the forward and reverse alternate rotation and the reciprocating hole sweeping of the drill rod, so that the occurrence of drill sticking and holding is avoided.
In order to solve the problem of the reverse rotation of the drill rod, two main structural forms of shape connection, spline pair connection and the like are sequentially presented. The shape connection is mostly inserted and butted by adopting polygonal cylindrical surface structures such as triangular prism, hexagonal prism and the like, and is used for transmitting positive and negative bidirectional torque, and simultaneously combining with pin positioning to bear axial load of a drill rod; the spline pair is connected by adopting the fit of an inner spline and an outer spline, the circumferential torque is transmitted, and the axial load is still positioned by adopting pin connection. The connecting mode can realize forward and reverse bidirectional rotation of the drill rod, but the assembling and disassembling process is complex, the structure is complex, the pin is required to be manually installed or disassembled when the drill rod is in butt joint, 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 view of the above technical problems, there is a need for a self-locking drill rod capable of being rotated in a forward and reverse direction, which can realize automatic assembly and disassembly of the drill rod and improve the automatic construction efficiency of a drilling machine on the basis of being capable of realizing the forward and reverse rotation of the drill rod.
Disclosure of Invention
In view of the above, the invention provides a self-locking type drill rod capable of rotating forwards and backwards, which can realize automatic assembly and disassembly of the drill rod on the basis of realizing forward and reverse rotation of the drill rod, and improves the automatic construction efficiency of a drilling machine.
The self-locking type forward and backward rotatable drill rod comprises a rod body, male connectors connected to two ends of the rod body, female connectors used for being in threaded connection with the male connectors, a mandrel and a sliding sleeve, wherein the rod body, the male connectors and the female connectors form fluid channels which are mutually communicated in the axial direction and are communicated with the outside through hollow structures, the mandrel is sleeved in the rod body and is provided with a driving force for sliding in the axial direction, the sliding sleeve is sleeved on the male connectors in an axial sealing and sliding manner and is in transmission fit with the male connectors, the mandrel and the sliding sleeve are arranged in an axial linkage manner, the front end of the sliding sleeve and the rear end of the female connector are provided with meshing teeth which are mutually matched for circumferential locking, and when the male connector of a rear drill rod is in threaded connection with the female connector of a middle drill rod, the mandrel in the middle drill rod is axially pushed by the male connector of the rear drill rod to slide forwards along with the sliding sleeve in the axial direction, so that the sliding sleeve of the middle drill rod is meshed with the meshing teeth of the female connector of the front drill rod.
Further, a pair of radially through linkage holes are formed in the male connector, a linkage block radially penetrates through the pair of linkage holes, the linkage block is connected with the mandrel and the sliding sleeve, and the linkage block is axially slidably arranged in the linkage holes.
Further, guide holes matched with the outer circle of the mandrel are formed in the female connector and the male connector.
Further, an elastic piece is arranged in the female joint, and the elastic piece has an elastic force for enabling the mandrel to axially slide backwards.
Further, the female joint is internally and radially protruded inwards to form a stepped guide hole, the rear end of the mandrel is a stepped shaft with a small front part and a large rear part, the elastic piece is sleeved on the small-diameter section of the rear end of the mandrel, and the front end of the elastic piece is propped against the shaft shoulder of the guide hole, and the rear end of the elastic piece is propped against the shaft shoulder of the stepped shaft.
Further, the sliding sleeve is in spline transmission fit with the male joint.
Further, the mandrel is provided with a diversion hole which enables the cavities at the two sides of the axial direction of the guide hole to be communicated.
Further, the linkage block and the sliding sleeve form axial linkage fit through the pin.
Further, the inner circle of the sliding sleeve is sealed with the outer circle of the male connector through a sealing ring.
Further, the male connector comprises a cylindrical section connected with the rod body and a conical section connected with the cylindrical section, the conical section is a conical external threaded connector with the forward outer diameter gradually becoming smaller, and the female connector is internally provided with a conical internal threaded hole matched with the male connector conical section.
The invention has the beneficial effects that:
the invention uses screw thread to transmit forward torque and bear axial load, and transmits reverse torque through engagement of the engagement teeth; in the actual drilling process, each time a rear drill rod is added, the male head of the rear drill rod pushes the mandrel of the middle drill rod so that the engagement teeth of the middle drill rod and the front drill rod are engaged to realize mutual locking, and reverse drilling is realized; when the drill is drilled down, each time a rear drill rod is detached, the meshing teeth of the middle drill rod and the front drill rod are automatically separated and unlocked, and the drill rods can be continuously detached; the drill rod with the structure is simple in structure, easy to operate and control, automatic locking of drilling can be realized through the matching relation between adjacent drill rods, forward and reverse alternate rotation and reciprocating hole sweeping can be realized to enhance deslagging and unclamping and pressure relief, and therefore occurrence of drill clamping and drill holding is avoided; the drill rod can be automatically unlocked during tripping, the links of manual auxiliary disassembly and assembly are omitted, the mechanical automatic assembly and disassembly of the drill rod is realized, and the automatic construction efficiency of the drilling machine can be greatly improved.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of a sliding sleeve structure;
FIG. 4 is a schematic cross-sectional view of a sliding sleeve;
FIG. 5 is a schematic view of the structure of the rod body, male connector and male and female connector;
FIG. 6 is a schematic cross-sectional view of a linkage block;
FIG. 7 is a schematic view of the cross-sectional structure of A-A of FIG. 5;
FIG. 8 is a schematic axial cross-sectional view of FIG. 5;
FIG. 9 is a schematic view of a partial enlarged structure of FIG. 8;
FIG. 10 is a schematic view of the B-direction structure of FIG. 8;
FIG. 11 is a schematic diagram of a mandrel structure;
FIG. 12 is a schematic view of the matching structure of the drill rod I and the drill rod II;
FIG. 13 is a schematic view of the mating structure of drill rod II and drill rod III;
Detailed Description
As shown in the figure: the self-locking type forward and backward rotatable drill rod comprises a rod body 10, male connectors 20 connected to two ends of the rod body, female connectors 30 used for being in threaded connection with the male connectors, a mandrel 40 and a sliding sleeve 50, wherein the threaded connection of the male connectors and the female connectors means that the male connector of one drill rod is connected with the female connector of the adjacent drill rod, and the male connectors and the female connectors on the same drill rod are not in direct connection with each other; the rod body, the male connector and the female connector are hollow structures to form fluid channels which are mutually communicated in the axial direction and are communicated with the outside, the mandrel is sleeved in the rod body and is provided with driving force which axially slides backwards, the driving force can be provided by an elastic piece or driving equipment, the sliding sleeve is axially sealed and sleeved on the male connector and is in transmission fit with the male connector, the mandrel and the sliding sleeve are arranged in an axial linkage mode, the front end of the sliding sleeve and the rear end of the female connector are provided with meshing teeth which are mutually matched and used for circumferential locking, the sliding sleeve is matched with the female connector, namely the sliding sleeve of one drill rod is matched with the female connector of the adjacent drill rod, and the sliding sleeve and the female connector on the same drill rod are not in direct matching relation; when the rear drill rod male connector is in threaded connection with the middle drill rod female connector, the rear drill rod male connector axially pushes the mandrel in the middle drill rod to axially slide forwards together with the sliding sleeve, so that the sliding sleeve of the middle drill rod is meshed with the meshing teeth of the front drill rod female connector.
The backward direction is the side axially close to the female joint, the forward direction is the side axially close to the male joint, the axial linkage means that the sliding sleeve can be driven to axially slide when the mandrel axially slides, and as shown in fig. 12 and 13, a drill rod II82 is taken as an intermediate drill rod, a drill rod I81 connected to the male joint of the drill rod II is taken as a front drill rod, and a drill rod III83 connected to the female joint of the drill rod II is taken as a rear drill rod; the sliding sleeve is in transmission fit with the male connector, namely the sliding sleeve can drive the male connector to rotate when rotating, and the sliding sleeve can axially slide relative to the male connector;
referring to fig. 1 and 2, the rod body is of a tubular structure and is made of high-strength wear-resistant seamless steel tubes; the male joint and the female joint are axially provided with through runners, the male joint and the female joint are welded at two ends of the rod body through friction welding, so that a fluid channel which is axially through is formed inside the drill rod, the drill rods are mutually connected, the fluid channel is sequentially connected to form a runner which extends into a drill hole, cutting fluid and slag discharging fluid can be injected into the drill hole through the runner, the male joint is provided with an external thread section, the female joint is provided with an internal thread hole, the sliding sleeve 50 is of a sleeve type structure, the front end of the sliding sleeve is provided with a convex external tooth insert 51, the engaging teeth at the rear end of the female joint are concave internal tooth inserts 31, the two are matched to form a tooth insert type connecting structure, and the drill rod can reversely rotate and bear reverse torque through the engaging teeth of the sliding sleeve of the rear drill rod; in order to ensure reliable combination and separation between the sliding sleeve and the female joint, the width of the groove of the inner jaw 31 should be larger than that of the outer jaw 51, and the thread starting positions of the male joint and the female joint of the drill rod should be consistent, so that the jaw cannot be locked;
referring to fig. 1, 12 and 13, the front end of the male joint of the drill rod ii82 is screwed into the female joint of the drill rod i81, at this time, the sliding sleeve on the drill rod ii axially faces the female joint of the drill rod i, at this time, the mandrel in the drill rod ii is driven by the driving force and drives the sliding sleeve of the drill rod ii to axially slide after going, the sliding sleeve of the drill rod ii is far away from the female joint of the drill rod i, the meshing teeth of the sliding sleeve and the female joint are not meshed with each other, and at this time, the drill rod can only rotate forward; when the male joint of the drill rod III83 is screwed in the female joint of the drill rod II82, the male joint of the drill rod III simultaneously axially pushes the mandrel in the drill rod II to axially slide, the mandrel in the drill rod II drives the sliding sleeve shaft of the drill rod II to axially slide forwards against the driving force, the sliding sleeve of the drill rod II is meshed with the meshing teeth of the female joint of the drill rod I, at the moment, the sliding sleeve of the drill rod II is circumferentially locked with the female joint of the drill rod I to form transmission fit, and the sliding sleeve of the drill rod II is in transmission fit with the male joint of the drill rod II, so that the drill rod I and the drill rod II form transmission fit, and at the moment, the drill rod can rotate forwards and reversely;
the invention uses screw thread to transmit forward torque and bear axial load, and transmits reverse torque through engagement of the engagement teeth; in the actual drilling process, each time a rear drill rod is added, the male head of the rear drill rod pushes the mandrel of the middle drill rod so that the engagement teeth of the middle drill rod and the front drill rod are engaged to realize mutual locking, and reverse drilling is realized; when the drill is drilled down, each time a rear drill rod is detached, the meshing teeth of the middle drill rod and the front drill rod are automatically separated and unlocked, and the drill rods can be continuously detached; the drill rod of this structure simple structure, operation and control are easy, can realize boring the automatic locking through the cooperation relation between the adjacent drilling rod, can realize positive and negative rotation in turn and reciprocal sweep the hole in order to strengthen the sediment and unclamp the release to avoid the emergence of sticking, holding the brill, the drilling rod also can realize boring the automatic unblock down, has reduced the link of manual work auxiliary disassembly assembly, realizes that the drilling rod is installed and removed in mechanical automation, can improve the automatic efficiency of construction of rig greatly.
In this embodiment, the male connector is provided with a pair of radially penetrating linkage holes 23, and a pair of radially penetrating linkage blocks 61 are disposed in the linkage holes in a radially penetrating manner, and are connected with the mandrel and the sliding sleeve, and are disposed in the linkage holes in a manner of being capable of axially sliding. As shown in fig. 8, the linkage hole is formed in the cylindrical section 21 of the male connector, the two linkage holes are radially opposite, the linkage hole is in a square through hole structure, the linkage block is in a substantially cuboid structure, two ends of the linkage block are sleeved in the linkage hole, the axial dimension of the linkage hole is larger than that of the linkage block, and an axial adjustment gap with a certain distance is reserved between the two linkage holes, so that the linkage block can axially slide in the linkage hole; referring to fig. 2, the sliding sleeve is sleeved on the cylindrical section 21 of the male connector, the linkage block is located in the sliding sleeve, two ends of the linkage block are detachably connected with the inner wall of the sliding sleeve, a rectangular connection square hole 45 is radially formed at the near front end of the mandrel, the linkage block passes through the connection square hole 45 to be connected with the mandrel into a whole, of course, the linkage block can be connected with the sliding sleeve and the mandrel in a fixed connection manner or other known connection manners, and details are not repeated; through above-mentioned structure slip cap, linkage piece and dabber link as an organic wholely, and the three axial integrative motion simultaneously three synchronous rotation.
In this embodiment, guide holes adapted to the outer circle of the mandrel are formed in the female connector and the male connector. Referring to fig. 2 and 8, the conical section 22 of the male connector is of a front small and rear large stepped hole structure, the small diameter section in the conical section forms a male stepped hole I221, the large diameter section forms a male stepped hole II222, the inner diameter of the cylindrical section of the male connector is larger than that of the male stepped hole II222, the inner cavity of the cylindrical section of the male connector forms a male stepped hole iii 223, the inner diameter of the rod body is larger than that of the male stepped hole iii 223, the inner cavity of the female connector at the front end of the conical internally threaded hole 32 is of a stepped hole structure, the stepped hole is of a front small and rear large structure, the small diameter section forms a female stepped hole I33, the large diameter section forms a female stepped hole II34, in this embodiment, the inner diameters of the female stepped hole I33 and the male stepped hole II222 are the same and are matched with the outer diameter of the mandrel, the female stepped hole I33 and the male stepped hole II222 are used as guide holes, the mandrel axially slides in the guide holes, when the mandrel is in the guide holes, the mandrel is driven by the driving force to slide backward, the proximal end is positioned at the female stepped hole I33, the front end of the mandrel is positioned at the front end of the female stepped hole II, the mandrel is driven by the mandrel, the mandrel is axially to slide through the mandrel step II, and the mandrel is driven by the mandrel is axially to slide through the mandrel step hole II, and the front end of the mandrel step hole is well, and the mandrel is driven by the mandrel, and the mandrel is axially and slide through the mandrel step hole, and is positioned at the mandrel.
In this embodiment, an elastic member 70 is disposed in the female connector 30, and the elastic member has an elastic force that makes the mandrel slide axially backward. In the embodiment, the elastic piece adopts a cylindrical spiral spring, the elastic piece can also adopt other known elastic structures, the elastic piece is pretensioned and installed at the position, close to the rear end, of the mandrel, when the mandrel withdraws the outward load of the pin shaft, the mandrel can slide back to the initial position in the axial direction by means of the reset action of the elastic piece, and at the moment, the sliding sleeve between the adjacent drill rods and the meshing teeth of the female joint are separated to automatically form an unlocking state.
In this embodiment, the female connector radially protrudes inwards to form a stepped guide hole, the rear end of the mandrel is a stepped shaft with a small front end and a large rear end, the elastic piece 70 is sleeved on the small diameter section of the rear end of the mandrel, and the front end of the elastic piece abuts against the shaft shoulder of the guide hole, and the rear end of the elastic piece abuts against the shaft shoulder of the stepped shaft. As shown in fig. 2 and 11, the small-diameter section at the rear end of the mandrel is sleeved in the female head step hole I33 to form a guide, and the elastic element is positioned in the female head step hole II34, so that the structure is beneficial to the installation of the elastic element.
In this embodiment, the sliding sleeve 50 is in spline driving engagement with the male connector. Referring to fig. 2, 3 and 8, the outer circle of the cylindrical section 21 of the male joint is a stepped shaft with a small front and a large rear, the large-diameter section of the cylindrical section is provided with an external spline, the inner cavity of the sliding sleeve is in a stepped hole shape with a small front and a large rear, the large-diameter section in the inner cavity of the sliding sleeve is provided with an internal spline, the small-diameter section of the inner cavity of the sliding sleeve is axially and slidably matched with the small-diameter section of the cylindrical section 21, the linkage hole 23 is formed in the large-diameter section of the cylindrical section 21, and a certain gap is reserved for the sliding sleeve to axially move and be used for transmitting circumferential torque and axially sliding guiding through spline matching.
In this embodiment, the mandrel is provided with a diversion hole which enables the cavities on two sides of the axial direction of the guiding hole to be communicated. As shown in fig. 2 and 11, the front end of the mandrel is provided with a front threaded hole 41, the rear end of the mandrel is provided with a rear threaded hole 42, so that guiding, installation and matching are facilitated, when the mandrel 40 is installed, special tools are installed on the front threaded hole 41 and the rear threaded hole 42, the mandrel 40 is guided to be smoothly installed in the rod body 10, the front end part of the mandrel 40 is matched with the male step hole II222, and the rear end part of the mandrel 4 is matched with the female step hole II 34; the front threaded hole 41 is radially provided with a front drain hole 43 penetrating through the outer wall of the mandrel, the rear threaded hole 42 is radially provided with a rear drain hole 44 penetrating through the outer wall of the mandrel and used for guiding the cutting fluid and slag discharging fluid, the front threaded hole 41 is combined with the front drain hole 43 to serve as a front guide hole of the mandrel, and the rear threaded hole 42 is combined with the rear drain hole 44 to serve as a rear guide hole of the mandrel; when drilling construction, cutting fluid and slag discharging fluid are introduced into the rear end of the drill rod, the drill rod enters the rod body from the rear threaded hole 42 of the mandrel through the rear water discharging hole 44, flows out through the front water discharging hole 43, flows into the rear threaded hole 42 of the mandrel corresponding to the front drill rod through the front threaded hole 41, the male step hole II222 and the male step hole I221, and of course, under the premise that the length and the diameter of the mandrel allow, the straight guide holes penetrating through the front end and the rear end can be directly machined in the central axial direction of the mandrel, and the specific structure of the guide holes can be according to the improvement of the actual structural adaptation and is not described in detail.
In this embodiment, the linkage block 61 and the sliding sleeve 50 form an axial linkage fit through the pin 62. The pin 62 is made of high-strength alloy material and is used for connecting the sliding sleeve 50 and the linkage block 61, and is shown in fig. 3 and 6 in combination with fig. 2, four outer pin holes 52 are formed in the sliding sleeve, the four outer pin holes are divided into two groups and are radially opposite, two inner pin holes 63 are respectively formed in two ends of the linkage block 61, the positions of the inner pin holes and the outer pin holes are matched, and the sliding sleeve and the linkage block are connected through four pins so that axial linkage is formed between the sliding sleeve and the linkage block.
In this embodiment, the inner circle of the sliding sleeve and the outer circle of the male connector are sealed by a sealing ring 64. As shown in fig. 2 and 8, a sealing ring mounting groove i 211 and a sealing ring mounting groove ii 212 are formed in the outer circle of the cylindrical section 21 of the male connector, the two sealing ring mounting grooves are located on two axial sides of the external spline, sealing rings are mounted in the two sealing grooves, the sealing rings are made of rubber materials, sealing is formed between the outer circle of the male connector and the inner circle of the sliding sleeve through the sealing rings, and waterproof and dustproof effects are achieved.
In this embodiment, the male connector includes a cylindrical section 21 connected with the rod body and a conical section 22 connected with the cylindrical section, the conical section 22 is a conical external threaded connector with a gradually decreasing forward outer diameter, and the female connector is internally provided with a conical internal threaded hole 32 adapted to the conical section of the male connector. The conical section is used for connecting and positioning the front drill rod and the rear drill rod and can bear forward torque and axial load;
as shown in connection with fig. 12 and 13, the automatic drill-up process: the drill rod I81 is in a state of being clamped by the drill clamp holder, the drill rod II82 is used as a drill feeding drill rod, and the male joint of the drill rod II82 is screwed into the female joint of the drill rod I81 by rotating and pushing the drill rod II82, so that screwing of the drill rod I81 and the drill rod II82 is completed; then screwing the male connector of the drill rod III83 into the female connector of the drill rod II82, pushing the mandrel of the drill rod II82 to axially slide forwards by the male connector of the drill rod III83, enabling the elastic piece in the drill rod II82 to be in a compressed state, driving the sliding sleeve to move forwards by the linkage block and the pin of the drill rod II82, enabling the outer jaw on the sliding sleeve of the drill rod II82 to be embedded into the inner jaw of the female connector of the drill rod I81, and achieving circumferential locking of the drill rod I81 and the drill rod II 82; the drill rods I81 and II82 can bear reverse torque through jaw engagement, and can bear forward torque and axial stress through a conical thread structure, so that automatic drilling of the drill rods is completed.
Automatic drill unloading process: the drill rod I81 is in a state of being clamped by the drill clamp holder, the drill rod II82 serves as a drill unloading drill rod, the drill rod III83 is withdrawn through rotation, the male connector of the drill rod III83 is screwed out of the female connector of the drill rod II82, the elastic piece of the drill rod II82 drives the mandrel to reset, and the mandrel of the drill rod II82 slides backwards under the action of the elastic piece to return to the initial position. The sliding sleeve is driven to move backwards through the linkage block and the pin of the drill rod II82, so that the outer jaw on the sliding sleeve of the drill rod II82 is separated from the inner jaw of the female joint of the drill rod I81, at the moment, the drill rod I81 and the drill rod II82 are separated from a reverse rotation state, and then the male joint of the drill rod II82 is screwed out of the female joint of the drill rod I81, so that the drill rod I81 and the drill rod II82 are completely separated, and automatic drill unloading of the drill rod is completed.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (9)
1. A but from locking-type positive reversal drilling rod, its characterized in that: the device comprises a rod body, a male connector connected to two ends of the rod body, a female connector used for being in threaded connection with the male connector, a mandrel and a sliding sleeve, wherein the rod body, the male connector and the female connector form a fluid channel which is mutually communicated in the axial direction and is communicated with the outside through a hollow structure;
the male connector is provided with a pair of radially-through linkage holes, a linkage block radially penetrates through the pair of linkage holes, the linkage block is connected with the mandrel and the sliding sleeve, and the linkage block is arranged in the linkage holes in an axially-sliding mode.
2. The self-locking reversible drill rod according to claim 1, wherein: guide holes matched with the outer circle of the mandrel are formed in the female connector and the male connector.
3. The self-locking reversible drill rod according to claim 2, wherein: an elastic piece is arranged in the female joint and has an elastic force enabling the mandrel to slide backwards in the axial direction.
4. A self-locking reversible drill rod according to claim 3, wherein: the female joint is internally and radially protruded inwards to form a stepped guide hole, the rear end of the mandrel is a stepped shaft with a small front end and a large rear end, the elastic piece is sleeved on the small-diameter section of the rear end of the mandrel, and the front end of the elastic piece is propped against the shaft shoulder of the guide hole, and the rear end of the elastic piece is propped against the shaft shoulder of the stepped shaft.
5. The self-locking reversible drill rod according to claim 1, wherein: the sliding sleeve is in transmission fit with the male joint through a spline.
6. The self-locking reversible drill pipe according to claim 4, wherein: and the mandrel is provided with a diversion hole which enables the cavities at the two sides of the axial direction of the guide hole to be communicated.
7. The self-locking reversible drill pipe according to claim 5, wherein: the linkage block and the sliding sleeve form axial linkage fit through the pin.
8. The self-locking reversible drill rod according to claim 1, wherein: the inner circle of the sliding sleeve is sealed with the outer circle of the male connector through a sealing ring.
9. The self-locking reversible drill rod according to claim 1, wherein: the male connector comprises a cylindrical section connected with the rod body and a conical section connected with the cylindrical section, wherein the conical section is a conical external threaded connector with the forward outer diameter gradually becoming smaller, and a conical internal threaded hole matched with the conical section of the male connector is formed in the female connector.
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| CN202011114202.0A CN112576203B (en) | 2020-10-18 | 2020-10-18 | Self-locking drilling rod capable of rotating positively and negatively |
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| CN202011114202.0A CN112576203B (en) | 2020-10-18 | 2020-10-18 | Self-locking drilling rod capable of rotating positively and negatively |
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| CN112576203A CN112576203A (en) | 2021-03-30 |
| CN112576203B true CN112576203B (en) | 2023-06-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119753B (en) * | 2020-02-25 | 2021-08-31 | 中煤科工集团西安研究院有限公司 | Drill rod male joint, automatic plug-in type spiral drill rod and construction method of automatic plug-in type spiral drill rod |
| CN113482546B (en) * | 2021-08-19 | 2023-10-24 | 中煤科工集团重庆研究院有限公司 | Forward and reverse rotation drill rod |
| CN114151022B (en) * | 2021-11-25 | 2024-03-22 | 中国矿业大学 | Bidirectional drill rod and clamping mechanism thereof |
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| CN112576203A (en) | 2021-03-30 |
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