CN213450280U - Drill rod joint capable of being automatically disassembled in forward and reverse rotation - Google Patents

Abstract

The utility model discloses a positive and negative rotation can automatic dismantlement formula tool joint, including the male joint that connects on the drilling rod and the female joint that is used for with male joint threaded connection, the male joint tip is provided with bolt subassembly, bolt subassembly includes that the axial is seted up in the pinhole of male joint tip, axial slip locates the round pin axle and the elastic component in the pinhole, the elastic component has the elastic force that makes the round pin axle axial retract to the pinhole in, female joint tip is seted up with the spliced eye of round pin axle fit, set up the pressure hole that makes drilling rod inner chamber and pinhole intercommunication in the male joint, the pressure hole is used for making the fluid in the drilling rod inner chamber get into the pinhole and then drive the round pin axle outwards to slide and insert in the spliced eye; the utility model discloses a circumference locking and unblock between the adjacent drilling rod can be controlled to the fluid, but the drilling rod circumference locking realizes positive and negative rotation in turn. And the drilling machine can be unlocked circumferentially and reversely disassembled, so that the link of manual auxiliary disassembling and assembling is reduced, and the automatic construction efficiency of the drilling machine is improved.

Description

Drill rod joint capable of being automatically disassembled in forward and reverse rotation

Technical Field

The utility model relates to a mining machinery technical field, in particular to but positive reverse rotation automatic disassembly formula tool joint.

Background

Rock burst is one of main disasters affecting coal mine safety production, and pressure relief drilling is an effective method for preventing and treating rock burst. Due to the particularity of the rock burst drilling process, accidents such as drill jamming and drill embracing are easy to happen, and at the moment, the drill rod needs to be reversely rotated to realize the jam releasing.

In the current drilling operation, the joints of the front drill rod and the rear drill rod are generally connected by conical threads. Thus, during drilling operations, the drill rod can only rotate 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 jamming, drill holding and the like are easy to occur. At this time, if the drill rod is tried to be rotated forward and backward to relieve the drill clamping and the drill holding alternately, the drill rod is tripped, and the drill is lost. On the other hand, during the drilling construction process of the soft coal seam and the rock burst drilling, accidents such as drill sticking and the like are easy to happen. From the drilling process angle, the enhanced slag discharging and the releasing of stuck pressure can be realized through the positive and negative alternate rotation and the reciprocating hole sweeping of the drill rod, so that the occurrence of stuck and embracing of the drill is avoided.

In order to solve the problem of drill rod reversal, the structural forms of two large joints such as shape connection, spline pair connection and the like 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 forward and backward bidirectional rotation of the drill rod, the assembly and disassembly process is complicated, the structure is complex, pins need to be manually assembled or disassembled when the drill rods are in butt joint, the assembly and disassembly 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 drill rod joint capable of automatically disassembling in forward and reverse rotation, which can automatically assemble and disassemble a drill rod on the basis of forward and reverse rotation of the drill rod, and improve the automatic construction efficiency of a drilling machine.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a but just reversing automatic disassembly formula tool joint on can realizing the basis that the drilling rod just reverses, enough realizes the auto-control handling of drilling rod, improves the automatic efficiency of construction of rig.

The utility model discloses a just reversing can automatic dismantlement formula tool joint, including connecting the male joint on the drilling rod and being used for the female joint with male joint threaded connection, the male joint tip is provided with bolt assembly, bolt assembly includes that the axial is seted up in the pinhole of male joint tip, endwise slip locates round pin axle and the elastic component in the pinhole, the elastic component has the elastic force that makes round pin axle axial indentation to the pinhole in, female joint tip seted up with round pin axle complex spliced eye, set up the pressure hole that makes drilling rod inner chamber and pinhole intercommunication in the male joint, the pressure hole is used for making in the fluid entering pinhole of drilling rod inner chamber and then drive pin axle outwards slides and insert in the spliced eye.

Further, the pin hole axially penetrates through two axial ends of the male connector, the inner end part of the pin hole is sealed through a plug, the pin shaft is located on the axial outer side of the plug and axially seals and slides in the pin hole in a sleeved mode, the elastic piece is located between the plug and the pin shaft, and the pressure hole is communicated with a space, located between the pin shaft and the plug, in the pin hole.

Furthermore, a plurality of bolt assemblies are uniformly arranged on the end part of the male connector in the circumferential direction, a plurality of inserting holes matched with the pin shafts one by one are formed in the end part of the female connector, and a plurality of pressure holes communicated with the inserting holes are formed in the male connector.

Furthermore, the outer end part of the plug and the inner end part of the pin shaft are provided with grooves for accommodating two ends of the elastic part.

Further, hanging shafts are radially fixed in the grooves, and two ends of the elastic piece are respectively hooked on the two hanging shafts.

Furthermore, a group of threaded mounting holes are radially formed in the groove, and two ends of the hanging shaft are in threaded connection with the two threaded mounting holes.

Furthermore, the hanging shaft is of a stepped shaft structure with two large ends and a small middle part, and the two ends of the hanging shaft are provided with thread sections with external threads.

Furthermore, the plug hole is a waist-shaped hole.

Further, the male connector is of a stepped shaft structure with a small outer end and a large inner end, the small diameter section of the male connector is a tapered external thread connector with a gradually decreasing external diameter, and the bolt component is arranged at the shaft shoulder of the male connector.

Further, an annular sealing groove is formed in the outer circle of the pin shaft, and a sealing ring for sealing the outer circle of the pin shaft and the inner circle of the pin hole is arranged in the sealing groove.

The utility model has the advantages that:

when fluid is injected into the inner cavity of the drill rod, the fluid can enter the pin hole through the pressure hole to apply axial pressure to the pin shaft and further drive the pin shaft to overcome elastic axial sliding of the elastic part, the head part of the pin shaft slides out of the pin hole and is inserted into the plug hole to form circumferential locking to the male joint and the female joint, when the drill rod rotates reversely, the adjacent drill rods cannot rotate to cause the phenomenon of drill release, when the fluid pressure in the inner cavity of the drill rod is reduced and the pin shaft cannot overcome the elastic force, the pin shaft is driven by the elastic force of the elastic part to retract into the pin hole, when the drill rod rotates reversely, the adjacent drill rods can rotate relatively, disassembly of the drill rod is facilitated, the drill rod of the structure has simple structure and easy operation and control, circumferential locking and unlocking between the adjacent drill rods can be controlled through the fluid commonly used in the drilling process, the drill rod can be circumferentially locked, positive, therefore, the drill pipe is prevented from being stuck and clamped, the drill pipe can be circumferentially unlocked and reversely disassembled, the link of manual auxiliary disassembly and assembly is reduced, the automatic disassembly of the drilling machine can be realized, and the automatic construction efficiency of the drilling machine can be greatly improved.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is a schematic view of a female coupling structure;

FIG. 4 is a schematic sectional view of the female connector;

FIG. 5 is a schematic view of a male-female connector structure;

FIG. 6 is a schematic cross-sectional view of the male connector;

FIG. 7 is a schematic view of a pin structure;

FIG. 8 is a schematic cross-sectional view of the pin;

FIG. 9 is a schematic view of a hanger shaft structure;

FIG. 10 is a cross-sectional structural view of the hanger shaft;

FIG. 11 is a schematic view of a plug structure;

FIG. 12 is a schematic cross-sectional view of a plug;

FIG. 13 is a schematic view of a drill rod pin shaft embedding structure;

FIG. 14 is a schematic view of a drill rod pin separation structure;

Detailed Description

As shown in the figure: in this embodiment, a drill rod assembly is taken as an example, wherein a rod body is a drill rod, the drill rod assembly specifically includes a rod body 10, a male joint 20 connected to two ends of the rod body, and a female joint 30 for being in threaded connection with the male joint, where the threaded connection of the male joint and the female joint means that the male joint of one drill rod is connected with the female joint of an adjacent drill rod, the male joint and the female joint on the same drill rod do not have a direct interconnection relationship, the rod body, the male joint and the female joint are hollow structures to form a fluid channel 40 which is axially communicated with each other and with the outside, a pin assembly is disposed at an end of the male joint, the pin assembly includes a pin hole 21 axially disposed at an end of the male joint, a pin 22 axially slidably disposed in the pin hole, and an elastic member 23, the elastic member has an elastic force for axially retracting the pin into the pin hole, and an insertion hole 31 matched with the, and a pressure hole 27 for communicating the fluid channel with the pin hole is formed in the male connector, and the pressure hole is used for enabling fluid to enter the pin hole so as to drive the pin shaft to slide outwards and be inserted into the plug hole.

The inner end parts of the male joint and the female joint are one ends which are close to the rod body in the axial direction, the outer end parts of the male joint and the female joint are one ends which are far away from the rod body in the axial direction, the fluid referred to here is liquid or gas, and the rod body is in a tubular structure and is made of high-strength wear-resistant seamless steel pipes as shown in a combined drawing 1 and a combined drawing 2; the pin shaft is made of high-strength alloy materials and used for ensuring the positioning insertion of the reverse rotation of the drill rod, and the outer end of the pin shaft is provided with a threaded hole I22b so as to be convenient for guiding the pin shaft to be installed in the pin hole; the male joint and the female joint are axially provided with through flow passages, wherein the diameter of the inner circle of the rod body is larger than that of the male joint and the female joint, the male joint and the female joint are welded at two ends of the rod body through friction welding, so that fluid passages axially penetrating through the interior of the drill rods are formed, the drill rods are mutually connected, so that the fluid passages are sequentially connected to form the flow passages extending into the drill holes, high-pressure liquid or gas can be injected into the drill holes through the flow passages, the male joint is provided with an external thread section, the female joint is provided with an internal thread hole, after the male joint of the drill rods is connected with the female joint of another drill rod, the bolt assembly of the drill rod is matched with the plug hole of another drill rod, and as shown in the combined drawing 2 and the drawing 6, the diameter of the pressure hole is smaller, the pressure hole is axially arranged in the inner circle of the male joint and penetrates into the pin hole, when fluid is injected into the fluid passages, the head part of the pin roll slides out of the pin hole and is inserted into the plug hole to form circumferential locking on the male joint and the female joint, when the drill rod rotates reversely, the adjacent drill rods cannot rotate to cause the drill tripping phenomenon, when the fluid pressure in the fluid channel is reduced and the pin roll cannot overcome the elastic force, the pin roll is driven by the elastic force of the elastic part to retract into the pin hole, when the drill rod rotates reversely, the adjacent drill rods can rotate relatively to facilitate the disassembly of the drill rods, the drill rod of the structure has simple structure and easy operation and control, the circumferential locking and unlocking between the adjacent drill rods can be controlled by the commonly used fluid in the drilling process, the drill rod can be circumferentially locked, the positive and negative alternate rotation and the reciprocating hole sweeping are realized to enhance the slag discharge and the pressure relief, thereby the occurrence of drill jamming and drill holding is avoided, the drill rod can also be circumferentially unlocked and reversely disassembled, the, the automatic construction efficiency of the drilling machine can be greatly improved.

In this embodiment, the pin hole 21 axially penetrates through two axial ends of the male connector, the inner end of the pin hole is sealed by the plug 24, the pin shaft is located on the axial outer side of the plug and axially seals and slides in the pin hole, the elastic member is located between the plug and the pin shaft, and the pressure hole 27 is communicated with a space in the pin hole located between the pin shaft and the plug. Referring to fig. 5 and 6, the inner end of the pin hole is an internal threaded hole structure, and the end cap thread is screwed into the internal threaded hole to seal the end part, and the internal threaded hole and the pin hole are required to keep good coaxiality; the inner end part of the plug is provided with a threaded hole II24a for guiding the installation of the plug, and the plug and the pin shaft enable two ends in the pin hole to be sealed, so that fluid leakage can be prevented, and the pin shaft is driven reliably by maintaining fluid pressure.

In this embodiment, a plurality of bolt assemblies are evenly provided in the circumference of the end portion of the male connector, the end portion of the female connector is provided with a plurality of inserting holes matched with the respective pin shafts one by one, and a plurality of pressure holes communicated with the respective inserting holes are formed in the male connector. With reference to fig. 3 and 5, in the present embodiment, six sets of the bayonet pin assemblies are provided, six bayonet holes are correspondingly provided on the female joint, and six pressure holes are provided in the male joint, so that the structure can improve the circumferential stress uniformity when adjacent drill rods are locked in the circumferential direction, thereby improving the torque that the drill rods can bear.

In this embodiment, the outer end of the plug and the inner end of the pin shaft are provided with grooves 28 for accommodating two ends of the elastic member. The recess is circular shape blind hole structure, and this structure can form the direction to the deformation of elastic component, prevents that the elastic component from heeling, also does benefit to the installation location of elastic component simultaneously.

In this embodiment, the hanging shafts 25 are radially fixed in the groove 28, and two ends of the elastic member are respectively hooked on the two hanging shafts. The elastic piece adopts extension spring, and extension spring's both ends have the circular hook, and two circular hooks are hooked respectively and are used for extension spring's connection and installation on two pegs.

In this embodiment, a set of threaded mounting holes 28a is radially formed in the groove, and two ends of the hanging shaft are in threaded connection with the two threaded mounting holes. As shown in fig. 8 and 12, two thread mounting holes are radially and oppositely formed in each groove, the two thread mounting holes can be both in a through hole structure or in a structure with one through hole and one blind hole, and the two ends of the hanging shaft are detachably connected in the two thread mounting holes through threads, so that the hanging shaft is favorably mounted and dismounted.

In this embodiment, the hanging shaft is a stepped shaft structure with two large ends and a small middle part, and the two ends of the hanging shaft are provided with thread sections 25a with external threads. The hanging shaft middle part minor diameter section does benefit to the hanging shaft middle part and passes the screw thread mounting hole, the installation of the hanging shaft of being convenient for, and the hanging shaft middle part also is regarded as the hookup position of stay cord spring simultaneously, and the both ends face of hanging shaft is equipped with 4 elongated hole 25b for the installation location.

In this embodiment, the insertion hole 31 is a kidney-shaped hole. The length direction of the waist-shaped hole is consistent with the circumferential direction of the end face of the female joint, the arrangement of the waist-shaped hole can increase the error tolerance of the circumferential relative position of the male joint and the female joint of another drill rod, the reliable insertion connection of a pin shaft is facilitated, and the drill rod is ensured not to be tripped after being reversed.

In this embodiment, the male joint is a stepped shaft structure with a small outer end and a large inner end, the small diameter section of the male joint is a tapered male connector with a gradually decreasing outer diameter, and the pin assembly is disposed at a shoulder of the male joint. The end part of the female joint is provided with a conical internal thread hole, the insertion holes are formed in the end part of the female joint and distributed circumferentially around the internal thread hole, and the male joint with the structure is not only favorable for being connected with the female joint for assembly, but also convenient for installation and positioning.

In this embodiment, the outer circle of the pin shaft is provided with an annular sealing groove 22a, and a sealing ring 26 for sealing between the outer circle of the pin shaft and the inner circle of the pin hole is arranged in the sealing groove. The sealing ring is made of rubber, and the pin shaft is slidably sealed in the pin hole through the rubber ring;

as shown in connection with fig. 13, the automatic drill-up process: the drill rod I60 is clamped by a drilling machine clamp, the drill rod II50 is used as an upper drill rod, and the male joint of the drill rod II50 is screwed into the female joint of the drill rod I60 through the rotary propulsion of the drill rod II50, so that the screwing of the drill rod I60 and the drill rod II50 is completed. Then, fluid is introduced from the tail part of the drill rod II50, the fluid flows into the pin hole from the pressure hole in the male joint through the interior of the drill rod II50, the fluid pushes the pin shaft to extend out, so that the pin shaft is inserted into the insertion hole of the female joint of the drill rod I60, the drill rod II50 and the drill rod I60 are connected, reverse torque can be borne through the pin shaft, forward torque and axial stress can be borne through the conical thread structure of the male joint, and automatic drilling of the drill rod is completed.

As shown in fig. 14, the automatic drill unloading process: the drill rod I60 is clamped by a drill machine clamp, the drill rod II50 is used as a drill unloading drill rod, the fluid stops supplying, and under the reset action of the elastic piece 23, the pin shaft of the drill rod II50 is withdrawn from the plug hole of the female joint of the drill rod I60 and retracts to the initial state. At the moment, the drill rod II50 and the drill rod I60 are separated from a reversible state; and then the male joint of the drill rod II50 is screwed out of the female joint of the drill rod I60, so that the drill rod II50 and the drill rod I60 are completely separated, and the automatic drill unloading of the drill rod is completed.

Finally, 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 the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (10)

1. The utility model provides a but just reversing automatic disassembly formula tool joint which characterized in that: the drilling rod comprises a male connector connected to a drilling rod and a female connector used for being in threaded connection with the male connector, wherein a bolt assembly is arranged at the end part of the male connector, the bolt assembly comprises a pin hole axially formed in the end part of the male connector, a pin shaft axially and slidably arranged in the pin hole and an elastic piece, the elastic piece has elastic force enabling the pin shaft to axially retract into the pin hole, an insertion hole matched with the pin shaft is formed in the end part of the female connector, a pressure hole enabling an inner cavity of the drilling rod to be communicated with the pin hole is formed in the male connector, and the pressure hole is used for enabling fluid in the inner cavity of the drilling rod to enter the pin hole and further driving the pin shaft to slide.

2. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 1, wherein: the pin hole axially penetrates through two axial ends of the male connector, the inner end part of the pin hole is sealed through the plug, the pin shaft is located on the axial outer side of the plug and is axially sealed and slidably sleeved in the pin hole in a sliding mode, the elastic piece is located between the plug and the pin shaft, and the pressure hole is communicated with a space, located between the pin shaft and the plug, in the pin hole.

3. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 1, wherein: the male connector end is evenly provided with a plurality of bolt assemblies in the circumferential direction, the female connector end is provided with a plurality of inserting holes matched with the pin shafts one by one, and a plurality of pressure holes communicated with the inserting holes are formed in the male connector.

4. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 2, wherein: and grooves for accommodating two ends of the elastic part are formed in the outer end part of the plug and the inner end part of the pin shaft.

5. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 4, wherein: hanging shafts are radially fixed in the grooves, and two ends of the elastic piece are respectively hooked on the two hanging shafts.

6. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 5, wherein: a group of threaded mounting holes are radially formed in the groove, and two ends of the hanging shaft are in threaded connection with the two threaded mounting holes.

7. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 6, wherein: the hanging shaft is of a stepped shaft structure with two large ends and a small middle part, and the two ends of the hanging shaft are provided with thread sections with external threads.

8. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 1, wherein: the plug hole is a waist-shaped hole.

9. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 1, wherein: the male connector is of a stepped shaft structure with a small outer end and a large inner end, the small diameter section of the male connector is a tapered external thread connector with a gradually reduced external diameter, and the bolt component is arranged at the shaft shoulder of the male connector.

10. The positive and negative rotation automatic detachable drill rod joint as claimed in claim 2, wherein: the outer circle of the pin shaft is provided with an annular sealing groove, and a sealing ring for sealing the outer circle of the pin shaft and the inner circle of the pin hole is arranged in the sealing groove.

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