CN214170471U - Self-locking drill rod assembly capable of rotating forwards and backwards - Google Patents
Self-locking drill rod assembly capable of rotating forwards and backwards Download PDFInfo
- Publication number
- CN214170471U CN214170471U CN202022323836.9U CN202022323836U CN214170471U CN 214170471 U CN214170471 U CN 214170471U CN 202022323836 U CN202022323836 U CN 202022323836U CN 214170471 U CN214170471 U CN 214170471U
- Authority
- CN
- China
- Prior art keywords
- drill rod
- sliding sleeve
- mandrel
- joint
- male
- 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
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a but from locking-type positive and negative rotation drilling rod assembly, including the body of rod, male joint, female joint, dabber and slip cap, the dabber endotheca is in the body of rod and has the drive power that the axial slided backward, slip cap axial seal slip overcoat is on male joint and with male joint transmission cooperation, slip cap front end and female joint rear end have the meshing tooth, when back drilling rod male joint and middle drilling rod female joint threaded connection, back drilling rod male joint axial promotes the dabber in the middle drilling rod and slides forward with the slip cap axial for the slip cap of middle drilling rod meshes with the meshing tooth of preceding drilling rod female joint; the utility model can realize automatic locking and unlocking of the upper drill and the lower drill through the matching relation between the adjacent drill rods, and can realize positive and negative alternate rotation and reciprocating hole sweeping to enhance slag discharge and unblocking pressure relief, thereby avoiding the occurrence of sticking and holding the drill; the link of manual auxiliary disassembly and assembly is omitted, mechanical automatic assembly and disassembly of the drill rod are achieved, and the automatic construction efficiency of the drilling machine can be greatly improved.
Description
Technical Field
The utility model relates to a mining machinery technical field, in particular to but from locking-type just reverse drilling rod assembly.
Background
The gas disaster is one of main disasters affecting coal mine safety production, and the current main technical means for controlling the gas disaster is to use a drilling machine to construct gas drainage drill holes. The drill rod is used as a matched tool of the drilling machine and is an important factor directly related to the hole forming quality, the construction efficiency and the drainage effect.
In the current hole-drawing drilling operation, 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, 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 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 self-locking drill rod assembly capable of rotating forward and backward, which can achieve automatic assembly and disassembly of a drill rod and improve the automatic construction efficiency of a drilling machine on the basis of achieving forward and backward rotation of the drill rod.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a but from locking-type just reverse drilling rod assembly on can realizing the basis that the drilling rod just reverses, enough realize the auto-control handling of drilling rod, improve the automatic efficiency of construction of rig.
The self-locking drill rod assembly capable of rotating forward and backward comprises a rod body, a male joint connected with the two ends of the rod body, a female joint in threaded connection with the male joint, a mandrel and a sliding sleeve, the rod body, the male joint and the female joint are hollow structures to form a fluid channel which is communicated with each other in the axial direction and is communicated with the outside, the mandrel is sleeved in the rod body and has a driving force for axially sliding backwards, the sliding sleeve is sleeved on the male joint in an axially sealed sliding manner and is in transmission fit with the male joint, 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 joint are provided with tooth-embedded engaging teeth which are matched with each other for circumferential locking, when the male joint of the rear drill rod is in threaded connection with the female joint of the middle drill rod, the rear drill rod male joint axially pushes a mandrel in the middle drill rod and the sliding sleeve to axially slide forwards, so that the sliding sleeve of the middle drill rod is meshed with the jaw type meshing teeth of the front drill rod female joint.
Furthermore, a pair of linkage holes which are radially communicated are formed in the male connector, linkage blocks radially penetrate through the pair of linkage holes and are connected with the core shaft and the sliding sleeve, and the linkage blocks are arranged in the linkage holes in an axially sliding mode.
Furthermore, the female joint and the male joint are internally provided with guide holes matched with the excircle of the mandrel.
Further, an elastic piece is arranged in the female joint, and the elastic piece has elastic force for enabling the mandrel to slide backwards in the axial direction.
Furthermore, the female joint is internally and radially inwards protruded 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 abuts against a shoulder of the guide hole and the rear end of the elastic piece abuts against a shoulder of the stepped shaft.
Further, the sliding sleeve is in transmission fit with the male connector through a spline.
Furthermore, a flow guide hole which enables the cavities on the two axial sides of the guide hole to be communicated is formed in the core shaft.
Further, the linkage block and the sliding sleeve form axial linkage fit through a pin.
Furthermore, the inner circle of the sliding sleeve and the outer circle of the male connector are sealed through a sealing ring.
Furthermore, 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 thread connector with the forward external diameter gradually reduced, and a conical internal thread hole matched with the conical section of the male connector is formed in the female connector.
The utility model has the advantages that:
the utility model utilizes the screw thread to transmit the positive torque and bear the axial load, and transmits the reverse torque through the meshing of the tooth-embedded type meshing teeth; in the actual drilling process, every time a rear drill rod is added, the male head of the rear drill rod pushes the mandrel of the middle drill rod to enable the middle drill rod to be meshed with the jaw-type meshing teeth of the front drill rod to realize mutual locking, and reverse drilling is realized; when the drill is drilled downwards, after one rear drill rod is removed, the jaw-type meshing teeth of the middle drill rod and the front drill rod are automatically separated and unlocked, so that the drill rods can be continuously removed; the drill rods of the structure are simple in structure and easy to operate and control, automatic locking of drilling can be achieved through the matching relation between adjacent drill rods, forward and reverse alternate rotation and reciprocating hole sweeping can be achieved to enhance slag discharge and unblocking pressure relief, and therefore the occurrence of drill blocking and drill holding is avoided; the drilling rod can also realize automatic unlocking during drilling, so that the link of manual auxiliary disassembly and assembly is omitted, mechanical automatic assembly and disassembly of the drilling rod are 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 sliding sleeve structure;
FIG. 4 is a schematic cross-sectional view of the sliding sleeve;
FIG. 5 is a schematic view of a rod, a male connector and a male-female connector structure;
FIG. 6 is a schematic cross-sectional view of the linkage block;
FIG. 7 is a schematic sectional view A-A of FIG. 5;
FIG. 8 is a schematic axial cross-sectional view of FIG. 5;
FIG. 9 is an enlarged partial schematic view of FIG. 8;
FIG. 10 is a schematic view of the structure of FIG. 8 in the direction B;
FIG. 11 is a schematic view of a mandrel configuration;
FIG. 12 is a schematic view of a matching structure of a drill rod I and a drill rod II;
FIG. 13 is a schematic view of a structure of the drill rod II and the drill rod III;
Detailed Description
As shown in the figure: the self-locking drill rod assembly capable of rotating forward and backward 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 refers to the fact that the male connector of one drill rod is connected with the female connector of an adjacent drill rod, and the male connectors and the female connectors on the same drill rod are not directly connected with each other; the rod body, the male joint and the female joint are hollow structures to form a fluid channel which is axially communicated with each other and is communicated with the outside, the mandrel is sleeved in the rod body and has a driving force which axially slides backwards, the driving force can be provided by an elastic part or driving equipment, the sliding sleeve is sleeved on the male joint in an axially sealed sliding mode and is in transmission fit with the male joint, 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 joint are provided with tooth-embedded type meshing teeth which are matched with each other and used for circumferential locking, the matching of the sliding sleeve and the female joint refers to the matching between the sliding sleeve of one drill rod and the female joint of the adjacent drill rod, and the sliding sleeve and the female joint on the same drill rod do not have direct matching relation; when the rear drill rod male joint is in threaded connection with the middle drill rod female joint, the rear drill rod male joint axially pushes a 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 jaw type meshing teeth of the front drill rod female joint.
The backward direction is the side close to the female joint axially, the forward direction is the side close to the male joint axially, the axial linkage means that the mandrel can drive the sliding sleeve to axially slide when axially sliding, and as shown in a combined figure 13, a drill rod II82 is taken as a middle 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 a tubular structure and is made of a high-strength wear-resistant seamless steel tube; the male joint and the female joint are axially provided with through flow passages, the male joint and the female joint are welded at two ends of a rod body through friction welding, so that fluid passages which axially penetrate through the drill rods are formed inside the drill rods, the drill rods are mutually connected, so that the fluid passages are sequentially connected to form the flow passages which extend into the drill holes, cutting fluid and deslagging fluid can be injected outside 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, 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 meshing teeth at the rear end of the female joint are concave internal tooth inserts 31, the male joint and the female joint are matched to form a tooth insert type connection structure, and the meshing teeth of the female joint of the front drill rod and the sliding sleeve of the rear drill rod are engaged to form a combined state, so that the drill rods can reversely rotate and bear reverse torque; in order to ensure the 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 drill rod male joint and the drill rod female joint should be consistent, so that the jaws can not be locked;
referring to fig. 1 and 13, the front end of the male joint of the second drill rod 82 is internally screwed into the female joint of the first drill rod 81, the sliding sleeve on the second drill rod axially faces the female joint of the first drill rod, the mandrel in the second drill rod is driven by the driving force and drives the sliding sleeve of the second drill rod to axially slide backwards, the sliding sleeve of the second drill rod is far away from the female joint of the first drill rod, the meshing teeth of the sliding sleeve and the female joint of the first drill rod are not meshed with each other, and the drill rod can only rotate forwards; 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 and axially pushes a mandrel in the drill rod II to axially slide, the mandrel in the drill rod II drives a sliding sleeve shaft of the drill rod II to axially slide forwards by overcoming a driving force, a sliding sleeve of the drill rod II is meshed with meshing teeth of the female joint of the drill rod I, the sliding sleeve of the drill rod II is circumferentially locked with the female joint of the drill rod I to form transmission fit, 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 the drill rod can rotate forwards or reversely at the moment;
the utility model utilizes the screw thread to transmit the positive torque and bear the axial load, and transmits the reverse torque through the meshing of the meshing teeth; in the actual drilling process, when a rear drill rod is added, the male head of the rear drill rod pushes the mandrel of the middle drill rod to enable the meshing teeth of the middle drill rod and the front drill rod to be meshed to realize mutual locking, so that reverse drilling is realized; when the drill is drilled downwards, the meshing teeth of the middle drill rod and the front drill rod are automatically separated and unlocked when one rear drill rod is removed, so that the drill rods can be continuously removed; the drill rod of the structure is simple in structure and easy to operate and control, automatic locking of the upper drill rod can be achieved through the matching relation between adjacent drill rods, positive and negative alternate rotation and reciprocating hole sweeping can be achieved to enhance slag discharge and jam release, so that jamming and holding of the drill rod are avoided, automatic unlocking of the lower drill rod can be achieved, manual assistance is omitted, the link of assembling disassembly is omitted, mechanical automatic assembly and disassembly of the drill rods are achieved, and the automatic construction efficiency of the drilling machine can be greatly improved.
In this embodiment, the male connector is provided with a pair of radially through-going linkage holes 23, and a linkage block 61 is radially penetrated 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 disposed in the linkage holes. Referring to fig. 8, the linkage hole is formed in the cylindrical section 21 of the male connector, the two linkage holes are opposite in radial direction, the linkage hole is of a square through hole structure, the linkage block is of a substantially rectangular structure, two ends of the linkage block are internally 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 linkage hole and the linkage block, so that the linkage block can axially slide in the linkage hole; referring to fig. 2, the sliding sleeve is sleeved outside 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 to the inner wall of the sliding sleeve, a rectangular connection square hole 45 is radially formed in the near-front end of the mandrel, the linkage block penetrates through the connection square hole and is connected with the mandrel into a whole, and of course, the linkage block, the sliding sleeve and the mandrel can be connected in a fixed connection manner or in other known connection manners, which is not specifically described again; through the structure, the sliding sleeve, the linkage block and the mandrel are connected into a whole, the three axially move into a whole, and simultaneously, the three synchronously rotate.
In this embodiment, the female joint and the male joint are internally provided with guide holes matched with the excircle of the mandrel. Referring to fig. 2 and 8, the conical section 22 of the male connector has a stepped hole structure with a small front part and a large rear part, the inner small diameter section of 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 hole 32 has a stepped hole structure with a small front part and a large rear part, 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 serve as guide holes, the mandrel is axially slidably inserted into the guide holes, and when there is no external driving force, the mandrel is driven to slide backwards, the near-rear end of the mandrel is located in the female stepped hole I33, the front end of the mandrel slides out of the male stepped hole II222 at the moment, the mandrel is supported through the female stepped hole I33 and the linkage block 61 at the moment, when the mandrel is driven to axially slide forwards, the front end of the mandrel slides into the male stepped hole II222, and of course, the front end of the mandrel can also be located in the male stepped hole II222 all the time to form a good guiding effect.
In this embodiment, an elastic member 70 having an elastic force to axially slide the spindle rearward is provided in the female connector 30. In the embodiment, the elastic part is a cylindrical spiral spring, the elastic part can also be other known elastic structures, the elastic part is pre-installed at the position, close to the rear end, of the mandrel in a pre-tightening mode, when the mandrel cancels the external axial load, the mandrel can slide backwards in the axial direction to return to the initial position by means of the reset action of the elastic part, and at the moment, the sliding sleeve between adjacent drill rods and the meshing teeth of the female joint are separated to automatically form an unlocking state.
In this embodiment, the female joint has a stepped guide hole formed by radially and inwardly protruding inside, the rear end of the mandrel is a stepped shaft with a small front end and a large rear end, the elastic member 70 is sleeved on the small diameter section of the rear end of the mandrel, the front end of the elastic member abuts against a shoulder of the guide hole, and the rear end of the elastic member abuts against a shoulder of the stepped shaft. Referring to fig. 2 and 11, the small diameter section of the rear end of the mandrel is sleeved in the female stepped hole I33 to form a guide, and the elastic element is located in the female stepped hole II34, so that the structure is favorable for installation of the elastic element.
In this embodiment, the sliding sleeve 50 is in spline transmission fit with the male connector. With reference to fig. 2, fig. 3 and fig. 8, the excircle of the cylindrical section 21 of the male joint is a stepped shaft with a small front part and a large rear part, 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 part and a large rear part, the large diameter section in the inner cavity of the sliding sleeve is provided with an internal spline, the small diameter section in the inner cavity of the sliding sleeve is in axial sliding fit with the small diameter section of the cylindrical section 21, the linkage hole 23 is arranged in the large diameter section of the cylindrical section 21, a certain clearance is reserved in spline pair fit, so that the sliding sleeve can move axially, and the spline pair is used for transmitting circumferential torque and guiding axial sliding through spline fit.
In this embodiment, the core shaft is provided with a flow guide hole for communicating the cavities on the two axial sides of the guide hole. Referring to fig. 2 and 11, a front threaded hole 41 is formed in the front end of the mandrel, a rear threaded hole 42 is formed in the rear end of the mandrel, so that guiding installation and matching are facilitated, when the mandrel 40 is installed, a special tool is 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 of the mandrel 40 is matched with the male stepped hole II222, and the rear end of the mandrel 4 is matched with the female stepped hole II 34; the inner diameter of the front threaded hole 41 is provided with a front drainage hole 43 which runs through the outer wall of the mandrel, the inner diameter of the rear threaded hole 42 is provided with a rear drainage hole 44 which runs through the outer wall of the mandrel and is used for guiding cutting fluid and slag discharging fluid, wherein the front threaded hole 41 is combined with the front drainage hole 43 to be used as a front guide hole of the mandrel, and the rear threaded hole 42 is combined with the rear drainage hole 44 to be used as a rear guide hole of the mandrel; when drilling construction, the drilling rod rear end lets in cutting fluid and row's sediment liquid, from screw hole 42 behind the dabber, get into the body of rod inside through back wash port 44, flow through preceding drain hole 43 again, through preceding screw hole 41, public first step hole II222, public first step hole I221 flows into the dabber back screw hole 42 that the preceding root drilling rod corresponds, of course, under the prerequisite that dabber length and diameter allowed, can directly run through the straight water conservancy diversion hole in the front and back end at the central axial processing of dabber, the concrete structure in water conservancy diversion hole can be according to the improvement of actual structure looks adaptation, specifically not being repeated.
In this embodiment, the linkage block 61 and the sliding sleeve 50 form an axial linkage fit by the pin 62. The pins 62 are made of high-strength alloy materials and used for connecting the sliding sleeve 50 and the linkage block 61, as shown in fig. 2, fig. 3 and fig. 6, four outer pin holes 52 are formed in the sliding sleeve and divided into two groups and are opposite to each other in the radial direction, two inner pin holes 63 are formed in two ends of the linkage block 61 respectively, the positions of the inner pin holes and the positions of the outer pin holes are matched, and the sliding sleeve and the linkage block are connected through the four pins to form axial linkage.
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 the combination of the figure 2 and the figure 8, a sealing ring mounting groove I211 and a sealing ring mounting groove II 212 are arranged on the outer circle of the cylindrical section 21 of the male joint, the two sealing ring mounting grooves are located on the two axial sides of the external spline, sealing rings are mounted in the two sealing grooves and made of rubber materials, and the outer circle of the male joint and the inner circle of the sliding sleeve are sealed through the sealing rings to achieve the waterproof and dustproof effects.
In this embodiment, the male connector includes a cylindrical section 21 connected to the rod body and a conical section 22 connected to the cylindrical section, the conical section 22 is a tapered male connector whose forward outer diameter gradually decreases, and the female connector has a tapered female 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 fig. 12 and 13, the automatic drilling process: the drill rod I81 is clamped by a drilling machine clamp, the drill rod II82 is used as an upper drill rod, and the male joint of the drill rod II82 is screwed into the female joint of the drill rod I81 through the rotary propulsion of the drill rod II82, so that the screwing of the drill rod I81 and the drill rod II82 is completed; then, a male joint of the drill rod III83 is screwed into a female joint of the drill rod II82, the male joint of the drill rod III83 pushes a mandrel of the drill rod II82 to slide forwards and axially, an elastic piece in the drill rod II82 is in a compressed state, and a linkage block and a pin of the drill rod II82 drive a sliding sleeve to move forwards, so that an outer jaw on the sliding sleeve of the drill rod II82 is embedded into an inner jaw of the female joint of the drill rod I81, and the circumferential locking of the drill rod I81 and the drill rod II82 is realized; 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 clamped by a drilling machine clamp, the drill rod II82 is used as a drill unloading drill rod, the drill rod II is withdrawn through the rotation of the drill rod III83, the male joint of the drill rod III83 is screwed out of the female joint 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 and returns 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, then the male joint of the drill rod II82 is screwed out of the female joint of the drill rod I81, the drill rod I81 and the drill rod II82 are completely separated, and 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 self-locking drill rod assembly capable of rotating forwards and backwards is characterized in that: comprises a rod body, a male joint connected with two ends of the rod body, a female joint used for being in threaded connection with the male joint, a mandrel and a sliding sleeve, the rod body, the male joint and the female joint are hollow structures to form a fluid channel which is communicated with each other in the axial direction and is communicated with the outside, the mandrel is sleeved in the rod body and has a driving force for axially sliding backwards, the sliding sleeve is sleeved on the male joint in an axially sealed sliding manner and is in transmission fit with the male joint, 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 joint are provided with tooth-embedded engaging teeth which are matched with each other for circumferential locking, when the male joint of the rear drill rod is in threaded connection with the female joint of the middle drill rod, the rear drill rod male joint axially pushes a mandrel in the middle drill rod and the sliding sleeve to axially slide forwards, so that the sliding sleeve of the middle drill rod is meshed with the jaw type meshing teeth of the front drill rod female joint.
2. The self-locking reversible drill pipe assembly according to claim 1, characterized in that: the male connector is provided with a pair of linkage holes which are radially communicated, linkage blocks radially penetrate through the linkage holes and are connected with the core shaft and the sliding sleeve, and the linkage blocks are arranged in the linkage holes in an axially sliding mode.
3. The self-locking reversible drill pipe assembly according to claim 1, characterized in that: and guide holes matched with the excircle of the mandrel are formed in the female joint and the male joint.
4. The self-locking reversible drill pipe assembly according to claim 3, characterized in that: an elastic piece is arranged in the female joint and has elastic force for enabling the mandrel to slide backwards in the axial direction.
5. The self-locking reversible drill pipe assembly according to claim 4, characterized in that: the female joint is characterized in that a stepped guide hole is formed by inward radial protrusion in the female joint, 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, the front end of the elastic piece abuts against a shoulder of the guide hole, and the rear end of the elastic piece abuts against a shoulder of the stepped shaft.
6. The self-locking reversible drill pipe assembly according to claim 1, characterized in that: the sliding sleeve is in transmission fit with the male connector through a spline.
7. The self-locking reversible drill pipe assembly according to claim 5, characterized in that: and the mandrel is provided with a flow guide hole which enables the cavities on two axial sides of the guide hole to be communicated.
8. The self-locking reversible drill pipe assembly according to claim 2, characterized in that: the linkage block and the sliding sleeve form axial linkage fit through a pin.
9. The self-locking reversible drill pipe assembly according to claim 1, characterized in that: the inner circle of the sliding sleeve and the outer circle of the male connector are sealed through a sealing ring.
10. The self-locking reversible drill pipe assembly according to claim 1, characterized in that: 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 thread connector with the forward external diameter gradually reduced, and a conical internal thread hole matched with the conical section of the male connector is formed in the female connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022323836.9U CN214170471U (en) | 2020-10-18 | 2020-10-18 | Self-locking drill rod assembly capable of rotating forwards and backwards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022323836.9U CN214170471U (en) | 2020-10-18 | 2020-10-18 | Self-locking drill rod assembly capable of rotating forwards and backwards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214170471U true CN214170471U (en) | 2021-09-10 |
Family
ID=77597256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022323836.9U Active CN214170471U (en) | 2020-10-18 | 2020-10-18 | Self-locking drill rod assembly capable of rotating forwards and backwards |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214170471U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2032272A (en) * | 2022-03-10 | 2023-09-13 | Univ China Mining | Ratchet-type automatic-assembling-and- disassembling forward-and-reverse-rotatable communication drill pipe for coal mine drilling robot |
-
2020
- 2020-10-18 CN CN202022323836.9U patent/CN214170471U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2032272A (en) * | 2022-03-10 | 2023-09-13 | Univ China Mining | Ratchet-type automatic-assembling-and- disassembling forward-and-reverse-rotatable communication drill pipe for coal mine drilling robot |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112343521A (en) | Ratchet self-locking drill rod capable of rotating forwards and reversely | |
| CN112576203A (en) | Self-locking drill rod capable of rotating forwards and backwards | |
| CN112576204A (en) | Ratchet type drill rod capable of rotating forwards and backwards | |
| CN110374521B (en) | Mining positive and negative rotation automatic dismounting type drill rod | |
| US11015392B2 (en) | Dual member pipe joint for a dual member drill string | |
| CN112360354B (en) | Mining drill rod assembly capable of rotating forwards and backwards | |
| CN214170471U (en) | Self-locking drill rod assembly capable of rotating forwards and backwards | |
| WO2022121237A1 (en) | Teeth-embedded motion-stop forward/reverse rotation drill pipe | |
| CN209761371U (en) | bearing assembly for tubular column and tubular column | |
| CN111236840B (en) | Anchoring tool for slope guiding device | |
| CN210598918U (en) | Soluble bridge plug beneficial to quick dissolution | |
| CN112324362B (en) | Positive and negative rotation automatic detachable drill rod | |
| CN104712279B (en) | Coiled tubing hydraulic double-way jar | |
| CN214091750U (en) | Ratchet type drill rod assembly capable of rotating forwards and reversely | |
| CN210685904U (en) | Easy-to-release milling and fishing integrated device | |
| CN106014284B (en) | Rotating tool joint that spline socket joint plug-in is mining | |
| CN209875112U (en) | Fracturing bridge plug | |
| US8167340B2 (en) | Drill stem tubular connection with internal stiffener ring | |
| CN215108785U (en) | Ratchet self-locking drill rod assembly capable of rotating forwards and reversely | |
| CN207761585U (en) | A kind of drilling rod | |
| CN110017116B (en) | Fracturing bridge plug | |
| CN213450280U (en) | Drill rod joint capable of being automatically disassembled in forward and reverse rotation | |
| CN205805439U (en) | Rotating tool joint that spline socket joint plug-in is mining | |
| CN202850882U (en) | Drill rod right and reverse rotating connection device for underground coal mine drilling machine | |
| CN214463960U (en) | Drill rod quick connector and drill rod comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |