CN113107402B - Double-channel variable-diameter cave-making device - Google Patents
Double-channel variable-diameter cave-making device Download PDFInfo
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- CN113107402B CN113107402B CN202110537878.9A CN202110537878A CN113107402B CN 113107402 B CN113107402 B CN 113107402B CN 202110537878 A CN202110537878 A CN 202110537878A CN 113107402 B CN113107402 B CN 113107402B
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- 238000007789 sealing Methods 0.000 claims description 33
- 230000009977 dual effect Effects 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 15
- 230000009471 action Effects 0.000 abstract description 3
- 239000003245 coal Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000007599 discharging Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Classifications
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
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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
- E21B12/00—Accessories for drilling tools
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention relates to the technical field of drilling tools for drilling, expanding and pressure relief, in particular to a double-channel variable-diameter hole making device, which comprises: the hole making device comprises a hole making rod body, a drill magazine connected with one end of the hole making rod body, and a drill tail connected with the other end of the hole making rod body, wherein the hole making rod body is provided with a first inner cavity, the drill magazine is provided with a second inner cavity, the drill tail is provided with a third inner cavity, and the first inner cavity is communicated with the second inner cavity; the dual-channel variable-diameter cave-making device further comprises: the device comprises a rack structure which reciprocates in the first inner cavity, and a knife swinging structure which is arranged on the hole making rod body, is meshed with the rack structure and swings under the driving of the rack structure. According to the scheme of the invention, through the double-channel arrangement, the requirement of medium introduction during normal drilling of equipment is met, and the small-flow high-pressure medium can be used for driving the swinging cutter arm to open when reaming operation is required, so that the swinging cutter arm is more direct and reliable in opening action.
Description
Technical Field
The invention relates to the technical field of drilling tools for drilling, expanding and pressure relief, in particular to a double-channel variable-diameter hole making device.
Background
Outburst prevention treatment under a coal mine is always the first safety task of a high gas mine and a outburst mine. In recent years, with the innovation and development of technical equipment, the variable-diameter and cave-making integrated equipment becomes main technical equipment for pressure relief, permeability increase and gas extraction efficiency improvement in a coal seam. The diameter-variable cave-making device can be divided into a water jet type and a mechanical type at present, wherein the water jet type can be applied to a common hardness coal seam, and the mechanical type can be applied to a medium hardness coal seam. However, for soft coal seams, because the coal quality is soft, if water is adopted as a medium for drilling, accidents such as hole collapse, drill sticking and the like are easy to occur, so that at present, only air powder discharging and small hole drilling can be adopted for the coal seams, the construction process has large engineering quantity, the drilling quantity is dense, and the gas extraction efficiency is low.
Disclosure of Invention
The invention aims to solve at least one technical problem in the background technology and provides a double-channel variable-diameter hole making device.
In order to solve the above technical problems, the present invention provides a dual-channel variable-diameter cave creating device, comprising: the hole making device comprises a hole making rod body, a drill magazine connected with one end of the hole making rod body, and a drill tail connected with the other end of the hole making rod body, wherein the hole making rod body is provided with a first inner cavity, the drill magazine is provided with a second inner cavity, the drill tail is provided with a third inner cavity, and the first inner cavity is communicated with the second inner cavity;
the two-channel variable-diameter cave-making device further comprises: the device comprises a rack structure which reciprocates in the first inner cavity, and a knife swinging structure which is arranged on the hole making rod body, is meshed with the rack structure and swings under the driving of the rack structure.
According to an aspect of the invention, further comprising: the sealing seat is arranged in the first inner cavity and is in sliding connection with one end, close to the second inner cavity, of the rack structure.
According to an aspect of the invention, further comprising: and the elastic resetting structure is arranged in the third inner cavity and is abutted against the end part of the rack structure.
According to one aspect of the invention, the rack structure comprises a connecting portion slidably connected with the seal seat, a limiting portion connected with the connecting portion and having an outer wall slidably connected with an inner wall of the first inner cavity, an engaging portion connected with the limiting portion and having an outer wall provided with engaging teeth, and a limiting connecting portion connected with the engaging portion and the elastic return structure and having an outer wall slidably connected with the inner wall of the first inner cavity.
According to an aspect of the present invention, the rack structure has a channel structure including a medium inlet provided on an outer wall between the connecting portion and the stopper portion, a medium channel communicating with the medium inlet and located at the rack structure spindle, and a tapered outlet communicating with the medium channel.
According to one aspect of the invention, the elastic return structure comprises a spring seat supported in the third inner cavity and a spring supported on the spring seat and abutted against the limit connection part;
the spring seat comprises a supporting seat and a supporting rod which is supported on the supporting seat and is provided with a conical head structure matched with the conical outlet;
a medium outlet communicated with the third inner cavity is formed in the supporting seat;
the spring is disposed around the strut.
According to one aspect of the invention, the swing knife structure comprises a swing knife through groove arranged on the hole making rod body, a swing knife arm rotatably arranged in the swing knife through groove, and a half gear arranged at the end part of the swing knife arm and meshed with the meshing part to realize the swing of the swing knife arm.
According to one aspect of the invention, the sealing seat comprises a transfer end far away from the rack structure and extending into the second inner cavity and a mounting end fixedly connected with the inner wall of the first inner cavity;
the outer edge of the mounting end is provided with a through hole for communicating the first inner cavity and the second inner cavity or the outer edge of the mounting end is of a dentate structure;
the core of installation end be equipped with connecting portion sliding connection's spout, the switching end be equipped with the first medium passageway of spout intercommunication.
According to one aspect of the invention, an outer diameter of the transition end is smaller than an inner diameter of the second lumen.
According to one aspect of the invention, the limiting part is provided with a V-shaped groove which is communicated with or isolates the first inner cavities at two sides of the limiting part along with the movement of the rack structure.
According to one aspect of the invention, a first seal is arranged on the side wall of the sliding groove in sliding connection with the connecting portion, a second seal is arranged at the joint of the drill magazine and the hole making rod body, and a third seal is arranged at the joint of the drill tail and the hole making rod body.
According to the scheme of the invention, when normal drilling operation is carried out, the rear end of the drill storage is connected with the drill rod, and the front end of the drill tail is connected with the drill bit. The rack structure axially moves towards the direction of the sealing seat under the action of the spring until the end face of the rack structure is contacted with the end face of the sealing seat to form limiting; at the moment, a first medium is introduced into the drill rod connected through the drill magazine, enters a first inner cavity in the hole making rod body along a through hole gap between the hole making rod body and the sealing seat, and then passes through a medium inlet medium channel on the wall of the rack structure; when the rack structure moves to be in contact with the sealing seat, the conical head structure supported on the spring seat is separated from the end face conical outlet of the rack structure, a first medium can enter a cavity formed between the drill tail and the hole making rod body along an internal channel of the rack structure, and finally enters a drill bit at the front end of the drill tail through the medium outlet on the outer wall of the spring seat and the inner hole of the spring seat, so that the effect of cooling the drilling tool by discharging slag is achieved.
The tool swinging arm is arranged on the hole making rod body and can rotate around a rotating shaft arranged on the tool swinging arm to realize the opening and closing of the tool swinging arm; the bottom of the tool arm of the swing tool is of a tooth-shaped structure, namely, a half gear is arranged at the bottom and matched with the meshing part on the rack structure, and when the rack structure slides axially, the tool arm of the swing tool can rotate around a rotating shaft to realize the opening and closing of the tool arm; one end of the rack structure is of a cylindrical structure, is matched with a sealing seat fixed on the hole making rod body, can axially slide along the sealing seat, and limits the axial movement range of the rack structure through a connecting part and the end surface of the sealing seat; a spring seat and a spring are arranged between the end face of the rack structure, which is far away from the sealing seat, and the drill tail, and the rack structure can be pushed to the sealing seat along the rod body under the pushing of the spring force when high-pressure media are not introduced into the sealing seat, so that the tool arm of the swinging tool is closed; the spring seat base is of an internal hollow structure and can form a channel with the outside, the front end of the spring seat base is of a conical structure and can be matched with an inner conical structure (namely a conical outlet) of the rack structure close to the end face of the spring seat to seal the channel.
The seal receptacle is inside hollow structure (be equipped with first medium passageway promptly and rather than the spout of intercommunication), fixes on the body of rod inner wall, and the seal receptacle excircle is dentate structure, can guarantee when the seal receptacle is fixed coaxial with the body of rod of making the cave, can make the medium that gets into the brill storehouse again pass through the peripheral dentate joint of seal receptacle and get into the first inner chamber of the body of rod of making the cave inside.
When high-pressure medium is introduced into the sealing seat through the first medium channel, the high-pressure medium pushes the rack structure to overcome the thrust of the spring to move towards the spring seat, at the moment, the rack structure drives the swinging cutter arm to be opened, the conical structure at the front end of the spring seat is gradually closed with the end face inner conical structure of the rack structure, and the rack structure and the V-shaped groove matched with the inner wall of the hole making rod body are gradually exposed. The first medium enters a first inner cavity in the hole making rod body through the sealing seat and then is discharged through a V-shaped gap between the rack structure and the inner wall of the hole making rod body, and finally is discharged through a cutter swinging through groove in the hole making rod body. So set up, can be so that dispel the heat to pendulum sword structure through the medium, in time the effluvium at a large amount of heats that the working process produced pendulum sword structure, guarantee operating mass with high efficiency, improve device life.
According to the scheme of the invention, through the double-channel arrangement, the requirement of introducing media during normal drilling of equipment is met, a small-flow high-pressure medium can be used for driving the swing cutter arm to open when reaming operation is required, the swing cutter arm is opened more directly and reliably, a stop switch or a pressure maintaining device can be installed at a high-pressure medium feed inlet during reaming operation of the variable-diameter hole making device, and more energy is saved during reaming operation.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings which correspond to and are not to be construed as limiting the embodiments, in which elements having the same reference numeral designations represent like elements throughout, and in which the drawings are not to be construed as limiting in scale unless otherwise specified.
Fig. 1 schematically illustrates a closed state cross-sectional view of a dual channel variable diameter cavitation device in accordance with an embodiment of the present invention;
figure 2 schematically illustrates a cross-sectional view of a two-pass variable diameter cavitation device in an expanded state, according to one embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
Fig. 1 schematically illustrates a closed state cross-sectional view of a dual channel variable diameter cavitation device in accordance with an embodiment of the present invention; figure 2 schematically illustrates a cross-sectional view of a dual channel variable diameter cavitation device in an expanded state, according to one embodiment of the present invention. As shown in fig. 1 and 2, the dual channel variable diameter cavitation device according to the present invention includes: make cave body of rod 1, bore storehouse 2 of being connected with the one end (right-hand member in the picture) of making the cave body of rod 1, bore tail 3 of being connected with the other end (left end in the picture) of making the cave body of rod 1, make the cave body of rod 1 have first inner chamber 101, bore storehouse 2 and have second inner chamber 201, bore tail 3 and have third inner chamber 301, first inner chamber 101 and second inner chamber 201 intercommunication. Further, as shown in fig. 1 and 2, the dual-channel variable-diameter cavitation apparatus further includes: the rack structure 4 reciprocates in the first inner cavity 101, and the swinging knife structure 5 is arranged on the hole making rod body 1 and meshed with the rack structure 4 and driven by the rack structure 4 to swing.
Further, as shown in fig. 1 and 2, in the present embodiment, the two-channel variable-diameter cavitation device further includes: and the sealing seat 6 is arranged in the first inner cavity 101, and the sealing seat 6 is slidably connected with one end (the right end in the figure) of the rack structure 4 close to the second inner cavity 201.
Further, as shown in fig. 1 and 2, in the present embodiment, the dual-channel variable-diameter cavitation apparatus further includes: and the elastic resetting structure 7 is arranged in the third inner cavity 301 and is abutted with the end part of the rack structure 4.
In the present embodiment, the rack structure 4 includes a connecting portion 401 slidably connected to the seal holder 6, a stopper portion 402 connected to the connecting portion 401 and having an outer wall slidably connected to the inner wall of the first cavity 101, an engaging portion 403 connected to the stopper portion 402 and having an outer wall provided with engaging teeth, and a stopper connecting portion 404 connected to the engaging portion 403 and the elastic restoring structure 7 and having an outer wall slidably connected to the inner wall of the first cavity 101.
Further, in the present embodiment, the rack structure 4 has a channel structure 405, and the channel structure 405 includes a medium inlet 4051 provided on an outer wall between the connecting portion 401 and the stopper portion 402, a medium channel 4052 communicating with the medium inlet 4051 and located at a core shaft of the rack structure 4, and a tapered outlet 4053 communicating with the medium channel 4052.
Further, as shown in fig. 1 and 2, in the present embodiment, the elastic return structure 7 includes a spring seat 701 supported in the third inner cavity 301, and a spring 702 supported on the spring seat 701 and abutting against the limit connection portion 404. The spring seat 701 includes a support base 7011 and a strut 7012 supported on the support base 7011 and having a tapered head configuration that mates with the tapered outlet 4053. The supporting seat 7011 is provided with a medium outlet a communicated with the third inner cavity 301, and the spring is arranged around the supporting rod 7012.
Further, as shown in fig. 1 and 2, in the present embodiment, the pendulum knife structure 5 includes a pendulum knife through slot 501 provided on the hole making rod body 1, a pendulum knife arm 502 rotatably mounted in the pendulum knife through slot 501, and a half gear 503 provided at an end of the pendulum knife arm 502 and engaged with the engaging portion 403 to realize the swinging of the pendulum knife arm 502.
Further, as shown in fig. 1 and 2, in the present embodiment, the sealing seat 6 includes an adapting end 601 far from the rack structure 4 and extending into the second cavity 201, and a mounting end 602 fixedly connected with the inner wall of the first cavity 101. The outer edge of the mounting end 602 is provided with a through hole for communicating the first inner cavity 101 and the second inner cavity 201. The core of the mounting end 602 is provided with a slide groove 6021 slidably coupled to the coupling portion 401, and the adaptor end 601 is provided with a first medium passage 6011 communicating with the slide groove 6021. As shown in fig. 1 and 2, the outer diameter of the transit end 601 is smaller than the inner diameter of the second lumen 201.
Further, as shown in fig. 1 and 2, in the present embodiment, the stopper 402 is provided with V-shaped grooves 4021 that communicate with or isolate the first cavities 101 on both sides of the stopper 402 in accordance with the movement of the rack structure 4.
Further, as shown in fig. 1 and 2, in the present embodiment, a first seal b is disposed on a side wall of the sliding groove 6021 in sliding contact with the connecting portion 401, a second seal c is disposed at a joint of the drill magazine 2 and the hole making rod body 1, and a third seal is disposed at a joint of the drill tail 3 and the hole making rod body 1.
According to the arrangement of the invention, in fact, when normal drilling operation is carried out, the rear end of the drill magazine 2 is connected with a drill rod, and the front end of the drill tail 3 is connected with a drill bit. The rack structure 4 axially moves towards the sealing seat 6 under the action of the spring 702 until the end face of the rack structure 4 contacts with the end face of the sealing seat 6 to form limiting; at the moment, a first medium is introduced into the drill rod connected through the drill magazine 2, enters the first inner cavity 101 in the hole making rod body 1 along a through hole gap between the hole making rod body 1 and the sealing seat 6, and then passes through a medium inlet 4051 medium channel 4052 on the wall of the rack structure 4; when the rack structure 4 moves to contact with the sealing seat, the conical head structure supported on the spring seat 701 is separated from the end face conical outlet 4053 of the rack structure 4, a first medium can enter a cavity formed between the drill tail 3 and the hole making rod body 1 along an internal channel of the rack structure 4, and finally enters a drill bit at the front end of the drill tail through a medium outlet a on the outer wall of the spring seat and an inner hole of the spring seat, so that the effect of cooling the drilling tool by discharging slag is achieved.
Further, according to the above arrangement, the swinging knife arm 502 is mounted on the hole making rod body 1 and can rotate around the rotating shaft mounted on the swinging knife arm 502, so as to open and close the swinging knife arm 502; the bottom of the knife swinging arm 502 is of a tooth-shaped structure, namely a half gear 503 is arranged at the bottom and matched with the meshing part 403 on the rack structure 4, and when the rack structure 4 axially slides, the knife swinging arm 502 can rotate around a rotating shaft to realize the opening and closing of the knife arm; one end (right end in the figure) of the rack structure 4 is a cylindrical structure, is matched with a sealing seat fixed on the hole making rod body 1, can axially slide along the sealing seat 6, and limits the axial movement range of the rack structure 4 through the connecting part 401 and the end surface of the sealing seat 6; a spring seat 701 and a spring 702 are arranged between the end face of the rack structure 4 far away from the sealing seat 6 and the drill tail 3, and the rack structure 4 can be pushed towards the sealing seat 6 along the rod body under the pushing of the spring force when high-pressure media are not introduced into the sealing seat 6, so that the tool swinging arm 502 is closed; the base of the spring seat 701 is of an internal hollow structure and can form a channel with the outside, the front end of the spring seat 701 is of a conical structure and can be matched with an inner conical structure (namely a conical outlet) of the rack structure 4 close to the end face of the spring seat to seal the channel.
The seal receptacle 6 is an internal hollow structure (namely, is provided with a first medium channel and a chute communicated with the first medium channel), and is fixed on the inner wall of the rod body, and the outer circle of the seal receptacle 6 is of a toothed structure, so that the seal receptacle 6 can be ensured to be coaxial with the hole-making rod body 1 when being fixed, and a medium entering the drill magazine 2 can enter the first inner cavity 101 inside the hole-making rod body 1 through the toothed joint at the periphery of the seal receptacle 6.
Further, when a high-pressure medium is introduced into the sealing seat 6 through the first medium channel 6011, the high-pressure medium pushes the rack structure 4 to move toward the spring seat 701 against the pushing force of the spring 702, at this time, the rack structure 4 drives the swing tool arm 502 to open, the conical structure at the front end of the spring seat 701 is gradually closed with the end-face inner conical structure of the rack structure 4, and the V-shaped groove matching the rack structure 4 with the inner wall of the cavity creating rod body 1 is gradually exposed. After entering the first inner cavity 101 inside the hole making rod body 1 through the sealing seat 6, the first medium is discharged through the V-shaped gap between the rack structure 4 and the inner wall of the hole making rod body 1, and finally discharged through the knife arranging through groove 501 on the hole making rod body 1. So set up, can be so that dispel the heat to pendulum sword structure 5 through the medium, will pendulum sword structure 5 in time the effluvium of a large amount of heats that the course of the work produced, guarantee operating mass with rated load and efficiency, improve device life.
With the above arrangement, in practice, in order to prevent the high-pressure medium from flowing out when the swinging cutter arm 502 is opened, the first seal b is provided between the seal holder 6 and the end face of the rack structure 4. For avoiding first medium to flow through the gap of boring tail 3, making cave body of rod 1, 2 junctions of brill storehouse, set up the sealed c of second between boring storehouse 2 and making the cave body of rod 1, set up the sealed d of third between boring tail 3 and making the cave body of rod 1.
Further, in order to prevent the first medium entering the cavity between the drill tail 3 and the cavity creating rod body 1 when the cutter swinging arm 502 is closed from flowing out through the gap between the rack structure 4 and the cavity creating rod body 1, the fit gap between the boss (i.e., the limiting portion 402) of the preferred rack structure 4 and the cavity creating rod body 1 is small, or a sealing structure is added between the boss of the rack structure 4 and the inner wall of the cavity creating rod body 1.
In the invention, aiming at the diameter-variable cave-making construction of the soft coal seam, the preferred first medium is wind, the high-pressure medium is high-pressure water or high-pressure oil, wind is adopted to discharge powder during normal drilling, and the reaming operation enables trace high-pressure water to push the rack structure to move, so that the cutter swinging arm is opened, and meanwhile, the high-pressure water cannot leak, thereby not only avoiding the influence of the high-pressure water on the coal body, but also increasing a stop switch or a pressure maintaining device when the high-pressure water enters and exits, and greatly saving energy during the reaming operation.
Similarly, a one-way valve can be added at the front end of the drill tail according to experience, so that the phenomenon that the service life and the reliability of a mechanical device are influenced because the coal powder is blown into the variable-diameter cave-making device by the pressure inside a drill hole when a drill rod is additionally connected is avoided.
According to the scheme of the invention, through the double-channel arrangement, the requirement of introducing media during normal drilling of equipment is met, a small-flow high-pressure medium can be used for driving the swing tool arm to open when reaming operation is required, the swing tool arm is opened more directly and reliably, a stop switch or a pressure maintaining device can be installed at a high-pressure medium feed inlet during reaming operation of the variable-diameter hole making device, and more energy is saved during reaming operation.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, while the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (8)
1. But binary channels reducing cave device is made, its characterized in that includes: the hole making rod comprises a hole making rod body (1), a drill magazine (2) connected with one end of the hole making rod body (1), and a drill tail (3) connected with the other end of the hole making rod body (1), wherein the hole making rod body (1) is provided with a first inner cavity (101), the drill magazine (2) is provided with a second inner cavity (201), the drill tail (3) is provided with a third inner cavity (301), and the first inner cavity (101) is communicated with the second inner cavity (201);
the dual-channel variable-diameter cave-making device further comprises: the device comprises a rack structure (4) which moves in a reciprocating manner in the first inner cavity (101), and a swinging cutter structure (5) which is arranged on the hole making rod body (1), is meshed with the rack structure (4) and swings under the driving of the rack structure (4);
further comprising: the sealing seat (6) is arranged in the first inner cavity (101), and the sealing seat (6) is in sliding connection with one end, close to the second inner cavity (201), of the rack structure (4);
further comprising: the elastic resetting structure (7) is arranged in the third inner cavity (301) and is abutted against the end part of the rack structure (4);
the rack structure (4) is provided with a limiting part (402), and the limiting part (402) is provided with a V-shaped groove (4021) which is communicated with or isolates the two sides of the limiting part (402) along with the movement of the rack structure (4) and is used for the first inner cavity (101).
2. The dual channel variable-diameter cavitation device according to claim 1, wherein the rack structure (4) includes a connection portion (401) slidably connected to the seal seat (6), the stopper portion (402) connected to the connection portion (401) and having an outer wall slidably connected to an inner wall of the first inner cavity (101), an engagement portion (403) connected to the stopper portion (402) and having an outer wall provided with engaging teeth, and a stopper connection portion (404) connected to the engagement portion (403) and the elastic return structure (7) and having an outer wall slidably connected to the inner wall of the first inner cavity (101).
3. The dual channel variable diameter cavitation device according to claim 2, wherein the rack structure (4) has a channel structure (405), the channel structure (405) including a media inlet (4051) provided on an outer wall between the connecting portion (401) and the stopper portion (402), a media channel (4052) communicating with the media inlet (4051) and located at a spindle of the rack structure (4), and a tapered outlet (4053) communicating with the media channel (4052).
4. The dual channel variable diameter cavitation device according to claim 3, characterized in that the elastic return structure (7) includes a spring seat (701) supported in the third inner cavity (301) and a spring (702) supported on the spring seat (701) in abutment with the limit connection (404);
the spring seat (701) comprises a supporting seat (7011) and a strut (7012) which is supported on the supporting seat (7011) and is provided with a conical head structure matched with the conical outlet (4053) in a shape;
the supporting seat (7011) is provided with a medium outlet (a) communicated with the third inner cavity (301);
the spring is disposed around the strut (7012).
5. The double-channel variable-diameter hole making device as claimed in claim 4, wherein the swing cutter structure (5) comprises a swing cutter through groove (501) arranged on the hole making rod body (1), a swing cutter arm (502) rotatably mounted in the swing cutter through groove (501), and a half gear (503) arranged at the end of the swing cutter arm (502) and meshed with the meshing portion (403) to realize the swing of the swing cutter arm (502).
6. The dual-channel variable-diameter cavitation device as claimed in claim 5, characterized in that the sealing seat (6) comprises an adapter end (601) which is far away from the rack structure (4) and extends into the second inner cavity (201) and a mounting end (602) which is fixedly connected with the inner wall of the first inner cavity (101);
a through hole for communicating the first inner cavity (101) with the second inner cavity (201) is arranged on the outer edge of the mounting end (602) or the outer edge of the mounting end is of a tooth-shaped structure;
the core part of the mounting end (602) is provided with a sliding groove (6021) connected with the connecting part (401) in a sliding manner, and the transfer end (601) is provided with a first medium channel (6011) communicated with the sliding groove (6021).
7. The dual channel variable diameter cavitation device of claim 6, characterized in that the outer diameter of the transition end (601) is smaller than the inner diameter of the second lumen (201).
8. The two-channel variable-diameter hole making device according to claim 7, wherein a first seal (b) is arranged on a side wall of the sliding groove (6021) in sliding connection with the connecting part (401), a second seal (c) is arranged at a joint of the drill magazine (2) and the hole making rod body (1), and a third seal (d) is arranged at a joint of the drill tail (3) and the hole making rod body (1).
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| CN202110537878.9A CN113107402B (en) | 2021-05-18 | 2021-05-18 | Double-channel variable-diameter cave-making device |
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| CN202110537878.9A CN113107402B (en) | 2021-05-18 | 2021-05-18 | Double-channel variable-diameter cave-making device |
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| CN113107402B true CN113107402B (en) | 2023-01-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113137181A (en) * | 2021-05-26 | 2021-07-20 | 河南能源化工集团研究总院有限公司 | Hydraulic reaming drilling tool and reaming method |
| CN113846971B (en) * | 2021-09-29 | 2024-03-29 | 河南能源化工集团研究总院有限公司 | Mechanical hydraulic drilling and hole-making integrated device and operation method |
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