CN212105723U - Reverse circulation impact device with guide structure - Google Patents

Abstract

The utility model relates to a reverse circulation percussion device with guide structure, a serial communication port, including the base member for bind two at least impacter subassemblies, guide structure is including the guide bar of locating the base member intermediate position, guide bar one end is equipped with the top connection, and the top connection is used for connecting the rig, the impacter subassembly is including locating the inside impacter monomer of base member, with the drill bit of connection can be dismantled to impacter monomer one end, the guide bar lower extreme is located drill bit end portion below for the pre-drilling bottom hole. The application provides a reverse circulation percussion device with guide structure for the skew can not take place for the hole center of boring, and the straightness that hangs down not only reaches the drilling construction standard, can also avoid the drilling construction energy consumption increase.

Description

Reverse circulation impact device with guide structure

Technical Field

The utility model belongs to the technical field of the core bores gets technical field and specifically relates to a reverse circulation strikes device with guide structure.

Background

The down-the-hole drill is a construction engineering device for piling holes, is suitable for engineering blast hole drilling operations such as metallurgy, coal, building materials, railways, hydropower construction, national defense construction, earthwork and the like, has the characteristics of deep drilling, large drilling diameter, high drilling efficiency, wide application range and the like compared with common rock drills, and is a currently universal large-scale rock drilling device.

During drilling construction in some bedrock environments, because construction drilling diameter is big, construction environment stratum is complicated, the adaptability of single drill bit detritus mode to stratum is poor, consequently, this kind of construction often drilling speed is slow, can not satisfy the needs of the whole efficiency of construction of engineering, in order to deal with the drilling construction demand of this kind of large-bore construction environment, the drilling tool that carries out the combination with a plurality of impactors and drill bit has appeared on the market, this kind of drilling tool make full use of strikes and has moved the efficient characteristics of carrying broken hard rock, drilling efficiency has greatly been improved.

However, when the hole to be drilled is deep, especially under the condition that the depth and the diameter of the hole are large, the center of the hole can deviate to a certain degree, so that the drilled hole is poor in verticality, and along with the fact that the deviation of the verticality is larger and larger, the drilled hole cannot reach the construction standard, and the energy consumption of drilling construction is increased.

SUMMERY OF THE UTILITY MODEL

The technical problem is solved, an object of the utility model is to provide a reverse circulation strikes device with guide structure for the skew can not take place at the hole center of boring, and it is good to hang down straightness, not only reaches drilling construction standard, can also avoid the drilling construction energy consumption increase.

The technical scheme of the utility model as follows:

a reverse circulation impact device with a guide structure comprises a base body for binding at least two impactor components,

the guide structure comprises a guide rod arranged in the middle of the base body;

one end of the guide rod is provided with an upper joint which is used for connecting a drilling machine,

the impactor assembly includes an impactor body disposed within the base,

a drill bit detachably connected with one end of the impactor monomer,

the lower end of the guide rod is located below the end part of the drill bit and used for pre-drilling a bottom hole.

Preferably, the guide rod comprises a guide surface, and an included angle between the guide surface and the horizontal plane is less than 90 degrees

Preferably, the end surface of the guide rod and the guide surface are provided with wear-resistant layers.

Preferably, the end of the guide rod is provided with drill teeth.

Preferably, the impactor body is fixed to the base body by a first joint,

the base body comprises an upper connecting disc,

a first vent hole is arranged in the axial direction perpendicular to the first joint, one end of the first vent hole is communicated with a first central hole in the first joint, and the other end of the first vent hole is communicated with a second vent hole in the upper flange;

the first center hole is communicated with a second center hole arranged in the impactor single body.

Preferably, an airflow groove is arranged on the lower end part of the base body and is communicated with the second central hole,

and the airflow groove is communicated with a slag discharge groove arranged in the base body so as to discharge rock slag from the slag discharge groove.

Preferably, the first joint is circumferentially provided with an arc-shaped ring groove, and the arc-shaped ring groove is communicated with the first vent hole.

Preferably, the impactor body comprises a check valve with one end matched with the first central hole,

a gas distribution seat which is abutted against the other end of the check valve,

a piston which is matched with the air distribution seat,

a first air chamber arranged between the piston and the air distribution seat,

a second air chamber arranged at the piston and the end part of the drill bit,

the piston reciprocates up and down through the change of the air pressure in the first air chamber and the second air chamber, and then impacts the drill bit, so that the drill bit impacts the rock stratum.

The utility model provides a reverse circulation impact device with a guide structure, which comprises a base body, at least two impactor components are bound in the base body, each impactor component comprises an impactor single body arranged in the base body, one end of each impactor single body is connected with a drill bit, the middle position of the base body is provided with the guide rod, the lower end of the guide rod is positioned below the end part of the drill bit, when the drilling construction is carried out, the guide rod is firstly contacted with the rock stratum, thus, a bottom hole is formed when the drilling is carried out, then the high-pressure gas on the drilling machine is transferred to the single impacter through the upper joint, the high-pressure gas in the single impacter makes the drill bit impact the rock stratum, the drilling machine makes the impact device rotate, and then drive the base member and the impacter monomer and the drill bit inside the base member to rotate simultaneously for the rock receives impact force and rotatory cutting force, reaches the purpose that the rock is broken, accomplishes heavy-calibre drilling construction work. The guide bar drills out the bottom hole in the stratum in advance for whole percussion device can not be because of the load is too big in the twinkling of an eye, perhaps local atress is too big and lead to the hole center of drilling to take place the skew, and when the construction, whole percussion device constantly uses the bottom hole that the guide bar bored to constantly bore as the center, makes the hole center of drilling can not take place the skew, and the straightness that hangs down reaches drilling construction standard. In case drilling takes place the skew, and percussion device takes place the friction with the hole lateral wall, continues to bore again, and the rig just need output bigger kinetic energy, and the energy consumption of drilling construction increases, consequently, the reverse circulation percussion device who has guide structure that this application provided can also avoid the big problem of drilling construction energy consumption.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a reverse circulation impact device with a guide structure in the present embodiment;

FIG. 2 is a schematic structural view of a reverse circulation impact device with a guide structure in the present embodiment;

FIG. 3 is a schematic structural diagram of a single impactor body in the present embodiment;

FIG. 4 is a schematic view of a first joint structure in this embodiment;

FIG. 5 is a schematic view of the upper connecting plate structure in the present embodiment;

fig. 6 is a schematic view of the internal structure of the impactor body in this embodiment.

Reference numbers in the drawings illustrate: 1. a substrate; 2. an impactor assembly; 3. an impactor single body; 4. a drill bit; 5. a first joint; 8. a first vent hole; 9. a second vent hole; 10. an arc-shaped ring groove; 11. an upper flange; 14. an air flow groove; 15. a slag discharge groove; 17. a guide bar; 18. an upper joint; 19. a guide surface; 20. a first central aperture; 21. a second central aperture; 31. a check valve; 32. a gas distribution base; 33. a piston; 34. a first air chamber; 35. a second air chamber.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 protection scope of the present application.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

As shown in fig. 1 to fig. 6, the utility model provides a reverse circulation percussion device with a guiding structure, which comprises a base body 1, at least two percussion devices 2 are bound inside the base body 1, each percussion device 2 comprises a percussion device single body 3 arranged inside the base body 1, one end of each percussion device single body 3 is connected with a drill bit 4, the guiding structure comprises a guiding rod 17 arranged in the middle of the base body 1, because the lower end of the guiding rod 17 is positioned below the end part of the drill bit 4, during drilling construction, the guiding rod 17 is firstly contacted with a rock stratum, thus, during drilling, a bottom hole is formed, and further, high-pressure gas on a drilling machine is transmitted to the percussion device single body 3 through an upper joint 18, and high-pressure gas in the percussion device single body 3 causes the drill bit 4 to impact the rock stratum, the drilling machine causes the percussion device to rotate, and further drives the base body 1 and the percussion device single body 3 and the drill, so that the rock is subjected to impact force and rotary cutting force, the aim of breaking the rock is fulfilled, and the large-caliber drilling construction work is completed. The guide rod 17 drills out the bottom hole in the rock stratum in advance, so that the whole impact device cannot deviate due to excessive instantaneous load or excessive local stress, the whole impact device always drills by taking the bottom hole drilled by the guide rod 17 as the center when in construction, the drilled hole center cannot deviate, the verticality is good, and the drilling construction standard is reached. In case drilling takes place the skew, and percussion device takes place the friction with the hole lateral wall, continues to bore again, and the rig just need output bigger kinetic energy, and the energy consumption of drilling construction increases, consequently, the reverse circulation percussion device who has guide structure that this application provided can also avoid the big problem of drilling construction energy consumption.

Further, the guide bar 17 comprises a guide surface 19, the guide surface 19 making an angle of less than 90 ° with the horizontal plane. When the drill bit is hard during drilling, the guide rod 17 is subjected to instantaneous impact load, the guide rod 17 is subjected to impact force, and the guide rod 17 is deviated within a small range, and in order to reduce the resistance of the guide rod 17 to drilling into the rock formation, the guide surface 19 is designed to form an included angle of less than 90 degrees with the horizontal plane, preferably, the included angle is more than 20 degrees and less than 75 degrees. Under the same drilling force, the contact surface of the guide rod 17 and the rock stratum is reduced, the pressure borne by the rock stratum is increased, so that the guide rod 17 can drill the bottom hole more easily, and on the other hand, the guide surface 19 plays a guiding role to accelerate the discharge speed of rock slag drilled in the bottom hole, so that the rock slag is not easy to gather at the bottom of the guide rod 17.

Further, be equipped with the wearing layer on the terminal surface of guide bar 17 and the spigot surface 19, when boring into harder stratum, the terminal surface and the spigot surface 19 of guide bar 17 can be worn and torn to the detritus sediment, seriously, the detritus takes place the extrusion with guide bar 17, make to produce recess and bellying on the guide bar 17, this bellying can cause the bottom hole aperture to be big partially, perhaps unsatisfactory, consequently, be equipped with the wearing layer on the terminal surface of guide bar 17 and spigot surface 19, can make the bottom hole aperture of boring unanimous, and the life of guide bar 17 has been improved, reduce percussion device's maintenance cost.

Wherein, the end of the guide rod 17 is provided with drill teeth, and the end of the guide rod 17 is provided with drill teeth, so that the instantaneous rotary cutting force of the impact device entering a rock stratum can be improved, and the stress of the guide rod 17 is reduced.

Further, impact its monomer and fix on base member 1 through first joint 5, base member 1 includes flange 11, and perpendicular to first joint 5 axial is upwards equipped with first air vent 8, and the one end of first air vent 8 communicates with first centre bore 20 on the first joint 5, and the other end of first air vent 8 communicates with the inside second air vent 9 of flange 11, and first centre bore 20 communicates with the inside second centre bore 21 of locating impacter monomer 3. When high-pressure gas is input into the central hole of the upper connecting disc 11, the second vent hole 9 is perpendicular to the central hole of the upper connecting disc 11, the high-pressure gas flows to the second vent hole 9 from the central hole of the upper connecting disc 11, then enters the first vent hole 8, then enters the first central hole 20 on the first connector 5, and finally enters the second central hole 21 inside the impactor single body 3 from the first central hole 20, so that through the airflow distribution structure, the high-pressure gas is divided through the second vent hole 9 and distributed to each impactor single body 3, the high-pressure gas entering the impactor single body 3 is converted into kinetic energy to impact the drill bit 4, and the purpose of breaking rocks is achieved.

The airflow groove 14 is arranged at the lower end of the base body 1, the airflow groove 14 is communicated with the second central hole 21, and the airflow groove 14 is communicated with the slag discharging groove 15 arranged in the base body 1, so that rock slag is discharged from the slag discharging groove 15.

The utility model provides an impact device has the difference of work essence with traditional binding type impacter, and traditional binding type impacter is to turn into kinetic energy with high-pressure gas, and behind the garrulous rock was hit to percussion bit 4, discharge in the impacter again, will hit garrulous rock and blow all around to the impacter, is collected the garrulous rock by catching the dirt device again. According to the impact device provided by the application, the airflow groove 14 is arranged at the lower end part of the base body 1, the airflow groove 14 is communicated with the second center hole 21, high-pressure gas flows to the airflow groove 14 through the second center hole 21, the high-pressure gas flows to the slag discharge groove 15 in the base body 1 through the airflow groove 14, the high-pressure gas is accumulated in the airflow groove 14 after being blown out from the impact device single body 3, the side wall of the airflow groove 14 is in arc-shaped smooth connection, the discharged high-pressure gas forms cyclone in the airflow groove 14, the cyclone drives crushed rocks to move into the slag discharge groove 15, and the slag discharge groove 15 is arranged in the base body 1, so that the whole slag discharge is discharged from the inside of the large-caliber binding type reverse circulation impact device, the slag discharge mode is called reverse circulation, and is different from the normal circulation slag discharge working mechanism of the traditional impact device, and the rock slag discharge from the outside of the traditional impact device is in the normal circulation.

Wherein, be equipped with arc annular 10 on the first joint 5 circumference, arc annular 10 and first air vent 8 intercommunication. When high-pressure gas reaches the impactor body 3 through each first vent hole 8, the gas flow circulates in the arc-shaped annular groove 10, preferably, a plurality of first vent holes 8 are arranged, so that the gas flow enters each first vent hole 8 after flowing in the arc-shaped annular groove 10, compared with the design that only one first vent hole 8 is arranged, the flow speed of the high-pressure gas to the central hole of the impactor body 3 is improved, meanwhile, because the high-pressure gas has certain pressure and is high in flow speed, when only one first vent hole 8 is arranged, the high-pressure gas cannot rapidly enter the impactor body 3 to be converted into kinetic energy and accumulates near the first joint 5, the pressure load borne by the first joint 5 is increased, the first joint 5 is easy to deform, therefore, the speed of the high-pressure gas reaching the impactor body 3 is increased by arranging a plurality of first vent holes 8, the first joint 5 can be prevented from being deformed due to stress, and the service life of the first joint 5 is prolonged.

The impactor body 3 comprises a check valve 31 with one end matched with the first central hole 20, an air distribution seat 32 abutted against the other end of the check valve 31, a piston 33 matched with the air distribution seat 32, a first air chamber 34 arranged between the piston 33 and the air distribution seat 32, a second air chamber 35 arranged at the end part of the piston 33 and the end part of the drill bit 4, and the air pressure in the first air chamber 34 and the second air chamber 35 is changed to realize the up-and-down reciprocating motion of the piston 33, so that the drill bit 4 is impacted, and the rock stratum is impacted by the drill bit 4. How the high-pressure gas enters the impactor body 3 to impact the rock formation is specifically, at the beginning, the check valve 31 is matched with the first central hole 20 of the first joint 5, the high-pressure gas of the drilling machine is distributed to flow to each first joint 5 through the upper joint 18 and the upper connecting disc 11 and then flows to the first central hole 20, the high-pressure gas acts on the check valve 31 to apply pressure to the check valve 31, the check valve 31 moves downwards, so that the check valve 31 is not matched with the first central hole 20, because one end of the check valve 31 is abutted against the gas distribution seat 32, when the high-pressure gas reaches the second gas chamber 35, the gas pressure in the second gas chamber 35 is greater than the gas pressure in the first gas chamber 34, the piston 33 is pushed to move upwards, when the piston 33 moves to the gas distribution seat 32 and is matched, the gas pressure in the first gas chamber 34 is increased, at the moment, the gas pressure in the first gas chamber 34 is greater than the gas pressure in the second gas chamber 35, the gas pressure in the first gas, the end of the piston 33 applies an impact force to the end of the drill bit 4 and the drill bit 4 performs an impact motion downward.

When drilling a deep hole, the instantaneous load borne by the impact device in the prior art is overlarge, so that the center of the impact device deviates, namely, an included angle is formed between the center of the impact device and the vertical line direction, and the outer side of the reverse circulation impact device rubs with the side wall of a rock stratum along with the deeper depth of the drilled hole, so that the problem of poor verticality of the drilled hole is caused. The straightness of straightness poor that hangs down in hole not only makes the hole of drilling not reach the construction standard, can also need overcome the produced frictional force between impact device outer wall and the rock stratum lateral wall for drilling construction energy consumption increases, still can influence reverse circulation impact device's life simultaneously.

Before the drill bit 4 applies impact force to the rock stratum, the guide rod 17 on the end of the base body 1 is in contact with the rock stratum, the drill applies rotary power to the reverse circulation impact device with the guide structure, and the guide rod 17 performs rotary cutting movement, so that a bottom hole is drilled in the rock stratum. Meanwhile, when the drill bit 4 impacts the rock stratum, the drill bit also rotates, the 17-shaped pre-drilled bottom hole of the guide rod is used as the center, and the drilling teeth on the drill bit 4 cut the rock stratum to drill the hole, so that the diameter of the hole is continuously enlarged. In order to save labor in drilling the bottom hole, drilling teeth can be arranged at the end part of the guide rod 17; in order to reduce the instant pressure of the guide rod 17 contacting with the rock stratum, a guide surface 19 can be arranged on the guide rod 17, so that the bottom of the guide rod 17 is in a sharp angle, the reverse impact born by the guide rod 17 is reduced, meanwhile, the arrangement of the guide surface 19 can also be used as the guide of rock slag, the discharge of the rock slag is accelerated, and the crushed rock slag is prevented from being accumulated at the bottom of a bottom hole; in order to increase the wear resistance of the guide rod 17, a wear layer can be provided on the end face of the guide rod 17 and the guide surface 19.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A reverse circulation impact device with a guide structure is characterized by comprising a base body used for binding at least two impactor components,

the guide structure comprises a guide rod arranged in the middle of the base body;

one end of the guide rod is provided with an upper joint which is used for connecting a drilling machine,

the impactor assembly includes an impactor body disposed within the base,

a drill bit detachably connected with one end of the impactor monomer,

the lower end of the guide rod is located below the end part of the drill bit and used for pre-drilling a bottom hole.

2. The reverse circulation impact device with guide structure of claim 1, wherein the guide bar comprises a guide surface that makes an angle of less than 90 ° with the horizontal.

3. The reverse circulation impact device with the guide structure according to claim 2, wherein the end surface of the guide rod and the guide surface are provided with wear resistant layers.

4. The reverse circulation impact device with guide structure according to claim 3, wherein the end of the guide rod is provided with drill teeth.

5. The reverse circulation impact device with guide structure according to claim 1,

the impactor body is fixed on the base body through a first joint,

the base body comprises an upper connecting disc,

a first vent hole is arranged in the axial direction perpendicular to the first joint, one end of the first vent hole is communicated with a first central hole in the first joint, and the other end of the first vent hole is communicated with a second vent hole in the upper flange;

the first center hole is communicated with a second center hole arranged in the impactor single body.

6. The reverse circulation impact device with guide structure according to claim 5,

an airflow groove is arranged at the lower end part of the base body and is communicated with the second central hole,

and the airflow groove is communicated with a slag discharge groove arranged in the base body so as to discharge rock slag from the slag discharge groove.

7. The reverse circulation impact device with guide structure according to claim 6,

the first joint is circumferentially provided with an arc-shaped annular groove, and the arc-shaped annular groove is communicated with the first vent hole.

8. The reverse circulation impact device with guide structure according to claim 5,

the impactor body comprises a check valve with one end matched with the first central hole,

a gas distribution seat which is abutted against the other end of the check valve,

a piston which is matched with the air distribution seat,

a first air chamber arranged between the piston and the air distribution seat,

a second air chamber arranged at the piston and the end part of the drill bit,

the piston reciprocates up and down through the change of the air pressure in the first air chamber and the second air chamber, and then impacts the drill bit, so that the drill bit impacts the rock stratum.

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