CN219654696U - Quick drilling bit device for drilling hard rock stratum - Google Patents
Quick drilling bit device for drilling hard rock stratum Download PDFInfo
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- CN219654696U CN219654696U CN202322119541.3U CN202322119541U CN219654696U CN 219654696 U CN219654696 U CN 219654696U CN 202322119541 U CN202322119541 U CN 202322119541U CN 219654696 U CN219654696 U CN 219654696U
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- 238000005553 drilling Methods 0.000 title claims abstract description 73
- 239000011435 rock Substances 0.000 title claims abstract description 57
- 238000009527 percussion Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000005755 formation reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 230000033001 locomotion Effects 0.000 abstract description 6
- 239000002002 slurry Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a rapid drilling bit device for drilling a hard rock stratum. The device for quickly drilling the hard rock stratum drilling bit enables the rotary bit to keep relative rotation movement with the primary sleeve in the drilling process through the rotary connecting unit, and meanwhile drives the primary sleeve to move forwards; a sleeve mounting hole is formed in the rotary drill bit along the axis, an impact sleeve is arranged in the sleeve mounting hole, high-pressure gas is provided in the impact chamber by using an impact chamber arranged on the impact sleeve, and the impact drill bit is driven to linearly move along the impact guide cylinder to impact and fracture hard rock in front of a drilled hole; stopping the action of the impact drill bit after the rock impact fracture is completed, and simultaneously, pressing the impact drill bit on the upper end surface of the rotary drill bit through the first air passage and the second air passage; the drill rod rotates to drive the rotary drill bit to rotate, so that broken rock is peeled.
Description
Technical Field
The utility model relates to the technical field of tunnel engineering, in particular to a rapid drilling bit device for drilling hard rock stratum.
Background
Along with the increasing requirements of tunnel engineering on the stability of surrounding rock of a rock stratum after drilling, the requirements on rock stratum drilling bits are also increased more and more, so that higher engineering expectations are expected.
Currently, the drill bit for rock formation drilling is mainly a single drill bit, for example, a column tooth drill bit which is mainly used for rock breaking engineering of various mines, traffic, water conservancy, roadways, tunneling, quarrying, municipal construction and the like, and is used for dry and wet drilling of medium hard rock; the straight drill bit is suitable for drilling rock holes with the diameter below 50 mm and drilling low-hardness rocks.
And to the drilling of hard stratum, traditional single drill bit has the problem such as drilling inefficiency, drilling rate are slow, and the layer is peeled in the drilling process, when facing the great hard stratum of bulk strength, the drill bit difficulty of marcing, very big influence the construction progress.
Thus, there is a need to provide a solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
It is an object of the present utility model to provide a fast drilling bit assembly for hard rock drilling that solves or alleviates the above-mentioned problems of the prior art.
In order to achieve the above object, the present utility model provides the following technical solutions:
the utility model provides a rapid drilling bit device for drilling hard rock stratum, which comprises the following components: the drilling module, the primary casing pipe and the connecting drill rod; the drilling module includes: the rotary drill bit, the rotary connecting unit, the percussion drill bit, the percussion sleeve and the percussion guide cylinder; the rotary drill bit is in a truncated cone shape, the bottom surface of the rotary drill bit is provided with a mounting groove, and a through sleeve mounting hole is formed along the axis; the rotary connecting unit is arranged in the mounting groove, and the impact sleeve is tightly matched in the sleeve mounting hole; the rotary connection unit includes: the device comprises two rotating rings, fixing rings and steel balls, wherein the two rotating rings are symmetrically arranged on two sides of the fixing rings respectively, rotating sliding grooves are formed in the end faces of the rotating rings, which are opposite to the fixing rings, and a plurality of steel balls are arranged in the rotating sliding grooves; wherein the outer side wall of the rotating ring is tightly matched with the mounting groove; the impact sleeve is provided with an impact chamber with an upper end opening and a lower end closed, the upper end face is provided with a guide mounting groove extending downwards along the axial direction, the lower end face is provided with a first air passage and a second air passage extending upwards along the axial direction, the upper ends of the first air passage and the second air passage are respectively communicated with the impact chamber, the upper end opening of the first air passage is close to the bottom of the guide mounting groove, and the upper end opening of the second air passage is close to the bottom of the impact chamber; the impact guide cylinder is in threaded connection with the guide mounting groove, and a plurality of guide grooves are formed in the inner side wall of the impact guide cylinder; the percussion drill bit includes: the bottom of the impact head is connected with the impact rod, the side wall of the impact rod is provided with a guide boss matched with the guide groove, the lower end of the impact rod penetrates through the impact guide cylinder and then penetrates into the impact cavity, and the lower end of the impact rod is connected with an impact piston; wherein the impact piston is located below the first air passage and above the second air passage; the outer side wall of the primary sleeve is connected with the inner side wall of the fixed ring, the upper end of the connecting drill rod is detachably connected with the lower end of the impact sleeve, and the connecting drill rod is coaxially sleeved in the primary sleeve.
Preferably, the bottom of rotary drill bit can be dismantled and is connected with and compress tightly the end cover, the up end that compresses tightly the end cover is provided with and compresses tightly the boss, compress tightly the boss along the axial top rotary connection unit.
Preferably, a distance between an upper end of the first air passage and an upper end of the second air passage is smaller than a length of the guide groove and smaller than a length of the guide boss.
Preferably, a plurality of the guide grooves are uniformly distributed along the circumferential direction of the impact guide cylinder, and the cross section of each guide groove is rectangular.
Preferably, a threaded counter bore is formed in the upper end of the connecting drill rod, and the threaded counter bore is in threaded connection with the lower end of the impact sleeve.
Preferably, a threaded boss is arranged at the lower end of the connecting drill rod, and the threaded boss is matched with the threaded counter bore.
Preferably, the connecting drill rod is further provided with a first air passing hole and a second air passing hole, the first air passing hole and the second air passing hole are all communicated along the axial direction of the connecting drill rod, the first air passing hole is matched with the first air passage, and the second air passing hole is matched with the second air passage.
Preferably, the method further comprises: the upper end of the secondary sleeve is connected with the lower end of the primary sleeve in a threaded manner, and a plurality of outer liquid spraying holes are formed in the outer tube of the primary sleeve and the side wall of the outer tube of the secondary sleeve; wherein the upper end of the primary sleeve is closed, and the lower end of the primary sleeve is open; the upper end of the secondary sleeve is provided with an opening, the lower end of the secondary sleeve is provided with a liquid passing hole along the axial direction, and the liquid passing hole is positioned between the outer pipe and the inner pipe of the secondary sleeve.
The beneficial effects are that:
in the device for quickly drilling the hard rock stratum drilling provided by the embodiment of the utility model, the rotary drill bit is in a shape of a circular truncated cone, the bottom surface of the rotary drill bit is provided with the mounting groove, and the rotary connecting unit is arranged in the mounting groove; the rotary connection unit includes: the device comprises two rotating rings, fixed rings and steel balls, wherein the two rotating rings are symmetrically arranged on two sides of the fixed rings respectively, the end faces of the rotating rings, which are opposite to the fixed rings, are provided with rotating sliding grooves, and a plurality of steel balls are arranged in the rotating sliding grooves; wherein, the outer side wall of the rotating ring is tightly matched with the mounting groove; the outer side wall of the first-stage sleeve is connected with the inner side wall of the fixed ring. Therefore, the rotary drill bit and the primary sleeve keep relative rotary motion in the drilling process through the rotary connecting unit, and meanwhile, the primary sleeve is driven to move forwards.
A through sleeve mounting hole is formed in the rotary drill along the axis, and an impact sleeve is tightly matched in the sleeve mounting hole; the impact sleeve is provided with an impact chamber with an opening at the upper end and a closed lower end, the upper end face is provided with a guide mounting groove extending downwards along the axial direction, and the lower end face is provided with a first air passage and a second air passage extending upwards along the axial direction; the impact guide cylinder is in threaded connection in the guide mounting groove, and a plurality of guide grooves are formed in the inner side wall. The lateral wall of the impact rod in the impact drill bit is provided with a guide boss matched with the guide groove, the lower end of the impact rod penetrates through the impact guide cylinder and then goes deep into the impact cavity, and the lower end of the impact rod is connected with an impact piston. The rotary drill bit is provided with a sleeve mounting hole along the axis, an impact sleeve is arranged in the sleeve mounting hole, high-pressure gas is provided in the impact chamber by a first air passage and a second air passage by utilizing the impact chamber arranged on the impact sleeve, and the impact drill bit is driven to linearly move along the impact guide cylinder so as to impact and crack hard rock in front of a drill hole; stopping the action of the impact drill bit after the rock impact fracture is completed, and simultaneously, pressing the impact drill bit on the upper end surface of the rotary drill bit through the first air passage and the second air passage; the drill rod rotates to drive the rotary drill bit to rotate, so that broken rock is peeled.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:
FIG. 1 is a schematic illustration of a construction of a fast drilling bit apparatus for hard formation drilling according to some embodiments of the present utility model;
FIG. 2 is a cross-sectional view of the rapid drilling bit assembly for drilling hard formations shown in FIG. 1;
FIG. 3 is a partial view at A in FIG. 2;
FIG. 4 is a schematic view of a drilling module provided in accordance with some embodiments of the present disclosure;
FIG. 5 is a cross-sectional view of the drilling module shown in FIG. 4;
FIG. 6 is a schematic illustration of a rotary drill bit provided in accordance with some embodiments of the present utility model;
FIG. 7 is a cross-sectional view of the rotary drill bit of FIG. 6;
fig. 8 is a schematic structural view of a rotary connection unit provided according to some embodiments of the present utility model;
FIG. 9 is a schematic structural view of an impingement sleeve provided according to some embodiments of the present utility model;
FIG. 10 is a schematic structural view of an impact guide cartridge provided according to some embodiments of the present disclosure;
fig. 11 is a schematic view of a construction of a percussion drill bit according to some embodiments of the utility model.
Reference numerals illustrate:
1. a drilling module; 2. a primary sleeve; 3. connecting a drill rod; 4. a secondary sleeve;
101. rotating the drill bit; 102. a rotary connection unit; 103. percussion drill bits; 104. an impingement sleeve; 105. an impact guide cylinder; 106. compressing the end cover;
111. a mounting groove; 121. a sleeve mounting hole;
112. a fixing ring; 122. a rotating ring; 132. A steel ball;
113. a guide boss;
114. an impulse chamber; 124. a guide mounting groove; 134. a first airway; 144. a second airway;
115. and a guide groove.
Detailed Description
The utility model will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the utility model and not limitation of the utility model. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present utility model without departing from the scope or spirit of the utility model. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present utility model encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.
In order to overcome the problems that a single drill bit drills slowly into a hard rock stratum and the drilling efficiency is low at present, the utility model provides a drill bit device for drilling the hard rock stratum, and the construction flow of first cracking and then drilling is implemented on the hard rock stratum through the coordination and the coordination of a percussion drill bit and rotary drilling, so that the drilling efficiency of the hard rock stratum is greatly improved; when the drill bit drills into the rock stratum, the slurry pump is started, slurry passes through the annular sleeve, and the outer liquid spraying holes on the annular sleeve are used for injecting liquid into the rock stratum, so that the stability of surrounding rock is effectively improved.
As shown in fig. 1 to 11, the rapid drilling bit apparatus for drilling hard rock includes: a drilling module 1, a primary casing 2, a connecting drill rod 3 and a secondary casing 4. The drilling module 1 is driven by the connecting drill rod 3 to break and drill hard rock strata, so that the construction efficiency of the hard rock strata is improved, the hole wall is grouting reinforced after the drill bit is pushed by the annular primary sleeve 2 and the annular secondary sleeve 4 which are connected to the drilling module 1, and the stability of surrounding rock is improved.
The drilling module 1 comprises: rotary drill bit 101, rotary connection unit 102, percussion drill bit 103, percussion sleeve 104, and percussion guide cylinder 105. Wherein, the rotary drill 101 is in a shape of a round table, the bottom surface is provided with a mounting groove 111, and a through sleeve mounting hole 121 is arranged along the axis; the rotary connection unit 102 is installed in the installation groove 111. Specifically, the rotary connection unit 102 includes: the rotary ring 122, the fixed ring 112 and the steel balls 132, the rotary ring 122 is two, the two rotary rings 122 are symmetrically arranged on two sides of the fixed ring 112 respectively, the end faces of the rotary ring 122 opposite to the fixed ring 112 are provided with rotary sliding grooves, and a plurality of steel balls 132 are arranged in the rotary sliding grooves. The outer sidewall of the rotating ring 122 is tightly fitted with the mounting groove 111; retaining ring 112 is coupled (e.g., welded or threaded) to the outer tube of the primary sleeve such that there is relative rotational movement between rotary drill bit 101 and primary sleeve 2 is able to move forward with rotary drill bit 101. Further, the bottom of rotary drill bit 101 is detachably connected with a compression end cover 106, and the upper end surface of compression end cover 106 is provided with a compression boss, and the compression boss pushes up rotary connection unit 102 along the axial direction.
The sleeve mounting hole 121 is tightly fitted with the impact sleeve 104; the impact sleeve 104 is provided with an impact chamber 114 with an upper end opening and a lower end being closed, the upper end face is provided with a guide mounting groove 124 extending downwards along the axial direction, the lower end face is provided with a first air passage 134 and a second air passage 144 extending upwards along the axial direction, the upper ends of the first air passage 134 and the second air passage 144 are respectively communicated with the impact chamber 114, the upper end opening of the first air passage 134 is close to the bottom of the guide mounting groove 124, and the upper end opening of the second air passage 144 is close to the bottom surface of the impact chamber 114.
The guide mounting groove 124 is internally and threadedly connected with the impact guide cylinder 105, and a plurality of guide grooves 115 are formed on the inner side wall of the impact guide cylinder 105; the side wall of the impact rod of the impact drill bit 103 is provided with a guide boss 113 matched with the guide groove 115, the lower end of the impact rod penetrates through the impact guide cylinder 105 and then goes deep into the impact chamber 114, and the lower end of the impact rod is connected with an impact piston; the impulse piston is located below the first air passage 134 and above the second air passage 144. Thereby, high pressure gas is supplied into the percussion chamber 114 through the first air passage 134 and the second air passage 144, and the percussion piston is driven to move along the axial direction, so that the percussion drill bit 103 is driven to break the hard rock layer.
Further, the first air passage 134 and the second air passage 144 are respectively connected to a pressure valve, and the effective control of the impact motion of the impact piston is achieved by controlling the opening pressure of the pressure valve. For example, by setting the opening pressure of the pressure valve, the impact piston is made to perform a certain pressure buffering, avoiding the impact of the impact piston with the impact guide cylinder 105.
In the process that the impact piston drives the impact drill bit 103 to break the rock, the structural relationship among the first air passage 134, the second air passage 144, the guide groove 115 and the guide boss 113 is utilized, specifically, the distance between the upper end of the first air passage 134 and the upper end of the second air passage 144 is smaller than the length of the guide groove 115 and smaller than the length of the guide boss 113, so that the stroke of the impact piston in the impact chamber 114 is effectively controlled, the possible collision between the impact piston and the impact guide cylinder 105 is further avoided, and the service life of components is prolonged.
To further enhance the breaking action of the percussion bit 103 against hard rock, the percussion head of the percussion bit 103 is cone-shaped, the radial dimension of the bottom surface of the percussion head being matched with the radial dimension of the top surface of the rotary drill bit 101, whereby not only is the impact effect of the percussion bit 103 against rock effectively enhanced, but also the percussion bit 103 and the rotary drill bit 101 are provided with the same radial dimension at the joint surface, which is advantageous for enhancing the peeling effect of the rotary drill bit 101 against rock during the rotary movement.
When rotary drill bit 101 is rotated to strip compression, impact drill bit 103 is pressed on the upper end surface of rotary drill bit 101 through first air passage 134 and second air passage 144, and impact sleeve 104 is driven by rotation of connecting drill rod 3, so that rotary acting force is transmitted to rotary drill bit 101 to rotate, and broken rock is stripped. In the process, the impact drill 103 is driven to rotate together by the cooperation of the guide grooves 115 in the impact guide cylinder 105 and the guide bosses 113 on the impact rod. Specifically, a plurality of guide grooves 115 are uniformly distributed along the circumferential direction of the impact guide cylinder 105, and the cross section of the guide grooves 115 is rectangular, whereby the rotation force is transmitted to the impact drill 103 by the cooperation of the rectangular cross section of the guide grooves 115 and the guide bosses 113, driving the impact drill 103 to rotate together.
In the utility model, a threaded counter bore is arranged at the upper end of a connecting drill rod 3, and the threaded counter bore is in threaded connection with the lower end of an impact sleeve 104; the lower end of the connecting drill rod 3 is provided with a threaded boss, and the threaded boss is matched with the threaded counter bore, so that effective connection between the impact sleeve 104 and the connecting drill rod 3, connection between different connecting drill rods 3 and power transmission are realized.
On connecting the drilling rod 3, still be provided with first gas pocket and second gas pocket that crosses, first gas pocket and second gas pocket all link up along the axial of connecting the drilling rod 3, first gas pocket and first air flue 134 looks adaptation, second gas pocket and second air flue 144 looks adaptation. Thereby, a transfer of high pressure gas in the axial direction of the connecting rod 3 to the impulse chamber 114 is achieved. Further, in order to ensure the gas sealing effect between the different connecting drill rods 3, sealing gaskets can be additionally arranged between the impact sleeve 104 and the connecting drill rods 3 and between the different connecting drill rods 3, or a sealing structure can be designed.
When the drill bit drills into the rock stratum, the slurry pump is started, slurry passes through the annular sleeve, and the outer liquid spraying holes on the annular sleeve are used for injecting liquid into the rock stratum, so that the stability of surrounding rock is effectively improved. Specifically, the upper end of the secondary sleeve 4 is in threaded connection with the lower end of the primary sleeve 2, and a plurality of outer liquid spraying holes are formed in the outer tube of the primary sleeve 2 and the side wall of the outer tube of the secondary sleeve 4; the upper end of the primary sleeve 2 is closed, and the lower end is open; the upper end of the secondary sleeve 4 is opened, the lower end is axially provided with a liquid passing hole, and the liquid passing hole is positioned between the outer pipe and the inner pipe of the secondary sleeve 4. Thereby, the slurry is conveyed into the annular sleeve through the liquid through hole, and the slurry is injected into the rock stratum through the outer liquid spraying port on the outer pipe of the annular sleeve (the primary sleeve 2 and the secondary sleeve 4) under the driving of the slurry pump, so that the rock stratum is reinforced.
In the utility model, through the rotary connection unit 102, the rotary drill bit 101 keeps relative rotary motion with the primary sleeve in the drilling process, and meanwhile, the primary sleeve is driven to move forwards; the impact sleeve 104 is provided with an impact chamber 114, high-pressure gas is supplied into the impact chamber 114, the impact drill bit 103 is driven to linearly move along the impact guide cylinder 105, and the hard rock in front of the drilling hole is subjected to impact fracture; stopping the action of the percussion bit 103 after the rock impact fracture is completed, and simultaneously, pressing the percussion bit 103 on the upper end surface of the rotary drill bit 101; the rotation of the drill rod drives the rotary drill bit 101 to rotate, so that the broken rock is peeled.
Therefore, the construction flow of first cracking and then drilling is carried out on the hard rock stratum through the coordination of the percussion bit 103 and the rotary drilling, so that the drilling efficiency of the hard rock stratum is greatly improved; when the drill bit drills into the rock stratum, a slurry pump is started, slurry passes through the annular sleeve, and grouting reinforcement is carried out on the hole wall after the drill bit is pushed by an outer liquid spraying hole on the annular sleeve, so that the stability of surrounding rock is effectively improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. A rapid drilling bit assembly for drilling hard formations comprising: the drilling module, the primary casing pipe and the connecting drill rod;
the drilling module includes: the rotary drill bit, the rotary connecting unit, the percussion drill bit, the percussion sleeve and the percussion guide cylinder;
the rotary drill bit is in a truncated cone shape, the bottom surface of the rotary drill bit is provided with a mounting groove, and a through sleeve mounting hole is formed along the axis; the rotary connecting unit is arranged in the mounting groove, and the impact sleeve is tightly matched in the sleeve mounting hole;
the rotary connection unit includes: the device comprises two rotating rings, fixing rings and steel balls, wherein the two rotating rings are symmetrically arranged on two sides of the fixing rings respectively, rotating sliding grooves are formed in the end faces of the rotating rings, which are opposite to the fixing rings, and a plurality of steel balls are arranged in the rotating sliding grooves; wherein the outer side wall of the rotating ring is tightly matched with the mounting groove;
the impact sleeve is provided with an impact chamber with an upper end opening and a lower end closed, the upper end face is provided with a guide mounting groove extending downwards along the axial direction, the lower end face is provided with a first air passage and a second air passage extending upwards along the axial direction, the upper ends of the first air passage and the second air passage are respectively communicated with the impact chamber, the upper end opening of the first air passage is close to the bottom of the guide mounting groove, and the upper end opening of the second air passage is close to the bottom of the impact chamber;
the impact guide cylinder is in threaded connection with the guide mounting groove, and a plurality of guide grooves are formed in the inner side wall of the impact guide cylinder;
the percussion drill bit includes: the bottom of the impact head is connected with the impact rod, the side wall of the impact rod is provided with a guide boss matched with the guide groove, the lower end of the impact rod penetrates through the impact guide cylinder and then penetrates into the impact cavity, and the lower end of the impact rod is connected with an impact piston; wherein the impact piston is located below the first air passage and above the second air passage;
the outer side wall of the primary sleeve is connected with the inner side wall of the fixed ring, the upper end of the connecting drill rod is detachably connected with the lower end of the impact sleeve, and the connecting drill rod is coaxially sleeved in the primary sleeve.
2. The rapid drilling bit device for drilling hard rock according to claim 1, wherein the bottom of the rotary drill bit is detachably connected with a compression end cover, an upper end surface of the compression end cover is provided with a compression boss, and the compression boss axially abuts against the rotary connection unit.
3. The rapid drilling bit assembly for hard rock drilling of claim 1, wherein a distance between an upper end of the first air passage and an upper end of the second air passage is less than a length of the guide groove and less than a length of the guide boss.
4. The rapid drilling bit assembly for hard rock drilling of claim 1, wherein a plurality of the guide grooves are uniformly distributed along the circumference of the impact guide cylinder, and the guide grooves have a rectangular cross section.
5. The rapid drilling bit assembly for drilling hard strata as claimed in claim 1 wherein the upper end of said connecting rod is provided with a threaded counterbore which is threadedly connected to the lower end of said impingement sleeve.
6. The rapid drilling bit assembly for hard rock drilling of claim 5, wherein the lower end of the connecting rod is provided with a threaded boss, the threaded boss being matched with the threaded counterbore.
7. The rapid drilling bit device for drilling hard rock according to claim 1, wherein the connecting drill rod is further provided with a first air passing hole and a second air passing hole, the first air passing hole and the second air passing hole are all penetrated along the axial direction of the connecting drill rod, the first air passing hole is matched with the first air passage, and the second air passing hole is matched with the second air passage.
8. The rapid drilling bit assembly for hard rock drilling of claim 1, further comprising: the upper end of the secondary sleeve is connected with the lower end of the primary sleeve in a threaded manner, and a plurality of outer liquid spraying holes are formed in the outer tube of the primary sleeve and the side wall of the outer tube of the secondary sleeve; wherein the upper end of the primary sleeve is closed, and the lower end of the primary sleeve is open; the upper end of the secondary sleeve is provided with an opening, the lower end of the secondary sleeve is provided with a liquid passing hole along the axial direction, and the liquid passing hole is positioned between the outer pipe and the inner pipe of the secondary sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322119541.3U CN219654696U (en) | 2023-08-08 | 2023-08-08 | Quick drilling bit device for drilling hard rock stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322119541.3U CN219654696U (en) | 2023-08-08 | 2023-08-08 | Quick drilling bit device for drilling hard rock stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219654696U true CN219654696U (en) | 2023-09-08 |
Family
ID=87857725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322119541.3U Active CN219654696U (en) | 2023-08-08 | 2023-08-08 | Quick drilling bit device for drilling hard rock stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219654696U (en) |
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2023
- 2023-08-08 CN CN202322119541.3U patent/CN219654696U/en active Active
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