CN219472026U - Large-diameter tower type hydraulic pulse integrated hole drill bit device - Google Patents
Large-diameter tower type hydraulic pulse integrated hole drill bit device Download PDFInfo
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- CN219472026U CN219472026U CN202320722290.5U CN202320722290U CN219472026U CN 219472026 U CN219472026 U CN 219472026U CN 202320722290 U CN202320722290 U CN 202320722290U CN 219472026 U CN219472026 U CN 219472026U
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- drill bit
- transmission shaft
- cylinder shell
- hollow transmission
- hydraulic pulse
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a large-diameter tower type hydraulic pulse integrated pore-forming drill bit device, which comprises a hollow transmission shaft coaxially arranged at the front end of a drill rod, wherein the front end of the hollow transmission shaft is coaxially connected with a tower type drill bit with a small front part and a large rear part through a hydraulic pulse assembly; the utility model provides stable pulse water flow, converts pressure pulse generated by water hammer action into dynamic and static impact load acting on coal rock, is beneficial to crushing of the coal rock and cleaning of drill cuttings, reduces stress of a drill bit, simultaneously reduces the temperature of the drill bit, realizes one-step forming of drilling and reaming, and avoids a phenomenon of hole collapse caused by large-scale loosening of one-step hole forming of large-diameter drilling. And the drilling efficiency and the construction reliability are improved.
Description
Technical Field
The utility model belongs to the technical field of coal seam large-diameter drilling, and particularly relates to a large-diameter tower type hydraulic pulse integrated hole-forming drill bit device.
Background
The coal seam gas pre-pumped by drilling is used as one of main measures for preventing coal and gas from protruding, and has wide application in the coal mine industry in China. At present, the diameter of a common extraction drilling hole applied underground in coal mines in China is 75-120mm, and the loosening range is about 2 m. The research shows that the adoption of the large-diameter drilling drainage method can effectively improve the gas pre-drainage rate of the low-permeability coal seam, achieve a good drainage effect and reduce the engineering quantity. In order to improve the extraction effect, part of high-gas mines and protruding mines begin to adopt large-diameter (more than 400mm in diameter) gas extraction drilling holes, after the diameter of the extraction drilling holes is increased, the range of loose rings around the holes is greatly increased, and higher requirements are put forward on drilling tools and modes. In addition, in the construction process of the gas extraction drilling hole, the natural stress balance state of the Kong Zhoumei rock mass is broken, and when the stress value exceeds the strength limit or the yield limit of the rock mass, surrounding rock mass can be damaged, and the hole collapse phenomenon is easy to occur to cause safety accidents. When the drilling tool is drawn back, the collapsed coal also can cause the blockage of the pore canal, thereby affecting the drawing back of the drilling tool. And the drill bit needs to be repeatedly replaced in the large-diameter drilling construction process, so that the consumption of the drilling tool is large. There is therefore a need for improvements to the current drill bits to address the above-mentioned problems.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides the large-diameter tower type hydraulic pulse integrated hole drilling bit device which has the advantages of simple structure, hole drilling and expanding at one time and high safety and reliability. The drill bit is assembled step by step in a step manner, so that loose rings of surrounding rock mass are cleaned step by step in the process of large-diameter drilling operation, and the occurrence of hole collapse is reduced; and the corresponding drill bit can be replaced according to actual conditions, so that the consumption of drilling tools is reduced. Meanwhile, the hydraulic pulse assembly is integrated into the tower type drill bit to form a device suitable for large-diameter drilling construction of the coal seam, the tower type drill bit is assisted to drill through pulse hydraulic pressure, and the drilling efficiency is improved.
In order to solve the technical problems, the utility model adopts the following technical scheme: the large-diameter tower type hydraulic pulse integrated pore-forming drill bit device comprises a hollow transmission shaft coaxially arranged at the front end of a drill rod, wherein the front end of the hollow transmission shaft is coaxially connected with a tower type drill bit with a small front part and a large rear part through a hydraulic pulse assembly;
the tower drill bit comprises a central shaft, a high-pressure jet nozzle is arranged at a front port of the central shaft, at least two layers of drill bit assemblies are arranged on the outer circle of the central shaft along the axial direction at intervals, each layer of drill bit assembly comprises a disc, three long mounting plates are uniformly arranged on the front surface of the disc along the circumferential direction, the length direction of each mounting plate is along the radial direction of the disc, three cutter heads are fixedly arranged on each mounting plate along the length direction, the directions of the cutter edges of the cutter heads are consistent with the rotation direction, a connecting block is arranged between every two adjacent cutter heads, and the cutter heads of every two adjacent layers of drill bit assemblies are staggered along the circumferential direction of a hollow transmission shaft.
The hydraulic pulse assembly comprises a cylinder shell with a cylinder cavity inside, a piston for dividing the cylinder cavity into a front hydraulic cavity and a rear pneumatic cavity is slidably arranged inside the cylinder shell, the outer circle of the rear part of the cylinder shell stretches into a front port of an inner hole of a hollow transmission shaft and is in threaded connection with the front port of the hollow transmission shaft, a pulse valve positioned inside the hollow transmission shaft is arranged at the rear end of the cylinder shell, a water inlet pipe joint is arranged at the front side part of the cylinder shell, a check valve is arranged on the water inlet pipe joint, the front end of the cylinder shell is open and integrally connected with a conical joint with a small front part and a big rear part, a through conical hole and an internal threaded hole are sequentially formed in the conical joint from back to front, and the rear end of a central shaft of the tower drill bit stretches into and is in threaded connection with the internal threaded hole.
The inner circle of the cylinder shell is provided with a rear limiting ring at the rear side of the rear air pressure cavity, the inner circle of the cylinder shell is provided with a front limiting ring at the front side of the front water pressure cavity, the center of the rear side face of the piston is provided with a spring, and the length of the spring is longer than the distance from the rear limiting ring to the rear end face of the cylinder shell.
The outer circle of the rear end of the hollow transmission shaft extends into and is in threaded connection with the inside of the front end opening of the drill rod.
A plurality of junk slots are uniformly formed in the circumferential edge of the front side surface of the disc, and the directions of the junk slots are consistent with the rotation direction of the drill bit assembly.
By adopting the technical scheme, the utility model has the following technical effects:
(1) According to the utility model, by arranging the drill bit components with different diameters, the coal and rock are drilled step by step in the construction process of large-diameter drilling, so that the one-step forming of drilling and reaming is realized, and the phenomenon of hole collapse caused by large-range loose rings generated by one-step hole forming of large-diameter drilling is avoided. And the drilling efficiency and the construction reliability are improved.
(2) The utility model sets the included angle between the vertical surface at the outermost side of the mounting plate and the horizontal surface at the top as an acute angle, and the whole of the mounting plate and the cutter head mounted on the mounting plate is inclined. The tool bit on the multilayer drill bit subassembly is from top to bottom along the crisscross setting of circumferencial direction, and the tool bit of front end plays the guide effect to the drilling, and disc leading flank edge sets up the junk slot simultaneously. And the drilling efficiency is improved.
(3) The drill bit assembly and the central shaft can adopt an easily-detachable structure, for example, the disc of the drill bit assembly is sleeved on the central shaft and transmits rotary torque through the spline structure, and the disc is axially positioned through the compression of the nut, so that the drill bit assembly can be independently replaced according to the needs of different drilling holes, and the waste caused by one-time integral replacement is avoided.
(4) The inside central through-hole that sets up of center pin, by the water injection of central through-hole to the coal seam during drilling, utilize the drilling work of the supplementary drill bit of hydraulic pulse subassembly, provide stable pulse rivers, change the pressure pulse that the effect produced into the dynamic and static impact load that acts on the coal petrography, be favorable to the breakage of coal petrography and the clearance of drill chip, reduce the atress of drill bit, cool down the drill bit simultaneously, prolong the life of drill bit, improve broken rock ability.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a top view of the front-most layer drill bit assembly of FIG. 1;
fig. 3 is a schematic structural view of a hydraulic pulse assembly.
Description of the embodiments
As shown in fig. 1, 2 and 3, the large-diameter tower type hydraulic pulse integrated hole drilling bit device comprises a hollow transmission shaft 3 coaxially arranged at the front end of a drill rod 4, wherein the front end of the hollow transmission shaft 3 is coaxially connected with a tower type drill bit 1 with a small front part and a big rear part through a hydraulic pulse assembly 2;
the tower type drill bit 1 comprises a central shaft 5, a high-pressure jet spray nozzle 6 is arranged at the front end opening of the central shaft 5, three layers of drill bit components are arranged at the outer circle of the central shaft 5 along the axial direction at intervals, each layer of drill bit component comprises a disc 7, the diameters of the three layers of discs 7 from front to back are respectively 200mm, 300mm and 400mm, three long mounting plates 8 are uniformly arranged on the front surface of each disc 7 along the circumferential direction, three cutter heads 9 are fixedly arranged on each mounting plate 8 along the longitudinal direction along the radial direction of the disc 7, the blade directions of the cutter heads 9 are consistent with the rotation direction, a connecting block 10 is arranged between two adjacent cutter heads 9, and the cutter heads 9 of the two adjacent layers of drill bit components are staggered along the circumferential direction of a hollow transmission shaft 3.
The hydraulic pulse assembly 2 comprises a cylinder shell 11 with a cylinder cavity inside, a piston 14 which divides the cylinder cavity into a front hydraulic cavity 12 and a rear pneumatic cavity 13 is slidably arranged inside the cylinder shell 11, the outer circle of the rear part of the cylinder shell 11 stretches into and is in threaded connection with the front end opening of an inner hole of the hollow transmission shaft 3, the rear end of the cylinder shell 11 is provided with a pulse valve 15 positioned inside the hollow transmission shaft 3, the front side part of the cylinder shell 11 is provided with a water inlet pipe joint 16, the water inlet pipe joint 16 is provided with a check valve 17, the front end of the cylinder shell 11 is open and is integrally connected with a conical joint 18 with a small front part and a big rear part, a through conical hole 19 and an inner threaded hole 20 are sequentially formed inside the conical joint 18 from the rear to the front, and the rear end of a central shaft 5 of the tower drill bit 1 stretches into and is in threaded connection with the inner threaded hole 20.
The inner circle of the cylinder shell 11 is provided with a rear limiting ring 21 at the rear side of the rear air pressure cavity 13, the inner circle of the cylinder shell 11 is provided with a front limiting ring 22 at the front side of the front water pressure cavity 12, the center of the rear side surface of the piston 14 is provided with a spring 23, and the length of the spring 23 is longer than the distance from the rear limiting ring 21 to the rear end surface of the cylinder shell 11.
The outer circle of the rear end of the hollow transmission shaft 3 extends into and is in threaded connection with the inside of the front port of the drill rod 4.
A plurality of junk slots 24 are uniformly formed in the circumferential edge of the front side surface of the disc 7.
When the utility model is in use, the water supply pipe is connected with the water inlet pipe joint 16, the high-pressure air source supplies high-pressure air flow to the pulse valve 15 through the inner hole of the drill rod 4, the drill rod 4 rotates to supply power to the transmission shaft, the water pump is started to open the water valve, water enters the front water pressure cavity 12 through the water source inlet, the high-pressure air flow is injected into the rear air pressure cavity 13 through the pulse valve 15, the piston 14 is pushed to move forwards, the piston 14 reciprocates to inject the pulse water source into the central through hole through the conical joint 18, and finally the pulse water source is sprayed forwards through the high-pressure jet nozzle 6 to act on coal rock to assist the tower drill bit 1 to drill, and meanwhile, the water flow cools the drill bit. During drilling operation, the tool bit 9 on the drill bit assembly at the forefront is firstly contacted with the coal seam to perform drilling operation, the tool bit 9 of the drill bit assembly at the middle is used for reaming holes drilled at the front, the tool bit 9 of the drill bit assembly at the rearmost is used for reaming holes drilled by the drill bit assembly at the middle, progressive drilling is realized, drilling and reaming are performed at one time, and the junk slots 24 are convenient for discharging the drilled coal rocks.
The high-pressure air flow of the hydraulic pulse assembly 2 is powered by an air valve, and the piston 14 is driven by reciprocating motion to axially reciprocate to form pulse water flow, so that a water source is flushed into the high-pressure water jet assembly; a check valve 17 is arranged on the water inlet pipe joint 16 to prevent water source from flowing back; the spring 23 is arranged on the piston 14 to relieve the large impact on the rear limiting ring 21 when the piston 14 moves backwards, so that the piston 14 or the rear limiting ring 21 is prevented from being damaged; the front limit ring 22 and the rear limit ring 21 limit plates control and limit the reciprocating position of the piston 14.
The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.
Claims (5)
1. The utility model provides a tower hydraulic pulse of major diameter integrative pore-forming drill bit device which characterized in that: the drill rod comprises a hollow transmission shaft coaxially arranged at the front end of a drill rod, wherein the front end of the hollow transmission shaft is coaxially connected with a tower drill bit with a small front part and a big rear part through a hydraulic pulse assembly;
the tower drill bit comprises a central shaft, a high-pressure jet nozzle is arranged at a front port of the central shaft, at least two layers of drill bit assemblies are arranged on the outer circle of the central shaft along the axial direction at intervals, each layer of drill bit assembly comprises a disc, three long mounting plates are uniformly arranged on the front surface of the disc along the circumferential direction, the length direction of each mounting plate is along the radial direction of the disc, three cutter heads are fixedly arranged on each mounting plate along the length direction, the directions of the cutter edges of the cutter heads are consistent with the rotation direction, a connecting block is arranged between every two adjacent cutter heads, and the cutter heads of every two adjacent layers of drill bit assemblies are staggered along the circumferential direction of a hollow transmission shaft.
2. The large diameter tower hydraulic pulse integrated hole drill bit device according to claim 1, wherein: the hydraulic pulse assembly comprises a cylinder shell with a cylinder cavity inside, a piston for dividing the cylinder cavity into a front hydraulic cavity and a rear pneumatic cavity is slidably arranged inside the cylinder shell, the outer circle of the rear part of the cylinder shell stretches into a front port of an inner hole of a hollow transmission shaft and is in threaded connection with the front port of the hollow transmission shaft, a pulse valve positioned inside the hollow transmission shaft is arranged at the rear end of the cylinder shell, a water inlet pipe joint is arranged at the front side part of the cylinder shell, a check valve is arranged on the water inlet pipe joint, the front end of the cylinder shell is open and integrally connected with a conical joint with a small front part and a big rear part, a through conical hole and an internal threaded hole are sequentially formed in the conical joint from back to front, and the rear end of a central shaft of the tower drill bit stretches into and is in threaded connection with the internal threaded hole.
3. The large diameter tower hydraulic pulse integrated hole drill bit device according to claim 2, wherein: the inner circle of the cylinder shell is provided with a rear limiting ring at the rear side of the rear air pressure cavity, the inner circle of the cylinder shell is provided with a front limiting ring at the front side of the front water pressure cavity, the center of the rear side face of the piston is provided with a spring, and the length of the spring is longer than the distance from the rear limiting ring to the rear end face of the cylinder shell.
4. A large diameter tower hydraulic pulse integrated hole drill bit apparatus according to claim 1 or 2 or 3, characterized in that: the outer circle of the rear end of the hollow transmission shaft extends into and is in threaded connection with the inside of the front end opening of the drill rod.
5. A large diameter tower hydraulic pulse integrated hole drill bit apparatus according to claim 1 or 2 or 3, characterized in that: a plurality of junk slots are uniformly formed in the circumferential edge of the front side surface of the disc, and the directions of the junk slots are consistent with the rotation direction of the drill bit assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320722290.5U CN219472026U (en) | 2023-04-04 | 2023-04-04 | Large-diameter tower type hydraulic pulse integrated hole drill bit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320722290.5U CN219472026U (en) | 2023-04-04 | 2023-04-04 | Large-diameter tower type hydraulic pulse integrated hole drill bit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219472026U true CN219472026U (en) | 2023-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320722290.5U Active CN219472026U (en) | 2023-04-04 | 2023-04-04 | Large-diameter tower type hydraulic pulse integrated hole drill bit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219472026U (en) |
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2023
- 2023-04-04 CN CN202320722290.5U patent/CN219472026U/en active Active
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