CN212454266U - Variable-diameter pyramid type drilling and powder discharging pressure relief device - Google Patents
Variable-diameter pyramid type drilling and powder discharging pressure relief device Download PDFInfo
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- CN212454266U CN212454266U CN202021296160.2U CN202021296160U CN212454266U CN 212454266 U CN212454266 U CN 212454266U CN 202021296160 U CN202021296160 U CN 202021296160U CN 212454266 U CN212454266 U CN 212454266U
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- 239000000843 powder Substances 0.000 title claims abstract description 103
- 238000007599 discharging Methods 0.000 title claims abstract description 60
- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 239000000178 monomer Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000003245 coal Substances 0.000 abstract description 15
- 238000005065 mining Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 56
- 230000036346 tooth eruption Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a powder release device is arranged in drilling of variable diameter pyramid type belongs to coal mining or metal mine exploitation drilling release field. The drill bit comprises a pressure relief connecting rod and a powder discharge pressure relief drill bit, wherein the powder discharge pressure relief drill bit is arranged at the front end of the pressure relief connecting rod, the tail end of the pressure relief connecting rod is connected with a drill rod, and the powder discharge pressure relief drill bit comprises a crushing exhaust tooth cutting part, a loading and unloading tooth cutting part and a spiral powder discharge end cover part which are sequentially connected; the crushing exhaust cutting pick part comprises a crushing exhaust cutting pick body, axial crushing teeth, radial cutting pick I and air guide holes are respectively arranged on the crushing exhaust cutting pick body, the detachable cutting pick part is formed by sequentially connecting a plurality of groups of detachable cutting pick monomers, the powder discharging cutting pick monomers are arranged in a triangular prism shape for convenience, the powder discharging end cover part comprises a powder discharging end cover body in a spiral manner, and a powder discharging groove and an air inlet hole are formed in the powder discharging end cover body in the spiral manner. The utility model discloses can be under the high-pressure gas effect, the drilling in-process can realize arranging powder fast, creeps into fast in the target area.
Description
Technical Field
The utility model relates to a coal mining or metal mine mining variable diameter pyramid type drilling release field, concretely relates to powder pressure relief device is arranged in drilling.
Background
Compared with shallow mining, deep mining of coal and rock bodies is more complex in stress environment, and the frequency and the strength of rock burst are obviously increased under the action of high stress, strong mining disturbance and complex geological structures. At present, the research on rock burst obtains abundant research results, but the rock burst is still a difficult problem for coal mine science and technology workers due to the 'opacity' of underground rock mass and uncertainty of stress environment where the underground rock mass is located.
Aiming at the problems, a great deal of progress is made by many scholars in the current research of comprehensive control of rock burst, and guarantee is provided for safe mining of coal. The drilling pressure relief technology aims at an effective local active danger relieving measure for preventing and controlling coal mine rock burst, can avoid high stress concentration and improve the medium property of a coal rock mass so as to weaken the capacity of accumulating elastic energy. The drilling pressure relief method in the coal body or rock body is favored by coal mine enterprises due to the advantages of high efficiency, low cost, good pressure relief effect and the like.
However, the existing pressure relief device still has certain defects in field use, which mainly show that the rigidity and the stability of a drill bit in the pressure relief device are not enough; the dust can not be discharged in a dry manner, so that the powder discharging efficiency is not high; the single structural design of drill bit can't satisfy complicated rock mass release needs. Meanwhile, the effective powder discharging space of the original drill bit connected with the advancing type full-automatic controllable reducing pressure relief connecting rod is lower, and effective dry-type powder discharging cannot be realized. Therefore, the research and development of a pressure relief drill bit which can ensure dry powder discharge in a drill hole and can aim at complicated rock mass structure change becomes an urgent problem to be solved at the present stage.
The related research reports in the prior art mainly include:
CN204060516U discloses a dry type internal powder discharge drill bit, which mainly adopts a powder discharge hole on a drill bit body to discharge dry powder, the drill bit body of the device is cylindrical, and the drill bit body is parallel to a rock wall in a rock body, and an effective powder discharge space cannot be formed, so that the powder discharge efficiency of the drill bit is low, and the drill bit cannot be applied to a forward full-automatic controllable reducing pressure relief connecting rod.
CN108979549B discloses a dry-type interior row powder drill bit, mainly adopts spiral cutting sword and through-hole to realize the discharge of dry powder, and this drill bit end can't satisfy the needs to the rock breakage, can cause the massive rock mass to block up the drilling, makes it only be applicable to the drilling in the soft rock mass, and spiral cutting sword intensity is lower simultaneously, causes the drill bit poor stability.
In summary, the test device in the prior art has not realized the problem that the structure of the drill bit can be changed for complex rock masses, and has not solved the problems of rapid powder discharge and rapid drilling, so related researchers in the field are dedicated to developing a variable-diameter pyramid-shaped drilling powder discharge pressure relief device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a variable-diameter pyramid-shaped drilling and powder discharging pressure relief device which can realize quick powder discharging and quick drilling in a target area in the drilling process under the action of high-pressure gas; aiming at different rock mass environments, the self structure is further selectively changed by combining the tensile strength of the coal body or the rock mass, and further the rapid powder discharge and drilling of pressure relief drilling are accelerated.
In order to achieve the above object, the utility model discloses required technical problem who solves lies in: the drill bit capable of rapidly drilling and rapidly discharging powder is provided.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a variable-diameter pyramid-shaped drilling and powder discharging pressure relief device comprises a pressure relief connecting rod and a powder discharging pressure relief drill bit, wherein the powder discharging pressure relief drill bit is installed at the front end of the pressure relief connecting rod, the tail end of the pressure relief connecting rod is connected with a drill rod required in a drilling process, and the powder discharging pressure relief drill bit comprises a crushing exhaust tooth intercepting part, a loading and unloading tooth intercepting part and a spiral powder discharging end cover part which are sequentially connected from front to back;
the crushing exhaust cutting pick part comprises a crushing exhaust cutting pick body, wherein an axial crushing tooth, a radial cutting pick I and an air guide hole are respectively arranged on the crushing exhaust cutting pick body, the radial cutting pick I is distributed on the periphery of the crushing exhaust cutting pick body in a triangular prism shape, the axial crushing tooth is positioned at the front end of the crushing exhaust cutting pick body, and the air guide hole is positioned at the central position of the crushing exhaust cutting pick body;
the detachable cutting tooth part is formed by sequentially connecting a plurality of groups of detachable cutting tooth monomers, wherein each group of detachable cutting tooth monomers comprises a detachable cutting tooth main body, a radial cutting tooth II is arranged on the detachable cutting tooth main body, the radial cutting tooth II is distributed on the periphery of the detachable cutting tooth main body in a triangular prism shape, and an exhaust hole is formed in the detachable cutting tooth main body;
the spiral powder discharging end cover part comprises a spiral powder discharging end cover main body, a spiral powder discharging groove and an air inlet hole are formed in the spiral powder discharging end cover main body, the spiral powder discharging groove is formed by spirally arranging steel sheets in an anticlockwise arrangement mode, the air inlet hole is located in the center of the spiral powder discharging end cover main body, and a thread is arranged at the tail end of the spiral powder discharging end cover main body and is connected with the pressure relief connecting rod together through the thread.
As a preferred scheme of the utility model, the pressure relief connecting rod comprises a pressure relief connecting rod main body, an expanding cutting head, a fixed tool bit, a supporting expanding rod, a sliding connecting wedge, a trigger piston, a spring, a sliding fixing plate and a limiter;
the pressure relief connecting rod main body is integrally cylindrical, two grooves are arranged on the pressure relief connecting rod main body and are respectively used as a connecting wedge track and a fixing plate track, the sliding fixing plate is positioned in the fixing plate track, the sliding connecting wedge is positioned in the connecting wedge track, and the sliding connecting wedge and the connecting wedge can slide relatively in the respective tracks; a water/gas communicating pipe and a piston cavity are arranged in the pressure relief connecting rod main body, the piston cavity is positioned in the center of the pressure relief connecting rod main body, the water/gas communicating pipe is positioned on two sides of the pressure relief connecting rod main body, a plurality of limiting holes are uniformly arranged above the fixing plate rail at intervals, and the connecting wedge rail is communicated with the piston cavity;
a group of the diameter-expanding cutting heads, a group of the supporting diameter-expanding rods and a group of the fixing rods are symmetrically arranged on two sides of the pressure relief connecting rod main body, wherein the front end of each diameter-expanding cutting head is movably connected to the sliding fixing plate, the rear end of each diameter-expanding cutting head is movably connected to the front end of the fixed cutter head on the same side of the sliding fixing plate, and the tail end of the fixed cutter head on the same side of the sliding fixing plate is movably connected to the pressure relief connecting rod main body;
the front end of each supporting diameter expanding rod is movably connected to the fixed cutter head on the same side of the supporting diameter expanding rod, the rear end of each supporting diameter expanding rod is movably connected to the sliding connection wedge, the sliding connection wedge is tightly attached to one side of the trigger piston, the trigger piston is located in the piston cavity and is connected with the spring, and the limiting device is arranged in the limiting hole.
As another preferred scheme of the utility model, the removable pick monomer be provided with 3 ~ 6 groups the tip of removable pick main part be provided with the screw thread, adjacent removable pick monomer between through threaded connection.
Preferably, the first radial cutting pick and the second radial cutting pick are made of hard alloy, and the steel sheet is also made of hard alloy.
Preferably, the crushing and exhausting tooth intercepting part, the detachable tooth intercepting part and the spiral powder discharging end cover part are sequentially connected together through threads.
Furthermore, the maximum diameter of the crushing exhaust cutting pick body is 90mm, the minimum diameter of the detachable cutting pick body is 100mm, the maximum diameter of the detachable cutting pick body is 150mm, and the maximum outer diameter of the spiral powder discharge groove is 135 mm.
Further, the included angle between the adjacent first radial cutting picks is 120 degrees, and the included angle between the adjacent second radial cutting picks is 120 degrees.
Compared with the prior art, the utility model discloses following beneficial technological effect has been brought:
the utility model provides a but powder release device is arranged in drilling of reducing pyramid type has adopted among the device to arrange powder release drill bit, through improving row powder release drill bit, main improvement point lies in: the exhaust gas cutting tooth crushing device comprises a crushing exhaust cutting tooth part, a detachable cutting tooth part and a spiral powder discharge end cover part which are sequentially connected from front to back, wherein the crushing exhaust cutting tooth part is arranged at the foremost end of a drill bit main body and comprises a crushing exhaust cutting tooth main body, an axial crushing tooth, a radial cutting tooth I and a gas guide hole are respectively arranged on the crushing exhaust cutting tooth main body, the axial crushing tooth and the radial cutting tooth I are mutually matched, the rock crushing degree is high, the radial cutting tooth I in a triangular prism shape is more beneficial to the crushing of the rock, and the drilling speed is improved; the detachable cutting tooth part is formed by connecting a plurality of detachable cutting tooth monomers, the specific number of the detachable cutting tooth monomers is determined by the physical and mechanical properties of a coal body or a rock body and mainly depends on the tensile strength of the rock body, each detachable cutting tooth monomer comprises a detachable cutting tooth main body, a radial cutting tooth II is arranged on the detachable cutting tooth main body and is distributed in a triangular prism shape, the periphery of the detachable cutting tooth main body is high in rock breaking degree due to the design and the distribution of the radial cutting tooth II, and the specific number of the detachable cutting tooth monomers can be reasonably selected according to the tensile strength of the rock. And the quick powder discharge can be realized by combining the spiral powder discharge end cover part.
The utility model discloses can realize drilling the overall process and arrange the powder for the drilling piece can effectively discharge drilling, prevents the emergence that drilling blockked up, improves the efficiency of construction.
The utility model discloses the broken degree of rock is higher, prevents that the bold rock mass from hindering the creeping into of drill bit, has improved the rate of penetration.
The utility model discloses to the rock mass of different lithologies, according to rock tensile strength, the rational selection pick figure, quantitative control construction parameter has stronger adaptability to the geomechanical environment of complicacy.
The utility model discloses can realize perfect butt joint with the full-automatic controllable reducing release connecting rod of forward type, supplementary completion is to the local release of coal body or rock mass.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic structural view of a variable-diameter pyramid-shaped drilling and powder discharging pressure relief device of the present invention;
FIG. 2 is a perspective view of the powder discharge pressure relief drill of the present invention;
FIG. 3 is a plan view of the drill for discharging powder and relieving pressure of the present invention;
FIG. 4 is a plan view of the removable pick unit of the present invention;
FIG. 5 is an assembly view of a plurality of detachable cutting pick units according to the present invention;
FIG. 6 is a plan view of the spiral powder discharge end cap portion of the present invention;
in the figure:
1-discharging powder and pressure relief drill bit; 2-a pressure relief connecting rod; 11-breaking exhaust gas cutting tooth part; 12-removable cutting tooth part; 13-spiral powder discharging end cover part; 111-axial crushing teeth; 112-radial cutting pick one; 113-gas-guide holes; 121-radial pick II; 122-threads; 123-vent hole; 131-spiral powder discharge groove; 132-connecting threads; 133-air intake.
Detailed Description
The utility model provides a but reducing pyramid type drilling row powder pressure relief device, in order to make the utility model discloses an advantage, technical scheme are more clear, clear and definite, and it is right to combine specific embodiment below the utility model discloses do detailed description.
As shown in fig. 1, the utility model relates to a powder release device is arranged in drilling of variable diameter pyramid type mainly includes release connecting rod 2 and row powder release drill bit 1, arranges powder release drill bit 1 and installs the front end at release connecting rod 2, when in actual use, connects the required drilling rod of drilling process at the rear end of release connecting rod 2.
The pressure relief connecting rod 2 used in the utility model adopts the pressure relief connecting rod with the same structure as the pressure relief connecting rod with the application number of 2019110514381, and comprises a pressure relief connecting rod main body, an expanding cutting head, a fixed cutter head, a supporting expanding rod, a sliding connecting wedge, a trigger piston, a spring, a sliding fixing plate and a limiter; the pressure relief connecting rod main body is integrally cylindrical, two grooves are arranged on the pressure relief connecting rod main body and respectively used as a connecting wedge track and a fixing plate track, a sliding fixing plate is positioned in the fixing plate track, a sliding connecting wedge is positioned in the connecting wedge track, and the two sliding connecting wedges can slide in the respective tracks relatively; a water/gas communicating pipe and a piston cavity are arranged in the pressure relief connecting rod main body, the piston cavity is positioned in the center of the pressure relief connecting rod main body, the water/gas communicating pipe is positioned on two sides of the pressure relief connecting rod main body, a plurality of limiting holes are uniformly arranged above the fixed plate rail at intervals, and the connecting wedge rail is communicated with the piston cavity;
a group of expanding cutting heads, a group of supporting expanding rods and a group of fixing rods are symmetrically arranged on two sides of the pressure relief connecting rod main body, wherein the front end of each expanding cutting head is movably connected to the sliding fixing plate, the rear end of each expanding cutting head is movably connected to the front end of the fixed cutter head on the same side of the expanding cutting head, and the tail end of the fixed cutter head on the same side of the expanding cutting head is movably connected to the pressure relief connecting rod main body;
the front end of each supporting diameter expanding rod is movably connected to the fixed cutter head on the same side of the supporting diameter expanding rod, the rear end of each supporting diameter expanding rod is movably connected to a sliding connection wedge, the sliding connection wedge is tightly attached to one side of a trigger piston, the trigger piston is located in a piston cavity and is connected with a spring, and a stopper is arranged in a limiting hole.
Combine fig. 2 and fig. 3 to show, the utility model discloses main innovation point lies in improving row powder release drill bit 1, its concrete structure includes broken exhaust cutting tooth portion 11, can unload cutting tooth portion 12 and spiral row powder end cap portion 13, wherein, broken exhaust cutting tooth portion 11 is located the foremost of device, can unload cutting tooth portion 12 and pass through threaded connection at broken exhaust cutting tooth portion 11's tail end, concrete threaded connection mode sets up the external screw thread like the tail end at broken exhaust cutting tooth portion, the tip at the removable cutting tooth portion sets up the internal thread, the two docks and links together through external screw thread and internal thread accordant connection. The screw discharging end cap part 13 is arranged at the tail end of the detachable cutting tooth part 12, and the screw discharging end cap part and the detachable cutting tooth part are also connected together through screw threads.
The crushing exhaust cutting pick part comprises a crushing exhaust cutting pick body which is a hollow cylinder, axial crushing teeth 111, radial cutting teeth 112 and air guide holes 113 are respectively arranged on the crushing exhaust cutting pick body, wherein the number of the radial cutting teeth is three, the radial cutting teeth are uniformly distributed on the periphery of the crushing exhaust cutting pick body, the included angle between every two adjacent radial cutting teeth is preferably 120 degrees, the three radial cutting teeth 112 are distributed on the periphery of the crushing exhaust cutting pick body in a triangular prism shape, the axial crushing teeth 111 are positioned at the front end of the crushing exhaust cutting pick body, the air guide holes 113 are positioned at the central position of the crushing exhaust cutting pick body, the axial crushing cutting teeth 111 are used for crushing rocks in front of a drill bit, the drill bit can conveniently drill on a fixed track, the radial cutting teeth are arranged in the triangular prism shape, compared with the conventional drill bit structure, the hollow distribution characteristics are presented, the device has the advantages that a large amount of movement space is provided for the broken rock mass, and the broken rock mass or rock dust is convenient to discharge;
the air guide hole is used for providing high-pressure air at the front end of the drill bit and extruding the broken rock mass or rock powder in the broken exhaust cutting tooth part 11 and the detachable cutting tooth part 12 to the spiral powder discharge end cover part 13, so that the broken rock mass or rock powder can be conveniently and quickly discharged;
as shown in fig. 4 and 5, the detachable cutting tooth portion is formed by sequentially connecting a plurality of groups of detachable cutting tooth units, the specific number of the detachable cutting tooth units is determined by the physical and mechanical properties of a coal body or a rock body, and mainly depends on the tensile strength of the rock body, for example, 3 to 6 detachable cutting tooth units are preferred, and adjacent detachable cutting tooth units are connected through a thread 122.
Every group can load and unload the pick monomer including loading and unloading the pick main part, loading and unloading the pick main part is a hollow cylinder, be provided with radial pick two 121 on loading and unloading the pick main part, radial pick two 121 is the periphery that the triangular prism form distributes at the loading and unloading pick main part, the effect of radial pick two is with the radial rock of drill bit breakage, the drill bit of being convenient for expands in the country rock and advances, compare with current drill bit, the benefit of the structure of this part design like this is that can guarantee in the drilling dry type arrange the powder fast and can realize the structure changeable of release drill bit to complicated rock mass again: be provided with exhaust hole 123 on can loading and unloading pick body, the effect of exhaust hole 123 is that the radial regional high-pressure gas that provides of drill bit, will break rock mass or rock powder row and extrude spiral row powder end cap portion 13, makes things convenient for broken rock mass or rock powder to discharge fast.
As shown in FIG. 6, the spiral powder discharging end cover part comprises a spiral powder discharging end cover main body, a spiral powder discharging groove 131 and an air inlet 133 are arranged on the spiral powder discharging end cover main body, the spiral powder discharging groove 131 is formed by spirally arranging steel sheets which are arranged anticlockwise, and the spiral powder discharging groove 131 has the advantages that a guide groove is provided for broken rock masses or rock powder, accumulation and blockage along the powder are avoided, and quick powder discharging is realized.
The air inlet hole is positioned in the center of the spiral powder discharging end cover main body, the tail end of the spiral powder discharging end cover main body is provided with a connecting thread 132, and the connecting thread 132 is connected with the pressure relief connecting rod.
The utility model discloses preferably, the maximum diameter of broken exhaust pick main part is 90mm, and the minimum diameter that can unload the pick main part is 100mm, and the maximum diameter that can load and unload the pick main part is 150mm, and the maximum external diameter in spiral powder discharge groove is 135 mm.
The utility model discloses further preferred, the contained angle between the adjacent radial pick one is 120, and the contained angle between the adjacent radial pick two is 120, and the width of radial pick two 121 is 40 mm.
The following is a detailed description of the usage of the variable diameter pyramid drilling and powder discharging pressure relief device of the present invention.
The application method of the variable-diameter pyramid type drilling, powder discharging and pressure relieving device specifically comprises the following steps:
a. determination of number of single elements of detachable cutting tooth
Determining the number of the detachable cutting tooth monomers according to the physical and mechanical properties of the rock mass to be relieved:
when the tensile strength of the rock mass is less than or equal to 3MPa, the detachable cutting tooth part selects 6 detachable cutting tooth monomers;
when the tensile strength of the rock mass is more than 3MPa and less than or equal to 6MPa, 5 detachable cutting tooth units are selected as the detachable cutting tooth parts;
when the tensile strength of the rock mass is more than 6MPa and less than or equal to 9MPa, 4 detachable cutting tooth units are selected as the detachable cutting tooth parts;
when the tensile strength of the rock mass is more than 9MPa and less than or equal to 12MPa, the detachable cutting tooth part selects 3 detachable cutting tooth monomers;
when the tensile strength of the rock mass is more than 12MPa, the detachable cutting tooth part selects 2 detachable cutting tooth monomers;
b. determining a pressure relief target area, selecting a construction site needing local pressure relief treatment according to actual geological conditions of a coal mine, and determining the distance between a pressure relief drill hole and a roadway side or a coal wall to be 0.5-3 times;
c. selecting air pressure, namely determining the pressure of air according to the angle between the drilled hole and the horizontal plane, wherein the air pressure is greater than 0.5MPa when the included angle between the drilled hole and the horizontal plane is theta-90 degrees, and the air pressure is less than or equal to 0.5MPa when the included angle between the drilled hole and the horizontal plane is-90 degrees-theta;
d. in the site construction, a powder discharge pressure relief drill bit and a pressure relief connecting rod are sequentially connected onto a drilling machine through a drill rod at a construction site for local pressure relief treatment, the drilling machine is started to drill towards a target area, and after the target area is reached, the drilling machine is utilized to slowly withdraw related devices.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.
Although terms such as powder discharge pressure relief drill bits, pressure relief tie rods, broken exhaust cutting teeth, removable cutting teeth, etc., are used more herein, the possibility of using other terms is not excluded, and these terms are used merely for the purpose of more conveniently describing and explaining the essence of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
It is further understood that the specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The variable-diameter pyramid type drilling and powder discharging pressure relief device comprises a pressure relief connecting rod and a powder discharging and pressure relief drill bit, wherein the powder discharging and pressure relief drill bit is installed at the front end of the pressure relief connecting rod, and the tail end of the pressure relief connecting rod is connected with a drill rod required in the drilling process, and the variable-diameter pyramid type drilling and powder discharging pressure relief device is characterized in that:
the powder discharge pressure relief drill bit comprises a crushing exhaust tooth cutting part, a detachable tooth cutting part and a spiral powder discharge end cover part which are sequentially connected from front to back;
the crushing exhaust cutting pick part comprises a crushing exhaust cutting pick body, wherein an axial crushing tooth, a radial cutting pick I and an air guide hole are respectively arranged on the crushing exhaust cutting pick body, the radial cutting pick I is distributed on the periphery of the crushing exhaust cutting pick body in a triangular prism shape, the axial crushing tooth is positioned at the front end of the crushing exhaust cutting pick body, and the air guide hole is positioned at the central position of the crushing exhaust cutting pick body;
the detachable cutting tooth part is formed by sequentially connecting a plurality of groups of detachable cutting tooth monomers, wherein each group of detachable cutting tooth monomers comprises a detachable cutting tooth main body, a radial cutting tooth II is arranged on the detachable cutting tooth main body, the radial cutting tooth II is distributed on the periphery of the detachable cutting tooth main body in a triangular prism shape, and an exhaust hole is formed in the detachable cutting tooth main body;
the spiral powder discharging end cover part comprises a spiral powder discharging end cover main body, a spiral powder discharging groove and an air inlet hole are formed in the spiral powder discharging end cover main body, the spiral powder discharging groove is formed by spirally arranging steel sheets in an anticlockwise arrangement mode, the air inlet hole is located in the center of the spiral powder discharging end cover main body, and a thread is arranged at the tail end of the spiral powder discharging end cover main body and is connected with the pressure relief connecting rod together through the thread.
2. The variable diameter pyramid-type drilling, powder discharging and pressure relieving device of claim 1, wherein: the pressure relief connecting rod comprises a pressure relief connecting rod main body, an expanding cutting head, a fixed tool bit, a supporting expanding rod, a sliding connecting wedge, a trigger piston, a spring, a sliding fixing plate and a limiter;
the pressure relief connecting rod main body is integrally cylindrical, two grooves are arranged on the pressure relief connecting rod main body and are respectively used as a connecting wedge track and a fixing plate track, the sliding fixing plate is positioned in the fixing plate track, the sliding connecting wedge is positioned in the connecting wedge track, and the sliding connecting wedge and the connecting wedge can slide relatively in the respective tracks; a water/gas communicating pipe and a piston cavity are arranged in the pressure relief connecting rod main body, the piston cavity is positioned in the center of the pressure relief connecting rod main body, the water/gas communicating pipe is positioned on two sides of the pressure relief connecting rod main body, a plurality of limiting holes are uniformly arranged above the fixed plate rail at intervals, and the connecting wedge rail is communicated with the piston cavity;
a group of the diameter-expanding cutting heads, a group of the supporting diameter-expanding rods and a group of the fixed cutter heads are symmetrically arranged on two sides of the pressure relief connecting rod main body, wherein the front end of each diameter-expanding cutting head is movably connected to the sliding fixing plate, the rear end of each diameter-expanding cutting head is movably connected to the front end of the fixed cutter head on the same side of the sliding fixing plate, and the tail end of the fixed cutter head on the same side of the sliding fixing plate is movably connected to the pressure relief connecting rod main body;
the front end of each supporting diameter expanding rod is movably connected to the fixed cutter head on the same side of the supporting diameter expanding rod, the rear end of each supporting diameter expanding rod is movably connected to the sliding connection wedge, the sliding connection wedge is tightly attached to one side of the trigger piston, the trigger piston is located in the piston cavity and is connected with the spring, and the limiting device is arranged in the limiting hole.
3. The variable diameter pyramid-type drilling, powder-discharging and pressure-relieving device according to claim 1 or 2, wherein: the detachable cutting tooth single bodies are provided with 3-6 groups, threads are arranged at the end parts of the detachable cutting tooth main bodies, and adjacent detachable cutting tooth single bodies are connected through the threads.
4. The variable diameter pyramid-type drilling, powder-discharging and pressure-relieving device according to claim 3, wherein: the first radial cutting tooth and the second radial cutting tooth are made of hard alloy, and the steel sheet is also made of hard alloy.
5. The variable diameter pyramid-type drilling, powder-discharging and pressure-relieving device according to claim 3, wherein: the crushing exhaust tooth cutting part, the detachable tooth cutting part and the spiral powder discharging end cover part are sequentially connected together through threads.
6. The variable diameter pyramid-type drilling, powder-discharging and pressure-relieving device according to claim 3, wherein: the included angle between the adjacent first radial cutting picks is 120 degrees, and the included angle between the adjacent second radial cutting picks is 120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021296160.2U CN212454266U (en) | 2020-07-06 | 2020-07-06 | Variable-diameter pyramid type drilling and powder discharging pressure relief device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021296160.2U CN212454266U (en) | 2020-07-06 | 2020-07-06 | Variable-diameter pyramid type drilling and powder discharging pressure relief device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212454266U true CN212454266U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021296160.2U Expired - Fee Related CN212454266U (en) | 2020-07-06 | 2020-07-06 | Variable-diameter pyramid type drilling and powder discharging pressure relief device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212454266U (en) |
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2020
- 2020-07-06 CN CN202021296160.2U patent/CN212454266U/en not_active Expired - Fee Related
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