CN116696448A - Blocking coal water gas compressed air cyclone device - Google Patents
Blocking coal water gas compressed air cyclone device Download PDFInfo
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- CN116696448A CN116696448A CN202310644831.1A CN202310644831A CN116696448A CN 116696448 A CN116696448 A CN 116696448A CN 202310644831 A CN202310644831 A CN 202310644831A CN 116696448 A CN116696448 A CN 116696448A
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- annular sleeve
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- passage
- coal
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000003245 coal Substances 0.000 title claims abstract description 34
- 230000000903 blocking effect Effects 0.000 title abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract 2
- 241001330002 Bambuseae Species 0.000 claims abstract 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract 2
- 239000011425 bamboo Substances 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 abstract description 32
- 238000005553 drilling Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 11
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 238000009423 ventilation Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 110
- 238000000034 method Methods 0.000 description 13
- 238000009434 installation Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- -1 and other light Chemical compound 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Cyclones (AREA)
Abstract
The utility model provides a shutoff coal water gas compressed air cyclone, includes the annular sleeve, and first end outer wall sets up the inlet channel, and inlet channel and first gas channel's entry end intercommunication, first gas channel extend in the annular sleeve section of thick bamboo wall, and first gas channel's exit end is located the annular sleeve and is close to on the inner peripheral wall of second end, communicates with annular sleeve's inner space, and its direction of giving vent to anger is along the tangential direction of annular sleeve inner wall and towards annular sleeve's second end slope. When the device is used, the device is firstly installed on a drill rod, then ventilation is carried out, a drilling machine is started, and the gas flow is automatically regulated to realize sealing by detecting the leakage condition of coal water and gas in real time. According to the invention, gas vortex can be formed between the drill rod and the annular sleeve, so that the effect of blocking coal water and gas is achieved.
Description
Technical Field
The invention belongs to the technical field of mine gas disaster prevention and control, and relates to a novel movement sealing method and technology.
Background
In recent years, along with the increasing of the mining depth of the coal mine, the gas emission amount of the coal mine is increased, so that the problems of coal mine gas overrun and coal and gas outburst in the drilling construction process are solved, the sealing of the movement positions of the drill rod and the drilling three-proofing device is urgently needed to be solved, and the purposes of preventing coal water and gas from flowing out from a movement gap, causing coal water cross flow or gas overrun, affecting civilization production and threatening production safety are achieved.
The conventional technology is to realize sealing through technical means such as rubber or a brush, and the like, as shown in fig. 1, the device comprises a collecting box 1, a gas drainage port 2 and a water outlet 3 are respectively arranged on the side wall of the collecting box 1, a coal dust collecting port 4 and a central hole 5 are respectively arranged at two ends of the collecting box 1, a drill rod passes through the central hole 5, a sealing piece 6 is arranged at the central hole 5, the sealing piece 6 consists of a sealing part 601 and a fixing part 602 connected around the sealing part 601, the sealing part 601 is of a corrugated structure which is made of elastic materials and is provided with continuous wave crests and wave troughs, a sealing lip 603 for the drill rod to pass through is arranged at the center of the sealing part 601, and the sealing surface of the sealing lip 603 is matched with the outer circumferential surface of the drill rod.
The sealing means cannot achieve complete sealing in the drilling process, and has obvious relative effect on the round drill rod, but the sealing effect is poor due to the fact that the sealing surface cannot be tightly attached to the outer peripheral surface of the drill rod due to rotation of the drill rod in the drilling process. Along with the prevention of safety risk of gas overrun in mines and the improvement of production environment requirements, the problem of sealing coal water and gas between relative movements is urgently needed to be solved.
Disclosure of Invention
The invention aims to solve the production safety problems of overrun of roadway gas and crossflow of coal water caused by overflow of coal water and gas in the process of relative movement of a drill rod and a collecting box. The anti-outburst drill pipe is particularly used for avoiding the situation that coal water and gas leak and flow out from between the moving drill pipe and the anti-spraying collecting box to cause the coal water cross flow to cause the deterioration of a roadway and a construction environment or cause the gas leakage to cause the overrun of the roadway gas when the anti-outburst drill pipe is used for carrying out anti-outburst drill construction.
According to one embodiment of the invention, the device for blocking the compressed air rotational flow of the coal-water gas comprises an annular sleeve, wherein an air inlet channel is arranged on the outer wall of the first end, the air inlet channel is communicated with the inlet end of the first air channel, the first air channel extends in the wall of the annular sleeve, the outlet end of the first air channel is positioned on the inner peripheral wall of the annular sleeve, which is close to the second end, and is communicated with the inner space of the annular sleeve, and the air outlet direction of the air outlet channel is inclined towards the second end of the annular sleeve along the tangential direction of the inner wall of the annular sleeve.
According to one embodiment of the invention, the first gas channel comprises a cylindrical through hole, the axial direction of which is parallel to the axis of the annular sleeve.
According to one embodiment of the invention, the cylindrical through holes are a plurality of and uniformly distributed along the circumference of the annular sleeve.
According to one embodiment of the invention, the first gas passage comprises a cylindrical helical gas passage.
According to one embodiment of the invention, the relationship between the lead h of the cylindrical helical airway and the inner diameter D of the annular sleeve is:
according to one embodiment of the invention, the angle of rise of the cylindrical spiral ranges between 30 ° and 60 °.
According to one embodiment of the invention, the cylindrical spiral air passages are distributed in a plurality of circumferential directions in the annular sleeve.
According to one embodiment of the invention, the first gas passage further comprises an annular passage, the annular sleeve is provided with an annular protrusion at a first end, the annular passage is arranged in the annular protrusion, an outlet of the gas inlet passage is communicated with the annular passage, and an inlet of each cylindrical through hole or each cylindrical spiral air passage is communicated with the annular passage.
According to one embodiment of the invention, the outer diameter of the annular protrusion is equal to or larger than the outer diameter of the annular sleeve plus the diameter of the annular inlet channel.
According to one embodiment of the present invention, the axial length of the annular protrusion is equal to or greater than the diameter of the air intake nozzle.
According to one embodiment of the invention, when there is more than one air inlet channel, the air inlet channels are circumferentially distributed on the annular channel.
According to one embodiment of the invention, when N intake passages are provided on the annular intake passage, the sum of the areas of the cross sections of all the cylindrical through holes or the cylindrical spiral air passages is less than 2N times the area of the cross section of the annular intake passage.
According to one embodiment of the invention, the outlets of the cylindrical through holes or the cylindrical spiral air passages are circumferentially distributed along the inner wall of the annular sleeve.
According to one embodiment of the invention, the outlets of the cylindrical through holes or the cylindrical spiral air passages are divided into two rows along the axial direction of the annular sleeve, and the two rows are respectively and uniformly distributed and staggered along the axial direction.
According to one embodiment of the invention, the diameter of the cylindrical through hole or cylindrical spiral airway is in the range of 2-6 mm.
According to one embodiment of the invention, a gap exists between the inner wall of the annular sleeve and the outer wall of the drill rod.
According to one embodiment of the invention, the diameter of the first gas passage is between 1/3 and 2/3 of the wall thickness of the annular sleeve.
According to one embodiment of the invention, the second end peripheral wall of the annular sleeve is provided with a threaded section.
According to one embodiment of the invention, a coal water sensing element and a gas sensing element are arranged in the annular sleeve at a position close to the first end and are respectively connected with the control system through electric signals; the control system is electrically connected with a flow valve of the air inlet pipe.
According to one embodiment of the invention, the method comprises the following steps:
s1, installation: the blocking coal water gas compressed air cyclone device is arranged on a drilling machine;
s2, ventilation: opening a gas valve communicated with the gas inlet channel, and conveying high-pressure gas to the gas inlet channel;
s3, opening a drilling machine;
s4, detecting feedback results of the coal water sensing element and the gas sensing element in real time, judging whether leakage occurs according to the feedback results, and if so, adjusting the gas flow by 5% -10%; s4, circulating the step to finish the operation;
and S5, after the operation is finished, closing the drilling machine and then closing the air valve.
According to one embodiment of the invention, the drill is stopped and an alarm signal is issued if the value fed back by the gas sensing element exceeds a preset threshold.
According to one embodiment of the invention, if the gas flow has been regulated to a maximum, there is still a leak, the drilling machine is stopped and an alarm signal is issued.
According to the invention, the first gas channel is arranged in the annular sleeve, and the gas outlet direction of the outlet end of the first gas channel is inclined towards the second end of the annular sleeve along the tangential direction of the inner wall of the annular sleeve, so that gas forms a high-pressure zone between the sleeve and the drill rod, and a gas seal can be formed between the gas outlet and the drill rod, thereby preventing coal water and gas from overflowing.
Moreover, by optimizing the angle of the air outlet and adjusting the setting mode of the first air passage, vortex can be formed between the air outlet and the drill rod, so that the sealing effect is optimal.
Meanwhile, through the arrangement of the coal water sensing element, the gas sensing element and the automatic control system, the gas flow can be automatically adjusted according to requirements, so that the sealing effect is ensured, the system can be stopped and alarm when accidents happen, and the safety performance of the system is greatly improved.
Compared with the prior art, the invention can completely seal the gap between the drill rod and the fixed box body which move relatively when drilling, and completely prevent the leakage of coal water and gas. Meanwhile, the drill rod can be suitable for non-circular drill rods or grooved drill rods.
Drawings
FIG. 1 shows a prior art solution for plugging coal water gas;
FIG. 2 shows a perspective view of the plugging coal-water gas plenum cyclone device of the present invention;
FIG. 3 shows a perspective view of an embodiment of the present invention;
FIG. 4 shows a perspective view of one embodiment of the invention with the internal structure shown in phantom;
FIG. 5 shows a perspective view of another embodiment of the present invention, the internal structure of which is shown in phantom;
FIG. 6 shows a perspective view of another embodiment of the present invention, the internal structure of which is shown in phantom;
FIG. 7 shows a perspective view from another perspective of the FIG. 6 embodiment of the invention with the internal structure shown in phantom;
FIG. 8 shows a schematic diagram of the assembly of one embodiment of the invention in use;
FIG. 9 illustrates a perspective view of the assembled view of FIG. 8, taken along the direction D-D, in accordance with the present invention;
fig. 10 shows a schematic view of another view of fig. 9.
10. Compressed air cyclone device
11. Annular sleeve
111 first end
112 second end
113 annular projection
114 thread segment
12. Air inlet channel
13. First gas passage
131 inlet end
132 outlet end
133 cylindrical spiral air flue
134 annular channel
20. Nut
30. Sealing device
40. Drill rod
50. Collecting box
Detailed Description
The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those of ordinary skill in the art to better understand and thus practice the teachings of the present invention, and are not meant to imply any limitation on the scope of the invention.
As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment. The term "another embodiment" is to be interpreted as "at least one other embodiment".
Fig. 2-3 show perspective views of a plugging coal-water gas plenum cyclone device 10 according to one embodiment of the invention, comprising an annular sleeve 11, an air inlet channel 12 is arranged on the outer wall of a first end 111, the air inlet channel 12 is communicated with an inlet end 131 of a first air channel 13, the first air channel 13 extends inside the wall of the annular sleeve 11, an outlet end 132 of the first air channel 13 is positioned on the inner peripheral wall of the annular sleeve 11 near a second end 112 and is communicated with the inner space of the annular sleeve 11, and the air outlet direction of the air outlet channel is inclined along the tangential direction of the inner wall of the annular sleeve 11 and towards the second end 112 of the annular sleeve 11.
Referring to fig. 4, which illustrates an embodiment of the present invention, the first gas passage 13 includes a cylindrical through-hole having an inlet end 131 communicating with the gas inlet passage 12, disposed proximate the first end 111. The axial direction of the cylindrical through hole is parallel to the central axis of the annular sleeve 11. The first gas passage 13 also has a curved section extending toward the inner wall surface of the annular sleeve 11 and inclined toward the second end 112 of the annular sleeve 11, with an outlet end 132 extending through the inner wall of the annular sleeve 11.
By the above arrangement, the high-pressure gas ejected from the outlet end 132 of the first gas passage 13 can be made to move along the inner peripheral surface of the annular sleeve 11 while also moving toward the second end 112 of the annular sleeve in the axial direction of the annular sleeve 11. In a narrow space, the air flow can generate pressure towards the second end 112 of the annular sleeve 11 around the drill rod, so that the blocking of coal water and gas is realized.
According to one embodiment of the invention, the first gas passages 13 are provided in plurality and are uniformly distributed along the circumference of the annular sleeve 11. Through this arrangement, the outlet ends 132 of the first gas passages 13 are circumferentially and uniformly distributed on the inner circumferential surface of the annular sleeve 11, and the plurality of outlet ends 132 simultaneously spray high-pressure gas against the space inside the annular sleeve, so that the airflow vortex is easier to form, and the sealing effect is more uniform.
Referring to fig. 4, in this embodiment, 4 intake passages 12 are provided, and an annular passage is provided within the first end 111, and the ends of the 4 intake passages 12 are each in communication with the annular passage. And 6 first gas passages 13 are also arranged, the inlet ends of the 6 first gas passages 13 are communicated with the annular passage, and the cylindrical through hole parts of the 6 first gas passages extend axially in the wall of the annular sleeve 11 and are uniformly distributed along the circumferential direction.
It will be appreciated that the same number of intake passages 12 as the first gas passages 13 may be provided so that each intake passage 12 communicates directly with the first gas passage 13 in one-to-one correspondence, without having to provide an annular passage.
In order to secure the strength of the overall structure and the strength of the gas passage, it is preferable that the center axis of the cylindrical through hole portion is located at the center of the thickness of the wall of the annular sleeve 11.
Referring to fig. 5, another embodiment of the present invention is shown. The embodiment according to fig. 4 differs in that it is provided with 4 inlet channels 12 and 8 first gas channels 13.
It will be appreciated that the number of intake passages 12 and the number of first gas passages 13 may be set as desired.
Referring to fig. 6-7, another embodiment of the present invention is shown wherein the first gas passage 13 includes a cylindrical helical gas channel 133. A cylindrical helical air passage 133 is provided inside the wall of the annular sleeve 11, extending in the axial direction and the circumferential direction of the annular sleeve 11. The inlet end of the cylindrical spiral air passage 133 may be in direct communication with the air intake passage 12, with the outlet end of the cylindrical spiral air passage 133 being located on the inner wall of the annular sleeve 11 near the second end 112.
By arranging the first gas passage 13 in a cylindrical spiral shape, the direction and speed of movement of the gas flow ejected from the outlet end can be further improved, whereby a better sealing effect is obtained.
According to one embodiment of the present invention, the relationship between the lead h of the cylindrical helical airway 133 and the annular sleeve inner diameter D is:the preferred value range is 30-150mm.
According to one embodiment of the invention, the direction of rotation of the cylindrical helical airway 133 is either left-handed or right-handed.
According to one embodiment of the invention, the angle of elevation of the cylindrical helix ranges between 30 ° and 60 °, preferably 45 °.
According to one embodiment of the invention, the cylindrical spiral air passages 133 are provided in plurality and circumferentially distributed in the annular sleeve 11.
The number of cylindrical spiral airways 133 is preferably 6-8.
Through the arrangement, the outlet ends 132 of the cylindrical spiral air passages 133 are circumferentially and uniformly distributed on the inner peripheral surface of the annular sleeve 11, and a plurality of outlet ends 132 simultaneously spray high-pressure gas against the space inside the annular sleeve, so that airflow vortex is easier to form, and the sealing effect is more uniform.
According to one embodiment of the present invention, the first gas passage 13 further includes an annular passage 134, the first end 111 of the annular sleeve 11 is provided with an annular protrusion 113, the annular passage 134 is disposed within the annular protrusion 113, the outlet of the gas inlet passage 12 is in communication with the annular passage 134, and the inlet of each cylindrical spiral gas passage 133 is in communication with the annular passage 134.
Through the above arrangement, the high-pressure gas enters the annular passage 134 from the outlet of the gas inlet passage 12, advances to both sides along the annular passage 134, and enters the cylindrical spiral gas passage 133 through the inlet of the cylindrical spiral gas passage 133. By this arrangement, the number of air inlet passages 12 and thus the number of air inlet connectors and air pipes can be reduced, thereby reducing the weight and cost of the overall device. Meanwhile, all the cylindrical spiral air passages 133 are supplied with air through the annular channel 134, so that the air supply is synchronous and uniform, the uniformity of the air sprayed out of the outlets of the cylindrical spiral air passages is ensured, and air flow vortex is easier to form.
Further, the annular protrusion 113 can also play a role in positioning and pressing at the time of installation.
According to one embodiment of the invention, the outer diameter of annular projection 113 is. The annular channel 134 is preferably provided at a central location in the thickness of the annular sleeve 11 and annular projection 113. This arrangement ensures the strength of the annular projection 113 and the entire annular sleeve 11 so that deformation or breakage does not easily occur when subjected to a force.
According to one embodiment of the present invention, the axial length of the annular protrusion 113 is equal to or greater than the diameter of the air intake nozzle. The air inlet nozzle is used for connecting the air pipe and the air inlet channel, so that the air inlet nozzle can not exceed the edge of the annular protrusion 113 after being installed, and interference with other parts can not be caused.
According to one embodiment of the invention, when there is more than one inlet passage 12, there is circumferentially distributed on the annular passage 134 or on the annular sleeve 11. If only one intake passage 12 is provided, the gas pressure in the cylindrical spiral gas passage 133 distant from the intake passage 12 is necessarily slightly lower than the gas pressure in the cylindrical spiral gas passage 133 close to the intake passage 12, so that uneven gas discharge is liable to be caused. By this arrangement, the gas pressure within the entire annular channel 134 is more equalized, thereby improving the uniformity of the gas entering each cylindrical helical airway 133.
The diameter of the air inlet channel may be one of 8mm, 10mm, 12mm, 16 mm.
According to one embodiment of the invention, when N inlet passages are provided on annular passage 134, the sum of the cross-sectional areas of all cylindrical spiral airways 133 is less than 2N times the cross-sectional area of annular passage 134.
Through the arrangement, the air inflow can be ensured to be enough, the air cannot attenuate at the source, and the outlet air quantity is ensured.
According to one embodiment of the invention, the outlets of the cylindrical helical airways 133 are circumferentially equispaced along the inner wall of the annular sleeve 11. The circumferential uniform distribution is more beneficial to forming airflow vortex and ensures the stability of the airflow vortex.
According to one embodiment of the invention, the outlets of the cylindrical spiral air passages 133 are divided into two rows along the axial direction of the annular sleeve 11, and are respectively and uniformly distributed and staggered along the axial direction. By the arrangement, the sealing effect can be better improved.
According to one embodiment of the invention, the diameter of cylindrical helical airway 133 ranges between 2-6 mm.
The diameter of the cylindrical helical airway 133 is preferably 3mm.
The diameter of the cylindrical spiral air passage is too small, so that the flow speed and pressure of high-pressure gas can be greatly reduced, the diameter is too large, and the strength and rigidity of the whole device can be reduced.
Referring to fig. 8-10, according to one embodiment of the invention, a gap exists between the inner wall of the annulus 11 and the outer wall of the drill rod 40. If no gap is provided between the two, huge friction force is generated between the two in the process of rotating the drill rod 40 at high speed, so that the drilling hole is influenced, and the sealing is also influenced.
The above gap is in the range of 1 to 3mm, preferably 1mm. Too large a gap is detrimental to sealing and too small a gap can easily contact or collide during high rotation of the drill pipe 40 due to tolerances.
According to one embodiment of the invention, the diameter of the drill rod 40 is 73mm, the corresponding annular sleeve 11 has an inner diameter of 75mm, an outer diameter of 89mm and a diameter of 3mm for a cylindrical helical airway.
According to one embodiment of the invention, the diameter of the first gas channel 13 is between 1/3 and 2/3 of the wall thickness of the annular sleeve 11.
According to one embodiment of the invention, the second end 112 of the annular sleeve 11 is provided with a threaded section 114 on the peripheral wall.
The second end 112 is sleeved with a nut 20 for positioning and compressing. Nut 20 is connected to annular sleeve 11 by threaded section 114.
According to an embodiment of the present invention, the material of the annular sleeve 11 may be any one of nylon, stainless steel and copper, and other light, flame-retardant and antistatic materials may be used.
The annular sleeve 11 may be integrally formed by means of additive manufacturing.
According to one embodiment of the invention, a coal water sensing element and a gas sensing element are arranged in the annular sleeve 11 at a position close to the first end 111 and are respectively connected with the control system through electrical signals; the control system is electrically connected with a flow valve of the air inlet pipe. Through setting up above-mentioned sensing element and control system, can realize the automated control to drilling process, detect coal water and gas in real time and reveal, according to actual conditions adjustment high-pressure gas's flow, perhaps shut down the warning.
The device for blocking the coal water gas compressed air cyclone has reasonable structure and low cost, and can effectively block the coal water and gas leaked along the drill rod in the drilling process. In actual use, the device can be checked and replaced regularly, so that abrasion is avoided.
According to one embodiment of the invention, a method for using the plugging coal water gas compressed air cyclone device 10 comprises the following steps:
s1, installation: the plugging coal-water gas compressed air swirling device 10 of the invention is mounted on a drilling machine.
Referring to fig. 8-10, during installation, the second end 112 of the annular sleeve 11 is first extended into the collection box 50 from the central bore of the sealing device 30 of the collection box 50 until the stepped surface of the annular protrusion at the first end 111 of the annular sleeve 11 abuts the end surface of the sealing device 30, and then the nut 20 is threaded onto the threaded section 114 of the second end of the annular sleeve 11 from the other side, and the two are fixedly connected by threads, thereby completing the installation of the annular sleeve 11. Next, a high pressure gas source is connected by a conduit to the inlet passage 12 of the first end 111 of the annular sleeve 11.
In use, the drill rod 40 is passed through the centre of the annulus 11 and then the drilling operation is performed.
S2, ventilation: a gas valve communicating with the intake passage 12 is opened to deliver high-pressure gas to the intake passage 12.
Wherein, the high-pressure gas can be nitrogen or other inert gases, and the gas supply pressure can be between 0.3MPa and 0.8 MPa.
S3, opening the drilling machine, and starting drilling operation.
S4, detecting feedback results of the coal water sensing element and the gas sensing element in real time, judging whether leakage occurs according to the feedback results, and if so, adjusting the gas flow by 5% -10%. In the drilling operation process, feedback results of the coal water sensing element and the gas sensing element are detected in real time, whether a small amount of coal water and/or gas still leaks or not can be timely known, if not, normal operation is continued, and if so, the gas flow is automatically regulated up through an automatic control system, so that the sealing effect of the airflow vortex is improved. After the gas flow is regulated up, continuing to detect, judging whether leakage occurs or not, and if leakage still occurs, continuing to regulate up the gas flow by 5% -10%. And (5) cycling the process until the operation is finished.
And S5, after the operation is finished, closing the drilling machine and then closing the air valve. This sequence ensures a sealing effect throughout the drilling process.
According to one embodiment of the invention, the drill is stopped and an alarm signal is issued if the value fed back by the gas sensing element exceeds a preset threshold. If the gas leakage exceeds the preset threshold, the sealing is invalid, the gas leakage is serious, and at the moment, the gas leakage cannot be controlled no matter how the gas supply pressure or the gas flow is increased, and the machine must be stopped for alarming.
According to one embodiment of the invention, if the gas flow has been regulated to a maximum, there is still a leak, the drilling machine is stopped and an alarm signal is issued.
The foregoing description of implementations of the present disclosure has been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive or to limit the disclosure to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the disclosure. The embodiments were chosen and described in order to explain the principles of the present disclosure and its practical application to enable one skilled in the art to utilize the present disclosure in various embodiments and with various modifications as are suited to the particular use contemplated.
Claims (15)
1. The utility model provides a shutoff coal water gas compressed air cyclone, its characterized in that, includes the annular sleeve, and first end outer wall sets up the inlet channel, and inlet channel and first gas channel's entry end intercommunication, first gas channel extend in the annular sleeve section of thick bamboo wall, and the exit end of first gas channel is located the annular sleeve and is close to on the inner peripheral wall of second end, communicates with the inner space of annular sleeve, and its direction of giving vent to anger is along the tangential direction of annular sleeve inner wall and towards the second end slope of annular sleeve.
2. The plugging coal-water gas compressed air cyclone device according to claim 1, wherein: the first gas passage includes a cylindrical through hole whose axial direction is parallel to the axis of the annular sleeve.
3. A plugging coal-water gas plenum cyclone device as claimed in claim 2, wherein: the cylindrical through holes are distributed uniformly along the circumference of the annular sleeve.
4. The plugging coal-water gas compressed air cyclone device according to claim 1, wherein: the first gas passage includes a cylindrical helical gas passage.
5. The plugging coal-water gas compressed air cyclone device according to claim 4, wherein: the rise angle of the cylindrical spiral ranges from 30 degrees to 60 degrees.
6. The plugging coal-water gas compressed air cyclone device according to claim 4, wherein: the cylindrical spiral air passage is provided with a plurality of air passages, and the air passages are circumferentially and uniformly distributed in the annular sleeve.
7. A device for plugging a coal-water gas plenum cyclone as claimed in claim 3 or 6, wherein: the first gas passage further comprises an annular passage, the annular protrusion is arranged at the first end of the annular sleeve, the annular passage is arranged in the annular protrusion, the outlet of the gas inlet passage is communicated with the annular passage, and each cylindrical through hole or the inlet of the cylindrical spiral air passage is communicated with the annular passage.
8. The plugging coal-water gas plenum cyclone device of claim 7, wherein: the outer diameter of the annular protrusion is larger than or equal to the outer diameter of the annular sleeve plus the diameter of the annular air inlet channel.
9. The plugging coal-water gas plenum cyclone device of claim 7, wherein: when the number of the air inlet channels is more than one, the air inlet channels are circumferentially and uniformly distributed on the annular channel.
10. The plugging coal-water gas plenum cyclone device of claim 9, wherein: when the annular air inlet channels are provided with N air inlet channels, the sum of the areas of the cross sections of all the cylindrical through holes or the cylindrical spiral air channels is smaller than 2N times of the area of the cross section of the annular air inlet channels.
11. The plugging coal-water gas plenum cyclone device of claim 7, wherein: the outlets of the cylindrical through holes or the cylindrical spiral air passages are uniformly distributed along the circumferential direction of the inner wall of the annular sleeve.
12. The plugging coal-water gas plenum cyclone device of claim 7, wherein: the outlets of the cylindrical through holes or the cylindrical spiral air passages are divided into two rows along the axial direction of the annular sleeve, and the two rows are respectively and uniformly distributed along the axial direction and staggered.
13. The plugging coal-water gas compressed air cyclone device according to claim 1, wherein: a gap exists between the inner wall of the annular sleeve and the outer wall of the drill rod.
14. The plugging coal-water gas compressed air cyclone device according to claim 1, wherein: the second end peripheral wall of the annular sleeve is provided with a threaded section.
15. The plugging coal-water gas compressed air cyclone device according to claim 1, wherein: a coal water sensing element and a gas sensing element are arranged at the position, close to the first end, in the annular sleeve and are respectively connected with the control system through electrical signals; the control system is electrically connected with a flow valve of the air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310644831.1A CN116696448A (en) | 2023-06-02 | 2023-06-02 | Blocking coal water gas compressed air cyclone device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310644831.1A CN116696448A (en) | 2023-06-02 | 2023-06-02 | Blocking coal water gas compressed air cyclone device |
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| CN116696448A true CN116696448A (en) | 2023-09-05 |
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|---|---|---|---|
| CN202310644831.1A Pending CN116696448A (en) | 2023-06-02 | 2023-06-02 | Blocking coal water gas compressed air cyclone device |
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