CN110886622A - Lotus-shaped mine explosion door - Google Patents
Lotus-shaped mine explosion door Download PDFInfo
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- CN110886622A CN110886622A CN201911311165.XA CN201911311165A CN110886622A CN 110886622 A CN110886622 A CN 110886622A CN 201911311165 A CN201911311165 A CN 201911311165A CN 110886622 A CN110886622 A CN 110886622A
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- 238000004880 explosion Methods 0.000 title claims abstract description 148
- 238000009423 ventilation Methods 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000003921 oil Substances 0.000 claims description 82
- 230000007246 mechanism Effects 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 7
- 230000008014 freezing Effects 0.000 abstract description 2
- 238000007710 freezing Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
- E21F17/12—Dam doors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B51/00—Operating or controlling locks or other fastening devices by other non-mechanical means
- E05B51/02—Operating or controlling locks or other fastening devices by other non-mechanical means by pneumatic or hydraulic means
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses a lotus-shaped mine explosion door which comprises a base frame and four explosion door bodies, wherein each explosion door body consists of four fan-shaped explosion door covering plates, an oil cylinder is rotatably arranged on one side of the upper part of each explosion door covering plate, the base frame is arranged on the upper part of a ventilation shaft, a circle of explosion door foundation is arranged on the periphery of the ventilation shaft along the circumferential direction, and the bottom end of the base frame is fixedly connected with the explosion door foundation. The sealing is realized by adopting rubber sealing, the sealing surface is wide, the sealing can be effectively realized, and the air leakage is avoided. The problems of liquid volatilization of liquid seal and freezing in winter are solved, the influence of seasons on the seal is small, and the liquid does not need to be supplemented. The four-piece explosion door shroud plate is of a split structure, so that the explosion door can be opened more easily, and the explosion door cannot be exploded to fly when gas explosion is guaranteed, so that the quick reset is guaranteed. The explosion door shroud plate can be freely opened and closed, is not easy to be jacked by airflow during explosion, is not easy to damage, can be repeatedly used, and saves cost.
Description
Technical Field
The invention relates to an explosion vent, in particular to a lotus-shaped mine explosion vent, and belongs to the field of mine application.
Background
The mining depth and the mining output of the mine are greatly improved, the gas in a stope face and a return airway is continuously increased, and the safe operation of a mine ventilation system is the fundamental premise for ensuring the production safety of the coal mine. For high gas mines, it is especially important to ensure ventilation safety. In the sustainable development of primary energy consumption of economy in China, coal is still the main energy, the yield of the coal can be continuously increased, and the safe production is more and more important. The mine ventilation system plays a role in lifting the weight in the safety production process, the wellhead explosion-proof door is a key link in the ventilation system, the old explosion-proof door is not changed for years, and a plurality of defects and shortcomings appear in the mine construction, electromechanical installation and operation processes.
The following defects exist in the construction, installation and use processes of the old explosion vent:
1. the size deviation of the closed oil groove is large, and the inner wall and the outer wall are irregular, so that the explosion-proof cover cannot be completely matched;
2. the steel-concrete structure made of the oil tank material has unqualified seepage prevention, and water and oil are required to be continuously added for water and oil leakage;
3. when the machine is operated in a scheduled monthly dump, the personnel repeatedly operate the anti-explosion cover pressing plate, so that the operation is complex;
4. when the main ventilator is stopped accidentally, the explosion-proof cover is inclined, the balance weight is unreasonable, and the explosion-proof cover cannot be opened and cannot form natural ventilation;
5. the ventilation device is difficult to open and close, and the ventilation can not be reasonably restored as soon as possible in time and in time under the condition of preventing mine accidents;
6. the anti-disaster capability is poor, if the high-pressure airflow (shock wave) generated during gas and coal dust explosion happens underground flushes the explosion-proof cover, the explosion-proof cover cannot be ensured to be reset in time after the high-pressure airflow passes, and forced anti-wind measures are delayed.
7. The operation of pressing the edge of the explosion-proof cover by the pressing block consumes much time, occupies more personnel and is unsafe to ascend.
8. The strength of the explosion door can not meet the requirement, and a 3mm steel plate L50 multiplied by 50 multiplied by 5 angle steel welding piece is easy to deform and leak air.
9. If a poor explosion accident occurs, the explosion-proof door cannot be automatically reset after being opened and decompressed, the explosion-proof door (cover) arranged on the air shaft is opened due to explosion shock waves, although the fan of the air shaft does not stop running, the air shaft becomes an air inlet shaft due to the fact that negative pressure inside and outside a shaft disappears due to the opening of the explosion-proof door (cover) and other air shafts act, toxic and harmful gas generated by explosion of an area served by the air shaft diffuses to areas served by other air shafts along with turbulent air flow caused by other air shafts, and therefore the service areas of other air shafts are damaged by the explosion accident.
Disclosure of Invention
The invention aims to provide a lotus-shaped mine explosion vent which can solve the technical problems that the existing explosion vent is low in safety performance, cannot be freely opened and closed according to actual requirements, cannot be reused and is high in cost.
The purpose of the invention can be realized by the following technical scheme:
the lotus-shaped mine explosion door comprises a base frame and four explosion door bodies, wherein each explosion door body consists of four fan-shaped explosion door covering plates, an oil cylinder is rotatably installed on one side of the upper part of each explosion door covering plate, the base frame is installed on the upper part of a ventilation shaft, a circle of explosion door foundation is arranged on the periphery of the ventilation shaft along the circumferential direction, the bottom end of the base frame is fixedly connected with the explosion door foundation, four hammer frames are installed on the top of the explosion door foundation, and the other end of the oil cylinder is rotatably connected with one side of each hammer frame;
the bottom of the explosion-proof door body is connected with an inner support frame, the top of the inner support frame is provided with a dome, one side of the inside of the dome is provided with a gas sensor, the other side of the dome is provided with a dome cover, the inside of the dome cover is provided with an electromagnetic discharge valve, the outside of the inner support frame is provided with an explosion-proof door frame, and an explosion-proof door cover plate is fixedly arranged with the inner support frame through the explosion-proof door frame; the bottom end of the inner support frame is hinged with the base frame, and oil-resistant rubber plates are arranged in a connecting gap between the explosion-proof door covering plates and a gap between the bottom of the explosion-proof door covering plate and the base frame.
Preferably, the outer part of the explosion door shroud plate is connected with a main joist, an annular sealing groove is formed in the joint of the bottom of the explosion door body and the base frame, and an oil-resistant rubber plate is arranged inside the annular sealing groove.
Preferably, the upper part of the weight frame is provided with a pulley, a pull rope is arranged inside the top end of the pulley, one end of the pull rope is connected with one side of the upper part of the explosion-proof door covering plate, and the other end of the pull rope is connected with a weight.
Preferably, the top edge of the explosion door shroud plate is tightly abutted with the outer side of the dome, and an oil-resistant rubber plate is mounted at the joint of the explosion door shroud plate and the dome.
Preferably, the inside horizontal installation of base frame has the mounting panel, and the both sides of mounting panel all are through the inner wall fixed connection of fixed plate with the base frame, and the middle part of mounting panel runs through along thickness direction and is provided with the through-hole.
Preferably, four positioning mechanisms are uniformly arranged on the upper portion of the mounting plate outside the through hole along the circumferential direction, and a driving bevel gear is rotatably arranged at the end of each positioning mechanism on the top of the mounting plate.
Preferably, positioning mechanism includes the mount, the bottom and the mounting panel fixed connection of mount, and the mount is close to the one end rotation of initiative bevel gear and installs driven bevel gear, initiative bevel gear and driven bevel gear joint, and driven bevel gear's one end runs through the mount and is connected with the thread cylinder.
Preferably, the one end swing joint that the mount is close to the through-hole has the support, the one end that the support is close to the mount is connected with the shank of bolt, the shank of bolt is connected in the inside of a screw thread section of thick bamboo, the tip of support all is connected with the guide bar in the both sides of shank of bolt, the guide bar activity is pegged graft in the inside of mount, spacing roller is installed to the other end of support, spacing roller is close to through-hole one side and is provided with the joint groove, the bottom of explosion vent shroud plate is connected with the pull rod, the below of pull rod is connected with two baffles, a baffle is in the top of another baffle, and be.
Preferably, the bottom of drive bevel gear runs through the mounting panel and is connected with the belt pulley, and the bottom of mounting panel rotates and installs a plurality of leading wheel, install a drive belt between a plurality of leading wheel and the belt pulley, and the motor is installed to the bottom of one of them leading wheel, the inside diameter direction that is provided with the sliding tray of mounting panel, the inside slidable mounting of sliding tray has the joint board, the upper portion of joint board rotates installs the take-up pulley, one side and the drive belt butt of take-up pulley, one side of joint board rotates through the bearing and is connected with adjusting bolt, adjusting bolt sets up along the length direction of sliding tray, and the edge of the protruding mounting panel of one end of adjusting bolt, and with mounting.
Preferably, the specific steps of the use of the mine explosion vent comprise:
the method comprises the following steps: when the explosion-proof door is used, the oil cylinder pushes the explosion-proof door shroud plate to cover the upper part of the ventilation well mouth, and the four explosion-proof door shroud plates are in a closed state under the combined action of the dead weight, the negative pressure suction force and the oil cylinder of the explosion-proof door; the oil-resistant rubber plate plays a role in sealing in use, and gas in a well cannot leak;
step two: the gas sensor detects the gas content during working, and when the detected gas content is greater than a set value, the electromagnetic discharge valve opens to discharge the gas inside the explosion-proof door, so that the content of the gas inside the explosion-proof door is reduced; when the detected gas content is less than a set value, closing the electromagnetic discharge valve;
step three: when explosion occurs, the negative pressure in the air shaft is reduced or changed into positive pressure, when the negative pressure in the air shaft is changed into positive pressure, the upward pressure generates thrust on the oil cylinder, when the thrust on the oil cylinder is greater than a set value, a safety valve in a hydraulic system connected with the oil cylinder releases pressure, hydraulic oil in a rear cavity of the oil cylinder drains oil to an oil tank to form a loop, a piston rod is retracted under the action of the positive pressure, and the four explosion-proof door cover plates can be opened to discharge gas outwards; when explosion happens, after the negative pressure in the air shaft is reduced to a set value, the hydraulic system is started, so that the oil cylinder pulls the explosion-proof door shroud plate to lift up, and the circulation of air is accelerated;
step four: after the explosion danger is relieved and ventilation is recovered, the oil cylinder operates, the explosion door covering plate is closed, and the ventilation shaft is sealed; when the wind is against, the oil cylinder runs, the explosion door shroud plate is closed, and the oil cylinder is locked; the positioning mechanism is used for supporting the explosion-proof door shroud plate, so that the force applied to the oil cylinder during working is reduced; when the negative pressure in the ventilation shaft is high, the positioning mechanism can be started to operate, and the limiting roller supports the explosion door covering plate at the lower part;
step five: when the positioning mechanism is driven, the motor at the bottom of the guide wheel drives the guide wheel to rotate, and the guide wheel drives the belt pulley to rotate through the transmission belt, so that the driving bevel gear is driven to rotate; the initiative bevel gear drives driven bevel gear and rotates, and a screw thread section of thick bamboo rotates thereupon together, and then drives the shank of bolt and remove in the inside of a screw thread section of thick bamboo, and the shank of bolt promotes support and spacing roller on the upper portion of mounting panel, and until the inside joint groove joint of spacing roller between two baffles, the pull rod receives the restriction of spacing roller, and the rigidity of pull rod can not reciprocate.
The invention has the beneficial effects that:
1. the sealing is realized by adopting rubber sealing, the sealing surface is wide, the sealing can be effectively realized, and the air leakage is avoided. The problems of liquid volatilization of liquid seal and freezing in winter are solved, the influence of seasons on the seal is small, and the liquid does not need to be supplemented.
2. The corrosion of the sealed liquid to the explosion door is overcome.
3. The explosion vent is opened more easily, adopts intelligent control system, and the operation of control hydro-cylinder for the explosion vent can be according to the quick opening and closing of demand of reality, and work efficiency obtains improving, and the security in the use obtains promoting.
4. The four-piece explosion door shroud plate is of a split structure, so that the explosion door can be opened more easily, and the explosion door cannot be exploded to fly when gas explosion is guaranteed, so that the quick reset is guaranteed. The explosion door shroud plate can be freely opened and closed, is not easy to be jacked by airflow during explosion, is not easy to damage, can be repeatedly used, and saves cost.
5. The anti-wind device of explosion vent is equipped with hydraulic locking device, and the locking force can be adjusted as required, can realize the quick locking of explosion vent, satisfies the time requirement of tunnel anti-wind. And the positioning mechanism inside can support the explosion door when the negative pressure is large and the wind is against the wind, so that the whole explosion door is not easy to damage, and the service life is prolonged.
6. When the positioning mechanism operates, one motor can drive all the driving bevel gears and the driven bevel gears to rotate, so that the four groups of limiting rollers can move simultaneously, the moving speeds are the same, the control is convenient, and the working efficiency is improved. When the support moves, the guide rods on the two sides move in the fixing frame, so that the support can move more stably and is not easy to shake. And the tightness of the transmission belt can be freely adjusted. And screwing the adjusting bolt to drive the clamping plate to move in the sliding groove, and then driving the tensioning wheel to adjust the tightness of the transmission belt.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the mounting structure of the inner support frame of the present invention.
FIG. 3 is a schematic view of the mounting structure of the cover plate and the base frame of the explosion vent of the present invention.
FIG. 4 is a schematic view of the mounting structure of the mounting plate and the base frame according to the present invention.
FIG. 5 is a schematic view of the structure of the mounting plate of the present invention.
FIG. 6 is a schematic view of a positioning mechanism according to the present invention.
Fig. 7 is a schematic view of a tie bar mounting structure of the present invention.
Fig. 8 is a schematic view of the tensioner mounting structure of the present invention.
In the figure: 1. a main joist; 2. an explosion vent shroud plate; 3. an annular seal groove; 4. an explosion vent base; 5. a weight; 6. a weight frame; 7. an oil cylinder; 8. an oil-resistant rubber sheet; 9. a gas sensor; 10. an electromagnetic discharge valve; 11. a dome; 12. a dome cover; 13. an inner support frame; 14. an explosion vent frame; 15. a base frame; 16. a fixing plate; 17. a drive bevel gear; 18. mounting a plate; 19. a positioning mechanism; 20. a sliding groove; 21. adjusting the bolt; 22. a belt pulley; 23. a transmission belt; 24. a guide wheel; 25. a tension wheel; 26. a limiting roller; 27. a threaded barrel; 28. a bolt shank; 29. a support; 30. a clamping groove; 31. a fixed mount; 32. a guide bar; 33. a driven bevel gear; 34. a pull rod; 35. a bearing; 36. the joint board.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the lotus-shaped mine explosion vent comprises a base frame 15 and four explosion vent bodies, wherein each explosion vent body consists of four fan-shaped explosion vent covering plates 2, an oil cylinder 7 is rotatably mounted on one side of the upper part of each explosion vent covering plate 2, the base frame 15 is mounted on the upper part of a ventilation shaft, a circle of explosion vent base 4 is arranged on the periphery of the ventilation shaft along the circumferential direction, the bottom end of the base frame 15 is fixedly connected with the explosion vent base 4, four weight frames 6 are mounted on the top of the explosion vent base 4, and the other end of the oil cylinder 7 is rotatably connected with one side of each weight frame 6;
the bottom of the explosion-proof door body is connected with an inner support frame 13, the top of the inner support frame 13 is provided with a dome 11, one side inside the dome 11 is provided with a gas sensor 9, the other side of the dome 11 is provided with a dome cover 12, the inside of the dome cover 12 is provided with an electromagnetic discharge valve 10, the outside of the inner support frame 13 is provided with an explosion-proof door frame 14, and the explosion-proof door covering plate 2 is fixedly installed with the inner support frame 13 through the explosion-proof door frame 14; the bottom end of the inner support frame 13 is hinged with the base frame 15, and oil-resistant rubber plates 8 are arranged in a connecting gap between the explosion door shroud plates 2 and a gap between the bottom of the explosion door shroud plate 2 and the base frame 15.
The outer connection of explosion door shroud plate 2 has main joist 1, and the bottom of the explosion door body and the junction of base frame 15 are provided with annular seal groove 3, and the internally mounted of annular seal groove 3 has resistant oily rubber slab 8, and resistant oily rubber slab 8 can play sealed effect in the work, and sealed performance is better.
The upper part of the weight frame 6 is provided with a pulley, a pull rope is arranged inside the top end of the pulley, one end of the pull rope is connected with one side of the upper part of the explosion door covering plate 2, and the other end of the pull rope is connected with a weight 5.
The top edge of the explosion door shroud plate 2 is tightly abutted with the outer side of the dome 11, and an oil-resistant rubber plate 8 is arranged at the joint of the explosion door shroud plate 2 and the dome 11.
The inside horizontal installation of base frame 15 has mounting panel 18, and the inner wall fixed connection of fixed plate 16 and base frame 15 is all passed through to the both sides of mounting panel 18, and the middle part of mounting panel 18 runs through along thickness direction and is provided with the through-hole, and the through-hole makes things convenient for pull rod 34 to run through from the inside of mounting panel 18.
Four positioning mechanisms 19 are evenly installed on the upper portion of the installation plate 18 outside the through hole along the circumferential direction, the top of the installation plate 18 is rotatably installed on the end portion of each positioning mechanism 19, the positioning mechanisms 19 can support the explosion door when negative pressure is large and wind is reversed, the explosion door is not prone to damage, and the service life of the explosion door is prolonged.
The positioning mechanism 19 comprises a fixed frame 31, the bottom of the fixed frame 31 is fixedly connected with the mounting plate 18, one end of the fixed frame 31, which is close to the drive bevel gear 17, is rotatably provided with a driven bevel gear 33, the drive bevel gear 17 is clamped with the driven bevel gear 33, one end of the driven bevel gear 33 penetrates through the fixed frame 31 and is connected with a threaded cylinder 27, and the drive bevel gear 17 can drive the driven bevel gear 33 to rotate in work.
The bottom of drive bevel gear 17 runs through mounting panel 18 and is connected with belt pulley 22, and the bottom of mounting panel 18 is rotated and is installed a plurality of leading wheel 24, install a drive belt 23 between a plurality of leading wheel 24 and the belt pulley 22, and the motor is installed to the bottom of one of them leading wheel 24, the inside diameter direction that is provided with of mounting panel 18 is provided with sliding tray 20, the inside slidable mounting of sliding tray 20 has joint board 36, the upper portion of joint board 36 is rotated and is installed take-up pulley 25, one side and the drive belt 23 butt of take-up pulley 25, one side of joint board 36 is rotated through bearing 35 and is connected with adjusting bolt 21, adjusting bolt 21 sets up along the length direction of sliding tray 20, and the one end of adjusting bolt 21 protrudes the edge of mounting panel 18, and.
The mine explosion vent comprises the following specific steps:
the method comprises the following steps: when the explosion-proof door is used, the oil cylinder 7 pushes the explosion-proof door shroud plates 2 to cover the upper part of a ventilation well mouth, and the four explosion-proof door shroud plates 2 are in a closed state under the combined action of the dead weight, the negative pressure suction force and the oil cylinder 7 of the explosion-proof door; the oil-resistant rubber plate 8 plays a role in sealing in use, and gas in a well cannot leak;
step two: the gas sensor 9 detects the gas content during the work, when the detected gas content is larger than a set value, the electromagnetic discharge valve 10 is opened to discharge the gas inside the explosion-proof door, and the content of the gas inside the explosion-proof door is reduced; when the detected gas content is less than the set value, the electromagnetic discharge valve 10 is closed;
step three: when explosion happens, the negative pressure in the air shaft is reduced or changed into positive pressure, when the negative pressure in the air shaft is changed into positive pressure, the upward pressure generates thrust on the oil cylinder 7, when the thrust on the oil cylinder 7 is greater than a set value, a safety valve in a hydraulic system connected with the oil cylinder 7 releases pressure, hydraulic oil in the rear cavity of the oil cylinder 7 drains oil to an oil tank to form a loop, a piston rod is retracted under the action of the positive pressure, and the four-piece explosion door shroud plate 2 can be opened to discharge gas outwards; when explosion happens, after the negative pressure in the air shaft is reduced to a set value, the hydraulic system is started, so that the oil cylinder 7 pulls the explosion door shroud plate 2 to be lifted, and the air circulation is accelerated;
step four: after the explosion danger is relieved and ventilation is recovered, the oil cylinder 7 operates, the explosion door shroud plate 2 is closed, and the ventilation shaft is sealed; when the wind is against, the oil cylinder 7 runs, the explosion door shroud plate 2 is closed, and the oil cylinder 7 is locked; the positioning mechanism 19 is used for supporting the explosion door shroud plate 2, so that the force applied to the oil cylinder 7 during working is reduced; when the negative pressure in the ventilation shaft is high, the positioning mechanism 19 can be started to operate, and the limiting roller 26 supports the explosion door shroud plate 2 at the lower part;
step five: when the positioning mechanism 19 is driven, the motor at the bottom of the guide wheel 24 drives the guide wheel 24 to rotate, and the guide wheel 24 drives the belt pulley 22 to rotate through the transmission belt 23, so as to drive the driving bevel gear 17 to rotate; the driving bevel gear 17 drives the driven bevel gear 33 to rotate, the thread cylinder 27 rotates along with the driving bevel gear, the bolt rod 28 is further driven to move inside the thread cylinder 27, the bolt rod 28 pushes the support 29 and the limiting roller 26 to be arranged on the upper portion of the mounting plate 18 until the clamping groove 30 in the limiting roller 26 is clamped between the two baffles, the pull rod 34 is limited by the limiting roller 26, and the position of the pull rod 34 is fixed and cannot move up and down.
When the explosion-proof door is used, concrete is poured around the ventilation shaft during installation, the concrete is used as an explosion-proof door foundation 4, and the oil cylinder 7 is connected with an external hydraulic station. During normal use, the oil cylinder 7 pushes the explosion door shroud plates 2 to cover the upper part of the ventilation well mouth, and the four explosion door shroud plates 2 are in a closed state under the combined action of the dead weight, the negative pressure suction force and the oil cylinder 7 of the explosion door. The oil-resistant rubber plate 8 plays a role in sealing in use, so that the sealing performance of the joint is good, and gas in the well cannot leak.
The gas sensor 9 detects gas content in the work, and when the gas content who detects was greater than the setting value, the inside gas of discharge explosion vent was opened to electromagnetism bleeder valve 10, reduces the content of inside gas, guarantees the inside safety of ventilation shaft, and after the gas content who detects was less than the setting value, electromagnetism bleeder valve 10 closed for electric drive convenient and fast more in the work, safe high-efficient.
When the explosion happens, the negative pressure in the air shaft is instantly reduced or changed into positive pressure, the negative pressure in the air shaft is instantly changed into positive pressure, upward pressure generates thrust to the oil cylinder 7, when the thrust received by the oil cylinder 7 is greater than a set value, a safety valve in a hydraulic system connected with the oil cylinder 7 is instantly decompressed, hydraulic oil in a rear cavity of the oil cylinder 7 drains oil to the oil tank to form a loop, a piston rod is withdrawn under the action of the positive pressure, the four-piece explosion door covering plate 2 is instantly opened, and gas can be rapidly and outwards discharged, so that the air flow impact force inside the air shaft is reduced. Because the oil drainage flow is certain, the oil cylinder 7 is used as a buffer at the moment, a good buffering effect is achieved, the safety of the explosion door shroud plate 2 is protected, and the explosion door shroud plate is not easy to deform. The deformation of the explosion door shroud plate 2 is reduced, and the repeated use of the explosion door is realized. The explosion door shroud plate 2 is not easy to be impacted by airflow to be jacked and lifted upwards in a rotating mode, so that the damage to nearby personnel after the explosion door shroud plate 2 flies can be avoided, and the safety performance is improved.
When explosion happens and the explosion power is small, the hydraulic system is started immediately after the negative pressure in the air shaft is instantly reduced to a set value, so that the oil cylinder 7 pulls the explosion-proof door shroud plate 2 to lift up, the circulation of air is accelerated, the gas in the explosion-proof door is quickly discharged outwards, and the reoccurrence of subsequent explosion can be avoided.
After the explosion danger is relieved and ventilation is recovered, the hydraulic station is started to enable the oil cylinder 7 to operate, the explosion door covering plate 2 is closed, and the ventilation shaft is sealed. During maintenance, the explosion door shroud plate 2 can be freely opened or closed by using the oil cylinder 7, so that convenience is provided for subsequent maintenance. And when the wind is against, starting the hydraulic station to enable the oil cylinder 7 to operate, closing the explosion door shroud plate 2, and locking the oil cylinder 7 by controllable pressure. And the positioning mechanism 19 is utilized to support the explosion door shroud plate 2, so that the force applied to the oil cylinder 7 during working is reduced, and the oil cylinder 7 is protected from being damaged easily.
When the positioning mechanism 19 is driven, the motor at the bottom of the guide wheel 24 drives the guide wheel 24 to rotate, and the guide wheel 24 drives the belt pulley 22 to rotate through the transmission belt 23, so as to drive the driving bevel gear 17 to rotate. The driving bevel gear 17 drives the driven bevel gear 33 to rotate, the thread cylinder 27 rotates along with the driving bevel gear, the bolt rod 28 is further driven to move inside the thread cylinder 27, the bolt rod 28 pushes the support 29 and the limiting roller 26 to be arranged on the upper portion of the mounting plate 18 until the clamping groove 30 in the limiting roller 26 is clamped between the two baffles, the pull rod 34 is limited by the limiting roller 26, and the position of the pull rod 34 is fixed and cannot move up and down. So that the limit roller 26 can bear a part of the force and reduce the load of the oil cylinder 7.
And when the internal negative pressure of the ventilation shaft is larger, the positioning mechanism 19 can also be started to operate, the limiting roller 26 can support the explosion door shroud plate 2 at the lower part, so that the explosion door shroud plate is safer in use, the pressure of the inner support frame 13 is reduced, the stress of the whole structure is better, and the service life is prolonged.
When the positioning mechanism 19 operates, one motor can drive all the driving bevel gears 17 and the driven bevel gears 33 to rotate, so that the four groups of limiting rollers 26 can move simultaneously, the moving speeds are the same, the control is convenient, and the working efficiency is improved. When the bracket 29 moves, the guide rods 32 on both sides move in the fixing frame 31, so that the bracket 29 can move more stably and is not easy to shake. And the tightness of the transmission belt 23 can be freely adjusted. The adjusting bolt 21 is screwed to drive the clamping plate 36 to move in the sliding groove 20, and further drive the tension wheel 25 to adjust the tightness of the transmission belt 23.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The lotus-shaped mine explosion door is characterized by comprising a base frame (15) and four explosion door bodies, wherein each explosion door body consists of four fan-shaped explosion door covering plates (2), an oil cylinder (7) is rotatably mounted on one side of the upper part of each explosion door covering plate (2), the base frame (15) is mounted on the upper part of a ventilation shaft, a circle of explosion door foundation (4) is arranged on the periphery of the ventilation shaft along the circumferential direction, the bottom end of the base frame (15) is fixedly connected with the explosion door foundation (4), four hammer frames (6) are mounted at the top of each explosion door foundation (4), and the other end of each oil cylinder (7) is rotatably connected with one side of each hammer frame (6);
the bottom of the explosion-proof door body is connected with an inner support frame (13), the top of the inner support frame (13) is provided with a dome (11), one side of the inside of the dome (11) is provided with a gas sensor (9), the other side of the dome (11) is provided with a dome cover (12), the inside of the dome cover (12) is provided with an electromagnetic discharge valve (10), the outside of the inner support frame (13) is provided with an explosion-proof door frame (14), and an explosion-proof door cover plate (2) is fixedly installed with the inner support frame (13) through the explosion-proof door frame (14); the bottom end of the inner support frame (13) is hinged with the base frame (15), and oil-resistant rubber plates (8) are arranged in a connecting gap between the explosion door shroud plates (2) and a gap between the bottom of the explosion door shroud plate (2) and the base frame (15).
2. The lotus-shaped mine explosion vent as claimed in claim 1, wherein the exterior of the explosion vent shroud plate (2) is connected with a main joist (1), an annular sealing groove (3) is arranged at the joint of the bottom of the explosion vent body and the base frame (15), and an oil-resistant rubber plate (8) is arranged inside the annular sealing groove (3).
3. The lotus-shaped mine explosion door as claimed in claim 1, wherein a pulley is mounted on the upper part of the weight frame (6), a pull rope is placed inside the top end of the pulley, one end of the pull rope is connected with one side of the upper part of the explosion door covering plate (2), and the other end of the pull rope is connected with a weight (5).
4. The lotus-shaped mine explosion vent as claimed in claim 1, characterized in that the top edge of the explosion vent shroud plate (2) is in tight abutment with the outside of the dome (11), and an oil-resistant rubber plate (8) is installed at the joint of the explosion vent shroud plate (2) and the dome (11).
5. The lotus-shaped mine explosion vent as claimed in claim 1, wherein a mounting plate (18) is horizontally mounted inside the base frame (15), both sides of the mounting plate (18) are fixedly connected with the inner wall of the base frame (15) through a fixing plate (16), and a through hole penetrates through the middle of the mounting plate (18) along the thickness direction.
6. The lotus-shaped mine explosion vent as claimed in claim 5, wherein the upper part of the mounting plate (18) is uniformly provided with four positioning mechanisms (19) at the outside of the through hole along the circumferential direction, and the top of the mounting plate (18) is rotatably provided with a drive bevel gear (17) at the end of each positioning mechanism (19).
7. The lotus-shaped mine explosion vent as claimed in claim 6, wherein the positioning mechanism (19) comprises a fixed frame (31), the bottom of the fixed frame (31) is fixedly connected with the mounting plate (18), a driven bevel gear (33) is rotatably mounted at one end of the fixed frame (31) close to the driving bevel gear (17), the driving bevel gear (17) is clamped with the driven bevel gear (33), and one end of the driven bevel gear (33) penetrates through the fixed frame (31) and is connected with a threaded barrel (27).
8. The lotus-shaped mine explosion door as claimed in claim 6, characterized in that one end of the fixing frame (31) close to the through hole is movably connected with a support (29), one end of the support (29) close to the fixing frame (31) is connected with a bolt rod (28), the bolt rod (28) is connected inside the threaded barrel (27), two sides of the bolt rod (28) at the end of the support (29) are respectively connected with a guide rod (32), the guide rods (32) are movably inserted into the fixing frame (31), a limiting roller (26) is installed at the other end of the support (29), one side of the limiting roller (26) close to the through hole is provided with a clamping groove (30), the bottom of the explosion door covering plate (2) is connected with a pull rod (34), two baffles are connected below the pull rod (34), one baffle is above the other baffle, and an annular groove matched with the clamping groove (30) is formed between the two baffles.
9. The lotus-shaped mine explosion vent as claimed in claim 6, characterized in that the bottom of the drive bevel gear (17) penetrates through the mounting plate (18) to be connected with a belt pulley (22), the bottom of the mounting plate (18) is rotatably provided with a plurality of guide wheels (24), a transmission belt (23) is arranged between the guide wheels (24) and the belt pulley (22), the bottom of one guide wheel (24) is provided with a motor, the mounting plate (18) is internally provided with a sliding groove (20) along the diameter direction, the sliding groove (20) is internally provided with a clamping plate (36) in a sliding manner, the upper part of the clamping plate (36) is rotatably provided with a tension wheel (25), one side of the tension wheel (25) is abutted against the transmission belt (23), one side of the clamping plate (36) is rotatably connected with an adjusting bolt (21) through a bearing (35), and the adjusting bolt (21) is arranged along the length direction of the sliding groove, and one end of the adjusting bolt (21) protrudes out of the edge of the mounting plate (18) and is in threaded connection with the mounting plate (18).
10. The lotus-shaped mine explosion door as claimed in claim 1, wherein the mine explosion door is used by the specific steps of:
the method comprises the following steps: when the explosion-proof door is used, the oil cylinder (7) pushes the explosion-proof door shroud plates (2) to cover the upper part of a ventilation well mouth, and the four explosion-proof door shroud plates (2) are in a closed state under the combined action of the dead weight, the negative pressure suction force and the oil cylinder (7) of the explosion-proof door; the oil-resistant rubber plate (8) plays a role in sealing in use, and gas in a well cannot leak;
step two: the gas sensor (9) detects the gas content during working, and when the detected gas content is larger than a set value, the electromagnetic discharge valve (10) opens and discharges the gas in the explosion-proof door, so that the content of the gas in the explosion-proof door is reduced; when the detected gas content is less than a set value, closing the electromagnetic discharge valve (10);
step three: when explosion happens, the negative pressure in the air shaft is reduced or changed into positive pressure, when the negative pressure in the air shaft is changed into positive pressure, the upward pressure generates thrust on the oil cylinder (7), when the thrust on the oil cylinder (7) is greater than a set value, a safety valve in a hydraulic system connected with the oil cylinder (7) releases pressure, hydraulic oil in the rear cavity of the oil cylinder (7) drains oil to the oil tank to form a loop, a piston rod is retracted under the action of the positive pressure, and the four explosion-proof door cover plates (2) can open to discharge gas outwards; when explosion happens, after the negative pressure in the air shaft is reduced to a set value, the hydraulic system is started, so that the oil cylinder (7) pulls the explosion door shroud plate (2) to be lifted, and the circulation of air is accelerated;
step four: after the explosion danger is relieved and ventilation is recovered, the oil cylinder (7) operates, the explosion door shroud plate (2) is closed, and the ventilation shaft is sealed; when the wind is against, the oil cylinder (7) runs, the explosion door shroud plate (2) is closed, and the oil cylinder (7) is locked; the positioning mechanism (19) is used for supporting the explosion door shroud plate (2), so that the force applied to the oil cylinder (7) during working is reduced; when the negative pressure in the ventilation shaft is high, the positioning mechanism (19) can be started to operate, and the limiting roller (26) supports the explosion door shroud plate (2) at the lower part;
step five: when the positioning mechanism (19) is driven, a motor at the bottom of the guide wheel (24) drives the guide wheel (24) to rotate, and the guide wheel (24) drives the belt pulley (22) to rotate through the transmission belt (23) so as to drive the driving bevel gear (17) to rotate; the driving bevel gear (17) drives the driven bevel gear (33) to rotate, the thread cylinder (27) rotates along with the thread cylinder, then the bolt rod (28) is driven to move in the thread cylinder (27), the bolt rod (28) pushes the support (29) and the limiting roller (26) to move on the upper portion of the mounting plate (18) until the clamping groove (30) in the limiting roller (26) is clamped between the two baffles, the pull rod (34) is limited by the limiting roller (26), and the pull rod (34) is fixed in position and cannot move up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311165.XA CN110886622A (en) | 2019-12-18 | 2019-12-18 | Lotus-shaped mine explosion door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311165.XA CN110886622A (en) | 2019-12-18 | 2019-12-18 | Lotus-shaped mine explosion door |
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| Publication Number | Publication Date |
|---|---|
| CN110886622A true CN110886622A (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911311165.XA Pending CN110886622A (en) | 2019-12-18 | 2019-12-18 | Lotus-shaped mine explosion door |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561349A (en) * | 2020-06-16 | 2020-08-21 | 詹继勇 | Mining area is from compound explosion vent for well immediately airing exhaust |
| CN111608715A (en) * | 2020-06-01 | 2020-09-01 | 中国矿业大学 | Explosion-proof pressure relief and energy storage reset air door with electromagnetic locking and unlocking and control method |
| CN113153407A (en) * | 2021-05-03 | 2021-07-23 | 内蒙古上海庙矿业有限责任公司 | Mine ventilation explosion-proof well lid |
| CN114542185A (en) * | 2022-02-25 | 2022-05-27 | 兖矿能源集团股份有限公司兴隆庄煤矿 | Automatic lifting system for explosion-proof cap of air shaft of coal mine |
-
2019
- 2019-12-18 CN CN201911311165.XA patent/CN110886622A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608715A (en) * | 2020-06-01 | 2020-09-01 | 中国矿业大学 | Explosion-proof pressure relief and energy storage reset air door with electromagnetic locking and unlocking and control method |
| CN111608715B (en) * | 2020-06-01 | 2021-05-28 | 中国矿业大学 | Explosion-proof pressure relief and energy storage reset air door with electromagnetic locking and unlocking and control method |
| CN111561349A (en) * | 2020-06-16 | 2020-08-21 | 詹继勇 | Mining area is from compound explosion vent for well immediately airing exhaust |
| CN111561349B (en) * | 2020-06-16 | 2022-02-25 | 詹继勇 | Mining area is from compound explosion vent for well immediately airing exhaust |
| CN113153407A (en) * | 2021-05-03 | 2021-07-23 | 内蒙古上海庙矿业有限责任公司 | Mine ventilation explosion-proof well lid |
| CN113153407B (en) * | 2021-05-03 | 2023-08-15 | 内蒙古上海庙矿业有限责任公司 | Mine ventilation explosion-proof well lid |
| CN114542185A (en) * | 2022-02-25 | 2022-05-27 | 兖矿能源集团股份有限公司兴隆庄煤矿 | Automatic lifting system for explosion-proof cap of air shaft of coal mine |
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