CN107152301B - A kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof door - Google Patents
A kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof door Download PDFInfo
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- CN107152301B CN107152301B CN201710610739.8A CN201710610739A CN107152301B CN 107152301 B CN107152301 B CN 107152301B CN 201710610739 A CN201710610739 A CN 201710610739A CN 107152301 B CN107152301 B CN 107152301B
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- 238000004880 explosion Methods 0.000 title claims abstract description 140
- 238000013022 venting Methods 0.000 title claims abstract description 99
- 239000003245 coal Substances 0.000 title claims abstract description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000000428 dust Substances 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 5
- 241000357293 Leptobrama muelleri Species 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
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- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Classifications
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/16—Shaft covers
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Special Wing (AREA)
- Hinges (AREA)
Abstract
The invention discloses a kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof doors, including canopy-type door body and leading explosion venting device；Leading explosion venting device includes venting of dust explosion lid, pedestal, hinge seat, reset spring and inverted ventilation lock；Venting of dust explosion lid includes metal cover board, the sealing block and cushion for being bonded in metal cover board or more plate face；Metal cover board side is provided with articulated joint, and articulated joint is hinged on hinge seat by hinged shaft；The coil portion of reset spring is set on the hinged shaft of hinge seat, and one pin is fixed in articulated joint, and another pin is overlapped on hinge seat；Inverted ventilation lock includes the lock tongue on locked groove and metal cover board on pedestal, is placed equidistant with several trapezoidal venting of dust explosion holes around center circumferential in canopy-type door body, the lower end of pedestal is weldingly fixed on the periphery in venting of dust explosion hole, and hinge seat is weldingly fixed in canopy-type door body.When carrying out upgrading to existing explosion proof door using explosion venting device of the invention, it is only necessary to be transformed to canopy-type door body, project amount is small, and expense is low.
Description
Technical field
The present invention relates to mining ventilation and safety technical fields, more particularly to a kind of leading venting of dust explosion of explosion-proof door of coal miine vertical shaft
Device and explosion proof door, for improving the explosion-proof performance of existing vertical ventilating shaft explosion-proof door.
Background technique
Explosion Door of Air Shaft is the important safety facility for protecting mine main ventilator, and action principle is to utilize punching
Wave rectilinear propagation properties are hit, the impact air-flow that well shooting of quickly releasing generates, to reduce explosion wave to main fan
Destruction.
Currently, China's coal-mine stand ventilating shaft generally use a kind of canopy-type explosion proof door, it by canopy-type door body, sealing oil groove,
The composition such as pulley yoke, counterweight.This explosion proof door is introduced by the former Soviet Union earliest, and design is by former Wuhan Colliery Designing Institute in last century
60, the seventies establishment and revision, through former Ministry of Coal Industry examine and revise as standard design, be incorporated into " coal special equipment atlas ", continue to use to
It is modern.Lot of accident confirms the type explosion proof door there are major defect, and outstanding behaviours is that antiknock ability is low, poor reliability, easily causes thing
Therefore it magnifies.Explosion proof door stress in rising and dropping process is often unbalanced, and canopy-type door body is easy to happen offset, deflection,
Lower backwardness is difficult to self-resetting, causes largely to leak out or even Air escape branch；When brisance is powerful, explosion proof door by punching fly and
Far from well head, underground main ventilation system can not be restored for a long time, lead to a large amount of underground distress personnel Poisoning chokes and injures and deaths, cause
Fault spread.
For the technological deficiency of existing vertical ventilating shaft explosion-proof door, the country proposes numerous Novel anti-explosion door of vertical air shaft, generally from
Guiding, buffering, limit etc. come enhance explosion proof door explosion-resistance characteristic and reset reliability.Due to not yet forming mandatory technology
Standard, and construction upgrade cost is relatively high, Novel anti-explosion door of vertical air shaft promotes more difficulty, and there are major defect and safety are hidden
The existing vertical ventilating shaft explosion-proof door technology suffered from is still commonly used.
Summary of the invention
Present invention aims at existing vertical ventilating shaft explosion-proof door there are aiming at the problem that and defect, it is existing to propose that one kind is additional to
Leading explosion venting device on vertical ventilating shaft explosion-proof door.When explosion time occurs, explosion venting device is opened in advance and is discharged explosion energy, subtracts
The blast impulse that few explosion proof door is subject to, to enhance its explosion-proof capabilities and security reliability.
The purpose of the invention is achieved by the following technical solution:
A kind of leading explosion venting device for explosion-proof door of coal miine vertical shaft, including venting of dust explosion lid, pedestal, hinge seat, reset bullet
Spring, inverted ventilation lock；The venting of dust explosion lid includes metal cover board, the sealing block for being bonded in metal cover board lower face and is bonded in metal cover board
The cushion of upper face；The pedestal is steel back taper cylinder, and the sealing block is the mesa-shaped body with pedestal close fit；It is described
Metal cover board side is provided with articulated joint, and the articulated joint is hinged on hinge seat by hinged shaft；The spring coil of the reset spring
Part is set on the hinged shaft of hinge seat, and one pin is fixed in the articulated joint of the metal cover board, and another pin is overlapped on
On hinge seat；The inverted ventilation lock includes that the lock on metal cover board is arranged in corresponding locked groove position in the locked groove being arranged on the base
Tongue.
Further, the metal cover board is light-high-strength metal material, and the sealing block is rubber material, described slow
Punching pad is made of padded coaming.
Preferably, the cushion is plain cushion or wedge piece.
Further, the pedestal cross section is one of round, trapezoidal, fan-shaped, and the inside of the pedestal is light
Sliding curved surface, the pedestal upper end is provided with the brim of a hat shape support ring.
A kind of explosion proof door containing above-mentioned leading explosion venting device, further includes canopy-type door body, around umbrella in the canopy-type door body
Lid formula door body center circumferential is placed equidistant with several venting of dust explosion holes, and the lower end of the pedestal of the leading explosion venting device is weldingly fixed on venting of dust explosion
The hinge seat on the periphery in hole, the leading explosion venting device is weldingly fixed in canopy-type door body.
Further, the shape in the venting of dust explosion hole is one kind of the regular shapes such as round, trapezoidal, fan-shaped, the pedestal
Cross-sectional shape is consistent with the shape in venting of dust explosion hole.
The present invention compared with the prior art, have the following advantages that and the utility model has the advantages that
1, it by installing explosion venting device additional in existing vertical ventilating shaft explosion-proof door canopy-type door body, constitutes large and small valve collaboration and lets out
Quick-fried system, little moveable door i.e. explosion venting device that is strong by antiknock ability and being easy to repair are released blast pressure and energy in advance, to subtract
Small antiknock ability is weak and is difficult to the blast impulse that the i.e. existing vertical ventilating shaft explosion-proof door of the big valve repaired is subject to, to enhance existing vertical wind
The explosion-proof capabilities and security reliability of well explosion proof door.
2, explosion venting device uses clam shell design, and structure is simple, and venting of dust explosion mode is reasonable, itself capability of antidetonance is preferable, is not easy
By impact failure.When brisance is big, and part explosion venting device damages, emergency disposal measure is simple and easy.
3, explosion venting device pedestal (2) and sealing block (102) use rotary table/terrace with edge structure, are easy to guarantee that device resets and close
Seal quality.Under the action of divulging information negative pressure, explosion venting device has the characteristics that self-locking seal, i.e. negative pressure is bigger, seals tighter.
4, explosion venting device venting of dust explosion lid (1) automatically resets under reset spring (4) and gravity, and inverted ventilation lock (5) is being divulged information
It can voluntarily be locked under suction function, be not required to manual intervention, the original operation sequence for adding explosion proof door after leading explosion venting device is constant.
When carrying out upgrading to existing explosion proof door using explosion venting device of the invention, it is only necessary to change to canopy-type door body
It makes, project amount is small, and expense is low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of round explosion venting device of the invention.
Fig. 2 is the structural schematic diagram of the trapezoidal explosion venting device of the present invention.
Fig. 3 is the structural schematic diagram of venting of dust explosion cover in the present invention.
Fig. 4 is the mounting arrangements schematic diagram of round explosion venting device closed state of the invention.
Fig. 5 is the mounting arrangements schematic diagram of round explosion venting device open state of the invention.
Fig. 6 is the mounting arrangements schematic diagram of trapezoidal explosion venting device closed state of the invention.
Fig. 7 is the mounting arrangements schematic diagram of trapezoidal explosion venting device open state of the invention.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment one
As shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 5, a kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof door, including
Canopy-type door body (M) and leading explosion venting device；
The leading explosion venting device includes venting of dust explosion lid (1), pedestal (2), hinge seat (3), reset spring (4), inverted ventilation lock
(5)；The venting of dust explosion lid (1) includes metal cover board (101), the sealing block (102) for being bonded in metal cover board (101) lower face and glues
Connect the cushion (103) in metal cover board (101) upper face；The pedestal (2) is steel back taper cylinder, the sealing block
It (102) is the mesa-shaped body with pedestal (2) close fit；Metal cover board (101) side is provided with articulated joint (105), described
Articulated joint (105) is hinged on hinge seat (3) by hinged shaft；The coil portion of the reset spring (4) is set on hinge seat (3)
Hinged shaft on, one pin is fixed in the articulated joint (105) of the metal cover board (101), and another pin is overlapped on hinge seat
(3) on；The inverted ventilation lock (5) includes that the locked groove (502) being arranged on pedestal (2) and corresponding locked groove (502) position are arranged in gold
Belong to the lock tongue (501) on cover board (101), the metal cover board (101) is light-high-strength metal material, the sealing block
It (102) is rubber material, the cushion (103) is made of padded coaming, and the cushion (103) is plain cushion or wedge piece,
The inside of the pedestal (2) is smooth surface, and pedestal (2) upper end is provided with the brim of a hat shape support ring.
Several round venting of dust explosion holes are placed equidistant with around canopy-type door body (M) center circumferential on the canopy-type door body (M), it is described
The lower end of the pedestal (2) of leading explosion venting device is weldingly fixed on the periphery in venting of dust explosion hole, the hinge seat (3) of the leading explosion venting device
It is weldingly fixed on canopy-type door body (M), pedestal (2) cross-sectional shape is circle.
Embodiment two
As shown in Fig. 2, Fig. 3, Fig. 6 and Fig. 7, a kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof door, including
Canopy-type door body (M) and leading explosion venting device；
The leading explosion venting device includes venting of dust explosion lid (1), pedestal (2), hinge seat (3), reset spring (4), inverted ventilation lock
(5)；The venting of dust explosion lid (1) includes metal cover board (101), the sealing block (102) for being bonded in metal cover board (101) lower face and glues
Connect the cushion (103) in metal cover board (101) upper face；The pedestal (2) is steel back taper cylinder, the sealing block
It (102) is the mesa-shaped body with pedestal (2) close fit；Metal cover board (101) side is provided with articulated joint (105), described
Articulated joint (105) is hinged on hinge seat (3) by hinged shaft；The coil portion of the reset spring (4) is set on hinge seat (3)
Hinged shaft on, one pin is fixed in the articulated joint (105) of the metal cover board (101), and another pin is overlapped on hinge seat
(3) on；The inverted ventilation lock (5) includes that the locked groove (502) being arranged on pedestal (2) and corresponding locked groove (502) position are arranged in gold
Belong to the lock tongue (501) on cover board (101), the metal cover board (101) is light-high-strength metal material, the sealing block
It (102) is rubber material, the cushion (103) is made of padded coaming, and the cushion (103) is plain cushion or wedge piece,
The inside of the pedestal (2) is smooth surface, and pedestal (2) upper end is provided with the brim of a hat shape support ring.
Several trapezoidal venting of dust explosion holes are placed equidistant with around canopy-type door body (M) center circumferential on the canopy-type door body (M), it is described
The lower end of the pedestal (2) of leading explosion venting device is weldingly fixed on the periphery in venting of dust explosion hole, the hinge seat (3) of the leading explosion venting device
It is weldingly fixed on canopy-type door body (M), pedestal (2) cross-sectional shape is trapezoidal.
It is explosion-proof in existing canopy-type when being transformed using leading explosion venting device of the invention to existing canopy-type explosion proof door
In the door body (M) of door, several venting of dust explosion holes are equidistantly excavated on the circumference concentric with door body (M).The number of openings and aperture are total
Area is determined according to the structure snd size of door body (M)；Hole shape can be round, trapezoidal etc.；Position of opening avoids door body (M)
Supporting member.Explosion venting device pedestal (2) is welded on door body (M) along venting of dust explosion hole edge, then nearby welds installation in pedestal (2)
Hinge seat (3) then loads onto venting of dust explosion lid (1) and reset spring (4), that is, completes the installation of explosion venting device.
Under normal ventilation state, explosion venting device is in closed state, the sealing of venting of dust explosion lid (1) under suction function of divulging information
Block (102) is with base internal wall mutual extrusion, and contact is closely knit, so that explosion venting device is tightly air tight.In normal ventilation, inverted ventilation lock
(5) it is in normal lock status.When mine needs to occur inverted ventilation, because explosion venting device has been in locking state, therefore it is not required to fill venting of dust explosion
It sets and carries out additional inverted ventilation preparation work.
When explosion time occurs for underground, explosion wave washes the venting of dust explosion lid (1) of explosion venting device open first, blast impulse air-flow from
Venting of dust explosion hole sprays, and the very fast decline of blast pressure that explosion proof door door body (M) is subject to, blast pressure and explosion energy are released.Together
When, explosion proof door door body (M) is also gradually opened under Blast Shock.Within the most of the time that explosion proof door door body (M) is opened,
Venting of dust explosion hole is in open state, quite a few explosion energy is discharged by venting of dust explosion hole, so that the explosion that explosion proof door door body M is subject to
Impact greatly weakens.After explosion, the venting of dust explosion lid (1) of explosion venting device is covered again and is let out under reset spring (4) and gravity
Blast hole.After explosion proof door door body (M) resets and restores ventilation, under suction function of divulging information, venting of dust explosion lid (1) further obturages venting of dust explosion
Hole, while inverted ventilation lock (5) also automatically lock again.When explosion time, explosion venting device and explosion proof door door body (M) weight occur again for underground
Multiple above-mentioned venting of dust explosion and homing action, enable explosion venting device to be subjected to continuous blast impulse.
When explosion venting device is damaged in explosion, venting of dust explosion hole, Huo Zheyong can be blocked on the base with provisional serum cap button
The lay-by materials such as aluminium foil cloth block, and after the exclusion of underground dangerous situation, then replace impaired explosion venting device.
In conclusion description through this embodiment, can make those skilled in the art's better implementation this programme.
Claims (7)
1. a kind of leading explosion venting device for explosion-proof door of coal miine vertical shaft, it is characterised in that: including venting of dust explosion lid (1), pedestal
(2), hinge seat (3), reset spring (4), inverted ventilation lock (5)；
The venting of dust explosion lid (1) includes metal cover board (101), the sealing block (102) for being bonded in metal cover board (101) lower face and glues
Connect the cushion (103) in metal cover board (101) upper face；
The pedestal (2) is steel back taper cylinder, and the sealing block (102) is the mesa-shaped body with pedestal (2) close fit；
Metal cover board (101) side is provided with articulated joint (105), and the articulated joint (105) is hinged on hinge by hinged shaft
On seat (3)；
The coil portion of the reset spring (4) is set on the hinged shaft of hinge seat (3), and one pin is fixed on the metal cover
In the articulated joint (105) of plate (101), another pin is overlapped on hinge seat (3)；
The inverted ventilation lock (5) includes that the locked groove (502) being arranged on pedestal (2) and corresponding locked groove (502) position are arranged in metal
Lock tongue (501) on cover board (101).
2. a kind of leading explosion venting device for explosion-proof door of coal miine vertical shaft according to claim 1, it is characterised in that: institute
Stating metal cover board (101) is light-high-strength metal material, and the sealing block (102) is rubber material, the cushion (103)
It is made of padded coaming.
3. a kind of leading explosion venting device for explosion-proof door of coal miine vertical shaft according to claim 1 or 2, feature exist
In: the cushion (103) is plain cushion or wedge piece.
4. a kind of leading explosion venting device for explosion-proof door of coal miine vertical shaft according to claim 1, it is characterised in that: institute
Stating pedestal (2) cross section is one of round, trapezoidal, fan-shaped, and the inside of the pedestal (2) is smooth surface.
5. a kind of leading explosion venting device for explosion-proof door of coal miine vertical shaft according to claim 1 or 4, feature exist
In: pedestal (2) upper end is provided with the brim of a hat shape support ring (104).
6. a kind of explosion proof door containing leading explosion venting device described in 5 any one of Claims 1 to 5, further includes canopy-type door body
(M), it is characterised in that: several venting of dust explosion holes are placed equidistant with around canopy-type door body (M) center circumferential on the canopy-type door body (M),
The lower end of the pedestal (2) of the leading explosion venting device is weldingly fixed on the periphery in venting of dust explosion hole, the hinge of the leading explosion venting device
Seat (3) is weldingly fixed on canopy-type door body (M).
7. explosion proof door according to claim 6, it is characterised in that: the shape in the venting of dust explosion hole is in round, trapezoidal, fan-shaped
One kind, the cross-sectional shape of the pedestal (2) is consistent with the shape in venting of dust explosion hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710610739.8A CN107152301B (en) | 2017-07-25 | 2017-07-25 | A kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710610739.8A CN107152301B (en) | 2017-07-25 | 2017-07-25 | A kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107152301A CN107152301A (en) | 2017-09-12 |
| CN107152301B true CN107152301B (en) | 2019-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710610739.8A Active CN107152301B (en) | 2017-07-25 | 2017-07-25 | A kind of leading explosion venting device of explosion-proof door of coal miine vertical shaft and explosion proof door |
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| Country | Link |
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| CN (1) | CN107152301B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533306B (en) * | 2018-03-23 | 2019-10-08 | 山东省田庄煤矿有限公司 | A kind of explosion-proof cover locking device of vertical ventilating shaft |
| CN110067587B (en) * | 2019-05-28 | 2023-08-15 | 河南理工大学 | Vertical shaft explosion door system capable of automatically resetting and explosion-proof method |
| CN110671027B (en) * | 2019-09-27 | 2020-09-08 | 河南理工大学 | Energy intercepting type mine explosion wave reduction device |
| CN111810217B (en) * | 2020-07-22 | 2022-02-01 | 河南理工大学 | Auxiliary explosion-proof system for coal mine air shaft |
| CN112901242B (en) * | 2021-03-13 | 2023-05-16 | 河南理工大学 | Auxiliary explosion door system for coal mine air shaft air guide chamber |
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| DE1086651B (en) * | 1958-01-30 | 1960-08-11 | Siemag Maschinen U Stahlbau Ne | Manhole cover that can be raised and lowered again for mine shafts |
| CN102410044A (en) * | 2011-07-14 | 2012-04-11 | 鸡西司瑞电气有限公司 | Vertical ventilating shaft explosion door capable of automatically resetting after blast release and pressure relief |
| CN102733731A (en) * | 2012-07-12 | 2012-10-17 | 徐州中矿奥特麦科技有限公司 | Automatic on-and-off gravity type anti-explosion door |
| CN202756005U (en) * | 2012-08-17 | 2013-02-27 | 扬州鑫生科技发展有限公司 | Safe explosion-proof decompression type fan cover |
| CN202946182U (en) * | 2012-12-14 | 2013-05-22 | 中煤科工集团重庆研究院 | Mine pressure relief damper with enhanced air impact resistance |
| CN103306704A (en) * | 2013-06-09 | 2013-09-18 | 山东科技大学 | Vertical ventilating shaft anti-explosion door and method for relieving pressure safely and performing ventilation quickly by using door |
| CN103953382A (en) * | 2014-04-22 | 2014-07-30 | 扬州市江隆矿业设备有限公司 | Pressure releasing automatic reset air shaft anti-explosion cover |
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2017
- 2017-07-25 CN CN201710610739.8A patent/CN107152301B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1086651B (en) * | 1958-01-30 | 1960-08-11 | Siemag Maschinen U Stahlbau Ne | Manhole cover that can be raised and lowered again for mine shafts |
| CN102410044A (en) * | 2011-07-14 | 2012-04-11 | 鸡西司瑞电气有限公司 | Vertical ventilating shaft explosion door capable of automatically resetting after blast release and pressure relief |
| CN102733731A (en) * | 2012-07-12 | 2012-10-17 | 徐州中矿奥特麦科技有限公司 | Automatic on-and-off gravity type anti-explosion door |
| CN202756005U (en) * | 2012-08-17 | 2013-02-27 | 扬州鑫生科技发展有限公司 | Safe explosion-proof decompression type fan cover |
| CN202946182U (en) * | 2012-12-14 | 2013-05-22 | 中煤科工集团重庆研究院 | Mine pressure relief damper with enhanced air impact resistance |
| CN103306704A (en) * | 2013-06-09 | 2013-09-18 | 山东科技大学 | Vertical ventilating shaft anti-explosion door and method for relieving pressure safely and performing ventilation quickly by using door |
| CN103953382A (en) * | 2014-04-22 | 2014-07-30 | 扬州市江隆矿业设备有限公司 | Pressure releasing automatic reset air shaft anti-explosion cover |
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| Publication number | Publication date |
|---|---|
| CN107152301A (en) | 2017-09-12 |
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