CN106763946B - Extinguishing flame delay-self-closing pressure-relief explosion-proof door - Google Patents
Extinguishing flame delay-self-closing pressure-relief explosion-proof door Download PDFInfo
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- CN106763946B CN106763946B CN201611245707.4A CN201611245707A CN106763946B CN 106763946 B CN106763946 B CN 106763946B CN 201611245707 A CN201611245707 A CN 201611245707A CN 106763946 B CN106763946 B CN 106763946B
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- flame
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- 239000000919 ceramic Substances 0.000 claims abstract description 28
- 238000004880 explosion Methods 0.000 claims abstract description 20
- 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 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 239000002360 explosive Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000035939 shock Effects 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 7
- 238000013022 venting Methods 0.000 abstract description 7
- 238000005496 tempering Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241000252254 Catostomidae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mechanical Engineering (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The present invention relates to a kind of novel extinguishing flame delay-self-closing pressure-relief explosion-proof doors, belong to venting of dust explosion field of explosion.Including：Pedestal, bolt, flange, woven wire, foamed ceramics, contact-making switch, guide rod, head cover, spring, time switch, electromagnet, explosion-proof sucker.The extinguishing flame attenuation superpressure integral structure of the present invention can effectively reduce the size of the pressure of pressure-relief explosion-proof door exit shock wave so that the flame size that exit propagates out obviously weakens or even extinguishing.The present invention delay-self-closing function enable burning, explosion generate flame and shock wave have abundance time decrease, extinguishing and release；And the exit opening time of releasing is can be adjusted according to the needs, different grades of explosion accident is coped with, it is applied widely.The extinguishing flame attenuation superpressure integral structure of the present invention can also effectively prevent the generation of tempering phenomenon；And due to the structure using integrated design, installs, dismantles and replace very convenient during use.
Description
Technical field
The present invention relates to a kind of novel extinguishing flame delay-self-closing pressure-relief explosion-proof doors, belong to venting of dust explosion field of explosion.
Background technology
The pressure-resistant equipments such as pressure piping and pressure vessel are equipment very common during modern industrial production, this kind of to set
It is standby in use since inside is constantly in larger superpressure state, especially store and convey some imflammable gas and
During dust, often because explosion accident occurs more than pressure threshold.Pressure-relief explosion-proof door is to prevent such accident to occur
With the important equipment for mitigating Accidents Disasters.
It is equipped in all kinds of pressure-resistant equipments that the enterprises such as current coal mine, thermal power plant, all kinds of chemical plant use anti-
Quick-fried door.Currently used pressure-relief explosion-proof door is mainly the following：One is make pressure-relief explosion-proof door by the effect of gravity
Lidstock is at venting of dust explosion mouth, but since it is being applied so the mode to installation requires by the principle of gravity
During very have limitation.Another common venting of dust explosion mouth device is venting of dust explosion piece, but since venting of dust explosion piece is using upper
Nonrepeatability so that need to frequently replace, be inconvenient in use.
Also enable pressure-relief explosion-proof door self-return one is the elastic force using spring, but due to spring force without
Method is adjusted so that the time of return is unable to control so that will appear in use since pressure-relief explosion-proof door closes height too early
Warm high pressure gas and flame are released not exclusively, pressure-relief explosion-proof door either occur and can not close or close slow to cause air a large amount of
Subsequent explosion accident is caused into pressure vessel or pipeline.And above-mentioned several bleeders do not have extinguishing flame and subtract
The flame of high temperature and pressure and gas are only simply directly released to work by the problem of small exit positive pressure of shock wave magnitude function
Industry space, it is most likely that the equipment and operating personnel on periphery are damaged.For releasing the time for existing pressure-relief explosion-proof door
The problem of being unable to control, by being drawn a conclusion using the research of self-developed numerical simulation software, pipeline Flame Propagation exists
For shock wave preceding, the posterior rule of flame, maximum pressure is generally present in flame front.Traditional pressure-relief explosion-proof door weakens in pressure
Afterwards, just rapid self-return, but flame is released completely not yet at this time, easily causes flame passback, subsequent explosion occurs.
Invention content
The invention aims to solve, existing pressure-relief explosion-proof door venting duration is uncontrollable to lead to subsequent explosion, Yi Jiwu
At method extinguishing flame and damping vent the problem of positive pressure of shock wave, extinguishing flame delay-self-closing pressure-relief explosion-proof door is provided.
The purpose of the present invention is what is be achieved through the following technical solutions.
The present invention discloses a kind of extinguishing flame delay-self-closing pressure-relief explosion-proof door, including：Pedestal, bolt, flange, wire
Net, foamed ceramics, contact-making switch, guide rod, head cover, spring, time switch, electromagnet, explosion-proof sucker.
Woven wire is laid on the both ends of foamed ceramics；It is clamped by two flanges, and there is bolt to fix, composition extinguishing fire
Flame decaying superpressure integral structure, easy to disassemble during use and replacement；On the one hand woven wire plays segmentation, extinguishing flame
Purpose, on the one hand play the effect of fixed foam ceramics, prevent the foamed ceramics that may be crushed in impact process splash.
The side of extinguishing flame attenuation superpressure integral structure is bolted with outlet of releasing；The other side passes through bolt
It is fixedly connected with pedestal；Outlet release with the cyclic structure that sectional area is trapezoidal convex, to be used to support explosion-proof sucker；Pedestal
For cyclic structure, pedestal lower end is fixedly connected with pressure vessel or transport line.
Guide rod is fixedly connected on the outside of the convex for outlet of releasing, and the guide rod other end is fixedly connected with head cover；Explosion-proof sucker is
Bottom carries the truncated cone structure of convex, and through-hole is provided at convex, for across guide rod；Explosion-proof sucker is upside down in outlet of releasing
On, mutually agree with the trapezoidal convex for outlet of releasing at this time, agrees with place and contact-making switch is installed；
On guide rod, spring one end is fixedly connected spring pocket with head cover, and the other end is fixedly connected with explosion-proof sucker；
Electromagnet is separately mounted on head cover and explosion-proof sucker；Time switch is for controlling whether electromagnet is powered；Electromagnetism
The conduction time of iron can be adjusted with specific reference to engineering actual set by time switch, meet various working.
The flange interior side carries convex, the position for constraining woven wire and foamed ceramics；
The material of foamed ceramics is AL2O3Or SiC, specific aperture are selected according to actual requirement of engineering；The thickness of foamed ceramics
15mm is should be greater than, otherwise plays the role of acceleration to flame.
The course of work：Under normal condition, state of the explosion-proof sucker 12 in compacting under the action of 9 elastic force of spring, contact
Switch 6 is in the position of contact conducting, and electromagnet 11 is in power-off and does not have magnetic state.
When the pressure in pressure vessel either pipeline is more than that improper explosion occurs in the pressure threshold or pipeline set
When pyrophoricity accident causes the pressure moment of pipeline or container to increase.High pressure gas impacts explosion-proof sucker 12 so that on explosion-proof sucker
Touch switch 6 disconnect, actuating signal is passed to time switch 10, the connection electromagnet of space-time switch 10 by the touch switch of disconnection
Start timing while 11.Electromagnet 11 just obtains magnetic, the electromagnet suction of explosion-proof sucker and inside of top cover in the moment of energization
It being combined, opens leakage path, spring 9 is in compressive state, after the delay time timing of the time switch of setting,
Time switch 10 disconnects the energization of electromagnet 11, and electromagnet 11 loses magnetism, and explosion-proof sucker 12 is under the action of spring 9, again
Return closes leakage path.If the pressure in pipeline or pressure vessel remains above the pressure threshold of setting, pressure difference meeting at this time
Explosion-proof sucker 12 is reopened, contact-making switch 6 is disconnected, repeats the above-mentioned course of work.
The extinguishing flame being composed of woven wire 4 and foamed ceramics 5, reduce superpressure structure be in pressure vessel or
The centre position of person's pipeline and leakage path, flame or the explosion gas of high temperature and pressure by when, using woven wire and
The special construction and physical property of foamed ceramics carry out extinguishing to flame.
Advantageous effect
1, the extinguishing flame attenuation superpressure integral structure of extinguishing flame delay-self-closing pressure-relief explosion-proof door of the present invention can have
Effect reduces the size of the pressure of pressure-relief explosion-proof door exit shock wave so that and the flame size that exit propagates out obviously weakens,
Even extinguishing.
2, the delay-self-closing function in extinguishing flame delay-self-closing pressure-relief explosion-proof door of the present invention makes burning, explosion generate
Flame and shock wave can have decrease, extinguishing and the release of sufficient time；And it can be adjusted according to the needs outlet of releasing to open
The mouth time, different grades of explosion accident is coped with, it is applied widely.
3, the extinguishing flame attenuation superpressure integral structure in extinguishing flame delay-self-closing pressure-relief explosion-proof door of the present invention can also
Enough it effectively prevent the generation of tempering phenomenon；And due to the structure using integrated design, install during use, dismounting and more
It changes very convenient.
Description of the drawings
Fig. 1 is the schematic diagram of extinguishing flame delay-self-closing pressure-relief explosion-proof door of the present invention.
Wherein, 1- pedestals, 2- bolts, 3- flanges, 4- woven wires, 5- foamed ceramicses, 6- contact-making switches, 7- guide rods, 8-
Head cover, 9- springs, 10- time switch, 11- electromagnet, the explosion-proof suckers of 12-.
Specific embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The present invention discloses a kind of extinguishing flame delay-self-closing pressure-relief explosion-proof door, including：Pedestal 1, bolt 2, flange 3, metal
Silk screen 4, foamed ceramics 5, contact-making switch 6, guide rod 7, head cover 8, spring 9, time switch 10, electromagnet 11, explosion-proof sucker 12.
Woven wire 4 is laid on the both ends for the foamed ceramics 5 that thickness is 30mm, and foamed ceramics uses AL2O3Material；Pass through
Two flanges 3 are clamped, and have the fixation of bolt 2, form extinguishing flame attenuation superpressure integral structure, easy to disassemble during use
And replacement；4 one side of woven wire play the role of segmentation, extinguishing flame purpose, on the one hand play fixed foam ceramics 5,
Prevent the foamed ceramics that may be crushed in impact process 5 from splashing.
The side of extinguishing flame attenuation superpressure integral structure is fixed with outlet of releasing by bolt 2；The other side passes through spiral shell
Bolt 2 is fixedly connected with pedestal 1；Outlet release with the cyclic structure that sectional area is trapezoidal convex, to be used to support explosion-proof sucker
12；Pedestal 1 is cyclic structure, and 1 lower end of pedestal is fixedly connected with pressure vessel or transport line.
Guide rod 7 is fixedly connected on the outside of the convex for outlet of releasing, and 7 other end of guide rod is fixedly connected with head cover 8；Explosion-proof sucker
12 carry the truncated cone structure of convex for bottom, through-hole are provided at convex, for across guide rod 7；Explosion-proof sucker 12, which is upside down in, to be let out
On discharge port, mutually agree with the trapezoidal convex for outlet of releasing at this time, agrees with place and contact-making switch 6 is installed；
Spring 9 is sleeved on guide rod 7, and 9 one end of spring is fixedly connected with head cover 8, and the other end is fixedly connected with explosion-proof sucker 12；
Electromagnet 11 is separately mounted on head cover 8 and explosion-proof sucker 12；Whether time switch 10 is for controlling electromagnet 11
It is powered；The countdown of 0.5S is arranged in time switch；
3 interior side of the flange carries convex, the position for constraining woven wire 4 and foamed ceramics 5；
The course of work：
Under normal condition, state of the explosion-proof sucker 12 in compacting under the action of 9 elastic force of spring, contact-making switch 6 is in
The position of conducting is contacted, electromagnet 11 is in power-off and does not have magnetic state.
The pressure vessel that it is 9.5% in methane concentration that extinguishing flame delay-self-closing pressure-relief explosion-proof door of the present invention, which is arranged, is released
It is improper quick-fried when occurring in the pressure threshold or pressure vessel that the pressure in pressure vessel either pipeline is more than setting at mouthful
When fried pyrophoricity accident causes the pressure moment of pipeline or container to increase.High pressure gas impacts explosion-proof sucker 12 so that explosion-proof sucker
On touch switch 6 disconnect, actuating signal is passed to time switch 10, the connection electromagnetism of space-time switch 10 by the touch switch of disconnection
Start timing while iron 11.Electromagnet 11 just obtains magnetic, the electromagnet of explosion-proof sucker and inside of top cover in the moment of energization
It is pulled together, opens leakage path, spring 9 is in compressive state, in the delay time 0.5S timing of the time switch of setting
After, time switch 10 disconnects the energization of electromagnet 11, and electromagnet 11 loses magnetism, effect of the explosion-proof sucker 12 in spring 9
Under, return, closes leakage path again.If the pressure in pipeline or pressure vessel remains above the pressure threshold of setting at this time
Value, pressure difference can reopen explosion-proof sucker 12, disconnect contact-making switch 6, repeat the above-mentioned course of work.
The extinguishing flame being composed of woven wire 4 and foamed ceramics 5, reduce superpressure structure be in pressure vessel or
The centre position of person's pipeline and leakage path, flame or the explosion gas of high temperature and pressure by when, using woven wire and
The special construction and physical property of foamed ceramics carry out extinguishing to flame.Comparison does not use letting out for foamed ceramics and woven wire
Device is put, positive pressure of shock wave reduces 40% or so.
Claims (4)
1. a kind of extinguishing flame delay-self-closing pressure-relief explosion-proof door, it is characterised in that：Including：Pedestal (1), bolt (2), flange (3),
Woven wire (4), foamed ceramics (5), contact-making switch (6), guide rod (7), head cover (8), spring (9), time switch (10), electromagnetism
Iron (11), explosion-proof sucker (12)；
Woven wire (4) is laid on the both ends of foamed ceramics (5)；It is clamped by two flanges (3), and there is bolt (2) to fix, group
At extinguishing flame attenuation superpressure integral structure, easy to disassemble during use and replacement；Woven wire (4) on the one hand plays point
It cuts, the purpose of extinguishing flame, on the one hand plays the role of fixed foam ceramics (5), prevent the bubble that may be crushed in impact process
Foam ceramics (5) splash；
The side of extinguishing flame attenuation superpressure integral structure and outlet of releasing are fixed by bolt (2)；The other side passes through bolt
(2) it is fixedly connected with pedestal (1)；Outlet release with the cyclic structure that sectional area is trapezoidal convex, to be used to support explosion-proof suction
Disk (12)；Pedestal (1) is cyclic structure, and pedestal (1) lower end is fixedly connected with pressure vessel or transport line；
Guide rod (7) is fixedly connected on the outside of the convex for outlet of releasing, and guide rod (7) other end is fixedly connected with head cover (8)；Explosion-proof suction
Disk (12) is the truncated cone structure that bottom carries convex, and through-hole is provided at convex, for across guide rod (7)；Explosion-proof sucker (12)
It is upside down in and releases in outlet, mutually agree with the trapezoidal convex for outlet of releasing at this time, agree with place and contact-making switch (6) is installed；
Spring (9) is sleeved on guide rod (7), and spring (9) one end is fixedly connected with head cover (8), and the other end is solid with explosion-proof sucker (12)
Fixed connection；
Electromagnet (11) is separately mounted on head cover (8) and explosion-proof sucker (12)；Time switch (10) is for controlling electromagnet
(11) whether it is powered；
Flange (3) interior side carries convex, the position for constraining woven wire (4) and foamed ceramics (5).
2. a kind of extinguishing flame delay-self-closing pressure-relief explosion-proof door as described in claim 1, it is characterised in that：The foamed ceramics
Material be AL2O3Or SiC.
3. a kind of extinguishing flame delay-self-closing pressure-relief explosion-proof door as claimed in claim 1 or 2, it is characterised in that：Foamed ceramics
Thickness should be greater than 15mm.
4. a kind of extinguishing flame delay-self-closing pressure-relief explosion-proof door as described in claim 1, it is characterised in that：The course of work is：
Under normal condition, state of the explosion-proof sucker (12) in compacting under the action of spring (9) elastic force, contact-making switch (6) is in and connects
The position of conducting is touched, electromagnet (11) is in power-off and does not have magnetic state；
When the pressure in pressure vessel either pipeline is more than that improper explosive combustion occurs in the pressure threshold or pipeline set
When accident causes the pressure moment of pipeline or container to increase；High pressure gas impacts explosion-proof sucker (12) so that on explosion-proof sucker
Touch switch (6) disconnects, and actuating signal is passed to time switch (10) by the touch switch of disconnection, and space-time switchs (10) and connects electricity
Start timing while magnet (11)；Electromagnet (11) in the moment of energization, just obtain it is magnetic, explosion-proof sucker and inside of top cover
Electromagnetic actuation together, opens leakage path, spring (9) is in compressive state, in the delay time of the time switch of setting
After timing, time switch (10) disconnects the energization of electromagnet (11), and electromagnet (11) loses magnetism, and explosion-proof sucker (12) exists
Under the action of spring (9), return, closes leakage path again；If the pressure in pipeline or pressure vessel remains above at this time
The pressure threshold of setting, pressure difference can reopen explosion-proof sucker (12), disconnect contact-making switch (6), repeat the above-mentioned course of work；
The extinguishing flame being composed of woven wire (4) and foamed ceramics (5), reduce superpressure structure be in pressure vessel or
The centre position of person's pipeline and leakage path, flame or the explosion gas of high temperature and pressure by when, using woven wire and
The special construction and physical property of foamed ceramics carry out extinguishing to flame.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611102632 | 2016-12-05 | ||
| CN2016111026324 | 2016-12-05 |
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| Publication Number | Publication Date |
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| CN106763946A CN106763946A (en) | 2017-05-31 |
| CN106763946B true CN106763946B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611245707.4A Active CN106763946B (en) | 2016-12-05 | 2016-12-29 | Extinguishing flame delay-self-closing pressure-relief explosion-proof door |
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| CN (1) | CN106763946B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167805A (en) * | 2017-12-05 | 2018-06-15 | 重庆北金人防工程设备有限公司 | Industrial Boiler explosion-protection equipment |
| CN109940888A (en) * | 2017-12-21 | 2019-06-28 | 广州造维科技有限公司 | A kind of convenient 3D printer spray head used |
| CN110030425A (en) * | 2019-05-17 | 2019-07-19 | 常熟市海舟电气有限公司 | Rapid opening pressure relief valve |
| CN114594137B (en) * | 2022-03-07 | 2023-05-16 | 江苏海洋大学 | Inflammable liquid vapor-dust mixed explosion experimental device and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3881505A (en) * | 1974-03-04 | 1975-05-06 | Vapor Corp | Pressure responsive pilot valve |
| GB9223646D0 (en) * | 1992-11-11 | 1992-12-23 | Jenkins Trevor T | Flashback arrestor |
| CN1088671A (en) * | 1992-12-20 | 1994-06-29 | 宁伟 | The method of magnetic seal explosion proof door and magnetic seal inter-locking system and device |
| CN202613044U (en) * | 2012-05-23 | 2012-12-19 | 薛道成 | Automatic opening and closing type safe pressure relief explosion-proof device |
| CN102926631A (en) * | 2012-10-25 | 2013-02-13 | 无锡市华通电力设备有限公司 | Magnetic pretightening type automatically opened and closed explosion door |
| CN203322408U (en) * | 2013-04-26 | 2013-12-04 | 苏州协昌环保科技股份有限公司 | Depressurization explosion-proof valve |
| CN104324797B (en) * | 2014-10-22 | 2016-06-08 | 中国神华能源股份有限公司 | The air channel explosion venting device of coal pulverizer |
| CN104676246A (en) * | 2015-02-05 | 2015-06-03 | 北京理工大学 | Superconducting automatic opening and closing type pressure releasing explosion-proof door |
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2016
- 2016-12-29 CN CN201611245707.4A patent/CN106763946B/en active Active
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| CN106763946A (en) | 2017-05-31 |
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