CN110714704A - Automatic change multilayer explosion vent - Google Patents
Automatic change multilayer explosion vent Download PDFInfo
- Publication number
- CN110714704A CN110714704A CN201911010196.1A CN201911010196A CN110714704A CN 110714704 A CN110714704 A CN 110714704A CN 201911010196 A CN201911010196 A CN 201911010196A CN 110714704 A CN110714704 A CN 110714704A
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- Prior art keywords
- explosion
- explosion vent
- layer
- protective layer
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004880 explosion Methods 0.000 title claims abstract description 54
- 239000011241 protective layer Substances 0.000 claims abstract description 43
- 239000010410 layer Substances 0.000 claims abstract description 31
- 238000013016 damping Methods 0.000 claims description 31
- 239000000725 suspension Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 230000035939 shock Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/12—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against air pressure, explosion, or gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
- B01D53/85—Biological processes with gas-solid contact
-
- 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
- E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
- E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
- E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
- E05F1/1041—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a coil spring perpendicular to the pivot axis
-
- 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
- E05F5/00—Braking devices, e.g. checks; Stops; Buffers
- E05F5/06—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
- E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
- E06B3/38—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement with a horizontal axis of rotation at the top or bottom of the opening
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/12—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against air pressure, explosion, or gas
- E06B5/14—Gasproof doors or similar closures; Adaptation of fixed constructions therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/93—Toxic compounds not provided for in groups B01D2257/00 - B01D2257/708
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Type of wing
- E05Y2900/132—Doors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Special Wing (AREA)
Abstract
The invention discloses an automatic multi-layer explosion-proof door which is characterized by comprising an explosion-proof door frame, a fixing component, an explosion-proof door rotating lifting lug, a connecting frame, a spring, a first protective layer, a second protective layer, a third protective layer and a fourth protective layer. The invention relates to an automatic multilayer explosion-proof door which can be automatically closed during explosion and is provided with four layers of explosion shock wave protection, so that the effect of further guaranteeing the safety of life and property is achieved.
Description
Technical Field
The invention relates to the field of explosion vents, in particular to an automatic multilayer explosion vent.
Background
The explosion door is an explosion-proof protection device for resisting accidental explosion of devices outside an industrial building, ensuring the life safety of personnel and the integrity of internal equipment of the industrial building, being not damaged by explosion shock waves and effectively preventing the continuation of explosion damage. The steel plate can be made of special industrial steel plates according to strictly set mechanical data and is matched with high-performance hardware fittings to guarantee life and property safety.
The existing explosion vent mainly considers the strength of the explosion vent, is not damaged under the damage of explosion shock waves, but does not consider much on the automatic closing and toxic gas protection of the explosion vent. Therefore, an explosion-proof door product which can be automatically closed and has better explosion-proof effect is needed.
Disclosure of Invention
The invention aims to overcome the defects and provides an automatic multilayer explosion-proof door.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an automatic change multilayer explosion vent, its characterized in that, rotates lug, link, spring, first inoxidizing coating, second inoxidizing coating, third inoxidizing coating, fourth inoxidizing coating including explosion-proof door frame, fixed component, explosion vent, explosion-proof door frame one end is provided with fixed component all around, explosion-proof door frame one end upper portion is connected with the explosion vent, explosion vent rotation lug is installed on explosion-proof door one end upper portion, explosion vent rotation lug one end upper portion is connected with the link, link one end bottom is provided with the spring, explosion-proof door frame one end rear portion is provided with first inoxidizing coating, first inoxidizing coating one end rear side is connected with the second inoxidizing coating, the third inoxidizing coating is installed at second inoxidizing coating one end rear portion, the fourth inoxidizing coating is installed at third inoxidizing coating.
As a further improved technical scheme of the invention, the upper part of one end of the connecting frame is connected with a rotary connecting shaft.
As a further improved technical scheme of the invention, the first protective layer is made of heat-resistant concrete.
As a further improved technical scheme of the invention, the second protective layer is a heat-preservation nail.
As a further improved technical solution of the present invention, the third protection layer damping unit includes a magnetic suspension damping module and a spring damping module.
As a further improved technical scheme of the invention, the magnetic suspension damping module comprises an upper magnetic sheet, a damping device and a lower magnetic sheet.
As a further improved technical scheme of the invention, the spring shock absorption module comprises a shock absorption spring and a strut.
As a further improved technical scheme of the invention, activated carbon is arranged inside the fourth protective layer.
Compared with the prior art, the invention has the beneficial effects that:
1. automatically closing the explosion door: the automatic multilayer explosion-proof door can automatically close the explosion-proof door when the explosion and other shock waves are damaged.
2. Many inoxidizing coating protection, the danger that the multi-angle reduction explosion brought: according to the automatic multilayer explosion-proof door, four layers of protection are arranged behind the door and are respectively a heat-resistant layer, a heat-preservation layer, a shock-absorbing layer and a gas-proof layer, so that the safety of life and property is guaranteed.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the description of the embodiment will be briefly introduced below, and it is obvious that the drawings in the following description are only for more clearly illustrating the embodiment of the present invention or the technical solution in the prior art, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a front view of an automated multi-layer vent of the present invention.
Fig. 2 is a side sectional view of an automated multi-layer vent of the present invention.
FIG. 3 is a schematic view of the shock absorbing and shock absorbing layer of an automated multi-layer explosion vent according to the present invention.
In the above fig. 1 to 3, 1 explosion-proof door frame, 2 fixing members, 3 explosion-proof doors, 4 explosion-proof door rotating lifting lugs, 5 connecting frames, 6 springs, 7 first protective layers, 8 second protective layers, 9 third protective layers, 10 fourth protective layers, 51 rotating connecting shafts, 91 magnetic suspension damping modules, 92 spring damping modules, 911 upper magnetic sheets, 912 damping devices, 913 lower magnetic sheets, 921 damping springs and 922 supporting columns.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 3, an automatic multi-layer explosion vent is characterized by comprising an explosion vent frame 1, a fixing member 2, an explosion vent 3, an explosion vent rotating lifting lug 4, a connecting frame 5, a spring 6, a first protective layer 7, a second protective layer 8, a third protective layer 9 and a fourth protective layer 10, the periphery of one end of the explosion-proof door frame 1 is provided with a fixed component 2, the upper part of one end of the explosion-proof door frame 1 is connected with an explosion-proof door 3, the upper part of one end of the explosion door 3 is provided with an explosion door rotating lifting lug 4, the upper part of one end of the explosion door rotating lifting lug 4 is connected with a connecting frame 5, a spring 6 is arranged at the bottom of one end of the connecting frame 5, a first protective layer 7 is arranged at the rear part of one end of the explosion-proof door frame 1, the rear side of one end of the first protective layer 7 is connected with a second protective layer 8, a third protective layer 9 is installed at the rear part of one end of the second protective layer 8, and a fourth protective layer 10 is installed at the rear part of one end of the third protective layer 9.
In the invention, the upper part of one end of the connecting frame 5 is connected with a rotary connecting shaft 51; the first protective layer 7 is made of heat-resistant concrete; the second protective layer 8 is a heat-insulating nail; the third protection layer 9 is a damping unit, and the third protection layer 9 comprises a magnetic suspension damping module 91 and a spring damping module 92; the magnetic suspension damping module 91 consists of an upper magnetic sheet 911, a damping device 912 and a lower magnetic sheet 913; the spring damping module 92 includes a damping spring 921 and a strut 922; the fourth protective layer 10 is provided with activated carbon inside.
The automatic multilayer explosion-proof door is convenient to operate and simple in principle, can be automatically closed through the connecting frame 5 and the spring 6, and meanwhile, reduces the danger caused by explosion by means of four protective layers.
When in normal use, a user can conveniently open and close the explosion vent 3 by rotating the lifting lug 4 through the explosion vent.
When explosion happens, the explosion shock wave extrudes the connecting frame 5 to drive the spring 6 to compress to push the explosion door 3 to be automatically closed.
The first protective layer 7, the second protective layer 8, the third protective layer 9 and the fourth protective layer 10 each play a different role when the protective action is activated.
The first protective layer 7 is a heat-resistant concrete layer, and heat-resistant concrete is coated on the inner side of the first protective layer, so that high-temperature damage equipment is protected; the second protective layer 8 is a heat-insulating nail which is fireproof and high-temperature-resistant.
The third protection layer 9 is a damping unit provided with a magnetic levitation damping module 91 and a spring damping module 92. The operation of the magnetic suspension damping module 91 is far away: the elastic body arranged inside the damping device 912 is made of elastic soft rubber, the damping device 912 is vertically through, and the damping device 912 is sleeved on the elastic body inside the damping device 912 through the through hole. This magnetic suspension shock attenuation module 91 mechanism is photon material, and inside last magnetic sheet 911 and lower magnetic sheet 913 form through the processing of photon equipment, and the magnetic suspension mechanism through the preparation of photon material has changed the subatomic structure of magnetic suspension magnet, makes its magnetic force direction can extend according to the structure of platform, and magnetic force is more evenly stable simultaneously. The invention magnetizes an upper magnetic sheet 911 and a lower magnetic sheet 913 by electrifying the coil inside and generating a magnetic field with opposite directions wound on the upper part and the lower part of an elastic body inside a damping device 912. According to the principle that like magnetic poles repel each other, current in opposite directions is applied to coils on the upper portion and the lower portion of the lower magnetic sheet 913, so that mutually repulsive electromagnetic force is generated between the upper magnetic sheet 911 and the lower magnetic sheet 913, and the upper magnetic sheet 911 is suspended upwards under the action of the repulsive electromagnetic force. Spring shock absorption module 92 principle magnetic suspension shock absorption module 91 lower part is provided with spring shock absorption module 92, further absorbs the vibrations that the blast wave brought through the damping spring 921 that its inside was provided to this vibrations harm that reduces the blast shock wave and bring.
The fourth protective layer 10 is loaded with active peptide to absorb and filter toxic gas.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. An automatic multi-layer explosion vent is characterized by comprising an explosion vent frame (1), a fixing component (2), an explosion vent (3), an explosion vent rotating lifting lug (4), a connecting frame (5), a spring (6), a first protective layer (7), a second protective layer (8), a third protective layer (9) and a fourth protective layer (10), wherein the fixing component (2) is arranged around one end of the explosion vent frame (1), the explosion vent (3) is connected to the upper part of one end of the explosion vent frame (1), the explosion vent rotating lifting lug (4) is installed on the upper part of one end of the explosion vent (3), the connecting frame (5) is connected to the upper part of one end of the explosion vent rotating lifting lug (4), the spring (6) is arranged at the bottom of one end of the connecting frame (5), the first protective layer (7) is arranged at the rear part of one end of the explosion vent frame (1), the second protective layer (8) is connected to the rear side of one end of, and a third protection layer (9) is installed at the rear part of one end of the second protection layer (8), and a fourth protection layer (10) is installed at the rear part of one end of the third protection layer (9).
2. An automated multi-layer explosion vent as defined in claim 1, wherein: the upper part of one end of the connecting frame (5) is connected with a rotary connecting shaft (51).
3. An automated multi-layer explosion vent as defined in claim 1, wherein: the first protective layer (7) is made of heat-resistant concrete.
4. An automated multi-layer explosion vent as defined in claim 1, wherein: the second protective layer (8) is a heat-insulating nail.
5. An automated multi-layer explosion vent as defined in claim 1, wherein: and the third protection layer (9) is a damping unit, and the third protection layer (9) comprises a magnetic suspension damping module (91) and a spring damping module (92).
6. An automated multi-layer explosion vent as defined in claim 5, wherein: the magnetic suspension damping module (91) is composed of an upper magnetic sheet (911), a damping device (912) and a lower magnetic sheet (913).
7. An automated multi-layer explosion vent as defined in claim 5, wherein: the spring dampening module (92) includes a dampening spring (921) and a strut (922).
8. An automated multi-layer explosion vent as defined in claim 1, wherein: and activated carbon is arranged in the fourth protective layer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911010196.1A CN110714704A (en) | 2019-10-23 | 2019-10-23 | Automatic change multilayer explosion vent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911010196.1A CN110714704A (en) | 2019-10-23 | 2019-10-23 | Automatic change multilayer explosion vent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110714704A true CN110714704A (en) | 2020-01-21 |
Family
ID=69214104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911010196.1A Pending CN110714704A (en) | 2019-10-23 | 2019-10-23 | Automatic change multilayer explosion vent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110714704A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2172402Y (en) * | 1993-07-24 | 1994-07-20 | 朱宗林 | Limit device for explosion-proof door of air return boiler |
| EP2138669A1 (en) * | 2008-06-02 | 2009-12-30 | Bernhard Feigl | Crash protection |
| CN103670215A (en) * | 2013-11-18 | 2014-03-26 | 方益达 | Multifunctional explosion-proof air-tight door |
| CN208359887U (en) * | 2018-03-19 | 2019-01-11 | 南昌金轩科技有限公司 | A kind of anti-collision automobile door |
| CN209384978U (en) * | 2018-09-14 | 2019-09-13 | 天津市耀晖人防设备有限公司 | A kind of Novel glue tubular type explosion wave prevention active door |
-
2019
- 2019-10-23 CN CN201911010196.1A patent/CN110714704A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2172402Y (en) * | 1993-07-24 | 1994-07-20 | 朱宗林 | Limit device for explosion-proof door of air return boiler |
| EP2138669A1 (en) * | 2008-06-02 | 2009-12-30 | Bernhard Feigl | Crash protection |
| CN103670215A (en) * | 2013-11-18 | 2014-03-26 | 方益达 | Multifunctional explosion-proof air-tight door |
| CN208359887U (en) * | 2018-03-19 | 2019-01-11 | 南昌金轩科技有限公司 | A kind of anti-collision automobile door |
| CN209384978U (en) * | 2018-09-14 | 2019-09-13 | 天津市耀晖人防设备有限公司 | A kind of Novel glue tubular type explosion wave prevention active door |
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Application publication date: 20200121 |