CN108999540B - A kind of novel antiknock protective door door leaf structure and its manufacturing method - Google Patents
A kind of novel antiknock protective door door leaf structure and its manufacturing method Download PDFInfo
- Publication number
- CN108999540B CN108999540B CN201810828149.7A CN201810828149A CN108999540B CN 108999540 B CN108999540 B CN 108999540B CN 201810828149 A CN201810828149 A CN 201810828149A CN 108999540 B CN108999540 B CN 108999540B
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- Prior art keywords
- steel plate
- covering
- rod iron
- door leaf
- welded
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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
-
- 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
- E06B3/30—Coverings, e.g. protecting against weather, for decorative purposes
-
- 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
- E06B3/70—Door leaves
- E06B3/7007—Door leaves with curved, e.g. cylindrical or oval cross-section
-
- 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
- E06B3/70—Door leaves
- E06B3/7015—Door leaves characterised by the filling between two external panels
-
- 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
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
-
- 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
- E06B3/70—Door leaves
- E06B3/7015—Door leaves characterised by the filling between two external panels
- E06B2003/7028—Door leaves characterised by the filling between two external panels of cementituous type, e.g. concrete
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Securing Of Glass Panes Or The Like (AREA)
Abstract
The invention discloses a kind of novel antiknock protective door door leaf structures, including steel plate framework outside covering, it further include U-shaped ribbed stiffener and rod iron, the U-shaped ribbed stiffener is welded in the inside on the outer steel plate framework upper layer of covering, it is mutually welded with the upper and lower of steel plate framework outside covering respectively at the rod iron both ends, the rod iron is equipped with steel sleeve, steel pipe socket non-fully covers whole rod iron, by the way that U-shaped ribbed stiffener and rod iron are added in steel plate framework outside covering, increase the rigidity of protective door door leaf, the deformation energy dissipation capacity of steel plate and rod iron, under the premise of not changing door leaf basic structure, it can be realized quick normal mounting, achieve the purpose that block explosion wave, the various damages of bring due to blast wave have been effectively relieved, improve the safety index of life, there are wide application value and development prospect.
Description
Technical field
The present invention relates to a kind of novel antiknock protective door door leaf structure and its manufacturing methods.
Background technique
Currently, the type of antiknock protective door specifically includes that beam and slab type, ladle concrete filled steel tube, ladle concrete, box-shaped steel
Plate-reinforced concrete composite structure etc., but these types of blast-resistant door weight is big, energy dissipation capacity is poor, is unable to satisfy at all quickly
The requirement of installation and the energy consumption of blast wave wave absorption, thus, designing a kind of can satisfy Fast Installation and the elimination of maximum effect is quick-fried
The protective door of fried wave, just becomes particularly important, this will have breakthrough change to the technical field of preventing and reducing natural disasters of entire civil engineering
Into and significance.
Summary of the invention
The present invention exactly aiming at the problem that being unable to satisfy Fast Installation in the prior art and blast wave wave absorption consumes energy, provides
A kind of novel antiknock protective door door leaf structure and its manufacturing method, by adding U-shaped ribbed stiffener in steel plate framework outside covering
And rod iron, increase the rigidity of protective door door leaf, the deformation energy dissipation capacity of steel plate and rod iron, before not changing door leaf basic structure
It puts, can be realized quick normal mounting, achieve the purpose that block explosion wave, bring due to blast wave has been effectively relieved
Various damages improve the safety index of life, there is wide application value and development prospect.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of novel antiknock protective door door leaf structure, packet
The outer steel plate framework of covering is included, further includes U-shaped ribbed stiffener and rod iron, the U-shaped ribbed stiffener is welded in the outer steel plate framework upper layer of covering
Inside, the rod iron both ends mutually weld with the upper and lower of steel plate framework outside covering respectively, and the rod iron is equipped with steel bushing
Pipe, steel pipe socket non-fully cover whole rod iron.
As an improvement of the present invention, the rod iron passes through the hinge the upper and lower with steel plate framework outside covering respectively
It mutually welds, the upper layer hinge is separately distributed one by one with U-shaped ribbed stiffener.
As an improvement of the present invention, the outer steel plate framework upper layer section of the covering uses conic section type, U-shaped to put more energy into
Rib equidistantly distributes on the inside of steel plate framework upper layer outside covering, and the centre distance of the adjacent U-shaped ribbed stiffener is U-shaped top width
2-3 times.
It as an improvement of the present invention, further include foamed aluminium, the foamed aluminium is filled in the outer steel plate framework of covering and is formed
Cavity in.
It further include foam concrete as another improvement of the invention, the foam concrete is filled in the outer steel of covering
In the cavity that plate framework is formed, separated by interior partition steel plate with foamed aluminium.
It is improved as another kind of the invention, the interior partition steel plate thickness is 2-4mm, interior partition steel plate and foam coagulation
Native adherent side arrangement weldering nail.
It is improved as another kind of the invention, the foam concrete includes water, portland cement, foaming agent, lime, stone
Cream, sand, flyash and additive, density 400-500kg/m3。
As a further improvement of the present invention, on the left of the outer steel plate framework of the covering in embedded structure wall, the illiteracy
For section using the circle of indent 1/4, radius is structure wall thickness on the left of the outer steel plate framework of skin.
To achieve the goals above, the present invention also the technical solution adopted is that: a kind of novel antiknock protective door door leaf structure
Manufacturing method, comprising the following steps:
1) size of protective door door leaf is determined according to practical structures size, carries out cutting for the outer steel plate framework four sides of covering respectively
It cuts and cold roll forming；
2) U-shaped ribbed stiffener is welded on to the inside on frame upper layer；
Rod iron is mutually welded with the upper and lower of steel plate framework outside covering respectively by hinge；
The upper layer hinge is separately distributed one by one with U-shaped ribbed stiffener；
3) steel sleeve is placed on rod iron by bolt, steel sleeve non-fully covers rod iron；
4) by welding weldering nail on interior partition steel plate；
5) the upper and lower for having welded the interior partition steel plate and steel plate framework outside covering of nail are mutually welded；
6) steel plate upper and lower level closing outside steel plate or so layer outside covering and covering is welded；
7) mixing foam concrete, and foam concrete is filled in interior partition steel plate and is formed with steel plate outside covering or so layer
Two sides cavity in；
8) the filled and process aluminium in steel plate upper and lower level middle cavity outside covering.
Compared with prior art, the present invention caused by the utility model has the advantages that
(1) U-shaped ribbed stiffener can enhance the rigidity of the outer steel plate of covering, and support force is stronger, and door leaf safety is higher.
(2) energy dissipation capacity of steel plate and rod iron, can effectively absorb the energy of explosion wave, and be prevented using steel sleeve
Rod iron energy consumption buckling substantially reduces explosion wave direction inside configuration and propagates, reduces the damage of safeguard structure internal structure personnel, reach
The purpose of support personnel's material safety.
(3) foamed aluminium itself has brilliant absorbability to blast impulse wave energy, can largely reduce peak value
Stress also shows the good ability for absorbing energy in the case where the reflection superposition of explosion wave.
(4) foam concrete can be generated bigger deformation energy consumption, be cooperated foamed aluminium due to the presence of internal abundant hole
It is used as interlayer or surface layer, further reaches energy-absorbing function for antiknock protective layer, greatly improve work efficiency, rationally reduced
The various damages generated by blast wave.
(5) partition steel plate and foam concrete adherent side arrangement weldering nail in, the purpose of arrangement weldering nail is to stretch in order to prevent
Wave effect lower steel plate comes to nothing with foam concrete, prevents the outer steel plate upper layer 6 of covering excessive deformation under tensile wave effect.
(6) protective door door leaf structure of the invention is simple, can complete the production in factory, and the scene of being transported to is installed, and is had
Save the cost, quality controllable and easy for construction advantage.
(7) production method of protective door door leaf of the present invention does not break the Basic architecture of common door leaf, operation letter
It is single, it is easy to get started, convenient for batch production and implement, there is extensive operation prospect and use value.
Detailed description of the invention
Fig. 1 is a kind of cross-sectional view of novel antiknock protective door door leaf structure of the present invention；
Fig. 2 is a kind of three-dimensional figure of novel antiknock protective door door leaf structure of the present invention；
Fig. 3 is the connection schematic diagram of rod iron and steel sleeve in a kind of novel antiknock protective door door leaf structure of the present invention；
Fig. 4 is hinge schematic diagram in a kind of novel antiknock protective door door leaf structure of the present invention；
Have in figure: 1.U type ribbed stiffener, 2. rod irons, 3. steel sleeves, 4, foamed aluminium, 5. foam concrete, 6, the outer steel plate of covering
Upper layer, the outer left layer of steel plate of 7. coverings, the outer steel plate lower layer of 8. coverings, the right layer of the outer steel plate of 9. coverings, partition steel plates in 10., in 11.
Separate steel plate, 12. bolts.
Specific embodiment
Below with reference to drawings and examples, the present invention is described in detail.
Embodiment 1
A kind of novel antiknock protective door door leaf structure, as shown in Figure 1, including the outer steel plate framework 6 of covering, 7,8,9, further include
U-shaped ribbed stiffener 1 and rod iron 2, U-shaped ribbed stiffener 1 is welded in the inside on the outer steel plate framework upper layer 6 of covering, outside covering on steel plate framework
6 section of layer use conic section type, and U-shaped ribbed stiffener 1 inside on steel plate framework upper layer 6 outside covering equidistantly distributes, U-shaped to add
Strength, 1 can enhance the rigidity of the outer steel plate framework 6,7,8,9 of covering, and support force is stronger, and door leaf safety is higher, adjacent U-shaped ribbed stiffener
1 centre distance is 2-3 times of U-shaped top width.
2 both ends of rod iron are welded with the upper layer 6 of steel plate framework outside covering and 8 phase of lower layer respectively, and rod iron 2 can effectively absorb quick-fried
The energy of fried shock wave, rod iron 2 are equipped with steel sleeve 3, and the steel pipe socket 3 non-fully covers whole rod iron 2, when rod iron 2 by
When shock wave, the energy consumption buckling of rod iron 2 is can be effectively prevented in steel sleeve 3, is substantially reduced impact wave direction inside configuration and is propagated, improves steel
The energy efficiency of stick 2.The rod iron 2 is welded with the upper layer 6 of steel plate framework outside covering and 8 phase of lower layer respectively by hinge, upper layer
Hinge is separately distributed one by one with U-shaped ribbed stiffener 1, and being used cooperatively for U-shaped ribbed stiffener 1 and rod iron 2 and steel sleeve 3 further mentions
The wave absorption of high blast wave consumes energy, and safety is higher.
Embodiment 2
The present embodiment difference from example 1 is that: further include foamed aluminium 4 and foam concrete 5, foamed aluminium 4 is filled out
It fills in steel plate framework 6 outside covering, 7,8,9 cavitys formed, foamed aluminium 4 itself has brilliant suction to blast impulse wave energy
Receipts ability can largely reduce peak stress, also show in the case where the reflection of explosion wave superposition good
The ability of energy is absorbed, foam concrete 5 is filled in the cavity that the outer steel plate framework 6,7,8,9 of covering is formed, and passes through interior partition
Steel plate 10 is separated with foamed aluminium 4, and the interior partition steel plate 10 bonds with a thickness of 2-4mm, interior partition steel plate 10 with foam concrete 5
Side arrangement weldering nail, the purpose of arrangement weldering nail are that tensile wave effect lower steel plate comes to nothing with foam concrete in order to prevent, prevent covering
Outer steel plate upper layer 6 excessive deformation under tensile wave effect, the foam concrete 5 include water, portland cement, foaming agent, stone
Ash, gypsum, sand, flyash and additive, density 400-500kg/m3, the density of foam concrete is 400-500kg/m3
When its energy consumption effect it is obvious, be greater than this range energy consumption and act on unobvious, increase few, foam coagulation lower than the energy consumption of this range
Soil 5 can generate bigger deformation energy consumption due to the presence of internal abundant hole, and cooperation foamed aluminium 4 makes as interlayer or surface layer
With, further reach energy-absorbing function for antiknock protective layer, greatly improves work efficiency, what reasonable reduction was generated by blast wave
Various damages.
Embodiment 3
The present embodiment and the difference of embodiment 1,2 are: the outer steel plate framework 6,7,8,9 of the covering with a thickness of 10-
20mm, as shown in Figure 1,7 sections use on the left of the outer steel plate framework of covering on the left of the outer steel plate framework of covering in 7 embedded structure walls
The circle of indent 1/4, radius are structure wall thickness, and the outer steel plate framework of the covering of such size the most securely and is stablized；U-shaped ribbed stiffener
Top width and bottom width can according to door leaf size determine, it is most appropriate when U-shaped ribbed stiffener 1 is with a thickness of 6mm-10mm；Due to steel
The covering of casing 3 is on rod iron 2, thus 2 diameter of rod iron to consume energy is less than the steel sleeve 3, but the two actual size can be according to holding
Carry and 2 Buckling of rod iron and determine, the steel sleeve 3 can be connect by bolt setting up and down with rod iron 2.Below with a reality
For the data case of border:
One built structure wall, doorframe height and width are 5m × 5m, and thickness of wall body 0.5m needs to do antiknock protection
Door determines that the basic size of the outer steel plate lower layer 8 of covering is 5m × 5m according to doorframe and wall size, door hinge side steel plate, i.e.,
7 take interior curved radius for 0.5m on the left of the outer steel plate of covering, the clod wash steel plate of length 5m, and the outer steel plate of door lock side steel plate, i.e. covering is right
9 basic size of side is 5m × 0.5m, and the outer steel plate upper layer 6 of covering is greater than 1/10 parabolic type steel plate using ratio of rise to span, and length is
5m.Interior 11 length of partition steel plate is 5m, is highly calculated according to the line style on steel plate upper layer 6 outside covering, and interior 10 length of partition steel plate is
5m, 9 distance, one times of thickness of wall body on the right side of steel plate, highly calculates according to the line style on steel plate upper layer 6 outside covering, covering outside covering
Outer steel plate framework four sides integral thickness is all made of 20mm.
6 back side of steel plate upper layer outside covering, equidistant to weld 5-8 U-shaped ribbed stiffeners 1, U-shaped 1 top width of ribbed stiffener is 0.3m-
0.5m, bottom width 0.2m-0.4m, U rib thickness use 8mm, and adjacent ribbed stiffener distance between center lines are twice of top width.
By the molding of energy consumption rod iron 2 and both ends aperture as shown in figure 3,2 size of rod iron is determined according to actual energy consumption demand, and
2 outside interlude of rod iron covers steel sleeve 3, and 3 diameter of steel sleeve is greater than rod iron 2, and diameter specific size is according to rod iron Buckling
It determines.And screw thread is scribed in the rod iron position at casing both ends, steel sleeve 3 is set on rod iron 2 by bolt 12, and non-fully covers
Lid rod iron 2.
Hinge is welded between two ribbed stiffeners in 6 back side of steel plate upper layer outside covering, and hinge is as shown in figure 4, hinge is horseshoe
Shape, and aperture is carried out, aperture size is consistent with the aperture of rod iron both ends, and the outer steel plate lower layer of covering equally arranges hinge in 8 corresponding position,
Guarantee that corresponding hinge line is vertical with outer 8 plane of steel plate lower layer of covering, by energy consumption rod iron 2 and sleeve combination body by aperture to it
And it plugs pin and is connected on hinge.
Separate steel plate 10,11 sides welding weldering nail inside, weldering nail dimension is made according to tensile wave under practical Blast Loads
Firmly determine, the outer steel plate upper layer 6 of covering, outer partition steel plate 10,11 and the outer steel plate lower layer 8 of covering, pays attention to outside partition steel plate 10,
11 have weldering nail side outwardly, then weld the outer steel plate layer side 7 of covering and the right layer 9 of the outer steel plate of covering.
Outside covering steel plate upper layer 6, in the cavity that the left layer 7 of steel plate and partition steel plate 11 form outside covering, the steel outside covering
The empty intra-bladder instillation foam concrete that plate upper layer 6, the outer steel plate lower layer 8 of covering, the outer right layer 9 of steel plate of covering and partition steel plate 10 form
5, the density of foam concrete 5 uses 400kg/m3。
Steel plate upper layer 6, filled and process in the cavity that steel plate lower layer 8 and partition steel plate 10,11 form outside covering outside covering
Aluminium 4.
Prefabricated door leaf structure is installed by conventional hinge to doorframe, and lockset is installed, until completing, Fig. 2 is
A kind of three-dimensional figure of novel antiknock protective door door leaf of the present embodiment.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel only illustrate the present invention it should be appreciated that the present invention is not limited by examples detailed above described in examples detailed above and specification
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its is equal
Object defines.
Claims (1)
1. a kind of manufacturing method of novel antiknock protective door door leaf structure, which comprises the following steps:
1) size of protective door door leaf is determined according to practical structures size, carry out respectively the outer steel plate framework four sides of covering cutting and
Cold roll forming；
2) U-shaped ribbed stiffener is welded on to the inside on frame upper layer；
Rod iron is mutually welded with the upper and lower of steel plate framework outside covering respectively by hinge；
The upper layer hinge is separately distributed one by one with U-shaped ribbed stiffener；
3) steel sleeve is placed on rod iron by bolt, steel sleeve non-fully covers rod iron；
4) by welding weldering nail on interior partition steel plate；
5) the upper and lower for having welded the interior partition steel plate and steel plate framework outside covering of nail are mutually welded；
6) steel plate upper and lower level closing outside steel plate or so layer outside covering and covering is welded；
7) mixing foam concrete, and foam concrete is filled in steel plate or so layer is formed outside interior partition steel plate and covering two
In the cavity of side；
8) the filled and process aluminium in steel plate upper and lower level middle cavity outside covering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828149.7A CN108999540B (en) | 2018-07-25 | 2018-07-25 | A kind of novel antiknock protective door door leaf structure and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828149.7A CN108999540B (en) | 2018-07-25 | 2018-07-25 | A kind of novel antiknock protective door door leaf structure and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108999540A CN108999540A (en) | 2018-12-14 |
| CN108999540B true CN108999540B (en) | 2019-10-22 |
Family
ID=64597199
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810828149.7A Active CN108999540B (en) | 2018-07-25 | 2018-07-25 | A kind of novel antiknock protective door door leaf structure and its manufacturing method |
Country Status (1)
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| CN (1) | CN108999540B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723491B (en) * | 2019-01-17 | 2024-01-16 | 中铁第四勘察设计院集团有限公司 | Tunnel protection door and forming method thereof |
| CN110500009A (en) * | 2019-07-25 | 2019-11-26 | 潜山县九鼎精密机械有限公司 | A kind of civil air defense constructions and installations shock resistance composite protective door |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182387A (en) * | 2011-04-12 | 2011-09-14 | 西安交通大学 | Protective door with composite steel structure |
| WO2015132758A1 (en) * | 2014-03-06 | 2015-09-11 | Fallaolita Luca | Door openable in case of structural failure |
| CN205135325U (en) * | 2015-07-16 | 2016-04-06 | 北京五加防盗门制造有限公司 | Steel explosion vent |
| CN105781364A (en) * | 2016-03-21 | 2016-07-20 | 哈尔滨工业大学 | Staggered splicing type steel plate-RPC anti-detonation door and construction method thereof |
| CN206438948U (en) * | 2017-01-13 | 2017-08-25 | 山西永兴盛和防火设备有限公司 | A kind of protection safety door |
-
2018
- 2018-07-25 CN CN201810828149.7A patent/CN108999540B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182387A (en) * | 2011-04-12 | 2011-09-14 | 西安交通大学 | Protective door with composite steel structure |
| WO2015132758A1 (en) * | 2014-03-06 | 2015-09-11 | Fallaolita Luca | Door openable in case of structural failure |
| CN205135325U (en) * | 2015-07-16 | 2016-04-06 | 北京五加防盗门制造有限公司 | Steel explosion vent |
| CN105781364A (en) * | 2016-03-21 | 2016-07-20 | 哈尔滨工业大学 | Staggered splicing type steel plate-RPC anti-detonation door and construction method thereof |
| CN206438948U (en) * | 2017-01-13 | 2017-08-25 | 山西永兴盛和防火设备有限公司 | A kind of protection safety door |
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| CN108999540A (en) | 2018-12-14 |
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