CN208534358U - A fireproof and soundproof door - Google Patents
A fireproof and soundproof door Download PDFInfo
- Publication number
- CN208534358U CN208534358U CN201821157571.6U CN201821157571U CN208534358U CN 208534358 U CN208534358 U CN 208534358U CN 201821157571 U CN201821157571 U CN 201821157571U CN 208534358 U CN208534358 U CN 208534358U
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- China
- Prior art keywords
- fire
- door leaf
- door
- sound insulation
- clamshell doors
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- 238000009413 insulation Methods 0.000 claims abstract description 40
- 230000002265 prevention Effects 0.000 claims abstract description 37
- 239000007921 spray Substances 0.000 claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 239000011490 mineral wool Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920000742 Cotton Polymers 0.000 claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 11
- 239000004831 Hot glue Substances 0.000 claims abstract description 9
- 239000012945 sealing adhesive Substances 0.000 claims description 18
- 229910001562 pearlite Inorganic materials 0.000 claims description 14
- 239000011435 rock Substances 0.000 claims description 13
- 230000009970 fire resistant effect Effects 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000008397 galvanized steel Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000003823 mortar mixing Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 235000019362 perlite Nutrition 0.000 abstract 1
- 239000010451 perlite Substances 0.000 abstract 1
- 229920003266 Leaf® Polymers 0.000 description 43
- 239000000463 material Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Special Wing (AREA)
Abstract
The utility model discloses a fireproof and soundproof split door, the door frame of which is filled with fireproof filler, so that the door frame has good structural strength, and the problem that the door frame deforms due to heating can be effectively solved, and the door leaf adopts the arrangement mode of a steel plate and an expanded perlite plate and a rock wool plate, so that the door has stable structure and good fireproof performance, wherein soundproof cotton is arranged between the rock wool plates, so that the fireproof and soundproof split door has good soundproof effect, and can meet soundproof requirements of various occasions; moreover, the shower of setting on the door frame is when being heated, and the hot melt adhesive of closing cap on the mouth that sprays is heated and fuses, and water in the shower will follow the mouth that sprays blowout, not only can give sound insulation to this fire prevention cool down to the side by side the door, improves its resistance to burning, prevents that the door from being burnt and causing the emergence of the condition that personnel can't in time flee, and in addition, the shower directly sprays the burning things which may cause a fire disaster, can effectively prevent that the intensity of a fire from stretching after the door to the person behind the protection door, property safety.
Description
Technical field
This application involves ORIENTED DOOR AND WINDOW DESIGN technical field more particularly to a kind of fire-proof sound insulation clamshell doors.
Background technique
With the continuous improvement of people's fire-fighting consciousness, fire equipment becomes a part indispensable in building,
Measure one of of the middle fire resistant doorsets as building fire separation is frequently applied in the staircase entrance or piping shaft of building
The positions such as opening；However, for fire resistant doorsets on the market due to unreasonable structure, fire-proof function is poor at present, when fire is greater, and
Cigarette, fire cannot be effectively obstructed, there is some potential safety problems.
Moreover, for some particular applications for having sound insulation demand, for example, some top grade offices, meeting room, bedroom
Equal places, fire resistant doorsets on the market are unable to satisfy the sound insulation demand in these places due to its sound insulation function and not perfect.
In conclusion finding, one kind having the function of sound insulation and the superior fire resistant doorsets of fire protecting performance become those skilled in the art
The important topic studied.
Utility model content
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of fire-proof sound insulation pair
It opens the door, to solve the technical problems such as existing fire resistant doorsets sound insulation value is not perfect, fire protecting performance is poor.
To achieve the above objectives, the present invention provides the following technical solutions:
A kind of fire-proof sound insulation clamshell doors, including doorframe and the symmetrically arranged first door leaf unidirectionally opened and closed and second
Fan；
The doorframe includes hollow frame body, and the fire prevention filler being filled in the frame body；It is described
Frame body offers connector mounting groove, and concealed type is equipped with hinge in the connector mounting groove, the first door leaf and
Second door leaf is articulated in the doorframe by the hinge；
The first door leaf and the second door leaf structure having the same, including the first steel plate and the second steel plate, described first
Steel plate and the second steel plate are interconnected to form seal chamber；
It is symmetrical arranged in the seal chamber there are two expanded pearlite rock beam, is additionally provided between two expanded pearlite rock beams
Two rock wool boards are filled with acoustical cotton between two rock wool boards；
It is close that the junction of the frame body and the first door leaf and the second door leaf is surrounded with the first fire prevention expansion
The outer wall surrounding of seal strip, the first door leaf and the second door leaf be all provided with there are two second fire prevention Expansion sealing adhesive tape；
Horizontal positioned spray tube is also equipped at the top of the doorframe, the bottom of the spray tube offers multiple water sprays
Mouthful, the water jet capping has hot melt adhesive；The spray tube connects water system by switch valve.
Optionally, be additionally provided at the crack between a door and its frame between the first door leaf and the second door leaf third fire prevention Expansion sealing adhesive tape and
4th fire prevention Expansion sealing adhesive tape, the third fire prevention Expansion sealing adhesive tape are connected to the first door leaf, the 4th fire prevention expansion
Sealing joint strip is connected to second door leaf.
Optionally, it is provided with door closer at the top of the first door leaf and the second door leaf, the door closer is connected to institute
State the outer wall of frame body.
Optionally, it is bonded between the expanded pearlite rock beam and rock wool board by fire resistant adhesive.
Optionally, dry powder fire extinguishing agent is evenly distributed on the acoustical cotton.
Optionally, it is provided with buzzer in the fire-proof sound insulation clamshell doors, the buzzer is electrically connected with temperature sensor.
Optionally, door handle, the outer wall socket of the door handle are all had in the middle part of the first door leaf and the second door leaf
There is collet, the outer wall of the collet is coated with epoxy resin fireproof coating.
Optionally, first steel plate and the second steel plate are all made of the galvanized steel plain sheet with a thickness of 0.8mm.
Optionally, the frame body uses with a thickness of 1.2mm cold-rolling galvanization steel plate.
Optionally, the fire prevention filler is mortar mixture.
Compared with prior art, the utility model has the following beneficial effects:
The utility model provides a kind of fire-proof sound insulation clamshell doors, and doorframe has doorframe filled with fire prevention filler
Good structural strength, can effectively solving the problems, such as doorframe, deformation occurs due to heated, and door leaf adds expanded pearlite using steel plate
The set-up mode of rock beam and rock wool board, stabilized structure and fire protecting performance is good, wherein be additionally provided with sound-proof material between rock wool board, have
There is good soundproof effect, makes this fire-proof sound insulation clamshell doors that can meet the sound insulation demand of a variety of occasions；Moreover, being arranged on doorframe
Spray tube when heated, be sealed on the heated fusion of hot melt adhesive on spray port, the water in spray tube will be sprayed from spray port,
Can not only cool down to this fire-proof sound insulation clamshell doors, improve its resistance to burning, prevent door to be burned out and cause personnel can not and
When the case where escaping generation the intensity of a fire can be effectively prevent toward spreading behind the door moreover, spray tube directly sprays fire source, with
Personal safety and safety of property after protective door.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structural schematic diagram of fire-proof sound insulation clamshell doors；
Fig. 2 is the Section A-A figure in Fig. 1；
Fig. 3 is section B-B figure in Fig. 1.
It illustrates:
10, doorframe；11, frame body；12, fire prevention filler；13, connector mounting groove；14, hinge；
21, first door leaf；22, the second door leaf；211, the first steel plate；212, the second steel plate；213, expanded pearlite rock beam；
214, rock wool board；215, acoustical cotton；
31, the first fire prevention Expansion sealing adhesive tape；32, the second fire prevention Expansion sealing adhesive tape；33, third fire prevention expandable sealant
Item；34, the 4th fire prevention Expansion sealing adhesive tape；
41, spray tube；42, switch valve；
50, door closer；
61, door handle；62, collet.
Specific embodiment
It is practical below in conjunction with this to enable the purpose of this utility model, feature, advantage more obvious and understandable
Attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that under
The described embodiments are only a part of the embodiments of the utility model in face, and not all embodiment.Based on the utility model
In embodiment, all other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, fall within the protection scope of the utility model.
In the description of the present invention, it should be understood that when a component is considered as " connection " another component,
It can be directly to another component or may be simultaneously present the component being centrally located.When a component is considered as
" setting exists " another component, it, which can be, is set up directly on another component or may be simultaneously present the group being centrally located
Part.
In addition, the indicating positions such as term " length " " short " "inner" "outside" or positional relationship for the orientation that is shown based on attached drawing or
Person's positional relationship is merely for convenience of description the utility model, rather than the device or original part of indication or suggestion meaning must have
There is this specific orientation, operated with specific orientation construction, should not be understood as the limitation of the utility model with this.
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
It please refers to Fig.1 to Fig.3, Fig. 1 is a kind of structural schematic diagram of fire-proof sound insulation clamshell doors；Fig. 2 is that the A-A in Fig. 1 is cut
Face figure；Fig. 3 is section B-B figure in Fig. 1.
A kind of fire-proof sound insulation clamshell doors are present embodiments provided, including doorframe 10 and symmetrically arranged unidirectionally opened and closed
One door leaf 21 and the second door leaf 22；
Doorframe 10 includes hollow frame body 11, and the fire prevention filler 12 being filled in frame body 11；Frame
Ontology 11 offers connector mounting groove 13, and concealed type is equipped with hinge 14, first door leaf 21 and in connector mounting groove 13
Two door leafs 22 are articulated in doorframe 10 by hinge 14；The mode of concealed type installation can stash hinge 14, guarantee function
Under other of energy property, aesthetics is improved.
It should be noted that doorframe 10 may be because of heated and deformation occurs, when fire occurs so as to cause personnel
Stranded the problem of can not escaping in time, and the present embodiment fills fire prevention filler 12 in frame body 11, can effectively reinforce door
The structural strength of frame 10, a series of safety problems for preventing doorframe 10 deformation occurs and generate.
First door leaf 21 and the structure having the same of the second door leaf 22, including the first steel plate 211 and the second steel plate 212, the
One steel plate 211 and the second steel plate 212 are interconnected to form seal chamber；
Specifically, being symmetrical arranged in seal chamber there are two expanded pearlite rock beam 213, between two expanded pearlite rock beams 213
Two rock wool boards 214 are additionally provided with, are filled with acoustical cotton 215 between two rock wool boards 214；Expanded pearlite rock beam 213 has good
Fire protecting performance, and rock wool board 214 has an outstanding thermal insulation, acoustical cotton 215 can noise effectively after obstruct door, to be some high
The place of some environment that need peace and quiet such as shelves office, meeting room, bedroom provides sound insulation function, meet demand.
The junction of frame body 11 and first door leaf 21 and the second door leaf 22 is surrounded with the first fire prevention Expansion sealing
The outer wall surrounding of adhesive tape 31, first door leaf 21 and the second door leaf 22 be all provided with there are two second fire prevention Expansion sealing adhesive tape 32；
When fire occurs, fire prevention Expansion sealing adhesive tape meeting expanded by heating makes it body more closely be fitted in doorframe 10 and door
Between fan, the dense smoke in fire is effectively obstructed.
The top of doorframe 10 is also equipped with horizontal positioned spray tube 41, and the bottom of spray tube 41 offers multiple water sprays
Mouthful, water jet capping has hot melt adhesive；Spray tube 41 connects water system by switch valve 42.
It should be noted that the temperature of spray tube 41 can be increased with the sprawling of the intensity of a fire when fire spreading is in front of the door, envelope
The heated fusion of hot melt adhesive on spray port is covered, the water in spray tube 41 will be sprayed from spray port, not only can be to this fire prevention
The hair for the case where sound insulation clamshell doors cool down, and improve its resistance to burning, prevent door to be burned out and personnel is caused not escape in time
It is raw, moreover, spray tube 41 directly sprays fire source, can effectively prevent the intensity of a fire is past to spread behind the door, with after protective door the person,
Property safety.
The spray function of this fire-proof sound insulation clamshell doors is used multiple times, and after the intensity of a fire is effectively controlled, fire fighter can
Switch valve 42 is closed, to cut off the water source supplied by water system, to cover hot melt adhesive to spray port again；Work as hot melt adhesive
Switch valve 42 can be reopened after solidification, is connected to water system again, provided water source for spray tube 41, ensured spray function
It can effectively normal operation.
A kind of fire-proof sound insulation clamshell doors are present embodiments provided, doorframe 10 makes doorframe 10 filled with fire prevention filler 12
With good structural strength, can effectively solving the problems, such as doorframe 10, deformation occurs due to heated, and door leaf added using steel plate it is swollen
The set-up mode of swollen pearlite slab 213 and rock wool board 214, stabilized structure and fire protecting performance is good, wherein between rock wool board 214
It is additionally provided with sound-proof material, there is good soundproof effect, make this fire-proof sound insulation clamshell doors that can meet the sound insulation demand of a variety of occasions；And
And the spray tube 41 on doorframe 10 is set when heated, the hot melt adhesive being sealed on spray port is heated to be merged, in spray tube 41
Water will be sprayed from spray port, can not only cool down to this fire-proof sound insulation clamshell doors, improve its resistance to burning, prevent a quilt
The generation for the case where burning and personnel is caused not escape in time, moreover, spray tube 41 directly sprays fire source, it can be effective
Prevent the intensity of a fire toward spreading behind the door, with the personal safety and safety of property after protective door.
It is important to note that the present embodiment is not intended to be limited to such situation.
Further, third fire prevention Expansion sealing adhesive tape is additionally provided at the crack between a door and its frame between first door leaf 21 and the second door leaf 22
33 and the 4th fire prevention Expansion sealing adhesive tape 34, third fire prevention Expansion sealing adhesive tape 33 be connected to first door leaf 21, the 4th fire prevention is swollen
Swollen sealing joint strip 34 is connected to the second door leaf 22.The third fire prevention Expansion sealing adhesive tape 33 added and the 4th fire prevention expandable sealant
The dense smoke that item 34 can be effectively prevent in fire is past to spread behind the door.
Further, the top of first door leaf 21 and the second door leaf 22 is provided with door closer 50, and door closer 50 is connected to
The outer wall of frame body 11.The door closer 50 makes door leaf have the function of being automatically closed, and makes door leaf that can be chronically at closed state,
The effectively fire of barrier burst.
In this present embodiment, it is bonded between expanded pearlite rock beam 213 and rock wool board 214 by fire resistant adhesive.Benefit
Expanded pearlite rock beam 213 and rock wool board 214 are bonded with fire resistant adhesive, can further improve the structural strength of door leaf.
Further, dry powder fire extinguishing agent is evenly distributed on acoustical cotton 215.If the fire intensity of a fire of burst is excessive, make door leaf
It is burned out, the dry powder fire extinguishing agent in acoustical cotton 215 has certain flame retarding function, prevents acoustical cotton 215 from burning, avoids the intensity of a fire into one
Step sprawling.
Further, it is provided with buzzer in fire-proof sound insulation clamshell doors, buzzer is electrically connected with temperature sensor.Work as temperature
When the temperature that sensor is sensed is than or equal to critical value, buzzer then starts, and issues sound, informs that surrounding population has fire
Calamity occurs.
Further, the middle part of first door leaf 21 and the second door leaf 22 all has door handle 61, the outer wall set of door handle 61
It is connected to collet 62, the outer wall of collet 62 is coated with epoxy resin fireproof coating.Collet 62 can play certain heat insulation,
The people of escape is avoided to be burnt situation by door handle 61.
In this present embodiment, the first steel plate 211 and the second steel plate 212 are all made of the galvanized steel plain sheet with a thickness of 0.8mm, frame
Ontology 11 is using the cold-rolling galvanization steel plate with a thickness of 1.2mm, as obtained by experience, using the material of above-mentioned specification, is guaranteeing to tie
Under the premise of structure intensity, the dosage of the reduction material of maximizing, to significantly reduce production cost.
Further, fire prevention filler 12 is mortar mixture, which has good fire line, but also
Have the characteristics that acquisition is easy, the processing is simple, convenient for the quick installation of this fire-proof sound insulation clamshell doors.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (10)
1. a kind of fire-proof sound insulation clamshell doors, which is characterized in that including doorframe and the symmetrically arranged first door leaf unidirectionally opened and closed
With the second door leaf；
The doorframe includes hollow frame body, and the fire prevention filler being filled in the frame body；The frame
Ontology offers connector mounting groove, and concealed type is equipped with hinge, the first door leaf and second in the connector mounting groove
Door leaf is articulated in the doorframe by the hinge；
The first door leaf and the second door leaf structure having the same, including the first steel plate and the second steel plate, first steel plate
Seal chamber is interconnected to form with the second steel plate；
It is symmetrical arranged in the seal chamber there are two expanded pearlite rock beam, is additionally provided with two between two expanded pearlite rock beams
Rock wool board is filled with acoustical cotton between two rock wool boards；
The junction of the frame body and the first door leaf and the second door leaf is surrounded with the first fire prevention expandable sealant
The outer wall surrounding of item, the first door leaf and the second door leaf be all provided with there are two second fire prevention Expansion sealing adhesive tape；
Horizontal positioned spray tube is also equipped at the top of the doorframe, the bottom of the spray tube offers multiple water jets,
The water jet capping has hot melt adhesive；The spray tube connects water system by switch valve.
2. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that between the first door leaf and the second door leaf
Crack between a door and its frame at be additionally provided with third fire prevention Expansion sealing adhesive tape and the 4th fire prevention Expansion sealing adhesive tape, the third is prevented fires Expansion sealing
Adhesive tape is connected to the first door leaf, and the 4th fire prevention Expansion sealing adhesive tape is connected to second door leaf.
3. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that the top of the first door leaf and the second door leaf
Portion is provided with door closer, and the door closer is connected to the outer wall of the frame body.
4. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that the expanded pearlite rock beam and rock wool board it
Between be bonded by fire resistant adhesive.
5. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that be evenly distributed with dry powder on the acoustical cotton
Extinguishing chemical.
6. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that be provided in the fire-proof sound insulation clamshell doors
Buzzer, the buzzer are electrically connected with temperature sensor.
7. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that in the first door leaf and the second door leaf
Portion all has door handle, and the outer wall of the door handle is socketed with collet, and the outer wall of the collet is coated with epoxy resin fire prevention
Coating.
8. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that first steel plate and the second steel plate are adopted
With the galvanized steel plain sheet with a thickness of 0.8mm.
9. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that the frame body use with a thickness of
The cold-rolling galvanization steel plate of 1.2mm.
10. fire-proof sound insulation clamshell doors according to claim 1, which is characterized in that the fire prevention filler is mortar mixing
Object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821157571.6U CN208534358U (en) | 2018-07-20 | 2018-07-20 | A fireproof and soundproof door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821157571.6U CN208534358U (en) | 2018-07-20 | 2018-07-20 | A fireproof and soundproof door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208534358U true CN208534358U (en) | 2019-02-22 |
Family
ID=65385888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821157571.6U Active CN208534358U (en) | 2018-07-20 | 2018-07-20 | A fireproof and soundproof door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208534358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577098A (en) * | 2020-05-23 | 2020-08-25 | 周应惠 | Automatic fire-proof rolling shutter door with fire extinguishing function |
-
2018
- 2018-07-20 CN CN201821157571.6U patent/CN208534358U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577098A (en) * | 2020-05-23 | 2020-08-25 | 周应惠 | Automatic fire-proof rolling shutter door with fire extinguishing function |
| CN111577098B (en) * | 2020-05-23 | 2022-09-16 | 浙江鼎固特种门窗股份有限公司 | Automatic fire-proof rolling shutter door with fire extinguishing function |
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