CN113648560B - Water mist spraying rolling shutter door for fire fighting - Google Patents
Water mist spraying rolling shutter door for fire fighting Download PDFInfo
- Publication number
- CN113648560B CN113648560B CN202110879150.4A CN202110879150A CN113648560B CN 113648560 B CN113648560 B CN 113648560B CN 202110879150 A CN202110879150 A CN 202110879150A CN 113648560 B CN113648560 B CN 113648560B
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- fixed
- gear
- rotating shaft
- rolling door
- water mist
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/08—Water curtains
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/10—Fire-proof curtains
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/24—Operating or controlling mechanisms
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention relates to the technical field of roller shutter doors, in particular to a water mist spray roller shutter door for fire fighting, which extinguishes fire to a certain extent, prevents a roller shutter door main body from being burnt by big fire, blocks heat from diffusing outwards, strives for precious time for coming of subsequent firefighters, and improves the using effect of the device; the on-line screen storage device comprises a base, two sets of backup pads, the protective housing, the PLC controller, including a motor, an end cap, a controller, and a cover plate, first axis of rotation, the wind-up roll, the rolling slats door main part, first gear, the second axis of rotation, electric putter, first bevel gear, second bevel gear, the third axis of rotation, the fixed block, the rope, multiunit fixed pulley assembly, the clamp plate, the water tank, the baffle, communicating pipe, the atomizer, the pipe laying and multiunit atomizer, the left and right sides on base top is fixed to two sets of backup pads symmetry respectively, the top and the protective housing top inside wall of backup pad are connected, the bottom of protective housing is provided with the opening, and the PLC controller is fixed on protective housing top inside wall right side.
Description
Technical Field
The invention relates to the technical field of rolling doors, in particular to a water mist jet rolling door for fire fighting.
Background
A water mist spray roll door for fire protection is an auxiliary device for fire protection, which is widely used in the field of roll doors; the conflagration often can bring great loss for people, generally all be under the condition that does not have personnel's nurse, the probability of taking place the conflagration can be bigger, in case take place, when arriving the discovery, the rescue also can be considerable difficulty, in order to ensure property and people's safety, need be at indoor installation sprinkler bead, the sprinkler bead can be sprinkled and is prevented fires, but current rolling slats door does not possess the water spray function, the rolling slats door is burnt out easily when taking place the conflagration, and be difficult to block the heat and outwards spread, lead to the result of use of device relatively poor.
Disclosure of Invention
In order to solve the technical problems, the invention provides the fire-fighting water mist jet rolling door which can extinguish fire to a certain extent, prevent the rolling door body from being burnt by big fire, block heat from diffusing outwards, strive for precious time for subsequent fire fighters and improve the using effect of the rolling door.
The invention relates to a fire-fighting water mist spray rolling door, which comprises a base, two groups of supporting plates, a protective box, a PLC (programmable logic controller), a motor, a first rotating shaft, a rolling roller, a rolling door main body, a transmission mechanism, a pressing plate, a water tank, a partition plate, a communication pipe, an atomizer, a distribution pipe and a plurality of groups of atomizing nozzles, wherein the two groups of supporting plates are symmetrically fixed on the left side and the right side of the top end of the base respectively, the top ends of the supporting plates are connected with the inner side wall of the top end of the protective box, an opening is arranged at the bottom end of the protective box, the PLC is fixed on the right side of the inner side wall of the top end of the protective box and is electrically connected with the motor, the motor is fixed at the bottom of the inner side wall of the right side of the protective box, the output end of the motor is connected with the first rotating shaft, the first rotating shaft is rotatably connected with the upper parts of the two groups of the supporting plates, the rolling door main body is wound on the rolling roller, and the pressing plate is connected with the first rotating shaft through the transmission mechanism, the left end and the right end of the pressing plate are respectively clamped with the right end of the partition plate and the inner side wall of the right end of the water tank in a sliding mode, the water tank is fixed to the left side of the inner side wall of the bottom end of the protective box, a water inlet pipe is arranged at the left end of the water tank, the partition plate is fixed inside the water tank, the communicating pipe is fixed to the upper portion of the partition plate, a one-way electromagnetic valve is arranged on the communicating pipe, the one-way electromagnetic valve is electrically connected with the PLC, the atomizer is fixed to the upper portion of the right end of the water tank and is also electrically connected with the PLC, the output end of the atomizer is connected with the distribution pipe, the distribution pipe is fixed between the two groups of supporting plates and is located above the winding roller, and the multiple groups of atomization nozzles are evenly fixed to the bottom end of the distribution pipe; through PLC controller starter motor when the conflagration breaing out, make the motor drive first axis of rotation and wind-up roll and rotate, put down the rolling slats door main part step by step, and make drive mechanism with the clamp plate step by step rebound, water on baffle right side is impressed and is atomized in the atomizer through the clamp plate, and use through the cooperation of arranging pipe and atomizer, spray atomized water, then carry out putting out of certain degree with the fire, avoid the rolling slats door main part burnt out by the big fire, block heat outdiffusion simultaneously, strive for the valuable time for coming of follow-up fire fighter, the result of use of device has been improved.
The invention relates to a fire-fighting water mist spray rolling door, a transmission mechanism comprises a first gear, a second rotating shaft, an electric push rod, a first bevel gear, a second bevel gear, a third rotating shaft, a fixed block, a rope winding wheel, a rope and a plurality of groups of fixed pulley components, wherein the first gear is fixed on the left side of the first rotating shaft, the first gear is in meshing transmission connection with the second gear, the second gear is fixed on the left end of the second rotating shaft, the second rotating shaft is in rotating connection with the inner side wall of the right end of a protective box and is positioned above a motor, the electric push rod is fixed on the left end of the second gear and is electrically connected with a PLC (programmable logic controller), the output end of the electric push rod is connected with the first bevel gear, the first bevel gear is in meshing transmission connection with the second bevel gear, the second bevel gear is fixed at the bottom end of the third rotating shaft, the third rotating shaft is in rotating connection with the fixed block, the fixed block is fixed on a supporting plate on the right side, the rope winding wheel is fixedly sleeved on the third rotating shaft, one end of the rope is fixed on the rope winding wheel, the other end of the rope penetrates through the plurality of fixed pulley assemblies and is connected with the pressing plate, and the plurality of fixed pulley assemblies are uniformly fixed on the inner side wall of the top end of the protective box; control electric putter through the PLC controller for electric putter drives first bevel gear and second bevel gear meshing, first axis of rotation drives first gear revolve this moment, first gear is connected with second gear meshing transmission, make second gear drive electric putter and first bevel gear revolve, thereby make second bevel gear drive third axis of rotation and around the rope sheave rotate, use through the cooperation of around rope sheave and fixed pulley assembly, roll the rope, make the clamp plate rise steadily, the result of use of improve the device
The invention relates to a fire-fighting water mist jet rolling door, which further comprises a mounting plate, two groups of sliding blocks, a filter screen and two groups of fixing bolts, wherein the bottom end of the mounting plate is provided with a fixing groove, the top end of the mounting plate is provided with an opening, the two groups of sliding blocks are symmetrically fixed on the left side and the right side of the mounting plate respectively and are slidably clamped with the inner side wall of the left end of a water tank and the left end of a support plate respectively, the filter screen is fixed in the fixing groove of the mounting plate through the fixing bolts, the front end of the mounting plate is provided with a connecting plate, the connecting plate is in threaded connection with the front end of the water tank, and a buckle is arranged on the connecting plate; through setting up the filter screen, filter the water in the water tank, avoid aquatic impurity to enter into the pipe of arranging, avoid making the pipe of arranging and block up, simultaneously through setting up mounting panel and slider, be convenient for carry out periodic change to the filter screen, ensure the filter effect of filter screen, improve the use convenience of device.
The invention relates to a fire-fighting water mist spraying rolling door, which further comprises a smoke sensor and an alarm, wherein the smoke sensor is fixed on the right side of the bottom end of a protection box and is electrically connected with the alarm, and the alarm is electrically connected with a PLC (programmable logic controller); through setting up the cigarette sensor, monitor flue gas concentration, when the conflagration breaing out, feel sensor trigger siren through the cigarette and make the police dispatch newspaper, the siren transmits the PLC controller after will believing simultaneously, makes the instruction to the motor through the PLC controller, has avoided placing the emergence of conflagration through artifical real-time nurse, and it is laborsaving to save trouble, further improves the use convenience of device.
The invention relates to a fire-fighting water mist spray rolling door, which further comprises a sealing plate, a plurality of groups of fastening bolts and a handle, wherein the front end of a protective box is provided with an access hole, the sealing plate covers the access hole, the sealing plate and the protective box are in screwed connection through the fastening bolts, and the handle is fixed at the front end of the sealing plate; through setting up shrouding, fastening bolt and handle, the person of being convenient for carries out regular change and maintenance to the spare part of protective housing inside, shortens the maintenance duration, further improves the use convenience of device.
The invention relates to a water mist spray rolling door for fire fighting, which also comprises a dust screen, wherein a plurality of groups of heat dissipation holes are formed in the right side of the bottom end of a protection box, the dust screen covers the plurality of groups of heat dissipation holes, and the dust screen is fixed on the right side of the inner side wall of the bottom end of the protection box; through setting up louvre and dust screen, the heat dissipation of the motor of being convenient for avoids motor normal use time thermal ageing, ensures the life of motor.
The invention relates to a fire-fighting water mist spray rolling door, which also comprises a sealing ring, wherein the sealing ring is fixed at the joint of a rope and a water tank; through setting up the sealing washer, avoid the water in the water tank to follow the junction seepage of rope and water tank, improve the leakproofness of device.
The water mist spray rolling door for fire fighting also comprises a right-angle reinforcing block, wherein the right-angle reinforcing block is fixed on the inner side wall of the right end of the protective box and is rotatably connected with a second rotating shaft; through setting up the right angle boss, guarantee the stability when second axis of rotation rotates, improve the structural strength of device.
According to the water mist jet rolling door for fire fighting, lubricating oil is coated between the first gear and the second gear; by smearing lubricating oil, the friction loss between the second gear and the first gear is reduced, and the service life of the device is prolonged.
Compared with the prior art, the invention has the beneficial effects that: when a fire disaster happens, a motor is started through a PLC controller, the motor drives a first rotating shaft and a winding roller to rotate, a roller shutter door main body is gradually put down, an electric push rod is controlled through the PLC controller, the electric push rod drives a first bevel gear to be meshed with a second bevel gear, the first rotating shaft drives the first gear to rotate at the moment, the first gear is meshed with the second gear in a transmission connection mode, the second gear drives the electric push rod and the first bevel gear to rotate, the second bevel gear drives a third rotating shaft and a winding wheel to rotate, the rope is wound through the matching use of the winding wheel and a fixed pulley assembly, a pressing plate is gradually moved upwards, water on the right side of a partition plate is pressed into an atomizer through the pressing plate to be atomized, the atomized water is sprayed through the matching use of a distribution pipe and an atomization nozzle, and then the fire is extinguished to a certain degree, the roller shutter door main body is prevented from being burnt by fire, meanwhile, heat is blocked from diffusing outwards, precious time is strived for coming of follow-up fire fighters, and the using effect of the roller shutter door is improved.
Drawings
FIG. 1 is a schematic front view and partial cross-sectional structural view of the present invention;
FIG. 2 is a schematic front view of the protective enclosure of the present invention;
FIG. 3 is an enlarged schematic view of the invention at A;
FIG. 4 is an enlarged schematic view of the invention at B;
FIG. 5 is an enlarged schematic view of the invention at C;
in the drawings, the reference numbers: 1. a base; 2. a support plate; 3. a protective box; 4. a PLC controller; 5. a motor; 6. a first rotating shaft; 7. a wind-up roll; 8. a roller shutter door main body; 9. a first gear; 10. a second gear; 11. a second rotating shaft; 12. an electric push rod; 13. a first bevel gear; 14. a second bevel gear; 15. a third rotating shaft; 16. a fixed block; 17. a rope winding wheel; 18. a rope; 19. a fixed pulley assembly; 20. pressing a plate; 21. a water tank; 22. a partition plate; 23. a communicating pipe; 24. a one-way solenoid valve; 25. an atomizer; 26. arranging pipes; 27. an atomizing spray head; 28. mounting a plate; 29. a slider; 30. a filter screen; 31. fixing the bolt; 32. a smoke sensor; 33. an alarm; 34. closing the plate; 35. fastening a bolt; 36. a handle; 37. heat dissipation holes; 38. a dust screen; 39. a seal ring; 40. a right angle reinforcing block.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, in the fire-fighting water mist spray rolling door of the invention, when in operation, the smoke sensor 32 is arranged to monitor the smoke concentration, when a fire disaster occurs, the smoke sensor 32 triggers the alarm 33 to give an alarm, the alarm 33 transmits the signal to the PLC controller 4, the PLC controller 4 gives an instruction to the motor 5, thereby avoiding the occurrence of the fire disaster due to manual real-time nursing, saving labor and time, improving the convenience of the device, then the PLC controller 4 starts the motor 5, so that the motor 5 drives the first rotating shaft 6 and the winding roller 7 to rotate, the rolling door main body 8 is gradually put down, the PLC controller 4 controls the electric push rod 12, so that the electric push rod 12 drives the first bevel gear 13 to mesh with the second bevel gear 14, at this time, the first rotating shaft 6 drives the first gear 9 to rotate, the first gear 9 is in meshed transmission connection with the second gear 10, so that the second gear 10 drives the electric push rod 12 and the first bevel gear 13 to rotate, the second bevel gear 14 drives the third rotating shaft 15 and the rope winding wheel 17 to rotate, the rope 18 is wound through the matching use of the rope winding wheel 17 and the fixed pulley component 19, the pressing plate 20 moves upwards gradually, water on the right side of the partition plate 22 is pressed into the atomizer 25 through the pressing plate 20 to be atomized, the atomized water is sprayed through the matching use of the arrangement pipe 26 and the atomizing nozzle 27, then fire is extinguished to a certain degree, the rolling door main body 8 is prevented from being burnt by big fire, meanwhile, heat is prevented from diffusing outwards, precious time is won for the arrival of subsequent fire fighters, the using effect of the device is improved, then, the water in the water tank 21 is filtered through the arrangement of the filter screen 30, impurities in the water are prevented from entering the arrangement pipe 26, avoid causing the bank cloth pipe 26 to block up, simultaneously through setting up mounting panel 28 and slider 29, be convenient for carry out regular change to filter screen 30, ensure the filter effect of filter screen 30, further improve the convenience of use of device.
The main functions realized by the invention are as follows: compare with traditional rolling slats door, this scheme has water jet equipment, through outwards spraying water smoke, can delay the expansion of intensity of a fire to a great extent to effectively prevent thermal diffusion, for follow-up fire fighter's arrival provides the valuable time, improved the result of use of device.
The installation mode, the connection mode or the arrangement mode of the water mist spraying rolling door for fire fighting are common mechanical modes, and the installation mode, the connection mode or the arrangement mode can be implemented as long as the beneficial effects of the water mist spraying rolling door are achieved; the PLC 4, the fixed pulley assembly 19, the one-way electromagnetic valve 24, the atomizer 25, the smoke sensor 32 and the alarm 33 of the water mist spray rolling door for fire fighting are purchased from the market, and the installation and the operation of the PLC are carried out by the technical personnel in the industry according to the attached operating instructions without creative labor of the technical personnel in the field.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A water mist spray rolling door for fire fighting is characterized by comprising a base (1), two groups of supporting plates (2), a protective box (3), a PLC (programmable logic controller) controller (4), a motor (5), a first rotating shaft (6), a wind-up roll (7), a rolling door main body (8), a transmission mechanism, a pressing plate (20), a water tank (21), a partition plate (22), a communicating pipe (23), an atomizer (25), a distribution pipe (26) and a plurality of groups of atomizing nozzles (27);
the two groups of supporting plates (2) are respectively and symmetrically fixed at the left side and the right side of the top end of the base (1), the top ends of the supporting plates (2) are connected with the inner side wall of the top end of the protective box (3), the bottom end of the protective box (3) is provided with an opening, and the PLC controller (4) is fixed on the right side of the inner side wall of the top end of the protective box (3), and is electrically connected with a motor (5), the motor (5) is fixed at the bottom of the inner side wall of the right side of the protective box (3), the output end of the motor (5) is connected with a first rotating shaft (6), the first rotating shaft (6) is rotatably connected with the upper parts of the two groups of supporting plates (2), and the wind-up roll (7) is fixedly sleeved on the first rotating shaft (6), the rolling door main body (8) is wound on the wind-up roll (7), and the pressure plate (20) is connected with the first rotating shaft (6) through a transmission mechanism, the left end and the right end of the pressing plate (20) are respectively clamped with the right end of the clapboard (22) and the inner side wall of the right end of the water tank (21) in a sliding way;
water tank (21) are fixed in protective housing (3) bottom inside wall left side, the left end of water tank (21) is provided with the inlet tube, and baffle (22) are fixed inside water tank (21), the upper portion at baffle (22) is fixed communicating pipe (23), and be provided with one-way solenoid valve (24) on communicating pipe (23), one-way solenoid valve (24) and PLC controller (4) electric connection, and right-hand member upper portion at water tank (21) is fixed in atomizer (25), and also with PLC controller (4) electric connection, and the output and the cloth arranging pipe (26) of atomizer (25) are connected, cloth arranging pipe (26) are fixed between two sets of backup pads (2), and be located the top of wind-up roller (7), and the bottom at cloth arranging pipe (26) is evenly fixed in multiunit atomizer (27).
2. The water mist spray rolling door for fire fighting as recited in claim 1, wherein the transmission mechanism comprises a first gear (9), a second gear (10), a second rotating shaft (11), an electric push rod (12), a first bevel gear (13), a second bevel gear (14), a third rotating shaft (15), a fixed block (16), a rope winding wheel (17), a rope (18) and a plurality of sets of fixed pulley assemblies (19), the first gear (9) is fixed on the left side of the first rotating shaft (6), the first gear (9) is in meshing transmission connection with the second gear (10), the second gear (10) is fixed on the left end of the second rotating shaft (11), the second rotating shaft (11) is in rotational connection with the inner side wall of the right end of the protection box (3) and is located above the motor (5), and the electric push rod (12) is fixed on the left end of the second gear (10) and is electrically connected with the PLC controller (4), the output of electric putter (12) is connected with first bevel gear (13), but first bevel gear (13) and second bevel gear (14) meshing transmission are connected, and second bevel gear (14) are fixed in the bottom of third axis of rotation (15), third axis of rotation (15) are rotated with fixed block (16) and are connected, fixed block (16) are fixed on backup pad (2) on right side, and around fixed suit of rope sheave (17) on third axis of rotation (15), the one end of rope (18) is fixed on around rope sheave (17), the other end passes multiunit fixed pulley assembly (19), and be connected with clamp plate (20), multiunit fixed pulley assembly (19) are evenly fixed on protection box (3) top inside wall.
3. The water mist spray rolling door for fire fighting as recited in claim 1, further comprising a mounting plate (28), two sets of sliding blocks (29), a filter screen (30) and two sets of fixing bolts (31), wherein the bottom end of the mounting plate (28) is provided with a fixing groove, the top end of the mounting plate is provided with an opening, the two sets of sliding blocks (29) are symmetrically fixed on the left side and the right side of the mounting plate (28) respectively and are slidably clamped with the inner side wall of the left end of the water tank (21) and the left end of the support plate (2) respectively, the filter screen (30) is fixed in the fixing groove of the mounting plate (28) through the fixing bolt (31), the front end of the mounting plate (28) is provided with a connecting plate, the connecting plate is in threaded connection with the front end of the water tank (21), and a buckle is arranged on the connecting plate.
4. A fire-fighting water mist spray rolling door according to claim 2, characterized in that it further comprises a smoke sensor (32) and an alarm (33), the smoke sensor (32) is fixed on the right side of the bottom end of the protection box (3) and is electrically connected with the alarm (33), and the alarm (33) is electrically connected with the PLC controller (4).
5. A fire-fighting water mist spray rolling door according to claim 3, further comprising a sealing plate (34), a plurality of sets of fastening bolts (35) and a handle (36), wherein the front end of the protection box (3) is provided with an access opening, the sealing plate (34) covers the access opening, the sealing plate (34) and the protection box (3) are connected by the fastening bolts (35) in a screw-fit manner, and the handle (36) is fixed to the front end of the sealing plate (34).
6. The water mist spray rolling door for fire fighting as recited in claim 4, further comprising a dust screen (38), wherein the right side of the bottom end of the protection box (3) is provided with a plurality of sets of heat dissipation holes (37), the dust screen (38) covers the plurality of sets of heat dissipation holes (37), and the dust screen (38) is fixed on the right side of the inner side wall of the bottom end of the protection box (3).
7. A fire fighting water mist jet rolling door as recited in claim 5, further comprising a packing (39), the packing (39) being fixed at a junction of the rope (18) and the water tank (21).
8. A fire fighting water mist spray rolling door according to claim 6, further comprising a right angle reinforcing block (40), the right angle reinforcing block (40) being fixed to an inner side wall of a right end of the protection box (3) and being rotatably connected to the second rotating shaft (11).
9. A fire water mist spray rolling door according to claim 7, characterized in that lubricating oil is applied between the first gear (9) and the second gear (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879150.4A CN113648560B (en) | 2021-08-02 | 2021-08-02 | Water mist spraying rolling shutter door for fire fighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879150.4A CN113648560B (en) | 2021-08-02 | 2021-08-02 | Water mist spraying rolling shutter door for fire fighting |
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| CN113648560A CN113648560A (en) | 2021-11-16 |
| CN113648560B true CN113648560B (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110879150.4A Active CN113648560B (en) | 2021-08-02 | 2021-08-02 | Water mist spraying rolling shutter door for fire fighting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115012796A (en) * | 2022-05-21 | 2022-09-06 | 施翔 | Security protection rolling slats door |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4656749B2 (en) * | 2001-04-13 | 2011-03-23 | 文化シヤッター株式会社 | Opening and closing body device |
| KR101718326B1 (en) * | 2016-07-29 | 2017-03-21 | (주)경진건축사사무소 | Apartment house fire door structure |
| CN208448468U (en) * | 2018-06-08 | 2019-02-01 | 漳州市金安机电有限公司 | A kind of novel double-layer isolation fire fighting folding door structure |
| CN211008359U (en) * | 2019-10-18 | 2020-07-14 | 山东安舜消防设备有限公司 | Double-track double-curtain fireproof rolling door suitable for inclined ground |
| CN111577104B (en) * | 2020-05-23 | 2023-01-10 | 山东霍曼德安防科技有限公司 | Self-triggering fireproof rolling shutter door with good safety |
| CN213297771U (en) * | 2020-06-22 | 2021-05-28 | 云南拓越电子工程有限公司 | Special rolling slats door of bank |
| CN112963077A (en) * | 2021-03-02 | 2021-06-15 | 广州蓉华门业股份有限公司 | Automatic inorganic fire prevention rolling slats door opens and shuts |
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