CN112240150A - Steel flame-retardant heat-insulation fireproof door - Google Patents
Steel flame-retardant heat-insulation fireproof door Download PDFInfo
- Publication number
- CN112240150A CN112240150A CN202011098125.4A CN202011098125A CN112240150A CN 112240150 A CN112240150 A CN 112240150A CN 202011098125 A CN202011098125 A CN 202011098125A CN 112240150 A CN112240150 A CN 112240150A
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- Prior art keywords
- plate
- door
- smoke
- sandwich
- air suction
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- 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.)
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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
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
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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
- 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
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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
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
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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
- 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
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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
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
- E06B2007/023—Air flow induced by fan
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Special Wing (AREA)
Abstract
The invention belongs to the field of building materials, and particularly relates to a steel flame-retardant heat-insulation fireproof door which comprises a door plate and a door frame, wherein the door plate is provided with an outer plate and an inner plate for heat insulation and fire prevention, and a sandwich plate is arranged between the outer plate and the inner plate; the sandwich plate utilizes a plurality of air suction holes A arranged on the peripheral wall of the sandwich plate to suck away the flue gas; the door frame is provided with an air draft plate, and the air draft plate utilizes an air draft hole C formed in the air draft plate to secondarily pump away smoke; a baffle plate is movably inserted into the door frame on the side of the exhaust plate, and the position of the baffle plate is adjusted through a telescopic cylinder arranged on the door frame; the sandwich plate utilizes a plurality of air suction holes A arranged on the peripheral wall of the sandwich plate to suck away smoke, and is matched with the air suction holes C arranged on the air suction plate to suck away the smoke for the second time, so that all-dimensional smoke suction is formed, and the smoke is prevented from entering a room to the inside; the position of the baffle plate is finely adjusted by starting the telescopic gas, and the gap of the baffle plate is isolated, so that the smoke is prevented from entering, and meanwhile, the flame is prevented from entering the room through the gap.
Description
Technical Field
The invention relates to the technical field of energy conservation in cement production, in particular to a steel flame-retardant heat-insulation fireproof door.
Background
A fire door is a door that can meet the requirements of fire stability, integrity and thermal insulation within a certain period of time. It is a fire-proof partition with certain fire resistance, which is arranged in fire-proof subareas, evacuation staircases, vertical shafts and the like.
The fireproof door has the functions of a common door, has the functions of preventing the fire from spreading and the smoke from diffusing, and can prevent the fire from spreading within a certain time to ensure the evacuation of people.
The fire door is an important component in fire-fighting equipment and is an important part in social fire prevention, and a door closer of the fire door or a door closing device which can automatically close a door leaf of a normally open fire door is arranged on the fire door. That is, except for some special parts, such as the pipe well door, which do not need to be installed with a door closer, other parts need to be installed with a door closer of the fire door.
The fireproof steel door has door frame, door frame and door panel made of steel material, and door filled with fireproof heat insulating material and fireproof hardware fitting.
After the fireproof door is applied to a community, after a fire disaster occurs to a corridor or other residents, smoke can enter other residents through the corridor and a door gap to suffocate the other residents, and the existing steel fireproof door can insulate heat and prevent fire, but cannot prevent the smoke from entering.
Disclosure of Invention
The invention aims to provide a steel flame-retardant heat-insulation fireproof door to solve the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme:
the steel flame-retardant heat-insulation fireproof door comprises a door plate and a door frame, wherein the door plate is hinged on the door frame; the door panel is provided with an outer plate and an inner plate for heat insulation and fire prevention, and a sandwich plate is clamped between the outer plate and the inner plate; the sandwich plate utilizes a plurality of air suction holes A formed in the peripheral wall of the sandwich plate to suck away smoke, a concave cavity communicated with the air suction holes A is formed in the sandwich plate, and the concave cavity is externally connected with an exhaust fan through a connecting hose B;
a plurality of air draft plates are arranged on one side surface of the door frame close to the door panel, the air draft plates are externally connected to an exhaust fan, and secondary exhaust of smoke is carried out by utilizing air draft holes C formed in the air draft plates; the door frame on the side of the exhaust plate is movably inserted with a baffle plate, and the baffle plate is adjusted in position through a telescopic cylinder arranged on the door frame.
When a fire disaster happens, the exhaust fan is started, and the interlayer plate arranged on the door panel is matched; the sandwich plate utilizes a plurality of air suction holes A formed in the peripheral wall of the sandwich plate to suck away smoke, and is matched with the air suction holes C formed in the air suction plate to suck away the smoke for the second time, so that all-dimensional smoke suction is formed, and the smoke is prevented from entering a room to the inside; the position of the baffle plate is finely adjusted by starting the telescopic gas, and a baffle gap is isolated, so that the smoke is prevented from entering and the flame is prevented from entering the room through the gap.
The problem of use in the district after, after corridor or other residents take place the fire disaster, smog can enter into other residents through corridor and crack, and cause other residents to suffocate is solved, although current fire door can insulate against heat and prevent fires, can't block the smog and get into.
In the steel flame-retardant heat-insulating fireproof door of the invention: inside the air draft hole A installs additional and filters the sieve to utilize and filter the impurity that the sieve carried out in the smoke and dust, avoid impurity to enter into the cavity inside, the extrusion causes the jam.
In the steel flame-retardant heat-insulating fireproof door of the invention: the cavity is internally provided with a plurality of support column structures which are distributed at equal intervals, and the cavity strengthens the strength of the sandwich plate through the support column structures.
Furthermore, the support column structure is hexagonal prism-shaped, and a plurality of pores are arranged on the peripheral wall of the support column structure, and the support column structure is used for filtering and removing smoke dust.
In the steel flame-retardant heat-insulating fireproof door of the invention: an outer baffle edge is arranged on the sandwich plate outside the concave cavity, and the air suction hole A penetrates through the outer baffle edge; an inner supporting plate is arranged on the sandwich plate on the inner side of the concave cavity.
In the steel flame-retardant heat-insulating fireproof door of the invention: the two air draft plates are symmetrically distributed on the door frames on the two sides of the baffle plate; the partition board is provided with a penetration inserting board B, and the penetration inserting board B is connected with an outer partition board.
In the steel flame-retardant heat-insulating fireproof door of the invention: the bottom of the door plate is movably inserted with a lower moving plate and is suitable for various installation environments, a groove is formed in the bottom of the door plate in a matching mode with the lower moving plate, a button is fixed on the outer portion of the lower moving plate, and the button drives the lower moving plate to move to separate the barrier.
Furthermore, a penetrating inserting plate A is arranged on the lower moving plate, a baffle plate A is fixed on the penetrating plate A, a plurality of air exhaust holes B are formed in the baffle plate A, and the air exhaust holes B are communicated with a connecting hose A penetrating through the penetrating plate A.
In the steel flame-retardant heat-insulating fireproof door of the invention: the door plate is provided with a door handle, and the door plate is internally provided with a lock matched with the door handle.
Compared with the prior art, the steel flame-retardant heat-insulation fireproof door comprises a door plate and a door frame, wherein the door plate is provided with an outer plate and an inner plate for heat insulation and fire prevention, and a sandwich plate is clamped between the outer plate and the inner plate; the sandwich plate utilizes a plurality of air suction holes A formed in the peripheral wall of the sandwich plate to suck away smoke, a concave cavity communicated with the air suction holes A is formed in the sandwich plate, and the concave cavity is externally connected with an exhaust fan through a connecting hose B; a plurality of air draft plates are arranged on one side surface of the door frame close to the door panel, the air draft plates are externally connected to an exhaust fan, and secondary exhaust of smoke is carried out by utilizing air draft holes C formed in the air draft plates; a baffle plate is movably inserted into the door frame on the side of the exhaust plate, and the position of the baffle plate is adjusted through a telescopic cylinder arranged on the door frame; the sandwich plate utilizes a plurality of air suction holes A arranged on the peripheral wall of the sandwich plate to suck away smoke, and is matched with the air suction holes C arranged on the air suction plate to suck away the smoke for the second time, so that all-dimensional smoke suction is formed, and the smoke is prevented from entering a room to the inside; the position of the baffle plate is finely adjusted by starting the telescopic gas, and a baffle gap is isolated, so that the smoke is prevented from entering and the flame is prevented from entering the room through the gap.
Drawings
FIG. 1 is a schematic view of a steel fire-retardant, heat-insulating and fire-proof door according to the present invention;
FIG. 2 is a schematic structural view of the door panel of FIG. 1;
FIG. 3 is a partial structural diagram of the door panel of FIG. 2 viewed from the right;
FIG. 4 is a schematic structural view of the sandwich panel of FIG. 2;
FIG. 5 is a schematic view of the structure of the lower moving plate of FIG. 1;
fig. 6 is a schematic structural view of the doorframe of fig. 1.
Fig. 7 is a schematic view of the baffle of fig. 6.
In the figure:
1-door plate, 2-door handle, 3-lower movable plate, 4-door frame;
11-outer plate, 12-sandwich plate, 13-lock, 14-inner plate, 15-air draft hole A;
31-connecting hoses A, 32-inserting plates A, 33-baffles A and 34-air exhaust holes B;
41-an air draft hole C, 42-a baffle plate, 43-an air draft plate, 44-an outer baffle plate and 45-a penetration plate B;
121-outer flange, 122-connecting hose B, 123-support column structure, 124-inner support plate, 125-concave cavity.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following embodiments; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The invention aims to solve the problems that after the fireproof steel fire door is applied to a community and after a fire disaster occurs in a corridor or other residents, smoke can enter other residents through the corridor and a door gap to suffocate the other residents, and the existing steel fire door can insulate heat and prevent fire but cannot prevent the smoke from entering. In order to achieve the purpose, the invention provides the following technical scheme:
in the embodiment of the invention, as shown in fig. 1-4 and 6: the steel flame-retardant heat-insulation fireproof door comprises a door plate 1 and a door frame 4, wherein the door plate 1 is hinged to the door frame 4;
the door panel 1 is provided with an outer plate 11 and an inner plate 14 for heat insulation and fire prevention, and a sandwich plate 12 is arranged between the outer plate 11 and the inner plate 14 in a clamping manner;
the sandwich plate 12 utilizes a plurality of air exhaust holes A15 arranged on the peripheral wall of the sandwich plate for exhausting the smoke, a concave cavity 125 communicated with the air exhaust hole A15 is arranged in the sandwich plate 12, and the concave cavity 125 is externally connected with an exhaust fan through a connecting hose B122;
a plurality of air draft plates 43 are arranged on one side surface of the door frame 4 close to the door panel 1, the air draft plates 43 are externally connected to an air draft fan, and secondary air draft is carried out by utilizing air draft holes C41 formed in the air draft plates 43;
a baffle plate 42 is movably inserted into the door frame 4 on the side of the air draft plate 43, and the position of the baffle plate 42 is adjusted by a telescopic cylinder arranged on the door frame 4.
When a fire disaster happens, the exhaust fan is started, and the sandwich plate 12 arranged on the door panel 1 is matched; the sandwich plate 12 utilizes a plurality of air suction holes A15 arranged on the peripheral wall of the sandwich plate to suck the smoke, and is matched with the air suction holes C41 arranged on the air suction plate 43 to suck the smoke for the second time, so that all-directional smoke suction is formed, and the smoke is prevented from entering the room to the inside; and meanwhile, the telescopic gas is started to finely adjust the position of the baffle plate 42 and separate the gap, so that the smoke is prevented from entering, and meanwhile, the flame is prevented from entering the room through the gap.
In the embodiment of the present invention, as shown in fig. 2 and 3, a filtering sieve plate is additionally installed inside the air suction hole a15, and impurities in smoke dust are filtered by the filtering sieve plate, so that the impurities are prevented from entering the cavity 125 and being blocked due to extrusion.
In the embodiment of the present invention, as shown in fig. 4: a plurality of supporting column structures 123 distributed at equal intervals are arranged inside the cavity 125, and the cavity 125 strengthens the strength of the sandwich plate 12 through the supporting column structures 123; specifically, the supporting pillar structure 123 is hexagonal prism-shaped, and a plurality of fine holes are formed in the peripheral wall, and the fine holes are used for filtering and removing smoke dust.
In the embodiment of the invention, as shown in fig. 1-4 and 7: an outer baffle edge 121 is arranged on the sandwich plate 12 outside the concave cavity 125, and the air draft hole A15 penetrates through the outer baffle edge 121; an inner supporting plate 124 is arranged on the sandwich plate 12 at the inner side of the cavity 125; the two air draft plates 43 are symmetrically distributed on the door frames 4 at the two sides of the baffle plate 42; the baffle plate 42 is provided with a penetration inserting plate B45, and an outer baffle plate 44 is connected on the penetration inserting plate B45.
In the embodiment of the invention, as shown in fig. 1-2 and 5: the door panel 1 is provided with a door handle 2, and the door panel 1 is internally provided with a lock 13 matched with the door handle 2. The lower moving plate 3 is movably inserted at the bottom of the door panel 1 and is suitable for various installation environments, a groove is formed in the bottom of the door panel 1 in a matching mode with the lower moving plate 3, a button is fixed on the outer portion of the lower moving plate 3, and the button is used for driving the lower moving plate 3 to move to separate a barrier; specifically, the lower moving plate 3 is provided with a through inserting plate a32, a baffle a33 is fixed on the through inserting plate a32, the baffle a33 is provided with a plurality of air draft holes B34, and the air draft holes B34 are communicated with a connecting hose a31 penetrating through the through inserting plate a 32.
The invention relates to a steel flame-retardant heat-insulation fireproof door, which comprises a door panel 1 and a door frame 4, wherein the door panel 1 is provided with an outer plate 11 and an inner plate 14 for heat insulation and fire prevention, and a sandwich plate 12 is arranged between the outer plate 11 and the inner plate 14 in a clamping manner; the sandwich plate 12 utilizes a plurality of air exhaust holes A15 arranged on the peripheral wall of the sandwich plate for exhausting the smoke, a concave cavity 125 communicated with the air exhaust hole A15 is arranged in the sandwich plate 12, and the concave cavity 125 is externally connected with an exhaust fan through a connecting hose B122; a plurality of air draft plates 43 are arranged on one side surface of the door frame 4 close to the door panel 1, the air draft plates 43 are externally connected to an air draft fan, and secondary air draft is carried out by utilizing air draft holes C41 formed in the air draft plates 43; a baffle plate 42 is movably inserted in the door frame 4 on the side edge of the air draft plate 43, and the position of the baffle plate 42 is adjusted through a telescopic cylinder arranged on the door frame 4; the sandwich plate 12 utilizes a plurality of air suction holes A15 arranged on the peripheral wall of the sandwich plate to suck the smoke, and is matched with the air suction holes C41 arranged on the air suction plate 43 to suck the smoke for the second time, so that all-directional smoke suction is formed, and the smoke is prevented from entering the room to the inside; and meanwhile, the telescopic gas is started to finely adjust the position of the baffle plate 42 and separate the gap, so that the smoke is prevented from entering, and meanwhile, the flame is prevented from entering the room through the gap.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. The steel flame-retardant heat-insulation fireproof door comprises a door plate (1) and a door frame (4), wherein the door plate (1) is hinged on the door frame (4); it is characterized in that the preparation method is characterized in that,
the door panel (1) is provided with an outer plate (11) and an inner plate (14) for heat insulation and fire prevention, and a sandwich plate (12) is arranged between the outer plate (11) and the inner plate (14);
the sandwich plate (12) utilizes a plurality of air exhaust holes A (15) formed on the peripheral wall of the sandwich plate to exhaust the flue gas, a concave cavity (125) communicated with the air exhaust holes A (15) is formed in the sandwich plate (12), and the concave cavity (125) is externally connected with an exhaust fan through a connecting hose B (122);
a plurality of air suction plates (43) are arranged on one side surface of the door frame (4) close to the door panel (1), the air suction plates (43) are externally connected to an exhaust fan, and secondary exhaust of smoke is performed by utilizing air suction holes C (41) formed in the air suction plates (43);
a baffle plate (42) is movably inserted into the door frame (4) at the side edge of the air draft plate (43), and the position of the baffle plate (42) is adjusted through a telescopic cylinder arranged on the door frame (4).
2. The fire door as claimed in claim 1, wherein a filtering screen plate is installed inside the ventilation hole a (15).
3. A fire door according to claim 1, characterised in that the cavity (125) is internally provided with a plurality of equally spaced supporting post structures (123), and the cavity (125) reinforces the sandwich panel (12) by the supporting post structures (123).
4. The fire door as claimed in claim 3, wherein the supporting pillar structure (123) is hexagonal prism shaped, and has a plurality of pores on its peripheral wall for filtering smoke.
5. The fire resistant, insulating and fire door as claimed in claim 1,
an outer blocking edge (121) is arranged on the sandwich plate (12) outside the cavity (125), and the air suction hole A (15) penetrates through the outer blocking edge (121);
an inner supporting plate (124) is arranged on the sandwich plate (12) at the inner side of the concave cavity (125).
6. The fire door as claimed in claim 1, characterized in that said two suction panels (43) are arranged symmetrically on the frame (4) on both sides of the barrier panel (42); the baffle plate (42) is provided with a penetration inserting plate B (45), and the penetration inserting plate B (45) is connected with an outer baffle plate (44).
7. The fire door as claimed in claim 1, wherein the lower moving plate (3) is movably inserted into the bottom of the door panel (1), the bottom of the door panel (1) is provided with a groove matching with the lower moving plate (3), and a button is fixed outside the lower moving plate (3) and used for driving the lower moving plate (3) to move for blocking.
8. The steel flame-retardant heat-insulating fireproof door according to claim 7, wherein the lower moving plate (3) is provided with a through insertion plate A (32), a baffle A (33) is fixed on the through insertion plate A (32), the baffle A (33) is provided with a plurality of air suction holes B (34), and the air suction holes B (34) are communicated with a connecting hose A (31) penetrating through the through insertion plate A (32).
9. The fire door as claimed in any one of claims 1 to 8, wherein a door handle (2) is mounted on said door panel (1), and a lock (13) is provided inside said door panel (1) in cooperation with said door handle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011098125.4A CN112240150A (en) | 2020-10-14 | 2020-10-14 | Steel flame-retardant heat-insulation fireproof door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011098125.4A CN112240150A (en) | 2020-10-14 | 2020-10-14 | Steel flame-retardant heat-insulation fireproof door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112240150A true CN112240150A (en) | 2021-01-19 |
Family
ID=74169096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011098125.4A Pending CN112240150A (en) | 2020-10-14 | 2020-10-14 | Steel flame-retardant heat-insulation fireproof door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112240150A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2138947A1 (en) * | 1971-08-04 | 1973-02-15 | Harald Vetter | VENTILATION SYSTEM |
| CN205638053U (en) * | 2016-05-12 | 2016-10-12 | 陈傲 | Discharge fume and prevent fire door frame |
| CN106522751A (en) * | 2016-11-30 | 2017-03-22 | 重庆坤秀门窗有限公司 | High-temperature-resistant door plank structure |
| CN107035287A (en) * | 2017-06-19 | 2017-08-11 | 天津龙甲特种门窗有限公司 | A kind of fire resistant doorsets with anti-hood |
| CN209942641U (en) * | 2018-12-12 | 2020-01-14 | 天津市格林门业有限公司 | Reinforced silencing fireproof door |
| CN111287617A (en) * | 2020-03-23 | 2020-06-16 | 南通金亿达门业有限公司 | Functional door with high sealing effect and multiple locking structures |
-
2020
- 2020-10-14 CN CN202011098125.4A patent/CN112240150A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2138947A1 (en) * | 1971-08-04 | 1973-02-15 | Harald Vetter | VENTILATION SYSTEM |
| CN205638053U (en) * | 2016-05-12 | 2016-10-12 | 陈傲 | Discharge fume and prevent fire door frame |
| CN106522751A (en) * | 2016-11-30 | 2017-03-22 | 重庆坤秀门窗有限公司 | High-temperature-resistant door plank structure |
| CN107035287A (en) * | 2017-06-19 | 2017-08-11 | 天津龙甲特种门窗有限公司 | A kind of fire resistant doorsets with anti-hood |
| CN209942641U (en) * | 2018-12-12 | 2020-01-14 | 天津市格林门业有限公司 | Reinforced silencing fireproof door |
| CN111287617A (en) * | 2020-03-23 | 2020-06-16 | 南通金亿达门业有限公司 | Functional door with high sealing effect and multiple locking structures |
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Application publication date: 20210119 |
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| RJ01 | Rejection of invention patent application after publication |