CN211923983U - Forming reinforced fireproof door - Google Patents
Forming reinforced fireproof door Download PDFInfo
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- CN211923983U CN211923983U CN202020209659.9U CN202020209659U CN211923983U CN 211923983 U CN211923983 U CN 211923983U CN 202020209659 U CN202020209659 U CN 202020209659U CN 211923983 U CN211923983 U CN 211923983U
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Abstract
The utility model relates to a shaped reinforced fireproof door, which comprises a door frame and a door plate, wherein the door plate is matched with the door frame, the inner peripheral surface of the door frame is provided with a first notch, and the periphery of the door plate is provided with a second notch which is just opposite to the first notch; a closed air chamber is arranged in the door plate, and a step pore passage for communicating the second notch with the closed air chamber is arranged in the closed air chamber; pressure pistons are hermetically slid in the step pore passages, and a connecting rod and a sealing strip are respectively fixed at two ends of each pressure piston; the front side and the back side of the door plate are both provided with pressure relief devices for controlling the air pressure of the closed air chamber; the first notches at the four corners of the door frame are embedded with sealing blocks. Adopt above-mentioned technical scheme, the gap between door frame and the door plant can be effectively the shutoff, has promoted this and has prevented fire door to the holistic isolated effect of smog, improves the protection of preventing fire door and keeping away from personnel's lives and property on one side of the scene of a fire.
Description
Technical Field
The utility model belongs to the technical field of the technique of fire control facility and specifically relates to a fire door is prevented to shaping strenghthened type.
Background
The fireproof door is a door which can meet the requirements of fire resistance stability, structural integrity and good smoke isolation property within a certain time, is usually arranged at a position with fire prevention requirements such as a fire prevention separation area, a stair scattering opening and a vertical shaft, and has an effective isolation effect on sudden fire, so that the fireproof door is widely applied to modern building construction.
The smoke generated in the fire can cause the trapped people to have oxygen deficiency, thus seriously endangering the safety of the trapped people. To the smog that produces when the conflagration takes place, present prevent fire door carries out the shutoff through modes such as adhesion sealing strip on preventing fire door's frame to the gap between fire door and the door frame to isolated smog.
The above prior art solutions have the following drawbacks: the existing fireproof door isolates smoke, a gap between the fireproof door and a door frame is plugged in a mode that sealing strips are adhered to the periphery of a door plate, and colloid adhered to the sealing strips is easy to age and lose efficacy, so that the sealing strips fall off; meanwhile, the sealing strip is very easy to lose effectiveness under the condition of serious fire, the smoke is difficult to be effectively isolated when the fire disaster happens, and high requirements are provided for the fire resistance of the sealing strip. There is room for improvement.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a fire door is prevented to shaping strenghthened type has realized the effective shutoff in door plant and doorframe gap to the smog that the conflagration produced.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a molding reinforced fireproof door comprises a door frame and a door plate which is installed in a matched mode with the door frame, wherein first notches which are mutually communicated are formed in the inner peripheral surface of the door frame, second notches which are mutually communicated are formed in the peripheries, opposite to the door frame, of the door plate, and the first notches and the second notches are opposite; the door plate is internally provided with a closed air chamber, and the closed air chambers are provided with step pore canals which are used for communicating the second notch with the closed air chamber; pressure pistons are hermetically slid in the step pore channels, one end, far away from the closed air chamber, of each pressure piston is fixedly provided with a connecting rod, the other end of each connecting rod is vertically fixedly provided with a sealing strip, and each sealing strip is in inserted fit with the second notch; the door plate comprises a front side and a back side, and the front side and the back side of the door plate are both provided with pressure relief devices for controlling the air pressure of the closed air chamber; the first notches at the four corners of the door frame are embedded with sealing blocks.
By adopting the technical scheme, the door plate is matched and mounted on the door frame, the closed air chamber is arranged inside the door plate and is communicated with the step pore channel, the pressure piston is arranged inside the step pore channel, the sealing strip is connected with the pressure piston through the connecting rod, the first notch is formed in the door frame, when a fire disaster happens, air in the closed air chamber expands due to heating, the pressure piston pushes the sealing strip to move towards the first notch in the door frame, and the sealing strip seals a gap between the door plate and the door frame, so that smoke on the fire scene is prevented from permeating the gap between the door plate and the door frame; the design of the pressure relief device enables rescue workers or escape personnel to relieve pressure of the closed air chamber, the sealing strip is separated from the first notch, the fireproof door can be opened smoothly, and the protection on the life and property safety of the indoor personnel is improved; be provided with sealed piece in the first notch in door frame four corners, when the conflagration takes place, the sealing strip is inserted and is inserted in first notch, to the position in door frame four corners, two sealing strips insert respectively and insert in relative first notch in this position, cause the four corners of door frame to appear a space of failing the shutoff, this sealed piece has filled this space, make the gap between door frame and the door plant can be totally by the shutoff, smog has been avoided overflowing in this not shutoff space, this prevents that fire door is to the holistic isolated effect of smog, be favorable to improving the leakproofness of preventing fire door, isolated delay, the improvement is to preventing the protection of preventing fire door and keeping away from the personnel's lives and properties on one side of the fire scene.
The present invention may be further configured in a preferred embodiment as: the pressure relief device comprises pressure relief ducts, each of which is communicated with the closed air chamber, a pair of L-shaped right-angle notches which are symmetrical with respect to the axis of the pressure relief duct are arranged on the hole wall of each pressure relief duct, the vertical sections of the right-angle notches are parallel to the axis of the pressure relief duct, a pressure relief piston slides in the pressure relief duct in a sealing manner, a pair of positioning blocks are arranged on the periphery of the pressure relief piston in an equal-angle manner, and the positioning blocks are inserted into the insides of the right-angle notches and are connected with the right-angle notches in a sliding manner.
By adopting the technical scheme, the door plate is provided with the pressure relief pore channel, the pressure relief piston hermetically slides in the pressure relief pore channel, the pore wall of the pressure relief pore channel is provided with a pair of right-angle notches, and the positioning block on the peripheral surface of the pressure relief piston is inserted into the right-angle notch to position the pressure relief piston in the pressure relief pore channel; the vertical section of the right-angle notch extends towards the direction far away from the closed air chamber; when someone who needs to open the fire door when fleing as the scene of proruption conflagration, through rotating the inside pressure release piston in pressure release pore, the locating piece on the pressure release piston outer peripheral face rotates vertical section from the horizontal segment of right angle notch, under the gas inflation thrust of closed air chamber, the pressure release piston removes to the direction of keeping away from closed air chamber, cause the inside pressure of closed air chamber to reduce, the inside pressure piston in each step pore removes to closed air chamber's center, the sealing strip breaks away from the first notch on the door frame, prevent that fire door can open smoothly, make stranded personnel or rescue personnel smoothly through this prevent fire door.
The present invention may be further configured in a preferred embodiment as: the outer peripheral surface of one end of the pressure relief piston, which is close to the closed air chamber, is provided with an annular groove, and a sealing ring is sleeved in the annular groove.
Through adopting above-mentioned technical scheme, install the sealing ring on the pressure release piston, the sealing ring has improved the gas tightness between the outer peripheral face of pressure release piston and the pressure release pore, and then has guaranteed the seal of closed air chamber, and when the conflagration took place, the sealing strip can be continuously stable carry out the shutoff to the gap between door frame and the door plant.
The present invention may be further configured in a preferred embodiment as: and one end of the pressure relief piston, which is far away from the closed air chamber, is provided with a U-shaped hole.
Through adopting above-mentioned technical scheme, when the scene of fire stranded personnel or rescue personnel need open this prevent fire door and flee, can stretch into the U type downthehole with the finger, rotate U type hole, improved the simple operation nature to the pressure release piston, be convenient for stranded personnel or rescue personnel open prevent fire door fast.
The present invention may be further configured in a preferred embodiment as: the sealing strip is inserted into the sinking groove in the second notch at the lower end of the door panel.
Through adopting above-mentioned technical scheme, heavy groove is seted up on the ground of door plant lower extreme, and when the conflagration took place, the sealing strip of the inside second notch of door plant lower extreme can be pegged graft and sink the inslot, has carried out effective shutoff to the gap between door plant and the ground, has avoided smog to spill out from this gap.
The present invention may be further configured in a preferred embodiment as: the door plate is provided with a counter bore with the axis collinear with that of the pressure relief duct, the bottom surface of the counter bore is provided with a pair of threaded holes at the circumference of equal angle, an annular sealing cover is arranged in the counter bore, the annular sealing cover is sleeved at one end, far away from the closed air chamber, of the pressure relief piston, the annular sealing cover is provided with a pair of through holes concentric with the threaded holes, and the annular sealing cover is fixed on the counter bore through screws.
Through adopting above-mentioned technical scheme, set up the counter bore on the door plant, set up threaded hole on the counter bore, install annular closing cap in the counter bore, set up the through-hole on the annular closing cap, the screw passes through the through-hole and the threaded hole threaded connection on the counter bore, and the annular closing cap has avoided impurity such as dust to get into the pressure release pore in, has guaranteed the smooth rotation of pressure release piston in the pressure release pore.
The present invention may be further configured in a preferred embodiment as: and a lubricating grease layer is coated in the step pore canal.
By adopting the technical scheme, the lubricating grease layer is uniformly coated in the step pore channel, the pressure piston moves in the step pore channel in a reciprocating manner due to the pressure change of the closed air chamber, the lubricating grease layer reduces the frictional resistance between the pressure piston and the step pore channel, reduces the abrasion between the pressure piston and the step pore channel, and prolongs the service life of the fireproof door.
The present invention may be further configured in a preferred embodiment as: and the upper edge of the door plate is provided with a door closer, and the base of the door closer is arranged on the door frame.
Through adopting above-mentioned technical scheme, the door plant that the door closer drew under the open mode is close to the door frame, makes the door plant guarantee to be in the closed state under no exogenic action, under the proruption conflagration condition, has avoided stretching of conflagration.
To sum up, the utility model discloses following beneficial effect has:
1. the door plate is mounted on a door frame in a matched manner, a closed air chamber is arranged inside the door plate and is communicated with a step pore passage, a pressure piston is arranged inside the step pore passage, the sealing strip is connected with the pressure piston through a connecting rod, a first notch is formed in the door frame, when a fire disaster occurs, gas in the closed air chamber is heated and expands, the pressure piston pushes the sealing strip to move towards the first notch in the door frame, and the sealing strip seals a gap between the door plate and the door frame, so that smoke in the fire scene is prevented from permeating the gap between the door plate and the door frame, the sealing performance of the fire door is improved, delay is isolated, and the protection of lives and properties of people on one side of;
2. the front side and the back side of the door plate are provided with pressure relief ducts, pressure relief pistons are hermetically and slidably arranged in the pressure relief ducts, the hole walls of the pressure relief ducts are provided with a pair of right-angle notches, and positioning blocks on the peripheral surfaces of the pressure relief pistons are inserted into the right-angle notches to position the pressure relief pistons in the pressure relief ducts; when a person in a scene of a sudden fire needs to open the fireproof door to escape, the pressure relief piston in the pressure relief pore channel is rotated, the positioning block on the peripheral surface of the pressure relief piston rotates to the vertical section from the horizontal section of the right-angle notch, under the expansion thrust of the closed air chamber, the pressure relief piston moves towards the surface of the door panel, so that the pressure intensity in the closed air chamber is reduced, the pressure piston in each step pore channel moves towards the center of the closed air chamber, the sealing strip is separated from the first notch on the door frame, the fireproof door can be smoothly opened, the trapped person can safely escape from the scene of the fire, and the personal safety of the trapped person is protected;
3. sealing blocks are embedded in the first notches at the four corners of the door frame, and when a fire disaster happens, the sealing strips are inserted into the first notches; to the position in door frame four corners, two sealing strips are inserted respectively in inserting relative first notch in this position, cause the four corners of door frame to appear a space of failing the shutoff, and this sealed piece has been filled this space, makes the gap between door frame and the door plant can be totally by the shutoff, has avoided smog to escape from this not shutoff space, has promoted this fire door to the holistic isolated effect of smog, and then has promoted the protection to stranded personnel's the security of the lives and property.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
fig. 2 is a schematic structural view of the door frame of the present embodiment;
FIG. 3 is a schematic structural diagram of a door panel according to the present embodiment;
fig. 4 is a partial sectional view of the door frame of the present embodiment;
FIG. 5 is an enlarged view of portion A of FIG. 4;
FIG. 6 is a schematic view of a partial explosion in the present embodiment;
fig. 7 is an enlarged schematic view of a portion B in fig. 6.
Reference numerals: 1. a door frame; 11. a first notch; 12. a sealing block; 2. a door panel; 21. a handle; 22. a door lock; 23. a door closer; 24. sealing the air chamber; 241. a stepped bore; 242. a pressure piston; 243. a connecting rod; 25. a sealing strip; 251. a second notch; 26. a pressure relief vent; 261. a counter bore; 262. a threaded hole; 263. a right-angled notch; 27. a pressure relief piston; 271. sealing the cover; 272. a screw; 273. a U-shaped hole; 274. positioning blocks; 275. an annular groove; 276. a seal ring; 277. a through hole; 3. loose leaves; 4. a ground surface; 41. and (5) sinking the tank.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the utility model discloses a fire door is prevented to shaping strenghthened type, including door frame 1 and through the supporting door plant 2 of installing on door frame 1 of loose-leaf 3, handle 21 is all installed at the intermediate position of keeping away from one side of loose-leaf 3 at the front and the back of door plant 2, and door lock 22 is installed to one side that loose-leaf 3 was kept away from to door plant 2, and the top of door plant 2 is provided with door closer 23, and door closer 23's base setting is on door frame 1.
Referring to fig. 2, the middle position of the inner circumferential surface of the door frame 1 is provided with first notches 11 which are communicated with each other, a sinking groove 41 is horizontally formed on the ground 4 opposite to the door frame 1, the width of the sinking groove 41 is the same as that of the first notch 11, and the sinking groove 41 is communicated with the first notches 11 at both sides.
Referring to fig. 3, the door panel 2 has second notches 251 formed at the middle positions of the periphery facing the door frame 1, and when the door panel 2 is closed with the door frame 1, the second notches 251 are opposite to the first notches 11. Sealing strips 25 are hermetically and slidably arranged in the second notches 251, and a connecting rod 243 is vertically fixed at the central position of one surface of each sealing strip 25, which is close to the central position of the door panel 2; the inside of door plant 2 has seted up closed air chamber 24, closed air chamber 24 is the enclosure space that is the cuboid, four terminal surfaces perpendicular to the plane of door plant 2 place of closed air chamber 24 have seted up the step pore 241 with second notch 251 and closed air chamber 24 intercommunication, the aperture of one section that step pore 241 communicates closed air chamber 24 is greater than another section, another section and the second notch 251 of step pore 241 intercommunication, the connecting rod 243 is connected with the less one end sliding connection in step pore 241 aperture, the great one end in each step pore 241 aperture all seals to slide has pressure piston 242, it is fixed with connecting rod 243 that one terminal surface that pressure piston 242 kept away from closed air chamber 24 is fixed, the sealed slip of pressure piston 242 in step pore 241 inside promotes sealing strip 25 and slides in second notch 251.
Referring to fig. 4 and 5, the door panel 2 is installed in the door frame 1 in a matching manner, the sealing blocks 12 are embedded in the first notches 11 at the four corners of the door frame 1, the sealing blocks 12 can also be integrally formed with the door frame 1, the size of the sealing blocks 12 in the vertical frame direction of the door frame 1 is the same as the depth of the first notches 11, and the size of the sealing blocks 12 in the horizontal frame direction of the upper end of the door frame 1 is the same as the sum of the depth of the second notches 251 and the size of the gap between the door frame 1 and the door panel 2. The thickness of the sealing strip 25 is such that when the sealing strip 25 is fully inserted into the first notch 11, a part of the sealing strip 25 remains in the second notch 251; when the sealing strips 25 are inserted into the first notches 11, the sealing blocks 12 are abutted against two adjacent sealing strips 25.
Referring to fig. 6 and 7, the pressure relief devices are disposed at the middle positions of the front and back sides of the door panel 2, and each pressure relief device includes a pressure relief duct 26 formed at the front and back sides of the door panel 2 and a pressure relief piston 27 sliding in the pressure relief duct 26 in a sealing manner; the pressure relief duct 26 is communicated with the closed air chamber 24 (see fig. 3), and a set of L-shaped right-angle notches 263 which are symmetrical with respect to the axis center of the pressure relief duct 26 are formed on the inner surface of the hole wall of the pressure relief duct 26. The vertical section of the right-angle notch 263 is parallel to the axis of the pressure relief duct 26, and the vertical section of the right-angle notch extends in the direction far away from the closed air chamber; the horizontal section of the right-angle notch 263 is vertical to the axis of the pressure relief pore passage 26, an annular groove 275 is formed in the outer peripheral surface of one end of the pressure relief piston 27 close to the closed air chamber 24, and a sealing ring 276 is sleeved in the annular groove 275; a pair of positioning blocks 274 are fixed on the outer peripheral surface of the pressure relief piston 27 at equal-angle circumferences, the positioning blocks 274 are inserted into the right-angle notches 263 on the hole wall of the pressure relief duct 26, and the positioning blocks 274 slide along the vertical section of the right-angle notches 263 and rotate around the horizontal section of the right-angle notches 263.
The front side and the back side of the door plate 2 are both provided with counterbores 261 the axes of which are collinear with the axis of the pressure relief duct 26, the bottom surface of the counterbore 261 is provided with a pair of threaded holes 262 at the equiangular circumference, an annular sealing cover 271 is installed in the counterbore 261, the annular sealing cover 271 is sleeved at one end of the pressure relief piston 27 far away from the closed air chamber 24, and the thickness of the annular sealing cover 271 is the same as the hole depth of the counterbore 261; the annular sealing cover 271 is provided with a pair of through holes 277 concentric with the threaded hole 262, the screw 272 is in threaded connection with the threaded hole 262, and the sealing cover 271 is fixed in the counter bore 261; one end of the pressure relief piston 27, which is far away from the annular groove 275, is provided with a U-shaped hole 273, and two inlets of the U-shaped hole 273 are located on the end surface of the pressure relief piston 27.
The implementation principle of the embodiment is as follows:
this fire door is prevented to shaping strenghthened type includes door frame 1 and door plant 2, at first installs door frame 1 on the wall body, fixes a position door frame 1, and door plant 2 is articulated with door frame 1 through loose-leaf 3. Under normal conditions, the pressure of the closed air chamber 24 in the door panel 2 is stable, and each sealing strip 25 is positioned in each second notch 251; when a fire breaks out, the gas inside the closed air chamber 24 is heated to expand, the pressure piston 242 inside the step pore channel 241 is pushed to move towards the direction far away from the closed air chamber 24, the pressure piston 242 is connected with the connecting rod 243, the connecting rod 243 is connected with the sealing strip 25, the sealing strip 25 is pushed to move towards the first notch 11 on the door frame 1, the sealing strip 25 on the bottom surface of the door panel 2 is inserted into the sinking groove 41 formed in the ground 4, and the sealing strip 25 seals gaps between the door panel 2 and the door frame 1 as well as gaps between the door panel 2 and the ground 4.
When an escape person or a rescue person needs to cross the fire door in a fire scene, a finger stretches into the U-shaped hole 273 of the end face of the pressure relief piston 27, the U-shaped hole 273 is rotated to enable the positioning block 274 on the outer peripheral face of the pressure relief piston 27 to rotate to the vertical section along the horizontal section of the right-angle notch 263, the pressure relief piston 27 moves towards one side far away from the closed air chamber 24 under the expansion thrust of the gas in the closed air chamber 24, and then part of the gas in the closed air chamber 24 enters the pressure relief pore channel 26, so that the pressure inside the closed air chamber 24 is reduced, the pressure piston 242 inside the step pore channel 241 moves towards the closed air chamber 24, finally the sealing strip 25 is separated from the first notch 11 on the door frame 1, the sealing strip 25 on the bottom face of the door plate 2 is separated from the sinking groove 41 formed in the.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a fire door is prevented to shaping strenghthened type, characterized by: the door comprises a door frame (1) and a door plate (2) which is matched with the door frame (1) for installation, wherein the inner peripheral surface of the door frame (1) is provided with first notches (11) which are communicated with each other, the periphery of the door plate (2) opposite to the door frame (1) is provided with second notches (251) which are communicated with each other, and the first notches (11) and the second notches (251) are opposite; a closed air chamber (24) is arranged in the door panel (2), and the closed air chambers (24) are respectively provided with a step pore canal (241) for communicating the second notch (251) with the closed air chamber (24); pressure pistons (242) are hermetically and slidably arranged in the step pore canals (241), one end, far away from the closed air chamber (24), of each pressure piston (242) is fixedly provided with a connecting rod (243), the other end of each connecting rod (243) is vertically fixedly provided with a sealing strip (25), and each sealing strip (25) is in inserted fit with the second notch (251); the door plate (2) comprises a front surface and a back surface, and the front surface and the back surface of the door plate (2) are respectively provided with a pressure relief device for controlling the air pressure of the closed air chamber (24); the sealing block (12) is embedded into the first notch (11) at the four corners of the door frame (1).
2. The fire rated door as recited in claim 1, further comprising: the pressure relief device comprises pressure relief ducts (26), each pressure relief duct (26) is communicated with the closed air chamber (24), a pair of L-shaped right-angle notches (263) which are symmetrical about the axis of the pressure relief duct (26) are arranged on the hole wall of the pressure relief duct (26), the vertical section of each right-angle notch (263) is parallel to the axis of the pressure relief duct (26), a pressure relief piston (27) is arranged in the pressure relief duct (26) in a sealing and sliding mode, a pair of positioning blocks (274) are arranged on the periphery of the pressure relief piston (27) in an equiangular mode, and the positioning blocks (274) are inserted into the inside of the right-angle notches (263) and are in sliding connection with the right-angle notches (263).
3. The fire rated door as recited in claim 2, further comprising: an annular groove (275) is formed in the peripheral surface of one end, close to the closed air chamber (24), of the pressure relief piston (27), and a sealing ring (276) is sleeved in the annular groove (275).
4. The fire rated door as recited in claim 2, further comprising: and one end of the pressure relief piston (27) far away from the closed air chamber (24) is provided with a U-shaped hole (273).
5. The fire rated door as recited in claim 1, further comprising: a sinking groove (41) is formed in the ground at the lower end of the door panel (2), and the sealing strip (25) in the second notch (251) at the lower end of the door panel (2) is inserted into the sinking groove (41).
6. The fire rated door as recited in claim 2, further comprising: the anti-explosion pressure relief valve is characterized in that a counter bore (261) with the axis collinear with the axis of the pressure relief duct (26) is formed in the door plate (2), a pair of threaded holes (262) is formed in the circumference of the bottom surface of the counter bore (261) at an equal angle, an annular sealing cover (271) is arranged in the counter bore (261), the annular sealing cover (271) is sleeved at one end, away from the closed air chamber (24), of the pressure relief piston (27), a pair of through holes (277) concentric with the threaded holes (262) is formed in the annular sealing cover (271), and the annular sealing cover (271) is fixed to the counter bore (261) through screws (272).
7. The fire rated door as recited in claim 1, further comprising: the step pore canal (241) is internally coated with a lubricating grease layer.
8. The fire rated door as recited in claim 1, further comprising: and a door closer (23) is arranged on the upper edge of the door panel (2), and the base of the door closer (23) is arranged on the door frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020209659.9U CN211923983U (en) | 2020-02-25 | 2020-02-25 | Forming reinforced fireproof door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020209659.9U CN211923983U (en) | 2020-02-25 | 2020-02-25 | Forming reinforced fireproof door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211923983U true CN211923983U (en) | 2020-11-13 |
Family
ID=73350817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020209659.9U Active CN211923983U (en) | 2020-02-25 | 2020-02-25 | Forming reinforced fireproof door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211923983U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664096A (en) * | 2020-12-24 | 2021-04-16 | 重庆工程职业技术学院 | Financial affairs filing device |
| CN113944415A (en) * | 2021-10-16 | 2022-01-18 | 赵丹丹 | Fire-proof door |
| CN114776192A (en) * | 2022-04-06 | 2022-07-22 | 融创鸿安消防设备(淮安)有限公司 | High-safety fireproof door |
-
2020
- 2020-02-25 CN CN202020209659.9U patent/CN211923983U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664096A (en) * | 2020-12-24 | 2021-04-16 | 重庆工程职业技术学院 | Financial affairs filing device |
| CN113944415A (en) * | 2021-10-16 | 2022-01-18 | 赵丹丹 | Fire-proof door |
| CN114776192A (en) * | 2022-04-06 | 2022-07-22 | 融创鸿安消防设备(淮安)有限公司 | High-safety fireproof door |
| CN114776192B (en) * | 2022-04-06 | 2023-09-15 | 融创鸿安消防设备(淮安)有限公司 | High-safety fireproof door |
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