CN109779058A - A kind of monotrysian type automatic fire prevention plugging device for building hole - Google Patents
A kind of monotrysian type automatic fire prevention plugging device for building hole Download PDFInfo
- Publication number
- CN109779058A CN109779058A CN201910102582.7A CN201910102582A CN109779058A CN 109779058 A CN109779058 A CN 109779058A CN 201910102582 A CN201910102582 A CN 201910102582A CN 109779058 A CN109779058 A CN 109779058A
- Authority
- CN
- China
- Prior art keywords
- module
- structure plate
- modular structure
- plugging
- type automatic
- Prior art date
- 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.)
- Pending
Links
- 230000002265 prevention Effects 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 239000003063 flame retardant Substances 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000004079 fireproofing Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Special Wing (AREA)
Abstract
The invention discloses a kind of monotrysian type automatic fire prevention plugging devices for building hole, supporting mechanism including playing installation supporting role, the top of supporting mechanism is hinged with a modular structure plate by hinge, one piece of plugging module is connected on modular structure plate, an electric pushrod is equipped between supporting mechanism and modular structure plate, rotating electric machine is built-in at the top of plugging module, the motor shaft of rotating electric machine is piercing in plugging module upwards and is connected with fire retardant module, plugging module it is upper, lower both ends are respectively fixed with first stroke switch and second stroke switch, the upper end of plugging module is respectively fixed with third trip switch and fourth stroke switch, electric pushrod and rotating electric machine are connected to the fire alarm automatic control device of peripheral hardware.Open building hole is automatically closed in a short time using fire alarm as start signal by the present invention, plays the role of fire damping, improves safety coefficient, has won the time to improve rescue and fire-fighting efficiency.
Description
Technical field
The present invention relates to fire prevention, back-fire relief technical field, and in particular to a kind of monotrysian type automatic fire prevention closure for building hole
Device.
Background technique
Mainly there are fire resistance rolling shutter door, fire window and fire resisting shield for the plugging device of building fire protection hole currently on the market
Etc., fire protection requirement is generally not achieved in these equipment, and some production process flows and processing are all considerably complicated, and are answering
Used time, installation and use still have some deficits, and effectively can not play the role of fire damping to building hole in a short time, substantially reduce
Fire safety coefficient and efficiency.
In conclusion needing to design a kind of simple, convenient to use, the highly-safe building holes blocking of structure at present
Device.
Summary of the invention
The technical problem to be solved by the present invention is to the existing plugging device for building fire protection hole, structure is complicated, prevents
The poor problem of fiery efficiency.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that providing a kind of monotrysian type for building hole
Automatic fire prevention plugging device, the supporting mechanism including playing installation supporting role, the top of the supporting mechanism is equipped with hinge, described
The top of supporting mechanism is hinged with a modular structure plate by the hinge, is fixedly connected in parallel on the modular structure plate
One piece of plugging module made of fire proofing material, it is telescopic electronic equipped with one between the supporting mechanism and modular structure plate
Push rod, the both ends of the electric pushrod are hingedly connected on the supporting mechanism and modular structure plate, the supporting mechanism, module
Structural slab and electric pushrod form a closed loop configuration, and the modular structure plate is with the flexible around the hinge of the electric pushrod
Forward and reverse rotation is built-in with rotating electric machine at the top of the plugging module, and the motor shaft of the rotating electric machine is piercing in institute upwards
State plugging module and be connected with fire retardant module, the fire retardant module with the forward and reverse rotation of the motor shaft, the plugging module
Upper/lower terminal is respectively fixed with first stroke switch and second stroke switch, the first stroke switch and second stroke switch
Contact be respectively facing when rotation to two extreme angles of the plugging module it is corresponding building hole and building wall side
To arrangement, the upper end of the plugging module is respectively fixed with third trip switch and fourth stroke switch, and the third trip is opened
Pass be respectively facing with the contact that fourth stroke switchs it is corresponding parallel when rotation to two extreme angles of the fire retardant module or
Perpendicular to the direction arrangement of the plugging module, the electric pushrod is connected to the fire report of peripheral hardware with the rotating electric machine
Alert automatic control device.
In the above scheme, it is fixed with lower bracket and upper branch respectively on the outer wall of the supporting mechanism and modular structure plate
Frame, the both ends of the electric pushrod are hingedly connected on the lower bracket and upper bracket.
In the above scheme, there are two be respectively fixedly connected on the supporting mechanism and modular structure plate the hinge tool
Pin-joint piece, two pin-joint pieces are hinged by hinge axis, and the modular structure plate and plugging module are together around described
The forward and reverse rotation of hinge axis.
In the above scheme, the electric pushrod is the interior multistage Telescopic rod structure for being equipped with hydraulic-driven bar.
In the above scheme, the rotation angle range of the modular structure plate is 0~90 °.
In the above scheme, the rotation angle range of the fire retardant module is 0~90 °.
In the above scheme, the Plane of rotation of the fire retardant module is vertical with the Plane of rotation of the modular structure plate.
In the above scheme, the hinge has there are two and is symmetrically arranged respectively.
In the above scheme, several mounting holes are offered on the supporting mechanism.
In the above scheme, the rotating electric machine, motor shaft and fire retardant module are respectively provided with multiple groups, and the third trip is opened
It closes and fourth stroke switch is respectively provided with multiple groups.
Open building hole is automatically closed in a short time, plays using fire alarm as start signal by the present invention
The effect of fire damping improves safety coefficient, has won the time to improve rescue and fire-fighting efficiency.
Detailed description of the invention
Fig. 1 be the present invention be in use state when main view；
Fig. 2 be the present invention be in use state when left view；
Fig. 3 be the present invention be in use state when right view；
Fig. 4 be the present invention be in use state when top view.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings of the specification.
The invention discloses a kind of monotrysian type automatic fire prevention plugging device for building hole, those skilled in the art can be borrowed
Reflect present disclosure, is suitably modified realization of process parameters.It is important to note that all similar substitutions and modifications are to this field
It is it will be apparent that they are considered as being included in the present invention for technical staff, and related personnel can obviously not depart from
Content described herein is modified on the basis of the content of present invention, spirit and scope or appropriate changes and combinations, realizing and
Using the technology of the present invention.
In invention, unless otherwise stated, Science and Technology noun used herein has those skilled in the art
The normally understood meaning of member institute.
As shown in Figures 1 to 4, a kind of monotrysian type automatic fire prevention plugging device for building hole provided by the invention, including
The supporting mechanism 1 of installation supporting role is played, it is irregular L shape that shape is cutd open in the side of supporting mechanism 1, and it is rank that upper end side, which cuts open shape,
Ladder type force structure, offers several mounting holes 16 on supporting mechanism 1, will support machine using mounting hole 16 and bolt when use
Structure 1 is fixed on the surrounding wall of building hole.
The top of supporting mechanism 1 is equipped with hinge 2, and the top of supporting mechanism 1 is hinged with a modular structure plate by hinge 2
3, there are two being respectively fixedly connected in the pin-joint piece on supporting mechanism 1 and modular structure plate 3, two pin-joint pieces pass through the tool of hinge 2
Hinge axis 14 rotates hingedly, in this way, modular structure plate 3 can the forward and reverse rotation of around hinge axis 14 realize rotation to open or
Person closes hole, hinge 2 preferably tool there are two and be symmetrically arranged make stability of rotation and hinged place more stress respectively
Uniformly, flameproof effect is more preferable.
One piece of plugging module 5 made of fire proofing material is fixedly connected on modular structure plate 3 in parallel, plugging module 5 leans on
Adjacent pores hole side is arranged and side Section Design is at the isosceles trapezoid for being conducive to tight back-fire relief, such modular structure plate 3 and closure mould
Block 5 can integrally link, and the rotation angle range of modular structure plate 3 is preferably 0~90 °.
A telescopic electric pushrod 4 is equipped between supporting mechanism 1 and modular structure plate 3, electric pushrod 4 is interior is equipped with
The multistage Telescopic rod structure of hydraulic-driven bar in the prior art.
Lower bracket 13 and upper bracket 6, electric pushrod 4 are fixed on the outer wall of supporting mechanism 1 and modular structure plate 3 respectively
Both ends be hingedly connected on lower bracket 13 and upper bracket 6, thus supporting mechanism 1, modular structure plate 3 and electric pushrod 4 formation
One closed loop configuration, modular structure plate 3, can by this with (forward and reverse) rotation of about 2 flexible around hinge of electric pushrod 4
Become closed loop configuration modification, can achieve the purpose that overturning blocks hole.This distressed structure body can change any installation direction
And any connection structure is used to achieve the purpose that overturn plugging module 5.For example, Fig. 2 state is that electric pushrod 4 is in maximum
Working condition when length, for plugging module 5 in upright state by holes blocking, hole is located at the left side of plugging module 5 at this time, branch
Support mechanism 1 is installed on the wall around the hole of left side, is fallen if the direction shown in arrow along Fig. 2 of modular structure plate 3 rotates, this
When hole it is in the open state, plugging module 5 is in a horizontal state.
The top of plugging module 5 is built-in with rotating electric machine 11, and the motor shaft 15 of rotating electric machine 11 is piercing in closure mould upwards
Block 5 is simultaneously connected with fire retardant module 9, and fire retardant module 9 is made of resistance fire material, and fire retardant module 9 is positive and negative with the driving of motor shaft 15
(clockwise and anticlockwise) form of Xiang Xuanzhuan, overturning can flexibly change, to achieve the purpose that overturn fire retardant module 9, thus
Fire retardant module 9 will build the barrier of hole pyrotechnics with rotation and block or open, and wherein the rotation angle range of fire retardant module 9 is excellent
It is selected as 0~90 °.
It is further preferred that the Plane of rotation of fire retardant module 9 is vertical with the Plane of rotation of modular structure plate 3, in this way in sky
Between upper blocked with two-way rotation barrier preferably isolation effect can be played to hole.
The upper/lower terminal of plugging module 5 is respectively fixed with first stroke switch 7 and second stroke switch 12, first stroke
Switch 7 is respectively facing corresponding building when rotation to two extreme angles of plugging module 5 with the contact of second stroke switch 12
The direction of hole and building wall arrangement, the upper end of plugging module 5 are respectively fixed with third trip switch 8 and fourth stroke switch
10, when the contact of third trip switch 8 and fourth stroke switch 10 is respectively facing rotation to two extreme angles of fire retardant module 9
The corresponding direction parallel or perpendicular to plugging module 5 arranges that electric pushrod 4 is connected to the fire of peripheral hardware with rotating electric machine 11
Calamity alarm automatic control device, automatic alarm intelligent control rotation blocks when achieving the purpose that fire.
Use principle of the invention and the course of work are as follows:
After smog alarm occurs for fire, fire alarm automatic control device starts the elongation of electric pushrod 4 automatically, blocks mould
Block 5 is flipped up therewith by horizontal gradually in upright state (such as Fig. 2 state), while rotating electric machine 11 rotates clockwise makes back-fire relief
Module 9 rotates clockwise 90 °, and fire retardant module 9 touches fourth stroke switch 10 and stops rotating at this time, when electric pushrod 4 is stretched completely
When length reaches maximum, modular structure plate 3 is flipped up 90 °, while can touch first stroke when the compression hole plane of plugging module 5
Switch 7 stops overturning, restart rotating electric machine 11 counterclockwise rotation protruded into the fire retardant module 9 of hole to plugging module 5
(such as Fig. 2 state) touch third trip switch 8, which stops rotating, when parallel completes the closure of hole.
With should fire alarm release after, fire alarm automatic control device starting rotating electric machine 11 rotate clockwise fire retardant module
9 stop rotating when rotating clockwise 90 ° of touch fourth stroke switches 10, then start electric pushrod 4 and shorten, fire retardant module 9 moves
Hole out, when plugging module 5 is downwardly turned over to when being in 90 ° vertical with metope, hole is fully opened, and plugging module 5 is horizontal
State touches second stroke switch 12 and stops rotating, while restarting rotating electric machine 11 and rotating counterclockwise, makes 9 inverse time of fire retardant module
Needle rotate to 5 parallel position of plugging module, touch third trip switch 8 stop rotating, reset completion.Each travel switch can
Using microswitch in the prior art or other switches.
It is further preferred that rotating electric machine 11, motor shaft 15 and fire retardant module 9 are respectively provided with multiple groups, third trip switch 8
Multiple groups are respectively provided with fourth stroke switch 10, each installation site can be designed according to actual needs, multiple to reach closure
The purpose of hole.
The present invention both can start electric pushrod by cigarette induction device, by plugging module and back-fire relief mould when fire occurs
Block send that wherein side compresses hole wall to building hole, while fire retardant module being sent to building hole track, and rotates resistance
It is tight that fiery module will build holes blocking, achieve the purpose that block building hole, promote fire safety coefficient and efficiency, reach and build
Hole fireproof blocking requirement is built, structure is simple, and design cost is lower, and building hole is automatically closed, more simplifies, reach fire prevention
It is required that improving safety coefficient and efficiency.
The present disclosure additionally applies for special building hole, logistic transmission system hole, refuse transport system holes, power industry
And tunnel, tunnel, fire prevention isolated area etc..
Open building hole is automatically closed in a short time, plays using fire alarm as start signal by the present invention
The effect of fire damping improves safety coefficient, has won the time to improve rescue and fire-fighting efficiency.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn that the knots made under the inspiration of the present invention
Structure variation, the technical schemes that are same or similar to the present invention are fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of monotrysian type automatic fire prevention plugging device for building hole, the supporting mechanism including playing installation supporting role is special
Sign is that the top of the supporting mechanism is equipped with hinge, and the top of the supporting mechanism is hinged with a mould by the hinge
Structure plates are fixedly connected with one piece of plugging module made of fire proofing material, the support on the modular structure plate in parallel
A telescopic electric pushrod is equipped between mechanism and modular structure plate, the both ends of the electric pushrod are hingedly connected to described
On supporting mechanism and modular structure plate, the supporting mechanism, modular structure plate and electric pushrod form a closed loop configuration, described
Modular structure plate is built-in at the top of the forward and reverse rotation of the hinge, the plugging module with the flexible of the electric pushrod
Rotating electric machine, the motor shaft of the rotating electric machine are piercing in the plugging module upwards and are connected with fire retardant module, the back-fire relief
For module with the forward and reverse rotation of the motor shaft, the upper/lower terminal of the plugging module is respectively fixed with first stroke switch and the
The contact of two travel switches, first stroke switch and second stroke switch is respectively facing the rotation of the plugging module to two
The direction arrangement of corresponding building hole and building wall when a extreme angles, the upper end of the plugging module is respectively fixed with the
The contact of triple-travel switch and fourth stroke switch, the third trip switch and fourth stroke switch is respectively facing the back-fire relief
The corresponding direction parallel or perpendicular to the plugging module is arranged when the rotation of module to two extreme angles, described electronic to push away
Bar and the rotating electric machine are connected to the fire alarm automatic control device of peripheral hardware.
2. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the support machine
Lower bracket and upper bracket are fixed on the outer wall of structure and modular structure plate respectively, the both ends of the electric pushrod are hingedly connected to
On the lower bracket and upper bracket.
3. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the hinge tool
There are two being respectively fixedly connected in the pin-joint piece on the supporting mechanism and modular structure plate, two pin-joint pieces pass through hinge
Axis rotation is hinged, and the modular structure plate and plugging module are together around the forward and reverse rotation of the hinge axis.
4. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that described electronic to push away
Bar is the interior multistage Telescopic rod structure for being equipped with hydraulic-driven bar.
5. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the module knot
The rotation angle range of structure plate is 0~90 °.
6. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the back-fire relief mould
The rotation angle range of block is 0~90 °.
7. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the back-fire relief mould
The Plane of rotation of block is vertical with the Plane of rotation of the modular structure plate.
8. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the hinge tool
There are two and be symmetrically arranged respectively.
9. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the support machine
Several mounting holes are offered on structure.
10. the monotrysian type automatic fire prevention plugging device of building hole as described in claim 1, which is characterized in that the rotation
Motor, motor shaft and fire retardant module are respectively provided with multiple groups, and the third trip switch and fourth stroke switch are respectively provided with multiple groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910102582.7A CN109779058A (en) | 2019-02-01 | 2019-02-01 | A kind of monotrysian type automatic fire prevention plugging device for building hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910102582.7A CN109779058A (en) | 2019-02-01 | 2019-02-01 | A kind of monotrysian type automatic fire prevention plugging device for building hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109779058A true CN109779058A (en) | 2019-05-21 |
Family
ID=66503083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910102582.7A Pending CN109779058A (en) | 2019-02-01 | 2019-02-01 | A kind of monotrysian type automatic fire prevention plugging device for building hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109779058A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945874A (en) * | 2020-08-25 | 2020-11-17 | 永康普克家具科技有限公司 | Artificial intelligence balcony with safety guarantee |
| CN115370134A (en) * | 2022-09-03 | 2022-11-22 | 锦汇建设集团有限公司 | Fireproof plugging die for electromechanical pipeline |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE847028A (en) * | 1975-10-08 | 1977-01-31 | FIRE PROTECTION DEVICE FOR ELECTRIC LINES. | |
| CN101426986A (en) * | 2006-03-08 | 2009-05-06 | 特拉科洛克北美有限责任公司 | Fire rated wall structure |
| CN103542182A (en) * | 2013-10-18 | 2014-01-29 | 陕西沃尔思消防技术有限公司 | Fire blocking construction process for cable through-wall holes |
| CN104879573A (en) * | 2015-06-17 | 2015-09-02 | 国网山东省电力公司烟台供电公司 | General adjustable cable hole blocking device for transformer substation |
| CN106351347A (en) * | 2016-10-13 | 2017-01-25 | 李景海 | Fireproof plugging device |
| CN209703742U (en) * | 2019-02-01 | 2019-11-29 | 李景海 | A kind of monotrysian type automatic fire prevention plugging device for building hole |
-
2019
- 2019-02-01 CN CN201910102582.7A patent/CN109779058A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE847028A (en) * | 1975-10-08 | 1977-01-31 | FIRE PROTECTION DEVICE FOR ELECTRIC LINES. | |
| CN101426986A (en) * | 2006-03-08 | 2009-05-06 | 特拉科洛克北美有限责任公司 | Fire rated wall structure |
| CN103542182A (en) * | 2013-10-18 | 2014-01-29 | 陕西沃尔思消防技术有限公司 | Fire blocking construction process for cable through-wall holes |
| CN104879573A (en) * | 2015-06-17 | 2015-09-02 | 国网山东省电力公司烟台供电公司 | General adjustable cable hole blocking device for transformer substation |
| CN106351347A (en) * | 2016-10-13 | 2017-01-25 | 李景海 | Fireproof plugging device |
| CN209703742U (en) * | 2019-02-01 | 2019-11-29 | 李景海 | A kind of monotrysian type automatic fire prevention plugging device for building hole |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945874A (en) * | 2020-08-25 | 2020-11-17 | 永康普克家具科技有限公司 | Artificial intelligence balcony with safety guarantee |
| CN111945874B (en) * | 2020-08-25 | 2021-08-03 | 南京溧水高新产业股权投资有限公司 | Artificial intelligence balcony with safety guarantee |
| CN115370134A (en) * | 2022-09-03 | 2022-11-22 | 锦汇建设集团有限公司 | Fireproof plugging die for electromechanical pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102037722B1 (en) | Method and device for barricading a door | |
| CN109779058A (en) | A kind of monotrysian type automatic fire prevention plugging device for building hole | |
| CN209703742U (en) | A kind of monotrysian type automatic fire prevention plugging device for building hole | |
| CN108643743B (en) | Fire control smoke evacuation window system of multiple mode of opening | |
| CN107093859A (en) | A kind of Inflatable cabinet body and box-type substation | |
| CN2464899Y (en) | Multi-function theft-proof door | |
| CN210221486U (en) | Reliability test device of fire prevention blast gate | |
| CN205206512U (en) | Multi -functional fire prevention electromechanical lock | |
| CN209855618U (en) | Split type automatic fireproof plugging device | |
| CN214232475U (en) | Electrical control box with fire alarm function | |
| CN209742117U (en) | Automatic fire prevention plugging device of diplopore formula of building hole | |
| CN101109260A (en) | Flat-opening type safety window and manufacturing method thereof | |
| CN213274685U (en) | Intelligent residual pressure sensor fireproof protection device | |
| CN205605023U (en) | Fire door is prevented to normal close with door closer | |
| CN208122587U (en) | A kind of locking of worm and gear link type and its tunnel protection door or Dong Shimen for tunnel protection door or cavern's door | |
| CN109821162B (en) | Externally-hung escape system for high-rise building | |
| CN215979093U (en) | Anti-collision fireproof door capable of avoiding automatic closing | |
| CN109779057A (en) | A kind of ditrysian type automatic fire prevention plugging device for building hole | |
| CN105788947B (en) | A kind of disconnecting switch on/off switch interlocking mechanism | |
| CN213234865U (en) | Bulletproof security window structure | |
| CN216381093U (en) | Multifunctional civil air defense door | |
| CN214062788U (en) | Smoke-isolating fireproof door | |
| CN218234979U (en) | Fireproof rolling shutter door convenient to installation | |
| CN219587477U (en) | Novel smoke-proof fireproof door | |
| CN205277250U (en) | Burglary -resisting window of taking refuge of fleing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |