CN112972933A - Ceramic fiber non-woven fireproof cloth - Google Patents
Ceramic fiber non-woven fireproof cloth Download PDFInfo
- Publication number
- CN112972933A CN112972933A CN202110227188.3A CN202110227188A CN112972933A CN 112972933 A CN112972933 A CN 112972933A CN 202110227188 A CN202110227188 A CN 202110227188A CN 112972933 A CN112972933 A CN 112972933A
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- Prior art keywords
- fixedly connected
- worm
- reinforcing rib
- inner cavity
- woven
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/04—Removing or cutting-off the supply of inflammable material
-
- 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
- A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/42—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with mechanical connection between sensor and actuator, e.g. rods, levers
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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 fireproof cloth, and discloses ceramic fiber non-woven fireproof cloth which comprises a shell, wherein a reinforcing rib is fixedly connected to the middle of an inner cavity of the shell, a worm is inserted in the middle of the reinforcing rib in a sliding mode, a fireproof plate is fixedly connected to the right end of the worm, symmetrical abutting plates are fixedly connected to the inner cavity of the reinforcing rib on the surface of the worm, abutting columns are fixedly connected to the upper side and the lower side of the worm on the left wall of the inner cavity of the reinforcing rib, and an adjusting frame sleeved on the worm is rotatably connected to the left portion of the reinforcing rib. This ceramic fiber non-woven fire prevention cloth strikes the PLASTIC LAMINATED through the hot gas flow for the worm drives the adjustment frame and rotates, utilizes the adjustment disk that the haulage cable drove both sides again to deflect, then can make the gasbag ring absorb toxic gas and purify, and make the multi-direction motion of pressure boost head spray the dry powder in step, thereby the effectual toxic gas's that leads to when having avoided the condition of a fire to take place because of the burning diffusion, promoted the efficiency of putting out a fire to the fire source.
Description
Technical Field
The invention relates to the technical field of fireproof cloth, in particular to ceramic fiber non-woven fireproof cloth.
Background
The fire prevention cloth is also the surface fabric that can effectively prevent the burning promptly for fire-retardant cloth, at present, general fire prevention cloth device in the use, only can carry out simple oxygen separation to the burning things which may cause as a fire disaster to take place the diffusion of the toxic gas that leads to because of the burning when can't avoid the condition of a fire to take place, and to some special inflammable substance's burning, because it can't cover the burning things which may cause completely, or can't reach isolated oxygen's effect fast, then can lead to the problem of the inefficiency of putting out the burning things which may cause the source of a fire.
Aiming at the defects of the prior art, the invention provides the ceramic fiber non-woven fireproof cloth which has the advantages of effectively avoiding the diffusion of toxic gas caused by combustion when a fire occurs, effectively improving the extinguishing efficiency of a fire source, and solving the problems that the diffusion of the toxic gas caused by combustion when a fire occurs and the extinguishing efficiency of the fire source are low when a common fireproof cloth device is used.
Disclosure of Invention
In order to effectively avoid the diffusion of toxic gas caused by combustion when a fire occurs and effectively improve the extinguishing efficiency of a fire source, the invention provides the following technical scheme: a ceramic fiber non-woven fireproof cloth comprises a shell, wherein a reinforcing rib is fixedly connected to the middle of an inner cavity of the shell, a worm is inserted in the middle of the reinforcing rib in a sliding mode, a fireproof plate is fixedly connected to the right end of the worm, symmetrical abutting plates are fixedly connected to the inner cavity of the reinforcing rib on the surface of the worm, abutting columns are fixedly connected to the upper side and the lower side of the worm on the left wall of the inner cavity of the reinforcing rib, an adjusting frame sleeved on the worm is connected to the left portion of the reinforcing rib in a rotating mode, a positioning frame is fixedly connected to the upper side and the lower side of the reinforcing rib on the left portion of the inner cavity of the shell in a rotating mode, an adjusting disc is connected to the surface of the positioning frame in a rotating mode, a traction cable extending to the adjusting disc is uniformly wound on the periphery of the adjusting frame, a movable strip is connected to the inner cavity of, fixedly connected with gasbag ring between link mechanism and the locating piece, the equal fixedly connected with atmospheric pressure seat in upper and lower both sides of the inner chamber right part strengthening rib of casing, the one end fixedly connected with atmospheric pressure pad that the atmospheric pressure seat is close to the strengthening rib, the inner chamber middle part sliding connection of atmospheric pressure seat has the elastic column that extends to on the atmospheric pressure pad, swing joint has the pull rod between elastic column and the adjustment disk, the right side wall chamber of casing rotates and is connected with the protection dish, the right-hand member fixedly connected with of locating piece extends to the regulation pole on the protection dish, the right side wall swing joint of casing has the rotation frame, the inner chamber that rotates the frame rotates and is connected with the pressure boost head, the left end fixedly connected with of pressure boost head extends to the crank on the.
Preferably, the size of the worm is matched with that of the adjusting frame, and the worm and the adjusting frame are in meshed connection.
Preferably, the inner cavity fixedly connected with of locating frame respectively with the bearing of adjusting disk and activity strip adaptation to when making the adjusting disk rotate, can drive the corresponding slip of activity strip along the locating frame.
Preferably, a torsion spring assembly is fixedly connected between the adjusting plate and the positioning frame, so that the whole equipment is ensured to reset after the operation is finished.
Preferably, the inner cavity side wall of the air bag ring is fixedly connected with an activated carbon bag, so that toxic gas generated by burning of a fire source can be purified when the device is operated.
Preferably, the inner cavity of the sealed space formed by the air pressure seat and the air pressure cushion is filled with fire extinguishing dry powder, so that when the air pressure cushion is pulled and contracted by the elastic column, the corresponding fire source can be subjected to fire extinguishing operation.
Preferably, the surface of the protection disc is provided with an arc-shaped groove corresponding to the adjusting rod, so that the protection disc can deflect correspondingly when the adjusting rod is driven to move in the vertical direction.
Advantageous effects
Compared with the prior art, the invention provides a ceramic fiber non-woven fireproof cloth, which has the following beneficial effects:
1. this ceramic fibre non-woven fire prevention cloth, there is the fire source of one side contact of PLASTIC LAMINATED with equipment when using, the ceramic fibre non-woven fabrics of equipment self can automatic isolated oxygen reach the purpose of putting out a fire when the intensity of a fire is less, and when the intensity of a fire is great, corresponding hot gas flow motion is very rapid, the air current is through corresponding fire prevention cover, then can cause the impact to the PLASTIC LAMINATED, make the PLASTIC LAMINATED drive the worm and remove, then make the adjustment frame receive around the haulage rope with the pulling adjustment disk deflection, the movable strip of the both sides that correspond drives the locating piece dorsad removal, cooperation link mechanism deformation, the gasbag ring then the expansion is inhaled for the burden to the external appearance, and then discharge again after the toxic gas suction purification of fire district, thereby the effectual diffusion of toxic gas that leads to because of burning when having.
2. This ceramic fiber non-woven fire prevention cloth, when deflecting through the adjustment disk, it can pass through the pull rod in step and drive the elastic column and remove, then pulling atmospheric pressure pad shrink, extrude the dry powder of putting out a fire in the atmospheric pressure seat inner chamber to the blowout of pressure boost head department, meanwhile because the locating piece removes backward also can drive the adjustment rod simultaneously and make the protection disk deflect, cooperation crank and the limiting displacement who rotates the frame, the pressure boost head is then driven to the comparatively serious region in source of a fire, continuously spray the dry powder of putting out a fire to the position of difference, thereby the effectual efficiency of putting out a fire to the source of a fire that has promoted.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a front sectional view of a connecting portion of a balloon ring or the like according to the present invention;
FIG. 3 is a front sectional view of a connecting portion of reinforcing bars and the like according to the present invention;
FIG. 4 is a front sectional view of a connection portion of a protection disk or the like of the present invention.
In the figure: 1. a housing; 2. reinforcing ribs; 3. a worm; 4. a fire-proof plate; 5. a butt joint plate; 6. a butting post; 7. an adjusting frame; 8. a positioning frame; 9. an adjusting disk; 10. a traction cable; 11. a movable bar; 12. positioning blocks; 13. a link mechanism; 14. a balloon ring; 15. a pneumatic seat; 16. a pneumatic cushion; 17. an elastic column; 18. a pull rod; 19. a protection disk; 20. adjusting a rod; 21. rotating the frame; 22. a pressurizing head; 23. a crank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a ceramic fiber non-woven fireproof cloth comprises a shell 1, a reinforcing rib 2 is fixedly connected to the middle of an inner cavity of the shell 1, a worm 3 is inserted in the middle of the reinforcing rib 2 in a sliding manner, the size of the worm 3 is matched with that of an adjusting frame 7 and is meshed and connected with the same, a fireproof plate 4 is fixedly connected to the right end of the worm 3, a fireproof cover sleeved on the fireproof plate 4 is fixedly connected to the right wall of the shell 1 and plays a role in gathering hot air flow, the fireproof plate 4 is arc-shaped and hollow and light, when the ceramic fiber non-woven cloth is used, one side of the equipment with the fireproof plate 4 is in contact with a fire source, when the fire is small, the ceramic fiber non-woven cloth of the equipment can automatically isolate oxygen to achieve the purpose of extinguishing fire, when the fire is large, the corresponding hot air flow moves rapidly, the air flow passes through the corresponding fireproof cover to impact the fireproof plate 4, so, then make the adjustment frame 7 receive around pull cable 10 in order to stimulate adjusting disk 9 and deflect, the activity strip 11 of the both sides that correspond drives locating piece 12 and moves dorsad, cooperation link mechanism 13 deformation, gasbag ring 14 then expands and outwards appears as the burden and inhales, and then discharges after inhaling the toxic gas of purifying the fire district to the effectual diffusion of toxic gas that leads to because of the burning when having avoided the condition of a fire to take place.
The inner cavity of the surface reinforcing rib 2 of the worm 3 is fixedly connected with symmetrical butt plates 5, the upper side and the lower side of the worm 3 on the left wall of the inner cavity of the reinforcing rib 2 are fixedly connected with butt columns 6, the left part of the reinforcing rib 2 is rotatably connected with an adjusting frame 7 sleeved on the worm 3, the upper side and the lower side of the left reinforcing rib 2 on the inner cavity of the shell 1 are fixedly connected with positioning frames 8, the inner cavity of each positioning frame 8 is fixedly connected with bearings respectively matched with an adjusting disc 9 and a movable bar 11, so that the movable bar 11 can be driven to correspondingly slide along the positioning frame 8 when the adjusting disc 9 rotates, the surface of each positioning frame 8 is rotatably connected with the adjusting disc 9, and a torsional spring assembly is fixedly connected between the adjusting disc 9 and the positioning frame 8, thereby the whole equipment is ensured to reset after the operation is finished, when the adjusting disc 9 deflects, the elastic columns 17 can be synchronously driven to move through the pull rods 18, the dry powder of putting out a fire in 15 inner chambers of atmospheric pressure seat is extruded to pressure boost head 22 department blowout, meanwhile because locating piece 12 moves backward also can drive adjusting lever 20 simultaneously and make protection plate 19 deflect, cooperates the limiting displacement of crank 23 and rotation frame 21, pressure boost head 22 is then driven to the comparatively serious region of fire source, continuously sprays the dry powder of putting out a fire to the position of difference to the effectual suppression efficiency of having promoted the fire source.
The periphery of the adjusting frame 7 is uniformly wound with a traction cable 10 extending to the adjusting disc 9, the inner cavity of the positioning frame 8 is connected with a movable strip 11 in a sliding manner, one side of the movable strip 11 far away from the reinforcing rib 2 is fixedly connected with a positioning block 12, a link mechanism 13 is movably connected between the positioning block 12 and the adjusting disc 9, an air bag ring 14 is fixedly connected between the link mechanism 13 and the positioning block 12, and the inner cavity side wall of the air bag ring 14 is fixedly connected with an activated carbon bag, so that toxic gas generated by combustion of a fire source can be purified when the device is operated, the upper side and the lower side of the right reinforcing rib 2 of the inner cavity of the shell 1 are both fixedly connected with air pressure seats 15, the inner cavity of a sealed space formed by the air pressure seats 15 and the air pressure cushions 16 is filled with fire extinguishing dry powder, so that the air pressure cushions 16 can extinguish the corresponding fire source when being pulled and contracted by the elastic columns 17, and in addition, the air pressure seats, the inner parts of the two guide pipes are fixedly provided with one-way valves along the corresponding direction, the inner part of the guide pipe connected with a pressurizing head 22 is fixedly connected with a flow limiting net to limit the amount of the fire extinguishing dry powder output by a single time, one end of an air pressure seat 15 close to the reinforcing rib 2 is fixedly connected with an air pressure pad 16, the middle part of the inner cavity of the air pressure seat 15 is connected with an elastic column 17 extending to the air pressure pad 16 in a sliding way, a pull rod 18 is movably connected between the elastic column 17 and an adjusting disc 9, the right side wall cavity of the shell 1 is rotatably connected with a protective disc 19, the surface of the protective disc 19 is provided with an arc-shaped groove corresponding to the adjusting rod 20, so that the protective disc 19 can deflect correspondingly when the adjusting rod 20 is driven to move in the vertical direction, the right end of the positioning block 12 is fixedly connected with the adjusting rod 20 extending to the protective disc 19, the right side wall of the shell 1 is, the left end of the booster head 22 is fixedly connected with a crank 23 extending to the protection disc 19.
The working principle is as follows: the ceramic fiber non-woven fireproof cloth contacts one side of a fireproof plate 4 with a fire source when in use, when the fire is small, the ceramic fiber non-woven cloth of the equipment can automatically isolate oxygen to achieve the purpose of fire extinguishment, when the fire is large, the corresponding hot air flow moves rapidly, the air flow passes through the corresponding fireproof cover and then impacts the fireproof plate 4 which is arc-shaped and large in surface area, because the fireproof plate 4 is large in area under the action of the air flow and is hollow and light, the worm 3 can be driven to move under the action of the hot air flow, the abutting plate 5 on the surface of the corresponding worm 3 can impact the abutting column 6, because the abutting column 6 can also exert a counter-acting force on the abutting plate 5 subsequently after being pressed by the abutting plate 5, the worm 3 can reset, the adjusting frame 7 influenced by the effect can firstly receive and wind the traction rope 10 to pull the adjusting disc 9 to deflect, because the inner cavity of the positioning frame 8 is fixedly connected with bearings respectively matched with the adjusting disc 9 and the movable strip 11, when the adjusting disc 9 deflects, the movable strip 11 can be driven to correspondingly slide along the positioning frame 8, namely the movable strips 11 on the two corresponding sides drive the positioning blocks 12 to move back and forth, the connecting rod mechanism 13 is matched to deform, the air bag ring 14 expands to show negative suction, the side wall of the inner cavity of the air bag ring 14 is fixedly connected with an activated carbon bag, toxic gas in a fire area is sucked and purified, and gas is discharged when the worm 3 is reset, so that the diffusion of the toxic gas caused by combustion when fire occurs is effectively avoided, when the adjusting disc 9 deflects, the adjusting disc synchronously drives the elastic column 17 to move through the pull rod 18, then the air pressure pad 16 is pulled to contract, and fire extinguishing dry powder in the inner cavity of the air pressure seat 15 is extruded to the pressurizing head 22 through the guide pipe connected to the pressurizing head 22 to be sprayed, during the period, because the flow limiting net is fixedly connected in the corresponding output conduit, the fire extinguishing dry powder can be output for multiple times under the condition that the filling amount in the sealed space formed by the air bag ring 14 and the air pressure seat 15 is sufficient, meanwhile, the adjusting rod 20 can be synchronously driven to move due to the backward movement of the positioning block 12, under the action of an arc-shaped groove which is formed in the surface of the protective disc 19 and is matched with the adjusting rod 20, the protective disc 19 is driven to deflect within a certain angle, the protective disc 19 drives the crank 23 to synchronously deflect, and the pressurizing head 22 is rotatably connected to the inner cavity of the rotating frame 21 and is rotatably connected between the rotating frame 21 and the shell 1, so that the pressurizing head 22 can be driven to spray the fire extinguishing dry powder to the serious area of a fire source continuously and repeatedly to different directions, and the fire extinguishing efficiency of the fire source is effectively improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A ceramic fiber non-woven flameproof fabric, including casing (1), its characterized in that: the inner cavity of the shell (1) is fixedly connected with a reinforcing rib (2), the middle of the reinforcing rib (2) is slidably inserted with a worm (3), the right end of the worm (3) is fixedly connected with a fireproof plate (4), the inner cavity of the surface reinforcing rib (2) of the worm (3) is fixedly connected with symmetrical butt plates (5), the upper side and the lower side of the inner cavity left wall worm (3) of the reinforcing rib (2) are fixedly connected with butt columns (6), the left part of the reinforcing rib (2) is rotatably connected with an adjusting frame (7) sleeved on the worm (3), the upper side and the lower side of the inner cavity left reinforcing rib (2) of the shell (1) are fixedly connected with positioning frames (8), the surface of each positioning frame (8) is rotatably connected with an adjusting disc (9), and the periphery of each adjusting frame (7) is uniformly wound with a traction cable (10) extending to the adjusting disc (9), the inner chamber sliding connection of locating frame (8) has movable strip (11), keep away from one side fixedly connected with locating piece (12) of strengthening rib (2) on movable strip (11), swing joint has link mechanism (13) between locating piece (12) and adjustment disk (9), fixedly connected with gasbag ring (14) between link mechanism (13) and locating piece (12), the upper and lower both sides of the inner chamber right part strengthening rib (2) of casing (1) all fixedly connected with pneumatic seat (15), one end fixedly connected with pneumatic cushion (16) that pneumatic seat (15) are close to strengthening rib (2), the inner chamber middle part sliding connection of pneumatic seat (15) has elastic column (17) that extends to pneumatic cushion (16), swing joint has pull rod (18) between elastic column (17) and adjustment disk (9), the right side wall chamber of casing (1) rotates and is connected with protection disk (19), the right-hand member fixedly connected with of locating piece (12) extends to regulation pole (20) on protection dish (19), the right wall swing joint of casing (1) has rotation frame (21), the inner chamber of rotating frame (21) rotates and is connected with pressure boost head (22), the left end fixedly connected with of pressure boost head (22) extends to crank (23) on protection dish (19).
2. The ceramic fiber non-woven flameproof fabric of claim 1, wherein: the size of the worm (3) is matched with that of the adjusting frame (7).
3. The ceramic fiber non-woven flameproof fabric of claim 1, wherein: and the inner cavity of the positioning frame (8) is fixedly connected with bearings which are respectively matched with the adjusting disc (9) and the movable strip (11).
4. The ceramic fiber non-woven flameproof fabric of claim 1, wherein: and a torsion spring assembly is fixedly connected between the adjusting disc (9) and the positioning frame (8).
5. The ceramic fiber non-woven flameproof fabric of claim 1, wherein: the side wall of the inner cavity of the air sac ring (14) is fixedly connected with an activated carbon bag.
6. The ceramic fiber non-woven flameproof fabric of claim 1, wherein: the inner cavity of a sealed space formed by the air pressure seat (15) and the air pressure cushion (16) is filled with fire extinguishing dry powder.
7. The ceramic fiber non-woven flameproof fabric of claim 1, wherein: the surface of the protection disc (19) is provided with an arc-shaped groove corresponding to the adjusting rod (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110227188.3A CN112972933A (en) | 2021-03-01 | 2021-03-01 | Ceramic fiber non-woven fireproof cloth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110227188.3A CN112972933A (en) | 2021-03-01 | 2021-03-01 | Ceramic fiber non-woven fireproof cloth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112972933A true CN112972933A (en) | 2021-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110227188.3A Withdrawn CN112972933A (en) | 2021-03-01 | 2021-03-01 | Ceramic fiber non-woven fireproof cloth |
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| Country | Link |
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| CN (1) | CN112972933A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003103776A1 (en) * | 2002-06-05 | 2003-12-18 | Celestin Smircic | Fire-fighting carpet |
| CN210138393U (en) * | 2019-05-30 | 2020-03-13 | 山东民安安防科技有限公司 | Blanket-shaped fire extinguishing ball |
| CN111441815A (en) * | 2020-04-16 | 2020-07-24 | 吴文旭 | Automatic watering type fire extinguishing device in coal mine |
| CN211357553U (en) * | 2019-12-13 | 2020-08-28 | 江西五联消防科技有限公司 | Detection device of aerosol fire extinguishing system |
| CN112136803A (en) * | 2020-09-27 | 2020-12-29 | 胡诗余 | Energy-saving environment-friendly bird repelling device capable of being used for long time |
| CN112263795A (en) * | 2020-10-16 | 2021-01-26 | 喻贞烈 | Automatic smoke suction device for pushing door of fire-fighting fireproof door |
| CN112337256A (en) * | 2020-11-10 | 2021-02-09 | 刘衍桄 | Automatic spray dust removal device along with wind power in building foundation pit |
-
2021
- 2021-03-01 CN CN202110227188.3A patent/CN112972933A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003103776A1 (en) * | 2002-06-05 | 2003-12-18 | Celestin Smircic | Fire-fighting carpet |
| CN210138393U (en) * | 2019-05-30 | 2020-03-13 | 山东民安安防科技有限公司 | Blanket-shaped fire extinguishing ball |
| CN211357553U (en) * | 2019-12-13 | 2020-08-28 | 江西五联消防科技有限公司 | Detection device of aerosol fire extinguishing system |
| CN111441815A (en) * | 2020-04-16 | 2020-07-24 | 吴文旭 | Automatic watering type fire extinguishing device in coal mine |
| CN112136803A (en) * | 2020-09-27 | 2020-12-29 | 胡诗余 | Energy-saving environment-friendly bird repelling device capable of being used for long time |
| CN112263795A (en) * | 2020-10-16 | 2021-01-26 | 喻贞烈 | Automatic smoke suction device for pushing door of fire-fighting fireproof door |
| CN112337256A (en) * | 2020-11-10 | 2021-02-09 | 刘衍桄 | Automatic spray dust removal device along with wind power in building foundation pit |
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Application publication date: 20210618 |