CN109364396A - A kind of airline extinguishment component - Google Patents
A kind of airline extinguishment component Download PDFInfo
- Publication number
- CN109364396A CN109364396A CN201811372298.3A CN201811372298A CN109364396A CN 109364396 A CN109364396 A CN 109364396A CN 201811372298 A CN201811372298 A CN 201811372298A CN 109364396 A CN109364396 A CN 109364396A
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- CN
- China
- Prior art keywords
- slot
- temperature
- sensing element
- fixed
- support
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
- A62C3/08—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in aircraft
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
- A62C37/14—Releasing means, e.g. electrically released heat-sensitive with frangible vessels
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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 present invention provides a kind of airline extinguishment components, including valve body and splash box, and temperature-sensing element is equipped between splash box and valve body, and body base is equipped with ejiction opening, and the bottom of ejiction opening is equipped with cock body；Splash box includes annular seating and annular slab, annular seating interpolation is equipped with support component, support component includes baffle, cylinder and fixed block, it is threadedly coupled in cylinder insertion annular seating and with annular seating, the top surface of cylinder is equipped with the first slot, and the bottom of the first slot is equipped with the second slot, cricoid support base is equipped in first slot, one end of temperature-sensing element is supported with cock body, the other end and support base support, and electrothermal tube is equipped in the second slot, the top of electrothermal tube and the bottom of temperature-sensing element support；Its structure novel, convenient for disassembly and assembly, good seal performance, installation or replacement operation convenient for temperature-sensing element；Using automatic and artificial dual opening ways, improves fire-extinguishing apparatus when safety accident occurs and open success rate, and do not influence the normal sprinkling of extinguishing chemical.
Description
Technical field
The present invention relates to fire extinguishing component fields, more particularly to a kind of airline extinguishment component.
Background technique
In the big aircraft circles of civil aviaton, regardless of aircraft is that awing or on the ground, fire is all most for aircraft
Dangerous one of threat；So usually installing fixed fire detector on certain positions of the power device of aircraft and body
And fire-extinguishing apparatus, to protect possible " flame range "；But the spray head of the fire-extinguishing apparatus of some fixed installations is adopted mostly
It just will start after reaching the damaged temperature of temperature-sensing element with the opening ways of temperature induction type, only ambient temperature；Or certain uses
The opening ways of impact type when needing to think starting, open impact structure i.e. in the side of temperature-sensing element setting impact structure
Can, but this kind of mode can influence the sprinkling of extinguishing chemical to a certain extent, reduce the area coverage of extinguishing chemical；And existing valve
It is inconvenient that the component of body portion dismounts, and is more troublesome to the installation or replacement operation of temperature-sensing element.
Summary of the invention
In order to overcome the drawbacks of the prior art, technical problem to be solved by the present invention lies in propose a kind of airline extinguishment group
Part, structure novel is convenient for disassembly and assembly, good seal performance, installation or replacement operation convenient for temperature-sensing element；Using automatic and artificial
Dual opening ways, improve fire-extinguishing apparatus when safety accident occurs and open success rate, and do not influence the normal sprinkling of extinguishing chemical,
Guarantee the normal area coverage of extinguishing chemical.
For this purpose, the following technical solution is employed by the present invention:
The present invention provides a kind of airline extinguishment components, including the splash box below valve body and the valve body, the splashing
Disk is fixedly connected with the body base by more upright bars, and temperature-sensing element is equipped between the splash box and the valve body,
The body base center is equipped with the ejiction opening being connected to fire extinguisher tank, and the bottom of the ejiction opening is equipped with cock body, the cock body
Head including being inserted in the ejiction opening and the pedestal outside the ejiction opening, the base diameter are greater than the ejection
The bottom surface of the diameter of mouth, the pedestal is equipped with card hole, and the card hole extends in the head；The splash box includes ring
Shape seat and the annular slab for being fixed at the annular seating bottom sidewall, the annular seating interpolation are equipped with support component, the branch
Support component includes baffle and the cylinder for being fixed at the baffle top surface and the fixed block for being fixed at the baffle bottom surface, institute
It states cylinder to be inserted into the annular seating and be threadedly coupled with the annular seating, the diameter of the baffle is greater than the annular seating
The top surface of internal diameter and the baffle and the bottom surface of the annular slab support, and the top surface of the cylinder is to having the first slot, institute
The bottom for stating the first slot is less than the diameter of first slot, institute to the second slot, the diameter of second slot is had
It states and is equipped with cricoid support base in the first slot, the outer wall of the support base and the first slot inner wall are pasted and fixed, described
The internal diameter of support base is greater than the diameter of second slot, the temperature-sensing element be set to the support component and the cock body it
Between, and one end of the temperature-sensing element is supported with the card hole, the other end is supported with the support base, in second slot
Equipped with electrothermal tube, the top of the electrothermal tube and the bottom of the temperature-sensing element are supported.
In preferably technical solution of the invention, the cock body bottom is equipped with metal cap, and the metal cap is close to the bottom
The bottom wall of seat and card hole inner wall setting, and the metal cap is adhesively fixed with the cock body.
In preferably technical solution of the invention, the ejiction opening bottom interior wall is fixed with baffle ring, the top on the head
Wall is fixed with the flexible glue body of tubulose, and the flexible glue body includes tube body and the flange that is fixed at the top of the tube body, the pipe
The inner wall of external wall and the baffle ring supports, the top of the flange towards the separate tube body axis direction bending.
In preferably technical solution of the invention, the head top surface is described recessed to the lower concave part for having spherical crown shape
Portion is located in the flexible glue body.
In preferably technical solution of the invention, the electrothermal tube is miniature single-end electrothermal tube.
In preferably technical solution of the invention, the fixed block is equipped with threading hole, the threading hole and described second
Slot connection, and the fixed block is in hexa-prism.
In preferably technical solution of the invention, the temperature-sensing element is temperature sensing glass ball.
In preferably technical solution of the invention, the quantity of the upright bar is 3~4, and a plurality of upright bar is around institute
State the axis of splash box circumferentially array distribution.
In preferably technical solution of the invention, it is equipped with the channel that extinguishing chemical passes through in the valve body, connects on the channel
Logical there are two branches, and a road is equipped with high pressure relief device, another road equipped with pressure gauge.
The invention has the benefit that
A kind of airline extinguishment component provided by the invention, structure novel, good seal performance, to consolidating for temperature-sensing element
Surely between the support component supported and splash box use thread connecting mode, it is convenient for disassembly and assembly, convenient for temperature-sensing element installation or replace
Change operation；And temperature-sensing element can voluntarily rupture when external temperature reaches break temperature, realize unlatching, and need artificial unlatching
When extinguishing action, electrothermal tube can be started, artificial changes external temperature reaches the break temperature of temperature-sensing element, to realize artificially
Extinguishing action is opened, dual opening ways can be achieved in the cooperation of the two, improve fire-extinguishing apparatus when safety accident occurs and open successfully
Rate, and the setting of electrothermal tube does not influence the normal sprinkling of extinguishing chemical, guarantees the normal area coverage of extinguishing chemical.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the airline extinguishment component provided in specific embodiments of the present invention；
Fig. 2 is the enlarged drawing of part A in Fig. 1；
Fig. 3 is the structural schematic diagram of the cock body provided in specific embodiments of the present invention；
Fig. 4 is the structural schematic diagram of the support component provided in specific embodiments of the present invention.
In figure:
100, valve body；110, ejiction opening；120, baffle ring；200, splash box；210, annular seating；220, annular slab；300, it stands
Bar；400, temperature-sensing element；500, cock body；510, head；520, pedestal；530, card hole；540, metal cap；550, flexible glue body；
551, tube body；552, flange；560, lower concave part；600, support component；610, baffle；620, cylinder；630, the first slot；640,
Second slot；650, support base；660, electrothermal tube；670, fixed block；671, threading hole；700, high pressure relief device；800, it presses
Power table.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1 and Figure 2, a kind of airline extinguishment component, including valve body 100 are disclosed in specific embodiments of the present invention
With the splash box 200 of 100 lower section of valve body, the splash box 200 is consolidated with 100 bottom of valve body by more upright bars 300
Fixed connection, and temperature-sensing element 400 is equipped between the splash box 200 and the valve body 100,100 bottom centre of valve body sets
There is the ejiction opening 110 being connected to fire extinguisher tank, the bottom of the ejiction opening 110 is equipped with cock body 500, as shown in figure 3, the cock body
500 include being inserted in the head 510 in the ejiction opening 110 and the pedestal 520 outside the ejiction opening 110, the pedestal
520 diameters are greater than the diameter of the ejiction opening 110, and the bottom surface of the pedestal 520 is equipped with card hole 530, and the card hole 530 is prolonged
It extends in the head 510；The splash box 200 is including annular seating 210 and is fixed at 210 bottom sidewall of annular seating
Annular slab 220,210 interpolation of annular seating are equipped with support component 600, as shown in figure 4, the support component 600 includes gear
It plate 610 and is fixed at the cylinder 620 of 610 top surface of baffle and is fixed at the fixed block 670 of 610 bottom surface of baffle,
The cylinder 620 is inserted into the annular seating 210 and is threadedly coupled with the annular seating 210, and the diameter of the baffle 610 is big
In the internal diameter of the annular seating 210 and the top surface of the baffle 610 and the bottom surface of the annular slab 220 support, the cylinder
620 top surface is to having the first slot 630, and the bottom of first slot 630 is to having the second slot 640, and described
The diameter of two slots 640 is less than the diameter of first slot 630, is equipped with cricoid support base in first slot 630
650, the outer wall of the support base 650 and 630 inner wall of the first slot are pasted and are fixed, and the internal diameter of the support base 650 is greater than
The diameter of second slot 640, the temperature-sensing element 400 are set between the support component 600 and the cock body 500, and
One end of the temperature-sensing element 400 is supported with the card hole 530, the other end is supported with the support base 650, second slot
Electrothermal tube 660 is equipped in hole 640, the top of the electrothermal tube 660 and the bottom of the temperature-sensing element 400 support；The head
510 and the pedestal 520 be made of polytetrafluoroethylene (PTFE), the support base 650 is made of rubber.
A kind of above-mentioned airline extinguishment component, structure novel, good seal performance, the progress to the temperature-sensing element 400
Thread connecting mode is used between the support component 600 and the splash box 200 of fixed support, it is convenient for disassembly and assembly, it is convenient for institute
State installation or the replacement operation of temperature-sensing element 400；And the temperature-sensing element 400 can be voluntarily when external temperature reaches break temperature
When rupturing, realize and open, and needing artificial unlatching extinguishing action, the electrothermal tube 660, artificial change outside temperature can be started
Degree reaches the break temperature of the temperature-sensing element 400, to realize artificial unlatching extinguishing action, the cooperation of the two can be achieved dual
Opening ways improve fire-extinguishing apparatus when safety accident occurs and open success rate, and the setting of the electrothermal tube 660 does not influence to put out a fire
The normal sprinkling of agent guarantees the normal area coverage of extinguishing chemical.
Further, as shown in figure 3,500 bottom of the cock body is equipped with metal cap 540, the metal cap 540 is close to described
The bottom wall of pedestal 520 and the setting of 530 inner wall of the card hole, and the metal cap 540 is adhesively fixed with the cock body 500；Institute
The design for stating metal cap 540 can reinforce the overall structural strength of the cock body 500, while be convenient for the temperature-sensing element 400 and institute
The connection for stating cock body 500 avoids 500 bottom of cock body that excessive deformation occurs under the active force of the temperature-sensing element 400.
Further, as shown in Fig. 2, 110 bottom interior wall of the ejiction opening is fixed with baffle ring 120, the head 510
Roof is fixed with the flexible glue body 550 of tubulose, and the flexible glue body 550 includes tube body 551 and is fixed at the top of the tube body 551
Flange 552, the inner wall of 551 outer wall of tube body and the baffle ring 120 supports, and the top of the flange 552 is towards far from described
The direction bending of the axis of tube body 551；The design of the baffle ring 120 can limit the insertion distance of the cock body 500, avoid described
Cock body 500 is excessively inserted into the ejiction opening 110, is acted convenient for subsequent extinguishing chemical sprinkling；And the design of the flange 552,
It is the upper wall surface for being close to the baffle ring 120 under the action of internal pressure, integrally-built leakproofness can be further strengthened；And
Extinguishing chemical spray during, the flange 552 the gravity of the cock body 500 itself and injection punching press under the action of deformation,
And be detached from from the baffle ring 120, to not influence normal extinguishing chemical sprinkling movement.
Further, 510 top surface of head is located at institute to the lower concave part 560 for having spherical crown shape, the lower concave part 560
It states in flexible glue body 550；In extinguishing chemical high speed ejection, the lower concave part 560 is configured as force part, center by
Power can guarantee the cock body 500 from described in the case where spraying punching press convenient for being detached from the flexible glue body 550 from the baffle ring 120
Ejiction opening 110 is detached from.
Further, the electrothermal tube 660 is miniature single-end electrothermal tube, and miniature single-end electrothermal tube is commercially available and directly makes
With heating temperature is greater than the damaged temperature of the temperature-sensing element 400.
Further, as shown in figure 4, the fixed block 670 is equipped with threading hole 671, the threading hole 671 and described the
The connection of two slots 640, and the fixed block 670 is in hexa-prism；The electrothermal tube 660 is convenient in the design of the threading hole 671
Conducting wire installation；And the fixed block 670 can be solid convenient for carrying out rotating when installing the support component 300 in hexa-prism
It is fixed, it can be set according to national standard nut large scale, ready-made tool can be used to carry out the installation of the support component 300 and tear open
It unloads.
Further, the quantity of the upright bar 300 is 3~4, and a plurality of upright bar 300 is around the splash box 200
Axis circumferentially array distribution；The design of a plurality of upright bar 300 can reinforce the splash box 200 and the valve body 100 it
Between connection, and 300 quantity of the upright bar control between 3~4, sprinkling of the upright bar 300 to extinguishing chemical can be reduced
It is formed and is stopped, it is ensured that the sprinkling area coverage of extinguishing chemical.
Further, the channel that extinguishing chemical passes through is equipped in the valve body 100, branch there are two connections on the channel,
One road is equipped with high pressure relief device 700, another road is equipped with pressure gauge 800；The temperature-sensing element 400 is temperature-sensitive glass
Ball；The high pressure relief device 700, the pressure gauge 900 and temperature sensing glass ball are the common components of fire extinguisher valve body, three
Cooperation is to constitute complete fire extinguisher valve body, and wherein temperature sensing glass ball has the plurality of specifications such as 57 DEG C, 68 DEG C, 79 DEG C, 93 DEG C,
It is commercially available.
The working principle of the invention:
When being assembled to the temperature-sensing element 400, the head 510 of the cock body 500 is filled in first described
In ejiction opening 110, the pedestal 520 is made to support 200 roof of splash box；Then by the support component 600 and the ring
Shape seat 210 is threadedly coupled and partial insertion described in annular seating 210；Then 400 bottom of temperature-sensing element is put in institute
It states in support base 650, and then rotates the fixed block 670, the support component 600 rises, and makes the temperature-sensing element 400
Top and the cock body 500 support fixed；During wherein the ejiction opening 110 is filled on the head 510, need by
The flange 552, which is squeezed and deformed, simultaneously passes through the baffle ring 120, and the flange 552 is in internal pressure in the actual use process
Under the action of will be close to the upper wall surface of the baffle ring 120；
And the present invention is in actual use, the temperature-sensing element 400 is influenced by the temperature of external environment, if external hair
It lights a fire feelings, and when temperature reaches the break temperature of the temperature-sensing element 400, the temperature-sensing element 400 ruptures, the cock body 500
It loses and supports and be detached under the high-pressure injection of fire-suppression bottle internal firefighting agent the ejiction opening 110, extinguishing chemical sprays and through institute
It states splash box 200 to be spread, to realize fire extinguishing；If fire behavior occurs for outside, when needing timely artificially to start extinguishing action,
The electrothermal tube 660 is opened to generate heat, when temperature being made to be rapidly achieved the break temperature of the temperature-sensing element 400, the temperature-sensing element
400 ruptures, the cock body 500, which loses, to be supported and is detached from the ejiction opening under the high-pressure injection of fire-suppression bottle internal firefighting agent
110, extinguishing chemical is sprayed and is spread through the splash box 200, to realize fire extinguishing.
The present invention is described with reference to the preferred embodiments, and those skilled in the art know, of the invention not departing from
In the case where spirit and scope, various changes or equivalence replacement can be carried out to these features and embodiment.The present invention is not by this
The limitation of specific embodiment disclosed in place, other embodiments fallen into claims hereof belong to protection of the present invention
Range.
Claims (9)
1. a kind of airline extinguishment component, including the splash box (200) below valve body (100) and the valve body (100), the splashing
Disk (200) is fixedly connected with the valve body (100) bottom by more upright bars (300), and the splash box (200) and the valve
Temperature-sensing element (400) are equipped between body (100), it is characterised in that:
Valve body (100) bottom centre is equipped with the ejiction opening (110) being connected to fire extinguisher tank, the bottom of the ejiction opening (110)
Portion is equipped with cock body (500), and the cock body (500) includes the head (510) being inserted in the ejiction opening (110) and is located at described
The pedestal (520) of ejiction opening (110) outside, pedestal (520) diameter are greater than the diameter of the ejiction opening (110), the pedestal
(520) bottom surface is equipped with card hole (530), and the card hole (530) extends in the head (510)；The splash box
It (200) include annular seating (210) and the annular slab (220) for being fixed at the annular seating (210) bottom sidewall, the annular seating
(210) interpolation is equipped with support component (600), and the support component (600) includes baffle (610) and is fixed at the baffle
(610) cylinder (620) of top surface and it is fixed at the fixed block (670) of the baffle (610) bottom surface, the cylinder (620) is inserted
Enter in the annular seating (210) and be threadedly coupled with the annular seating (210), the diameter of the baffle (610) is greater than the ring
The internal diameter of shape seat (210) and the top surface of the baffle (610) and the bottom surface of the annular slab (220) support, the cylinder
(620) top surface is to having the first slot (630), and the bottom of first slot (630) is to having the second slot
(640), the diameter of second slot (640) is less than the diameter of first slot (630), and first slot (630) is interior
Equipped with cricoid support base (650), the outer wall of the support base (650) and the first slot (630) inner wall are pasted and are fixed, institute
The internal diameter for stating support base (650) is greater than the diameter of second slot (640), and the temperature-sensing element (400) is set to the support
Between component (600) and the cock body (500), and one end of the temperature-sensing element (400) and the card hole (530) support,
The other end is supported with the support base (650), is equipped with electrothermal tube (660) in second slot (640), the electrothermal tube
(660) bottom at top and the temperature-sensing element (400) supports.
2. a kind of airline extinguishment component according to claim 1, it is characterised in that:
Cock body (500) bottom is equipped with metal cap (540), the metal cap (540) be close to the pedestal (520) bottom wall and
Card hole (530) the inner wall setting, and the metal cap (540) is adhesively fixed with the cock body (500).
3. a kind of airline extinguishment component according to claim 1, it is characterised in that:
Ejiction opening (110) bottom interior wall is fixed with baffle ring (120), and the roof of the head (510) is fixed with tubulose
Flexible glue body (550), the flexible glue body (550) includes tube body (551) and the flange that is fixed at the top of the tube body (551)
(552), the inner wall of tube body (551) outer wall and the baffle ring (120) supports, and the top of the flange (552) is towards far from institute
State the direction bending of the axis of tube body (551).
4. a kind of airline extinguishment component according to claim 3, it is characterised in that:
Head (510) top surface is located at the flexible glue to the lower concave part (560) for having spherical crown shape, the lower concave part (560)
In body (550).
5. a kind of airline extinguishment component according to claim 1, it is characterised in that:
The electrothermal tube (660) is miniature single-end electrothermal tube.
6. a kind of airline extinguishment component according to claim 1, it is characterised in that:
The fixed block (670) is equipped with threading hole (671), and the threading hole (671) is connected to second slot (640),
And the fixed block (670) is in hexa-prism.
7. a kind of airline extinguishment component according to claim 1, it is characterised in that:
The temperature-sensing element (400) is temperature sensing glass ball.
8. a kind of airline extinguishment component according to claim 1, it is characterised in that:
The quantity of the upright bar (300) is 3~4, and a plurality of upright bar (300) is around the axis of the splash box (200)
Circumferentially array distribution.
9. according to a kind of airline extinguishment component described in claim 1, it is characterised in that:
The channel that extinguishing chemical passes through is equipped in the valve body (100), there are two branches for connection on the channel, and a road is equipped with
High pressure relief device (700), another road are equipped with pressure gauge (800).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811372298.3A CN109364396B (en) | 2018-11-17 | 2018-11-17 | Aviation subassembly of putting out a fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811372298.3A CN109364396B (en) | 2018-11-17 | 2018-11-17 | Aviation subassembly of putting out a fire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109364396A true CN109364396A (en) | 2019-02-22 |
| CN109364396B CN109364396B (en) | 2020-12-29 |
Family
ID=65389773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811372298.3A Active CN109364396B (en) | 2018-11-17 | 2018-11-17 | Aviation subassembly of putting out a fire |
Country Status (1)
| Country | Link |
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| CN (1) | CN109364396B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112206454A (en) * | 2020-09-29 | 2021-01-12 | 菲莱技术(广州)有限公司 | Fire extinguisher starting drive, fire extinguisher |
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| CN207782701U (en) * | 2017-12-30 | 2018-08-28 | 广东萤火虫智慧能源技术有限公司 | A kind of solar panels connection structure and the solar-energy awning comprising it |
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| US5494113A (en) * | 1994-02-01 | 1996-02-27 | Central Sprinkler Corporation | Sprinklers with shape-memory alloy actuators |
| CN101596343A (en) * | 2009-07-10 | 2009-12-09 | 青岛中阳消防科技有限公司 | Suspended type ultrafine dry powder extinguishing installation |
| CN202355755U (en) * | 2011-12-01 | 2012-08-01 | 浙江福兴消防设备有限公司 | Multifunctional automatic starter for suspension type fire-fighting extinguisher apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112206454A (en) * | 2020-09-29 | 2021-01-12 | 菲莱技术(广州)有限公司 | Fire extinguisher starting drive, fire extinguisher |
| CN112206454B (en) * | 2020-09-29 | 2024-04-19 | 菲莱技术(广州)有限公司 | Fire extinguisher starting device and fire extinguisher |
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| Publication number | Publication date |
|---|---|
| CN109364396B (en) | 2020-12-29 |
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Denomination of invention: An aviation fire extinguishing component Effective date of registration: 20220622 Granted publication date: 20201229 Pledgee: Bank of China Limited Jingdezhen Branch Pledgor: Jingdezhen Xinghang Technology Development Co.,Ltd. Registration number: Y2022980008504 |