WO2024093245A1 - Double-capsule non-stored pressure flat automatic fire extinguishing apparatus - Google Patents

Abstract

A double-capsule non-stored pressure flat automatic fire extinguishing apparatus, comprising a mounting assembly (1), a gas producing assembly (2), a suppressant assembly (3), and a starting assembly. The mounting assembly comprises a clamping pressing cap (11), a housing accommodating cavity (12), a locking nut (13), and a housing end cover (14); the gas producing assembly comprises a gas producing capsule (21), a first hot-melt film (22), a generator cavity (23), and a gas producing agent (24); the suppressant assembly comprises a suppressant capsule (31), a nozzle (32), a second hot-melt film (33), and a suppression medium (34); the gas producing assembly and the suppressant assembly are placed in the housing accommodating cavity of the mounting assembly in a parallel and tightly-attached manner, and the unfolded size of the gas producing capsule and the suppressant capsule is larger than the volume of the accommodating cavity formed by the housing. The fire extinguishing apparatus uses a double-capsule structure to physically isolate a gas generator from the suppression medium, so as to guarantee the cleanness of the suppression medium ejected; the capsules are made of a plastic material to reduce the processing cost and the sealing cost; a squeezing principle is used such that normal working can be implemented in any mounting and placement direction, and the ejection residual is small; and an electric starting mode and a non-electric starting mode are provided according to working environments.

Description

A double-bladder non-pressure storage flat automatic fire extinguishing device Technical Field

The invention relates to the technical field of fire fighting, and in particular to a double-bag type non-pressure storage flat automatic fire extinguishing device.

Background technique

In the field of fire protection, battery boxes, data cabinets, transformer boxes and other equipment often use flat fire extinguishing devices due to space limitations. Currently, the flat fire extinguishing devices on the market have the following shortcomings:

The gas generator of the existing fire extinguishing device is mostly in direct contact with the suppression medium, which is difficult to isolate, resulting in the ejected suppression medium being not clean enough. In addition, the flat fire extinguishing device generally cannot use a circular piston to isolate the suppression medium from the driving gas generated by the gas generator.

Generally, the suppression medium has high requirements on the shell material and sealing performance. Because the suppression medium is generally highly corrosive and volatile, it needs to be in contact with the shell for a long time, which leads to corrosion and leakage during long-term storage, and the reliability is not high. In addition, the production cost is high, which is not suitable for large-scale application scenarios such as battery boxes, data cabinets, and transformer boxes.

Most of the existing flat fire extinguishing devices adopt the siphon principle, with a fixed placement direction and cannot work in any direction. The suppression medium is often difficult to spray cleanly and the spray rate is low.

Existing fire extinguishing devices are stored under pressure under normal conditions and require regular inspection and maintenance during long-term storage, which increases labor costs.

Summary of the invention

In view of the above-mentioned shortcomings, the present invention provides a double-bag non-pressure storage flat automatic fire extinguishing device. Through the double-bag design, the driving gas source and the suppression medium are loaded in different bags respectively. The double-bag structure directly and fundamentally separates the gas generator from the suppression medium, ensuring that the sprayed suppression medium is clean. It can be widely used in battery boxes, data cabinets, transformer boxes and other scenarios.

The technical solution of the present invention is a double-bladder non-pressure storage flat automatic fire extinguishing device, comprising: a mounting assembly, a gas generating assembly, an inhibitor assembly and a starting assembly; the mounting assembly comprises a housing cavity for accommodating The gas producing component and the inhibitor component are contained and fixed; the gas producing component includes a gas producing bag, and the gas producing component generates high-pressure gas in the gas producing bag to squeeze the inhibitor component; the inhibitor component includes an inhibitor bag, and the inhibitor in the inhibitor bag is pressurized and ejected under the action of the high-pressure gas generated by the gas producing component to play a fire extinguishing role; the starting component is connected to the gas producing component, and is used to start the gas producing component to generate high-pressure gas.

Furthermore, the gas-producing component also includes a first hot-melt film, a generator cavity and a gas-producing agent; the gas-producing agent is placed in the generator cavity; the generator cavity is fixed in the gas-producing bag, one end of which is connected to the starting component and the other end is bonded with the first hot-melt film.

Furthermore, the gas generating agent is a composite solid propellant grain, the composite solid propellant has a burning rate of 1 mm/s to 4 mm/s, a cross-sectional size of 4 mm×4 mm, a length of 45-55 mm, and a gas production of 100 ml/g to 400 ml/g; the formula composition includes a binder, a curing agent, an oxidant, a cooling agent and a stabilizer; the binder is a combination of one or more of polyethylene glycol, polyethylene adipate and polycaprolactone, and the content is 10% by mass. %～40%; the curing agent is toluene diisocyanate and/or isophorone diisocyanate, and the content is 0.5%～5% by mass percentage; the oxidant is ammonium perchlorate and/or ammonium nitrate, and the content is 20%～60% by mass percentage; the cooling agent is azodicarbonamide and/or dihydroxyglyoxime, and the content is 20%～60% by mass percentage; the stabilizer is 2-nitrodiphenylamine and/or 4-nitroaniline, and the content is 0.5%～5% by mass percentage.

Furthermore, the above-mentioned inhibitor assembly also includes a nozzle, a second hot-melt film and an inhibitory medium; the inhibitory medium is loaded in the inhibitor capsule; the nozzle is arranged at the connection part between the inhibitor capsule and the shell cavity, and is used for filling and spraying the inhibitory medium; the second hot-melt film is used to seal the nozzle.

Furthermore, the above-mentioned suppression medium includes one or both of perfluorohexanone and CFA fire extinguishing agent.

Furthermore, the above-mentioned installation component also includes a clamping cap (11), a locking nut, and an outer shell end cover; the clamping cap (11) is used to fix the gas production component; the locking nut is used to fix the inhibitor component; the fixed gas production component and the inhibitor component are fixed in parallel at both ends of the same horizontal height in the outer shell cavity; the outer shell end cover is used to seal the hole on the outer shell cavity, and the hole is used to install and fix the components set in the outer shell cavity.

Furthermore, the gas generating bag and the inhibitor bag are three-layer or four-layer laminated films, and the total thickness of the laminated films is 0.1mm to 0.3mm; when it is a three-layer laminated film, the film layers are a combination of PE, PA and PA from the inside to the outside; when it is a four-layer laminated film, the film layers are a combination of PE, Al, PA and PET from the inside to the outside; the material of the shell cavity is aluminum alloy 6061, and the pressure range is 1.2MPa-1.5MPa; the gas generating bag and The unfolded size of the inhibitor capsule under non-stretching conditions is larger than the size of the shell cavity. When the gas generating agent burns and decomposes to generate high-pressure gas, the gas generating capsule expands and squeezes the inhibitor capsule. During the squeezing process, the shell cavity bears the pressure to ensure that the gas generating capsule is not burst.

Furthermore, the generator cavity and the nozzle are made of one or more of polyethylene, polypropylene, modified flame-retardant polyethylene, and modified flame-retardant polypropylene as raw materials and processed by injection molding; the bonding of the generator cavity and the air-generating bag, and the bonding of the nozzle and the inhibitor bag are both formed by high-speed hot pressing process; the first hot-melt film and the hot-melt film are made of PE aluminum foil with a thickness of 0.01mm~0.06mm and an opening pressure of 0.1MPa~0.9MPa.

Further, the above-mentioned starting assembly is a non-electric starting assembly, including a thermistor wire, a tightening cap and a rubber tube;

The thermistor wire passes through the rubber tube and is tightened by a tightening cap, and is finally connected to the gas production component by a threaded connection.

As a replacement for the above-mentioned non-starting component, the starting component of the present invention is an electric starting component, including an electric squib, a signal line and a wiring plug; one end of the signal line is inserted into the electric squib through a pin, and the other end is connected to the wiring plug; the electric squib is connected to the gas production component, and the wiring plug is connected to the power supply.

The working principle of the device of the present invention is: double bags are arranged in the outer shell cavity, the gas-producing bag is loaded with gas-producing agent, and the inhibitor bag is loaded with inhibitor, both of which are accommodated in the outer shell cavity in an incompletely expanded size. When a fire occurs in the environment, the component is started to work, so that the gas-producing agent in the gas-producing component is ignited to generate high-pressure gas. Under the action of the high-pressure gas, the first hot-melt membrane in the gas-producing component ruptures, and the gas is ejected from the generator cavity. The gas-producing bag expands instantly, and the expanded gas-producing bag violently squeezes the inhibitor bag of the inhibition component (at the same time, the two air bags only deform due to pressure under the pressure of the outer shell cavity and will not have the risk of rupture). After being pressurized, the inhibition medium breaks through the second hot-melt membrane and is ejected from the nozzle, thereby achieving the suppression of the environmental fire.

Compared with the existing technologies and products, the double-bladder type non-pressure storage flat automatic fire extinguishing device provided by the present invention can achieve the following technical effects:

1. The present invention adopts a double-bag structure, one bag is used to generate a high-pressure driving gas source, and the other bag is used to fill the inhibition medium. The double-bag structure fundamentally separates the gas generator from the inhibition medium, isolates the gas-generating agent from the shell cavity, and isolates the inhibition medium from the shell cavity. On the one hand, it ensures that the injected inhibition medium is clean, and on the other hand, it ensures that the shell cavity is not corroded, thereby extending the service life of the shell cavity.

2. The two capsules of the present invention are both made of composite films pressed from different plastic films, which can directly contact most of the corrosive inhibitory media on the market, reducing the requirements for the corrosion resistance of the shell cavity. When the two bladders are used, they can be reused, which reduces the overall manufacturing cost. The bladders themselves have good sealing properties, which further reduces the requirements for the sealing performance of the shell cavity (the sealing process of hard materials such as metals is complicated, and the service life of maintaining sealing performance is limited). The shell cavity only plays a supporting role and auxiliary pressure-bearing role in the structure during work. When the two bladders are naturally not stretched, their unfolded size is larger than the volume of the cavity formed by the shell, thereby reducing the requirements for the pressure resistance of the bladder and further reducing costs.

3. The present invention uses gas generating agent to generate high-pressure gas, and the gas generating component squeezes the inhibitor component to inhibit the medium from breaking through the second hot-melt film and spraying out from the nozzle. Most existing products on the market use the siphon principle, which can only be installed in a single direction and has large spray residue. The present invention uses the extrusion principle, and under the action of high pressure, it can work normally in any direction and has small spray residue.

4. The present invention adopts the composite solid propellant in aerospace solid power as the gas source device. Under normal circumstances, it is stored without pressure, and can be stored in a liquefied state at normal pressure, thereby ensuring the reliability of long-term storage of the fire extinguishing device.

5. The present invention can provide two specifications, electric start and non-electric start, according to the working environment and engineering requirements. Compared with existing products, the present invention can adapt to more working environments and has higher universality and reliability.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a cross-sectional schematic diagram of a non-electrically activated version of a double-bladder non-pressure storage flat automatic fire extinguishing device of the present invention;

FIG2 is a schematic diagram of the installation assembly of the double-bladder type non-pressure storage flat automatic fire extinguishing device of the present invention;

3 is a cross-sectional schematic diagram of a gas production assembly of a double-bag type non-pressure storage flat automatic fire extinguishing device of the present invention;

4 is a schematic cross-sectional view of an inhibitor assembly of a double-bladder type non-pressure storage flat automatic fire extinguishing device according to the present invention;

5 is a schematic cross-sectional view of a starter assembly of a non-electric starter version of a double-bladder type non-pressure storage flat automatic fire extinguishing device of the present invention;

6 is a schematic diagram of the appearance structure of the electric start version of the double-bladder type non-pressure storage flat automatic fire extinguishing device of the present invention;

7 is a schematic diagram of the appearance structure of the starting assembly of the electric start version of the double-bag non-pressure storage flat automatic fire extinguishing device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

Example 1

A double-bag non-pressure storage flat automatic fire extinguishing device, whose structure is shown in Figure 1. For the convenience of description, the double-bag non-pressure storage flat automatic fire extinguishing device is referred to as a fire extinguishing device. The fire extinguishing device is started in a non-electric way and includes an installation component 1, a gas production component 2, an inhibitor component 3 and a non-electric starting component 4.

As shown in Figure 2, the installation component 1 includes a clamping cap 11, a shell cavity 12, a locking nut 13, and a shell end cover 14; after the gas producing component 2 and the inhibitor component 3 are assembled, they are placed side by side and tightly in the shell cavity, and the gas producing component 2 is fixed by the clamping cap 11; the inhibitor component 3 is fixed by the locking nut 13.

The outer dimensions of the housing cavity 12 of the mounting assembly 1 are 120 mm×80 mm×16 mm. The clamping cap 11 is made of plastic and is bonded to the gas generating assembly 2 by PE glue to play a role of limiting and fixing; the locking nut 13 fixes the inhibitor assembly by threading.

As shown in Figure 3, the gas-generating component 2 includes a gas-generating bag 21, a first hot-melt film sheet 22, a generator cavity 23, and a gas-generating agent 24; the gas-generating agent 24 is placed in the generator cavity 23, and the hot-melt film sheet 22 is bonded to one end of the generator cavity 23 by an electromagnetic induction sealing machine; and then the generator cavity 23 and the gas-generating bag 21 are bonded and fixed as a whole to the gas-generating bag 21 by a hot press.

The gas generating agent 24 is a composite solid propellant with a burning rate of 2 mm/s, a cross-sectional size of 4 mm×4 mm, and a length of about 50 mm. The formula includes an adhesive, a curing agent, an oxidant, a cooling agent, and a stabilizer; the adhesive is a combination of one or more of polyethylene glycol, polyethylene adipate, and polycaprolactone, with a content of 10% to 40% by mass; the curing agent is toluene diisocyanate and/or isophorone diisocyanate, with a content of 0.5% to 5% by mass; the oxidant is ammonium perchlorate and/or ammonium nitrate, with a content of 20% to 60% by mass; the cooling agent is azodicarbonamide and/or dihydroxyglyoxime, with a content of 20% to 60% by mass; the stabilizer is 2-nitrodiphenylamine and/or 4-nitroaniline, with a content of 0.5% to 5% by mass.

As shown in FIG4 , the inhibitor assembly 3 includes an inhibitor capsule 31, a nozzle 32, a second hot-melt film 33, and an inhibitor medium 34. After the nozzle 32 is bonded to the inhibitor capsule 31, a quantitative inhibitor medium 34 is poured in, and then the hot-melt film 33 and the nozzle 32 are bonded together and sealed by an electromagnetic induction sealing machine.

The inhibiting medium 34 is 110 ml of perfluorohexanone; the opening pressure of the first hot-melt film and the second hot-melt film is about 0.4 MPa.

As shown in FIG5 , the non-electric starting assembly 4 includes a thermal wire 41, a tightening cap 42, and a rubber tube 43. The thermal wire 41 passes through the rubber tube 43 and is tightened by the tightening cap 42, and is finally connected to the generator by a threaded connection. The cavity 23 is connected to ignite the gas generating agent 24.

The thermal line 41 has a diameter of about 3 mm and a length of about 500 mm.

When a fire occurs in the environment, the thermistor 41 burns, and after burning to the generator cavity 23, it ignites the gas-generating agent 24 to generate high-pressure gas. The hot-melt film 22 ruptures under the action of the high-pressure gas, and the gas-generating bag 21 expands instantly, violently squeezing the inhibitor bag 31. The inhibitor medium 34 is pressurized and breaks through the hot-melt film 33 and is ejected from the nozzle 32, thereby suppressing the environmental fire.

Example 2

A double-bag non-pressure storage flat automatic fire extinguishing device, whose structure is shown in Figure 6, is different from the non-electric starting method of Example 1 in that the starting component is different. The starting component of this embodiment is an electric starting component 5. The fire extinguishing device includes an installation component 1, a gas producing component 2, an inhibitor component 3 and an electric starting component 5.

As shown in Figure 7, it is a schematic diagram of the appearance and structure of the starting component of the electric start version of the fire extinguishing device, including an electric squib 51, a signal line 52, and a wiring plug 53; when a fire occurs in the environment, an electrical signal is generated and transmitted to the electric squib 51 through the signal line 52, igniting the gas generating agent 24 to generate high-pressure gas, and the first hot-melt film 22 ruptures under the action of the high-pressure gas, and the gas generating bag 21 expands instantly, violently squeezing the inhibitor bag 31, and the inhibitor medium 34 is compressed and breaks through the hot-melt film 33 and is ejected from the nozzle 32 to suppress the environmental fire.

The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection requirements of the present invention.

Claims (10)

A double-bladder type non-pressure storage flat automatic fire extinguishing device, characterized in that it comprises: a mounting assembly (1), a gas generating assembly (2), an inhibitor assembly (3) and a starting assembly; The installation assembly (1) comprises a housing cavity (12) for accommodating and fixing the gas production assembly (2) and the inhibitor assembly (3); The gas generating component (2) comprises a gas generating bag (21), and the gas generating component (2) generates high-pressure gas in the gas generating bag (21) to squeeze the inhibitor component (3); The inhibitor component (3) comprises an inhibitor capsule (31), and the inhibitor in the inhibitor capsule (31) is ejected under pressure under the action of high-pressure gas generated by the gas production component (2), thereby exerting a fire extinguishing effect; The starting component is connected to the gas producing component (2) and is used to start the gas producing component (2) to generate high-pressure gas. The double-bladder type non-pressure storage flat automatic fire extinguishing device according to claim 1 is characterized in that: The gas generating component (2) further comprises a first hot-melt film (22), a generator cavity (23) and a gas generating agent (24); The gas generating agent (24) is placed in the generator cavity (23); The generator cavity (23) is fixed in the gas generating bag (21), one end of which is connected to the starting component, and the other end of which is bonded with the first hot-melt film (22). The double-bladder type non-pressure storage flat automatic fire extinguishing device as claimed in claim 2 is characterized in that: The gas generating agent (24) is a composite solid propellant charge, the composite solid propellant has a burning rate of 1 mm/s to 4 mm/s, a cross-sectional size of 4 mm×4 mm, a length of 45-55 mm, and a gas generating capacity of 100 ml/g to 400 ml/g; the formula composition includes an adhesive, a curing agent, an oxidant, a cooling agent and a stabilizer; The adhesive is a combination of one or more of polyethylene glycol, polyethylene adipate and polycaprolactone, with a content of 10% to 40% by mass; the curing agent is toluene diisocyanate and/or isophorone diisocyanate, with a content of 0.5% to 5% by mass; the oxidant is ammonium perchlorate and/or ammonium nitrate, with a content of 20% to 60% by mass; the cooling agent is azodicarbonamide and/or dihydroxyglyoxime, with a content of 20% to 60% by mass; the stabilizer is 2-nitrodiphenylamine and/or 4-nitroaniline, with a content of 0.5% to 5% by mass. The double-bladder type non-pressure storage flat automatic fire extinguishing device according to claim 1 is characterized in that: The inhibitor assembly (3) further comprises a nozzle (32), a second hot-melt film (33) and an inhibitor medium (34); The inhibitory medium (34) is loaded in the inhibitor capsule (31); The nozzle (32) is arranged at the connection portion between the inhibitor capsule (31) and the housing cavity (12) and is used for filling and spraying the inhibitor medium (34); The second hot-melt film (33) is used to seal the nozzle (32). The double-bladder type non-pressure storage flat automatic fire extinguishing device as claimed in claim 4 is characterized in that: The suppression medium (34) includes one or both of perfluorohexanone and CFA fire extinguishing agent. The double-bladder type non-pressure storage flat automatic fire extinguishing device as claimed in claim 4 is characterized in that: The installation assembly (1) further comprises a clamping nut (11), a locking nut (13), and a housing end cover (14); The clamping cap (11) is used to fix the gas production component (2); The locking nut (13) is used to fix the inhibitor assembly (3); The gas production component (2) and the inhibitor component (3) are fixed in parallel at two ends of the same horizontal height in the housing cavity (12); The shell end cover (14) is used to seal the hole on the shell cavity (12), and the hole is used to install and fix the components arranged in the shell cavity (12). The double-bladder type non-pressure storage flat automatic fire extinguishing device according to claim 1 is characterized in that: The gas-generating bag (21) and the inhibitor bag (31) are three-layer or four-layer laminated films, and the total thickness of the laminated films is 0.1 mm to 0.3 mm; when it is a three-layer laminated film, the film layers are a combination of PE, PA and PA from the inside to the outside; when it is a four-layer laminated film, the film layers are a combination of PE, Al, PA and PET from the inside to the outside; The shell cavity (12) is made of aluminum alloy 6061, with a pressure range of 1.2 MPa-1.5 MPa; The unfolded sizes of the gas-generating bag (21) and the inhibitor bag (31) under non-stretching conditions are both larger than the size of the shell cavity (12). When the gas-generating agent (24) burns and decomposes to generate high-pressure gas, the gas-generating bag (21) expands and squeezes the inhibitor bag (31). During the squeezing process, the shell cavity (12) bears the pressure to ensure that the gas-generating bag (21) is not burst. The double-bladder type non-pressure storage flat automatic fire extinguishing device according to claim 1 is characterized in that: The generator cavity (23) and the nozzle (32) are made of one or more of polyethylene, polypropylene, modified flame-retardant polyethylene, and modified flame-retardant polypropylene as raw materials and are processed by an injection molding process; The bonding of the generator cavity (23) and the gas generating bag (21), and the bonding of the nozzle (32) and the inhibitor bag (31) are both formed by a high-speed hot pressing process; The first hot-melt membrane (22) and the hot-melt membrane (33) are made of PE aluminum foil, with a thickness of 0.01 mm to 0.06 mm and an opening pressure of 0.1 MPa to 0.9 MPa. The double-bladder type non-pressure storage flat automatic fire extinguishing device according to claim 1 is characterized in that: The starting assembly is a non-electric starting assembly (4), comprising a thermal wire (41), a tightening cap (42) and a rubber tube (43); The thermal wire (41) passes through the rubber tube (43) and is tightened by the tightening cap (42), and is finally connected to the gas production component (2) by means of a threaded connection. The double-bladder type non-pressure storage flat automatic fire extinguishing device according to claim 1 is characterized in that: The starting assembly is an electric starting assembly (5), comprising an electric squib (51), a signal line (52) and a wiring plug (53); One end of the signal line (52) is inserted into the electric squib (51) through a pin, and the other end is connected to a wiring plug (53); The electric squib (51) is connected to the gas production assembly (2), and the wiring plug (53) is connected to the power supply.