KR20220166396A - Fire extinguishing product to prevent fire caused by transformer insulating oil - Google Patents

Abstract

The present invention relates to a fire extinguishing product for preventing fire caused by transformer insulating oil, and more specifically, to a fire extinguishing product for preventing fire caused by transformer insulating oil, which is attached to the inside of an oil-immersed transformer lid, and is characterized by extinguishing fire through spraying a fire extinguishing agent contained in a microcapsule of the fire extinguishing product when fire occurs due to insulating oil.

Description

Extinguishing product for preventing fire caused by transformer insulating oil {FIRE EXTINGUISHING PRODUCT TO PREVENT FIRE CAUSED BY TRANSFORMER INSULATING OIL}

The present invention relates to a fire extinguishing product for preventing fire caused by transformer insulating oil, and more specifically, is attached to the inside of an oil-immersed transformer lid and is included in the fire extinguishing microcapsule of the fire extinguishing product when a fire occurs due to insulating oil. It is characterized by extinguishing a fire by spraying a fire extinguishing agent.

Encapsulation is a physio-chemical process that uses a liquid, solid or gas as a core and forms a shell that surrounds the outside of the core. prevent interaction. The main purpose of such encapsulation is the controlled release of the encapsulated core to the outside, and in this case, the encapsulated core generally requires complete isolation from the outside during storage and processing.

In addition, external release of the core according to encapsulation may vary depending on the intended use. For example, in order to utilize the controlled external release of the core released from the shell, the core may be encapsulated and used for drugs, pesticides, spices, and mineral fertilizers. Among the various uses of these encapsulations, especially the core is included as a fire extinguishing agent, and the shell is destroyed in the event of a fire, and the fire extinguishing agent is released to the outside to extinguish the fire. Various technologies are being developed according to the demand.

For example, microcapsules for fire extinguishing use fire extinguishing agents as cores and encapsulate them inside the shell. When a fire occurs, decapsulation (decapsulation) is performed in which the fire extinguishing agents leave the shell within a short time in a narrow temperature range. Fire suppression can be done quickly, and the efficiency of fire suppression can be improved. However, these microcapsules for fire extinguishing are greatly affected by the external environment, and if the shell is destroyed by an external force or environment and the fire extinguishing agent, which is the core, is released to the outside, the amount of fire extinguishing agent is small at the moment when fire extinguishing is required. A problem of not meeting the concentration of the extinguishing agent may occur. Therefore, while securing a sufficient amount of extinguishing agent to provide an excellent extinguishing effect, research on a method for quickly suppressing a topic by applying various extinguishing microcapsules is being actively conducted.

On the other hand, the oil-immersed transformer has a structure in which windings are immersed in a tank containing insulating oil. It is easy to manufacture, inexpensive compared to other transformers, and has a wide range of use from small capacity to large capacity and from low voltage to high voltage. It is the most widely used transformer. In addition, it has a solid and airtight structure with a steel enclosure, so it can be used indoors or outdoors.

Such an oil-immersed transformer is impregnated with electrical insulating oil (mineral oil, mixed oil, silicone oil, etc.), and as it is impregnated with oil, there is no insulation deterioration due to moisture absorption, low noise and vibration, strong against surges, and periodic It has the advantage of being able to predict the life span by inspection. On the other hand, it takes up a lot of installation space compared to other transformers and uses insulating oil, so there is a risk of fire, so there is a disadvantage that regular inspection and maintenance of insulating oil is required.

To explain in more detail the fire caused by the insulating oil of the oil-immersed transformer, it typically starts with insulation breakdown in the high-voltage winding, and at the beginning of the occurrence, it is an accident with a low current, that is, a high impedance, or an accident between turns or between layers Accidents are reduced, resulting in a large increase in fault current. The fault current (arc current) decomposes the insulating oil and applies a high pressure to the transformer, which leads to an insulating oil ejection and an explosion accident. That is, when a short-circuit between windings occurs, a short-circuit current is required, which causes the insulator to rapidly deteriorate and expands to a short-circuit between winding layers. When a short-circuit between winding layers occurs, an arc short-circuit accident occurs inside the transformer, and the energy generated at this time decomposes the insulating oil into a volatile gas. This decomposed gas causes a rapid rise in pressure to compress the upper air layer of the transformer, and when the pressure inside the sealed transformer becomes excessive, an explosion occurs with insulating oil ejection and flame.

Accordingly, the inventors of the present invention developed a fire extinguishing product including a fire extinguishing microcapsule while researching to solve the above problems, and when the fire extinguishing product is attached to the lid of an oil-immersed transformer, the insulation oil inside When a fire occurs, it was found that it can be extinguished at an early stage, and the present invention was completed.

In this regard, Korean Patent Publication No. 10-2019-0127790 discloses a device and method for detecting a fire in a transformer and preventing an explosion.

The present invention has been made to solve the above problems of the prior art, and an object of the present invention is to provide a fire extinguishing product for preventing fire due to insulating oil.

As a technical means for achieving the above-described technical problem, one aspect of the present invention,

A flame retardant tape 120 having one side attached to the inside of the transformer lid 10; and a fire extinguishing film 140 having one surface attached to the other surface of the flame retardant tape 120, wherein the fire extinguishing film 140 contains microcapsules 150 for fire extinguishing dispersed in a photocurable resin 145. It provides a fire extinguishing product 100 for preventing fire due to transformer insulating oil, which includes.

The fire extinguishing film 140 may further include an adhesive material dispersed in the photocurable resin 145.

The adhesive material may include a material selected from the group consisting of self-adhesive materials, tackifiers, and combinations thereof.

The self-adhesive material may include a material selected from the group consisting of acrylic, silicone, olefin, urethane, epoxy, natural or synthetic rubber, and combinations thereof.

The tackifier is a rosin ester tackifier, a terephene-based tackifier, a petroleum resin-based tackifier, a coal-based tackifier, an alkyl phenol-based tackifier, It may include a material selected from the group consisting of tackifiers and combinations thereof.

The flame retardant tape 120 may have a thickness of 1 μm to 200 μm.

The fire extinguishing film 140 may have a thickness of 200 μm to 10 mm.

The photocurable resin may be obtained by photopolymerizing 60 to 100 parts by weight of a monomer, 1 to 30 parts by weight of a photoinitiator, and 1 to 30 parts by weight of an additive based on 100 parts by weight of an oligomer.

The fire extinguishing microcapsule 150 has a core 152-shell 154 structure, the core 152 contains 80 to 97% by weight of an extinguishing agent, and the shell 154 protects the core 152. It may be surrounded by a non-porous polymer and include a precipitating agent or a coagulant.

The fire extinguishing product 100 may further include a protective film 160 attached to the other surface of the fire extinguishing film 140.

The protective film 160 may have a water vapor transmission rate of 100 g/(m ² ·day) or less under an environment of a thickness of 25 μm, a temperature of 40° C., and a relative humidity of 90%.

The protective film 160 may have a thickness of 1 μm to 200 μm.

The flame retardant tape 120, the fire extinguishing film 140, and the protective film 160 attached to and stacked inside the transformer cover 10 may have a sealing agent 180 attached to both sides.

Since the product for fire extinguishing according to the present invention as described above is composed of a flame retardant tape, it may be smoothly attached to an object (the inner surface of the transformer cover).

In addition, the fire extinguishing product may simultaneously rupture the microcapsules included in the fire extinguishing film in a short time when a fire occurs due to the insulating oil stored inside the transformer, so that the fire can be extinguished quickly and efficiently.

In addition, the fire extinguishing product may have a protective film on the other side to prevent product defects due to mixing of insulating oil, and may have excellent durability because the outer side is sealed with a sealing agent.

1 is a schematic diagram showing an upper part of a transformer according to an embodiment of the present invention.
Figure 2 is a schematic diagram showing the attachment position of the fire extinguishing product according to one embodiment of the present invention.
Figure 3 is a schematic diagram showing a fire extinguishing product according to one embodiment of the present invention.
4 is a schematic view showing a fire extinguishing film according to an embodiment of the present invention.
5 is a schematic diagram showing a microcapsule for digestion according to an embodiment of the present invention.
6 is a SEM picture showing a microcapsule for digestion according to an embodiment of the present invention.
7 is a schematic diagram showing an experimental process for evaluating the fire extinguishing performance of a fire extinguishing product according to an embodiment of the present invention.
8 is a photograph showing a fire extinguishing product immersed in insulating oil according to an embodiment of the present invention.
9a to 9c are photographs showing the form of fire extinguishing products used according to an embodiment of the present invention, respectively.
10 is a schematic diagram showing an experimental process for evaluating the fire extinguishing performance of a fire extinguishing product according to another embodiment of the present invention.

Hereinafter, the present invention will be described in more detail. However, the present invention can be implemented in many different forms, and the present invention is not limited by the embodiments described herein, and the present invention is only defined by the claims to be described later.

In addition, terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In the entire specification of the present invention, 'include' a certain element means that other elements may be further included without excluding other elements unless otherwise stated.

The first aspect of the present application is,

A flame retardant tape 120 having one side attached to the inside of the transformer cover 10; and

A fire extinguishing film 140 having one side attached to the other side of the flame retardant tape 120;

including,

The fire extinguishing film 140 provides a fire extinguishing product 100 for preventing fire due to transformer insulating oil, which includes fire extinguishing microcapsules 150 dispersed in a photocurable resin 145.

Hereinafter, the fire extinguishing product 100 according to the first aspect of the present disclosure will be described in detail with reference to FIGS. 1 to 5. At this time, since each drawing shown in FIGS. 1 to 5 is only one embodiment, it should be understood that any form of modification or substitution of components is included within a range that does not impair the scope of the present invention.

In one embodiment of the present application, the fire extinguishing product 100 may be attached to the inner surface of the lid 10 of the transformer 1. At this time, the transformer (1) may be a conventionally used oil-immersed transformer, mold transformer, dry-type transformer or gas-insulated transformer, etc., and the transformer (1) according to the present invention is preferably an oil-immersed type with high risk of fire due to insulating oil. It could mean a transformer.

In one embodiment of the present application, a general lid configuration of the oil-immersed transformer 1 is shown in FIG. Referring to FIG. 1 , a bushing 20 and a pressure reducing device 30 may be formed on the lid 10 of the oil-immersed transformer 1. On the other hand, since the overall configuration of the oil-immersed transformer 1 together with the bushing 20 and the pressure reducing device 30 adopts a conventional configuration, a detailed description thereof will be omitted in the present invention.

In one embodiment of the present application, referring to FIG. 2, the fire extinguishing product 100 may be attached to a space other than the bushing 20 and the pressure reducing device 30 in the transformer lid 10. That is, as shown in FIG. 2, it may be attached to all other spaces, or it may be partially attached to only some of these spaces. Therefore, by not being attached to the bushing 20 and the pressure reducing device 30, it may be prevented from impairing the role of the components.

Hereinafter, with reference to FIG. 3, the fire extinguishing product 100 will be described in detail.

In one embodiment of the present application, the fire extinguishing product 100 may include a flame retardant tape 120 having one side attached to the inside of the transformer cover 10. In this case, the flame retardant tape 120 may be used without limitation as long as it is a tape having flame retardancy, and the flame retardant used to impart the flame retardant property may be a halogen compound (brominated compound) or the like, or A flame retardant tape composed of a phosphorus (P)-based flame retardant may be used.

In one embodiment of the present application, the thickness of the flame retardant tape 120 may be 1 μm to 200 μm, preferably about 20 μm to 100 μm, more preferably about 25 μm or 50 μm. may be When the thickness of the flame retardant tape 120 is less than 1 μm, the thickness is too thin and may not be smoothly attached to the transformer lid 10, and when the thickness exceeds 200 μm, the thickness is relatively too thick. Problems can arise that can come into contact with the insulating oil stored inside this transformer.

In one embodiment of the present application, the fire extinguishing product 100 may include a fire extinguishing film 140 having one surface attached to the other surface of the flame retardant tape 120. In this case, the fire extinguishing film 140 may include fire extinguishing microcapsules 150 dispersed in the photocurable resin 145.

In one embodiment of the present application, the photocurable resin may be obtained by photopolymerizing 60 to 100 parts by weight of a monomer, 1 to 30 parts by weight of a photoinitiator, and 1 to 30 parts by weight of an additive based on 100 parts by weight of an oligomer. , visible light, electron beam (EB), LED, etc.) may be cured and finally provided in the form of a film. At this time, the light may preferably be ultraviolet (UV) light, and in this case, it may be eco-friendly as non-VOCs (Volatile Organic Compounds) without using a solvent. In addition, the weight average molecular weight of the photocurable resin may be 100 to 1,000,000.

In one embodiment of the present application, the oligomer may include a material selected from the group consisting of acryl-based, epoxy-based, urethane-based, silicone-based, and combinations thereof as a component that determines the physical properties of the cured resin. In addition, the oligomer may preferably include an acrylic type, for example, polyacrylate, epoxy acrylate, urethane acrylate, polyester acrylate, silicone acrylate, polyether acrylate, and combinations thereof. It may be one containing a material selected from the group consisting of. That is, when the oligomer includes the above materials, the photocurable resin may have an effect of absorbing heat or mechanical shock, may control elasticity, and may have excellent viscosity and flowability.

In one embodiment of the present application, the monomer may be used as a diluent, and may also serve as a crosslinking agent. The monomer may include a material selected from the group consisting of acrylic, epoxy, urethane, silicone, and combinations thereof.

In one embodiment of the present application, the acrylic system includes a material selected from the group consisting of polyacrylate, epoxy acrylate, urethane acrylate, polyester acrylate, silicone acrylate, polyether acrylate, and combinations thereof it may be More specifically, the polyacrylic system is, for example, methyl acrylate, ethyl acrylate, hexyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, butyl cyclohexyl acrylate, isooctyl acrylate, isononyl acrylate, Isobornyl acrylate, isodecyl acrylate, decyl acrylate, lauryl acrylate, stearyl acrylate, tetrahydrofurfuryl acrylate, cyclic trimethylol formal acrylate, phenoxy polyethylene glycol acrylate, lauryl acrylate , benzyl acrylate, epoxyethyl acrylate, phenoxyethyl acrylate, hexanediol diacrylate, trimethylolpropane triacrylate, tripropylene glycol diacrylate, pentaerythritol tetraacrylate, tetraethylene glycol diacrylate, It may include a material selected from the group consisting of di(trimethylolpropane) tetraacrylate and combinations thereof.

In one embodiment of the present application, the epoxy system may be provided as a linear polymer epoxide, for example, diglycidyl ether of polyoxyalkylene glycol, and as a polymer epoxide having a backbone epoxy group, for example, As polybutadiene polyepoxy and polymer epoxides having pendant epoxy groups, for example, glycidyl methacrylate polymers or copolymers thereof and the like can be provided.

In one embodiment of the present application, the urethane-based urethane resin is obtained by mainly including a diol component and a diisocyanate component, and a UV curable urethane resin further comprising an acrylate may be provided as necessary. In this case, the diol may include an alkylene oxide-based polyol or a silicon-based polyol such as polyethylene glycol, polypropylene glycol, or ethylene glycol-propylene glycol. In the case of diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, hexamethylene 1,6-diisocyanate, isophorone diisocyanate, p-toluenesulfonyl isocyanate, dicyclomethane 4,4- Diisocyanate, diphenylmethane 4,4-diisocyanate, 2,4-diisocyanate, 2,2-diisocyanate, dodecane 1,12-diisocyanate, 2-ethyltetramethylene 1,4-diisocyanate, 2- It may include a material selected from the group consisting of methylpentamethylene 1,5-diisocyanate and combinations thereof.

In one embodiment of the present application, the silicone-based may include polyorganosiloxane, and for example, may be provided alone or in combination with polydimethylsiloxane resin and hydrogen silane.

In one embodiment of the present application, the photoinitiator may be used to initiate a polymerization reaction by absorbing light energy and generating radical ions, cations, and the like. The photoinitiator may include at least one selected from an acylphosphine oxide-based compound, an α-hydroxyketone-based compound, a phenyl glyoxylate-based compound, and a benzoin ether-based compound. At this time, the photoinitiator is suitable for an initiator that can be cured using a UV or LED UV lamp, for example, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide (Diphenyl ( 2,4,6-Trimethylbenzonyl)phosphine oxide) may be provided, but is not limited thereto.

In one embodiment of the present application, the additive may be specifically provided with an antifoaming agent and/or a flame retardant. The antifoaming agent may be added to prevent surface tension from being lowered by a third material other than air and liquid, and to remove air and air bubbles during manufacturing. In the case of a silicone-based antifoaming agent, it is prepared by emulsifying a silicone oil compound in which finely powdered inorganic fillers such as silica, titanium dioxide, and aluminum oxide are dispersed in silicone oil, and emulsification is performed to improve the stability of the antifoaming agent. ) process, a method of dispersing the silicone oil compound by making it hydrophilic can be applied by appropriately adjusting the amount of emulsifier used.

In addition, flame retardants are added to improve combustion resistance, and can prevent binder materials from burning and deteriorating fire extinguishing performance in the event of excessive fire, and are mainly used by safety requirements so as not to cause a larger fire. . Specifically, organic compounds containing bromine (Br), chlorine (Cl), etc. may be added to react with radicals during combustion to stop combustion, and halogen-based, phosphorus-based, nitrogen-based, or inorganic flame retardants may be mainly used. . Since the specific type of the flame retardant corresponds to a known technology, a detailed description thereof will be omitted.

In one embodiment of the present application, the digestive microcapsule 150 has a core 152-shell 154 structure, the core 152 contains 80 to 97% by weight of the extinguishing agent, and the shell ( 154) surrounds the core 152 and may be a non-porous polymer containing a precipitating agent or a coagulant.

In one embodiment of the present application, the size of the microcapsules 150 for fire extinguishing may preferably be 1 to 1,000 μm, and in case of fire, it is vaporized at a specific temperature, and the shell 112 is ruptured by the vaporization energy of the fire extinguishing agent. It can be torn apart and reacted as if it were. A very small amount of fire extinguishing agent is ejected from the size of one microcapsule 150, but when a plurality of fire extinguishing microcapsules 150 react explosively and simultaneously to eject a sufficient amount of vaporized fire extinguishing agent, the fire is effectively extinguished. can do. In addition, in the event of a fire, the extinguishing agent may be vaporized and expanded by heat, but due to the durability and airtightness of the shell 154 formed of the non-porous polymer, it does not react (burst, leak), and then, at a higher specific temperature, In particular, in the event of a fire, the extinguishing agent vaporized by the reaction directly acts on the ignition point of the fire, thereby reducing the four conditions of combustion: fuel (combustibles), oxygen (air), heat (ignition source), and chain reaction with heat (ignition source). You can extinguish the fire by cutting it off.

In one embodiment of the present application, the core 152 may include a fire extinguishing agent, the fire extinguishing agent is formed to be 80 to 97% by weight of the microcapsule 150, when included in the above range, the most excellent It can provide a digestive effect.

In one embodiment of the present application, the fire extinguishing agent may be a material with excellent fire extinguishing performance, the main component of which is not limited in production and use by the Montreal Protocol. For example, the fire extinguishing agent is fluorine carbon, fluorine chlorine carbon, fluorine bromine carbon-based halogen carbon, fluorine iodine carbon-based halogen carbon, 2-iodine-1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) and Iodofluorocarbon (FIC-217I1 or FIC-13I1), 1,1,1,2,2-Pentafluoroethane (CF ₃ CF ₂ H, HFC-125), 1,1,1,2,3, 3,3-Heptafluoropropane (CF ₃ CHFCF ₃ ), Chlorotetrafluoroethane (CHClFCF ₃ ), Fluorine-based ketone compound, dodecafluoro-2-methylpentan-3-one (FK-5-1-12, CF ₃ CF ₂ C(O )CF(CF ₃ ) ₂ )), 1-chloro-1,2,2,2-tetrafluoroethane(C ₂ HClF ₄ ), 2-chloro-1,1,1,2-tetrafluoroethane(CHClFCF ₃ , HCFC-124 ), decafluorocyclohexanone (perfluoro cyclohexanone), CF ₃ CF ₂ C(O)CF(CF ₃ ) ₂ (-1,1,1,2,4,4,5,5,5 -nonafluoro-2-trifluoromethyl-butan-3one), (CF ₃ ) ₂ CFC(O)CF(CF ₃ ) ₂ (-1,1,1,2,4,5,5,5 ,6,6,6,-octafluoro-2,4,-bis(trifluoromethyl)pentan-3-one), CF ₃ CF ₂ C(O)CF ₂ CF ₂ CF ₃ , CF ₃ C( O) CF(CF ₃ ) ₂ , 1,1,1,3,3,4,4,5,5,6,6,7,7,8,8,8,-hexadodecafluorooctane-2 -one (CF ₃ CF ₂ CF ₂ CF ₂ CF ₂ CF ₂ C(O)CF ₃ ), 1,1,1,3,4,4,4,-heptafluoro-3-trifluoromethylbutane- 2-one (CF ₃ C(O)CF(CF ₃ ) ₂ ), 1,1,1,2,4,4,5,5,-octafluoro-2-trifluoromethylpentan-3-one (HCF ₂ CF ₂ C(O)CF(CF ₃ ) ₂ ), 1,1,1,2,4,4,5,5,6,6,6,-undecafluoro-2-trifluoromethylhexane- 3-one (CF ₃ CF ₂ CF ₂ C(O)CF(CF ₃ ) ₂ ), 1-chloro-,1,1,3,4,4,4-hexafluoro-3-trifluoromethyl- Butan-2-one ((CF ₃ ) ₂ CFC(O)CF ₂ CL), 1,1,1,2,2,4,4,5,5,6,6,6-dodecafluorohexane- 3-one (CF ₃ CF ₂ C(O)CF ₂ CF ₂ CF ₃ ), 1,1,1,5,5,5,-hexafluoropentane-2-4-dione (CF ₃ C(O) CH ₂ C(O)CF ₃ ), 1,1,1,2,5,6,6,6-octafluoro-2,5-bis(trifluoromethyl)hexane-3,4-dione (( CF ₃ ) ₂ CFC(O)C(O)C(O)CF(CF ₃ ) ₂ ), 1,1,1,2,2,3,3,5,5,6,6,7,7, 7,-tetradecafluoroheptan-4-one (CF ₃ CF ₂ CF ₂ C(O)CF ₂ CF ₂ CF ₃ ), 1,1,1,3,3,4,4,4-octafluoro Butal-2-one (CF ₃ C(O)CF ₂ CF ₃ ), 1,1,2,2,4,5,5,5-octafluoro-1-trifluoromethoxy-4-trifluoro Methylpentan-3-one (CF ₃ OCF ₂ CF ₂ C(O)CF(CF ₃ ) ₂ ), 1,1,1,2,4,4,5,5,6,6,7,7,7 a material selected from the group consisting of ,-tridecafluoro-2-trifluoromethylheptan-3one (CF ₃ CF ₂ CF ₂ CF ₂ C(O)CF(CF ₃ ) ₂ ) and combinations thereof may include

In one embodiment of the present application, the fire extinguishing agent may be of the formula C _x H _y O _z Hal _k (where x, y, z, k are natural numbers, and Hal is Br, I, F), For example, 3M's Novec 1230 may be used, but is not limited thereto. On the other hand, the fire extinguishing agent exists in a liquid phase at room temperature, but may be a phase change to a gas phase at a temperature of 30 ° C to 100 ° C, and preferably a gas phase change at 30 ° C to 60 ° C, so that the capsule ruptures in the event of a fire It may be to extinguish the fire while doing it.

In one embodiment of the present application, the shell 154 is a non-porous polymer and may include a precipitating agent or a coagulant. In this case, the shell 154 may include 1 to 10 parts by weight of a precipitant or 1 to 10 parts by weight of a coagulant based on 100 parts by weight of the non-porous polymer. The shell 154 serves to contain the extinguishing agent by surrounding the outside of the extinguishing agent, which is the core 152, and maintains weather resistance and airtightness to protect the extinguishing agent from leaking into the atmosphere by the external environment at normal times or up to a specific temperature. it may be what it should be However, at 30 ° C to 100 ° C, the shell may be ruptured due to the phase change from the liquid phase to the gas phase of the fire extinguishing agent and the softening of the shell 154 at a high temperature. At this time, the shell 154 may have a thickness of 50 to 2,000 nm.

In one embodiment of the present application, it may be preferable that the shell 154 is made of a non-porous polymer in order to perform a role by temperature response. At this time, the shell 154 is, for example, a polyurethane resin, a polyurea resin, a polyamide resin, a polyester resin, a polycarbonate resin, an aminoaldehyde resin, a melamine resin, a polystyrene resin, a styrene-acrylate copolymer resin, It may include a material selected from the group consisting of styrene-methacrylate copolymer resin, gelatin, polyvinyl alcohol, phenol formaldehyde resin, resorcinol formaldehyde resin, and combinations thereof, but is not limited thereto no.

In one embodiment of the present application, the precipitant contained in the non-porous polymer is from the group consisting of potassium acetate, sodium citrate, sodium chloride, ammonium chloride, sodium iodide, potassium iodide, copper sulfate, sodium thiocyanate and combinations thereof It may contain selected materials. Meanwhile, the coagulant may include a material selected from the group consisting of aluminum sulfate, zinc hydroxide, iron hydroxide, iron chloride, and combinations thereof, but is not limited thereto.

In one embodiment of the present application, the fire extinguishing film 140 may have a thickness of 200 μm to 10 mm, preferably about 500 μm to 2 mm, and more preferably about 1 mm. can If the thickness of the fire extinguishing film 140 is less than 200 μm, the content of the fire extinguishing microcapsules 150 contained therein may decrease the fire extinguishing effect, and when the thickness exceeds 10 mm, the thickness is relatively too thick. There may be a problem that the fire extinguishing product 100 to contact the insulating oil stored inside the transformer.

In one embodiment of the present application, the fire extinguishing film 140 may further include an adhesive material dispersed in the photocurable resin 145. In this case, the adhesive material may include a material selected from the group consisting of a self-adhesive material, a tackifier, and combinations thereof. The fire extinguishing film 140 may have self-adhesive properties by further including an adhesive material. Therefore, the protective film 160 to be described later may be smoothly attached.

In one embodiment of the present application, the self-adhesive material may include a material selected from the group consisting of acrylic, silicone, olefin, urethane, epoxy, natural or synthetic rubber, and combinations thereof. When the self-adhesive material includes, for example, acrylic, the acrylic may include a material selected from the group consisting of 2-ethylhexyl acrylate, butyl acrylate, vinyl acetate, acrylic acid, and combinations thereof. .

In one embodiment of the present application, the tackifier is a rosin ester tackifier, a terephene-based tackifier, a petroleum resin-based tackifier, a coal tar-derived tackifier It may include a material selected from the group consisting of a coal-based tackifier, an alkyl phenolic tackifier, and combinations thereof. More specifically, the tackifier is pentaerythritol, methyl gallate, propyl gallate, lauryl gallate, octyl gallate, methol, tyramine hydrochloride, 1-(3-hydroxyphenyl)piperazine, 4- Bromo-2-(5-isosazolyl)phenol, 4-(imidazol-1-yl)phenol, apigenin, 2-(4,5-dihydro-1H-imidazol-2-yl)phenol, 3-(4,5-dihydro-1H-imidazol-2-yl)phenol, 4-(4,5-dihydro-1H-imidazol-2-yl)phenol, 4-nitro-2-(1H -pyrazole-3-yl)phenol, 2-(2-hydroxyphenyl)-1H-benzimidazole, 4-(4-methyl-4,5-dihydro-1H-imidazol-2-yl)phenol , 1-amino-2-naphthol hydrochloride, 2,4-diaminophenol dihydrochloride, 2-acetamidophenol, 2-amino-3-nitrophenol, 2-amino-4-chloro-5-nite Lophenol, 2-amino-5-nitrophenol, 3-amino-2-naphthol, 3-methoxytyramine hydrochloride, 4,7-dimethoxy-1,10-phenanthroline, 4-amino-1- Naphthol hydrochloride, 4-amino-3-chlorophenol hydrochloride, 4-aminophenol hydrochloride, 4-tritylphenol, 8-amino-2-naphthol, biochanin A, chloranil, pentabromophenol, quercetin Dihydrate, fisetin, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, tris(3,5-di-tert- Butyl-4-hydroxybenzyl)isocyanurate, octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 2,5-bis(1,1-dimethyl Propyl)-1,4-benzenediol, 1,1,3-tris-(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, triethylene glycol-bis(3-tert-butyl-4 -Hydroxy-5-methylphenyl)propionate, 2,2-methylenebis(4-methyl-6-(1-methylcyclohexyl)-phenol), tris(2,4-di-tert-butylphenyl)phos It may include a material selected from the group consisting of pite and combinations thereof.

In one embodiment of the present application, the weight mixing ratio of the microcapsules 150 for digestion and the photocurable resin may be 1: 0.3 to 2, preferably 1: 0.5. In addition, when the adhesive material is a self-adhesive material, the content of the self-adhesive material may be 35 parts by weight to 55 parts by weight based on the total 100 parts by weight of the fire extinguishing film 140. If the adhesive material is a tackifier, The content of the tackifier may be 5 parts by weight to 20 parts by weight based on the total 100 parts by weight of the fire extinguishing film 140. When the weight mixing ratio of the materials satisfies the above range, it may be possible to realize excellent fire extinguishing effect and adhesive performance within a range that does not impair the physical properties of the fire extinguishing film 140 including the material. In addition, the content of the digestive microcapsules 150 relative to the total weight of the digestive film 140 may be 30 to 80% by weight. Therefore, the fire extinguishing film 140 according to the present invention completely protects the fire extinguishing microcapsules 150 and is smoothly attached to the object, but in the event of a fire, the fire extinguishing microcapsules 150 can burst simultaneously in a short time, thereby providing efficient Fire suppression may be possible.

In one embodiment of the present application, the fire extinguishing product 100 may further include a protective film 160 attached to the other surface of the fire extinguishing film 140. At this time, the protective film 160 is attached to protect the fire extinguishing product 100 from the insulating oil stored therein, and may have various forms such as tape, foil, and film. In addition, the protective film 160 may be made of a material having low gas permeability and low water vapor permeability. That is, the protective film 160 may have a water vapor transmission rate of 100 g/(m ² ·day) or less under an environment of a thickness of 25 μm, a temperature of 40° C., and a relative humidity of 90%. Specifically, the protective film 160 is polyethylene (PE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), stretched polypropylene (OPP), unstretched polypropylene (CPP), ethylene vinyl acetate (EVA) And it may include a material selected from the group consisting of combinations thereof, preferably low density polyethylene (LDPE) or polyethylene terephthalate (PET) may be used.

In one embodiment of the present application, the protective film 160 may have a thickness of 1 μm to 200 μm, preferably about 20 μm to 80 μm, and more preferably about 50 μm. there is. If the thickness of the protective film 160 is less than 1 μm, the thickness is too thin to effectively protect the inflow of insulating oil, and if it exceeds 200 μm, the thickness is relatively too thick, so that the fire extinguishing product 100 including this is a transformer Problems that can come into contact with the insulating oil stored inside and that the fire extinguishing microcapsules 150 included in the fire extinguishing film 140 do not operate normally may occur.

In one embodiment of the present application, the flame retardant tape 120, the fire extinguishing film 140, and the protective film 160 attached to the inside of the transformer cover 10 and laminated have a sealing agent 180 attached to both sides, there may be At this time, the sealant 180 may be attached to perform a role of more firmly attaching the fire extinguishing product 100 to the inside of the transformer cover 10 and a role of preventing insulating oil from flowing into the inside. Meanwhile, the sealing agent 180 may be an epoxy resin or a silicone resin.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

manufacturing example . fire extinguishing micro capsules Manufacture of fire extinguishing film containing

Prepare 0.5 to 1 part by weight of photoinitiator TPO and 4 to 5 parts by weight of PI184, 1 to 2 parts by weight of CTFA, 2 to 3 parts by weight of HDDA, 1 to 2 parts by weight of THFA, 6 to 7 parts by weight of IBOA, 7 to 7 parts by weight of SR217 8 parts by weight were mixed.

Here, 14 to 15 parts by weight of CN8887 as an oligomer, 9 to 10 parts by weight of PU3000, 0.1 to 0.3 parts by weight of BYK333 and 4 to 5 parts by weight of Otsuka SPB-100 as additives were additionally added to prepare a photocurable resin. A photocurable resin mixture was prepared by adding a microcapsule for digestion and pentaerythritol as an adhesive material to the prepared photocurable resin at a weight ratio of 1: 2: 0.5. This was cured under UV 250 mJ/cm ² conditions to prepare a self-adhesive fire extinguishing film. At this time, the curing conditions were (2,600 W, temperature 40°C).

Example 1. Manufacturing of fire extinguishing products and attaching them to objects

First, as a flame retardant tape, a phosphorus (P)-based flame retardant tape having a thickness of 50 μm was prepared, and then the fire extinguishing film (thickness 1 mm) prepared in the above Preparation Example was attached to one side. Then, the other side of the flame retardant tape was attached to the inner side of the tempered glass shown in FIG. 7 .

After that, as shown in FIG. 3, both sides of the flame retardant tape and the fire extinguishing film attached to the tempered glass were sealed using a silicone resin.

Example 2. Manufacture of fire extinguishing products and attachment to objects

In Example 1, the fire extinguishing product was prepared in three types as follows, and the other side of the flame retardant tape was attached to the inner side of the tempered glass shown in FIG. 7.

Example 2-1: Dimensions of product for fire extinguishing (190 mm x 140 mm x 1T) / Figure 9a

Example 2-2: Dimensions of product for fire extinguishing (100 mm x 100 mm x 1T) / Figure 9b

Example 2-3: Dimensions of product for fire extinguishing (190 mm x 140 mm x 1T, “ㅁ” shape) / FIG. 9c

After that, as shown in FIG. 3, both sides of the flame retardant tape and the fire extinguishing film attached to the tempered glass were sealed using a silicone resin.

Example 3. Manufacturing of fire extinguishing products and attaching them to objects

In Example 1, two types of protective tapes were attached to the other side of the fire extinguishing film as follows, and the other side of the flame retardant tape was attached to the inner side of the tempered glass shown in FIG. 10.

Example 3-1: Specification of fire extinguishing product (100 mm x 100 mm x 1T) / protective tape (PE)

Example 3-2: Specification of fire extinguishing product (100 mm x 100 mm x 1T) / protective tape (PET)

After that, as shown in FIG. 3, both sides of the flame retardant tape, the fire extinguishing film, and the protective tape attached to the tempered glass were sealed using a silicone resin.

Experimental example 1. For fire extinguishing microcapsule Appearance Observation

In order to observe the appearance of the microcapsules for digestion prepared in the above Preparation Example, SEM pictures were taken thereof, and the results are shown in FIG. 6.

As shown in FIG. 6, it was confirmed that the microcapsules for digestion used in Preparation Examples and Examples of the present invention were uniformly formed in a spherical shape in appearance.

Experimental example 2. Insulation oil for fire extinguishing products Immersion test

Insulation oil (mineral oil type 1 No. 4) soaking test of the fire extinguishing product prepared in Example 1 was conducted. At this time, the experiment was conducted by dividing the fire extinguishing product not sealed with silicone resin (Fig. 8(a)) and the fire extinguishing product sealed with silicone resin (Fig. 8(b)), and each fire extinguishing product After being immersed in insulating oil for 2 weeks, the results are shown in FIG. 8, respectively.

As shown in FIG. 8, in the case of fire extinguishing products not sealed with silicone resin (FIG. 8 (a)), insulating oil permeates into the flame retardant tape, whereas fire extinguishing products sealed with silicone resin (FIG. 8 (b) ), it was confirmed that the insulating oil did not permeate into the flame retardant tape.

Through this, it was confirmed that when attaching the fire extinguishing product to the actual transformer, it is more stable in terms of durability than attaching by sealing with silicone resin.

Experimental example 3. Fire extinguishing simulation test of fire extinguishing products

1. Simulation of fire extinguishing according to the presence or absence of fire extinguishing products

As shown in FIG. 7, equipment for the fire extinguishing simulation experiment was arranged, and at this time, the fire extinguishing product prepared in Example 1 was used as the fire extinguishing product.

Thereafter, after igniting the flame using a torch in insulating oil, the fire extinguishing product is not attached, the fire extinguishing product is not immersed in insulating oil, and the fire extinguishing product is immersed in insulating oil for 2 weeks. Each digestion time was measured and the results are shown in Table 1 below.

[Table 1]

As shown in Table 1, it was confirmed that natural fire extinguishing did not occur when the fire extinguishing product was not attached, and when the fire extinguishing product was attached, the fire extinguishing agent inside the fire extinguishing microcapsule was sprayed and It was confirmed that digestion proceeded smoothly in about 20 seconds.

On the other hand, in the case of products for fire extinguishing that were immersed in insulating oil, the time for extinguishing took a little longer than for products that were not immersed, but there was no big difference, so it was confirmed that fire extinguishing can be carried out smoothly even if the actual insulating oil touches the product for fire extinguishing. could

2. Simulation of fire extinguishing according to the type of product for fire extinguishing

As shown in FIG. 7, equipment for the fire extinguishing simulation experiment was arranged, and at this time, the fire extinguishing product prepared in Example 2 was used as the fire extinguishing product.

Thereafter, after igniting the flame using a torch in insulating oil, the extinguishing time was measured by dividing according to the type of fire extinguishing product, and the results are shown in Table 2 below.

[Table 2]

As shown in Table 2, it was confirmed that digestion proceeded within less than 20 seconds regardless of the type of fire extinguishing product.

On the other hand, depending on the form of the fire extinguishing product, it was confirmed that the form of Example 2-1 was digested the fastest, and the form of Example 2-3 took a long time to complete digestion.

3. Simulation of fire extinguishing according to the type of protective tape

As shown in FIG. 10, equipment for the fire extinguishing simulation experiment was arranged, and at this time, the fire extinguishing product prepared in Example 3 was used as the fire extinguishing product.

Thereafter, after igniting the flame using a torch in insulating oil, the extinguishing time was measured by dividing according to the type of fire extinguishing product, and the results are shown in Table 3 below.

[Table 3]

As shown in Table 3, it was confirmed that the fire extinguishing proceeded within about 20 to 25 seconds regardless of the type of protective tape, and the fire extinguishing product of Example 3-1 using PE depending on the type of protective tape It was confirmed that the digestion rate was faster than that of the fire extinguishing product of Example 3-2 using this PET.

On the other hand, since the fire extinguishing product according to the present invention is attached to the inside of a transformer in which insulating oil is stored and used, in terms of protecting the fire extinguishing film from insulating oil (long-term durability), Example 3 with a protective tape attached thereto It was expected that the potential for practical use of fire extinguishing products according to

In the above, the present invention has been described in detail with preferred embodiments with reference to the drawings, but the scope of the technical idea of the present invention is not limited to these drawings and embodiments. Therefore, various modifications or equivalent ranges of embodiments may exist within the scope of the technical idea of the present invention. Therefore, the scope of the technical idea according to the present invention should be interpreted by the claims, and the technical idea within the equivalent or equivalent range should be construed as belonging to the scope of the present invention.

1: transformer
10: transformer lid
20: bushing
30: pressure reducer
100: fire extinguishing product
120: flame retardant tape
140: fire extinguishing film
145: photocurable resin
150: microcapsule for digestion
152: core
154: shell
160: protective film
180: sealing agent

Claims (13)

A flame retardant tape 120 having one side attached to the inside of the transformer lid 10; and
A fire extinguishing film 140 having one side attached to the other side of the flame retardant tape 120;
including,
The fire extinguishing film 140 includes fire extinguishing microcapsules 150 dispersed in a photocurable resin 145. Fire extinguishing product 100 for preventing fire due to transformer insulating oil.
According to claim 1,
The fire extinguishing film 140 further comprises an adhesive material dispersed in the photocurable resin 145.
According to claim 2,
The fire extinguishing product (100) of claim 1, wherein the adhesive material comprises a material selected from the group consisting of self-adhesive materials, tackifiers, and combinations thereof.
According to claim 3,
The fire extinguishing product (100), wherein the self-adhesive material comprises a material selected from the group consisting of acrylic, silicone, olefin, urethane, epoxy, natural or synthetic rubber, and combinations thereof.
According to claim 3,
The tackifier is a rosin ester tackifier, a terephene-based tackifier, a petroleum resin-based tackifier, a coal-based tackifier, an alkyl phenol-based tackifier, A fire extinguishing product (100) comprising a material selected from the group consisting of tackifiers and combinations thereof.
According to claim 1,
The fire extinguishing product 100, wherein the flame retardant tape 120 has a thickness of 1 μm to 200 μm.
According to claim 1,
The fire extinguishing product 100 having a thickness of 200 μm to 10 mm of the fire extinguishing film 140.
According to claim 1,
The photocurable resin is a fire extinguishing product (100) obtained by photopolymerizing 60 to 100 parts by weight of a monomer, 1 to 30 parts by weight of a photoinitiator, and 1 to 30 parts by weight of an additive based on 100 parts by weight of an oligomer.
According to claim 1,
The digestive microcapsule 150 has a core 152-shell 154 structure,
The core 152 contains 80 to 97% by weight of an extinguishing agent,
The shell 154 surrounds the core 152 and is a non-porous polymer and contains a precipitating agent or a coagulant.
According to claim 1,
The fire extinguishing product 100,
A protective film 160 attached to the other surface of the fire extinguishing film 140;
The fire extinguishing product (100) further comprising a.
According to claim 10,
The protective film 160 has a moisture vapor transmission rate of 100 g/(m ² ·day) or less under an environment of a thickness of 25 μm, a temperature of 40 ° C, and a relative humidity of 90%.
According to claim 10,
The protective film 160 has a thickness of 1 μm to 200 μm.
According to claim 10,
The flame retardant tape 120, the fire extinguishing film 140, and the protective film 160 attached to the inside of the transformer cover 10 and laminated thereto have a sealing agent 180 attached to both sides of the fire extinguishing product 100 ).

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