WO2017026922A1 - Система для сигнализации о предпожарной ситуации - Google Patents
Система для сигнализации о предпожарной ситуации Download PDFInfo
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- WO2017026922A1 WO2017026922A1 PCT/RU2016/000531 RU2016000531W WO2017026922A1 WO 2017026922 A1 WO2017026922 A1 WO 2017026922A1 RU 2016000531 W RU2016000531 W RU 2016000531W WO 2017026922 A1 WO2017026922 A1 WO 2017026922A1
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- polymer
- signaling
- fire
- situations according
- fire situations
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/04—Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/52—Amides or imides
- C08F20/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F20/56—Acrylamide; Methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/02—Halogenated hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/24—Homopolymers or copolymers of amides or imides
- C08L33/26—Homopolymers or copolymers of acrylamide or methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/02—Polyureas
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
Definitions
- the present invention relates to means for monitoring pre-fire situations resulting from local overheating of electrical equipment and can be used to prevent fires resulting from malfunctions of electrical wiring.
- the hydrogen concentration is 0.001-0.002%.
- the threshold for detecting a fire early warning system in atmospheric air under normal conditions should be at the level of 0.002% for most gases, including hydrogen and carbon monoxide. In this case, it is desirable that the performance the system was no worse than 10 s. This conclusion can be considered as fundamental for the development of a number of warning gas fire alarms [1].
- the disadvantages of this method include its low reliability, a greater likelihood of false alarms, as well as insufficiently early detection of fires, which is due to the generation of a control signal without taking into account the rate of increase in concentration and the assessment of a fire hazard situation by the concentrations of an insufficient number of monitored gas components.
- a known method and device for detecting pre-fire situations, based on infrared spectroscopy contains an optically coupled radiation source and receiver connected to the first amplifier, and a processing circuit that contains two radiation receivers, the second and third amplifiers, which together with the first amplifier are connected to the analog-to-digital converter through the corresponding blocks of permissible concentrations of fire hazardous components, the output of which connected via a microprocessor and a digital-to-analog converter to the alarm unit, while the second output of the microprocessor is connected to a monitor. It is intended for the detection of thermal decomposition products of various organic materials formed under the influence of an abnormal heat source, which can occur, in particular, as a result of sparking or short circuit in electrical switching equipment
- a disadvantage of the known technical solution is that it reacts to the appearance of gases and smoke accompanying the already started fire, i.e. gives a signal directly at the moment of beginning of a fire or after it.
- a known method for diagnosing a pre-fire situation and preventing the occurrence of a fire including measuring with the help of a sensor node informative parameters: concentrations of gaseous products of thermal decomposition in air, namely CO, CO 2 , NO x HC1, oxidizing agents, smoke, as well as temperature, measuring the delay time of a signal from each of the sensors using a fire simulator, determining the values of the derivative dependencies of the time variation of the informative parameters measured by each sensor, generating a control with fire alarm and the possible activation of the fire extinguishing means and turning off the power as a result of the fire hazard analysis TM based on at least two informative parameters measured using at least two sensors, characterized in that the concentrations of ⁇ 2 , ⁇ are also measured as informative parameters 4 , NH 3 , Og, C, H 2 S, SO 2 , NSON, C b NgON, reducing agents, in the time interval of 0.1-60 s, at least one derivative value is determined for each dependence of the informative parameters
- a known device for monitoring the parameters of the gas environment containing gas sensors, an analog measuring part, a microprocessor module for controlling the operating modes of the sensors, primary processing of measurement data and their storage, as well as the power supply circuit of the sensor and the device as a whole, characterized in that the electronic circuit of the device a hardware-software interface for transmitting data and commands over wireless networks is integrated, and the algorithm for measuring and transmitting data is optimized for the purpose of autonomous operation CTBA without replacing the battery during calibration interval.
- the device can be used as a pre-fire detector for monitoring the chemical composition of air, in particular, for determining the content of CO and H 2 [5].
- a disadvantage of the known device is the possibility of false positives when detecting pre-fire situations, as well as low reliability during operation due to the high sensitivity to interference.
- patent document [6] discloses a device for early detection of overheating in hard-to-reach places of electrical and mechanical equipment, which is based on the use of an odorant 1 sealed in a hot melt composition, installed near the heat-generating part of device 2, for which superheat control is carried out.
- the odor sensor 3 is installed downstream of this odorant (see Fig. 1).
- an odorant 1, microcapsules of a hot-melt composition containing flavorings. Flavorants mixed with wax or other fatty acids may also be used.
- This device is considered by the inventors as the closest analogue of the prior art (prototype).
- a disadvantage of the solution known from [6] is the use of hot-melt polymers.
- a heat-generating part When a heat-generating part is heated above the softening or melting temperature of the hot-melt polymer, it may peel off or drip onto parts of the electrical equipment, for example, to insulate the wiring, a violation of which can lead to a short circuit.
- the description of the patent document [6] indicates that the selection of the odorant from the proposed polymer compositions occurs due to melting of the material. This circumstance may be accompanied by unfavorable consequences for the electrician, such as foaming and spraying of the polymer mass with the released gas. Hot foam, droplets of polymer, or polymer melt falling from a sticker onto adjacent contacts, electrical equipment, fans, or sensors can cause malfunctions or even ignition.
- the aim of the invention is to increase the likelihood of detecting a pre-fire situation at an early stage and minimizing the number of false positives.
- the pre-fire alarm system consists of a gas sensor connected to a recorder that is connected to a signal supply system and applied to sections of the electrical circuit of a polymer composite material, which are prone to heating, having an opening temperature in the range of 80-200 ° C and containing a continuous phase, which is formed by a thermosetting polymer, and a boiling substance enclosed within the continuous phase, which is easily detected by the aforementioned gas sensor.
- Fig. 1 shows a known device for the early detection of overheating in hard-to-reach places of electrical and mechanical equipment (according to patent document [6]).
- Fig. 2 shows the results of thermogravimetric analysis microencapsulated composite material according to the invention obtained according to Example 1.
- FIG. 3 schematically shows a General view of the alarm device.
- Fig. 4 shows a General view of a product made of composite material mounted on live parts.
- Fig. Figure 5 shows the time dependences of the gas concentration (green curve) and the temperature of the heating plate (red curve) in the event of a system triggering upon instantaneous heating of a composite polymer material in a large-volume cabinet.
- Fig. Figure 6 shows the time dependences of the gas concentration (green curve) and the temperature of the heating plate (red curve) in the event of a system triggering when the composite polymer material is smoothly heated in a large-volume cabinet.
- FIG. Figure 7 shows the time dependences of the gas concentration (blue curve) and the temperature of the heating plate (red curve) in the case of a system triggering upon instantaneous heating of a composite polymer material in an open small-volume cabinet.
- FIG. Figure 8 shows the time dependences of the gas concentration (blue curve) and the temperature of the heating plate (red curve) in case of repeated operation of the system.
- the inventive system is intended for the early detection of pre-fire situations when the heating of wires or electrical contacts exceeds the permissible operating parameters (> 100 ° C), but does not yet reach the level at which thermal decomposition of materials capable of fire occurs (> 250 ° C).
- thermosetting polymers As thermally activated (in this case, under Thermoactivity is understood as the property of explosive opening of a material when heated to a certain temperature) of polymer composite materials
- the following materials containing thermosetting polymers can be used: microencapsulated materials or porous materials with closed pores containing fillers.
- Low boiling substances contained within the polymer composite material may include, but are not limited to, halogenated hydrocarbons, for example 1, 1,1,3,3-pentafluorobutane (HFC 365), 1, 1, 1, 2, 2,4, 5, 5 , 5-nonafluoro-4- (trifluoromethyl) pentan-3-one (Novec 1230).
- HFC 365 1, 1,1,3,3-pentafluorobutane
- Novec 1230 1,5-nonafluoro-4- (trifluoromethyl) pentan-3-one
- fluorine-containing halogenated hydrocarbons over the odorants or flavorings used in the patent document [6] is that they do not have a pronounced smell, easily perceived by humans, and are low-toxic compounds. This circumstance allows us to use the proposed system near a crowd of people, for example, at transport facilities and even in rooms where people can constantly be. Isolation of 1,1,1,3,3-pentafluorobutane (HFC 365), 1,1,1,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl) pentan-Z-one (Novec 1230 ) instead of odorants, it will not lead to panic and will not affect the excess of the MPC inside the protected object.
- HFC 365 1,1,1,2,2,4,5,5,5-nonafluoro-4- (trifluoromethyl) pentan-Z-one
- fluorine-containing hydrogen halides are a class of substances that can be selectively detected by an ultra-low concentration sensor (less than 0.001 ppm)
- odorants such as lower mercaptans, dialkyl sulfides, dialkyl disulfides or their solutions can also be used as boiling substances.
- odorants such as lower mercaptans, dialkyl sulfides, dialkyl disulfides or their solutions can also be used as boiling substances.
- the advantage of this solution is that in this case, the exact location of overheating is possible by means of human smell.
- Odorant may be methyl mercaptan, ethyl mercaptan, n- propyl mercaptan, izopropilmerkaptan, n-butyl mercaptan, sec- butyl mercaptan, izobutilmerkaptan, tert-butyl mercaptan, amilmerkaptan, izoamilmerkaptan, silmerkaptan, dimethyl, diethyl, diallyl disulfide, allilmetilsulfid, methylethyl sulfide, diizopropilsulfid, dimethyl disulfide, diethyl disulfide, dipropyl disulfide, diisopropyl disulfide.
- the boiling substance contained within the polymer composite material is an odorant mixed with solvents.
- solvents allows one to achieve lower temperatures and narrower temperature ranges for opening the composite material while maintaining its mechanical characteristics.
- Solvents for odorant include, but are not limited to, hydrofluorocarbons, hydrofluorocarbons, fluorocarbons, chlorocarbons, chlorofluorocarbons, alkanes, ethers, or mixtures thereof.
- the polymer composite material is a microcapsule with a core of a boiling substance enclosed in a binder.
- Microcapsules have a two-layer polymer shell, the inner layer of which consists of gelatin or its derivative, and the outer reinforcing layer is of crosslinked polymers, urea resins, resorcinol resins, melamine resins, phenolic resins or polyvinyl acetate resins.
- Outer diameter microcapsules is 1-5000 microns, the average thickness of the polymer shell is 0.01-1 microns.
- the polymer binder may be an acrylic resin and / or epoxy resin and / or polyamide and / or polyvinyl acetate and / or polyester and / or polyurea and / or polyvinyl alcohol and / or polyurethane.
- the polymer composite material is a polymer gel formed by crosslinked polymer particles swollen in a solution of a low boiling substance, placed in a thermosetting polymer matrix.
- the crosslinked polymer is polyacrylamide, crosslinked with ⁇ , ⁇ '-methylenebisacrylamide, polyvinyl alcohol crosslinked with epichlorohydrin or polyvinyl alcohol crosslinked with glutaraldehyde.
- the average particle size of the crosslinked polymer is 50-500 microns.
- the polymer matrix is polyorganosiloxanes, polyvinyl acetate, epoxies.
- the polymer composite material is silica gel or zeolite particles with an odorant adsorbed onto them, placed in a thermosetting polymer matrix.
- the average particle size is preferably 10-2000 microns.
- the polymer matrix included in the composition of the composite material includes, but is not limited to this list, polyurethane, polyurea.
- the polymer composite material is a porous polymer particles with closed pores or channels filled with an odorant or odorant solution, placed in a thermosetting polymer matrix.
- the average particle size is preferably 200-5000 microns.
- the average pore diameter is preferably 10-100 microns.
- Crosslinked polystyrene, polyorganosiloxanes, polyurethane, polyurea are offered as a porous polymer.
- the polymer matrix, which is part of the composite material includes, but is not limited to this list, polyvinyl acetate, epoxy resins.
- thermosetting (in particular, crosslinked) polymers avoids the disadvantages of the hot-melt polymer compositions mentioned in the document [6], such as foaming of the material during gas evolution, draining of the material onto electrical equipment at high temperatures, slow gas evolution.
- thermoset cross-linked polymers When using thermoset cross-linked polymers, the opening of pores occurs due to the rupture of the material by an overheated liquefied gas, which is under high overpressure. This leads to an “explosive” evolution of gas from the material, due to which a simultaneous achievement of a high concentration of signal gas and the fastest response of the system are achieved.
- the high output rate of the signal substance favorably distinguishes the use of crosslinked thermosetting polymers from the hot-melt materials specified in the patent document [6].
- the odorant exit rate is limited by its diffusion rate through the polymer, as well as by other processes that may accompany the melting of the material, for example, foaming.
- thermosetting polymers does not occur in a narrow temperature range corresponding to the polymer melting (transition to a viscous flowing state), but in a wide one.
- the opening (explosive destruction) of the shell occurs when the gas inside the pressure pore reaches the corresponding shell strength. Since, due to the peculiarities of the synthesis of such polymers, the pores differ from each other both in size and in shell thickness, their opening occurs at different pressures and, accordingly, temperatures.
- the temperature range in which the thermoset explosive opening occurs composite material is 103-163 ° C, as illustrated by the thermogravimetric curve shown in Fig. 2.
- the system can operate repeatedly.
- the proposed polymer composite material is heated to the opening temperature in a predetermined opening temperature range, then cooled to a temperature lower than the specified opening temperature range, for example, to a temperature corresponding to the acceptable operating parameters of the equipment, and then heated again to the opening temperature in the specified temperature range, which is higher than the previous temperature, then when re-heated, there will also be sufficient to form Igna overheat gas evolution and operation of the system (see. Example 5).
- Fig. Figure 3 schematically shows a general view of the alarm device
- Fig. 4 shows a General view of a product made of composite material mounted on live parts.
- the pre-fire alarm device shown in Fig. 3 consists of a plate 9 made of a cross-linked polymer composite material containing a low-boiling substance inside the cavities 18, a gas sensor 10 connected through a recorder 11 to the signal supply system 12.
- the plate 9 is glued to the base 14, which has an adhesive layer 15 on the back side by means of which the plate 9 is fixed on the current-carrying part 13.
- the adhesive layer 15 Prior to installation on the electrical installation product, the adhesive layer 15 is closed by an easily detachable protective film 17. When heated above a certain temperature the plate 9 emits gas 16 detected by the gas sensor 10.
- Fig. 4 shows a plate 9 made of a cross-linked polymer composite material containing a low-boiling substance inside the cavities 18. Prior to installation on an electrical installation product, the adhesive layer 15 is closed with an easily removable protective film 17.
- the use of the described polymeric materials makes it possible to obtain hermetic shells that allow storing the low-boiling substance enclosed in them for a long time without significant losses.
- the pressure of the filler a low-boiling substance inside the continuous phase of the polymer — increases, which leads to rupture of the composite material and the release of gaseous products detected by the sensor into the atmosphere.
- Changing the composition of the filler and the polymer matrix allows you to vary the opening temperature of the material.
- the proposed system allows to detect potentially fire hazardous situations long before the appearance of smoke or open flame.
- the present invention allows to detect pre-fire situations much earlier than existing analogues.
- the proposed system is designed for multiple operations, since only a small fraction contained in the composite material of boiling material is sufficient to detect overheating, so that after cooling the composite material below temperatures in the opening temperature range, there will be enough boiling substance in it for repeated operations in case of repeated heating before temperatures in the range of temperature of opening. Due to the direct contact of the polymer composite material with the heating section of the electric circuit, a high system response speed is ensured.
- Freon 365 was washed with sodium thiosulfate solution, dried with phosphorus pentoxide and distilled. 720 g of polyisocyanate was mixed with 9 kg of freon and vigorously mixed 2 times for 2 minutes with a frequency of 10 minutes. The resulting mixture was left to stand for 30 minutes and filtered through cotton. The filtrate was placed in the apparatus, 10 l of a 1% solution of polyvinyl alcohol in water was added. The resulting mixture was stirred until a stable emulsion was obtained, and then a 1% solution of polyethylene polyamine in 10 l of water was added to it for 3 hours. Stirred for 7 days at room temperature.
- microcapsules were washed with water 5 times until neutral, mixed with PVA in a ratio of 1: 1 and applied in a thin layer on a silicone substrate. After the first drying, another layer of PVA capsules was applied and so on until a sheet with a thickness of 1.25 mm was obtained.
- Test procedure A product made in accordance with Example 1 of a polymer composite material weighing 1.5 g and a thickness of 1.25 mm was glued to a heating plate under normal conditions.
- the plate was placed in the center of the cabinet with a volume of 1 m 3 (cabinet height was 2.0 m, width ⁇ 1.0 m, and depth ⁇ 0.5 m).
- the temperature of the plate gradually increased to 135 ° C, which was controlled by a thermocouple fixed between the composite material and the heating plate.
- the concentration of the signal gas released by the composite polymer material was recorded with a SP-42A-00 semiconductor gas sensor (manufactured by FIS Inc.) located at a distance of 1 cm from the geometric center of the upper edge of the cabinet.
- Fig. Figure 6 shows the time dependences of the gas concentration (green curve) and the temperature of the heating plate (red curve).
- Test procedure An article made in accordance with Example 1 of a polymer composite material weighing 0.5 g with a thickness of 1.25 mm was glued to a heating plate, the temperature of which was maintained in the range from 130 to 135 ° C.
- the plate was placed at a distance of 1 cm from the geometric center of the lower edge of the cabinet (see Fig. 3A), having a volume equal to 50 liters (the cabinet height was 70 cm, width ⁇ 40 cm, and depth 18 cm).
- the cabinet door (front face) in the experiment was left wide open.
- the temperature of the plate was controlled by a thermocouple fixed between the product made of composite polymer material and the heating plate.
- the concentration of the signal gas released by the composite polymer material was recorded with a SP-42A-00 semiconductor gas sensor (manufactured by FIS Inc.) located 1 cm from the geometric center of the upper edge of the cabinet.
- Fig. 7 shows the time dependences of the gas concentration (blue curve) and the temperature of the heating plate (red curve).
- Test procedure A product made in accordance with Example 1 of a polymer composite material weighing 1.5 g and a thickness of 1.25 mm was glued to a heating plate under normal conditions.
- the plate was placed in the geometric center of the cabinet with a volume of 1 m 3 (cabinet height was 2.0 m, width ⁇ 1.0 m, and depth ⁇ 0.5 m).
- the temperature of the plate was controlled by a thermocouple fixed between the product made of composite polymer material and the heating plate.
- the concentration of the signal gas released by the composite polymer material was recorded with a SP-42A-00 semiconductor gas sensor (manufactured by FIS Inc.) located at a distance of 1 cm from the geometric center of the upper edge of the cabinet.
- the plate was heated three times in a row smoothly to different temperatures and stopped when the heating plate reached a temperature of 120 ° C (during the first heating), 130 ° C (during the second heating), 140 ° C (during the third heating). After some time after that , the cabinet door opened and was ventilated. After lowering the temperature of the plate to a temperature of approximately 39 ° C, the cabinet door was closed and heating of the plate was resumed. This procedure was repeated three times. The heating was switched off at 36, 122 and 203 minutes, and the reverse switching on at 83 and 167 minutes. The cabinet was ventilated for 49, 133 and 215 minutes.
- Fig. 8 shows that in this experiment the system worked at least three times (each time the heating was turned on). Despite the fact that with each new actuation, the released amount of gas decreased, its concentration allowed each time to confidently record overheating.
- the proposed system provides quick response and confident detection of overheating when the temperature rises to a level of about 100 ° C, including when the system is repeatedly activated.
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Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020187007035A KR102104730B1 (ko) | 2015-08-10 | 2016-08-10 | 화재 전조 상황을 신호생성하기 위한 시스템 |
EA201890487A EA035571B1 (ru) | 2015-08-10 | 2016-08-10 | Система для сигнализации предпожарной ситуации |
CN201680058862.7A CN108140290B (zh) | 2015-08-10 | 2016-08-10 | 火灾前形势信号系统 |
JP2018527715A JP6842192B2 (ja) | 2015-08-10 | 2016-08-10 | 火災前状態を知らせるためのシステム |
EP16835532.9A EP3336816A4 (en) | 2015-08-10 | 2016-08-10 | SYSTEM FOR SIGNALING A VORBRANDSITUATION |
CA3033517A CA3033517A1 (en) | 2015-08-10 | 2016-08-10 | System for signalling a pre-fire situation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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RU2015133304/12A RU2596953C1 (ru) | 2015-08-10 | 2015-08-10 | Система для сигнализации о предпожарной ситуации |
RU2015133304 | 2015-08-10 |
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WO2017026922A1 true WO2017026922A1 (ru) | 2017-02-16 |
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PCT/RU2016/000531 WO2017026922A1 (ru) | 2015-08-10 | 2016-08-10 | Система для сигнализации о предпожарной ситуации |
Country Status (8)
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EP (1) | EP3336816A4 (ru) |
JP (1) | JP6842192B2 (ru) |
KR (1) | KR102104730B1 (ru) |
CN (1) | CN108140290B (ru) |
CA (1) | CA3033517A1 (ru) |
EA (1) | EA035571B1 (ru) |
RU (1) | RU2596953C1 (ru) |
WO (1) | WO2017026922A1 (ru) |
Cited By (1)
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CN113947862A (zh) * | 2021-10-16 | 2022-01-18 | 西北工业大学 | 一种航空器电气火灾预警方法 |
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CN112358719A (zh) * | 2020-11-17 | 2021-02-12 | 安徽伊法拉电力科技有限公司 | 一种可逆热敏高压进线预警绝缘防护套料及其制备方法 |
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CN113947862B (zh) * | 2021-10-16 | 2022-12-27 | 西北工业大学 | 一种航空器电气火灾预警方法 |
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CN108140290A (zh) | 2018-06-08 |
KR20180070555A (ko) | 2018-06-26 |
EP3336816A4 (en) | 2019-05-01 |
RU2596953C1 (ru) | 2016-09-10 |
JP6842192B2 (ja) | 2021-03-17 |
EP3336816A1 (en) | 2018-06-20 |
CN108140290B (zh) | 2020-09-04 |
EA035571B1 (ru) | 2020-07-09 |
JP2018532213A (ja) | 2018-11-01 |
EA201890487A1 (ru) | 2018-11-30 |
KR102104730B1 (ko) | 2020-04-27 |
CA3033517A1 (en) | 2017-02-16 |
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