WO2008031310A1 - Détecteur d'incendie à détection de température linéaire non renouvelable pour alarme à circuit ouvert - Google Patents

Détecteur d'incendie à détection de température linéaire non renouvelable pour alarme à circuit ouvert Download PDF

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Publication number
WO2008031310A1
WO2008031310A1 PCT/CN2007/001574 CN2007001574W WO2008031310A1 WO 2008031310 A1 WO2008031310 A1 WO 2008031310A1 CN 2007001574 W CN2007001574 W CN 2007001574W WO 2008031310 A1 WO2008031310 A1 WO 2008031310A1
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WO
WIPO (PCT)
Prior art keywords
detecting
conductor
conductors
fusible
cable
Prior art date
Application number
PCT/CN2007/001574
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English (en)
Chinese (zh)
Inventor
Weishe Zhang
Gangjin Li
Original Assignee
Weishe Zhang
Gangjin Li
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weishe Zhang, Gangjin Li filed Critical Weishe Zhang
Publication of WO2008031310A1 publication Critical patent/WO2008031310A1/fr

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Classifications

    • 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

Definitions

  • the utility model relates to an unrecoverable linear temperature sensing fire detector with an open circuit alarm. At least one of the detecting conductors of the linear type temperature detecting fire detector adopts a fusible conductor, and uses the principle of "breaking" to report a fire alarm or an auxiliary fire alarm.
  • FIG. 1 and FIG. 2 show the structure of the existing non-recoverable line type heat detector.
  • the detector there is an outer sheath 1 in which two (or three, four) elastic conductors 3 are twisted together, and the outer surface of the detecting conductor is covered with a meltable material 2 of a certain melting point.
  • the detecting cable is heated, the temperature can reach a certain degree, and then melt soften or melt.
  • the detecting conductors are in contact with each other, that is, a short circuit occurs, thereby achieving the purpose of fire alarm. After the probe conductor is broken, the detector reports a fault.
  • the advantages of this type of detector are: When the temperature of any point on the detection cable reaches the set alarm temperature, the detection cable can be short-circuited.
  • the sensitivity of the detector alarm is independent of the length of the heat. Therefore, local overheating of the protected object occurs.
  • the detection sensitivity of fires caused by external fire sources is very high.
  • the disadvantage is that the elastic conductor or the memory alloy wire in the temperature detector is in the environment of the alarm temperature under normal conditions, or is subjected to mechanical external force during installation and use, and the short circuit between the probe conductors is prone to occur. This caused a false alarm fire.
  • an irreversible linear temperature fire with an open circuit alarm is proposed. detector.
  • the purpose of the utility model is to provide an unrecoverable line type temperature sensitive fire detector with an open circuit alarm, wherein at least one of the detecting elements of the line type temperature sensing fire detector uses a fusible conductor, and the design of the fusing temperature thereof The value can be set within a range of 45 ⁇ to 280 ,. When the ambient temperature of the protected object exceeds this design value, the heated portion of the fusible conductor melts, and under the surface tension, the circuit formed by the detecting conductor is permanently cut off. The fire detector sends an alarm signal according to the "open circuit" status.
  • an unrecoverable linear temperature sensing fire detector with an open circuit alarm comprising two detecting conductors, an insulating layer and a conversion box, wherein the two detecting conductors are in parallel
  • the at least one detecting conductor of the detecting conductor is a fusible conductor
  • the insulating layer is disposed between the two detecting conductors, and the first ends of the two detecting conductors are respectively electrically connected to the input end of the converter box.
  • a resistor is connected in series between the two detecting conductors, and the resistor is connected in series at the tail ends of the two detecting conductors, and the fusible conductor has a fusing temperature ranging from 45 ° C to 280 ° C.
  • an unrecoverable line type temperature sensitive fire detector with an open circuit alarm comprising a detecting conductor, an insulating layer, a conversion box, and a pair of said detecting conductors arranged in parallel Detecting the cable A, the other pair of the detector conductors disposed in parallel constitute the probe cable B, and the probe cable A and the probe cable B are arranged in parallel to form a composite probe cable; At least one of the detecting conductors is a fusible conductor, and the insulating layer is disposed between the two detecting conductors, and the first ends of the two detecting conductors are respectively electrically connected to the input end of the converter box, and the two detecting conductors are respectively There is a resistor connected in series, the resistor is connected in series at the tail end of the two detecting conductors, and the fusible conductor has a fusing temperature range of 45O ⁇ 28 (TC; two detecting conductors in the detecting cable B
  • an unrecoverable line type temperature sensitive fire detector with an open circuit alarm comprising a detecting conductor, an insulating layer, a conversion box, and a pair of parallel detecting probes for detecting a cable A; at least one of the detecting conductors A is a fusible conductor, and the insulating layer is disposed between the two detecting conductors, and the first ends of the two detecting conductors are respectively input to the converter box Electrically connected, a resistor is connected in series between the two detecting conductors, the resistor is connected in series at the tail ends of the two detecting conductors, and the fusible conductor has a fusing temperature range of 45 t ⁇ 280; One of the detecting conductors of the cable A is disposed as a common conductor, and another detecting conductor of equal length and matching is disposed in parallel with the common conductor, and a fusible insulating layer is disposed between the detecting conductor and the
  • the probe cable A and the probe cable B constitute a composite probe cable; the first end of one of the probe cables B and the switch box input Electrically connecting the detection conductor to detect a cable B is shared between the conductor and a series resistor, the series resistor at the end of the detection conductors and the common conductor.
  • the utility model adopts a fusible conductor as a detecting conductor, the transmission performance of the fusible conductor is good at a normal temperature, and once it exceeds the melting temperature value, the detecting cable is "opened” under the action of the tension, and the sense is The warm fire detector emits a fire alarm signal according to the "open circuit" state.
  • FIG. Schematic diagram of the existing non-recoverable linear heat detector Figure 2.
  • Cross-sectional view of the existing non-recoverable linear temperature fire detector cross-sectional view of Figure 1
  • Figure 3 Schematic diagram of the linear temperature fire detector of the present invention
  • Figure 5 is a schematic view showing the structure of the second embodiment of the present invention.
  • Figure 6. Cross-sectional view of the second embodiment of the present invention (cross-sectional view of Figure 5.)
  • Figure 7. Schematic diagram of the third embodiment of the present invention
  • Figure 10 is a cross-sectional view of the fourth embodiment of the present invention (cross-sectional view of Figure 9)
  • the line type temperature-sensing fire detector of the present invention belongs to a non-recoverable line type temperature-sensing fire detector of an open circuit alarm, and includes two detecting conductors, an insulating layer 5, and a conversion box 8.
  • the two detecting conductors 6, 7 are arranged in parallel, one of the detecting conductors is a fusible conductor, and an insulating layer is disposed between the two detecting conductors, and the head ends of the two detecting conductors are respectively
  • the input end of the converter box is electrically connected, and a resistor 4 is connected in series between the two detecting conductors, and the resistor is connected in series at the tail end of the two detecting conductors (connected according to a conventional connection standard), and the resistance of the resistor is 0 ⁇ 20 ⁇ ⁇ , the optimum value is between 1 ⁇ ⁇ 1 ⁇ ⁇ , (when the resistance value is 0, the resistor can be canceled).
  • the detecting conductor 6 is a fusible conductor, and the fusible conductor has a fusing temperature range of 45° (: ⁇ 280 ° C.
  • the fusible conductor may be a fusible alloy wire or an organic
  • the conductive plastic wire may also be composed of a plurality of conductors connected end to end in sequence, and all the connection points in the fusible conductor are welded using a fusible alloy solder.
  • a fusible alloy wire is used as a fusible conductor.
  • the fusible alloy wire and the fusible alloy solder are all conventional products on the market.
  • the parallel arrangement of the detecting conductors means that the detecting conductors 6, 7 are spirally twisted (wound) together, or one is wound around another.
  • One detecting cable is formed on one of the above.
  • the detecting conductors 6, 7 can also be arranged together by a coaxial structure or by a parallel structure.
  • the conversion box can also be called an electrical signal measuring device, which belongs to the conventional technology. , for measuring the resistance change and the open circuit between the two detecting conductors.
  • the fusible conductor is a continuous conductor, and the fusible conductor 6 forms a conduction circuit with the detecting conductor 7 and the resistor.
  • the conventional temperature range designed in this embodiment is - 20 ⁇ 45 ⁇ , when the linear type heat detector of the present invention is heated, the temperature of the fusible conductor rises. When the temperature reaches the melting temperature of the fusible conductor 6 and above, the heated portion melts under the surface tension.
  • the circuit formed by the detecting conductor is permanently cut off, and the "breaking" condition between the detecting conductors 6, 7 is detected by the conversion box of the linear type thermal fire detector to perform a fire alarm and lose Fire alarm signal.
  • the manner in which the insulating layer is disposed between the two detecting conductors may be the structure shown in Fig. 4, or a conventional structure may be employed, that is, each of the detecting conductors is respectively covered with an insulating layer.
  • embodiment 2 of the present invention is an improvement on the basis of the first embodiment.
  • an insulating sheath 9 is additionally coated on the outside of the two detecting conductors, and the insulating layer is insulated.
  • the jacket is used to insulate from the outside.
  • the two probe conductors can also be wound together in a helically twisted manner with a winding pitch of less than 1500 mm (not shown).
  • the length of the probe conductor can be 'designed from 50 meters to 200 meters.
  • a third embodiment of the present invention is an improvement on the basis of the first embodiment.
  • the embodiment includes a detecting conductor, an insulating layer, a conversion box, and a pair of detecting conductors arranged in parallel. 12, 13 constitute a probe cable A, and another pair of probe conductors 10, 11 arranged in parallel constitute a probe cable B, and the probe cable A and the probe cable B are arranged in parallel to form a composite probe cable.
  • the detecting conductor 12 in the detecting cable A is a fusible conductor, and the insulating layer 14 is disposed between the two detecting conductors, and the first ends of the two detecting conductors are respectively electrically connected to the input end of the converter box 18, A resistor 17 is connected in series between the two detecting conductors, and the resistor is connected in series at the tail end of the two detecting conductors, and the fusible conductor has a fusing temperature range of 45 ° C to 28 (TC.
  • the first ends of the two detecting conductors in the cable B are respectively electrically connected to the input end of the converter box 18, and a resistor 16 is connected in series between the two detecting conductors, and the resistor is connected in series at the tail of the two detecting conductors.
  • the fusible insulating layer 15 is disposed between the two detecting conductors, and the fusible insulating layer (also referred to as a meltable insulating layer) may be coated with wax, naphthoquinone, stearic acid, crystal rose, PE plastic.
  • the thickness of the fusible insulating layer can be selected between 0. 1-2 mm.
  • the conversion box is used to detect the "open circuit” or “circuit” of the two circuits of the detecting cable A and the detecting cable B. Short circuit" situation.
  • the linear temperature sensing cable When a fire occurs, the linear temperature sensing cable generates a fire.
  • the temperature When the temperature is heated, the temperature rises accordingly.
  • the resistance between the two detecting conductors is constant; when the heated temperature continues to rise, the softening temperature of the fusible insulating layer is reached.
  • the fusible insulating layer is melted (or softened), and under the elastic force between the two detecting conductors, the detecting conductors 10, 11 in the detecting cable B are "short-circuited" (this is the working principle of the prior art, not Detailed description)
  • the heating temperature is higher than the operating temperature of the detecting cable A, that is, when the temperature reaches the melting temperature of the detecting conductor 12 and above, the heated portion is melted, and under the surface tension, the detecting conductors 12, 13 and The circuit formed by the resistor 17 is permanently cut off, and the "break" condition between the probe conductors 12, 13 is detected by the converter box 18 of the line type thermal fire detector to be logically related to the "short circuit" signal of the probe cable B.
  • the detection cable A and the detection cable B may The event of a “short” or simultaneous “break” In the case, it is also possible to detect a “short circuit” or “open circuit” condition of one of the cables A and B. At this time, the line type temperature-sensing fire detecting detector reports only the fault through the switch box, and does not report the fire.
  • the fusible conductor for the detecting conductor 12 may be one of a fusible alloy conductive wire, a wire formed by welding a fusible alloy in sections, and an organic conductive plastic.
  • the wire formed by welding the fusible alloy means that the fusible conductor is composed of a plurality of conductors connected end to end, and all the connection points in the fusible conductor are welded by fusible alloy solder, the fusible alloy
  • the design of the fusing temperature is 45 ⁇ to 280 °C.
  • the manner in which the insulating layer or the fusible insulating layer is disposed between the two detecting conductors may be the structure shown in FIG. 8, or a conventional structure may be adopted, that is, each detecting conductor is respectively covered with an insulating layer or may be Melt the insulation layer.
  • the detection cable A and the detection cable B may be arranged in the same manner as shown in FIG. 8, or may be stacked one on another, or one of the conventional methods.
  • an outer sheath may be coated on the outside of the detecting cable A and the detecting cable B, which is not shown in the drawing.
  • the detector of the fourth embodiment of the present invention is an improvement on the basis of the third embodiment, and can also be regarded as a modified product of the third embodiment.
  • a pair of probe conductors disposed in parallel constitutes the probe cable A; one of the probe conductors 19 is a fusible conductor, and the insulating layer 14 is disposed between the two probe conductors 19, 20.
  • the first ends of the two detecting conductors are respectively electrically connected to the input end of the converter box 18, and a resistor 17 is connected in series between the two detecting conductors, and the resistor is connected in series at the tail end of the two detecting conductors.
  • the fusing conductor has a fusing temperature range of 45'C to 28 (TC; one of the detecting conductors 20 in the detecting cable A is set as a common conductor, and another detecting conductor 21 of the same length and matching is arranged in parallel with the common conductor.
  • a fusible insulating layer 15 (also referred to as a fused insulating layer) is disposed between the detecting conductor and the common conductor to form a detecting cable B; the detecting cable A and the detecting cable B constitute a composite detecting cable
  • the first end of one of the detecting conductors B is electrically connected to the input end of the converter box, and a resistor 16 is connected in series between the detecting conductor 21 and the common conductor 20, the resistor string Connected in said The trailing ends of the detecting conductor and the common conductor.
  • At least one of the detecting conductor 20 and the detecting conductor 21 is an elastic conductor or a memory alloy wire.
  • the insulating layer or the fusible insulating layer is disposed between the two detecting conductors in the manner shown in FIG. 10, or the conventional structure may be used, that is, each detecting conductor is respectively covered with an insulating layer or may be Melt the insulation layer.
  • the fusible conductive wire may be a continuous fusible alloy conductive wire; or may be a length of 0. 2 ⁇ 1 m of multi-section wire welded with a fusible alloy; or may be a meltable organic conductive plastic The wire, the organic conductive plastic wire can be melted in the range of 40 to 200 °C.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)

Abstract

La présente invention concerne un détecteur d'incendie à détection de température linéaire non renouvelable pour alarme à circuit ouvert comportant deux conducteurs de détection, une couche d'isolation et un boîtier de conversion. Lesdits deux conducteurs de détection sont disposés en parallèle. Au moins un desdits deux conducteurs de détection est un conducteur fusible. La couche d'isolation est disposée entre lesdits deux conducteurs de détection. Les extrémités avant desdits conducteurs de détection sont en liaison électrique avec le boîtier de conversion. Une résistance est connectée en série aux extrémités arrière desdits conducteurs de détection. La plage de température de fusion dudit conducteur fusible est comprise entre 45°C et 280°C.
PCT/CN2007/001574 2006-09-08 2007-05-15 Détecteur d'incendie à détection de température linéaire non renouvelable pour alarme à circuit ouvert WO2008031310A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200620139274.X 2006-09-08
CNU200620139274XU CN200956191Y (zh) 2006-09-08 2006-09-08 一种断路报警的不可恢复式线型感温火灾探测器

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WO2008031310A1 true WO2008031310A1 (fr) 2008-03-20

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PCT/CN2007/001574 WO2008031310A1 (fr) 2006-09-08 2007-05-15 Détecteur d'incendie à détection de température linéaire non renouvelable pour alarme à circuit ouvert

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WO (1) WO2008031310A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101138669B (zh) * 2006-09-08 2012-08-29 首安工业消防有限公司 一种断路报警的不可恢复式线型感温火灾探测器
CN109979146A (zh) * 2019-04-17 2019-07-05 宋天诣 一种利用固体导电材料熔点固定特性的高温安全预警装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774184A (en) * 1971-11-24 1973-11-20 D Scarelli Heat responsive cable assembly
US4157526A (en) * 1977-02-22 1979-06-05 Davies John S Multi-stage heat sensing cable and emergency communication system
CN86207485U (zh) * 1986-10-23 1987-11-11 青岛市公安科学技术研究所 多熔点式火险报警导线
CN2200824Y (zh) * 1993-06-28 1995-06-14 陈盛铨 导线或导体的面之间的短路、断路警报器
JPH1186165A (ja) * 1997-09-02 1999-03-30 Hitachi Cable Ltd 火災予防警報装置
CN2773650Y (zh) * 2004-12-27 2006-04-19 首安工业消防股份有限公司 双预警线型感温火灾探测器
CN2812145Y (zh) * 2005-08-08 2006-08-30 张卫社 一种复合式模拟量线型感温探测器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774184A (en) * 1971-11-24 1973-11-20 D Scarelli Heat responsive cable assembly
US4157526A (en) * 1977-02-22 1979-06-05 Davies John S Multi-stage heat sensing cable and emergency communication system
CN86207485U (zh) * 1986-10-23 1987-11-11 青岛市公安科学技术研究所 多熔点式火险报警导线
CN2200824Y (zh) * 1993-06-28 1995-06-14 陈盛铨 导线或导体的面之间的短路、断路警报器
JPH1186165A (ja) * 1997-09-02 1999-03-30 Hitachi Cable Ltd 火災予防警報装置
CN2773650Y (zh) * 2004-12-27 2006-04-19 首安工业消防股份有限公司 双预警线型感温火灾探测器
CN2812145Y (zh) * 2005-08-08 2006-08-30 张卫社 一种复合式模拟量线型感温探测器

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