JPS6396814A - Fire breakout point detection line - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to fire occurrence (including abnormal temperature occurrence, the same applies hereinafter).
and a line for detecting the location of a fire.

Hitherto, smoke detectors and detectors using bimetals, etc. have been widely used for fire detection, and as shown in FIG. A structure in which two wire cores are arranged in a single arrangement or twisted together, and a sheath 14 is placed over the wire cores via a tape winding layer 13 is used.

[Problems to be solved by the invention] Conventional fire detectors using smoke detectors, bimetals, etc. detect fires in limited areas, and in order to detect fires over a wide area, However, many detectors had to be installed, which caused problems in terms of economics and installation time.Also, people had to go to the installation location, and space was also limited.

On the other hand, the abnormal temperature detection line only issues an alarm or the like when the temperature reaches an abnormal level, and it is unclear where on the installed detection line the abnormal temperature rise has occurred.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a linear sensor that can detect a fire and detect the location of a fire at the same time.

[Means for Solving the Problems] The gist of the present invention is to provide one refractory wire core having a refractory layer and an insulator made of a thermoplastic resin on a conductor, and at least one refractory wire core having a refractory layer and an insulator made of a thermoplastic resin on the conductor. The fire occurrence point detection wire is made by arranging or twisting a total of three wire cores, including two normal wire cores, in parallel or twisting them together, applying a fireproof layer thereon, and covering the sheath over the wire cores.

[Function] The thermoplastic insulator melts at the location of the fire, causing a short circuit between the two conductors of the normal wire cores, allowing current to flow through the circuit and operating the galvanometer, allowing the detection of a fire. On the other hand, since the conductor of the refractory core is always sound, a bridge circuit is formed, and by balancing this bridge, the location of a fire can be detected.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. 1st
The figure shows a total of one refractory wire core with refractory Y/J 2 and thermoplastic resin insulator 3 on conductor 1, and two normal wire cores with thermal nJ plastic insulator 3 on conductor 4.5L. A cross-sectional view showing a fire detection line with a structure in which three wire cores are arranged in parallel or twisted together, a fireproof layer 2 is applied thereon, and a sheath 6 is further placed on top of it. One refractory wire core having a refractory layer 2 and a thermoplastic resin insulator 3 on the conductor 4, one normal wire core having a thermoplastic resin insulator 3 on the conductor 4, and one wire core consisting only of the conductor 5. It is a cross-sectional view, not showing the fire occurrence point detection line, of a structure in which a total of three wire cores are arranged in parallel or twisted together, a fireproof layer 2 is applied thereon, and a sheath 6 is further covered thereon. Such a detection line is laid on the ceiling of an underground mall or a building, and conductor 1 and conductor 4 are connected at the end. Then, connect the other end to the bridge as shown in Figure 3.

If a fire breaks out at a certain location, the thermoplastic insulator 3 applied to the conductor 4 will melt, causing a short circuit between the conductor 4 and the conductor 5. This causes current to flow through this circuit, causing the galvanometer 8 to operate and detect the occurrence of a fire.

On the other hand, since the conductor 1 is always sound, a bridge circuit is formed at the same time, so by balancing this bridge using, for example, the Murray-Lube method, it is possible to detect a short circuit, that is, a fire outbreak point. It is possible. Also,
By constructing a circuit as shown in Figure 5, the occurrence of a fire can be detected by the operation of the ammeter 9 or 10 at the location where the fire has occurred (
Detection of short-circuit points) can be performed by the ratio of the readings of the ammeter 9.10.

Furthermore, by using a material with a low temperature coefficient of resistance (for example, manganin, nickel-free manganin, etc.) for the conductor 1.4, changes in conductor resistance near the location of a fire can be suppressed, allowing for more accurate detection of the location of a fire. becomes.

In addition, by coloring the sheath and installing it on the ceiling, it can also be used as a passage guide guide.

[Effects of the Invention] As explained above, according to the present invention, it is possible to simultaneously detect the occurrence of a fire and the location where the fire has occurred, and by functioning as a linear sensor, it is possible to continuously monitor a wide range. There are no space problems during installation, and it can be installed in narrow spaces where people cannot enter, and the construction period can be significantly shortened.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing embodiments of the present invention, and Figures 3 and 4.
The figure is an explanatory diagram for explaining the effect when the detection line of the present invention is installed, and FIG. 5 is a cross-sectional view showing a conventional abnormal temperature detection line. 1: Conductor, 2: Fireproof layer, 3: Insulator, 4.5: Conductor, 6: Sheath, A, 8: Galvanometer, 9.10: Ammeter, 11: Conductor, 12: Insulator , 13: tape, 14: sheath. Military 11 1: Indication of 1 case of personal injury (voluntary) 1988 Patent Application No. 242270
Month 2 Name of the invention Fire occurrence point detection line 3 Person making the correction 5 Figure 3 of the drawing to be corrected. 6. A separate sheet for each amendment. 7 Drawing showing Figure 3 after the revised list of attached documents 1 or more copies Upper ivy 3 copies

Claims (1)

[Claims] (1) A total of three wires: one refractory core with a fireproof layer and thermoplastic resin insulator on the conductor, and two normal wire cores with at least one conductor having a thermoplastic resin insulator. A fire detection line consisting of cores arranged in parallel or twisted together, a fireproof layer applied thereon, and a sheath placed on top of it.