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Analog linear temperature-sensing fire detecting cable based on PTC characteristic barrier layer

A technology of fire detection and analog quantity, which is applied to fire alarms with electric effects, thermometers and cables with electric/magnetic elements that are directly sensitive to heat, and can solve the problems of reliability and sensitivity of detectors, high cost, Complex structure and other issues to achieve the effect of improving reliability and service length

Inactive Publication Date: 2007-04-04
SURELAND IND FIRE SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, the NTC material layer analog linear temperature-sensitive detector in the prior art cannot be eliminated, which will have an

Method used

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  • Analog linear temperature-sensing fire detecting cable based on PTC characteristic barrier layer
  • Analog linear temperature-sensing fire detecting cable based on PTC characteristic barrier layer
  • Analog linear temperature-sensing fire detecting cable based on PTC characteristic barrier layer

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Embodiment Construction

[0018] Referring to Fig. 1 (longitudinal sectional view), the analog linear temperature-sensitive fire detection cable of the present invention is an important detection element of the analog linear temperature-sensitive fire detector, and the detection cable has two large lengths for collecting fire signals The detection conductors 1 and 2, the PTC characteristic barrier layer 3 is set between the two detection conductors, the length of the PTC characteristic barrier layer corresponds to the length of the detection conductor (the specific length can refer to the conventional insulation layer length), so The two detection conductors described above are mounted together in parallel. One end of the detection conductor is provided with an output terminal that can be electrically connected with an electrical signal measuring device. Parallel in the present invention means: two detection conductors are either parallel to each other, or intertwined (one is wound around the other or ...

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Abstract

This invention is to open a linear thermo-sensor fire alarm cable with PTC insulation layer. The PTC insulation layer is fixed in between two long probes in parallel. Recoverable character of PTC with decreasing temperature allows the alarm to resume to original status after alarming when the temperature resumed.

Description

technical field [0001] The invention relates to an analog quantity line type temperature-sensitive fire detection cable based on a PTC characteristic barrier layer. A PTC characteristic barrier layer with a positive temperature coefficient is arranged between a pair of detection conductors. When a certain section of the detection cable is heated, the PTC characteristic The resistance value of the barrier layer increases, which causes the resistance change between the detection conductors, and the fire alarm is given according to the change size or the change rate of the resistance value. Background technique [0002] Chinese patent ZL03242897.9 discloses a sensing cable and a temperature-sensitive detector composed of the sensing cable. The sensing cable is composed of a metal wire, a glass fiber tape impregnated with a Composed of vinyl fluoride film, glass fiber tapes coated on the outside of the paired two metal wires, the metal wires coated with glass fiber tapes are twi...

Claims

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Application Information

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IPC IPC(8): G08B17/06G01K7/00H01B7/00
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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