Multi-signal irrecoverable cable type linear temperature-sensing fire detector

Abstract

The invention relates to a multi-signal irrecoverable cable type linear temperature-sensing fire detector, comprising a signal processing unit, a terminal box and a sensitive component. One end of thesensitive component is electrically connected with the terminal box, and the other end of the sensitive component is electrically connected with the signal processing unit; the sensitive component isa temperature sensitive cable, and the temperature sensitive cable includes a first conductive core, a second conductive core, and a third conductive core; and the terminal box is internally providedwith a first resistor and a second resistor; a soluble insulating layer is wrapped around the outer periphery of each of the first conductive wire core, the second conductive wire core and the thirdconductive wire core, a shielding layer is wrapped around the outer circumference of the three conductive cores, and an insulating outer sheath is disposed on the shielding layer; at least one of thethree conductive cores is an elastic conductor, and every two conductive cores are separated by the soluble insulating layers. The invention can effectively detect the conductor short-circuit situation of the sensitive part of the temperature-sensing fire detector and send a short-circuit alarm signal in time.

Description

technical field [0001] The invention relates to the technical field of fire detection and alarm in the discipline of safety engineering, in particular to a multi-signal non-recoverable cable-type linear temperature-sensing fire detector. Background technique [0002] The fire detector is the equipment used in the automatic fire alarm system to detect the scene and find the fire. The fire detector is the "sensory organ" of the system, and its function is to monitor whether there is a fire in the environment. Once there is a fire, the characteristic physical quantities of the fire, such as temperature, smoke, gas and radiant light intensity, are converted into electrical signals, and immediately act to send an alarm signal to the fire alarm controller. [0003] In the traditional non-recoverable cable-type temperature-sensitive fire detector, when the temperature-sensing component is heated and reaches the alarm threshold, its soluble insulating layer melts, and the elastic c...

AI Technical Summary

Problems solved by technology

This kind of alarm method cannot meet the requirements of the new national standard for two-to-two short circuit fault reporting of the sensitive parts of the cable-type linear temperature-sensitive fire detector.

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