Low-voltage electric fire prevention and detection device

Abstract

The invention discloses a low-voltage electric fire prevention and detection device, which mainly comprises at least one group of detection cables (10), a capacitor C and a multi-path intelligent detector (11), wherein each detection cable (10) consists of a heat-shrinkable bush (1), two metal wires (2) and an isolating plastic tube (3); the two metal wires (2) are arranged in the isolating plastic tube (3) side by side; a cavity (4) is reserved between the two metal wires (2); the isolating plastic tube (3) is wrapped by the heat-shrinkable bush (1); the multi-path intelligent detector (11) is connected to one end of each group of detection cables (10); and the other end of each group of detection cables (10) is connected with the capacitor C to form a loop to detect the quality of the detection cables (10). According to the low-voltage electric fire prevention and detection device, the heat-shrinkable bush with high cost performance is used as a heat sensor; the low-voltage electric fire prevention and detection device is suitable for fault detection of a low-voltage electric system; accurate detection of a fault point can be realized; and the low-voltage electric fire prevention and detection device has the advantages of low manufacturing cost, simplicity, easiness, safety, reliability and capability of effectively preventing occurrence of low-voltage electric fire.

Description

technical field [0001] The invention relates to the field of fire detection equipment for low-voltage power supply systems, in particular to a device for realizing fire prevention and detection by applying heat shrinkable tube technology. Background technique [0002] The fire caused by electrical circuit fault is one of the most important causes of fire. How to effectively detect low-voltage electrical circuit faults has become an important content in the field of fire detection and prevention. [0003] We know: 1) After the current delivered by the low-voltage power supply line exceeds the rated current value, the power supply line will generate a higher temperature, and even melt the insulating layer on its outer surface to cause a short circuit, and even generate high temperature and arc, causing a fire. 2) There are many electrical connectors on the low-voltage power distribution side. When these connectors are used for a long time, "poor contact" may occur, resulting i...

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Problems solved by technology

[0003] We know: 1) After the current delivered by the low-voltage power supply line exceeds the rated current value, the power supply line will generate a higher temperature, and even melt the insulating layer on its outer surface to cause a short circuit, and even generate high temperature and arc, causing a fire

2) There are many electrical connectors on the low-voltage power distribution side. When these connectors are used for a long time, "poor contact" may occur, resulting in high temperature and electric sparks at the connectors, which is one of the causes of electrical fires

[0005] 1) Install probes such as thermistors and temperature sensors on the power supply cable to generate an alarm signal after a certain temperature is detected. This method has certain defects: A. The sensor is an active device and needs to be provided with working power; B , The m

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