Composite fire detector special for field

Abstract

The invention relates to a field special composite fire detector which is characterized in that the composite detector is formed by adopting an infrared sensor module and a CCD component, wherein the infrared sensor module is fixed on a mounting block through compression joint; the mounting block is fixed on a box body; the upper part of the mounting block is provided with an infrared transmitting quartz glass; the infrared transmitting quartz glass is fixed on the upper part of the mounting block through a compressing block; an electronic circuit board is fixed in the box body, and an electronic circuit is arranged on the electronic circuit board; a side part of the box body is provided with an inlet connector and an outlet connector; a rain shade is arranged on the upper part of the box body, while a tripod head is arranged on the lower part of the box body. The invention can be arranged in various devices in a severe field environment with a non-contact mode, can early and rapidly detect an early fire alarm caused by temperature, overheating, sparkle, self-ignition and other reasons of the early fire, can be automatically switched to a field camera and an image visual system for a watchroom identifying a fire artificially, and can automatically adjust warning temperature, heating-up speed and sensitivity of the field special composite fire detector according to the field situation.

Description

technical field [0001] The invention relates to a composite fire detector dedicated to the field, and in particular belongs to the technical field of fire detection and alarm in safety engineering. Background technique [0002] In the prior art, the existing fire detectors applicable to large and medium-sized industrial equipment or articles in the field mainly include cable-type linear temperature-sensitive fire detectors (mainly referring to the temperature-sensitive cables of their sensitive elements, the same below), red (Ultraviolet) flame detector. The cable-type linear temperature-sensing fire detector is composed of a microcomputer head, a temperature-sensing cable and a terminal box. The red (purple) outer flame detector is composed of an optical path component, a red (purple) outer flame sensor and an electronic circuit. [0003] The main working principle of the cable-type linear temperature-sensing fire detector is that the temperature-sensing cable conductors u...

AI Technical Summary

Problems solved by technology

The above-mentioned cable-type linear temperature-sensing fire detector mainly has the following four disadvantages: 1. The temperature-sensing cable must be installed close to the surface of the protected object, so that the temperature of the protected object can be monitored in time, which causes inconvenience for on-site installation and maintenance of the protected object Inconvenient maintenance, and the temperature-sensing cable is easy to fall off and be damaged, causing the temperature-sensing cable to fail to work normally; 2. Due to the limitation of the principle, the fire alarm response time of the cable-type linear temperature-sensing fire detector is long, generally greater than 10 seconds (in the state of burning with an open flame); 3. Due to outdoor installation, the temperature-sensing cable has experienced harsh environments such as wind, rain, sun and rain, and has been exposed to ultraviolet and infrared radiation for a long time. Aging, the insulation performance is greatly reduced, and its service life is reduced; 4. For anti-static and lightning strikes, the outer sheath of the temperature-sensing cable needs to be at the same potential as the shell of the protected object, so metal braiding must be used, but if the temperature-sensing cable installation fixture falls off, In case of strong wind, the temperature-sensing cable with metal braid may fall to the high-voltage terminal of the transformer, causing major electrical accidents such as short circuit and power failure

The above-mentioned infrared (violet) flame detector mainly has the following three disadvantages: 1. Due to the need to shield the influence of ambient light, two or more reference sensors are generally used, and all electronic components are in the field environment, requiring resistance The ambient temperature level is high, so the overall cost is high; 2. Since the ambient light cannot be completely shielded, the detector is susceptible to interference. Years of application results have proved that the detector has a high false alarm rate, unstable and unreliable performance; 3. Only Detect whether the protected object emits an open flame, and does not respond at all to whether the temperature of the protected object is overheated or reaches the alarm temperature

[0005] In addition, when the above two detectors send out a fire alarm signal and output it to the fire alarm controller, the on-duty personnel generally need to go to the site of the protected object of the two detectors to confirm whether it is a real fire before starting the next step such as fire extinguishing, which will affect valuable fire extinguishing time

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