Fire alarm system of vault oil storage tank based on distributed optical fiber temperature sensing technology
A technology of fire alarm system and distributed optical fiber, which is applied in the direction of electric fire alarm, signal transmission system, non-electrical signal transmission system, etc. It can solve the problem of failure to detect and alarm in time, high maintenance cost and difficulty, and false alarm Large hidden dangers and other problems, to achieve the effect of convenient laying, high cost performance and low false alarm rate
Active Publication Date: 2020-11-20
PETROCHINA CO LTD +1
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Problems solved by technology
When the temperature is abnormal in the area between the two gratings, it will not be detected and alarmed in time, and the hidden danger of false alarm is great
In addition, since the grating requires special processing and packaging of the optical fiber, it has certain requirements on the process, so the cost is relatively high. Once the grating is damaged, it needs to be replaced and re-calibrated, and the maintenance cost and difficulty are high.
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] Such as figure 1 As shown, a vault oil storage tank fire alarm system based on distributed optical fiber temperature sensing technology includes: distributed optical fiber line-type temperature-sensitive fire detector 1, optical cable terminal box 2, optical cable fusion box 3, and optical fiber jumper wire 4 , the first transmission optical cable 5 , the second transmission optical cable 6 , and the temperature-sensing optical cable 7 .
[0030] Distr...
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The invention discloses a vault oil storage tank fire alarm system based on a distributed optical fiber temperature sensing technology. The vault oil storage tank fire alarm system comprises a distributed optical fiber line type temperature sensing fire detector, an optical fiber patch cord, an optical fiber termination box, an optical fiber splicing box, a temperature sensing optical cable and the like. The distributed optical fiber line type temperature sensing fire detector transfers a light signal to the temperature sensing optical cable of each to-be-monitored vault oil storage tank through a first transmission optical cable and a second transmission optical cable; the temperature sensing optical cables are mounted along the primary sealing ring of the vault oil storage tanks. The backward Raman scattered light generated in the temperature sensing optical cables is modulated by the temperature information near the primary sealing rings of the vault oil storage tanks. The distributed optical fiber line type temperature sensing fire detector finishes demodulation of the Raman scattered light, and can monitor the temperature of each point along the primary sealing rings of the vault oil storage tanks in real time and upload the temperature data to a server. The system disclosed by the invention is suitable for the fire monitoring of vault oil storage tanks and has the advantages of safety and passivity, corrosion resistance, electromagnetic interference resistance and the like.
Description
technical field [0001] The invention belongs to the field of optical fiber sensing, in particular to a fire alarm system for vault oil storage tanks based on distributed optical fiber temperature sensing technology. Background technique [0002] With the development of my country's petroleum industry and the increase of crude oil and refined oil reserves, there are more and more large domestic oil depots and oil tanks. Large oil storage tanks and gas storage tanks in these petroleum and petrochemical industries are often arranged in large numbers. Due to the large number of oil tanks, the number of equipment and valves to be controlled, the operation time is long, and the process is complicated. The original manual operation is prone to misoperation, and the safety of the oil tank area is difficult to guarantee. Fuel oil stored in oil tanks is a flammable, explosive and dangerous chemical, which is very prone to accidents, especially major catastrophic industrial accidents....
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IPC IPC(8): G08B17/06G08C23/06
CPCG08B17/06G08C23/06
Inventor 杨永健朱晓非李艳霞石云山罗辉杜瑞杨潇君
Owner PETROCHINA CO LTD