CN215182323U - Multi-criterion synergistic fire detection alarm system for power cabin of urban underground comprehensive pipe gallery - Google Patents
Multi-criterion synergistic fire detection alarm system for power cabin of urban underground comprehensive pipe gallery Download PDFInfo
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Abstract
The utility model relates to a city utility tunnel electric power cabin multi-criterion synergy fire detection alarm system, characterized by include optic fibre formula temperature-sensing detector, combination formula fire sensor, suction-type combustible gas detector, comprehensive data analysis host computer and alarm device, optic fibre formula temperature-sensing detector's temperature sensing optic fibre is laid on the piping lane cable, and combination formula fire sensor, suction-type combustible gas detector are installed on the piping lane corridor top, and optic fibre formula temperature-sensing detector host computer, combination formula fire sensor, suction-type combustible gas detector connect comprehensive data analysis host computer respectively, and alarm device is connected to comprehensive data analysis host computer. The advantages are that: according to the composite and multi-criterion concept, the optical fiber type temperature-sensing detector, the air suction type smoke detector and the suction type combustible gas detector are designed and combined in a synergistic manner, so that the defects of fire detection and prevention of the electric power cabin of the comprehensive pipe rack in China can be effectively overcome, and the basic requirements of the complex environment of the underground comprehensive pipe rack are met.
Description
Technical Field
The utility model relates to a many criteria synergetic fire detection alarm system in city utility tunnel electric power cabin belongs to fire safety technical field.
Background
The utility tunnel power cabin is an important form of a cable channel for communication, high-voltage power, intelligent weak current system signal transmission and the like, belongs to an accessory facility carrier along a line laying path, and becomes an important restriction factor for improving the intrinsic safety of an urban cable network due to multi-party operation and maintenance, fuzzy right, multiple hidden projects, insufficient effective operation and inspection means, low operation state control degree and the like. Utility tunnel electric power cabin is different from ordinary cable channel, and the cabin body buries deeply great, and the operational environment is more complicated, and the conflagration, outer broken, ponding, subside, the air is turbid, the difficult scheduling problem of illumination is more outstanding, and because phenomenons such as comdenstion water are serious in the electric power under-deck, supervisory equipment is difficult to the reliable and stable operation, and large-scale utility tunnel generally does not link to each other with the user is direct, cooperates through with simple and easy ditch etc. many, has increased the operation complexity of under-deck high tension cable line. The operation and maintenance work of the power cabin of the comprehensive pipe rack is affected by space, environment and adjacent pipelines more complicated than that of a conventional cable channel, in addition, the underground cable channel fire has the characteristics of smoldering and rapid development, and related losses are more serious if an accident happens to a cable line in the cabin. Therefore, the detection and early warning of the city underground utility tunnel electric power cabin fire disaster are researched, and the method has important significance for preventing and controlling the hazard of the utility tunnel electric power cabin fire accident.
At the end of 5 months in 2017, the ' thirteen-five ' plan for planning and constructing municipal infrastructure in cities in China ' released and implemented by the Ministry of living and construction and the State development Commission proposes that underground comprehensive pipe galleries must be synchronously constructed on newly-built roads in new cities, various gardens and areas of development in large scale, and the old cities promote the construction of the comprehensive pipe galleries according to local conditions. According to the development program, until the end of "thirteen five", the development is carried out on a scale of nearly 2000 km each year, and finally, the scale of more than 10000 km. The potential fire hazard inducing factors and types in the power cabin of the utility tunnel are more, the cable bridge is staggered in spatial layout, dead corners of blind areas exist, and a single fire detector cannot accurately detect and identify the potential fire hazard in the utility tunnel. At present, research on the synergistic design and combination of multiple fire detection alarm systems and the application of the fire detection alarm systems to urban underground comprehensive pipe galleries is still not mature enough. For example, chinese patent CN109493558A discloses an underground pipe gallery fire alarm and fire fighting system, which includes a temperature sensor, a smoke sensor and a humidity sensor, and can detect the fire of the underground pipe gallery in real time, but capture information such as cable combustion flame image, gas composition, heat flow density, flow field characteristics (such as airflow pressure difference). Obviously, the prior fire detection and early warning technology for the utility tunnel is in a starting stage, the fire detectors are used in a few types, the design concepts of combination, synergy, redundancy and the like are not fully utilized, the faults of false alarm, failure in alarm, delayed alarm and the like of the detectors are not favorably and comprehensively relieved, and the complex situation of the fire of the urban underground utility tunnel cannot be fully responded.
In addition, underground cable channel conflagration has smoldering and rapid development characteristics, and cable channel has formulated certain fire control standard on engineering design, but its main way still is in traditional artifical fire control and passive isolation stage, can only make the conflagration control in certain passageway scope to reduce the loss that the conflagration brought. Because early-stage fire early warning and exploration still have the disappearance, validity and reliability still lack system, abundant examination, and the utility tunnel internal environment is complicated, and the section loss is huge, and traditional single fire detection early warning system is difficult to satisfy utility tunnel high reliability operation and essential safety promotion requirement. At present, the comprehensive pipe gallery fire detection and early warning technology is in a starting stage, corresponding standard specifications are relatively lacked, and the research significance is great.
Disclosure of Invention
The utility model provides a city utility tunnel electric power cabin multi-criterion synergy fire detection alarm system, its aim at is more to the induction factor and the type of the pipe rack electric power under-deck conflagration hidden danger that prior art exists, latent conflagration development type is various and the degree is different, single fire detector reliability is relatively poor, the accurate defect such as the conflagration hidden danger is surveyed and the great degree of difficulty of prediction condition of a fire development scale, a city utility tunnel electric power cabin multi-criterion synergy fire detection alarm system is provided, can improve detection sensitivity, the coverage, validity and location precision, better satisfy utility tunnel electric power cabin conflagration emergence and development complexity.
The technical solution of the utility model is as follows:
city utility tunnel electric power cabin multi-criterion synergy fire detection alarm system, including optic fibre formula temperature detector 2, combination formula fire sensor 3, suction-type combustible gas detector 4, comprehensive data analysis host computer and alarm device 6, optic fibre formula temperature detector 2's temperature sensing optic fibre is laid on piping lane cable 1, and combination formula fire sensor 3, suction-type combustible gas detector 4 are installed at the piping lane roof, and optic fibre formula temperature detector host computer is connected to temperature sensing optic fibre signal output part, and optic fibre formula temperature detector host computer signal output part, combination formula fire sensor 3 signal output part, suction-type combustible gas detector 4 signal output part connect respectively comprehensive data analysis host computer signal input part, and comprehensive data analysis host computer signal output part connects alarm device 6 signal input part.
The combined fire sensor 3 comprises an air-breathing smoke detector 301, a humidity sensor 302 and a pressure sensor 303.
The temperature sensing optical fiber of the optical fiber type temperature sensing detector 2 is laid on the pipe rack cable 1 in an S shape to increase the contact area with the cable, and the optical fiber type temperature sensing detector host collects Raman scattering light in the temperature sensing optical fiber.
The suction type combustible gas detector 4 is a point type combustible gas monitoring device.
The utility model has the advantages that:
1) the existing underground pipe gallery fire fighting system is mainly used for manual isolation and passive fire fighting after fire occurs, so that loss is reduced by controlling the fire within a certain range, and the fire can be rarely discovered and controlled in the very early stage and the initial stage of the fire. According to the composite and multi-criterion concept, the multi-criterion synergistic fire detection alarm system is designed, so that the fire hidden danger is accurately detected and the fire development is predicted.
2) The existing underground pipe gallery fire detection system only uses a single fire detector, and is difficult to meet the complex layout and environment of the underground pipe gallery. This application is according to compound and the multi-criterion theory, carries out synergistic design and combination to optical fiber formula temperature detector, formula smoke detector, suction-type combustible gas detector, can improve detection sensitivity, coverage, validity and location precision, can better satisfy utility tunnel electric power cabin conflagration emergence and development complex situation, effectively supply that china's utility tunnel electric power cabin conflagration is surveyed and is prevented inadequately, can satisfy utility tunnel complex environment basic demand.
3) The optical fiber type temperature-sensing detector is paved on the pipe gallery cable in an S shape, the contact area between the optical fiber type temperature-sensing detector and the cable is increased, the temperature-sensing optical cable can reliably run in severe environments such as a tunnel and the like, and the host is installed in a monitoring room, so that the running environment is more reliable and stable; the system capacity is large, and each temperature sensing detection host can monitor a 10 km pipe gallery circuit; the temperature can be monitored and fed back on line in real time for 24 hours; the interface is simple and convenient, has multiple output modes, and meets various alarm requirements. Before a fire disaster happens, the local temperature of the cable rises, the cable is detected by the front-end optical fiber, an abnormal signal is transmitted to the optical fiber temperature sensing host, and then the host transmits the signal to the comprehensive alarm system to realize early prevention and control of the fire disaster.
Drawings
Fig. 1 is a general flow chart of underground pipe gallery fire detection alarm.
Figure 2 is a schematic structural view of a smoke detector and an infrared detector of an underground pipe gallery.
FIG. 3 is a schematic diagram of a fiber optic temperature probe.
In the figure, 1 cable, 2 optical fiber type temperature-sensing detectors, 3 combined fire sensors, 301 air-breathing smoke detectors, 302 humidity sensors, 303 pressure sensors, 4 inhalation type combustible gas detectors, 5 comprehensive pipe galleries and 6 alarm devices are arranged.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings.
As shown in the attached figures 1 and 2, the multi-criterion synergistic fire detection and alarm system for the urban underground comprehensive pipe gallery mainly comprises the following components: the fire alarm system comprises a cable 1, an optical fiber type temperature-sensing detector 2, a combined fire sensor 3, an air suction type smoke detector 301, a humidity sensor 302, a pressure sensor 303, a suction type combustible gas detector 4, a comprehensive pipe gallery 5 and an alarm device 6. The design carries out synergistic design and combination on the optical fiber type temperature-sensing detector, the infrared flame detector and the air-breathing type smoke-sensing detector according to the composite and multi-criterion concept, and realizes effective detection of the extremely early fire, the early fire and the dead angle fire, and real-time positioning and tracking of hidden danger points aiming at the sent smoldering type and open fire type fires.
First, a fiber optic temperature probe was used. The optical fiber type temperature-sensing detector is a detector for responding fire parameters around a continuous line, is also called as a linear temperature-sensing detector, 1 is a cable in a pipe gallery, and 2 is the optical fiber type temperature-sensing detector. The principle is as follows: when the light pulse is transmitted through the optical fiber, inelastic collision is generated between the light pulse and the sub-wavelength structure of the optical fiber, and Raman scattering light is generated. Among them, the laser beam having a higher frequency than the input laser beam is called an anti-stokes light, and vice versa. The anti-stokes light is sensitive to temperature and can reflect the change of the external temperature. The time of the light scattering signals returned from different physical positions of the optical fiber reaching the detector is different, the detector collects the reflected scattering light and performs photoelectric conversion and signal analysis, and the temperature information of each position of the optical fiber can be obtained. The linear optical fiber temperature-sensing fire detector mainly comprises a temperature-sensing optical fiber for field use and an optical fiber temperature-sensing detection host machine. The host collects and analyzes Raman scattering light in the temperature sensing optical fiber, and a temperature change curve of the related temperature sensing optical fiber is obtained through calculation.
When the optical fiber type temperature sensing detector is installed, in order to increase the contact area between the optical fiber type temperature sensing detector and the cable, the optical fiber type temperature sensing detector is laid on the pipe gallery cable in an S shape, as shown in the attached drawing 3, and the advantages are as follows. The design is advanced: the temperature sensing optical cable can reliably operate in severe environments such as tunnels, and the like, and the host is arranged in the monitoring room, so that the operation environment is more reliable and stable; the system capacity is large, and each temperature sensing detection host can monitor a 10 km pipe gallery circuit; the temperature can be monitored and fed back on line in real time for 24 hours; the interface is simple and convenient, has multiple output modes, and meets various alarm requirements.
Before a fire disaster happens, the local temperature of the cable rises, the cable is detected by the front-end optical fiber, an abnormal signal is transmitted to the optical fiber temperature sensing host, and then the host transmits the signal to the comprehensive alarm system to realize early prevention and control of the fire disaster.
The design installs two kinds of fire detectors, 3 combined fire sensors and 4 suction type combustible gas detectors, on the roof of the pipe gallery. Wherein, the 3 combined fire sensor is divided into the following modules: 301 aspirated smoke detection sensor, 302 humidity sensor, 303 pressure sensor, fig. 3. The smoke detection sensor can quickly detect smoke generated in the smoldering stage of the fire and send out a fire alarm signal in time. In addition, the humidity and pressure sensor module is added, the damage size of abnormal conditions can be judged according to various information, and the method has better synergy.
In the actual underground pipe gallery, the situation that the electric power cabin is adjacent to the gas cabin is not rare, and the gas leakage of the nearby gas pipeline can occur and then the gas is diffused to the electric power cabin to cause fire or even explosion, so that the suction type combustible gas alarm device is additionally arranged on the top of the electric power cabin gallery to detect and early warn CH (CH)4、H2S and other combustible gases. For a closed long and narrow comprehensive pipe gallery, a point type combustible gas monitoring device is suitable.
To sum up, this design is according to compound and the multi-criterion theory, carries out synergistic design and combination to optical fiber formula temperature detector, the formula smoke detector that breathes in, suction-type combustible gas detector, has designed a city utility tunnel electric power cabin multi-criterion synergistic fire detection alarm system, can effectively supply china's utility tunnel electric power cabin fire detection and prevention not enough, can satisfy utility tunnel complex environment basic demand.
Claims (4)
1. A multi-criterion synergistic fire detection alarm system for an electric power cabin of an urban underground comprehensive pipe gallery is characterized by comprising an optical fiber type temperature-sensing detector (2), a combined fire sensor (3), a suction type combustible gas detector (4), a comprehensive data analysis host and an alarm device (6), temperature sensing optical fiber of optic fibre formula temperature detector (2) is laid on piping lane cable (1), combination formula fire sensor (3), suction-type combustible gas detector (4) are installed on piping lane corridor roof, optic fibre formula temperature detector host computer is connected to temperature sensing optical fiber signal output part, optic fibre formula temperature detector host computer signal output part, combination formula fire sensor (3) signal output part, suction-type combustible gas detector (4) signal output part connects comprehensive data analysis host computer signal input part respectively, alarm device (6) signal input part is connected to comprehensive data analysis host computer signal output part.
2. The urban underground utility power compartment multi-criterion synergistic fire detection alarm system according to claim 1, wherein the combined fire sensor (3) comprises an air-breathing smoke detector (301), a humidity sensor (302) and a pressure sensor (303).
3. The urban underground utility tunnel power compartment multi-criterion synergistic fire detection alarm system according to claim 1, wherein the temperature-sensing optical fibers of the optical fiber type temperature-sensing detector (2) are laid on the pipe rack cable (1) in an S shape to increase the contact area with the cable, and the optical fiber type temperature-sensing detector host collects Raman scattered light in the temperature-sensing optical fibers.
4. The urban underground utility tunnel power compartment multi-criterion synergistic fire detection alarm system as claimed in claim 1, wherein the suction type combustible gas detector (4) is a point type combustible gas monitoring device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114360190A (en) * | 2021-12-31 | 2022-04-15 | 上海震旦施密茨消防装备有限公司 | Fire alarm system for underground cable and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114360190A (en) * | 2021-12-31 | 2022-04-15 | 上海震旦施密茨消防装备有限公司 | Fire alarm system for underground cable and working method thereof |
| CN114360190B (en) * | 2021-12-31 | 2024-03-22 | 上海震旦施密茨消防装备有限公司 | Fire alarm system for underground cable and working method thereof |
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