CN213934243U - Distributed optical fiber sensing oil gas storage tank fire monitoring device - Google Patents
Distributed optical fiber sensing oil gas storage tank fire monitoring device Download PDFInfo
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- CN213934243U CN213934243U CN202022385540.XU CN202022385540U CN213934243U CN 213934243 U CN213934243 U CN 213934243U CN 202022385540 U CN202022385540 U CN 202022385540U CN 213934243 U CN213934243 U CN 213934243U
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Abstract
The utility model belongs to the field of fire monitoring, in particular to a distributed optical fiber sensing oil gas storage tank fire monitoring device, a first distributed optical fiber sensing device host and a second distributed optical fiber sensing device host are respectively connected with different fiber cores in the same temperature sensing optical cable, and the temperature sensing optical cables are wound on two oil gas storage tanks; the first distributed optical fiber sensing device host and the second distributed optical fiber sensing device host are core units of the distributed optical fiber sensing oil-gas storage tank fire monitoring device, so that sending of excitation light pulses, collection and preprocessing of backward Raman scattering signals and uploading of preprocessed temperature data are realized; the temperature sensing optical cable is a sensing and transmitting unit of the system and is used for sensing and transmitting temperature field information along the optical cable. Each oil gas storage tank of the device is simultaneously monitored by two DTSs in a normal state, and based on comprehensive processing of temperature data in an overlapping area, mutual correction of measured data of the whole sensing system can be realized, and the reliability of long-term operation of the system is improved.
Description
Technical Field
The utility model belongs to the fire monitoring field, in particular to distributing type optical fiber sensing oil gas storage tank fire monitoring devices.
Background
The material that petrochemical industry storage tank district was stored is mainly combustible, flammable liquid such as oil, chemicals and liquefied gas, and combustible liquid easily fires the burning, and has evaporability, thermal expansion nature, trickling nature, in case the accident takes place, easily forms large tracts of land conflagration, and lower consequently is indispensable to the safety monitoring of oil gas storage tank. Conventional fiber grating detection, equivalent to a series of sensors, has one broken and the entire detection is interrupted. The detection optical cable needs to be laid at the top of the oil gas storage tank, and is exposed to the high-temperature and insolation environment for a long time, if the oil gas storage tank is a floating roof oil storage gas storage tank, the detection optical cable still needs to move up and down along with the floating roof of the large tank, and the environment is harsh and changeable. Therefore, how to continuously monitor the whole monitoring system for a long time and ensure the reliability of the system is a problem which needs to be solved urgently in the current engineering application.
SUMMERY OF THE UTILITY MODEL
For the monitoring that solves and mention in the background art lasts the reliability problem, the utility model discloses a distributed optical fiber sensing oil gas storage tank conflagration monitoring devices has been demonstrated.
In order to achieve the above purpose, the following technical solutions are provided:
a distributed optical fiber sensing oil and gas storage tank fire monitoring device comprises a first distributed optical fiber sensing device host, a second distributed optical fiber sensing device host and temperature sensing optical cables, wherein the first distributed optical fiber sensing device host and the second distributed optical fiber sensing device host are respectively connected to different fiber cores in the same temperature sensing optical cable, and the temperature sensing optical cables are wound on two oil and gas storage tanks;
the distributed optical fiber sensing device host I and the distributed optical fiber sensing device host II are core units of the distributed optical fiber sensing oil-gas storage tank fire monitoring device and are used for sending excitation light pulses, collecting and preprocessing backward Raman scattering signals and uploading preprocessed temperature data;
the temperature sensing optical cable is a sensing and transmitting unit of the distributed optical fiber sensing oil-gas storage tank fire monitoring device and is used for sensing and transmitting temperature field information along the optical cable;
the fiber core is an information acquisition and transmission part in the temperature sensing optical cable, and each fiber core in the optical cable can work independently;
the two oil gas storage tanks are monitoring objects of the distributed optical fiber sensing oil gas storage tank fire monitoring device.
The utility model has the advantages that:
the utility model provides a distributing type optical fiber sensing oil gas storage tank fire monitoring devices, optic fibre itself is temperature sensor, when the breakpoint appears in the whole monitoring system, the distributed optical fiber sensing devices host computer still monitors the most region on the oil gas storage tank, the blind spot does not appear to the monitoring of tank field. The first system provides an engineering scheme for continuously and uninterruptedly monitoring all areas to be monitored when an optical cable has a breakpoint and equipment is upgraded and maintained, and aims to solve the problem of monitoring blind areas during cable breakage repair and equipment maintenance.
Drawings
FIG. 1 is a schematic connection diagram of a distributed optical fiber sensing oil and gas storage tank fire monitoring device;
FIG. 2 is a structural diagram of a temperature sensing optical cable of a distributed optical fiber sensing oil and gas storage tank fire monitoring device;
FIG. 3 is a schematic diagram of a distributed optical fiber sensing breakpoint condition of a hydrocarbon storage tank fire monitoring device.
Wherein: 1. a first distributed optical fiber sensing device host; 2. a second distributed optical fiber sensing device host; 3. a first oil gas storage tank; 4. a second oil gas storage tank; 5. a temperature sensing optical cable; 6. a fiber core I; 7. a second fiber core; 8. a breakpoint; 9. Most of the area on the first oil and gas storage tank; 10. and (4) a complete area of the oil and gas storage tank II.
Detailed Description
In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-3, a distributed optical fiber sensing oil and gas storage tank fire monitoring device comprises a first distributed optical fiber sensing device host 1, a second distributed optical fiber sensing device host 2 and a temperature sensing optical cable 5, wherein the first distributed optical fiber sensing device host 1 and the second distributed optical fiber sensing device host 2 are respectively connected to different fiber cores 6 and 7 in the same temperature sensing optical cable 5, and the temperature sensing optical cable 5 is wound on two oil and gas storage tanks 3 and 4;
the distributed optical fiber sensing device host 1 and the distributed optical fiber sensing device host 2 are core units of a fire monitoring device of the distributed optical fiber sensing oil-gas storage tank, and are used for sending excitation light pulses, collecting and preprocessing backward Raman scattering signals and uploading preprocessed temperature data;
the temperature sensing optical cable 5 is a sensing and transmitting unit of the distributed optical fiber sensing oil-gas storage tank fire monitoring device and is used for sensing and transmitting temperature field information along the optical cable;
the fiber cores 6 and 7 are information acquisition and transmission parts in the temperature sensing optical cable, and each fiber core in the optical cable can work independently;
the two oil gas storage tanks 3 and 4 are monitoring objects of the distributed optical fiber sensing oil gas storage tank fire monitoring device.
The distributed optical fiber sensing device host is DTS, and the distributed optical fiber sensing device host 1 and the distributed optical fiber sensing device host 2 are DTS1 and DTS 2. The DTS sends an excitation light pulse signal to the temperature sensing optical cable, the light pulse can generate Raman scattering in the transmission process of the temperature sensing optical cable, the Raman scattering can occur in all directions of an action point, and meanwhile, the intensity of the Raman scattering is sensitive to the temperature; wherein, the Raman scattering signal carrying temperature field information and transmitted backwards is transmitted to the DTS along the temperature sensing optical cable 5, the DTS detects and collects the Raman scattering signal carrying temperature information, processes and preliminarily calculates the Raman scattering signal, uploads the result to the monitoring platform, and the monitoring platform judges whether fire hazard or abnormal state occurs in the monitoring area.
As shown in fig. 2, the DTS1 and the DTS2 are respectively connected to different fiber cores, i.e., the first fiber core 6 and the second fiber core 7, in the same temperature-sensitive optical cable, and the monitoring is respectively started from two ends of the same temperature-sensitive optical cable 5, when the temperature-sensitive optical cable 5 has a breakpoint 8, the DTS1 starts monitoring the left area of the breakpoint, and the DTS2 starts monitoring the right area of the breakpoint 8, so that a monitoring blind area does not occur.
When a breakpoint 8, as shown in figure 3, occurs in the overall monitoring system, DTS1 begins monitoring the majority of the area 9 on the first oil and gas storage tank 3, and DTS2 begins monitoring the minority of the area on the first oil and gas storage tank 3 and the entire area 10 of the second oil and gas storage tank 4, with no blind spots for the monitoring of the tank field.
In conclusion, compared with the mode that two single-channel optical cables are used for monitoring 2 oil and gas storage tanks respectively, the distributed optical fiber sensing oil and gas storage tank fire monitoring device only changes the single-channel optical cable into the double-core optical cable and prolongs and welds the temperature sensing optical cables of two adjacent large tanks, and under the conditions of increased engineering quantity and low cost, the reliability of long-time, uninterrupted and continuous operation of the system is greatly improved.
Each oil gas storage tank is monitored by two DTSs in a normal state, and mutual correction of the measured data of the whole sensing system can be realized based on comprehensive processing of the temperature data of the overlapped area, so that the reliability of long-term operation of the system is improved. Based on the mode of two-channel respective monitoring, the monitoring blind area generated when the optical cable is disconnected and the monitoring interruption when the equipment is upgraded are effectively eliminated, and the monitoring continuity and reliability of the whole system are improved.
The broken point compensation function is added, after the cable is broken, two areas of the broken point are respectively monitored, the monitoring blind area is prevented from occurring after the broken point, and continuous and uninterrupted monitoring of the monitoring device is facilitated.
The mutual backup setting of the equipment is used, and when the system needs to be upgraded and maintained, the continuous monitoring can still be carried out.
This patent scheme uses distributed optical fiber sensing fire monitoring devices as an example to explain the construction of sensing device, but is not limited to this, and other distributed optical fiber sensing devices based on this scheme framework include: it is also within the scope of this patent to construct a distributed fiber optic vibration sensing system DVS.
This patent scheme only uses 2 DTS monitoring 2 oil gas storage tanks to explain as the example, but is not limited to this, and the building and the expansion of a plurality of oil gas storage tank monitoring devices of many DTS monitoring that go on based on this scheme also are in this patent protection scope.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make many variations and modifications of the present invention without departing from the scope of the present invention by using the method and contents disclosed above.
Claims (1)
1. The utility model provides a distributing type optical fiber sensing oil gas storage tank fire monitoring devices which characterized in that: the distributed optical fiber sensing device comprises a first distributed optical fiber sensing device host, a second distributed optical fiber sensing device host and temperature sensing optical cables, wherein the first distributed optical fiber sensing device host and the second distributed optical fiber sensing device host are respectively connected to different fiber cores in the same temperature sensing optical cable, and the temperature sensing optical cables are wound on two oil gas storage tanks;
the first distributed optical fiber sensing device host and the second distributed optical fiber sensing device host are core units of the distributed optical fiber sensing oil-gas storage tank fire monitoring device, so that sending of excitation light pulses, collection and preprocessing of backward Raman scattering signals and uploading of preprocessed temperature data are realized;
the temperature sensing optical cable is a sensing and transmitting unit of the distributed optical fiber sensing oil-gas storage tank fire monitoring device and is used for sensing and transmitting temperature field information along the optical cable;
the fiber core is an information acquisition and transmission part in the temperature sensing optical cable, and each fiber core in the optical cable can work independently;
the two oil gas storage tanks are monitoring objects of the distributed optical fiber sensing oil gas storage tank fire monitoring device.
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| CN202022385540.XU CN213934243U (en) | 2020-10-23 | 2020-10-23 | Distributed optical fiber sensing oil gas storage tank fire monitoring device |
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| CN202022385540.XU CN213934243U (en) | 2020-10-23 | 2020-10-23 | Distributed optical fiber sensing oil gas storage tank fire monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114333214A (en) * | 2021-12-30 | 2022-04-12 | 国能创新油品销售有限公司 | Fire early warning method and device for oil storage tank, electronic equipment and medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114333214A (en) * | 2021-12-30 | 2022-04-12 | 国能创新油品销售有限公司 | Fire early warning method and device for oil storage tank, electronic equipment and medium |
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