CN113101581A - Urban comprehensive pipe gallery fire-fighting simulation system and test method - Google Patents
Urban comprehensive pipe gallery fire-fighting simulation system and test method Download PDFInfo
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- CN113101581A CN113101581A CN202110404345.3A CN202110404345A CN113101581A CN 113101581 A CN113101581 A CN 113101581A CN 202110404345 A CN202110404345 A CN 202110404345A CN 113101581 A CN113101581 A CN 113101581A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
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Abstract
The invention discloses a fire-fighting simulation system and a test method for an urban comprehensive pipe gallery, which comprises a cable support, a non-flame-retardant outer sheath cable, a combustion oil pan, an automatic fire-extinguishing system/device and a fire-extinguishing control system, wherein the cable support is fixedly arranged on the wall of the underground pipe gallery, the non-flame-retardant outer sheath cable is placed on the cable support, the combustion oil pan is arranged below the non-flame-retardant outer sheath cable, nozzles/fire-extinguishing devices of the automatic fire-extinguishing system are arranged on two sides of the non-flame-retardant outer sheath cable, and the fire-extinguishing control system is arranged at the. Compared with the prior art, the invention fully considers the fire characteristics of the urban comprehensive pipe gallery, combines the advanced fire-fighting technical idea aiming at industrial places internationally at present, develops a simulation system and a performance evaluation method aiming at the local application of a key protection fire-fighting system of the urban comprehensive pipe gallery, reduces the construction investment cost as much as possible when realizing early discovery of fire, early start and early fire extinguishment of the fire-fighting system, and has wide popularization and application values.
Description
Technical Field
The invention relates to a fire-fighting test device, in particular to a fire-fighting simulation system and a fire-fighting test method for an urban comprehensive pipe gallery.
Background
Various engineering pipelines such as electric power, communication, gas, heat supply, water supply and drainage and the like are laid in the comprehensive pipe gallery in a centralized manner, and the comprehensive pipe gallery is provided with a special access hole, a lifting hole and a monitoring system, so that unified planning, unified design, unified construction and management are carried out, and the comprehensive pipe gallery is an important infrastructure and a 'life line' for guaranteeing urban operation. Among the prior art, utility tunnel mostly adopts the mode of the subregion of total flooding application to put out a fire when the conflagration breaing out, spouts simultaneously in the space of length about 200m within ranges promptly, and this mode investment cost is high, the fire extinguishing efficiency is low, can not be accurate in time put out a fire to the position that takes place for the conflagration. Utility tunnel is the industrial site in fact, and its inside power cable who lays connects to be main conflagration risk source, should adopt local application automatic fire extinguishing system or extinguishing device to carry out key protection to high risk position to adopt suitable fire detector to carry out key monitoring to conflagration high risk position, link it with automatic fire extinguishing system (or device), directly spout the fire extinguishing agent towards the fire source position at the conflagration initial stage and put, can show promotion fire extinguishing effect. However, at present, a test model, an evaluation method and a calculation method of key engineering application parameters, which can be used for truly evaluating the performance of the local application key protection fire-fighting system of the comprehensive pipe gallery, are lacked at home and abroad. Therefore, the research and development of the entity fire simulation system of the comprehensive pipe gallery are urgently needed, the performance evaluation method of the fire protection system is provided, and the occupied area investment is reduced while the efficient fire extinguishing of the fire protection system of the comprehensive pipe gallery is realized.
Disclosure of Invention
The invention aims to provide a fire-fighting simulation system and a fire-fighting test method for an urban comprehensive pipe gallery.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
the invention comprises a cable support, a non-flame-retardant outer sheath cable, a combustion oil tray, a fire extinguisher and a fire extinguishing control system, wherein the cable support is fixedly arranged on the wall of a comprehensive pipe gallery, the non-flame-retardant outer sheath cable is arranged on the cable support, the cable support and the non-flame-retardant outer sheath cable are stacked on the wall of the underground pipe gallery in multiple layers, the combustion oil tray is arranged on the ground of the underground pipe gallery and is positioned below the non-flame-retardant outer sheath cable, two fire extinguishing system nozzles/fire extinguishing devices are arranged at the top of the comprehensive pipe gallery, the two fire extinguishing system nozzles/extinguishing devices are respectively positioned at two sides of the non-flame-retardant outer sheath cable, and the fire extinguishing control system is arranged at the top of the underground pipe gallery.
Further, the fire extinguishing control system consists of a thermocouple, a temperature acquisition module, a fire detector (a composite image fire detector, a point type temperature-sensing fire detector/a distributed positioning type linear temperature-sensing fire detector), a data acquisition unit, a single chip microcomputer, a fire extinguishing control module and a timer, wherein the thermocouple is arranged on the non-flame-retardant outer sheath cable, the thermocouple is electrically connected with the temperature acquisition module through a lead, the signal output end of the temperature acquisition module is connected with the signal input end of the data acquisition unit, the signal output end of the fire detector is connected with the signal input end of the data acquisition unit, the signal output end of the data acquisition unit is connected with the signal input end of the single chip microcomputer, the control signal output end of the single chip microcomputer is connected with the signal input end of the fire extinguishing control module, and the control signal output end of the fire extinguishing control module is electrically connected with the fire extinguishing system/device.
Preferably, the fire extinguishing control system is further provided with a pressure sensor and a flow sensor, the pressure sensor and the flow sensor are both connected with a pipeline in front of a spray head of the automatic fire extinguishing system, and signal output ends of the pressure sensor and the flow sensor are connected with a signal input end of the data acquisition unit.
As an improvement, the fire extinguishing control system is further provided with an image fire detector and a background light source, the signal output end of the image fire detector is connected with the signal input end of the data acquisition unit, the background light source is connected with the power output end of the single chip microcomputer, and the background light source is arranged at the top of the underground pipe gallery.
Furthermore, the fire extinguishing control system is also provided with a timer, and the timer is connected with the signal input end of the single chip microcomputer.
As an improvement, the fire extinguishing control system is further provided with a data transmission module, the data transmission module is connected with the data transmission end of the single chip microcomputer, and the data transmission end of the data transmission module is connected with the mobile terminal in a wireless mode.
Preferably, the fire extinguishing material of the automatic fire extinguishing system/fire extinguishing apparatus is one of water mist, compressed air foam, ultrafine dry powder or hot aerosol.
The invention discloses a performance test evaluation method for a fire-fighting system of an urban comprehensive pipe gallery, which comprises the following steps:
s1: protection width test: two automatic fire extinguishing system nozzles/fire extinguishing devices are arranged at the tops of underground pipe galleries on two sides of a non-flame-retardant outer sheath cable, and nozzles face the ground; after igniting the combustion oil disc for precombustion for 2min, manually starting the fire extinguishing system/fire extinguishing device, observing the spraying and fire extinguishing conditions of the fire extinguishing agent, recording the fire extinguishing protection width (namely twice distance between a spray head and the wall surface of a cable support), and recording the working pressure in front of the water mist spray head and the flow of the foam mixed liquid of the compressed air bubble spray head through a pressure sensor and a flow sensor;
s2: fire extinguishing test: the method comprises the following steps of enabling a nozzle of an automatic fire extinguishing system/a nozzle of a fire extinguishing device to face the bottom layer of a cable support, igniting a combustion oil disc for pre-combustion for 2min, manually starting a fire extinguisher, observing a fire extinguishing condition, recording working pressure in front of a water mist nozzle and flow of a foam mixed liquid of a compressed air bubble nozzle through a pressure sensor and a flow sensor, recording time through a timer, and recording a temperature change curve through a thermocouple;
s3: the point type temperature-sensing fire detector/the line type temperature-sensing fire detector comprises the following tests: after the burning oil disc is ignited, observing the alarm condition of the fire detector, and recording the alarm response time and the positioning deviation test data of the fire detector;
s4: testing of the image fire detector: measuring the distance between the image fire detector and the test cable; and after the burning oil disc is ignited, observing the alarm condition of the image fire detector, and recording the alarm response time and the positioning deviation test data of the image fire detector.
The invention has the beneficial effects that:
the invention relates to a fire-fighting simulation system and a fire-fighting performance evaluation test method for an urban comprehensive pipe gallery, which are compared with the prior art, the invention is a research and development simulation system and a performance evaluation method for a local application key protection fire-fighting system of the urban comprehensive pipe gallery on the basis of fully considering the fire characteristics of the urban comprehensive pipe gallery and combining the advanced fire-fighting technical idea aiming at industrial places in the world at present, and the construction investment cost is reduced as much as possible when the early discovery, the early start and the early fire extinguishing of a fire extinguishing system are realized, so that the system and the method have wide popularization and application values.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
fig. 4 is a schematic block diagram of the fire suppression system.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1-4: the invention comprises a cable support 1, a non-flame-retardant outer sheath cable 2, a combustion oil pan 3, a fire extinguisher 4 and a fire extinguishing control system 5, wherein the cable support 1 is fixedly arranged on the wall of an underground pipe gallery, the non-flame-retardant outer sheath cable 2 is arranged on the cable support 1, the cable support 1 and the non-flame-retardant outer sheath cable 2 are stacked on the wall of the underground pipe gallery in multiple layers, the combustion oil pan 3 is arranged on the ground of the underground pipe gallery and is positioned below the non-flame-retardant outer sheath cable 2, two automatic fire extinguishing system nozzles/fire extinguishing devices 4 are arranged at the top of the underground pipe gallery, the two automatic fire extinguishing system nozzles/fire extinguishing devices 4 are respectively positioned at two sides of the non-flame-retardant outer sheath cable 2, and the fire extinguishing control system 5 is arranged at the top of the underground pipe gallery.
Furthermore, the fire extinguishing control system 5 consists of a thermocouple 6, a temperature acquisition module 7, a linear temperature-sensing fire detector 10, a data acquisition device 12, a singlechip 14, a fire extinguishing control module 15 and a timer 16, the thermocouple 6 is arranged on the non-flame-retardant outer sheath cable 2, the thermocouple 6 is electrically connected with the temperature acquisition module 7 through a lead, the signal output end of the temperature acquisition module 7 is connected with the signal input end of the data acquisition device 12, the signal output end of the linear temperature-sensing fire detector 10 is connected with the signal input end of the data collector 12, the signal output end of the data collector 12 is connected with the signal input end of the singlechip 14, the control signal output end of the singlechip 14 is connected with the signal input end of the fire extinguishing control module 15, the control signal output end of the fire extinguishing control module 15 is electrically connected with the automatic fire extinguishing system/fire extinguishing device 4.
Preferably, fire extinguishing control system 5 still is provided with pressure sensor 8, flow sensor 9, pressure sensor 8 and flow sensor 9 all with automatic fire extinguishing systems/extinguishing device 4 is connected, pressure sensor 8 and flow sensor 9's signal output part with data collection station 12's signal input part is connected.
As an improvement, the fire extinguishing control system 5 is further provided with an image fire detector 11 and a background light source 13, the signal output end of the image fire detector 11 is connected with the signal input end of the data acquisition device 12, the background light source 13 is connected with the power output end of the single chip microcomputer 14, and the background light source 13 is arranged at the top of the underground pipe gallery.
Further, the fire extinguishing control system 5 is further provided with a timer 16, and the timer 16 is connected with a signal input end of the single chip microcomputer 14.
As an improvement, the fire extinguishing control system 5 is further provided with a data transmission module 17, the data transmission module 17 is connected with the data transmission end of the single chip microcomputer 14, and the data transmission end of the data transmission module 17 is connected with a mobile terminal 18 through wireless connection.
Preferably, the fire extinguishing material of the automatic fire extinguishing system/fire extinguishing apparatus 4 is one of water mist, compressed air foam, ultra-fine dry powder or hot aerosol.
The invention discloses a performance test evaluation method for a fire-fighting system of an urban comprehensive pipe gallery, which comprises the following steps:
s1: protection width test: two automatic fire extinguishing system nozzles/fire extinguishing devices 4 are arranged at the tops of underground pipe galleries on two sides of the non-flame-retardant outer sheath cable 2, and nozzles face the ground; after igniting the combustion oil disc 3 for precombustion for 2min, manually starting the automatic fire extinguishing system/fire extinguishing device 4, observing the spraying and fire extinguishing conditions of the fire extinguishing agent, measuring and recording the fire extinguishing protection width (namely twice the distance between a spray head and the wall surface of a cable support), and recording the working pressure in front of the water mist spray head and the flow of a foam mixed solution of a compressed air bubble spray head through a pressure sensor 8 and a fire extinguishing flow sensor 9;
s2: fire extinguishing test: a nozzle of a nozzle/fire extinguishing device 4 of the automatic fire extinguishing system faces the bottom layer of the cable support, after a combustion oil disc 3 is ignited for pre-combustion for 2min, the automatic fire extinguishing system/fire extinguishing device 4 is manually started, the fire extinguishing condition is observed, the working pressure in front of a water mist nozzle and the flow of a foam mixed liquid of a compressed air bubble nozzle are recorded through a fire extinguishing pressure sensor 8 and a flow sensor 9, the time is recorded through a timer 16, and a temperature change curve is recorded through a thermocouple 6;
s3: the point type temperature-sensing fire detector \ the line type temperature-sensing fire detector 10 is tested: after the combustion oil disc 3 is ignited, observing the alarm condition of the fire detector 10, and recording the alarm response time and positioning deviation test data of the detector 10;
s4: testing of the image fire detector 11: measuring the distance between the image fire detector 11 and the test cable; after the burning oil pan 3 is ignited, the alarm condition of the image fire detector 11 is observed, and the alarm response time and the positioning deviation test data of the image fire detector 11 are recorded.
Example (b):
test space:
the utility tunnel power cable cabin for the test is a non-closed space with one open end along the longitudinal direction, the width is 2.8m, and the height is 4 m. The test length of the locally applied fire extinguishing system is not less than 15m, the test lengths of the locally applied fire extinguishing device, the point type temperature-sensitive fire detector and the distributed positioning type linear temperature-sensitive fire detector are not less than 10m, and the test length of the composite image fire detector is not less than 100 m. One side in the test chamber is provided with 6 layers of cable supports, the interval between each layer is 550mm, the width of each layer of cable support is 800mm, and the distance between the bottom layer of each layer of cable support and the ground is 400 mm.
A fire model:
3 non-flame-retardant outer sheath cables 2 with the outer diameter of 150mm or the combustion load similar to that of 220kV are arranged at the bottom layer of the cable support 1, and barriers similar to the non-flame-retardant outer sheath cables 2 are arranged on the two layers of the cable support. Each length of the test cable is 800mm, and 1 thermocouple 6 is arranged on the surface of the cable.
A combustion oil pan 3 for ignition is arranged on the ground right below a cable for testing the bottom layer of a cable support 1, the size is 500mm multiplied by 100mm, the fuel adopts n-heptane or gasoline, and the heat release rate is not less than 250 kW.
The test process comprises the following steps:
and (3) fire extinguishing system test:
(1) protection width test:
1) according to the engineering design requirements, 2 water mist nozzles or 2 compressed air foam nozzles, 2 superfine dry powder extinguishing devices or 2 non-temperature-limiting type hot aerosol extinguishing devices are respectively arranged at the tops of underground pipe galleries on two sides of the cable for the test at the outer side of the cable support 1, and nozzles face the ground.
2) After the oil disc is ignited and pre-burns for 2min, the fire extinguishing system/fire extinguishing device is manually started, the fire extinguishing agent spraying and fire extinguishing conditions are observed, and test data such as working pressure in front of the water mist spray head, flow of foam mixed liquid of the compressed air bubble spray head, fire extinguishing time, protection width and the like are recorded.
(2) Fire extinguishing test:
1) according to the engineering design requirements, 2 water mist nozzles or 2 compressed air foam nozzles, 2 superfine dry powder extinguishing devices or 2 non-temperature-limiting type hot aerosol extinguishing devices are respectively arranged at the tops of underground pipe galleries on two sides of the cable for the test at the outer side of the cable support 1, and nozzles face to the bottom layer of the cable support.
2) After the oil disc is ignited and pre-burns for 2min, the fire extinguishing system/fire extinguishing device is manually started, the fire extinguishing condition is observed, and test data such as working pressure in front of the water mist spray head, flow of foam mixed liquid of the compressed air bubble spray head, fire extinguishing time, protection width and the like are recorded.
Point type temperature sensing fire detector/distribution location type line type temperature sensing fire detector is tested:
(1) and according to the engineering design requirement, a sensitive part of the detector is arranged at the top of the underground pipe gallery above the test cable.
(2) After the oil disc is ignited and the cable is ignited, the alarm condition of the detector is observed, and the alarm response time, the positioning deviation and other test data are recorded.
And (3) testing a composite image fire detector:
(1) according to the engineering design requirement, the composite image fire detector and the background light source are arranged at the top of the underground pipe gallery of the test chamber, and the distance between the detector and the test cable is not less than 50 m.
(2) After the oil disc is ignited and the cable is ignited, the alarm condition of the detector is observed, and test data such as alarm response time, positioning accuracy and the like are recorded.
And (3) judging test results:
and (3) fire extinguishing system test:
(1) test for protection width
The protection width of the automatic fire extinguishing system/device should not be greater than the data of the protection width test.
(2) Fire extinguishing test
The time from the spraying of the water mist to the fire extinguishing of the water mist fire extinguishing system is not more than 5min, and the re-burning phenomenon is avoided after the fire extinguishing. The time from the spraying of compressed air foam to the fire extinguishing of the compressed air foam fire extinguishing system is not more than 1min, and the re-burning phenomenon is avoided after the fire extinguishing. The superfine dry powder fire extinguishing device and the non-temperature-limiting type hot aerosol fire extinguishing device can extinguish open fire after the spraying is finished, and the re-burning phenomenon does not occur after 5 min.
(3) The design spraying intensity of the water mist fire extinguishing system and the design spraying intensity of the foam mixed liquid of the compressed air foam fire extinguishing system are calculated according to the following formula:
W＝q/s
in the formula: w-design spray intensity, foam mixed liquor design spray intensity (L/min. m.2)；
q is the design flow (L/min) of the water mist and foam mixed liquid of the spray head. Water mist fire extinguishing systemQ of system according to formula
Calculating K, P flow coefficient of the nozzle and design working pressure of the nozzle, foam mixed liquid q according to measured data;
s-protective area of spray head (m)2) J, B are respectively the arrangement spacing and the protection width of the spray heads (according to the data of the protection width test) according to the formula S ═ JXB;
(4) the fire extinguishing design strength of the superfine dry powder fire extinguishing device and the non-temperature-limiting type thermal aerosol fire extinguishing device is calculated according to the following formula:
D＝M/(S×t)
in the formula: d-fire extinguishing design Strength (kg/s.m.)2)；
M represents the filling amount (kg) of the fire extinguishing agent of a single fire extinguishing device;
s-protective area of fire extinguishing apparatus (m)2) J, B respectively represents the arrangement spacing and the protection width of the fire extinguishing device (determined according to a protection width test) according to the formula S ═ JXB;
t-injection time(s), based on measured data.
Point type temperature sensing fire detector/distribution location type line type temperature sensing fire detector is tested:
(1) the alarm response time should not be greater than 60 s;
(2) the longitudinal positioning deviation of the distributed positioning type linear temperature-sensing fire detector is not more than +/-0.5 m.
And (3) testing a composite image fire detector:
(1) the alarm response time of the detector is not more than 30 s;
(2) the longitudinal positioning precision is not more than +/-1.5 m, and the transverse positioning precision is not more than +/-0.3 m.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a city utility tunnel fire control analog system which characterized in that: the fire extinguishing system comprises a cable support (1), a non-flame-retardant outer sheath cable (2), a combustion oil pan (3), automatic fire extinguishing system nozzles/fire extinguishing devices (4) and a fire extinguishing control system (5), wherein the cable support (1) is fixedly arranged on the wall of a comprehensive pipe gallery, the non-flame-retardant outer sheath cable (2) is arranged on the cable support (1), the cable support (1) and the non-flame-retardant outer sheath cable (2) are stacked on the wall of the underground pipe gallery in multiple layers, the combustion oil pan (3) is arranged on the ground of the underground pipe gallery and is positioned below the non-flame-retardant outer sheath cable (2), the number of the automatic fire extinguishing system nozzles/fire extinguishing devices (4) is two, the automatic fire extinguishing system nozzles/fire extinguishing devices (4) are arranged at the top of the underground pipe gallery, and the two automatic fire extinguishing system nozzles/fire extinguishing devices (4) are respectively, and the automatic fire extinguishing system spray head/fire extinguishing device (5) is arranged at the top of the underground pipe gallery.
2. The urban utility tunnel fire-fighting simulation system according to claim 1, characterized in that: the fire extinguishing control system (5) is composed of a thermocouple (6), a temperature acquisition module (7), a fire detector (10), a data collector (12), a single chip microcomputer (14), a fire extinguishing control module (15) and a timer (16), the thermocouple (6) is arranged on the non-flame-retardant outer sheath cable (2), the thermocouple (6) is electrically connected with the temperature acquisition module (7) through a lead, the signal output end of the temperature acquisition module (7) is connected with the signal input end of the data collector (12), the signal output end of the linear temperature-sensitive fire detector (10) is connected with the signal input end of the data collector (12), the signal output end of the data collector (12) is connected with the signal input end of the single chip microcomputer (14), the control signal output end of the single chip microcomputer (14) is connected with the signal input end of the fire extinguishing control module (15), and the control signal output end of the fire extinguishing control module (15) is electrically connected with the fire extinguisher (4).
3. The urban utility tunnel fire-fighting simulation system according to claim 2, characterized in that: fire extinguishing control system (5) still are provided with pressure sensor (8), flow sensor (9), pressure sensor (8) and flow sensor (9) all with the pipe connection before automatic fire extinguishing system shower nozzle (4), the signal output part of pressure sensor (8) and flow sensor (9) with the signal input part of data collection station (12) is connected.
4. The urban utility tunnel fire-fighting simulation system according to claim 2, characterized in that: fire extinguishing control system (5) still are provided with image fire detector (11) and background light source (13), the signal output part of image fire detector (11) with the signal input part of data collection station (12) is connected, background light source (13) with the power output part of singlechip (14) is connected, background light source (13) set up in the top of underground pipe gallery.
5. The urban utility tunnel fire-fighting simulation system according to claim 2, characterized in that: the fire extinguishing control system (5) is further provided with a timer (16), and the timer (16) is connected with a signal input end of the single chip microcomputer (14).
6. The urban utility tunnel fire-fighting simulation system according to claim 2, characterized in that: the fire extinguishing control system (5) is further provided with a data transmission module (17), the data transmission module (17) is connected with the data transmission end of the single chip microcomputer (14), and the data transmission end of the data transmission module (17) is connected with the mobile terminal (18) in a wireless mode.
7. The urban utility tunnel fire-fighting simulation system according to claim 1 or 2, characterized in that: the fire extinguishing material of the automatic fire extinguishing system/fire extinguishing device (4) is one of water mist, compressed air foam, superfine dry powder or hot aerosol.
8. A fire-fighting simulation test method for an urban comprehensive pipe gallery is characterized by comprising the following steps:
s1: protection width test: two automatic fire extinguishing system nozzles/fire extinguishing devices (4) are arranged at the tops of underground pipe galleries on two sides of a non-flame-retardant outer sheath cable (2), and nozzles face the ground; after the burning oil disc (3) is ignited for precombustion for 2min, the automatic fire extinguishing system/fire extinguishing device (4) is manually started, the spraying and fire extinguishing conditions of the fire extinguishing agent are observed, the pressure and the flow of a pipeline in front of a nozzle of the automatic fire extinguishing system are recorded through a pressure sensor (8) and a flow sensor (9), and the fire extinguishing protection width is measured;
s2: fire extinguishing test: a nozzle of a spray head/fire extinguishing device (4) of the automatic fire extinguishing system faces to the bottom layer of the cable support, after a combustion oil disc (3) is ignited for pre-combustion for 2min, the automatic fire extinguishing system/fire extinguishing device (4) is manually started, the fire extinguishing condition is observed, the pressure and the flow of a pipeline in front of the spray head of the automatic fire extinguishing system are recorded through a pressure sensor (8) and a flow sensor (9), the time is recorded through a timer (16), and a temperature change curve is recorded through a thermocouple (6);
s3: the test of the linear temperature-sensing fire detector (10): after the oil burning disc (3) is ignited, the alarming condition of the linear temperature-sensing fire detector (10) is observed, and the alarming response time and the positioning deviation test data of the linear temperature-sensing fire detector (10) are recorded;
s4: testing of the image fire detector (11): measuring the distance between the image fire detector (11) and the test cable; after the burning oil disc (3) is ignited, the alarm condition of the image fire detector (11) is observed, and the alarm response time and the positioning deviation test data of the image fire detector (11) are recorded.
9. The urban comprehensive pipe gallery fire-fighting simulation test method according to claim 8, characterized in that: in the fire extinguishing test, when the automatic fire extinguishing system/fire extinguishing apparatus (4) is a water mist fire extinguishing system or a compressed air foam fire extinguishing system, the spraying intensity or the foam mixed liquid spraying intensity is calculated according to the following formula:
W＝q/s
in the formula: w-design spray intensity, foam mixed liquor design spray intensity (L/min. m.2)；
q-the design flow (L/min) of the water mist and foam mixed liquid of the spray head; q formula of water mist fire extinguishing system
Calculation of K,P is the flow coefficient of the spray head and the design working pressure of the spray head respectively, and the foam mixed liquid q is according to the measured data;
s-protective area of spray head (m)2) The formula S is calculated as jxb, and J, B is the arrangement pitch and the guard width of the heads, respectively.
10. The urban comprehensive pipe gallery fire-fighting simulation test method according to claim 8, characterized in that: in the fire extinguishing test, when the automatic fire extinguishing system/fire extinguishing apparatus (4) is an ultrafine dry powder fire extinguishing apparatus or a hot aerosol fire extinguishing apparatus, the fire extinguishing design strength is calculated according to the following formula:
D＝M/(S×t)
in the formula: d-fire extinguishing design Strength (kg/s.m.)2)；
M represents the filling amount (kg) of the fire extinguishing agent of a single fire extinguishing device;
s-protective area of fire extinguishing apparatus (m)2) According to the formula S, the distance between the fire extinguishing devices and the protection width are calculated according to the formula J multiplied by B, wherein J, B represents the arrangement distance and the protection width of the fire extinguishing devices respectively;
t-injection time(s).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113694447A (en) * | 2021-09-03 | 2021-11-26 | 国网安徽省电力有限公司滁州供电公司 | Cable trench fire monitoring and fire extinguishing simulation device |
| CN113866216A (en) * | 2021-10-25 | 2021-12-31 | 山东电力研究院 | Perfluorohexanone extinguishing device test platform for cable trench fire |
| CN115337585A (en) * | 2022-08-17 | 2022-11-15 | 安徽中科安和科技有限公司 | Compressed air foam fire extinguishing system for urban comprehensive pipe gallery |
| CN115350425A (en) * | 2022-08-25 | 2022-11-18 | 国网安徽省电力有限公司电力科学研究院 | High tension switchgear conflagration early warning and suppression simulation research device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113694447A (en) * | 2021-09-03 | 2021-11-26 | 国网安徽省电力有限公司滁州供电公司 | Cable trench fire monitoring and fire extinguishing simulation device |
| CN113866216A (en) * | 2021-10-25 | 2021-12-31 | 山东电力研究院 | Perfluorohexanone extinguishing device test platform for cable trench fire |
| CN115337585A (en) * | 2022-08-17 | 2022-11-15 | 安徽中科安和科技有限公司 | Compressed air foam fire extinguishing system for urban comprehensive pipe gallery |
| CN115350425A (en) * | 2022-08-25 | 2022-11-18 | 国网安徽省电力有限公司电力科学研究院 | High tension switchgear conflagration early warning and suppression simulation research device |
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