CN115487458A - Fire extinguishing test system for cabinet and power distribution cabinet and working method thereof - Google Patents
Fire extinguishing test system for cabinet and power distribution cabinet and working method thereof Download PDFInfo
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- CN115487458A CN115487458A CN202211288965.6A CN202211288965A CN115487458A CN 115487458 A CN115487458 A CN 115487458A CN 202211288965 A CN202211288965 A CN 202211288965A CN 115487458 A CN115487458 A CN 115487458A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0081—Training methods or equipment for fire-fighting
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
- A62C99/0027—Carbon dioxide extinguishers
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- Health & Medical Sciences (AREA)
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fire Alarms (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The invention relates to the technical field of fire extinguishing tests and provides a fire extinguishing test system for cabinets and power distribution cabinets and a working method thereof, wherein the fire extinguishing test system comprises a fire test room and a control room, a plurality of cabinets and power distribution cabinets are arranged in the fire test room, and a fire extinguishing agent storage tank, a fire linkage controller and an air suction type smoke fire detector are arranged in the control room; the fire laboratory is provided with an air suction type smoke-sensing fire detector sampling pipe, the sampling pipe is provided with a plurality of air channel control valves and connected with a capillary sampling pipe, and the end part of the sampling pipe extends into the cabinet and the power distribution cabinet; different gas circuit control valves are opened in turn at different times; the fire disaster laboratory is provided with a fire extinguishing agent pipeline connected with a fire extinguishing agent storage tank, the fire extinguishing agent pipeline is provided with a plurality of fire extinguishing agent electromagnetic valves, the fire extinguishing agent electromagnetic valves are connected with a fire disaster linkage controller, and the fire extinguishing agent electromagnetic valves are connected with fire extinguishing agent nozzles. The fixed-point releasing fire extinguishing effect of the pipe network type fire extinguishing system can be tested, and the alarming and positioning functions of the fire detecting system can be tested.
Description
Technical Field
The invention relates to the technical field of fire extinguishing tests, in particular to a fire extinguishing test system for a cabinet and a power distribution cabinet and a working method of the fire extinguishing test system.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
With the rapid development of information technologies such as 5G, cloud computing, big data and the like, a data center has become an important infrastructure of global digital economy as a data stream transfer hub and a service bearing platform. The modern data center adopts a modular design concept, integrates a power supply, a power distribution system, a refrigeration system, a server, a storage and the like with a cabinet, and is constructed through a standardized modular architecture, so that the coupling of infrastructure to the machine room environment is reduced to the greatest extent. With the larger and larger server use scale, the data value is higher and higher, and once a fire disaster occurs, serious information interruption and huge economic loss are caused if the fire disaster is not suppressed in time.
With the scientific and technological progress and the rapid development of economy, the demand of society on electric power is continuously increased, and the use of power distribution cabinets is also increased day by day. The components in the power distribution cabinet mainly comprise a circuit breaker, a disconnecting switch, a load switch, various protection devices and the like. The device is connected through a plurality of cables and connecting terminals, when faults such as overlarge contact resistance, short circuit, electric leakage, overload and the like occur locally, local temperature is easily and rapidly increased, and serious fire accidents are caused by ignition of an insulating layer of equipment and nearby cables.
The data center cabinet and the transformer substation power distribution cabinet are generally distributed in a multi-row parallel mode, and the common fire detection modes mainly comprise a point type smoke detector, a point type temperature detector, an air suction type smoke detector and the like. The point-type temperature-sensitive detector generally can give an alarm only after the temperature of the naked fire rises, and the response speed is relatively slow. The point type smoke detector and the suction type smoke detector can detect smoke particles without generating open fire at the initial stage of a fire or at the initial stage of the open fire. Fire detectors of a data center and a transformer substation are generally installed at the top of an indoor room, a cabinet and a power distribution cabinet are relatively closed, smoke generated inside is difficult to diffuse indoors in a short time, and the response of a point type smoke-sensitive fire detector at the top of the room is delayed. The air suction type smoke detector carries out fire monitoring by laying an air sample of a sampling pipe network extraction protection space, can adopt a mode of arranging a branch capillary sampling pipe on a main sampling pipe, and the capillary sampling pipe penetrates into a cabinet or a power distribution cabinet to actively extract air, so that an alarm can be given out in the early stage of fire occurrence.
The data center cabinet and the power distribution cabinet are internally provided with the server, the circuit breaker and other electrical equipment, water-based fire extinguishing modes which easily cause electrical short circuit such as water spraying and water mist are not suitable, a gas fire extinguishing system is generally adopted, and the fire extinguishing system has the characteristics of high fire extinguishing efficiency, non-conductivity, no residue and the like. Common gaseous extinguishing agents include carbon dioxide, heptafluoropropane, perfluorohexanone, and the like.
However, the existing fire extinguishing test system is only suitable for a single fire extinguishing agent and a single space, and cannot test the detection alarm performance of multiple types of fire detectors, and also cannot test the alarm positioning function of the fire detection system and the fixed-point release fire extinguishing effect of the pipe network type fire extinguishing system used for the cabinet and the power distribution cabinet.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a fire extinguishing test system for a cabinet and a power distribution cabinet and a working method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a fire extinguishing test system for a cabinet and a power distribution cabinet.
A fire extinguishing test system for cabinets and power distribution cabinets comprises a fire experiment room and a control room, wherein a plurality of cabinets and power distribution cabinets are placed in the fire experiment room, and a fire extinguishing agent storage tank, a fire linkage controller and an air suction type smoke fire detector connected with the fire linkage controller are arranged in the control room;
the top and the middle part of the fire laboratory are respectively provided with an air-breathing smoke-sensing fire detector sampling pipe connected with the air-breathing smoke-sensing fire detector, and the air-breathing smoke-sensing fire detector sampling pipe is provided with a plurality of air path control valves; a gas circuit control valve on a sampling pipe of an air-breathing smoke-sensing fire detector in the middle of a fire laboratory is connected with a capillary sampling pipe, and the end part of the capillary sampling pipe extends into the cabinet and the power distribution cabinet and is used for extracting air in the cabinet body; different gas circuit control valves are opened in turn in a time-sharing manner, and air samples of a fire laboratory or different cabinets or power distribution cabinets are collected respectively;
fire extinguishing agent pipelines connected with the fire extinguishing agent storage tank are distributed at the top and the middle of the fire disaster laboratory, a plurality of fire extinguishing agent electromagnetic valves are arranged on the fire extinguishing agent pipelines, the fire extinguishing agent electromagnetic valves are connected with the fire disaster linkage controller, and the fire extinguishing agent electromagnetic valves are connected with fire extinguishing agent nozzles; and the fire extinguishing agent nozzle on the fire extinguishing agent pipeline in the middle of the fire disaster laboratory extends into the cabinet and the power distribution cabinet.
Further, a point type temperature-sensing fire detector and a point type smoke-sensing fire detector are mounted at the tops of the fire laboratory, the cabinet and the power distribution cabinet, and the point type temperature-sensing fire detector and the point type smoke-sensing fire detector are connected with the fire linkage controller.
Furthermore, a composite gas analyzer connected with the fire disaster linkage controller is also arranged in the control room;
a plurality of composite gas analyzer air suction pipes are arranged on the side walls of the fire disaster laboratory, the cabinet and the power distribution cabinet;
the compound gas analyzer is connected with the compound gas analyzer through a gas suction pipe.
Furthermore, an intelligent temperature recorder connected with the fire linkage controller is also arranged in the control room;
a plurality of thermocouples are uniformly arranged on the side walls of the fire laboratory, the cabinet and the power distribution cabinet;
the thermocouple is connected to the intelligent temperature recorder.
Furthermore, a bolometer connected with the fire linkage controller is arranged in the control room;
a plurality of heat radiation sensors are arranged on the side walls of the cabinet and the power distribution cabinet;
the thermal radiation sensor is connected to the bolometer.
Furthermore, a plurality of equipment cases are arranged in one cabinet, and a trunking cable is arranged below the equipment cases.
Furthermore, a plastic shell is installed in one of the power distribution cabinets, and a trunking cable is installed below the plastic shell.
Furthermore, the trunking cable is connected with a cable overload tester in the fire test room.
Further, an oil pan bracket is arranged below the trunking cable, an oil pan is placed on the oil pan bracket, and the oil pan is used for injecting n-heptane to ignite the cable.
The invention provides a working method of the fire extinguishing test system for the cabinet and the power distribution cabinet, which comprises the following steps:
starting the fire linkage controller and the air suction type smoke fire detector;
when smoke is generated, the fire linkage controller controls different gas path control valves to be opened in turn in a time-sharing manner, respectively collects air samples of a fire laboratory or different cabinets or power distribution cabinets and transmits the air samples to the air-breathing type smoke-sensing fire detector until the air-breathing type smoke-sensing fire detector gives an alarm and displays the gas path control valve which is opened when the alarm is given;
and after a period of time after flame is generated, the fire linkage controller controls fire extinguishing agent electromagnetic valves at different positions to be opened, so that the gaseous fire extinguishing agent in the fire extinguishing agent storage tank is sprayed out through the fire extinguishing agent spray head.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the fire extinguishing test system for the cabinet and the power distribution cabinet, the cabinet and the power distribution cabinet are arranged side by side, so that the detection alarm performance of multiple types of fire detectors can be tested, particularly, the air suction type smoke-sensing fire detector can test the alarm positioning function of the fire detection system; the fire extinguishing test is suitable for various gas fire extinguishing agents, and can test the fixed-point release fire extinguishing effect of the pipe network type fire extinguishing system.
2. The fire extinguishing test system for the cabinet and the power distribution cabinet can test the detection performance of different fire detectors, and comprises low-concentration smoke particles in a heating smoldering stage of a cable, high-concentration smoke in an open fire stage and temperature change. And testing the fire alarm positioning function of the fire detector to different independent spaces. The applicability of the gas fire extinguishing device for testing different fire extinguishing media to the fire disasters of the cabinets and the power distribution cabinets and the effect of extinguishing fire for a single or a plurality of cabinets are tested. Data such as combustion temperature, thermal radiation value, gas component concentration generated by combustion and the like in the test process are collected through a high-temperature thermocouple, a bolometer, a composite gas analyzer and the like, and the test result is scientifically analyzed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate and not limit the invention.
Fig. 1 is a front sectional view of a fire extinguishing test system for a cabinet and a power distribution cabinet according to embodiment 1 of the present invention;
fig. 2 is a top view of a fire extinguishing test system for cabinets and distribution cabinets in embodiment 1 of the present invention;
fig. 3 is a partial view of the fire extinguishing test system for the cabinet and the power distribution cabinet in embodiment 1 of the invention in the direction of a;
fig. 4 is a partial view of a fire extinguishing test system for a cabinet and a power distribution cabinet according to embodiment 1 of the present invention in the direction B.
The system comprises a thermal radiometer 1, a composite gas analyzer 2, an intelligent thermometer recorder 3, an intelligent thermometer recorder 4, a fire extinguishing agent storage tank 5, a fire linkage controller 6, a suction type smoke fire detector 7, a sampling pipe 8, a fire extinguishing agent pipeline 9, a composite gas analyzer suction pipe 10, a gas path control valve 11, a large-flow fire extinguishing agent spray head 12, a fire extinguishing agent electromagnetic valve 13, a point type temperature fire detector 14, a point type smoke fire detector 15, a thermocouple 16, a circuit breaker 17, a wire casing cable 18, an oil pan 19, an oil pan support 20, an infrared camera 21, a small-flow fire extinguishing agent spray head 22, an infrared camera 23, a thermal radiation sensor 24, a cable overload tester 25, a server case 26, a capillary sampling pipe 27, a cabinet 28, a power distribution cabinet 29, a test cabinet 30 and a test power distribution cabinet.
Detailed Description
The invention is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only terms determined for convenience of describing structural relationships of components or elements of the present invention, and are not intended to refer to any components or elements of the present invention, and should not be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like should be understood broadly, and mean that they may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1
The embodiment 1 of the invention provides a fire extinguishing test system for cabinets and power distribution cabinets, which is characterized in that a plurality of cabinets or power distribution cabinets are arranged in parallel in a fire test chamber with a certain size, fire detectors and gas fire extinguishing devices are respectively arranged in the cabinet and the indoor, test data are collected through various types of environmental sensors such as temperature, gas and thermal radiation, and the detection performance and the fire extinguishing effect of the fire detectors and the gas fire extinguishing devices of different types are tested.
The fire extinguishing test system for the cabinet and the power distribution cabinet, provided by the embodiment 1 of the invention, is composed of a relatively closed fire test room and a control room, a partition wall between the fire test room and the control room is provided with a fireproof high-temperature-resistant toughened glass observation window, and testers perform data acquisition and observation test processes in the control room.
Where the fire laboratory is 4.5 meters long, 4.5 meters wide, and 5 meters high, these dimensions are merely typical values, including but not limited to the above dimensions.
The fire extinguishing test system for the cabinet and the power distribution cabinet provided by the embodiment 1 of the invention comprises a data center cabinet (hereinafter referred to as the cabinet), the power distribution cabinet, a point type smoke fire detector, a point type temperature sensing fire detector, an air suction type smoke fire detector, an air sampling pipe, an air path control valve, a fire linkage controller, a gas fire extinguishing device, a fire extinguishing agent pipeline, an electromagnetic valve, a fire extinguishing agent spray head, an ignition oil pan, an oil pan bracket, a high-temperature thermocouple, an intelligent temperature recorder, a composite gas analyzer (capable of analyzing gas components such as oxygen, carbon monoxide, carbon dioxide, sulfur dioxide, nitrogen monoxide and hydrogen sulfide), a bolometer, a cable overload tester, an infrared camera and the like.
As shown in fig. 1 and 2, a row of cabinets 27 and a row of distribution cabinets 28 are respectively disposed on two sides in the fire laboratory. A fire laboratory roof middle mounting point type temperature-sensitive fire detector 13 and a point type smoke-sensitive fire detector 14. An air suction type smoke-sensing fire detector sampling pipe 7 is arranged at the top of a fire laboratory, and air path control valves 10 for air sampling are arranged at certain distances above a cabinet 27 and a power distribution cabinet 28 in parallel respectively and used for extracting indoor air. The top of the fire disaster laboratory is provided with a fire extinguishing agent pipeline 8, the middle of the top is provided with a fire extinguishing agent electromagnetic valve 12 and a large-flow fire extinguishing agent nozzle 11, and the fire extinguishing agent electromagnetic valve 12 and the large-flow fire extinguishing agent nozzle 11 are connected with the end part of the fire extinguishing agent pipeline 8.
The maximum injection time of gas extinguishing agents such as perfluorohexanone, heptafluoropropane and trifluoromethane is 10 seconds, the size of a protected space is considered, a large-flow spray head is needed for a large-space fire extinguishing system, the large-flow spray head is used under the condition that the flow of a single spray head is more than 5kg/s, and one or more small-flow spray heads are used under the condition that the flow of the single spray head is less than 5 kg/s.
The middle part and the top of the side wall of the fire experiment chamber are respectively provided with a composite gas analyzer suction pipe 9 which is connected with the composite gas analyzer 2 in the control chamber through a silica gel hose and is used for monitoring the change of gas components generated by combustion in the experiment chamber in the test process. The middle part of the side wall of the fire disaster laboratory room is upwards and uniformly provided with a plurality of thermocouples 15 for monitoring the temperature change in the laboratory room in the test process, and the thermocouples 15 are positioned between the cabinet 27 and the power distribution cabinet 28. An infrared camera 20 is installed on the side wall of the fire laboratory room and used for shooting and recording video data in the test process.
Sampling pipes 7 of the air suction type smoke fire detector are respectively arranged above the parallel cabinets 27 and the parallel power distribution cabinets 28 at a certain distance, and the tops of each cabinet and each power distribution cabinet correspond to one capillary sampling pipe 26 and are connected to the sampling pipes 7 above the cabinets for extracting air inside the cabinets. Specifically, the top of every rack and switch board all sets up a sampling hole, and sampling hole is passed through to the one end of capillary sampling pipe 26 and is stretched into rack or switch board, and the sampling pipe 7 of the formula of breathing in smoke fire detector directly over rack and the switch board is connected to the other end.
As shown in fig. 3, a point type temperature-sensitive fire detector 13 and a point type smoke-sensitive fire detector 14 are installed on the top surface of a parallel cabinet 27, a capillary sampling pipe 26 is installed on the top surface of the cabinet 27, the capillary sampling pipe 26 is connected with a main sampling pipe 7 of the air-breathing smoke-sensitive fire detector above the cabinet, and a gas path control valve 10 is arranged between the capillary sampling pipe 26 and the main sampling pipe 7 to control the opening and closing of a branch of the capillary sampling pipe.
A plurality of server cases 25 (or equipment cases such as switches and storages) are arranged in one test cabinet 29 of the side-by-side cabinets 27, a trunking cable 17 (cabling cable in the trunking) is longitudinally arranged at the lower part of a rear upright of the test cabinet 29 and is used as a combustible substance for detection and fire extinguishing tests, and the trunking and the cable are longitudinally arranged along the upright because cabinet equipment is generally wired from the rear and the cable is generally longitudinally arranged along the upright. A thermocouple 15 is arranged above the trunking cable 17 at a certain distance, the thermocouple 15 is arranged at the top of the test cabinet 29, and a plurality of thermocouples 15 are uniformly distributed in the middle and used for collecting the temperatures of different positions of the cabinet in the test process. The top of the cabinet 29 is provided with a compound gas analyzer suction pipe 9 for extracting gas components of the gas analysis combustion products. In order to prevent high-temperature damage in the fire extinguishing test, the air suction pipe 9 of the composite gas analyzer adopts a high-temperature resistant stainless steel pipe inside the cabinet, and the outside of the cabinet is connected with the composite gas analyzer 2 in the control room through a silica gel hose. The cabinet 29 houses an oil pan support 19 on the bottom and an oil pan 18 on the top, preferably having dimensions 300X 150mm and a wall thickness of 3mm. An oil pan 18 is located a distance, preferably 200mm, below the raceway cable 17 for injecting n-heptane to ignite the cable. A thermal radiation sensor 23 is arranged on the lower portion of the side wall of the machine cabinet 29, a receiving surface of the thermal radiation sensor faces the trunking cable 17 above the oil pan, and the thermal radiation sensor is used for monitoring a thermal radiation value generated by combustion of combustible materials (the trunking cable 17) in a test. A thermal radiation sensor 23 is arranged on the upper portion of the side wall of the cabinet 29 and used for monitoring the change of the thermal radiation value of the server case caused by combustion in a test. An infrared camera 22 is installed below the server case 26 on the side wall of the cabinet 29, and is protected by a high-temperature-resistant protective cover, so as to record the combustion state and the fire extinguishing effect of combustible materials in the test.
As shown in fig. 4, some temperature-sensitive fire detectors 13 and some smoke-sensitive fire detectors 14 are mounted on the top surfaces of parallel power distribution cabinets 28, capillary sampling pipes 26 are mounted in the middle of the top surfaces, the capillary sampling pipes 26 are connected with main sampling pipes 7 of the air-breathing smoke-sensitive fire detectors 6 above the power distribution cabinets, and air path control valves 10 are arranged between the capillary sampling pipes 26 and the main sampling pipes 7 to control the opening and closing of branches of the capillary sampling pipes.
One test power distribution cabinet 30 of the parallel power distribution cabinets 28 is internally provided with a plastic shell of electrical equipment such as a circuit breaker and a fuse, and combustible materials such as a cross-linked polyethylene cable. The lower part of the power distribution cabinet 30 is provided with a trunking cable 17, and the upper part is provided with a row of plastic shells of equipment such as a circuit breaker 16 or an isolating switch and the like. A thermocouple 15 is arranged on a trunking cable 17 of the power distribution cabinet, a thermocouple 15 is arranged on a circuit breaker 16, a thermocouple 15 is arranged at the top of the power distribution cabinet 30, and a plurality of thermocouples 15 are uniformly distributed in the middle of the power distribution cabinet and used for collecting temperatures of different heights in the test process. The top of the power distribution cabinet 30 is provided with a composite gas analyzer air suction pipe 9 for extracting gas components of the gas analysis combustion products. In order to prevent high temperature damage in the fire extinguishing test, the composite gas analyzer air suction pipe 9 adopts a high temperature resistant stainless steel pipe inside the power distribution cabinet, and the power distribution cabinet is externally connected with the composite gas analyzer 2 in the control room through a silica gel hose. The switch cabinet 30 has an oil pan support 19 on the bottom and an oil pan 18 on the top, preferably having dimensions of 300X 150mm and a wall thickness of 3mm. An oil pan 18 is located a distance, preferably 200mm, below the raceway cable 17 for injecting n-heptane to ignite the cable and the circuit breaker plastic housing. 30 lateral walls of switch board set up thermal radiation sensor 23, and thermal radiation sensor 23's receiving surface is just to the wire casing cable 17 of food tray top for the thermal radiation value of combustible substance burning in the monitoring test. The infrared camera 22 is installed to the 30 lateral walls of switch board, adopts high temperature resistant protection casing to protect for the state and the fire extinguishing effect of experimental burning of record.
The connection part of the main sampling pipe 7 and the capillary sampling pipe 26 of the air suction type smoke fire detector 6 is provided with an air channel control valve 10, and each capillary sampling pipe 26 and the air channel control valve 10 correspond to a cabinet or a power distribution cabinet. The air path control valves 10 are opened in turn in time-sharing mode, air samples of a fire laboratory or different cabinets or power distribution cabinets are collected respectively, and only one air sample is collected at the same time. Once the smoke concentration is detected to exceed the set alarm threshold value, the specific cabinet or power distribution cabinet in which a fire disaster occurs can be positioned by confirming the gas circuit control valve 10 which is opened during alarm.
The fire linkage controller 5 is connected with an electromagnetic valve 12 of a fire extinguishing agent pipeline and controls the starting and stopping of fire extinguishing nozzles of different cabinets or power distribution cabinets.
A fire extinguishing agent storage tank 4 of the gas fire extinguishing device is placed in a control room and is connected with a large-flow fire extinguishing agent nozzle 11 at the top of a fire test room and a small-flow fire extinguishing agent nozzle 21 inside a cabinet and a power distribution cabinet through a fire extinguishing agent pipeline 8. When a fire alarm is given, the fire linkage controller 5 opens the fire extinguishing agent electromagnetic valve 12 at the fire alarm position, and extinguishes the fire by spraying the fire extinguishing agent through the fire extinguishing agent nozzle.
The fire linkage controller 5 is connected with a point type temperature-sensitive fire detector 13, a point type smoke-sensitive fire detector 14, a suction type smoke-sensitive fire detector 6, an intelligent temperature recorder 3 and a composite gas analyzer 2, can comprehensively judge the danger degree and the specific position of a fire disaster through the change of parameters such as smoke concentration, temperature and gas concentration, and can identify whether the fire disaster is real or not through an algorithm and start a fire extinguishing device or not. Setting multi-level alarm, if the smoke concentration or the concentration of gas generated by fire such as carbon monoxide, sulfur dioxide and the like reaches a set low concentration alarm threshold value, the fire linkage controller 5 sends out primary or intermediate alarm; if the smoke concentration and the gas concentration generated by the fire continuously rise to reach the high concentration alarm threshold value and the temperature also reaches the alarm threshold value, the fire linkage controller 5 issues a high-level fire alarm. After reaching the high-level fire alarm level, the system sets a certain time delay to give the staff the time for processing confirmation. If no manual intervention operation is performed after the delay time is over, the fire linkage controller 5 controls the fire extinguishing agent electromagnetic valve 12 at the position where the fire occurs, and opens the fire extinguishing agent nozzle to extinguish the fire.
The intelligent temperature recorder 3 is positioned in the control room, is connected with each thermocouple 15 through a high-temperature-resistant lead, and records the temperature in the test process. The bolometer 1 and the compound gas analyzer 2 can be provided with a plurality of paths or a plurality of paths, respectively record the thermal radiation values and the concentrations of various gases at different positions, have a data recording function, and can derive data for analysis after the test is finished. The bolometer 1 is connected to all the thermal radiation sensors 23. The intelligent temperature recorder 3 is connected with all the thermocouples 15 through high-temperature-resistant leads, and records the temperature in the test process.
The test point type smoke detector and the air-breathing type smoke detector do not need to generate open fire, and a cable overload tester 24 is adopted to load a large current to heat a cable to generate smoke; the test point type temperature-sensitive detector and the gas fire extinguishing device need to ignite the oil disc and pre-combust for a certain time to extinguish fire.
During the smoke test, the cable inside the cabinet and the power distribution cabinet can be connected with a cable overload tester, and high temperature is generated by loading large current on the cable, so that the polyvinyl chloride on the insulating layer is heated to generate smoke particles. The smoke concentration is gradually increased, the smoke is diffused to the point type smoke-sensitive fire detector, the smoke is sampled by the air-breathing type smoke-sensitive detector, and the response time, the sensitivity and other performances of the fire detector are tested.
During a fire extinguishing test, the oil discs can be ignited in the cabinet and the power distribution cabinet respectively, combustible materials such as cables, plastic shells and the like can be ignited, smoke and high temperature are generated, the alarm performance of the point type temperature-sensing fire detector is tested, and the point type smoke fire detector and the air-breathing type smoke fire detector can detect and record smoke concentration during open fire. The point type smoke fire detector and the suction type smoke fire detector sampling hole on the top surface of the fire laboratory can also detect the response time and sensitivity of the fire detector in the cabinet and the power distribution cabinet.
After the precombustion certain time, the temperature of thermocouple, the flue gas concentration of production, thermal radiation value isoparametric all rise fast, open gaseous extinguishing device, and this test system can test the fire extinguishing effect of multiple gaseous extinguishing agent to and the fire extinguishing effect of the different modes of putting out a fire of same extinguishing agent. Firstly, opening a fire extinguishing agent nozzle on the top surface of a fire laboratory to spray and extinguish the whole fire laboratory space; secondly, a spray head in the cabinet or the power distribution cabinet with the fire is opened to locally extinguish the fire; and thirdly, opening the nozzles inside the multiple cabinets or power distribution cabinets which simultaneously generate fire, and locally extinguishing the fire. The fire extinguishing effect of different modes of putting out a fire of contrast can provide experimental support to the optimal design of extinguishing device and pipeline, shower nozzle.
The fire extinguishing test system for the cabinet and the power distribution cabinet can test the detection performance of different fire detectors, and comprises low-concentration smoke particles in a cable heating smoldering stage and high-concentration smoke and temperature change in an open fire stage. And testing the fire alarm positioning function of the fire detector to different independent spaces. The applicability of the gas fire extinguishing device for testing different fire extinguishing media to the fire disasters of the cabinets and the power distribution cabinets and the effect of extinguishing fire for a single or a plurality of cabinets are tested. Data such as combustion temperature, thermal radiation value, gas component concentration generated by combustion and the like in the test process are collected through a high-temperature thermocouple, a bolometer, a composite gas analyzer and the like, and the test result is scientifically analyzed.
According to the fire extinguishing test system for the equipment cabinets and the power distribution cabinets, the equipment cabinets and the power distribution cabinets are arranged side by side, so that the detection alarm performance of multiple types of fire detectors can be tested, particularly, the air suction type smoke-sensing fire detectors can be used for testing the alarm positioning function of the fire detection system; the fire extinguishing test is suitable for various gas fire extinguishing agents, and can test the fixed-point release fire extinguishing effect of the pipe network type fire extinguishing system.
Example 2
An embodiment 2 of the present invention provides a working method of a fire extinguishing test system for a cabinet and a power distribution cabinet as in embodiment 1, including the following steps:
(1) And starting an infrared camera to start shooting, and starting recording equipment such as an intelligent temperature recorder, a bolometer, a composite gas detector and the like to start collecting and recording data.
(2) And starting fire detection and gas fire extinguishing devices such as a suction type smoke-sensing fire detector, a fire linkage controller and the like.
(3) The smoke fire detector was tested. And starting the cable overload tester, loading large current, generating high temperature to enable the cable to generate thermolysis particles until the air suction type smoke fire detector and the point type smoke fire detector send out multi-stage fire early warning. And recording data such as smoke concentration, alarm time and the like of fire alarm. Because the smog diffusion takes time, and the conflagration laboratory is bigger than rack or switch board space moreover, and smog concentration can dilute, so the smoke fire detector at conflagration laboratory top must have the lag than the inside smoke fire detector alarm time of rack or switch board. Differences in response time of fire detectors at different installation locations can be compared and tested.
(4) The temperature-sensitive fire detector was tested. The bottom of the oil pan is filled with water, 500ml of n-heptane is poured into the oil pan, and the liquid level is 50-60 mm away from the upper edge of the oil pan. The oil pan is placed on the oil pan bracket on the bottom surface of the cabinet and is positioned below the wire casing cable. The tester opens the cabinet door, ignites the n-heptane in the oil pan, and closes the cabinet door quickly. And igniting free combustion of cables, circuit breakers and the like, and observing temperature change acquired by the thermocouple. The point type temperature-sensing fire detector gives an alarm and records the temperature during the alarm.
(5) Fire extinguishing test of the gas fire extinguishing device. The bottom of the oil pan is filled with water, 500ml of n-heptane is poured into the oil pan, and the liquid level is 50-60 mm away from the upper edge of the oil pan. The oil pan is placed on the oil pan bracket and is positioned below the wire casing cable. The test person opened the cabinet door, ignited the n-heptane in the oil pan, and quickly closed the cabinet door. And igniting the cables, the circuit breakers and the like to burn freely for 2 minutes, and starting the gas fire extinguishing device. The fire extinguishing device can open the spray head at the top of the cabinet where the fire hazard occurs or open the large-flow spray head at the top of the fire test room to compare the fire extinguishing effects of different fire extinguishing modes.
(6) After the spraying of the gas fire extinguishing device is finished, the test space is kept sealed for 10min. After 10min, the cabinet door is opened to observe whether the re-combustion is carried out. If the fire extinguishing system can not extinguish the flame after the spraying is finished or the cabinet door is opened for re-burning, the tester extinguishes the fire manually by the fire extinguisher.
(7) The method comprises the steps of deriving test data such as test videos, temperature, smoke concentration, thermal radiation values and gas concentration generated by combustion, recording data such as fire extinguishing effect, fire extinguishing dosage, fire extinguishing concentration and fire extinguishing time, analyzing the influence of different fire degrees and fire extinguishing dosage on the fire extinguishing effect, and analyzing the changes of the temperature, smoke concentration, thermal radiation values and gas concentration of different combustion stages and fire extinguishing stages.
(8) And (4) repeating the steps (3) to (7) for 3 times, and recording the alarm values, the alarm time and the like of the air-breathing type smoke fire detector, the point type smoke fire detector and the point type temperature fire detector obtained in the 3 times of tests, the thermocouple temperature values, the thermal radiation values and the changes of the concentration values of various gases generated by combustion in each position in the 3 times of fire extinguishing tests, the used fire extinguishing dose and the like.
(9) And (3) replacing the gas fire extinguishing agents (perfluorohexanone, heptafluoropropane, carbon dioxide and the like) in the fire extinguishing agent storage tank to perform the steps (5) to (8), and comparing the fire extinguishing concentration, the fire extinguishing amount, the fire extinguishing effect and the like of different gas fire extinguishing agents.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a fire extinguishing test system to rack and switch board which characterized in that: the fire disaster detection system comprises a fire disaster laboratory and a control room, wherein a plurality of cabinets and power distribution cabinets are arranged in the fire disaster laboratory, and a fire extinguishing agent storage tank, a fire disaster linkage controller and an air suction type smoke fire detector connected with the fire disaster linkage controller are arranged in the control room;
the top and the middle part of the fire laboratory are respectively provided with an air-breathing smoke-sensing fire detector sampling pipe connected with the air-breathing smoke-sensing fire detector, and the air-breathing smoke-sensing fire detector sampling pipe is provided with a plurality of air path control valves; a gas circuit control valve on a sampling pipe of an air-breathing smoke-sensing fire detector in the middle of a fire laboratory is connected with a capillary sampling pipe, and the end part of the capillary sampling pipe extends into the cabinet and the power distribution cabinet and is used for extracting air in the cabinet body; different gas circuit control valves are opened in turn in a time-sharing manner, and air samples of a fire laboratory or different cabinets or power distribution cabinets are collected respectively;
fire extinguishing agent pipelines connected with the fire extinguishing agent storage tank are distributed at the top and the middle of the fire disaster laboratory, a plurality of fire extinguishing agent electromagnetic valves are arranged on the fire extinguishing agent pipelines, the fire extinguishing agent electromagnetic valves are connected with the fire disaster linkage controller, and the fire extinguishing agent electromagnetic valves are connected with fire extinguishing agent nozzles; and the fire extinguishing agent nozzle on the fire extinguishing agent pipeline in the middle of the fire disaster laboratory extends into the cabinet and the power distribution cabinet.
2. Fire extinguishing test system for cabinets and cabinets according to claim 1, characterized in that: the top of fire laboratory, rack and switch board all installs some type temperature sensing fire detector and some type smoke fire detector, some type temperature sensing fire detector and some type smoke fire detector all with fire linkage controller connects.
3. Fire extinguishing test system for cabinets and cabinets according to claim 1, characterized in that: a composite gas analyzer connected with the fire linkage controller is also arranged in the control room;
a plurality of composite gas analyzer air suction pipes are arranged on the side walls of the fire test room, the cabinet and the power distribution cabinet;
the compound gas analyzer is connected with the compound gas analyzer through a gas suction pipe.
4. Fire extinguishing test system for cabinets and cubicles according to claim 1, characterized in that: an intelligent temperature recorder connected with the fire linkage controller is further arranged in the control room;
a plurality of thermocouples are uniformly arranged on the side walls of the fire laboratory, the cabinet and the power distribution cabinet;
the thermocouple is connected to the intelligent temperature recorder.
5. Fire extinguishing test system for cabinets and cabinets according to claim 1, characterized in that: the control room is also internally provided with a bolometer connected with the fire linkage controller;
a plurality of heat radiation sensors are arranged on the side walls of the cabinet and the power distribution cabinet;
the bolometer is connected to the thermal radiation sensor.
6. Fire extinguishing test system for cabinets and cabinets according to claim 1, characterized in that: a plurality of equipment cases are arranged in one cabinet, and a trunking cable is arranged below the equipment cases.
7. Fire extinguishing test system for cabinets and cubicles according to claim 1, characterized in that: a plastic shell is arranged in one power distribution cabinet, and a trunking cable is arranged below the plastic shell.
8. A fire extinguishing test system for cabinets and switch boards according to any one of claims 6 or 7, characterized in that: and the trunking cable is connected with a cable overload tester in the fire test room.
9. A fire extinguishing testing system for cabinets and switchboards according to any one of claims 6 and 7, characterized in that: an oil pan support is arranged below the wire casing cable, an oil pan is placed on the oil pan support, and the oil pan is used for injecting n-heptane to ignite the cable.
10. A method of operating a fire extinguishing testing system for cabinets and cabinets according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
starting the fire linkage controller and the air suction type smoke fire detector;
when smoke is generated, the fire linkage controller controls different gas path control valves to be opened in turn in a time-sharing manner, respectively collects air samples of a fire laboratory or different cabinets or power distribution cabinets and transmits the air samples to the air-breathing type smoke-sensing fire detector until the air-breathing type smoke-sensing fire detector gives an alarm and displays the gas path control valve which is opened when the alarm is given;
and after a period of time after flame is generated, the fire linkage controller controls fire extinguishing agent electromagnetic valves at different positions to be opened, so that the gaseous fire extinguishing agent in the fire extinguishing agent storage tank is sprayed out through the fire extinguishing agent spray head.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116359441A (en) * | 2023-04-03 | 2023-06-30 | 南京华彭科技有限公司 | Drawer type cabinet for flue gas online monitoring system and application thereof |
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Application publication date: 20221220 |