CN115855554A - Small-scale ship engine room fire experiment platform for different ventilation conditions and experiment method thereof - Google Patents
Small-scale ship engine room fire experiment platform for different ventilation conditions and experiment method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of fire safety, in particular to a small-scale ship engine room fire experiment platform for different ventilation conditions and an experiment method thereof; a cabin surrounding well is arranged in the middle of the top plate of the ship cabin, the cabin surrounding well is communicated with the inside of the ship cabin, and the upper end of the cabin surrounding well is provided with a hinged end cover; the front part of the top plate is provided with a pair of air inlets, and the rear part of the top plate is provided with a pair of air outlets; the mechanical ventilation system comprises a blower and an exhaust fan, the blower is respectively communicated with the pair of air inlets through an air supply pipe, and the exhaust fan is respectively communicated with the pair of air outlets through an exhaust pipe; when the air feeder and the exhaust fan are started, the mechanical ventilation system is started; when the air blower and the exhaust fan are closed, the mechanical ventilation system is closed; when the upper end cover of the cabin surrounding well is opened, natural ventilation is started; when the upper end cover of the cabin surrounding well is closed, natural ventilation is closed; therefore, the invention can research the fire behavior, the smoke flow and the smoke control mechanism in the small-scale cabin fire under different ventilation conditions.
Description
Technical Field
The invention relates to the technical field of fire safety, in particular to a small-scale ship engine room fire experiment platform for different ventilation conditions and an experiment method thereof.
Background
In the case of a marine fire, the engine room is the most common location for the fire. When a fire disaster occurs in the cabin, the high-temperature smoke can not only damage equipment and structures through heat radiation, but also influence the escape and rescue actions of people. Generally, the generation, spread and control of fire smoke are mainly dependent on factors such as combustible burning conditions, building structures and ventilation conditions, and are also influenced by various relevant factors in the smoke generation and movement processes. Therefore, the understanding of the development law of the engine room fire and the filling characteristics of the smoke, especially the fire behavior under different ventilation, is of great significance for improving the fire safety level of the ship.
The existing test platform for researching the fire of the ship engine room mainly uses a small-scale platform, and can realize the experiment of the smoke spreading process in the engine room under a closed condition, the experiment of the liquid fire of the engine room under a shaking condition, the experiment of the fire of the engine room with an opening at the top under the action of environmental wind and the like. In order to research the fire smoke spreading rule of the engine room under different mechanical ventilation conditions, a large-scale engine room fire experiment platform is developed by the predecessor. However, such large-scale experiments require a large amount of manpower and material resources, and the experiment period is long.
The small-scale model experiment can save research cost and can approximately reflect the development process of the cabin fire and the fire hazard of the cabin fire. However, the existing small-scale cabin experimental platform cannot meet the requirements of developing cabin fire in different mechanical ventilation (mechanical ventilation, natural ventilation) and other scenes, so that a new cabin experimental platform and an experimental method thereof are needed to be invented.
Disclosure of Invention
The invention aims to provide a small-scale ship engine room fire experiment platform and an experiment method thereof for different ventilation conditions, which can be used for researching the development process, self-extinguishing behavior and fire smoke filling process of ventilation on fire in a ship engine room under a small-scale condition.
In order to achieve the purpose, the invention adopts the following technical scheme:
a small-scale ship cabin fire experiment platform for different ventilation conditions comprises a cabin, a fire source and a measuring device;
the cabin comprises a ship cabin 1 with an inverted trapezoid shape, a lifting mechanism 2 and a mechanical ventilation system;
the side walls of the ship cabin 1 are respectively provided with a fireproof glass observation window 11, and the front side wall is provided with a cabin door 12;
a supporting frame 3 for supporting the ship cabin is arranged outside the ship cabin 1, the lifting mechanism 2 is arranged at the upper end of the supporting frame 3, and a top plate 13 of the ship cabin 1 is movably arranged at the top of the ship cabin 1 through the lifting mechanism 2;
a rectangular cabin surrounding well 14 is arranged in the middle of the top plate 13, the cabin surrounding well 14 is communicated with the inside of the ship cabin 1, and the upper end of the cabin surrounding well 14 is a hinged end cover;
the front part of the top plate 13 is provided with a pair of air inlets 15, and the rear part of the top plate 13 is provided with a pair of air outlets 16;
the mechanical ventilation system comprises a blower 41 and an exhaust fan 42, wherein the blower 41 is respectively communicated with a pair of air inlets 15 through a blower pipe 43, and the exhaust fan 42 is respectively communicated with a pair of air outlets 16 through an exhaust pipe 44;
a pair of rectangular diesel engine models 17 are arranged in the middle of the ship cabin 1 in parallel at intervals, and a pair of short cylindrical exhaust pipe models are arranged at the upper end of each diesel engine model;
the fire source and measuring device comprises a fire source device, more than 7 thermocouple trees 51, more than 1 flue gas analyzer 52 and a computer system;
the fire source device comprises an oil pan fire device 53 for simulating surface fire, and a fire spraying device 54 for simulating oil leakage point fire of the pipeline;
the oil pan fire device 53 is arranged in the middle between the pair of diesel models 17, or on the opposite outer side of one of the diesel models and near the corresponding air supply port, and the jet fire device 54 is arranged in the middle of the opposite outer side of the other diesel model;
3 thermocouple trees 51 are uniformly arranged in the ship cabin 1 corresponding to the lower part of the cabin surrounding well 14, thermocouple trees 51 are respectively arranged at the corresponding positions of 4 right angles in the ship cabin 1, and each thermocouple tree 51 comprises more than 5 single thermocouples which are uniformly arranged in the vertical direction;
the smoke analyzer 52 is respectively arranged at the outer edge of the oil pan of each oil pan fire device 53;
during the experiment, the height of the top plate 13 is adjusted through the lifting mechanism 2, the fire source and the measuring device are arranged, the mechanical ventilation system is opened or closed, the oil pan fire device 53 or the fire spraying device 54 is ignited remotely, and the combustion experiment is carried out; the data measured by each single thermocouple and flue gas analyzer 52 is transmitted via signals to a computer system, which stores the analytical data.
Further, the blower 41 and the exhaust fan 42 are both variable frequency centrifugal fans, and the rated air volume of the blower 41 is 161m 3 H; rated air volume of the exhaust fan 42 is 197m 3 /h。
Further, the lifting mechanism 2 comprises a motor 21, a transmission rod 22 and a pair of rotating rods 23, the transmission rod 22 is horizontally arranged at the front end of the support frame 3, and the pair of rotating rods 23 is horizontally arranged at two sides of the support frame 3;
the output shaft of the motor 21 is connected to the middle of the transmission rod 22, two ends of the transmission rod 22 are correspondingly connected to one ends of a pair of rotating rods 23 through a pair of converters 24, two ends of each rotating rod are connected to the upper ends of vertically arranged worms 26 through lifters 25, and the lower end of each worm 26 is fixedly connected with the top plate 13.
Further, the support frame 3 comprises a frame in a cubic shape, the frame is arranged outside the ship cabin 1 in a matching manner, the side surface of the frame is uniformly provided with reinforcing upright posts, and inclined struts 31 are uniformly arranged on the inclined wall surfaces corresponding to the two sides of the ship cabin 1;
the frame is provided with 4 air duct support columns 32 which are respectively used for supporting horizontal overhanging sections of an air supply duct 43 and an exhaust duct 44.
Further, the oil pan fire device 53 comprises an oil pan and an electronic balance, wherein the diameter of the oil pan is 20-40 cm;
the oil pan was set on an electronic balance which was used to obtain the mass loss of the oil pan fire and based on this calculate the fire source power.
Further, the fire injection device 54 includes a nozzle, a pressure regulating valve, a pressure pump and an oil tank, and the nozzle is sequentially communicated with the pressure regulating valve, the pressure pump and the oil tank through a pipeline.
The invention also comprises an experimental method of the small-scale ship cabin fire experiment platform for different ventilation conditions, which specifically comprises the following steps:
step 1): before the experiment, the state of the experiment platform is checked, the accurate connection of a computer system is realized, and the experiment environment parameters are recorded;
step 2): lifting the top plate 13 by the lifting mechanism 2, enabling personnel to enter the interior of the ship cabin 1 through the cabin door 12, and arranging a thermocouple tree 51 and a smoke analyzer 52 at a measuring point; selecting an oil pan fire device 53 according to the experimental working condition A;
and step 3): oil with a specified thickness is poured into an oil pan of the oil pan fire device 53, the hatch door 12 is closed, and the position of the top plate 13 is restored through the lifting mechanism 2;
step 4): according to the experimental working condition A, starting the mechanical ventilation system, namely starting the air blower 41 and the exhaust fan 42;
step 5): the ignition personnel carry out remote ignition and pay attention to observe the internal condition of the ship cabin 1;
step 6): stopping the data acquisition of the computer system after the fuel is burnt out for 5min, and storing experimental data;
step 7): the mechanical ventilation system is kept in an opening state continuously, when the internal environmental condition of the ship cabin 1 is recovered to a normal environment, the cabin door 12 is opened, the interior of the ship cabin 1 is cleaned, and the experiment platform is reset;
step 8): selecting an experiment working condition B, closing a mechanical ventilation system, selecting an oil pan fire device 53, and repeating the steps 1) to 7);
step 9): selecting an experimental working condition C, closing the mechanical ventilation system, opening an upper end cover of the cabin surrounding well 14, namely opening natural ventilation, selecting an oil pan fire device 53, and repeating the steps 1) -7);
step 10): selecting an experiment working condition D, closing a mechanical ventilation system, closing natural ventilation, selecting an oil pan fire device 53, and repeating the steps 1) to 7);
step 11): selecting the fire injection device 54 according to requirements, selecting different ventilation states, and repeating the steps 1) to 7) to realize other experimental working conditions;
step 12): and analyzing and comparing the obtained experimental data of each experimental working condition by the computer system to obtain a simulation experiment rule.
The invention has the following beneficial technical effects:
(1) The invention relates to a small-scale ship cabin fire experiment platform for different ventilation conditions, which comprises a cabin, a fire source and a measuring device, wherein the cabin is provided with a plurality of air outlets; the cabin comprises an inverted trapezoid-shaped ship cabin, a lifting mechanism and a mechanical ventilation system; a rectangular cabin surrounding well is arranged in the middle of the top plate of the ship cabin, the cabin surrounding well is communicated with the inside of the ship cabin, and the upper end of the cabin surrounding well is provided with a hinged end cover; the front part of the top plate is provided with a pair of air inlets, and the rear part of the top plate is provided with a pair of air outlets; the mechanical ventilation system comprises a blower and an exhaust fan, the blower is respectively communicated with the pair of air inlets through an air supply pipe, and the exhaust fan is respectively communicated with the pair of air outlets through an exhaust pipe;
when the air feeder and the exhaust fan are started, the mechanical ventilation system is started; when the air blower and the exhaust fan are closed, the mechanical ventilation system is closed; when the upper end cover of the cabin surrounding well is opened, natural ventilation is started; when the upper end cover of the cabin surrounding well is closed, the natural ventilation is closed; therefore, the invention can research the fire behavior, the smoke flow and the smoke control mechanism in the small-scale cabin fire under different ventilation conditions.
(2) The top plate of the ship cabin is movably arranged at the top of the ship cabin through a lifting mechanism; the roof has liftable function, changes cabin structure size through the lifting roof, and then can study the commonality law of cabin conflagration under the different aspect ratio condition, further verifies current cabin conflagration model.
(3) The invention comprises a fire source and measuring device, which comprises a fire source device, more than 7 thermocouple trees, more than 1 flue gas analyzer and a computer system; the fire source device comprises an oil pan fire device for simulating surface fire and a fire spraying device for simulating pipeline oil leakage point fire; the fire source quality, temperature and gas concentration during the cabin fire can be obtained, and further the cabin fire development and the smoke settlement rule can be obtained.
(4) The invention has controllable experimental process, high repeatability and convenient operation.
Drawings
Fig. 1 is a schematic structural diagram of a small-scale ship cabin fire experiment platform for different ventilation conditions.
Fig. 2 is a rear schematic view of a small-scale ship cabin fire experiment platform for different ventilation conditions.
Fig. 3 is a front view of a small-scale ship cabin fire experiment platform for different ventilation situations.
FIG. 4 is a schematic structural diagram of a diesel engine model in a small-scale marine engine room fire experiment platform for different ventilation conditions.
Fig. 5 is a top view of a small-scale ship cabin fire experiment platform for different ventilation situations.
Fig. 6 is a schematic diagram of a ventilation system structure of a small-scale ship cabin fire experiment platform for different ventilation situations.
Fig. 7 is a schematic structural diagram of a lifting system of a small-scale ship cabin fire experiment platform for different ventilation conditions.
FIG. 8 is an enlarged view of a portion of FIG. 7 in accordance with the present invention.
Fig. 9 is a schematic diagram of the fire source position of a small-scale ship cabin fire experiment platform for different ventilation conditions.
Fig. 10 is a schematic diagram of a measuring system of a small-scale ship cabin fire experiment platform for different ventilation situations.
Wherein: the device comprises a ship cabin 1, a fireproof glass observation window 11, a cabin door 12, a top plate 13, a cabin surrounding well 14, a pair of air inlets 15, a pair of air outlets 16, a diesel engine model 17, a lifting mechanism 2, a motor 21, a transmission rod 22, a pair of rotating rods 23, a pair of converters 24, a lifter 25, a worm 26, a support frame 3, an inclined strut 31, a wind pipe support column 32, a blower 41, an exhaust fan 42, a wind supply pipe 43, an exhaust pipe 44, a thermocouple tree 51, a smoke analyzer 52, an oil pan fire device 53 and a fire spraying device 54.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration only.
Example 1
Referring to fig. 1-10, a small-scale ship cabin fire experiment platform for different ventilation conditions comprises a cabin, a fire source and a measuring device;
the cabin comprises a ship cabin 1 with an inverted trapezoid shape, a lifting mechanism 2 and a mechanical ventilation system;
the side walls of the ship cabin 1 are respectively provided with a fireproof glass observation window 11, and the front side wall is provided with a cabin door 12;
a supporting frame 3 for supporting the ship cabin is arranged outside the ship cabin 1, the lifting mechanism 2 is arranged at the upper end of the supporting frame 3, and a top plate 13 of the ship cabin 1 is movably arranged at the top of the ship cabin 1 through the lifting mechanism 2;
a cuboid cabin surrounding well 14 is arranged in the middle of the top plate 13, the cabin surrounding well 14 is communicated with the inside of the ship cabin 1, and the upper end of the cabin surrounding well 14 is a hinged end cover;
the front part of the top plate 13 is provided with a pair of air inlets 15, and the rear part of the top plate 13 is provided with a pair of air outlets 16;
the mechanical ventilation system comprises a blower 41 and an exhaust fan 42, wherein the blower 41 is respectively communicated with a pair of air inlets 15 through a blower pipe 43, and the exhaust fan 42 is respectively communicated with a pair of air outlets 16 through an exhaust pipe 44;
a pair of rectangular diesel engine models 17 are arranged in parallel at intervals in the middle of the ship cabin 1, and a pair of short cylindrical exhaust pipe models are arranged at the upper end of each diesel engine model;
the fire source and measuring device comprises a fire source device, more than 7 thermocouple trees 51, more than 1 flue gas analyzer 52 and a computer system;
the fire source device comprises an oil pan fire device 53 for simulating surface fire, and a jet fire device 54 for simulating pipeline oil leakage point fire;
the oil pan fire device 53 is arranged in the middle between the pair of diesel models 17, or on the opposite outer side of one of the diesel models and near the corresponding air supply port, and the jet fire device 54 is arranged in the middle of the opposite outer side of the other diesel model;
3 thermocouple trees 51 are uniformly arranged in the ship cabin 1 corresponding to the lower part of the cabin surrounding well 14, thermocouple trees 51 are respectively arranged at the corresponding positions of 4 right angles in the ship cabin 1, and each thermocouple tree 51 comprises more than 5 single thermocouples which are uniformly arranged in the vertical direction;
the smoke analyzer 52 is respectively arranged at the outer edge of the oil pan of each oil pan fire device 53;
during the experiment, the height of the top plate 13 is adjusted through the lifting mechanism 2, the fire source and the measuring device are arranged, the mechanical ventilation system is opened or closed, the oil pan fire device 53 or the fire spraying device 54 is ignited remotely, and the combustion experiment is carried out; the data measured by each single thermocouple and flue gas analyzer 52 is transmitted via signals to a computer system, which stores the analytical data.
The blower 41 and the exhaust fan 42 are both frequency conversion centrifugal fans, and the rated air volume of the blower 41 is 161m 3 H; rated air volume of the exhaust fan 42 is 197m 3 /h。
The lifting mechanism 2 comprises a motor 21, a transmission rod 22 and a pair of rotating rods 23, the transmission rod 22 is horizontally arranged at the front end of the support frame 3, and the pair of rotating rods 23 are horizontally arranged at two sides of the support frame 3;
the output shaft of the motor 21 is connected to the middle of the transmission rod 22, two ends of the transmission rod 22 are correspondingly connected to one ends of a pair of rotating rods 23 through a pair of converters 24, two ends of each rotating rod are connected to the upper ends of vertically arranged worms 26 through lifters 25, and the lower end of each worm 26 is fixedly connected with the top plate 13.
The supporting frame 3 comprises a cubic frame, the frame is arranged outside the ship cabin 1 in a matching way, the side surface of the frame is uniformly provided with reinforcing upright posts, and inclined struts 31 are uniformly arranged corresponding to the inclined wall surfaces on the two sides of the ship cabin 1;
the frame is provided with 4 air duct support columns 32 which are respectively used for supporting horizontal overhanging sections of an air supply duct 43 and an exhaust duct 44.
The oil pan fire device 53 comprises an oil pan and an electronic balance, and the diameter of the oil pan is 20 to 40cm;
the oil pan was set on an electronic balance which was used to obtain the mass loss of the oil pan fire and based on this calculate the fire source power.
The fire injection device 54 comprises a spray head, a pressure regulating valve, a pressure pump and an oil tank, wherein the spray head is sequentially communicated with the pressure regulating valve, the pressure pump and the oil tank through pipelines.
Example 2
The experimental method of the small-scale ship cabin fire experiment platform for different ventilation conditions in embodiment 1 specifically comprises the following steps:
step 1): before the experiment, the state of the experiment platform is checked, the accurate connection of a computer system is realized, and the experiment environment parameters are recorded;
step 2): the top plate 13 is lifted by the lifting mechanism 2, personnel enter the interior of the ship cabin 1 through the cabin door 12, and a thermocouple tree 51 and a smoke analyzer 52 are arranged at a measuring point; selecting an oil pan fire device 53 according to the experimental working condition A;
and step 3): oil with a specified thickness is poured into an oil pan of the oil pan fire device 53, the hatch door 12 is closed, and the position of the top plate 13 is restored through the lifting mechanism 2;
step 4): according to the experimental working condition A, starting the mechanical ventilation system, namely starting the air blower 41 and the exhaust fan 42;
step 5): the ignition personnel carry out remote ignition and pay attention to observe the internal condition of the ship cabin 1;
step 6): stopping the data acquisition of the computer system after the fuel is burnt out for 5min, and storing experimental data;
step 7): the mechanical ventilation system is kept in an opening state continuously, when the internal environmental condition of the ship cabin 1 is recovered to a normal environment, the cabin door 12 is opened, the interior of the ship cabin 1 is cleaned, and the experiment platform is reset;
step 8): selecting an experiment working condition B, closing a mechanical ventilation system, selecting an oil pan fire device 53, and repeating the steps 1) -7);
step 9): analyzing and comparing the obtained experimental data of each experimental working condition by the computer system to obtain a table 1;
TABLE 1 comparison curve of characteristic values of experiments under working conditions A and B
As can be seen from Table 1, both the average and peak mass loss rates are significantly greater for condition A than for condition B. The vertical peak temperature and the maximum average temperature in the cabin under the working condition A are both obviously higher than those under the working condition B. The oxygen reduction amount of the working condition A is obviously less than that of the working condition B, and the carbon monoxide increase amount of the working condition A is obviously less than that of the working condition B. The carbon dioxide increase for condition a is significantly less than for condition B. In conjunction with the mass loss profile, it can be seen that the opening of the mechanical ventilation has a significant effect on the combustion of the oil sump. Mainly because of the opening of the mechanical ventilation, the continuous supply of oxygen to the combustion of the pool fire. With otherwise identical boundary conditions, opening the mechanical ventilation will facilitate the burning of the pool fire, and the burning rate will be greater.
Therefore, the device can effectively simulate the development process of the ship engine room fire and provide data support for the development and practice of ship fire prevention and control and ship safety technology.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a small-scale marine engine room conflagration experiment platform for different ventilation situations which characterized in that: comprises a cabin, a fire source and a measuring device;
the cabin comprises a ship cabin (1) with an inverted trapezoid shape, a lifting mechanism (2) and a mechanical ventilation system;
fireproof glass observation windows (11) are respectively arranged on the side surfaces of the ship cabin (1), and a cabin door (12) is arranged on the front side surface;
a supporting frame (3) for supporting the ship cabin is arranged outside the ship cabin (1), the lifting mechanism (2) is arranged at the upper end of the supporting frame (3), and a top plate (13) of the ship cabin (1) is movably arranged at the top of the ship cabin (1) through the lifting mechanism (2);
the middle part of the top plate (13) is provided with a rectangular cabin surrounding well (14), the cabin surrounding well (14) is communicated with the inside of the ship cabin (1), and the upper end of the cabin surrounding well (14) is provided with a hinged upper end cover;
the front part of the top plate (13) is provided with a pair of air inlets (15), and the rear part of the top plate (13) is provided with a pair of air outlets (16);
the mechanical ventilation system comprises a blower (41) and an exhaust fan (42), the blower (41) is respectively communicated with a pair of air inlets (15) through a blower pipe (43), the exhaust fan (42) is respectively communicated with a pair of air outlets (16) through an exhaust pipe (44), and the blower pipe (43) and the exhaust pipe (44) are telescopic air pipes;
a pair of cuboid diesel engine models (17) are arranged in parallel at intervals in the middle of the ship cabin (1), and a pair of short cylindrical exhaust pipe models are arranged at the upper end of each diesel engine model;
the fire source and measuring device comprises a fire source device, more than 7 thermocouple trees (51), more than 1 flue gas analyzer (52) and a computer system;
the fire source device comprises an oil pan fire device (53) for simulating the fire of the fuel leakage accumulated on the bottom surface, and a jet fire device (54) for simulating the fire of the fuel leakage of the pipeline;
the oil pan fire device (53) is arranged in the middle between the pair of diesel engine models (17), or on the opposite outer side of one diesel engine model and close to the corresponding air supply opening, and the jet fire device (54) is arranged in the middle of the opposite outer side of the other diesel engine model;
3 thermocouple trees (51) are uniformly arranged in the ship cabin (1) corresponding to the lower part of the cabin surrounding well (14), 4 right-angle corresponding positions in the ship cabin (1) are respectively provided with the thermocouple trees (51), and each thermocouple tree (51) comprises more than 5 single thermocouples which are vertically and uniformly arranged;
the outer edge of the oil pan of each oil pan fire device (53) is respectively provided with the smoke analyzer (52);
during the experiment, the height of the top plate (13) is adjusted through the lifting mechanism (2), the fire source and the measuring device are arranged, the mechanical ventilation system is opened or closed, the oil pan fire device (53) or the fire spraying device (54) is ignited remotely, and the combustion experiment is carried out; the data measured by each single thermocouple and flue gas analyzer (52) is transmitted by signals to a computer system, which stores the analytical experimental data.
2. The small-scale marine engine room fire experiment platform for different ventilation conditions in accordance with claim 1, wherein: the blower (41) and the exhaust fan (42) are both frequency conversion centrifugal fans, and the rated air volume of the blower (41) is 161m 3 H; rated air volume of the exhaust fan (42) is 197m 3 /h。
3. The small-scale marine engine room fire experiment platform for different ventilation conditions is characterized in that: the lifting mechanism (2) comprises a motor (21), a transmission rod (22) and a pair of rotating rods (23), the transmission rod (22) is horizontally arranged at the front end of the support frame (3), and the pair of rotating rods (23) is horizontally arranged on two sides of the support frame (3);
the output shaft of the motor (21) is connected with the middle part of the transmission rod (22), two ends of the transmission rod (22) are correspondingly connected with one ends of a pair of rotating rods (23) through a pair of converters (24), two end parts of each rotating rod are connected with the upper ends of vertically arranged worms (26) through lifters (25), and the lower end of each worm (26) is fixedly connected with the top plate (13).
4. The small-scale marine engine room fire experiment platform for different ventilation conditions in accordance with claim 1, wherein: the supporting frame (3) comprises a cubic frame, the frame is arranged outside the ship cabin (1) in a matching way, the side surface of the frame is uniformly provided with reinforcing upright posts, and inclined struts (31) are uniformly arranged on the inclined wall surfaces at two sides corresponding to the ship cabin (1);
and 4 air pipe support columns (32) are arranged on the frame and are respectively used for supporting horizontal overhanging sections of the air supply pipe (43) and the exhaust pipe (44).
5. The small-scale marine engine room fire experiment platform for different ventilation conditions in accordance with claim 1, wherein: the oil pan fire device (53) comprises an oil pan and an electronic balance, and the diameter of the oil pan is 20 to 40cm; the oil pan is placed on an electronic balance which is used to obtain the mass loss of the oil pan fire and based on this calculate the fire source power.
6. The small-scale marine engine room fire experiment platform for different ventilation conditions in accordance with claim 1, wherein: the fire injection device (54) comprises a spray head, a pressure regulating valve, a pressure pump and an oil tank, wherein the spray head is sequentially communicated with the pressure regulating valve, the pressure pump and the oil tank through pipelines.
7. The test method for the small-scale ship cabin fire experiment platform under different ventilation conditions, according to claims 1 to 6, comprises the following steps:
step (1): before the experiment, the state of the experiment platform is checked, the accurate connection of a computer system is realized, and the experiment environment parameters are recorded;
step (2): the top plate (13) is lifted through the lifting mechanism (2), personnel enter the ship cabin (1) through the cabin door (12), and a thermocouple tree (51) and a smoke analyzer (52) are arranged at a measuring point; selecting an oil pan fire device (53) according to the experimental working condition A;
and (3): oil with a specified thickness is poured into an oil pan of the oil pan fire device (53), the cabin door (12) is closed, and the position of the top plate (13) is restored through the lifting mechanism (2);
and (4): according to the experimental working condition A, starting a mechanical ventilation system, namely starting a blower (41) and an exhaust fan (42);
and (5): the ignition personnel carry out remote ignition and pay attention to observe the internal condition of the ship cabin (1);
and (6): stopping the data acquisition of the computer system after the fuel is burnt out and 5min later, and storing experimental data;
and (7): the mechanical ventilation system is kept in an opening state continuously, when the internal environmental condition of the ship cabin (1) is recovered to a normal environment, the cabin door (12) is opened, the inside of the ship cabin (1) is cleaned, and the experiment platform is reset;
and (8): selecting an experimental working condition B, closing the mechanical ventilation system, selecting an oil pan fire device (53), and repeating the steps (1) to (7);
and (9): selecting an experimental working condition C, closing the mechanical ventilation system, opening an upper end cover of the cabin surrounding well (14), namely opening natural ventilation, selecting an oil pan fire device (53), and repeating the steps (1) - (7);
step (10): selecting an experiment working condition D, closing a mechanical ventilation system, closing natural ventilation, selecting an oil pan fire device (53), and repeating the steps (1) - (7);
step (11): selecting a fire spraying device (54) according to requirements, selecting different ventilation states, repeating the steps (1) - (7), and realizing other experimental working conditions;
step (12): and analyzing and comparing the obtained experimental data of each experimental working condition by the computer system to obtain a simulation experiment rule.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608566A (en) * | 2023-05-22 | 2023-08-18 | 北京城建设计发展集团股份有限公司 | Intelligent passive energy-saving system for junction underground traffic station based on building integration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608566A (en) * | 2023-05-22 | 2023-08-18 | 北京城建设计发展集团股份有限公司 | Intelligent passive energy-saving system for junction underground traffic station based on building integration |
| CN116608566B (en) * | 2023-05-22 | 2023-12-22 | 北京城建设计发展集团股份有限公司 | Intelligent passive energy-saving system for junction underground traffic station based on building integration |
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