Arched cabin top flashover training device

Abstract

The utility model discloses an arched cabin top flashover training device which comprises an arched narrow-body engine cabin model, the arched narrow-body engine cabin model is of an arched top structure with an inner layer and an outer layer, and a gap is reserved between the arched top of the inner layer and the arched top of the outer layer to form a cooling water interlayer structure. The front section of the arched narrow-body machine cabin model is provided with an ignition source device, the rear section of the arched narrow-body machine cabin model is provided with double-side cabin doors, a fuel gas inlet pipeline and an equipment cabin, the middle section of the arched narrow-body machine cabin model is provided with a luggage compartment, seats and a flashover device, and the fuel gas inlet pipeline is communicated with the interior of the flashover device. Compared with the prior art, the flashover device has the advantages that a traditional fire beam mode is upgraded into a spreading mode conforming to the spreading condition in the actual flashover process, so that fire-fighting training is more combined with the actual condition, and the problem that the top of a cabin is overheated is effectively solved. Meanwhile, the training device can be automatically controlled, and the safety and reliability of training are improved.

Description

Technical Field

[0001] The utility model relates to the field of aircraft fire fighting training, in particular to a fire jumping training device on the top of an arched cabin. Background Art

[0002] The combustibles in the cabin of an aircraft are mainly concentrated in the luggage compartment. When the combustibles in the luggage compartment catch fire, the flame spreads along the top of the arched cabin due to the restriction of the narrow passage structure of the arched cabin. When it reaches the top of the cabin passage and is not restricted by the spatial structure, the flame begins to spread along the top of the passage. Affected by the top structure, the air entrainment of the flame is reduced, resulting in a significant increase in the flame length compared to the flame length without spatial structure restrictions, and the speed of fire plume generation is also significantly accelerated, resulting in a flashover on the top of the cabin. Flashover is different from flashover. The flashover in firefighting training simulates the full fire scene environment in which the combustibles in the entire space are instantly ignited to carry out firefighting and rescue, while flashover simulates the spread of the fire before the flashover occurs, and has the characteristics of spreading along the top and spreading quickly. The existing flashover device uses a single or multiple large-caliber flamethrower tubes in a container or other spatial structure to simulate flashover, so that the space is quickly filled with flames. At this stage, firefighters cannot enter the space to carry out firefighting operations. Firefighting is when firefighters can enter the space to carry out fire control operations before flashover occurs. After reasonable fire control operations are carried out, flashover can be prevented. Due to the fast burning speed of firefighting, cabin firefighting will cause personal injury to airport professional firefighters who open the cabin door or are carrying out firefighting and rescue in the cabin. On the other hand, when the firefighting on the top of the cabin develops to the flashover stage, the combustibles in the lower part of the cabin will be ignited instantly, causing casualties. Airport professional firefighters improve their ability to respond to cabin firefighting and rescue by conducting cabin firefighting response and firefighting training.

[0003] The existing flashover device uses a flame tube that is difficult to control the simulated flame spread process. Instead, it forms a stable fire beam through the pressure of the jet gas itself, which is different from the real fire jump and is not conducive to firefighters to conduct in-cabin training. In addition, the existing fire training device uses rock wool or spray fire retardant coatings for fire protection. Frequent fire training will cause fire protection failure and cause structural damage to the fire training device. Utility Model Content

[0004] In view of the fact that the existing fire fighting training devices are unable to carry out cabin fire jumping training, the utility model provides an arched cabin top fire jumping training device for airport professional fire fighters to carry out cabin fire jumping training.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a fire jumping training device on the top of an arched cabin, comprising an arched narrow-body aircraft cabin model, the arched narrow-body aircraft cabin model is an inner and outer double-layer arched roof structure, a gap is left between the inner arched roof and the outer arched roof to form a cooling water sandwich structure, the front section of the arched narrow-body aircraft cabin model is provided with an ignition source device, the rear section is provided with double-sided cabin doors, a gas intake pipe and an equipment compartment, the middle section of the arched narrow-body aircraft cabin model is provided with a luggage compartment, a seat and a fire jumping device, the fire jumping device is located between the luggage compartments and is arranged on the top surface of the inner arched roof, and the gas intake pipe is connected to the inside of the fire jumping device.

[0006] Preferably, the equipment cabin consists of a cabin body and a cabin door, the cabin body is provided with a ventilation pipe, a gas delivery pipeline and an air supply device, the gas intake pipeline is located in the equipment cabin, and is connected with the spark-over device through the air supply device and the gas delivery pipeline, the middle section of the arched narrow-body aircraft cabin model is connected with the outside through a ventilation pipe, and a ventilation hole is opened at the lower part of the cabin door.

[0007] Preferably, an air intake fan is provided on the ventilation duct, a smoke exhaust fan is provided on the side of the cabin body of the equipment compartment, the upper part of the smoke exhaust fan is located in the luggage compartment, and the lower part is located in the cabin in the middle section of the arched narrow-body aircraft cabin model, a smoke exhaust hole is opened on the side of the luggage compartment, and a smoke exhaust pipe is provided on the top of the cabin body, and the smoke exhaust pipe is connected to the smoke exhaust fan.

[0008] Preferably, the gas supply device consists of a gas-air mixer and a combustion-supporting fan, the gas inlet pipe is connected to the gas inlet port of the gas-air mixer, the combustion-supporting fan is connected to the air inlet port of the gas-air mixer, and the gas delivery pipe is connected to the mixed gas outlet of the gas-air mixer.

[0009] Preferably, the spark jumping device consists of a U-shaped gas pipeline, a baffle and a bidirectional low-speed detector. The curved section of the U-shaped gas pipeline is located at the front section of the arched narrow-body aircraft cabin model, and the horizontal section is arranged along the channel direction of the middle section of the arched narrow-body aircraft cabin model. The U-shaped gas pipeline is fixed on the top surface of the inner arched top. There are several baffles, which are arranged in sequence at intervals along the channel direction of the middle section of the arched narrow-body aircraft cabin model. The baffles are vertically arranged between the horizontal sections of the U-shaped gas pipeline, and the upper ends of the baffles are rotatably connected to the top surface of the inner arched top. Air outlet holes are evenly spaced on the inner side of the U-shaped gas pipeline, and the air outlet holes are located between the baffles. The baffles are provided with a transmission mechanism for adjusting the rotation angle thereof. The top surface of the inner arched top is also provided with a bidirectional low-speed detector for detecting the flame pressure difference.

[0010] Preferably, the transmission mechanism is driven by a motor, which is installed in the luggage compartment and is linked to the bidirectional low-speed detector for control.

[0011] Preferably, the bidirectional low-speed detector is located at the rear end of the inner arch top and is spaced 3.5 m from the nearest baffle.

[0012] Preferably, the combustion port of the ignition source device is located at the gas outlet of the curved section of the U-shaped gas pipeline.

[0013] Preferably, the ignition source device consists of a bent pipe, an igniter and a combustible gas ignition pipe, one end of the bent pipe is opened downward to form a combustion port, the igniter and the combustible gas ignition pipe are arranged in the bent pipe, and a flame monitor for detecting the flame state of the ignition source device is also provided on the combustion port of the bent pipe, and an electromagnetic switch valve is connected to the combustible gas ignition pipe.

[0014] Preferably, a cooling system is provided on the cooling water sandwich structure, and the cooling system consists of a cooling water pipe and a nozzle. There are several nozzles, all of which are located in the cooling water sandwich structure and are evenly spaced along the length direction of the arched narrow-body aircraft cabin model. The cooling water pipe is installed on the top of the arched narrow-body aircraft cabin model and is connected with the interior of the cooling water sandwich structure through the nozzle. A drain outlet is provided at the bottom of the arched narrow-body aircraft cabin model, and the drain outlet is connected with the interior of the cooling water sandwich structure.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] (1) The utility model automatically adjusts the length of the flame zone by changing the angle of the baffle according to the movement of the flame, and uses the U-shaped tube small hole to make the flame spread according to the direction of the gas flow. The flame beam mode using the flame tube to generate a strong impact in the prior art is upgraded to a flame spreading mode along the top of the arched roof that is consistent with the actual fire jump process. This makes firefighting training more in line with the actual situation, and avoids the problem that the fire beam generated by the traditional flame tube generates impact thermal stress on the top of the cabin, resulting in a reduction in the service life of the training device. In addition, a cooling system is set inside the double-layer arched roof to effectively solve the problem of overheating on the top of the cabin.

[0017] (2) The control of the length of the fire jumping flame zone of the fire jumping training device of the utility model is combined with the training safety of airport firefighters, and a system linkage control method is adopted to realize automatic control of the training device, thereby improving the safety and reliability of training. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the external structure of the utility model;

[0020] Figure 3It is a schematic diagram of the structure of the spark jumping device of the utility model;

[0021] Figure 4 It is a schematic diagram of the distribution structure of the U-shaped gas pipeline of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the utility model bidirectional low-speed detector;

[0023] Figure 6 It is the structural principle diagram of the transmission mechanism of the utility model;

[0024] Figure 7 It is a schematic diagram of the internal structure of the equipment cabin of the utility model;

[0025] Figure 8 It is a structural schematic diagram of the gas supply device of the utility model;

[0026] Fig. 9 It is a structural schematic diagram of the cooling system of the utility model.

[0027] In the figure, 1. Arched narrow-body aircraft cabin model; 11. Double-side cabin doors; 12. Cooling water sandwich structure; 13. Inner arched roof; 14. Outer arched roof; 15. Drainage outlet; 2. Gas intake duct; 3. Equipment compartment; 31. Ventilation duct; 32. Smoke exhaust duct; 33. Hatch door; 331. Ventilation outlet; 34. Intake fan; 35. Smoke exhaust fan; 36. Air supply device; 361. Gas-air mixer; 362. Combustion-supporting fan; 37. Gas delivery pipeline; 4. Spark jumping device; 41. U-shaped gas pipeline; 42. Air outlet; 43. Baffle; 44. Ignition source device; 5. Bidirectional low-speed detector; 6. Transmission mechanism; 7. Seat; 8. Luggage compartment; 81. Smoke exhaust hole; 9. Cooling system; 91. Cooling water pipe; 92. Nozzle. DETAILED DESCRIPTION

[0028] Civil aircraft are divided into wide-body aircraft and narrow-body aircraft. The utility model uses an arched narrow-body aircraft as the cabin model. Due to the limited space conditions in the cabin of a narrow-body aircraft, after the airport's professional fire rescue personnel enter, they will conduct rescue training in an environment with limited space, which more realistically simulates the on-site rescue environment, so as to train rescue personnel to carry out rescue in an environment with limited space.

[0029] The utility model will be further described below. A fire jumping training device on the top of an arched cabin is shown in FIG. Figure 1 and Figure 2, including an arched narrow-body aircraft cabin model 1, the arched narrow-body aircraft cabin model 1 is an inner and outer double-layer arched roof structure, a gap is left between the inner arched roof 13 and the outer arched roof 14 to form a cooling water sandwich structure 12, the front section of the arched narrow-body aircraft cabin model 1 is provided with an ignition source device 44, and the rear section is provided with a double-sided cabin door 11, a gas intake pipe 2 and an equipment compartment 3, the middle section of the arched narrow-body aircraft cabin model 1 is provided with a luggage compartment 7, a seat 7 and a spark-jumping device 4, the spark-jumping device 4 is located between the luggage compartments 7 and is arranged on the top surface of the inner arched roof 13, and the gas intake pipe 2 is connected to the inside of the spark-jumping device 4.

[0030] The spark device 4 is composed of a U-shaped gas pipeline 41, a baffle 43 and a two-way low-speed detector 5. Figure 3 and Figure 4 The curved section of the U-shaped gas pipeline 41 is located at the front section of the arched narrow-body aircraft cabin model 1, and the horizontal section is arranged along the channel direction of the middle section of the arched narrow-body aircraft cabin model 1. The U-shaped gas pipeline 41 is fixed on the top surface of the inner arched roof 13. There are several baffles 43, which are arranged in sequence along the channel direction of the middle section of the arched narrow-body aircraft cabin model 1. The baffles 43 are all vertically arranged between the horizontal sections of the U-shaped gas pipeline 41, and the upper ends of the baffles 43 are rotatably connected to the top surface of the inner arched roof 13. The baffles 43 are arranged at 90° perpendicular to the horizontal plane, and the baffles 43 are arranged in parallel and spaced apart, which are used to adjust the longitudinal propagation speed of the spark and control the longitudinal uniformity of the spark so that it is more consistent with the actual flame propagation process. The U-shaped gas pipe 41 has gas outlet holes 42 evenly spaced apart on its inner side for releasing gas. The gas outlet holes 42 are located between the baffles 43. The baffles 43 are provided with a transmission mechanism 6 for adjusting their rotation angles. The top surface of the inner arched top 13 is also provided with a bidirectional low-speed detector 5 for detecting the flame pressure difference, so that the angle of the baffle 43 can be automatically adjusted according to the flame position, so as to adjust the lateral uniformity of the sparkover and the flame position.

[0031] The fire jumping device 4 of the utility model adopts the method of arranging a U-shaped gas pipeline 41 on the top, opening small holes for gas outlet on the baffle 43 and the front area pipeline, and quickly forming a uniform large-area combustion area on the top of the cabin. In order to enable firefighters to respond quickly after entering the cabin and conduct training, this training device sets the length of the flame area to be controlled within the range of 3.5m from the baffle 43, and sets a two-way low-speed detector 5 to determine the position of the flame, and uses the inclination angle of the baffle 43 to control the length of the flame area. When the pressure difference is 0, the baffle 43 does not rotate, and when the pressure difference is When the flame spreads faster, it means that the flame is in the vigorous flame zone at the measuring point and the flame length is long. At this time, by rotating the baffle 43 in the opposite direction of the flame spread, the flame spread can be prevented from slowing down and the flame zone length can be adjusted. This indicates that the flame zone has not reached the measuring point. Adjusting the baffle 43 along the flame propagation direction can increase the flame propagation speed and increase the flame zone length. The purpose is to keep the flame zone length stable at around 3.5 m.

[0032] The structural design of the U-shaped pipe at the top is to allow the gas to be uniformly dispersed from the small holes of the gas outlet 42. The flame spreads in both the axial and longitudinal directions, and a uniform flame area can be formed at the top of the arch. Unlike the jet fire beam, which mainly impacts in the longitudinal direction, it is quite different from the real fire jump scenario. The longitudinal impact of the fire beam increases with the increase of the fire beam width, and the flame height direction will also increase. When the flame height is at the bottom of the luggage compartment 7, the flame will begin to spread uncontrollably. The baffle 43 is set to adjust the length of the flame. The gas outlet 42 is set between the baffles 43 to control the range of gas flow.

[0033] The two-way low-speed detector 5 is a flame detection sensor, such as Figure 5 The sensor is set along the direction of flame propagation, similar to the static pressure anemometer. The differential pressure sensor is used to measure the pressure difference between the near-fire surface and the back-fire surface along the direction of flame spread. At the same time, a thermocouple is set to measure the temperature at this position and the flame propagation speed at this position is calculated, that is, Where K p =1.046, T is the temperature at that location. This sensor is commonly used in fire tests. The training device of the utility model only uses a two-way low-speed detector 5 to measure the pressure difference, and the output voltage As the input signal of the motor drive.

[0034] The equipment cabin 3 is composed of a cabin body and a cabin door 33. Figure 7 and Figure 8A ventilation pipe 31, a gas delivery pipeline 37 and an air supply device 36 are arranged in the cabin body. The gas intake pipeline 2 is located in the equipment cabin 3 and is connected to the sparkover device 4 through the air supply device 36 and the gas delivery pipeline 37. The middle section of the arched narrow-body aircraft cabin model 1 is connected to the outside through a ventilation pipe 31. An air intake fan 34 is arranged on the ventilation pipe 31. A smoke exhaust fan 35 is arranged on the side of the cabin body of the equipment cabin 3. The smoke exhaust fan 35 is located in the luggage compartment 7. A smoke exhaust hole 81 is opened on the side of the luggage compartment 7. A smoke exhaust pipe 32 is arranged on the top of the cabin body. The air intake fan 34 is located in the equipment cabin 3. At the bottom, the exhaust fan 35 is located at the top of the equipment cabin 3. The two cooperate to form an air intake and exhaust system. The air intake fan 34 can supplement the oxygen required for combustion on the one hand, and on the other hand, it can discharge the hot smoke generated by combustion or the residual combustible gas in the cabin out of the cabin under the joint action of the exhaust fan. When working, air enters the middle section of the arched narrow-body aircraft cabin model 1 from the bottom of the equipment cabin 3 through the air intake fan 34 to supplement the combustion oxygen. The hot smoke from combustion and the gas generated by insufficient combustion enter the equipment cabin 3 through the exhaust fan 35 and are discharged from the exhaust pipe 32 at the top of the equipment cabin 3, thereby reducing the damage of the hot smoke to the model. The lower part of the hatch 33 is provided with a vent 331, which can realize natural ventilation to prevent the equipment cabin 3 from being in a closed space. If the gas intake pipe 2 leaks, the leaked gas will also be discharged from the vent 331 at the lower part of the hatch 33 of the equipment cabin 3 to prevent the accumulation of combustible gas and cause explosion.

[0035] The equipment cabin 3 is exactly where the toilet of the aircraft is located. On the one hand, it is consistent with the actual structure of the aircraft. On the other hand, there are electrical circuits in the equipment cabin 3 that need to be protected. The gas supply device 36 is provided with a valve. If there is a gas leak during use or shutdown, the gas detector can detect that the concentration reaches a certain value and automatically start the ventilation system to exhaust gas. Furthermore, due to the influence of the position of the cabin door 33, directly setting the smoke exhaust fan 35 on the cabin wall will affect the movement of the flame in the flame zone. Without affecting the movement of the flame in the flame zone, a hole can be opened in the side wall of the luggage compartment 7 to discharge the hot smoke from the cabin through the smoke exhaust fan 35 of the equipment cabin 3.

[0036] Since the gas used in the training is liquid propane stored in a pressure vessel, it enters the gas intake pipe 2 after gasification. If there is no premixing, the combustible gas moves along the top, and a blue flame is produced near the top due to lack of oxygen, that is, incomplete combustion. Therefore, a gas supply device 36 is designed to achieve premixing of combustible gas and air. The premixed gas is directly ejected from the small hole 42 of the U-shaped pipe outlet hole, and can burn instantly under the action of the fire source. The gas supply device 36 is composed of a gas-air mixer 361 and a combustion-supporting fan 362. The gas intake pipe 2 is connected to the gas inlet of the gas-air mixer 361, the combustion-supporting fan 362 is connected to the air inlet of the gas-air mixer 361, and the gas delivery pipe is connected to the mixed gas outlet 42 of the gas-air mixer 361.

[0037] The transmission mechanism 6 is driven by a motor and is used to change the angle of the baffle 43 during the flame spreading process. Due to the cooling of the cooling system 9, the temperature in the luggage compartment 7 is relatively low. The motor is installed in the luggage compartment 7 to protect the motor. The motor is linked with the two-way low-speed detector 5, and the two-way low-speed detector 5 sends a driving control signal. The transmission mechanism 6 is an existing common transmission mechanism 6, which can be composed of a motor, a transmission shaft, gears and chains. The motor is connected to the transmission shaft, and a gear is installed on the transmission shaft. The baffle 43 is tightly connected to the transmission shaft, and a gear of the same size as that on the motor transmission shaft is installed on the transmission shaft. The two gears are connected by a chain to change the rotation angle of the baffle 43. The principle diagram is as follows: Figure 6 The baffles 43 are also connected with each other by a transmission shaft, a gear and a chain, so that they can rotate synchronously under the drive of the motor.

[0038] The gas intake pipe 2 is provided with an intake valve at the air inlet outside the model, which can independently control the flow of the combustible gas. The two-way low-speed detector 5 is located at the rear end of the inner arch 13 and is 3.5m away from the nearest baffle 43. The double-layer arch area set by the device can be fully covered by the flame when the intake valve is fully open. By adjusting the valve opening, the flame length changes significantly. By adjusting the valve opening, the flame zone length is set within the range of 3.5m from the baffle 43, and then the length of the flame zone is controlled by the baffle 43. There is no special requirement for the 3.5m position to be set at a distance from the baffle 43, but the two-way low-speed detector 5 is set at this position to know the range of the flame length. Setting it farther or closer to a certain point requires setting the opening of the regulating valve. The flame length of the top flame spread changes with the change of the pressure difference. The smaller the pressure difference value, the shorter the flame length. The two-way low-speed detector 5 can be used as a signal for adjusting the angle of the baffle 43.

[0039] The ignition source device 44 provides a continuous fire source to ensure that it does not go out during the opening of the gas solenoid valve. The combustion port of the ignition source device 44 is located at the outlet 42 of the curved section of the U-shaped gas pipeline 41, so as to ignite the gas ejected from the outlet 42 of the U-shaped gas pipeline 41. The ignition source device 44 is composed of a curved pipe, an igniter and a combustible gas ignition pipeline with a diameter of 2 cm. One end of the curved pipe is open downward to form a combustion port. The igniter and the combustible gas ignition pipeline are set in the curved pipe as ignition sources. During firefighting training, since the water gun will not impact vertically upward to extinguish the fire, but at an angle, placing the ignition source in the curved pipe plays a protective role, and there will be no situation where the water gun impact directly hits the ignition source. A flame monitor for detecting the flame state of the ignition source device 44 is also provided on the combustion port of the curved pipe, and an electromagnetic switch valve is connected to the combustible gas ignition pipeline.

[0040] The cooling water sandwich structure 12 is provided with a cooling system 9, see Fig. 9 The cooling system is composed of a cooling water pipe 91 and a nozzle 92. There are several nozzles 92. The nozzles 92 are all located in the cooling water sandwich structure 12 and are evenly spaced along the length direction of the arched narrow-body aircraft cabin model 1. The cooling water pipe 91 is installed on the top of the arched narrow-body aircraft cabin model 1 and is connected to the inside of the cooling water sandwich structure 12 through the nozzle 92. The cooling water pipe 91 pressurizes the cooling water and enters the cooling water sandwich of the model from the top outside the model. It is cooled by multiple nozzles 92. The nozzle 92 is located in the cooling water sandwich. The arched top structure is protected from being damaged by the direct impact of the flashover by water spraying, thereby extending the service life of the model. A drain port 15 is provided at the bottom of the arched narrow-body aircraft cabin model 1. The drain port 15 is connected to the inside of the cooling water sandwich structure 12, and the cooling water is discharged by a direct opening.

[0041] A control method for a fire jumping training device on the top of an arched cabin, the method steps are as follows:

[0042] Step 1: Before the fire jumping training device is started, the air intake fan 34 and the smoke exhaust fan 35 are automatically turned on, and the cabin doors 11 on both sides are opened. The air intake fan 34 draws outside air into the middle section of the arched narrow-body aircraft cabin model 1, and the residual combustible gas inside the model is discharged through the smoke exhaust fan 35;

[0043] Step 2, starting the cooling system 9 to cool the area of ​​the arch top directly impacted by the flame;

[0044] Step 3, start the ignition source device 44, ignite the ignition source device 44, and use the flame detector to monitor the ignition status of the ignition source device 44. If the flame detector signal is normal and the ignition is successful, then proceed to the next sparking step, otherwise, re-ignite;

[0045] Step four, after the ignition source device 44 is successfully ignited, start the sparkover device 4, open the solenoid valve on the gas inlet pipe 2, and the combustible gas enters the gas supply device 36, mixes with the air and enters the U-shaped gas pipe of the sparkover device 4, flows out from the air outlet 42 on the U-shaped gas pipe, is ignited by the ignition source device 44, forms a spark on the top of the model, and then the cabin training can be carried out.

[0046] The bidirectional low-speed detector 5 converts the output signal of the flame pressure difference into a motor control signal, and the motor uses the transmission mechanism 6 to synchronously change the angle of the baffle 43. When the pressure difference measured by the bidirectional low-speed detector 5 is 0, the angle of the baffle 43 does not change and is in the initial vertical state; as the pressure difference continues to increase, the baffle 43 begins to rotate. When the pressure difference measured by the bidirectional low-speed detector 5 is 0, the angle of the baffle 43 does not change and is in the initial vertical state. When the two-way low-speed detector 5 measures a pressure difference greater than 0.4 Pa, the baffle 43 rotates 10° in the opposite direction of the flame spread to control the speed of the flame spread.

[0047] The pressure difference is estimated according to the actual situation. According to the training requirements, the fire resistance temperature of ordinary protective clothing for firefighters is 200℃. In order to control the length of the flame zone, the temperature of the flame zone at a distance of 433.5m from the baffle should not be too high. Here, the flame temperature of the flame front zone is set to 200℃. When the flame speed is 1m / s, it can be used The pressure difference is calculated to be 0.4Pa, and the output voltage value is U=5.64V. When the pressure difference is 0, the baffle 43 does not rotate. When the flame spread speed increases, it means that the flame is in the vigorous flame area at the measuring point and the flame length is long. At this time, by rotating the baffle 43 in the opposite direction of the flame spread, the flame spread can be prevented, the speed can be reduced, and the length of the flame area can be adjusted. This indicates that the flame zone has not reached the measuring point. Adjusting the baffle 43 along the flame propagation direction can increase the flame propagation speed and increase the flame zone length. The purpose is to keep the flame zone length stable at around 3.5 m.

[0048] After the spark ignition is successful, if the ignition source is extinguished and the flame detector detects an abnormal signal, the air intake valve of the gas intake pipe 2 is automatically closed to ensure that the gas intake valve can be opened only when there is fire in the ignition source. Otherwise, the continued supply of premixed gas will cause a high gas concentration in the cabin, which may cause an explosion. This ensures that the spark training device operates normally. Otherwise, the ignition source device 44 and the air intake valve will not be closed until the training is over.

[0049] The above is a detailed introduction to a fire jumping training device on the top of an arched cabin provided by the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope, and changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A fire jumping training device on the top of an arched cabin, characterized in that: The invention comprises an arched narrow-body aircraft cabin model, wherein the arched narrow-body aircraft cabin model is an inner and outer double-layered arched roof structure, a gap is left between the inner arched roof and the outer arched roof to form a cooling water sandwich structure, a front section of the arched narrow-body aircraft cabin model is provided with an ignition source device, a rear section is provided with double-sided cabin doors, a gas intake pipe and an equipment compartment, a middle section of the arched narrow-body aircraft cabin model is provided with a luggage compartment, a seat and a spark jumping device, the spark jumping device is located between the luggage compartments and is arranged on the top surface of the inner arched roof, and the gas intake pipe is communicated with the inside of the spark jumping device.

2. The fire jumping training device for the arched cabin top according to claim 1, characterized in that: The equipment cabin consists of a cabin body and a cabin door. The cabin body is provided with a ventilation pipe, a gas delivery pipeline and an air supply device. The gas intake pipeline is located in the equipment cabin and is connected with the spark-over device through the air supply device and the gas delivery pipeline. The middle section of the arched narrow-body aircraft cabin model is connected with the outside through a ventilation pipe, and a ventilation hole is opened at the lower part of the cabin door.

3. The fire jumping training device for the arched cabin top according to claim 2, characterized in that: An air intake fan is provided on the ventilation duct, a smoke exhaust fan is provided on the side of the cabin body of the equipment compartment, the upper part of the smoke exhaust fan is located in the luggage compartment, and the lower part is located in the cabin in the middle section of the arched narrow-body aircraft cabin model, a smoke exhaust hole is opened on the side of the luggage compartment, and a smoke exhaust pipe is provided on the top of the cabin body.

4. The fire jumping training device for the arched cabin top according to claim 2, characterized in that: The gas supply device consists of a gas-air mixer and a combustion-supporting fan. The gas inlet pipeline is connected to the gas inlet of the gas-air mixer, the combustion-supporting fan is connected to the air inlet of the gas-air mixer, and the gas delivery pipe is connected to the mixed gas outlet of the gas-air mixer.

5. The fire jumping training device for the arched cabin top according to claim 1, characterized in that: The spark jumping device consists of a U-shaped gas pipeline, a baffle and a bidirectional low-speed detector. The curved section of the U-shaped gas pipeline is located at the front section of the arched narrow-body aircraft cabin model, and the horizontal section is arranged along the channel direction of the middle section of the arched narrow-body aircraft cabin model. The U-shaped gas pipeline is fixed on the top surface of the inner arched top. There are several baffles, which are arranged in sequence at intervals along the channel direction of the middle section of the arched narrow-body aircraft cabin model. The baffles are vertically arranged between the horizontal sections of the U-shaped gas pipeline, and the upper ends of the baffles are rotatably connected to the top surface of the inner arched top. The inner side of the U-shaped gas pipeline is evenly spaced with air outlets, and the air outlets are located between the baffles. The baffles are provided with a transmission mechanism for adjusting the rotation angle thereof. The top surface of the inner arched top is also provided with a bidirectional low-speed detector for detecting the flame pressure difference.

6. The fire jumping training device for the arched cabin top according to claim 5, characterized in that: The transmission mechanism is driven by a motor, which is installed in the luggage compartment and is linked with a bidirectional low-speed detector for control.

7. The fire jumping training device for the arched cabin top according to claim 5, characterized in that: The bidirectional low-speed detector is located at the rear end of the inner arch top and is spaced 3.5 m from the nearest baffle.

8. The fire jumping training device for the arched cabin top according to claim 5, characterized in that: The combustion port of the ignition source device is located at the gas outlet of the curved section of the U-shaped gas pipeline.

9. The fire jumping training device for the arched cabin top according to claim 1, characterized in that: The ignition source device is composed of a bent pipe, an igniter and a combustible gas ignition pipeline. One end of the bent pipe is opened downward to form a combustion port. The igniter and the combustible gas ignition pipeline are arranged in the bent pipe. A flame monitor for detecting the flame state of the ignition source device is also provided on the combustion port of the bent pipe. An electromagnetic switch valve is connected to the combustible gas ignition pipeline.

10. The fire jumping training device for the arched cabin top according to claim 1, characterized in that: A cooling system is provided on the cooling water sandwich structure, and the cooling system consists of a cooling water pipe and a nozzle. There are several nozzles, all of which are located in the cooling water sandwich structure and are evenly spaced along the length direction of the arched narrow-body aircraft cabin model. The cooling water pipe is installed on the top of the arched narrow-body aircraft cabin model and is connected to the interior of the cooling water sandwich structure through the nozzle. A drain outlet is provided at the bottom of the arched narrow-body aircraft cabin model, and the drain outlet is connected to the interior of the cooling water sandwich structure.

Images