CN110124239A - Hangar high-pressure water mist fire-extinguishing potency test method - Google Patents

Abstract

The invention discloses a hangar high-pressure water mist fire extinguishing efficiency test method, comprising the following steps: step 1, injecting aviation kerosene into a test oil pan of an experimental device, and setting a test plate above the test oil pan, and simultaneously Fix the temperature detector on the upper side of the test board, fix the thermal density detector on the lower side of the test board, set the anemometer to test the current wind speed, step 2, ignite aviation kerosene with a fire stick, keep people away from the fire site 10m away, And use the stopwatch to start timing from the moment when the gasoline is ignited, and the paperless recorder starts to record the temperature output by the temperature detector and the heat flux output by the thermal density detector; step 3, when the flame is completely extinguished, the stopwatch stops timing and waits for a period of time. time. The hangar high-pressure water mist fire extinguishing efficiency test method of the present invention can effectively test the temperature of the upper test board when the aviation kerosene is burning through the setting of steps 1 and 2.

Description

Test method for hangar high-pressure water mist fire extinguishing effectiveness

technical field

The invention relates to a fire extinguishing test method, in particular to a hangar high-pressure water mist fire extinguishing efficiency test method.

Background technique

At the beginning of designing various fire extinguishing systems, it is necessary to conduct scene simulation fire extinguishing experiments to judge the fire extinguishing effect of the scene when using the fire extinguishing system, and use this as a basis to determine whether to set up the fire extinguishing system in the corresponding scene, for example In the case of a fire caused by oil burning in the hangar, whether to use a water mist fire extinguishing system is open to question.

The prior art provides an experimental device to test the fire extinguishing effect of the water mist fire extinguishing system on oil burning by setting a burning oil pan and a fine water mist nozzle above the burning oil pan. However, this structure can only The fire extinguishing effect of the fine water mist fire extinguishing system was observed, but the main reason for the collapse of the hangar when the steel structure loses strength in the actual hangar fire is that the top temperature is too high. Whether the temperature at the top of the water mist fire extinguishing system is too high.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a hangar high-pressure water mist fire extinguishing efficiency test method that can effectively simulate and measure the influence of the upper steel structure when the hangar gasoline catches fire.

In order to achieve the above object, the present invention provides the following technical solutions: a hangar high-pressure water mist fire extinguishing efficiency test method, comprising the following steps:

Step 1: inject aviation kerosene into the test oil pan of the experimental device, and set a test plate above the test oil pan, fix the temperature detector on the upper side of the test plate, and fix the thermal density detector on the test plate At the same time, set the camera to start shooting, set the anemometer to test the current wind speed, and continue to the next step when the wind speed is 0;

Step 2: Use a fire rod to ignite aviation kerosene, keep people away from the fire site 0m away, and use a stopwatch to start timing from the moment the gasoline is ignited. The paperless recorder starts to record the temperature output by the temperature detector and the heat flux output by the heat density detector. ;

Step 3: When the flame is completely extinguished, stop the stopwatch, wait for a period of time, then copy the recorded data, turn off the camera and paperless recorder, clean up the residual oil and water in the oil pan, and rinse it to complete the experiment .

As a further improvement of the present invention, the specific steps of injecting aviation kerosene into the test oil pan in the step 1 are as follows:

Step 11, inject tap water into the test oil pan to a depth of cm, and measure the water depth with a ruler;

Step 1 and 2: Add cm-thick aviation kerosene. In the process of adding kerosene, calculate the required oil volume V=S×d according to the size S of the oil pan and the thickness d of the oil layer, and then use a large number of cups to measure and refuel.

As a further improvement of the present invention, the experimental device used in the step 1 includes a test oil pan, a frame, a shower head and a water outlet device, the test oil pan is fixed on the frame, and the shower head is fixed on the frame relative to the test oil. The position above the test oil pan is connected to the water outlet device, and the water received from the water outlet device sprays high-pressure fine water mist to the top of the test oil pan. The frame is equipped with a temperature detector and a thermal density detector relative to the top of the test oil pan. , the temperature detector and the heat density detector respectively detect the temperature and heat density data and output them to the external computer, the frame is fixedly connected with a test board relative to the position above the test oil pan, and the temperature detector is fixed On the upper side of the test board, the thermal density detector is fixed on the lower side of the test board, and the upper side of the test board near the middle is fixedly connected with a nozzle bracket, and the nozzle bracket is provided with a telescopic tube, so The nozzle is fixed on the lower end of the telescopic tube, and moves up and down as the telescopic tube expands and contracts. The test board is provided with a through hole for the nozzle to pass through relative to the position below the nozzle, and the device that can slide in the through hole There is a sealing plate for punching or sealing the through hole, the sealing plate is linked with the nozzle to open the through hole for the nozzle to pass when the nozzle slides up and down through the through hole, and seal the through hole after the nozzle passes .

As a further improvement of the present invention, the sealing plate is provided with two pieces, and both of them are slidingly connected with the hole wall of the through hole. The opposite sides of the two sealing plates are provided with semicircular grooves. The grooves are spliced with each other to form a sealing hole with the same diameter as the telescopic tube, so as to seal against the outer wall of the telescopic tube after the nozzle slides down. The groove wall of the semicircular groove is fixedly connected with an elastic gasket. The telescopic tube includes a fixed tube and a sliding tube. The tube wall of the fixed tube is fixed on the nozzle bracket and is arranged vertically downward. The upper end is connected to the water outlet device through a pipeline. Extending into the fixed pipe, the nozzle is fixed at the lower end of the sliding pipe, and the inner pipe wall at the upper end of the sliding pipe is provided with a blocking edge, when the water from the water outlet device enters the fixed pipe, the water flow collides with the blocking edge Push the sliding tube to slide down through the through hole and bring the nozzle into the bottom of the test plate, and be clamped by the sealing plate, and seal against the gasket. The end of the lower end of the fixed tube and the lower end of the sliding tube There are reset ribs connected between them.

As a further improvement of the present invention, the tube wall of the sliding tube is provided with through holes penetrating both ends of the sliding tube, and the reset ribs are arranged in the through holes.

As a further improvement of the present invention, a linkage ring is coaxially sleeved on the lower side of the spray head, and two connecting rods are hinged on the lower side of the linkage ring, and the ends of the two connecting rods facing away from the spray head are respectively connected with two The sealing plates are hinged so that when the nozzle slides up and down, the two sealing plates are driven to slide close to each other or separate, so as to open or seal the through hole.

As a further improvement of the present invention, the upper end of the spray head is screwed to the lower end of the sliding tube.

The beneficial effect of the present invention is that the preparation for the fire extinguishing efficiency test can be effectively completed through the setting of the first step, and the test can be effectively started through the setting of the second step, and the test can be completed through the setting of the third step. During the test, since the test board, temperature detector and thermal density detector are set up, it is possible to effectively test the temperature of the upper test board during the combustion test, so as to judge whether it can be effective To avoid the loss of strength of the steel structure above the hangar, and to test the wind speed through the anemometer and only test it when the wind speed is 0, which can effectively avoid the interference of the external environment.

Description of drawings

Fig. 1 is the overall structure diagram of the experimental device in the hangar high-pressure water mist fire extinguishing efficiency test method of the present invention;

Fig. 2 is an enlarged view of part A in Fig. 1 .

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments given in the accompanying drawings.

Referring to Figures 1 to 2, a hangar high-pressure water mist fire extinguishing efficiency test method of the present embodiment includes the following steps:

Step 1, inject aviation kerosene into the test oil pan 1 of the experimental device, and set the test plate 7 above the test oil pan 1, and fix the temperature detector 5 on the upper side of the test plate 7 at the same time, and detect the thermal density. The instrument 6 is fixed on the lower side of the test board 7, and the camera is set to start shooting at the same time, the anemometer is set to test the current wind speed, and the next step is continued when the wind speed is selected as 0;

Step 2: Use a fire stick to ignite aviation kerosene, keep people away from the fire site 10m away, and use a stopwatch to start timing from the moment when the gasoline is ignited. heat flux;

Step 3: When the flame is completely extinguished, stop the stopwatch, wait for a period of time, then copy the recorded data, turn off the camera and paperless recorder, clean up the residual oil and water in the oil pan, and rinse it to complete the experiment , in the process of the test, in order to simulate the existing hangar situation, the site used in the test is generally a closed and large site, and then the overall device is set in the site, and then through steps 1 to 3. The test is effectively completed, and during the test, the test board 7 is fixed on the ceiling of the venue to simulate the existing hangar roof, and the paperless recorder can be realized by using an existing computer, so that it can be effectively The test tested whether the steel structure of the hangar roof would lose strength when high-pressure water mist was used to extinguish the fire.

As an improved specific implementation, the specific steps of injecting aviation kerosene into the test oil pan 1 in the step 1 are as follows:

Step 11, inject tap water into the test oil pan 1 to a depth of 5 cm, and measure the water depth with a ruler;

Step 1 and 2, add aviation kerosene with a thickness of 1cm. During the process of adding kerosene, calculate the required oil volume V=S×d according to the size of the oil pan and the thickness of the oil layer d, then use a large number of cups to measure the oil, and use water The principle of oil incompatibility can form a combustion bed in the test oil pan, so as to avoid the problem of damage to the test oil pan 1 caused by the high oil combustion temperature, and the method of using a ruler and a large number of cups can effectively Reduce the overall measurement error and increase the accuracy of the test.

As an improved specific embodiment, the experimental device used in the step 1 includes a test oil pan 1, a frame 2, a shower head 3 and a water outlet device 4, the test oil pan 1 is fixed on the frame 2, and the shower head 2 is fixed on the position of the frame 2 relative to the test oil pan 1, and is connected with the water outlet device 4, and the water receiving the water outlet device 4 sprays high-pressure fine water mist to the top of the test oil pan 1, and the frame 2 is relatively The top of the test oil pan 1 is provided with a temperature detector 5 and a thermal density detector 6, and the temperature detector 5 and the thermal density detector 6 detect temperature and thermal density data respectively and output them to an external computer. The rack 2 A test plate 7 is fixedly connected to the position above the test oil pan 1, the temperature detector 5 is fixed on the upper side of the test plate 7, and the thermal density detector 6 is fixed on the lower side of the test plate 7, The test board 7 is fixedly connected with a nozzle bracket 71 near the upper side of the middle thereof, and the nozzle bracket 71 is provided with a telescopic tube 72, and the nozzle 3 is fixed on the lower end of the telescopic tube 72. While moving up and down, the test plate 7 is provided with a through hole 73 for the nozzle 3 to pass through relative to the position below the nozzle 3, and the through hole 73 is slidably provided with a hole 73 for punching or sealing. A sealing plate 74, the sealing plate 74 is linked with the nozzle 3 to open the through hole 73 for the nozzle 3 to pass through when the nozzle 3 slides up and down through the through hole 73, and seal the through hole 73 after the nozzle 3 passes through, Through the setting of the above structure, the use of the frame 2 can realize the independence of the overall device and facilitate the transfer of the device, and through the setting of the sealing plate 74, the air-burning test can be carried out first, and the heat and smoke generated when the fuel is burned in the hangar can be measured At the beginning of the test, the hangar kerosene of the test oil pan 1 was ignited by a laser device or other ignition devices, and then the temperature on the current test board 7 was detected by the temperature sensor 5 and the thermal density detector 6, and the temperature below the test board 7 The heat flux density is then output to an external computer for recording, and then the water outlet device 4 is started, and the water flow is input into the nozzle 3, and the nozzle 3 slides downward to open the sealing plate 74 and pass through the through hole 73, and then spray the corresponding fine water mist On the top of the test oil pan 1, the temperature of the current test plate 7 and the heat flux density under the test plate 7 are detected by the temperature sensor 5 and the thermal density detector 6, and are output to the external computer at the same time, and the front and rear are input by the external computer By comparing the temperature data with the heat flux data, it can be effectively judged according to the comparison results whether the current temperature change above the burning kerosene after the fire is extinguished by fine water mist is in a state that will not affect the steel structure. When burning, through the retraction of the telescopic tube 72, the nozzle 3 slides upward through the through hole 73 and enters the top of the test plate 7, and is effectively isolated from the combustion flame on the test oil pan 1 below, so It can effectively avoid the damage of the nozzle 3 caused by the kerosene burning to keep heating the nozzle 3 during the empty burning test, and in the process of the fine water mist test, only need to start the water outlet device 4, the water outlet device 4 The water inside enters into the stretch Inside the retractable tube 72, the telescopic tube 72 stretches and slides down with the nozzle 3 to open the sealing plate 74, pass through the through hole 73 and enter the bottom of the test plate 7, and then spray fine water mist to perform fire extinguishing operation on the test oil pan 1. In this way, the fire extinguishing test for the kerosene burning in the hangar is realized.

As an improved specific embodiment, the sealing plate 74 is provided with two pieces, and both of them are slidingly connected with the hole wall of the through hole 73, and the opposite sides of the two sealing plates 74 are provided with semicircular grooves 75 Two semicircular grooves 75 are spliced together to form a sealing hole with the same diameter as the telescopic tube 72, so as to seal against the outer wall of the telescopic tube 72 after the shower head 3 slides downward, the groove of the semicircular groove 75 The wall is fixedly connected with an elastic gasket 76. The telescopic tube 72 includes a fixed tube 721 and a sliding tube 722. The tube wall of the fixed tube 721 is fixed on the nozzle bracket 71 and is arranged vertically downward. The upper end passes through the pipe Connected with the water outlet device 4, the upper end of the sliding tube 722 coaxially and slidably extends into the fixed tube 721, the nozzle 3 is fixed on the lower end of the sliding tube 722, and the inner tube wall of the upper end of the sliding tube 722 There is a blocking edge 7221 on it. When the water from the water outlet device 4 enters the fixed pipe 721, the water flow collides with the blocking edge 7221 and pushes the sliding pipe 722 to slide down through the through hole 73 and bring the nozzle 3 into the test board 7. and is clamped by the sealing plate 74, and sealed against the gasket 76. A reset rib 723 is connected between the end of the lower end of the fixed pipe 721 and the lower end of the sliding pipe 722, and the water source is output from the water outlet device 4. When injected into the telescopic tube 72, the water flow will collide with the blocking edge 7221 on the sliding tube 722, push the sliding tube 722 to slide downward, and slide the nozzle 3 downward to open the sealing plate 74 and pass through the through hole 73. The reset rib 723 is stretched to accumulate elastic force, and during the empty burning test, the water outlet device 4 will not output water into the telescopic tube 72, and the blocking edge 7221 at the upper end of the sliding tube 722 will not be impacted by the water flow, so that it slides The pipe 722 will lose the power to slide downward, and the sliding pipe 722 will slide upward under the action of the reset rib 723 to open the sealing plate 74 and the sealing gasket 76, so that the nozzle 3 slides upward and enters the top of the test board 7, and the nozzle 3 is closed. In order to avoid the problem of nozzle 3 being burnt out during the empty burning test, and through the setting of the gasket 76, it can be effectively realized that when the nozzle 3 slides down and enters the bottom of the test board 7, the 76 and the outer tube wall of the sliding tube 722 to achieve sealing, avoiding the problem of damage to the upper temperature detector 5 caused by the lower heat wave passing through the test plate 7, the temperature detector 5 used in the prior art is a thermoelectric Even, the heat density detector 6 is an existing heat density detection device, generally provided with a plurality of heat fluxes under the test board 7 when the kerosene is burned in a better detection hangar, wherein the gasket 76 in the present embodiment It is made of high temperature resistant elastic material, such as high temperature resistant rubber.

As an improved specific embodiment, the tube wall of the sliding tube 722 is provided with through holes penetrating both ends of the sliding tube 722, and the reset ribs 723 are arranged in the through holes. Through the setting of the through holes, it can effectively realize A channel is provided for the reset ribs 723 to pass through, so that when the sliding tube 722 slides up and down, it is not easy to get stuck due to the existence of the reset ribs 723 .

As an improved specific embodiment, a linkage ring is coaxially sleeved on the lower side of the spray head 3, and two connecting rods 31 are hinged on the lower side of the linkage ring, and the two connecting rods 31 face away from the spray head 3 One end of each is hinged with two sealing plates 74, so that when the nozzle 3 slides up and down, the two sealing plates 74 are driven to slide close to or separate from each other, so as to open or seal the through hole 73, and through the setting of the connecting rod 31, It can effectively realize that the two sealing plates 74 are driven to slide relative to each other or opposite to each other during the process of the nozzle 3 sliding up and down. In the example, two strip-shaped sliding holes for the connecting rod 31 to pass are provided on the upper side of the test board 7, wherein when the nozzle 3 slides down completely to the bottom of the test board 7, the two sealing plates 74 are driven Close to and merge with each other, at this time, because the gasket 76 is elastic, the gasket 76 will deform and fit closely with the connecting rod 31 to ensure sealing. In this embodiment, the gasket 76 can be opened for the connecting rod 31 to wear. so that when the connecting rod 31 penetrates into the sealing gasket 76, the sealing gasket 76 can be filled between the connecting rod 31 and the sliding tube 722 to maintain the corresponding sealing effect, wherein the linkage ring here and the sleeve of the nozzle 3 The way of connection can be card connection or screw connection.

As an improved embodiment, the upper end of the spray head 3 and the lower end of the sliding tube 722 are screwed together, and the above structure can effectively disassemble the spray head 3 from the sliding tube 722 by cooperating with the linkage ring. , to realize the replacement of the nozzle 3.

In summary, the test method of this embodiment can effectively complete the test through the settings of step 1, step 2 and step 3. At the same time, through the test board 7 and the temperature detector 5 and thermal density monitor 6 during the test Setting, it can realize the test to detect whether the use of fine water mist fire extinguishing system can prevent the loss of strength of the top steel structure when aviation kerosene is burned.

The above descriptions are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (7)

1. A hangar high-pressure water mist fire extinguishing efficiency test method is characterized in that: comprise the steps: Step 1, inject aviation kerosene into the test oil pan (1) of the experimental device, and set the test plate (7) above the test oil pan (1), and fix the temperature detector (5) on the test plate (7) ), fix the thermal density detector (6) on the lower side of the test board (7), set the camera to start shooting at the same time, set the anemometer to test the current wind speed, and continue to the next step when the wind speed is 0; Step 2: Use a fire stick to ignite aviation kerosene, keep people away from the fire site 10m away, and use a stopwatch to start timing from the moment the gasoline is ignited. The paperless recorder starts to record the temperature output by the temperature detector (5), and the thermal density detector ( 6) The output heat flux; Step 3: When the flame is completely extinguished, stop the stopwatch, wait for a period of time, then copy the recorded data, turn off the camera and paperless recorder, clean up the residual oil and water in the oil pan, and rinse it to complete the experiment . 2. The hangar high-pressure water mist fire extinguishing efficiency test method according to claim 1, characterized in that: the specific steps of injecting aviation kerosene into the test oil pan (1) in the first step are as follows: Step 1: Inject tap water into the test oil pan (1) to a depth of 5cm, and use a ruler to measure the water depth; Step 1 and 2, add 1cm thick aviation kerosene. In the process of adding kerosene, calculate the required oil volume V=S×d according to the size S of the oil pan and the thickness d of the oil layer, and then use a large number of cups to measure and refuel. 3. The hangar high-pressure water mist fire extinguishing efficiency test method according to claim 2, characterized in that: the experimental device used in the first step includes a test oil pan (1), a frame (2) and a nozzle (3 ) and the water outlet device (4), the test oil pan (1) is fixed on the frame (2), and the spray head (2) is fixed on the position above the frame (2) relative to the test oil pan (1), And connected with the water outlet device (4), receiving the water from the water outlet device (4) and spraying high-pressure fine water mist to the top of the test oil pan (1), the frame (2) is set relative to the top of the test oil pan (1). There is a temperature detector (5) and a thermal density detector (6). The temperature detector (5) and the thermal density detector (6) respectively detect the temperature and thermal density data and output them to an external computer. The rack (2) A test board (7) is fixedly connected to the position above the test oil pan (1), the temperature detector (5) is fixed on the upper side of the test board (7), and the thermal density detector (6) Fixed on the lower side of the test board (7), the upper side of the test board (7) near the middle is fixedly connected with a nozzle bracket (71), and the nozzle bracket (71) is provided with a telescopic tube ( 72), the nozzle (3) is fixed on the lower end of the telescopic tube (72), and moves up and down with the expansion and contraction of the telescopic tube (72), and the test plate (7) is opened relative to the position below the nozzle (3) There is a through hole (73) for the nozzle (3) to pass through, and a sealing plate (74) for punching or sealing the through hole (73) is slidably provided in the through hole (73). The sealing plate (74) is linked with the nozzle (3) to open the through hole (73) for the nozzle (3) to pass through when the nozzle (3) slides up and down through the through hole (73), and after the nozzle (3) passes through Seal through hole (73). 4. The hangar high-pressure water mist fire extinguishing efficiency test method according to claim 3, characterized in that: the sealing plate (74) is provided with two pieces, and both of them are slidingly connected with the hole wall of the through hole (73) , the opposite sides of the two sealing plates (74) are provided with semicircular grooves (75), and the two semicircular grooves (75) are spliced together to form a sealing hole with the same diameter as the telescopic tube (72), so that the After the nozzle (3) slides down, it is sealed against the outer tube wall of the telescopic tube (72), and an elastic gasket (76) is fixedly connected to the groove wall of the semicircular groove (75), and the telescopic tube (72) includes a fixed pipe (721) and a sliding pipe (722). The pipe wall of the fixed pipe (721) is fixed on the nozzle bracket (71) and is set vertically downward. The upper end passes through the pipe and the water outlet device (4 ) connection, the upper end of the sliding tube (722) coaxially and slidably extends into the fixed tube (721), the nozzle (3) is fixed at the lower end of the sliding tube (722), and the sliding tube (722 ) is provided with a blocking edge (7221) on the inner pipe wall at the upper end, when the water from the outlet device (4) enters the fixed pipe (721), the water flow collides with the blocking edge (7221) and pushes the sliding pipe (722) Slide down through the through hole (73) and bring the nozzle (3) into the bottom of the test plate (7), and be clamped by the sealing plate (74), and seal against the gasket (76). The fixed tube ( A reset rib (723) is connected between the lower end of the sliding tube (722) and the lower end of the sliding tube (722). 5. The hangar high-pressure water mist fire extinguishing efficiency test method according to claim 4, characterized in that: the tube wall of the sliding tube (722) is provided with through holes penetrating both ends of the sliding tube (722), and the reset Ribs (723) are provided in the through holes. 6. The hangar high-pressure water mist fire extinguishing efficiency test method according to claim 5, characterized in that: the lower side of the nozzle (3) is coaxially sleeved with a linkage ring, and the lower side of the linkage ring is hinged with a Two connecting rods (31), the ends of the two connecting rods (31) facing away from the nozzle (3) are respectively hinged with the two sealing plates (74), so as to drive the two sealing plates when the nozzle (3) slides up and down The plates (74) are slid towards or apart from each other to open or seal the through holes (73). 7. The hangar high-pressure water mist fire extinguishing efficiency test method according to claim 6, characterized in that: the upper end of the nozzle (3) is connected to the lower end of the sliding pipe (722) through threads.