A forest fire reduced scale combustion test system

Abstract

The present application belongs to the technical field of fire scale combustion, and discloses a forest fire scale combustion test system. The forest fire scale combustion test system comprises a main test device, a forest combustible sample is supported on the main test device, a lighting device for igniting the forest combustible sample is arranged, a cover body is arranged outside the main test device, a smoke exhaust port is arranged on the periphery of the cover body, the cover cavity inside the cover body is a negative pressure chamber, the smoke generated by the combustion of the forest combustible sample on the main test device is discharged from the cover cavity through the smoke exhaust port, an environment control device is arranged for controlling the wind speed condition in the cover cavity, a data collection and display device is arranged for collecting and recording the temperature and humidity change condition in the cover cavity, and displaying the flame synchronous simulation image and / or the data information of the smoke discharged through the smoke exhaust port. According to the present application, the wind speed in the cover cavity is controlled by the environment control device, the combustion of the forest combustible sample and the fire spreading rule under different wind conditions in the forest are simulated, and data support is provided for fire prevention and control.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fire scale combustion, and particularly relates to a forest fire scale combustion test system. BACKGROUND

[0002] Forest fire is a sudden and destructive natural disaster, which is difficult to handle and rescue. Forest fire has the characteristics of complex and variable behavior and large damage area. The fire area of a forest fire is often several hundred square meters, several thousand square meters or even more than ten thousand square meters. Therefore, it is necessary to study the simulation of forest fire under controllable conditions, test and obtain the combustion data.

[0003] However, the state and position of forest combustibles are various and not as simple as the experimental environment. Therefore, the simulation device of forest fire in the prior art cannot truly reflect the real situation of forest fire combustion.

[0004] Therefore, it is necessary to provide a relatively large forest fire scale combustion test system capable of providing various forest combustible storage states and positions to solve the above problems.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the deficiency that the prior art cannot effectively control and modify the storage state and position of forest combustibles. The purpose is to provide a forest fire scale combustion test system capable of providing various forest combustible states and positions.

[0007] To solve the above technical problems, the basic idea of the technical solution of the present application is as follows: a forest fire scale combustion test system, comprising:

[0008] A main test device, which supports a forest combustible sample; the main test device is provided with an ignition device for igniting the forest combustible sample;

[0009] A cover body, which is arranged outside the main test device; the cover body is provided with a smoke exhaust port on the periphery, the cover cavity inside the cover body is a negative pressure chamber, and the smoke generated by the combustion of the forest combustible sample on the main test device is discharged from the cover cavity through the smoke exhaust port;

[0010] An environment control device, which is used to control the wind speed condition in the cover cavity;

[0011] A data collection and display device, which is used to collect and record the temperature and humidity changes in the cover cavity, and display the synchronous simulation image of the flame and / or the data information of the smoke discharged through the smoke exhaust port.

[0012] Compared with the prior art, the present application has the following beneficial effects: in the present application, the ignition device arranged on the main measuring device is arranged to realize remote control of ignition, and the control safety is higher; the main measuring device is covered by the cover body, which prevents flying sparks, flying ash and the like generated by combustion from causing accidental fires, and provides a safe operating environment for experimenters; the environmental control device can accurately control the wind speed in the cover cavity, simulate different wind conditions in the forest, and thus in-depth explore the development law of fire, and provide data support for fire prevention and control; the cover body is a negative pressure chamber, which can simulate the combustion scene under the natural ventilation condition of forest fires, and is helpful to restore the real situation; the data collection and display device can collect the temperature and humidity change conditions in the cover cavity, and can analyze the influence mechanism of the temperature and humidity on the combustion of the combustible material; the data information of the flame synchronous simulation image and the smoke exhaust port can be displayed, which helps researchers to observe the development process of the fire, and has a positive significance for evaluating the influence of the fire environment and smoke control during fire fighting, and provides a basis for formulating prevention and control strategies.

[0013] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are part of the present application, serve to provide a further understanding of the present application, and the schematic embodiments of the present application and their descriptions serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the accompanying drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0015] Figure 1 FIG. 1 is a schematic structural diagram of the main measuring device in the embodiment of the present application;

[0016] Figure 2 FIG. 3 is a structural diagram of the connecting and rotating assembly in the embodiment of the present application in a perspective view; Figure 1

[0017] Figure 3 FIG. 5 is a structural diagram of the main measuring device in the embodiment of the present application in a top view;

[0018] Figure 4 FIG. 7 is a structural diagram of the main measuring device in the embodiment of the present application in a front view;

[0019] Figure 5 FIG. 9 is a structural diagram of the connecting and rotating assembly in the embodiment of the present application in a perspective view; Figure 4

[0020] Figure 6 FIG. 11 is a structural diagram of the main measuring device in the embodiment of the present application in a side view;

[0021] ​​Figure 7 is connected and rotated in Figure 6 the structure diagram of the connecting and rotating assembly in another perspective view of the embodiment of the present application;

[0022] Figure 8 is the structure diagram of the main measuring device in another perspective view of the embodiment of the present application;

[0023] Figure 9 is connected and rotated in Figure 8 the structure diagram of the connecting and rotating assembly in another perspective view of the embodiment of the present application;

[0024] Figure 10 is the structure diagram of the connecting and rotating assembly in another perspective view of the embodiment of the present application;

[0025] Figure 11 is the display diagram of the fire area calculation in the embodiment of the present application.

[0026] Main element description in the figure:

[0027] 1, main measuring device; 11, main measuring plate; 2, support column; 21, base plate; 22, through hole; 3, connecting and rotating assembly; 31, connecting plate; 311, first arc-shaped guide groove; 312, second arc-shaped guide groove; 313, first stop pin hole; 314, second stop pin hole; 32, rotating outer pivot; 321, third arc-shaped guide groove; 322, fourth arc-shaped guide groove; 323, third stop pin hole; 324, first outer pivot plate; 325, second outer pivot plate; 326, first connecting part; 327, second connecting part; 33, rotating inner pivot; 331, fourth stop pin hole; 332, first inner pivot plate; 333, second inner pivot plate; 334, third connecting part; 335, fourth connecting part; 4, support strip.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0030] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As shown in Figures 1 to 11 A forest fire scale combustion test system according to the present application comprises:

[0033] A main test device 1, which supports a forest combustible sample; the main test device 1 is provided with an ignition device for igniting the forest combustible sample;

[0034] A cover body, which covers the outside of the main test device 1; the cover body is provided with an exhaust port on the periphery, and the cover cavity inside the cover body is a negative pressure chamber; the smoke generated by the combustion of the forest combustible sample on the main test device 1 is discharged from the cover cavity through the exhaust port;

[0035] An environment control device, which is used to control the wind speed condition in the cover cavity;

[0036] A data collection and display device, which is used to collect and record the temperature and humidity changes in the cover cavity, and display the flame synchronous simulation image and / or the data information of the smoke discharged from the exhaust port.

[0037] In the present application, by providing the ignition device on the main test device, remote control ignition is realized, and the safety is higher; by providing the cover body covering the main test device, the accidental fire caused by the spatter of sparks, fly ash and the like generated by combustion is prevented, and a safe operating environment is provided for the experimenters; by the environment control device, the wind speed in the cover cavity can be accurately controlled, different wind conditions in the forest can be simulated, and the development law of the fire can be deeply explored, thereby providing data support for fire prevention and control; the cover cavity is a negative pressure chamber, which can simulate the combustion scene under the natural ventilation condition of the forest fire, and is helpful to restore the real situation; the data collection and display device can collect the temperature and humidity changes in the cover cavity, real-time monitoring can be realized, the influence mechanism of the temperature and humidity changes on the combustion of the combustible material can be analyzed; the flame synchronous simulation image and the data information of the smoke discharged from the exhaust port can be displayed, which is of great significance for researchers to observe the development process of the fire, evaluate the influence of the fire environment and control the smoke during the fire fighting, and provide basis for formulating the prevention and control strategy.

[0038] Please refer to the accompanying Figure 1 , the accompanying Figure 3 , the accompanying Figure 4, attached Figure 6 and attached Figure 8 In a specific embodiment of the present embodiment, the main test device 1 comprises: a main test plate 11, which is a rectangular plate-shaped structural member;

[0039] The main test plate 11 is provided with four main test plates 11 arranged in a rectangular array, and any two adjacent main test plates 11 among the four main test plates 11 can rotate relative to each other;

[0040] The ignition device is arranged on the supporting surface of the main test plate 11; the ignition device is arranged at the center position of the supporting surface of the main test plate 11.

[0041] The present application can flexibly adjust the relative angle of the main test plate according to different test requirements, simulate different forest ground layouts and slopes, enable the experiment to cover a wider range of terrain conditions, enhance the simulation capability of the system for different forest geographical environments, and improve the universality and applicability of the test results. It has important significance for studying the influence of different terrain and vegetation coverage on forest fires; the ignition device is arranged at the arrangement position of the main test plate, and this central arrangement method helps to ensure the accuracy and consistency of the ignition position. In each experiment, the ignition source is positioned at the center position, which can ensure that the combustion is started from a relatively stable and unified position, avoid the influence of the deviation of the ignition position on the experimental results, ensure the repeatability and comparability of the experiment, and at the same time, the ignition position is arranged at the center, which can make the flame spread uniformly in all directions, which is conducive to more accurately observing and recording the combustion of forest combustibles in different directions, so as to better study the propagation characteristics of the flame and provide more reliable data for analyzing the spreading rule of forest fires.

[0042] In a specific embodiment of the present embodiment, the main test plate 11 is a cubic plate-shaped structural member with a length of 10 meters and a width of 10 meters.

[0043] In a specific embodiment of the present embodiment, an asbestos layer is arranged on the supporting surface (the side of the main test plate away from the base surface in the flat state) of the main test plate 11, which plays a role in adhering forest combustible samples of different types and different humidity to avoid sliding on the inclined main test plate 11.

[0044] The main test plate 11 is made of flexible fireproof material, which facilitates the arrangement of different shapes of terrain;

[0045] The outer periphery of the main test plate 11 is provided with a flange made of fireproof material to prevent surrounding objects from being ignited due to the heat radiation of the forest combustible sample ignited by the ignition device on the main test plate 11.

[0046] Please refer to attached Figure 1 , attachedFigure 4 , attached Figure 6 and attached Figure 8 In one specific implementation of the embodiment, the main testing device 1 further comprises a support column 2, which is a length-adjustable columnar support structure.

[0047] The support column 2 is provided with a base plate 21 on the side facing the base surface; along the axial direction of the support column 2, the base plate 21 is provided with a plurality of through holes 22 that are arranged along the circumference of the base plate 21 and are penetrated by the through holes 22.

[0048] The support column 2 is fixed to the base surface by penetrating the through holes 22 with bolts.

[0049] In the present application, the support column can be used to adjust the experimental height of the main testing device, and the height adjustment facilitates the normal rotation adjustment of the main testing plate and has a certain control effect on the air flow path in the adjustment cover cavity, which is of great significance for realizing multi-parameter and multi-condition experiments.

[0050] The support column 2 is a conventional structure in the art, and the present application does not involve optimization and improvement of its structure, and therefore no further description is given herein.

[0051] In one specific implementation of the embodiment, the base surface is the ground.

[0052] It can be understood that the base surface can also be the end surface of other structures (top), such as the top end surface of a poured cement base.

[0053] Please refer to attached Figure 1 , attached Figure 2 and attached Figure 4 to attached Figure 10 In one specific implementation of the embodiment, the main testing device 1 further comprises a connecting and rotating assembly 3, one end of which is connected to the end of the support column 2 away from the base surface, and the other end of the connecting and rotating assembly 3 is connected to a plurality of main testing plates 11.

[0054] The connecting and rotating assembly 3 comprises:

[0055] The connecting plate 31 comprises a first connecting plate which is a plate member with a fan-shaped body and a second connecting plate which is a square plate body, one end of the second connecting plate is connected to one end of the support 2 away from the base surface, an arc-shaped avoiding slot is arranged on the other end of the second connecting plate, and the arc-shaped edge of the first connecting plate is connected to the slot wall of the avoiding slot of the second connecting plate; the first connecting plate and the second connecting plate are integrally arranged; the first connecting plate is provided with a first arc-shaped guide slot 311 and a second arc-shaped guide slot 312 which are both along the circumferential direction of the first connecting plate, the distance between the first arc-shaped guide slot 311 and the center of the first connecting plate is greater than the distance between the second arc-shaped guide slot 312 and the center of the first connecting plate;

[0056] The rotating outer pivot 32 is a circular ring-shaped plate structure, the axis of the rotating outer pivot 32 is perpendicular to the axis of the first connecting plate of the connecting plate 31, and the first extending protrusion arranged on one side of the rotating outer pivot 32 close to the connecting plate 31 extends into the first arc-shaped guide slot 311;

[0057] The rotating inner pivot 33 is a disc-shaped plate structure, the outer diameter of the rotating inner pivot 33 is smaller than the inner diameter of the rotating outer pivot 32, the axis of the rotating inner pivot 33 coincides with the axis of the rotating outer pivot 32, and the axis of the rotating inner pivot 33 is perpendicular to the axis of the first connecting plate of the connecting plate 31, and the second extending protrusion arranged on one side of the rotating inner pivot 33 close to the connecting plate 31 extends into the second arc-shaped guide slot 312.

[0058] In the present application, by arranging the connecting and rotating assembly 3, the rotating outer pivot and the rotating inner pivot can rotate relative to the connecting plate connected with the support, so that multi-angle adjustment is realized.

[0059] Please refer to the accompanying drawings Figure 2 , the accompanying drawings Figure 5 , the accompanying drawings Figure 7 , the accompanying drawings Figure 9 and the accompanying drawings Figure 10 In a specific embodiment of the present application, one end of the second connecting plate is connected to one end of the support 2 away from the base surface, an arc-shaped avoiding slot is arranged on the other end of the second connecting plate, and the arc-shaped edge of the first connecting plate is connected to the slot wall of the avoiding slot of the second connecting plate; the first connecting plate and the second connecting plate are integrally arranged.

[0060] The first connecting plate comprises a circular plate and an arc-shaped plate with the same center, the circular plate is arranged on one side of the arc-shaped plate away from the second connecting plate, and the circular plate and the arc-shaped plate are integrally arranged to form the first connecting plate.

[0061] Please refer to the accompanying drawingsFigure 2 , attached Figure 7 and attached Figure 10 In a specific embodiment of the present embodiment, the first connecting plate is provided with a first stop pin hole 313 and a second stop pin hole 314.

[0062] The first stop pin hole 313 is provided with a plurality of arc lines, and the centers of the arc lines correspond to the centers of the first arc-shaped guide groove 311. The distance between the centers of the arc lines of the plurality of first stop pin holes 313 and the center of the first connecting plate is greater than the distance between the second arc-shaped guide groove 312 and the center of the first connecting plate, and less than the distance between the first arc-shaped guide groove 311 and the center of the first connecting plate. The rod diameter of the first plug pin corresponds to the hole diameter of the first stop pin hole, and the first plug pin is inserted into the first stop pin hole 313 to prevent the rotating outer pivot 32 from moving along the first arc-shaped guide groove 311.

[0063] The second stop pin hole 314 is provided with a plurality of arc lines, and the centers of the arc lines correspond to the centers of the first stop pin hole 313. The distance between the centers of the arc lines of the plurality of second stop pin holes 314 and the center of the first connecting plate is less than the distance between the second arc-shaped guide groove 312 and the center of the first connecting plate. The rod diameter of the second plug pin corresponds to the hole diameter of the second stop pin hole, and the second plug pin is inserted into the second stop pin hole 314 to prevent the rotating inner pivot 33 from moving along the second arc-shaped guide groove 312.

[0064] In the present application, by providing the first stop pin hole and the second stop pin hole, the moving position of the rotating outer pivot and the rotating inner pivot is effectively locked, which effectively supports and effectively avoids the problem of abnormal sliding.

[0065] In a specific embodiment of the present embodiment, the corresponding center angle of the first connecting plate is 122° to 200°.

[0066] The corresponding center angle of the first arc-shaped guide groove 311 and / or the second arc-shaped guide groove 312 is 120°.

[0067] In another specific embodiment of the present embodiment, the corresponding center angle of the arc-shaped plate of the first connecting plate is 180°.

[0068] The corresponding center angle of the first arc-shaped guide groove 311 and / or the second arc-shaped guide groove 312 is 120°.

[0069] Please refer to attached Figure 2 , attached Figure 5 and attached Figure 9In a specific embodiment of the present embodiment, the rotating outer pivot 32 is provided with a third arc-shaped guide groove 321 and a fourth arc-shaped guide groove 322 which are both arranged along the circumferential direction of the third arc-shaped guide groove 321 and the fourth arc-shaped guide groove 322.

[0070] The rotating inner pivot 33 is provided with a fifth arc-shaped guide groove and a sixth arc-shaped guide groove which are both arranged along the circumferential direction of the rotating outer pivot 32, and the distance between the fifth arc-shaped guide groove and the center of the rotating outer pivot 32 is greater than the distance between the sixth arc-shaped guide groove and the center of the rotating outer pivot 32.

[0071] The main measuring device 1 further comprises a support strip 4 which is arranged on one side of the main measuring plate 11 close to the connecting and rotating assembly 3, one end of the support strip 4 is connected to the main measuring plate 11, and the other end of the support strip 4 is provided with a first protrusion and a second protrusion close to one side of the connecting and rotating assembly 3.

[0072] The first protrusions of the support strips 4 on two adjacent main measuring plates 11 among the four main measuring plates 11 extend into the third arc-shaped guide groove 321 and slide in the third arc-shaped guide groove 321, and the second protrusions extend into the fourth arc-shaped guide groove 322 and slide in the fourth arc-shaped guide groove 322.

[0073] The first protrusions of the support strips 4 on the other two adjacent main measuring plates 11 among the four main measuring plates 11 extend into the fifth arc-shaped guide groove and slide in the fifth arc-shaped guide groove, and the second protrusions extend into the sixth arc-shaped guide groove and slide in the sixth arc-shaped guide groove.

[0074] In the present application, through the above arrangement, under the premise that the rotating outer pivot and the rotating inner pivot can rotate relative to the connecting plate, the main measuring plate can also rotate relative to the rotating outer pivot and the rotating inner pivot, the movement form of the main measuring plate is more diverse, and simulation of different angles can be performed.

[0075] In a specific embodiment of the present embodiment, the central angles of the third arc-shaped guide groove 321, the fourth arc-shaped guide groove 322, the fifth arc-shaped guide groove and the sixth arc-shaped guide groove are 120°.

[0076] Please refer to the accompanying drawings Figure 2 , the accompanying drawings Figure 5 , the accompanying drawings Figure 8 and the accompanying drawings Figure 9In one specific implementation of the embodiment, the rotating outer pivot 32 is further provided with third stop pin holes 323, the third stop pin holes 323 are provided in multiple, the circle centers of the multiple third stop pin holes 323 are coincided with the circle center of the rotating outer pivot 32; the distance between the circle centers of the multiple third stop pin holes 323 and the circle center of the rotating outer pivot 32 is greater than the distance between the fourth arc-shaped guide groove 322 and the circle center of the rotating outer pivot 32, and is less than the distance between the third arc-shaped guide groove 321 and the circle center of the rotating outer pivot 32; the third pin is inserted into the third stop pin hole 323 to prevent the first protrusion from sliding in the third arc-shaped guide groove 321 and to prevent the second protrusion from sliding in the fourth arc-shaped guide groove 322, the rod diameter of the third pin is matched with the hole diameter of the third stop pin hole 323.

[0077] The rotating inner pivot 33 is further provided with fourth stop pin holes 331, the fourth stop pin holes 331 are provided in multiple, the circle centers of the multiple fourth stop pin holes 331 are coincided with the circle center of the rotating inner pivot 33; the distance between the circle centers of the multiple third stop pin holes 323 and the circle center of the rotating inner pivot 33 is greater than the distance between the sixth arc-shaped guide groove and the circle center of the rotating outer pivot 32, and is less than the distance between the fifth arc-shaped guide groove and the circle center of the rotating outer pivot 32; the fourth pin is inserted into the fourth stop pin hole 331 to prevent the first protrusion from sliding in the fifth arc-shaped guide groove and to prevent the second protrusion from sliding in the sixth arc-shaped guide groove, the rod diameter of the fourth pin is matched with the hole diameter of the fourth stop pin hole 331.

[0078] In the present application, by setting the third pin, the third stop pin hole, the fourth pin, and the fourth stop pin hole, the main measurement plate (relative to the rotating outer pivot) and the main measurement plate (relative to the rotating inner pivot) are adjusted to the corresponding position and are limited in position.

[0079] In one specific implementation of the embodiment, the pin (the first pin, the second pin, the third pin, and the fourth pin) is an L-shaped structural member or a T-shaped structural member.

[0080] The pin is inserted into the corresponding stop pin hole (the first stop pin hole, the second stop pin hole, the third stop pin hole, and the fourth stop pin hole); the outer edge (for an L-shaped structural member, it is a single-sided outer edge; for a T-shaped structural member, it is a single-sided or double-sided outer edge) of the pin which is not inserted into the stop pin hole blocks the movement of the corresponding component.

[0081] Please refer to the accompanying drawings Figure 2 , the accompanying drawings Figure 5 , and the accompanying drawings Figure 9In one specific implementation of the embodiment, the rotating outer pivot 32 comprises a first outer pivot plate 324 and a second outer pivot plate 325 arranged as a center of symmetry relative to the connecting plate 31, and the first outer pivot plate 324 and the second outer pivot plate 325 are both provided with the third arc-shaped guide groove 321 and the fourth arc-shaped guide groove 322; the first outer pivot plate 324 and the second outer pivot plate 325 are connected through a first connecting part 326 and a second connecting part 327, the first connecting part 326 is arranged on the side of the first outer pivot plate 324 and the second outer pivot plate 325 close to the connecting plate 31, and the second connecting part 327 is arranged on the side of the first outer pivot plate 324 and the second outer pivot plate 325 away from the connecting plate 31; the first connecting part 326 comprises the first extension protrusion, which is a connecting shaft, and the first extension protrusion is arranged in the first arc-shaped guide groove 311.

[0082] The rotating inner pivot 33 comprises a first inner pivot plate 332 and a second inner pivot plate 333 arranged as a center of symmetry relative to the connecting plate 31, and the first inner pivot plate 332 and the second inner pivot plate 333 are both provided with the fifth arc-shaped guide groove and the sixth arc-shaped guide groove; the first inner pivot plate 332 and the second inner pivot plate 333 are connected through a third connecting part 334 and a fourth connecting part 335, the third connecting part 334 is arranged on the side of the first inner pivot plate 332 and the second inner pivot plate 333 close to the connecting plate 31, and the fourth connecting part 335 is arranged on the side of the first inner pivot plate 332 and the second inner pivot plate 333 away from the connecting plate 31; the third connecting part 334 comprises the second extension protrusion, which is a connecting shaft, and the second extension protrusion is arranged in the second arc-shaped guide groove 312.

[0083] In the present application, the first outer pivot plate and the second outer pivot plate (the first inner pivot plate and the second inner pivot plate) arranged in a double-sided matching manner are arranged, and the assembly can realize component assembly, and is convenient for replacement and adjustment.

[0084] In one specific implementation of the embodiment, the third arc-shaped guide groove 321 on the first outer pivot plate 324 and the second outer pivot plate 325 is not connected, and the fourth arc-shaped guide groove 322 on the first outer pivot plate 324 and the second outer pivot plate 325 is not connected.

[0085] The fifth arc-shaped guide groove on the first inner pivot plate 332 and the second inner pivot plate 333 is not connected, and the sixth arc-shaped guide groove on the first inner pivot plate 332 and the second inner pivot plate 333 is not connected.

[0086] Specifically, in the main testing device of the forest fire reduced-scale combustion testing system provided in the application, the rotating outer pivot and the rotating inner pivot can independently rotate relative to the connecting plate (the rotating inner pivot rotates along the circumference of the connecting plate), the main testing plate connected to the rotating outer pivot can rotate relative to the rotating outer pivot (the main testing plate rotates along the circumference of the rotating outer pivot), and the main testing plate connected to the rotating inner pivot can rotate relative to the rotating inner pivot (the main testing plate rotates along the circumference of the rotating inner pivot).

[0087] In a specific embodiment of the present embodiment, the data collection and display device comprises:

[0088] A camera assembly is arranged to capture the combustion state of the forest fuel sample.

[0089] A thermocouple is arranged on the main testing plate 11 to record the temperature change in the cover cavity; the thermocouple is arranged in multiple, and multiple thermocouples are arranged in a rectangular array on the main testing plate 11, and are arranged along the length direction or the width direction of the main testing plate 11, and the interval between two adjacent thermocouples is 10 cm.

[0090] A weighing assembly is arranged on the side opposite to the supporting surface of the main testing plate 11 (in the flat state, the side close to the base surface).

[0091] A hygrometer is arranged in the cover cavity to record the humidity change in the cover cavity.

[0092] A display assembly is arranged to display the synchronous simulation image of the flame and / or the data information of the flue gas discharged through the smoke outlet.

[0093] In the present application, by arranging the data collection and display device, the parameter change of the forest fuel sample during the combustion process is accurately detected, recorded and displayed, and the combustion process is monitored.

[0094] In a specific embodiment of the present embodiment, a thermal radiation meter is further arranged, and the thermal radiation meter and the thermocouple are both arranged in the main testing plate 11.

[0095] In a specific embodiment of the present embodiment, the environment control device comprises an air outlet fan (blower) arranged two meters away from the main testing plate 11, the air outlet fan has an air outlet with a size of 20 meters long and 0.5 meters wide, and the air outlet fan provides an air speed in a range of 0-20 m / s without change.

[0096] In a specific embodiment of the present embodiment, the air outlet of the air outlet fan and the camera assembly are arranged on opposite sides of the main testing plate.

[0097] In a specific embodiment of the present embodiment, the camera assembly records the entire combustion process of the forest fuel sample and synchronously uploads to the data processing center (which processes the acquired data) and the display assembly for simulation display;

[0098] The digital twin technology is used to realize three-dimensional presentation of forest fire spread. Through real-time testing and acquisition of various parameter indicators, a plurality of data indicators are obtained through calculation based on the simulated display image and information, and image backtracking is supported;

[0099] The plurality of data indicators include fire line length, fire area, spread speed, heat energy change, flame height and shape, smoke production data (smoke production rate, smoke type, smoke concentration), etc.

[0100] The data processing center is used for receiving and / or processing image information captured by the camera assembly, and / or temperature information detected by the thermocouple, and / or weight information detected by the weighing assembly, and / or humidity information detected by the hygrometer, and / or smoke production data detected by the mass spectrometer chromatograph;

[0101] The data processing center sends the received or processed data information to the display assembly.

[0102] For the measurement of the fire line length, because the length of the combustion is irregular, the image is synchronized to the computer, and a line ruler is used for measurement to present the real-time length of the fire line.

[0103] Please refer to the accompanying Figure 11 In a specific embodiment of the present embodiment, for the calculation of the fire area, the area is divided into a grid structure along the length and width directions of the main measuring plate 11, and each unit grid in which the fire occupies more than or equal to half of the unit grid area is marked as 1 (a unit cell that is fully occupied is also marked as 1), and a grid that occupies less than half of the unit grid area is marked as 0 (ignored);

[0104] The collection of unit grids marked as 1 in each main measuring plate 11 is the occupied area S (S1, S2, S3, S4) in the main measuring plate 11;

[0105] The fire area is obtained by V = S1cosθ1+S2cosθ2+S3cosθ3+S4cosθ4;

[0106] Wherein, S1, S2, S3, S4 represent the areas of the four main measuring plates 11 respectively; θ1, θ2, θ3, θ4 are the angles between the main measuring plates 11 and the horizontal plane.

[0107] In one specific embodiment of the present embodiment, the main test plate is divided into a grid structure along the length direction (the main test plate is divided into 8 parts in the X direction) and the width direction (the main test plate is divided into 7 parts in the Y direction) of the main test plate 11, a total of 56 unit cells, (X, (X+1); Y, (Y+1)) represents each corresponding unit cell, 0≤X≤8, 0≤Y≤7, for example Figure 11 The upper left corner cell is represented as (0, 1; 7, 8);

[0108] Among them, for the unit cell that is not full, the grid with fire occupying more than or equal to half of the unit grid area is (0, 1; 2, 3), (0, 1; 3, 4), (0, 1; 4, 5), (1, 2; 5, 6), (2, 3; 0, 1), (2, 3; 5, 6), (3, 4; 0, 1), (3, 4; 6, 7), (4, 5; 0, 1), (4, 5; 6, 7), (5, 6; 0, 1) (7, 8; 2, 3) and (7, 8; 3, 4), and all are recorded as 1;

[0109] The occupied area S is the unit cell that is full or more than half full, and there are 42 of them.

[0110] The basis for determining whether a unit cell is half full or not is to further divide the single unit cell into 8x7 sub-cells; if 28 or more sub-cells are full, it is considered that the unit cell is half full or more.

[0111] For the calculation of the spread speed, the spread speed includes the downwind speed and the upwind speed;

[0112] The downwind speed is equal to the distance of the fire head position divided by the time, i.e. S1 / t;

[0113] The upwind speed is equal to the distance of the fire tail position divided by the time, i.e. S2 / t.

[0114] For the calculation of thermal energy, the thermocouple displays the heat change at different positions.

[0115] For the flame height and flame shape, the camera assembly is used to shoot and record the flame shape, and the flame height is calculated, and the display assembly is used for display;

[0116] For smoke production data, the smoke outlet of the cover body is connected with a meteorological mass spectrum chromatograph analyzer, which analyzes the type and concentration of smoke production, and presents it in real time on the display interface of the display assembly.

[0117] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above-mentioned technical content with equivalent embodiments within the scope of the technical solutions of the present application. The embodiments in the above-mentioned embodiments can be further combined or replaced, as long as they do not deviate from the technical solutions of the present application. Any simple modification, equivalent change and modification made to the above-mentioned embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A forest fire reduced scale combustion test system, characterized by, The system comprises: a main testing device on which a forest fuel sample is supported; a lighting device provided on the main testing device for igniting the forest fuel sample; a cover body provided outside the main testing device; a periphery of the cover body is provided with an exhaust port, an inner cover cavity of the cover body is a negative pressure chamber, and smoke generated by combustion of the forest fuel sample on the main testing device is discharged out of the cover cavity through the exhaust port; an environment regulating device for regulating wind speed conditions in the cover cavity; a data collection and display device for collecting and recording temperature and humidity change conditions in the cover cavity, and displaying a synchronous simulation image of a flame and / or data information of the smoke discharged through the exhaust port; the main testing device comprises: a main testing plate which is a rectangular plate-shaped structural member; four main testing plates are provided, and the four main testing plates are arranged in a rectangular array, and any two adjacent main testing plates among the four main testing plates can rotate relative to each other; the data collection and display device comprises: a camera assembly for shooting a combustion state of the forest fuel sample; a thermocouple provided on the main testing plate; a weighing assembly provided on a side opposite to a supporting surface of the main testing plate; a hygrometer provided in the cover cavity; a display assembly for displaying a synchronous simulation image of a flame and / or data information of the smoke discharged through the exhaust port.

2. The forest fire scale combustion testing system according to claim 1, wherein: the lighting device is provided on the supporting surface of the main testing plate; and the lighting device is provided at a central position of the supporting surface of the main testing plate.

3. A forest fire reduced scale combustion test system according to claim 2, wherein, the main testing device further comprises: a support column which is a columnar structural member capable of being adjusted in length and capable of supporting; a bottom disc is provided on a side of the support column facing a base surface; a plurality of through holes are provided on the bottom disc along a circumferential direction of the bottom disc and penetrating through the bottom disc along an axial direction of the support column; a bolt is provided to penetrate through the through holes to fix the support column on the base surface.

4. A forest fire reduced scale combustion test system according to claim 3, wherein, the main testing device further comprises: a connecting and rotating assembly, one end of the connecting and rotating assembly is connected to an end of the support column away from the base surface, and the other end of the connecting and rotating assembly is connected to a plurality of the main testing plates; the connecting and rotating assembly comprises: a connecting plate, the connecting plate comprises a first connecting plate which is a plate member with a fan-shaped main body and a second connecting plate which is a square plate, one end of the second connecting plate is connected to the end of the support column away from the base surface, an arc-shaped avoiding groove is provided on the other end of the second connecting plate, an arc-shaped side of the first connecting plate is connected to a groove wall of the avoiding groove of the second connecting plate, the first connecting plate and the second connecting plate are integrally provided, first and second arc-shaped guide grooves are provided on the first connecting plate along a circumferential direction of the first connecting plate, a distance between the first arc-shaped guide groove and a center of the first connecting plate is greater than a distance between the second arc-shaped guide groove and the center of the first connecting plate. A rotating outer pivot, which is a circular ring-shaped plate structure; the axis of the rotating outer pivot is perpendicular to the axis of the first connecting plate; the first extending protrusion is arranged on the side of the rotating outer pivot close to the connecting plate, and the first extending protrusion extends into the first arc-shaped guide groove; A rotating inner pivot, which is a circular disc-shaped plate structure; the outer diameter of the rotating inner pivot is smaller than the inner diameter of the rotating outer pivot; the axis of the rotating inner pivot coincides with the axis of the rotating outer pivot, and the axis of the rotating inner pivot is perpendicular to the axis of the first connecting plate; the second extending protrusion is arranged on the side of the rotating inner pivot close to the connecting plate, and the second extending protrusion extends into the second arc-shaped guide groove.

5. A forest fire reduced scale combustion test system according to claim 4, wherein, The first connecting plate is provided with a first stop pin hole and a second stop pin hole; The first stop pin hole is provided with a plurality of first stop pin holes, and the centers of the arcs where the centers of the plurality of first stop pin holes are located coincide with the centers of the first arc-shaped guide grooves; the distance between the centers of the arcs where the centers of the plurality of first stop pin holes are located and the center of the first connecting plate is greater than the distance between the second arc-shaped guide grooves and the center of the first connecting plate, and is smaller than the distance between the first arc-shaped guide grooves and the center of the first connecting plate; the first plug pin is arranged to be inserted into the first stop pin hole to prevent the rotating outer pivot from moving along the first arc-shaped guide groove; The second stop pin hole is provided with a plurality of second stop pin holes, and the centers of the arcs where the centers of the plurality of second stop pin holes are located coincide with the centers of the arcs where the plurality of first stop pin holes are located; the distance between the centers of the arcs where the centers of the plurality of second stop pin holes are located and the center of the first connecting plate is smaller than the distance between the second arc-shaped guide grooves and the center of the first connecting plate; the second plug pin is arranged to be inserted into the second stop pin hole to prevent the rotating inner pivot from moving along the second arc-shaped guide groove.

6. A forest fire reduced scale combustion test system according to claim 4, wherein, The rotating outer pivot is provided with a third arc-shaped guide groove and a fourth arc-shaped guide groove which are arranged along the circumferential direction of the rotating outer pivot; the distance between the third arc-shaped guide groove and the center of the rotating outer pivot is greater than the distance between the fourth arc-shaped guide groove and the center of the rotating outer pivot; The rotating inner pivot is provided with a fifth arc-shaped guide groove and a sixth arc-shaped guide groove which are arranged along the circumferential direction of the rotating inner pivot; the distance between the fifth arc-shaped guide groove and the center of the rotating outer pivot is greater than the distance between the sixth arc-shaped guide groove and the center of the rotating outer pivot; The main measuring device further comprises a support strip, which is arranged on the side of the main measuring plate close to the connecting and rotating assembly; one end of the support strip is connected to the main measuring plate, and the other end of the support strip is provided with a first protrusion and a second protrusion close to the side of the connecting and rotating assembly; The first protrusions of the support strips on two adjacent main measuring plates among the four main measuring plates extend into the third arc-shaped guide groove and slide in the third arc-shaped guide groove, and the second protrusions extend into the fourth arc-shaped guide groove and slide in the fourth arc-shaped guide groove; The first protrusions of the support strips on two adjacent main measuring plates among the four main measuring plates extend into the third arc-shaped guide groove and slide in the third arc-shaped guide groove, and the second protrusions extend into the fourth arc-shaped guide groove and slide in the fourth arc-shaped guide groove; The first protrusions of the support strips of the other two adjacent main test plates among the four main test plates extend into and slide in the fifth arc-shaped guide slot, and the second protrusions extend into and slide in the sixth arc-shaped guide slot.

7. A forest fire reduced scale combustion test system according to claim 6, wherein, The third stop pin hole is provided on the rotating outer pivot, and a plurality of third stop pin holes are provided. The centers of the arcs where the centers of the plurality of third stop pin holes are located correspond to the center of the rotating outer pivot. The distance between the centers of the arcs where the centers of the plurality of third stop pin holes are located and the center of the rotating outer pivot is greater than the distance between the fifth arc-shaped guide slot and the center of the rotating outer pivot, and is less than the distance between the third arc-shaped guide slot and the center of the rotating outer pivot. A third plug pin is inserted into the third stop pin hole to prevent the first protrusion from sliding in the third arc-shaped guide slot and to prevent the second protrusion from sliding in the fourth arc-shaped guide slot. The fourth stop pin hole is provided on the rotating inner pivot, and a plurality of fourth stop pin holes are provided. The centers of the arcs where the centers of the plurality of fourth stop pin holes are located correspond to the center of the rotating inner pivot. The distance between the centers of the arcs where the centers of the plurality of third stop pin holes are located and the center of the rotating inner pivot is greater than the distance between the sixth arc-shaped guide slot and the center of the rotating outer pivot, and is less than the distance between the fifth arc-shaped guide slot and the center of the rotating outer pivot. A fourth plug pin is inserted into the fourth stop pin hole to prevent the first protrusion from sliding in the fifth arc-shaped guide slot and to prevent the second protrusion from sliding in the sixth arc-shaped guide slot.

8. A forest fire reduced scale combustion test system according to claim 6 or 7, characterised in that, The rotating outer pivot includes a first outer pivot plate and a second outer pivot plate which are symmetrically arranged about the connecting plate as a center of symmetry. The first outer pivot plate and the second outer pivot plate are both provided with the third arc-shaped guide slot and the fourth arc-shaped guide slot. The first outer pivot plate and the second outer pivot plate are connected by a first connecting portion and a second connecting portion. The first connecting portion is arranged on the side of the first outer pivot plate and the second outer pivot plate close to the connecting plate, and the second connecting portion is arranged on the side of the first outer pivot plate and the second outer pivot plate away from the connecting plate. The first connecting portion includes the first extension protrusion which is a connecting shaft, and the first extension protrusion is arranged in the first arc-shaped guide slot. The rotating inner pivot includes a first inner pivot plate and a second inner pivot plate which are symmetrically arranged about the connecting plate as a center of symmetry. The first inner pivot plate and the second inner pivot plate are both provided with the fifth arc-shaped guide slot and the sixth arc-shaped guide slot. The first inner pivot plate and the second inner pivot plate are connected by a third connecting portion and a fourth connecting portion. The third connecting portion is arranged on the side of the first inner pivot plate and the second inner pivot plate close to the connecting plate, and the fourth connecting portion is arranged on the side of the first inner pivot plate and the second inner pivot plate away from the connecting plate. The third connecting portion includes the second extension protrusion which is a connecting shaft, and the second extension protrusion is arranged in the second arc-shaped guide slot.

Images