An air curtain fire protection test platform

Abstract

The present invention provides an air curtain fire prevention test platform. The platform includes an air guide trough, a combustion chamber, a measurement and control unit, and a simulation generation unit. The air guide trough provides air supply conditions for the test platform; the combustion chamber provides the test platform with facilities for simulating the spread of combustion fire. The outer wall of the combustion chamber where the air inlet is located is provided with an external facade, simulating a high-rise residential building; the measurement and control unit is used to collect the temperature of the gas entering the combustion chamber and the temperature of the combustion flame at different positions. The simulation generation unit is connected to the combustion chamber to provide fuel gas and an ignition system for the burner in the combustion chamber. By setting air curtains with different angles and jet velocities, air curtain fire prevention tests can be conducted more intuitively. The width and thickness of the air curtain are variable, which can meet the needs of testing openings of different sizes. It is highly functional and easy to operate. It can also meet the needs of different fire source locations and single or multiple fire source combustion simulations, which is more in line with real cabin fire conditions and safer.

Description

Technical Field

[0001] The invention belongs to the technical field of fire simulation, and in particular relates to an air curtain fire protection test platform. Background Art

[0002] In recent years, the prevention and control of building fires has been a hot topic in the whole society. With the increasing maturity of urbanization in my country, a large number of high-rise and super-high-rise buildings have sprung up, and the situation of building fire prevention and control has become increasingly severe. Chamber fires and the opening fire overflows induced by them are important sub-processes in the dynamics of building fires. How to more effectively control the scale of chamber fires, prevent chamber fires from developing into opening fire overflows or reduce their impact, plays an important reference role in suppressing the spread of large-scale three-dimensional fires on the facades of buildings, and is also an important frontier scientific issue in the field of building fires. The existing fire prevention methods include horizontal eaves and air curtains. Among them, given the particularity of the evolution behavior of chamber fires under the conditions of air curtain jets, it will inevitably affect the opening fire overflow behavior induced by chamber fires, and play a protective effect against the spread of three-dimensional fires on the facades.

[0003] Air curtains, a common ventilation technology, were first used for thermal insulation between different building cavities and gradually gained popularity for ventilation and dust removal in mine tunnels. In recent years, air curtains have been widely used in ship cabins, atrium-style buildings, (ground-level) shops, entrances and exits of large warehouses, and long corridors. Currently, research has been conducted on the fire and smoke protection characteristics of air curtains during fires. By comparing the smoke spread, temperature, and CO concentration distribution patterns of long corridor fires under different air curtain jet conditions, it was found that jet velocity and angle are two key parameters in air curtain operation, which significantly affect their smoke and heat insulation performance. The optimal jet velocity and angle for air curtains were proposed. However, there is still little research on fires in conventional chambers without long corridor structures (such as ship cabins, atrium-style buildings, shops, warehouses, and other large spaces). There are also no relevant standards that clearly define the application scope and design parameters of air curtains. Whether the conclusions obtained are applicable to fire and smoke protection in chambers remains unclear. Summary of the Invention

[0004] The purpose of the present invention is to provide an air curtain fire protection test platform to address the above-mentioned deficiencies in the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides an air curtain fire protection test platform, which includes an air guide groove, a combustion chamber, a measurement and control unit and a simulation generation unit.

[0007] The air guide trough provides air supply conditions for the test platform. The air inlet end of the air guide trough is connected to the fan, and the air outlet end of the air guide trough is connected to the combustion chamber. The air guide trough includes a guide cover, a variable angle blade group and an adjustable port. The variable angle blade group is arranged inside the guide cover, and the adjustable port is arranged at the end of the guide cover.

[0008] The combustion chamber provides a test platform with a chamber fire space that simulates different states. The combustion chamber is equipped with at least three porous burners. An air inlet is provided on the side wall of the combustion chamber, and the air inlet is connected to the air outlet end of the air guide groove.

[0009] The outer wall of the combustion chamber where the air inlet is located is provided with a facade, simulating a high-rise residential building; an opening is provided on the facade, the opening is engaged with the air inlet, a slot is provided at the opening, and the adjustable port is installed in the slot, forming an air curtain to prevent fire in the cabin and its facade;

[0010] The measurement and control unit is used to collect the temperature of the gas entering the combustion chamber and the temperature of the flame generated by combustion at different positions. The measurement and control unit includes a cabin indoor flue gas temperature measurement mechanism and an external facade vertical temperature and radiation heat flow measurement mechanism. The cabin indoor flue gas temperature measurement mechanism is arranged in the combustion chamber, and the external facade vertical temperature and radiation heat flow measurement mechanism is arranged on the external facade;

[0011] The simulation generating unit is connected to the combustion chamber to provide fuel gas and ignition for the burner in the combustion chamber.

[0012] Furthermore, in the combustion chamber, except for the side walls and the top of the chamber where the opening is located, and except for the combustion chamber

[0013] Device

[0014] The bottom of the cabins at all locations are covered with an insulation layer.

[0015] Furthermore, the air guide cover is provided with a plurality of sealing openings and a plurality of screw holes, and the variable angle blade assembly is bolted to the air guide cover by passing nuts through the screw holes.

[0016] Furthermore, the variable-angle blade group includes a first venetian blind, a second venetian blind, an adjustable knob and a support plate, the first venetian blind and the second venetian blind are hingedly arranged, the first venetian blind and the second venetian blind are both arranged on the support plate, and the support plate is provided with multiple nuts, and the nuts correspond one-to-one to the screw holes.

[0017] Furthermore, the porous burner is in a rectangular shape, including a porous structure and an air connection pipe. The porous structure is located above the air connection pipe. The porous structure is arranged in an A×B array, the spacing between adjacent holes is 15 to 20 mm, and the hole diameter is 5 to 6 mm.

[0018] Furthermore, the adjustment angle of the adjustable port is 0 to 45 degrees.

[0019] Furthermore, a plurality of spray outlets are provided on the top of the combustion chamber for spraying fire extinguishing experiments.

[0020] Furthermore, the slot is a square opening or a rectangular opening with adjustable width.

[0021] Furthermore, the cabin flue gas temperature measurement mechanism and the facade vertical temperature and radiation heat flow measurement mechanism both include multiple thermocouples, and the multiple thermocouples are respectively arranged on the inner wall of the combustion chamber and the outer surface of the facade; the facade vertical temperature and radiation heat flow measurement mechanism also includes multiple radiation heat flow meters, which are arranged on the facade.

[0022] Furthermore, the simulation generating unit includes a natural gas supply mechanism and an electromagnetic valve ignition mechanism. A plurality of through holes are provided at the bottom of the combustion chamber. The natural gas supply mechanism is connected to the gas connection line through a pipeline passing through the through holes. The ignition mechanism includes a pulse igniter slot, and the pulse igniter slot is arranged in the hole of the porous structure.

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] (1) The present invention sets air curtains with different angles and jet velocities, which can more intuitively conduct air curtain fire prevention tests. The width and thickness of the air curtain are variable, which can meet the test requirements of openings of different sizes. It is highly functional and easy to operate.

[0025] (2) The present invention can remotely and accurately control the heat release rate of the fire source, and can also meet the requirements of different fire source locations and single or multiple fire source combustion simulations, which is more in line with actual cabin fire conditions and safer.

[0026] (3) The present invention is equipped with an air curtain system and a sprinkler system, which can more intuitively observe the fire prevention test under the coupling effect of the sprinkler and the air curtain, and provide a safe and effective training platform for fire protection teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of an air curtain fire protection test platform of the present invention;

[0028] Figure 2This is a schematic diagram of the structure of the variable angle blade assembly of the present invention;

[0029] Figure 3 Schematic diagram of the internal structure of the air guide groove of the present invention;

[0030] Figure 4 Schematic diagram of the adjustable port structure of the air guide groove of the present invention;

[0031] Figure 5 This is a schematic diagram of the installation of the air guide groove of the present invention;

[0032] Figure 6 This is a schematic structural diagram of a porous burner according to the present invention;

[0033] Figure 7 It is a rear view of the combustion chamber of the present invention;

[0034] Figure 8 Schematic diagram of different slot sizes on the facade of the present invention.

[0035] In the figure: 1. Air guide groove; 11. Air guide cover; 111. Sealing port; 112. Screw hole; 12. Variable angle blade group; 121. First louver; 122. Second louver; 123. Adjustable knob; 124. Support plate; 125. Nut; 13. Adjustable port; 2. Combustion chamber; 21. Multi-hole burner; 211. Multi-hole structure; 212. Air connection pipe; 22. Air inlet; 23. External facade; 231. Opening; 2311. Slot; 24. Spray outlet; 25. Through hole; 26. Insulation layer; 3. Measurement and control unit; 31. Cabin indoor flue gas temperature measurement mechanism; 311. Thermocouple; 32. External facade vertical temperature and radiation heat flow measurement mechanism; 4. Simulation generation unit; 41. Natural gas supply mechanism; 42. Ignition mechanism. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with specific embodiments and drawings.

[0037] Please refer to Figure 1 and Figure 5As shown, the present invention provides an air curtain fire protection test platform, including an air guide groove 1, a combustion chamber 2, a measurement and control unit 3 and a simulation generation unit 4; the air guide groove 1 provides air supply conditions for the test platform, the air inlet end of the air guide groove 1 is connected to the fan, and the air outlet end of the air guide groove 1 is connected to the combustion chamber 2, the air guide groove 1 includes a guide cover 11, a variable angle blade group 12 and an adjustable port 13, the variable angle blade group 12 is arranged inside the guide cover 11, and the adjustable port 13 is arranged at the end of the guide cover 11; the combustion chamber 2 provides a chamber fire space for simulating different states for the test platform, the combustion chamber 2 is equipped with a porous burner 21 at least three positions, and an air inlet 22 is provided on the side wall of the combustion chamber 2, and the air inlet 22 is connected to the air outlet end of the air guide groove 1; the air inlet of the combustion chamber The outer wall where the inlet 22 is located is provided with a facade 23, simulating a high-rise residential building. An opening 231 is provided on the facade 23, which interfaces with the air inlet 22. A slot 2311 is provided at the opening 231, and an adjustable port 13 is installed in the slot 2311, forming an air curtain fire protection scenario for the chamber and its facade. A measurement and control unit 3 is used to collect the temperature of the gas entering the combustion chamber and the temperature of the generated flame at different locations. The measurement and control unit 3 includes an in-chamber flue gas temperature measurement mechanism 31 and a facade vertical temperature and radiant heat flow measurement mechanism 32. The in-chamber flue gas temperature measurement mechanism 31 is located within the combustion chamber 2, while the facade vertical temperature and heat flow measurement mechanism 32 is located on the facade 23. A simulated generator unit 4 is connected to the combustion chamber 2, providing fuel gas and ignition to the burner within the combustion chamber. By setting air curtains with different angles and jet velocities, air curtain fire prevention tests can be conducted more intuitively. The variable width and thickness of the air curtains accommodate tests on openings of varying sizes, providing high functionality and ease of operation. The present invention can remotely and accurately control the heat release rate of the fire source, and can also meet the needs of fire sources in different locations and single or multiple fire source combustion simulations, which is more in line with actual cabin fire conditions and safer.

[0038] In some embodiments, for greater safety, a heat insulation layer 26 is laid on the side walls and the ceiling of the combustion chamber 2 except where the opening 231 is located, and on the bottom of the chamber except where the porous burner 21 is located.

[0039] In some embodiments, for reasonable spatial layout, such as Figure 3 As shown, the air guide cover 11 is provided with a plurality of sealing openings 111 and a plurality of screw holes 112 , and the variable angle blade assembly 12 is bolted into the air guide cover 11 by nuts passing through the screw holes 112 .

[0040] In some embodiments, in order to achieve air curtains with different angles and jet velocities, such as Figure 2As shown, the variable angle blade assembly 12 includes a first louver 121, a second louver 122, an adjustable knob 123 and a support plate 124. The first louver 121 and the second louver 122 are movably hinged. The first louver 121 and the second louver 122 are both set on the support plate 124. The support plate 124 is provided with a plurality of nuts 125. The nuts 125 correspond to the screw holes 112 one by one. Figure 4 As shown, the adjustment angle of the adjustable port 13 is 0-45°.

[0041] In some embodiments, in order to more realistically simulate the state of fire spread, such as Figure 6 As shown, the porous burner 21 is a rectangular parallelepiped, including a porous structure 211 and an air connection pipe 212. The porous structure 211 is located above the air connection pipe 212. The porous structure 211 is arranged in an A×B arrangement, with a spacing between two adjacent holes of 15 to 20 mm and a hole diameter of 5 to 6 mm.

[0042] In some embodiments, in order to implement a fire prevention test under the coupled effects of spraying and air curtain, a plurality of spray outlets 24 are further provided on the top of the combustion chamber 2 .

[0043] In some embodiments, in order to explore the evolution characteristics of heat flux and temperature of the cavity exterior surface under different openings of the air curtain, such as Figure 8 As shown, the slot 2311 is a square opening or a rectangular opening with adjustable width.

[0044] In some embodiments, in order to accurately collect data, such as Figure 7 As shown, the cabin indoor flue gas temperature measuring mechanism 31 and the facade vertical temperature and radiation heat flow measuring mechanism 32 both include multiple thermocouples 311, and the multiple thermocouples 311 are respectively arranged on the inner wall of the combustion chamber 2 and the outer surface of the facade 23; at the same time, the facade vertical temperature and radiation heat flow measuring mechanism 32 includes multiple radiation heat flow meters, which are arranged on the facade 23.

[0045] In some embodiments, in order to ensure the safe provision of a fire source, the simulation generating unit 4 includes a natural gas supply mechanism 41 and an ignition mechanism 42. A plurality of through holes 25 are provided at the bottom of the combustion chamber 2. The natural gas supply mechanism 41 is connected to the gas connection line 212 through a pipeline passing through the through holes 25. The ignition mechanism 42 includes a pulse igniter slot, which is arranged in the hole of the porous structure 211.

[0046] To better illustrate the variable angle and wind speed air curtain system of the air curtain fire protection test platform of the present invention, study the fire protection effect of different angles, jet velocities, and spray flow rates on cabin fires, and more safely and realistically simulate different fire sources in real life, the following is a detailed description using specific examples.

[0047] The main model of the combustion chamber 2 consists of a solid steel structure at a 1:5 scale. The combustion chamber 2 is a rectangular parallelepiped with internal dimensions of 1.2m × 0.9m × 0.9m (excluding insulation). Three spaces, 0.3m wide, are reserved in the center of the bottom of the combustion chamber 2 to accommodate three 0.3m × 0.3m porous burners 21. The front of the combustion chamber 2 is welded to an integral exterior facade 23. Slots are provided where the facade 23 overlaps the combustion chamber 2, allowing for the installation of openings 231 of varying sizes. A 0.8m high preparation space is provided below the combustion chamber 2, flush in length and width with the exterior of the combustion chamber 2. This space houses the simulated generator unit 4, which supplies fuel to the combustion chamber 2. The back of the preparation space (i.e., the side directly opposite the combustion chamber 2 opening) is designed as a swing-door structure. Wheels and a bracket are provided underneath the preparation space for easy mobility, and the height is 0.2m. Nine holes need to be drilled in the combustion chamber 2 at the location of the porous burner 21, and plugs need to be installed to allow fuel to flow from the stainless steel corrugated hose through the small holes into the porous burner 21. The diameter of the holes is about 1.5-2 cm, which is suitable for passing the stainless steel corrugated gas pipe. The holes are connected to the outside world through the preparation space at the bottom of the combustion chamber 2, and can be connected to the natural gas pipeline through a flow meter. The flow meter is a glass rotor gas flow meter with a graduation of no more than 0.2m. 3 / h, measuring range not less than 7m 3 / h.

[0048] The fan connected to the air duct 1 can be an axial flow fan with a diameter of 0.2-0.3m, and the air duct is a bellows. The adjustable port 13 located at the bottom of the air duct 1 can be adjusted using a quarter-circle slot, with an angle adjustment range of 0-45°. The air duct 1 has a reserved plugging screw hole to install the variable-angle blade assembly 12 and plugging plate to meet the needs of different air curtain outlet openings.

[0049] The simulated generator unit 4 consists of a natural gas supply system and an ignition system. The natural gas supply system comprises a natural gas cylinder, a pressure reducing valve, a pressure gauge, a volume flow meter, a rubber hose, a stainless steel inlet pipe, a standard four-way valve, a solenoid valve, and a gas burner. The natural gas cylinder, pressure reducing valve, pressure gauge, and volume flow meter are connected to the outside of the chamber via a rubber hose (placed in the preparation space below the chamber). The outlet of the volume flow meter is connected to a stainless steel inlet pipe, which then connects to the combustion chamber 2 through an air inlet located in the chamber floor. The indoor gas pipeline is split by a standard four-way valve and connected in series to porous burners 21 located throughout the chamber. The porous burners 21 are welded from 2-3mm high-strength, high-temperature-resistant steel plates to prevent deformation under high temperatures. The top hole diameter is 5mm, with a spacing of 20mm. The bottom surface features three circular holes evenly spaced along the centerline of the porous burner 21, each fitted with a plug. The porous burner 21 is a rectangular stainless steel structure, connected to the gas supply line 212 at the bottom and a porous structure 211 at the top, complete with a slot for a pulse igniter. The ignition system consists of a power supply, wires, a pulse igniter, and a remote control. The power supply is located outside the chamber, and the wires are encased in a ceramic tube. The pulse igniters are connected in parallel via the air inlet at the bottom of combustion chamber 2, and the igniters are controlled by a remote control. A small amount of smoke cakes mixed with carbon powder are placed around combustion chamber 2 to simulate fire smoke.

[0050] Threaded holes are reserved on the side walls and back walls of the combustion chamber 2 to match the clamping screws. Thermocouples pass through the threaded holes and are fixed by clamping screws for indoor temperature measurement. Above the combustion chamber 2, holes are reserved every 10 cm in the range of 2m-4m from the ground on the center line of the vertical wall for arranging thermocouples, which are also fixed with the above-mentioned clamping screws. Fixing points for overhang brackets are reserved on both sides of the combustion chamber 2, with a group of 10 cm intervals from 1.6m-2.5m (1 on each side). The matching overhang bracket is detachable with a cantilever length of 0.6m. The front of the combustion chamber 2 needs to be seamlessly connected to the vertical facade 23 and flush with the plane where it is located to avoid affecting air flow. Seven reserved holes with a diameter of 3 cm are set in the range of 2.05m-3.85m from the ground on the center line, and are equipped with heads for installing radiation heat flux meter measuring points. The measurement and control unit 3 includes a smoke temperature measurement mechanism 31 inside the cabin and a vertical temperature and radiation heat flux measurement mechanism 32 outside the facade. It consists of a thermocouple, a radiation heat flux meter, compensation wires, a data acquisition module, and a converter. The data acquisition module and converter are connected to a computer outside the cabin to collect data.

[0051] The front surface of combustion chamber 2 (i.e., the surface on the same side as the vertical wall) is provided with slots for installing openings 231 of varying sizes. The opening is a significant factor influencing combustion conditions within the combustion chamber. The opening (on the vertical wall side) of combustion chamber 2 is designed as a fully embedded type. The entire opening is inserted into the system through the slots to simulate combustion under different ventilation conditions. The design is divided into two series. One is a square opening with side lengths ranging from 0.3 to 0.6m, increasing by 0.05m, for a total of seven groups: 0.6m×0.6m, 0.5m×0.5m, 0.4m×0.4m, 0.3m×0.3m, 0.35m×0.35m, 0.45m×0.45m, and 0.55m×0.55m. The other is a variable-width opening with widths ranging from 0.1 to 0.6m, increasing by 0.1m, and a fixed height of 0.9m, for a total of six groups: 0.9m×0.6m, 0.9m×0.5m, 0.9m×0.4m, 0.9m×0.3m, 0.9m×0.2m, and 0.9m×0.1m. The opening can be made of a 3mm iron plate with a central opening and a quartz plate on the outer surface, which can withstand high temperatures and remain unchanged. Consideration should be given to using reinforcement ribs on the exterior surface of the combustion chamber's outer wall.

[0052] The vertical facade 23 is 5m long and 3m wide. The surface within 0.5m from the top of the combustion chamber 2 is paved with quartz plates for protection, and the surface outside 0.5m is paved with 3mm mica plates for protection, and reinforced ribs are used.

[0053] The working principle of the air curtain fire test platform of the present invention is as follows:

[0054] (1) When used to study the mechanism of the air curtain's effect on cabin fire. First, according to different test requirements, before the test, the air curtain 11 is changed on a quarter arc ( Figure 4 ) position to change the air curtain jet angle, and according to the opening size to block the guide cover 11, select the appropriate jet width and thickness (such as Figure 2 and Figure 3 As shown). At the same time, check that the system is properly installed and operating, and then start the test system. At the beginning of the test, first remotely activate the pulse ignition device on the porous burner 21. Then, open the natural gas supply valve in the lower compartment, and slowly introduce natural gas into the porous burner 21, ignited by the electric spark. (Here, the heat release rate and fire source location, as well as single or multiple fire sources, can be precisely controlled according to the specific test requirements.) Simultaneously, turn on the axial flow fan and set the wind speed as required. Using data collected by the measurement and control unit, analyze the impact of the evolutionary characteristics of the cabin fire under the air curtain jet conditions.

[0055] (2) When used to study the fire influence mechanism of different fire source positions under the air curtain state, the fire source heat release rate is precisely controlled by simulating the occurrence control device. At the same time, the fire source position is changed to explore the influence of the air curtain on the evolution characteristics of the chamber fire under different fire source positions, where the fire source positions include the middle position of the cabin, the rear position of the cabin, and the front position near the opening. The above is a cabin fire test under a single fire source. It is also possible to analyze the influence of the cabin fire evolution characteristic mechanism under the air curtain condition when multiple fire sources are burning together.

[0056] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air curtain fire protection test platform, characterized in that: It comprises an air guide groove (1), a combustion chamber (2), a measurement and control unit (3) and a simulation generation unit (4), The air guide groove (1) provides air supply conditions for the test platform. The air inlet end of the air guide groove (1) is connected to the fan, and the air outlet end of the guide groove (1) is connected to the combustion chamber (2). The guide groove (1) includes a guide cover (11), a variable angle blade group (12) and an adjustable port (13). The variable angle blade group (12) is arranged inside the guide cover (11), and the adjustable port (13) is arranged at the end of the guide cover (11); the guide cover (11) is provided with a plurality of sealing ports (111) and a plurality of screw holes (112), and the variable angle blade group (12) is bolted to the guide cover (11) through nuts passing through the screw holes (112); the porous burner (21) is in the shape of a rectangular parallelepiped, including a porous structure (211) and an air connection pipe (212), and the porous structure (211) is located above the air connection pipe (212); The combustion chamber (2) provides a chamber for simulating the spread of combustion fire under different conditions for the test platform. The combustion chamber (2) is equipped with at least three porous burners (21). An air inlet (22) is provided on the side wall of the combustion chamber (2). The air inlet (22) is connected to the air outlet end of the air guide groove (1). A heat insulation layer (26) is laid on the side wall and the top of the chamber except where the opening is located, and on the bottom of the chamber except where the burner (21) is located. The outer wall of the combustion chamber where the air inlet (22) is located is provided with an outer facade (23) to simulate a high-rise residential building; an opening (231) is provided on the outer facade (23), the opening (231) is engaged with the air inlet (22), a slot (2311) is provided at the opening (231), and the adjustable port (13) is installed at the slot (2311), forming an air curtain fire protection scene for the chamber and its outer facade; The measurement and control unit (3) is used to collect the temperature of the gas entering the combustion chamber and the temperature of the flame generated by combustion at different positions. The measurement and control unit (3) includes an in-chamber smoke temperature measuring mechanism (31) and an external vertical temperature and radiation heat flow measuring mechanism (32). The in-chamber smoke temperature measuring mechanism (31) is arranged in the combustion chamber (2), and the external vertical temperature and radiation heat flow measuring mechanism (32) is arranged on the external facade (23) and is located above the opening (231). The simulation generating unit (4) is connected to the combustion chamber (2) to provide fuel gas and ignition for the burner in the combustion chamber.

2. The air curtain fire protection test platform according to claim 1, characterized in that: The variable angle blade group (12) comprises a first venetian blind (121), a second venetian blind (122), an adjustable knob (123) and a support plate (124); the first venetian blind (121) and the second venetian blind (122) are movably hinged; the first venetian blind (121) and the second venetian blind (122) are both arranged on the support plate (124); the support plate (124) is provided with a plurality of nuts (125); the nuts (125) correspond one-to-one to the screw holes (112).

3. The air curtain fire protection test platform according to claim 2, characterized in that: The porous structure (211) is arranged in an A×B array, the spacing between two adjacent holes is 15 to 20 mm, and the diameter of the hole is 5 to 6 mm.

4. The air curtain fire protection test platform according to claim 3, characterized in that: The adjustable angle of the adjustable port (13) is 0-45°.

5. The air curtain fire protection test platform according to claim 4, characterized in that: The top of the combustion chamber (2) is also provided with a plurality of spray outlets (24) which can be used for spray fire extinguishing experiments.

6. The air curtain fire protection test platform according to claim 5, characterized in that: The slot (2311) is a square opening or a rectangular opening with adjustable width.

7. The air curtain fire protection test platform according to claim 6, characterized in that: The cabin flue gas temperature measuring mechanism (31) and the facade vertical temperature and radiation heat flow measuring mechanism (32) both include a plurality of thermocouples (311), and the plurality of thermocouples (311) are respectively arranged on the inner wall of the combustion chamber (2) and the outer surface of the facade (23); the facade vertical temperature and radiation heat flow measuring mechanism (32) also includes a plurality of radiation heat flow meters, which are arranged on the facade (23).

8. The air curtain fire protection test platform according to claim 3, characterized in that: The simulation generating unit (4) comprises a natural gas supply mechanism (41) and a solenoid valve ignition mechanism (42); a plurality of through holes (25) are provided at the bottom of the combustion chamber (2); the natural gas supply mechanism (41) is connected to the gas connection pipeline (212) via a pipeline passing through the through holes (25); the ignition mechanism (42) comprises a pulse igniter slot, and the pulse igniter slot is arranged in a hole of the porous structure (211).

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