Foam curtain generation and performance characterization device, method and application

Abstract

The invention discloses a foam curtain generation and performance characterization device and method and application. The device comprises a foam curtain injection system used for generating a foam curtain, a combustion system used for heating the foam curtain and a motion capture system used for capturing the motion trail of the foam curtain. The foam curtain injection system comprises a foam mixed liquid tank body, a pump body and a foam curtain injector, the pump body is arranged between the foam mixed liquid tank body and the foam curtain injector, and the pump body is connected with the foam curtain injector through a pipeline; the combustion system comprises a combustion gas cylinder, a combustion improver cylinder, a combustion mixer and a combustor, the combustion gas cylinder and the combustion improver cylinder are respectively connected with the input end of the combustion mixer through pipelines, and the combustor is connected with the output end of the combustion mixer. The device can monitor the motion trail of the marking section foam curtain in real time and control the angle of combustion flame, so that the marking section foam curtain receives heat radiation all the time, the actual working condition is simulated more truly, and the actual heat insulation effect is reflected.

Description

Technical Field

[0001] This invention relates to the field of thermal protection technology, specifically to a device, method, and application for generating and characterizing a foam curtain. Background Technology

[0002] Compared to building fires, petrochemical fires are characterized by rapid combustion rates, high calorific values, and high flame temperatures and heat radiation intensity. Therefore, equipment surrounding a petrochemical fire is easily affected by heat radiation, causing it to overheat and potentially leading to malfunctions and secondary accidents. For this reason, it is necessary to isolate and protect equipment surrounding a petrochemical fire.

[0003] Currently, the main isolation and protection methods include water spray or foam curtains, which protect the device by placing a water spray or foam curtain between the protected device and the fire. When testing the protective effect of water spray or foam curtains, small-scale simulation devices are often used, i.e., small-scale fire sources or small-scale water spray / foam curtain devices. It is difficult to use full-scale fire sources and foam / water spray devices because the cost of setting them up is very high, and the pollution from a real fire source is also very severe. Furthermore, small-scale water spray / foam curtain simulation devices typically only test the heat insulation of the initial spray section of the water spray or foam curtain, which differs significantly from the actual effect; and the flame heat and thermal radiation generated by a small-scale fire source differ greatly from a real fire, making it difficult to simulate real working conditions.

[0004] To simulate real-world working conditions, Chinese patent CN107490596A discloses a performance testing device and method for fire-resistant water curtains. The testing device includes a lifting system, a water distribution system, a water supply system, a weighing system, a testing system, and a fire source. It can be used to evaluate the water distribution performance and fire insulation performance of different types of fire-resistant water curtains at different installation heights. By conducting comparative analysis of the water distribution performance and fire insulation performance of fire-resistant water curtains at the specified installation height and the tested installation height, the device can evaluate whether the various performance requirements of the fire-resistant water curtain at the tested installation height meet or are not lower than the performance requirements equivalent to those specified in the standard. Although the spray device uses real water spray, the water spray is from top to bottom, without taking into account situations where the water spray is from the side or from bottom to top. Moreover, as the distance increases, the momentum of the water / foam jet gradually decreases, and the air resistance gradually increases. The contact surface between the jet and the air breaks up, and the jet changes from a concentrated stream to a loose fluid, with some falling. This affects the heat insulation and cooling performance of the jet. This phenomenon is particularly significant when the jet is sprayed from bottom to top or from the side.

[0005] Therefore, there is an urgent need to study a thermal insulation performance testing device and method to more realistically simulate actual working conditions and reflect the actual thermal insulation effect. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a foam curtain generation and performance characterization device, method, and application. It can monitor the movement trajectory of the marked foam curtain segment in real time and control the angle of the combustion flame, thereby ensuring that the marked foam curtain segment receives heat radiation at all times, more realistically simulating actual working conditions and reflecting the actual heat insulation effect.

[0007] The technical solution adopted in this invention is as follows:

[0008] The present invention provides a foam curtain generation and performance characterization device, including a foam curtain spraying system for generating a foam curtain, a combustion system for heating the foam curtain, and a motion capture system disposed around the foam curtain for capturing the movement trajectory of the foam curtain.

[0009] The foam curtain spraying system includes a foam mixture tank, a pump body, and a foam curtain sprayer. The pump body is located between the foam mixture tank and the foam curtain sprayer, and the pump body and the foam curtain sprayer are connected by a pipeline.

[0010] The combustion system includes a combustion gas cylinder, a combustion accelerator cylinder, a combustion mixer, and a burner. The combustion gas cylinder and the combustion accelerator cylinder are respectively connected to the input end of the combustion mixer through pipelines, and the burner is connected to the output end of the combustion mixer.

[0011] In the above technical solution, the foam mixture tank stores a foam mixture, which is a mixture of foam liquid and water. The foam liquid is selected from at least one of protein foam liquid (P), fluoroprotein foam liquid (FP), film-forming fluoroprotein foam liquid (FFFP), synthetic foam liquid (S), and aqueous film-forming foam liquid (AFFF).

[0012] In the above technical solution, the combustion gas cylinder stores combustion gas, which is a high-calorific-value fuel, such as dicyandiylacetylene.

[0013] In the above technical solution, the combustion-supporting agent bottle stores a combustion-supporting agent, such as oxygen or ozone.

[0014] In the above technical solution, the foam sprayer sprays foam at a flow rate of 50L / s-500L / s, which can be industrial-grade foam flow rate to generate large-size foam curtains.

[0015] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, a Venturi tube is provided on the pipe between the pump body and the foam curtain injector.

[0016] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, a feed trough is connected above the venturi tube, and the feed trough contains a color indicator.

[0017] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, the foam curtain injector is a positive pressure foam generator or a negative pressure foam generator.

[0018] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, the spraying end of the foam curtain sprayer is a circular spraying nozzle or a flat spraying nozzle.

[0019] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, a first flow control valve is provided on the connecting pipe between the combustion gas cylinder and the combustion mixer, and a second flow control valve is provided on the connecting pipe between the combustion aid cylinder and the combustion mixer.

[0020] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, the burner and the combustion mixer are connected by a hose, and a support rotation mechanism for controlling the rotation angle of the burner is provided below the burner.

[0021] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, the burner includes a conical shell, and a plurality of uniformly arranged combustion nozzles are provided on the outer end face of the conical shell.

[0022] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, the motion capture system includes a plurality of cameras, which are respectively arranged on the front, back, upper and lower parts of the foam curtain, and at least two cameras are provided on the front, back, upper and lower parts of the foam curtain.

[0023] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, a control system is also included, wherein the burner, the first flow control valve, the second flow control valve, the support rotation mechanism, and the camera are all connected to the control system.

[0024] In a preferred embodiment of the foam curtain thermal insulation performance testing device of the present invention, the control system includes a control module, a data acquisition module, and a processor;

[0025] The control module is used to control the on / off state of the burner, the flame direction of the burner, and the flow rate of the first flow control valve and the second flow control valve.

[0026] The acquisition module is used to acquire image information captured by the camera;

[0027] The processor is used to receive and process the image information acquired by the acquisition module.

[0028] When processing image information, the processor can analyze the size and coordinates of the foam curtain, namely the length, width, thickness and three-dimensional coordinates of the foam curtain, so as to obtain the volume of the foam curtain, and then determine the heat insulation performance of the foam curtain by the volume change of the foam curtain.

[0029] The present invention also provides a method for testing the thermal insulation performance of a foam curtain, which utilizes the above-mentioned testing device and includes the following steps:

[0030] (1) Place the foam mixture in the foam mixture tank, turn on the pump, and at the same time turn on the burner and ignite to form a high-temperature flame.

[0031] (2) Add color indicator to the feed trough above the venturi tube. The color indicator enters part of the foam mixture and is sprayed through the foam curtain sprayer to form a marked section foam curtain with color indicator. During the spraying process, the marked section foam curtain receives high-intensity heat radiation generated by the high-temperature flame of the burner.

[0032] (3) The camera around the marked section foam curtain acquires images of the marked section foam curtain in real time, the control system acquires the images collected by the camera and processes them, and calculates the heat insulation performance of the foam curtain.

[0033] In the preferred embodiment of the foam curtain thermal insulation performance test method of the present invention, in step (2), during the process of using a burner to radiate heat to the marked section of foam curtain, the flame direction is adjusted by a support rotation mechanism according to the test requirements, and the flow rates of combustion gas and combustion aid are adjusted by a first flow control valve and a second flow control valve, thereby adjusting the flame heat.

[0034] In a preferred embodiment of the foam curtain thermal insulation performance testing method of the present invention, the calculation formula for the thermal insulation performance of the foam curtain in step (3) is as follows:

[0035] Q = V1 / T*V

[0036] Where V is the initial ejection volume of the marked section foam curtain, V1 is the volume of the marked section foam curtain before landing, and T is the time from ejection to landing.

[0037] The present invention also provides an application of a foam curtain generation and performance characterization device in the process of testing the thermal insulation effect of foam curtains.

[0038] The beneficial effects of this invention are as follows:

[0039] (1) The foam curtain generation and performance characterization device provided by the present invention has an adjustable burner angle, so that the foam curtain can receive heat radiation at all times; in addition, since the burner angle is adjustable, the heat radiation direction of the combustion flame can be adjusted in real time, so as to simulate the influence of heat radiation of various fires on the fluid during the entire flow process, and can more realistically simulate the actual fire conditions.

[0040] (2) The foam curtain generation and performance characterization device provided by the present invention adopts a motion capture system to capture the motion trajectory of the marked segment foam curtain in real time, which can more accurately obtain the heat insulation performance of the foam curtain, provide technical reference for heat insulation protection, and reduce the harm caused by fire. Attached Figure Description

[0041] To clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of the foam curtain thermal insulation performance testing device of the present invention.

[0043] The image is labeled as follows:

[0044] 1. Foam curtain spraying system; 11. Foam mixture tank; 12. Pump body; 13. Foam curtain sprayer; 14. Venturi tube; 15. Feed trough;

[0045] 2. Combustion system; 21. Combustion gas cylinder; 22. Combustion oxidizer cylinder; 23. Combustion mixer; 24. Burner; 25. First flow control valve; 26. Second flow control valve; 27. Support rotation mechanism.

[0046] 3. Motion capture system; 31. Camera;

[0047] 4. Marking section foam curtain. Detailed Implementation

[0048] This invention provides a device, method, and application for generating and characterizing a foam curtain. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0049] In the description of this invention, it should be understood that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] The present invention will now be described in detail with reference to the accompanying drawings.

[0051] Example 1

[0052] Reference Figure 1 This embodiment provides a foam curtain generation and performance characterization device, including a foam curtain spraying system 1 for generating a foam curtain, a combustion system 2 for heating the foam curtain to provide thermal radiation, and a motion capture system 3 disposed around the foam curtain to capture the movement trajectory of the foam curtain, and also includes a control system for controlling the combustion system 2 and the motion capture system 3.

[0053] The specific structure of the foam curtain spraying system 1 described above is as follows:

[0054] The aforementioned foam curtain spraying system 1 includes a foam mixture tank 11, a pump body 12, and a foam curtain sprayer 13. The pump body 12 is disposed between the foam mixture tank 11 and the foam curtain sprayer 13, and the pump body 12 and the foam curtain sprayer 13 are connected by a pipe. A Venturi tube 14 is installed on the pipe between the pump body 12 and the foam curtain sprayer 13. In addition, a feed trough 15 connected to the Venturi tube 14 is connected above the Venturi tube. The feed trough 15 contains a color indicator to mark the foam curtain and form marked segments of the foam curtain. Furthermore, the foam mixture tank 11 stores a foam mixture, which is a mixture of foam liquid and water. The foam liquid is selected as an aqueous film-forming foam liquid.

[0055] The foam curtain injector 13 mentioned above is a positive pressure foam generator.

[0056] The spray end of the foam curtain sprayer 13 is a circular spray nozzle.

[0057] The specific structure of the combustion system 2 described above is as follows:

[0058] The combustion system 2 includes a combustion gas cylinder 21, an oxidizer cylinder 22, a combustion mixer 23, and a burner 24. The combustion gas cylinder 21 and the oxidizer cylinder 22 are respectively connected to the input end of the combustion mixer 23 through pipelines, and the burner 24 is connected to the output end of the combustion mixer 23.

[0059] In addition, a first flow control valve 25 is provided on the connecting pipe between the combustion gas cylinder 21 and the combustion mixer 23, and a second flow control valve 26 is provided on the connecting pipe between the combustion aid cylinder and the combustion mixer 23. The flow rates of the combustion gas and the combustion aid can be adjusted by the first flow control valve and the second flow control valve, thereby controlling the combustion heat of the burner.

[0060] The burner 24 and the combustion mixer 23 are connected by a flexible hose. A support rotation mechanism 27 for controlling the burner's rotation angle is located below the burner 24. This connection facilitates adjustment of the burner's rotation angle without affecting the delivery of the combustion mixture. Furthermore, controlling the burner's rotation via the support rotation mechanism allows for adjustment of the burner's rotation angle, i.e., adjusting the direction of the combustion flame, ensuring the foam curtain receives constant heat radiation. Specifically, the support rotation mechanism can employ the elevation and horizontal rotation structure of a fire monitor. The burner is mounted on the support rotation mechanism, and it can swing according to the movement of the marked section of the foam curtain, ensuring the burner's flame direction is directly aligned with the center of the marked section. The burner 24 includes a conical shell with several evenly arranged combustion nozzles on its outer end face, increasing the heat radiation area.

[0061] The aforementioned burner uses a mixture of high-calorific-value fuel and combustion-supporting gas for combustion, producing a high-radiation jet flame with a surface heat radiation intensity of up to 1000 kW / m². 2 In this way, even with a relatively small burner area, the foam in the marked section receives thermal radiation from a real hydrocarbon jet flame. In reality, a real hydrocarbon jet flame is a non-premixed combustion, and the thermal radiation intensity on the flame surface is relatively low, less than 350 kW / m². 2 However, the overall flame area is large. In contrast, this embodiment uses premixed combustion, which, although the combustion surface is small, can simulate real heat radiation by increasing the heat radiation intensity of the flame surface.

[0062] The aforementioned combustion cylinder 21 stores combustion gas, which is a high-calorific-value fuel, such as dicyandiylacetylene.

[0063] The aforementioned combustion accelerant bottle 22 contains a combustion accelerant, which is oxygen.

[0064] The specific structure of the motion capture system 3 described above is as follows:

[0065] The motion capture system 3 described above includes several cameras 31, which are respectively arranged on the front, back, top and bottom of the foam curtain, and two cameras 31 are provided on the front, back, top and bottom of the foam curtain.

[0066] In addition, the foam curtain generation and performance characterization device provided in this embodiment also includes a control system, and the burner, the first flow control valve, the second flow control valve, the support rotation mechanism and the camera are all connected to the control system.

[0067] Specifically, the aforementioned control system includes a control module, a data acquisition module, and a processor;

[0068] The aforementioned control module is used to control the on / off state of the burner, the rotation angle of the support rotation mechanism (i.e., the flame direction of the burner), and the flow rate of the first flow control valve and the second flow control valve.

[0069] The aforementioned acquisition module is used to acquire image information captured by the camera;

[0070] The processor described above is used to receive and process the image information acquired by the acquisition module.

[0071] In addition, to ensure that the burner's flame direction is directly aligned with the center of the marked foam curtain, the processor is also used to feed back the processed image information to the control module. The control module adjusts the rotation angle of the support rotation mechanism based on the image information, that is, adjusts the flame direction of the burner.

[0072] Based on the aforementioned foam curtain generation and performance characterization device, this embodiment tests the thermal insulation performance of the foam curtain, including the following steps:

[0073] (1) Place the foam mixture in the foam mixture tank, turn on the pump, and at the same time turn on the burner and ignite to form a high-temperature flame.

[0074] (2) Add color indicator to the feed trough above the venturi tube. The color indicator enters part of the foam mixture and is sprayed through the foam curtain sprayer to form a marked section foam curtain 4 with color indicator. During the spraying process, the marked section foam curtain receives high-intensity heat radiation generated by the high-temperature flame of the burner.

[0075] In this step, during the process of using a burner to radiate heat onto the marked section of foam curtain, the flame direction is adjusted by a support rotation mechanism according to the test requirements, and the flow rates of combustion gas and combustion aid are adjusted by a first flow control valve and a second flow control valve, thereby adjusting the flame heat.

[0076] (3) Cameras around the marked section of the foam curtain acquire images of the foam curtain in real time. The control system acquires and processes the images captured by the cameras to calculate the thermal insulation performance of the foam curtain. The formula for calculating the thermal insulation performance of the foam curtain is:

[0077] Q = V1 / T*V

[0078] Where V is the initial ejection volume of the marked segment foam curtain, V1 is the volume of the marked segment foam curtain before landing, and T is the time from ejection to landing. The volume of the foam curtain is calculated based on the images acquired by the camera, analyzing the dimensions of the foam curtain. The control system can analyze the length, width, thickness, and three-dimensional coordinates of the foam curtain from the images acquired by the camera to obtain the volume of the foam curtain.

[0079] In this embodiment, a low-expansion aqueous film-forming foam liquid is used, which is mixed with water, and the foaming ratio is 4 times. The foam curtain is subjected to 10 kW / m² of heat radiation during the entire spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.54 m3. The time is 14 s. Then the thermal insulation performance of the foam curtain is Q = 0.039.

[0080] Example 2

[0081] Reference Figure 1 This embodiment provides a foam curtain generation and performance characterization device, including a foam curtain spraying system 1 for generating a foam curtain, a combustion system 2 for heating the foam curtain to provide thermal radiation, and a motion capture system 3 disposed around the foam curtain to capture the movement trajectory of the foam curtain, and also includes a control system for controlling the combustion system 2 and the motion capture system 3.

[0082] The specific structure of the foam curtain spraying system 1 described above is as follows:

[0083] The aforementioned foam curtain spraying system 1 includes a foam mixture tank 11, a pump body 12, and a foam curtain sprayer 13. The pump body 12 is disposed between the foam mixture tank 11 and the foam curtain sprayer 13. The pump body 12 and the foam curtain sprayer 13 are connected by a pipe, and a Venturi tube 14 is provided on the pipe between the pump body 12 and the foam curtain sprayer 13. In addition, a feed trough 15 connected to the Venturi tube 14 is connected above the Venturi tube 14, and the feed trough 15 contains a color indicator.

[0084] In addition, the foam mixture tank 11 contains a foam mixture, which is a mixture of foam liquid and water, and the foam liquid is selected as an aqueous film-forming foam liquid.

[0085] The foam curtain injector 13 mentioned above is a positive pressure foam generator.

[0086] The spray end of the foam curtain sprayer 13 is a flat spray nozzle.

[0087] The specific structure of the combustion system 2 described above is as follows:

[0088] The combustion system 2 includes a combustion gas cylinder 21, an oxidizer cylinder 22, a combustion mixer 23, and a burner 24. The combustion gas cylinder 21 and the oxidizer cylinder 22 are respectively connected to the input end of the combustion mixer 23 through pipelines, and the burner 24 is connected to the output end of the combustion mixer 23.

[0089] In addition, a first flow control valve 25 is provided on the connecting pipe between the combustion gas cylinder 21 and the combustion mixer 23, and a second flow control valve 26 is provided on the connecting pipe between the combustion aid cylinder and the combustion mixer 23. The flow rates of the combustion gas and the combustion aid can be adjusted by the first flow control valve and the second flow control valve, thereby controlling the combustion heat of the burner.

[0090] The burner 24 and the combustion mixer 23 are connected by a flexible hose. A support rotation mechanism 27 for controlling the burner's rotation angle is located below the burner 24. This flexible hose connection facilitates adjustment of the burner's rotation angle without affecting the delivery of the combustion mixture. Furthermore, controlling the burner's rotation via the support rotation mechanism allows for adjustment of the burner's rotation angle, i.e., adjusting the direction of the combustion flame, ensuring the foam curtain receives constant heat radiation. Specifically, the support rotation mechanism can be a fire monitor with both elevation and horizontal rotation capabilities. The burner is mounted on the support rotation mechanism, and it can swing according to the movement of the marked section of the foam curtain, ensuring the burner's flame direction is directly aligned with the center of the marked section of the foam curtain.

[0091] The burner 24 includes a conical shell, and a number of uniformly arranged combustion nozzles are provided on the outer end face of the conical shell, which can increase the heat radiation area.

[0092] The aforementioned combustion cylinder 21 stores combustion gas, which is a high-calorific-value fuel, such as dicyandiylacetylene.

[0093] The aforementioned combustion accelerant bottle 22 contains a combustion accelerant, which is oxygen.

[0094] The specific structure of the motion capture system 3 described above is as follows:

[0095] The motion capture system 3 described above includes several cameras 31, which are respectively arranged on the front, back, top and bottom of the foam curtain, and two cameras 31 are provided on the front, back, top and bottom of the foam curtain.

[0096] In addition, the foam curtain generation and performance characterization device provided in this embodiment also includes a control system, and the burner, the first flow control valve, the second flow control valve, the support rotation mechanism and the camera are all connected to the control system.

[0097] Specifically, the aforementioned control system includes a control module, a data acquisition module, and a processor;

[0098] The aforementioned control module is used to control the burner's on / off state, the burner's flame direction, and the flow rate of the first and second flow control valves.

[0099] The aforementioned acquisition module is used to acquire image information captured by the camera;

[0100] The processor described above is used to receive and process the image information acquired by the acquisition module.

[0101] Based on the aforementioned foam curtain generation and performance characterization device, this embodiment tests the thermal insulation performance of the foam curtain, including the following steps:

[0102] (1) Place the foam mixture in the foam mixture tank, turn on the pump, and at the same time turn on the burner and ignite to form a high-temperature flame.

[0103] (2) Add color indicator to the feed trough above the venturi tube. The color indicator enters part of the foam mixture and is sprayed through the foam curtain sprayer to form a marked section foam curtain with color indicator. During the spraying process, the marked section foam curtain receives high-intensity heat radiation generated by the high-temperature flame of the burner.

[0104] In this step, during the process of using a burner to radiate heat onto the marked section of foam curtain, the flame direction is adjusted by a support rotation mechanism according to the test requirements, and the flow rates of combustion gas and combustion aid are adjusted by a first flow control valve and a second flow control valve, thereby adjusting the flame heat.

[0105] (3) Cameras around the marked section of the foam curtain acquire images of the foam curtain in real time. The control system acquires and processes the images captured by the cameras to calculate the thermal insulation performance of the foam curtain. The formula for calculating the thermal insulation performance of the foam curtain is:

[0106] Q = V1 / T*V

[0107] Where V is the initial ejection volume of the marked section foam curtain, V1 is the volume of the marked section foam curtain before landing, and T is the time from ejection to landing.

[0108] The volume of the foam curtain is calculated by analyzing the dimensions of the foam curtain based on the images acquired by the camera. The control system can analyze the length, width, thickness, and three-dimensional coordinates of the foam curtain from the images acquired by the camera to obtain the volume of the foam curtain.

[0109] In this embodiment, a low-expansion aqueous film-forming foam liquid is used, which is mixed with water, and the foaming ratio is 4 times. The foam curtain is subjected to 15 kW / m² of heat radiation during the entire spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.44 m3. The time is 14 s. Then the thermal insulation performance of the foam curtain is Q = 0.031.

[0110] Example 3

[0111] Reference Figure 1This embodiment provides a foam curtain generation and performance characterization device, including a foam curtain spraying system 1 for generating a foam curtain, a combustion system 2 for heating the foam curtain to provide thermal radiation, and a motion capture system 3 disposed around the foam curtain to capture the movement trajectory of the foam curtain, and also includes a control system for controlling the combustion system 2 and the motion capture system 3.

[0112] The specific structure of the foam curtain spraying system 1 described above is as follows:

[0113] The aforementioned foam curtain spraying system 1 includes a foam mixture tank 11, a pump body 12, and a foam curtain sprayer 13. The pump body 12 is disposed between the foam mixture tank 11 and the foam curtain sprayer 13. The pump body 12 and the foam curtain sprayer 13 are connected by a pipe, and a Venturi tube 14 is provided on the pipe between the pump body 12 and the foam curtain sprayer 13. In addition, a feed trough 15 connected to the Venturi tube 14 is connected above the Venturi tube 14, and the feed trough 15 contains a color indicator.

[0114] In addition, the foam mixture tank 11 contains a foam mixture, which is a mixture of foam liquid and water, and the foam liquid is selected as an aqueous film-forming foam liquid.

[0115] The aforementioned foam curtain injector 13 is a negative pressure foam generator.

[0116] The spray end of the foam curtain sprayer 13 is a flat spray nozzle.

[0117] The specific structure of the combustion system 2 described above is as follows:

[0118] The combustion system 2 includes a combustion gas cylinder 21, an oxidizer cylinder 22, a combustion mixer 23, and a burner 24. The combustion gas cylinder 21 and the oxidizer cylinder 22 are respectively connected to the input end of the combustion mixer 23 through pipelines, and the burner 24 is connected to the output end of the combustion mixer 23.

[0119] In addition, a first flow control valve 25 is provided on the connecting pipe between the combustion gas cylinder 21 and the combustion mixer 23, and a second flow control valve 26 is provided on the connecting pipe between the combustion aid cylinder and the combustion mixer 23. The flow rates of the combustion gas and the combustion aid can be adjusted by the first flow control valve and the second flow control valve, thereby controlling the combustion heat of the burner.

[0120] The burner 24 and the combustion mixer 23 are connected by a flexible hose. A support rotation mechanism 27 for controlling the burner's rotation angle is located below the burner 24. This flexible hose connection facilitates adjustment of the burner's rotation angle without affecting the delivery of the combustion mixture. Furthermore, controlling the burner's rotation via the support rotation mechanism allows for adjustment of the burner's rotation angle, i.e., adjusting the direction of the combustion flame, ensuring the foam curtain receives constant heat radiation. Specifically, the support rotation mechanism can be a fire monitor with both elevation and horizontal rotation capabilities. The burner is mounted on the support rotation mechanism, and it can swing according to the movement of the marked section of the foam curtain, ensuring the burner's flame direction is directly aligned with the center of the marked section of the foam curtain.

[0121] The burner 24 includes a conical shell, and a number of uniformly arranged combustion nozzles are provided on the outer end face of the conical shell, which can increase the heat radiation area.

[0122] The aforementioned combustion cylinder 21 stores combustion gas, which is a high-calorific-value fuel, such as dicyandiylacetylene.

[0123] The aforementioned combustion accelerant bottle 22 contains a combustion accelerant, which is oxygen.

[0124] The specific structure of the motion capture system 3 described above is as follows:

[0125] The motion capture system 3 described above includes several cameras 31, which are respectively arranged on the front, back, top and bottom of the foam curtain, and two cameras 31 are provided on the front, back, top and bottom of the foam curtain.

[0126] In addition, the foam curtain generation and performance characterization device provided in this embodiment also includes a control system, and the burner, the first flow control valve, the second flow control valve, the support rotation mechanism and the camera are all connected to the control system.

[0127] Specifically, the aforementioned control system includes a control module, a data acquisition module, and a processor;

[0128] The aforementioned control module is used to control the burner's on / off state, the burner's flame direction, and the flow rate of the first and second flow control valves.

[0129] The aforementioned acquisition module is used to acquire image information captured by the camera;

[0130] The processor described above is used to receive and process the image information acquired by the acquisition module.

[0131] Based on the aforementioned foam curtain generation and performance characterization device, this embodiment tests the thermal insulation performance of the foam curtain, including the following steps:

[0132] (1) Place the foam mixture in the foam mixture tank, turn on the pump, and at the same time turn on the burner and ignite to form a high-temperature flame.

[0133] (2) Add color indicator to the feed trough above the venturi tube. The color indicator enters part of the foam mixture and is sprayed through the foam curtain sprayer to form a marked section foam curtain with color indicator. During the spraying process, the marked section foam curtain receives high-intensity heat radiation generated by the high-temperature flame of the burner.

[0134] In this step, during the process of using a burner to radiate heat onto the marked section of foam curtain, the flame direction is adjusted by a support rotation mechanism according to the test requirements, and the flow rates of combustion gas and combustion aid are adjusted by a first flow control valve and a second flow control valve, thereby adjusting the flame heat.

[0135] (3) Cameras around the marked section of the foam curtain acquire images of the foam curtain in real time. The control system acquires and processes the images captured by the cameras to calculate the thermal insulation performance of the foam curtain. The formula for calculating the thermal insulation performance of the foam curtain is:

[0136] Q = V1 / T*V

[0137] Where V is the initial ejection volume of the marked section foam curtain, V1 is the volume of the marked section foam curtain before landing, and T is the time from ejection to landing.

[0138] The volume of the foam curtain is calculated by analyzing the dimensions of the foam curtain based on the images acquired by the camera. The control system can analyze the length, width, thickness, and three-dimensional coordinates of the foam curtain from the images acquired by the camera to obtain the volume of the foam curtain.

[0139] In this embodiment, a low-expansion aqueous film-forming foam liquid is used, which is mixed with water, and the foaming ratio is 4 times. The foam curtain is subjected to 20 kW / m² of heat radiation during the entire spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.32 m3. The time is 14 s. Then the thermal insulation performance of the foam curtain is Q = 0.023.

[0140] Example 4

[0141] Reference Figure 1 This embodiment provides a foam curtain generation and performance characterization device, including a foam curtain spraying system 1 for generating a foam curtain, a combustion system 2 for heating the foam curtain to provide thermal radiation, and a motion capture system 3 disposed around the foam curtain to capture the movement trajectory of the foam curtain, and also includes a control system for controlling the combustion system 2 and the motion capture system 3.

[0142] The specific structure of the foam curtain spraying system 1 described above is as follows:

[0143] The aforementioned foam curtain spraying system 1 includes a foam mixture tank 11, a pump body 12, and a foam curtain sprayer 13. The pump body 12 is disposed between the foam mixture tank 11 and the foam curtain sprayer 13. The pump body 12 and the foam curtain sprayer 13 are connected by a pipe, and a Venturi tube 14 is provided on the pipe between the pump body 12 and the foam curtain sprayer 13. In addition, a feed trough 15 connected to the Venturi tube 14 is connected above the Venturi tube 14, and the feed trough 15 contains a color indicator.

[0144] In addition, the foam mixture tank 11 contains a foam mixture, which is a mixture of foam liquid and water, and the foam liquid is selected as an aqueous film-forming foam liquid.

[0145] The foam curtain injector 13 mentioned above is a positive pressure foam generator.

[0146] The spray end of the foam curtain sprayer 13 is a flat spray nozzle.

[0147] The specific structure of the combustion system 2 described above is as follows:

[0148] The combustion system 2 includes a combustion gas cylinder 21, an oxidizer cylinder 22, a combustion mixer 23, and a burner 24. The combustion gas cylinder 21 and the oxidizer cylinder 22 are respectively connected to the input end of the combustion mixer 23 through pipelines, and the burner 24 is connected to the output end of the combustion mixer 23.

[0149] In addition, a first flow control valve 25 is provided on the connecting pipe between the combustion gas cylinder 21 and the combustion mixer 23, and a second flow control valve 26 is provided on the connecting pipe between the combustion aid cylinder and the combustion mixer 23. The flow rates of the combustion gas and the combustion aid can be adjusted by the first flow control valve and the second flow control valve, thereby controlling the combustion heat of the burner.

[0150] The burner 24 and the combustion mixer 23 are connected by a flexible hose. A support rotation mechanism 27 for controlling the burner's rotation angle is located below the burner 24. This connection facilitates adjustment of the burner's rotation angle without affecting the delivery of the combustion mixture. Furthermore, controlling the burner's rotation via the support rotation mechanism allows for adjustment of the burner's rotation angle, thus adjusting the direction of the combustion flame and ensuring the foam curtain receives constant heat radiation. Specifically, the support rotation mechanism can be a fire monitor with both elevation and horizontal rotation capabilities. The burner is mounted on the support rotation mechanism, and it can swing according to the movement of the marked section of the foam curtain, ensuring the burner's flame direction is directly aligned with the center of the marked section. The burner 24 includes a conical shell with several evenly arranged combustion nozzles on its outer end face, increasing the heat radiation area.

[0151] The aforementioned combustion cylinder 21 stores combustion gas, which is a high-calorific-value fuel, such as dicyandiylacetylene.

[0152] The aforementioned combustion accelerant bottle 22 contains a combustion accelerant, which is ozone.

[0153] The specific structure of the motion capture system 3 described above is as follows:

[0154] The motion capture system 3 described above includes several cameras 31, which are respectively arranged on the front, back, top and bottom of the foam curtain, and two cameras 31 are provided on the front, back, top and bottom of the foam curtain.

[0155] In addition, the foam curtain generation and performance characterization device provided in this embodiment also includes a control system, and the burner, the first flow control valve, the second flow control valve, the support rotation mechanism and the camera are all connected to the control system.

[0156] Specifically, the aforementioned control system includes a control module, a data acquisition module, and a processor;

[0157] The aforementioned control module is used to control the burner's on / off state, the burner's flame direction, and the flow rate of the first and second flow control valves.

[0158] The aforementioned acquisition module is used to acquire image information captured by the camera;

[0159] The processor described above is used to receive and process the image information acquired by the acquisition module.

[0160] Based on the aforementioned foam curtain generation and performance characterization device, this embodiment tests the thermal insulation performance of the foam curtain, including the following steps:

[0161] (1) Place the foam mixture in the foam mixture tank, turn on the pump, and at the same time turn on the burner and ignite to form a high-temperature flame.

[0162] (2) Add color indicator to the feed trough above the venturi tube. The color indicator enters part of the foam mixture and is sprayed through the foam curtain sprayer to form a marked section foam curtain with color indicator. During the spraying process, the marked section foam curtain receives high-intensity heat radiation generated by the high-temperature flame of the burner.

[0163] In this step, during the process of using a burner to radiate heat onto the marked section of foam curtain, the flame direction is adjusted by a support rotation mechanism according to the test requirements, and the flow rates of combustion gas and combustion aid are adjusted by a first flow control valve and a second flow control valve, thereby adjusting the flame heat.

[0164] (3) Cameras around the marked section of the foam curtain acquire images of the foam curtain in real time. The control system acquires and processes the images captured by the cameras to calculate the thermal insulation performance of the foam curtain. The formula for calculating the thermal insulation performance of the foam curtain is:

[0165] Q = V1 / T*V

[0166] Where V is the initial ejection volume of the marked section foam curtain, V1 is the volume of the marked section foam curtain before landing, and T is the time from ejection to landing.

[0167] The volume of the foam curtain is calculated by analyzing the dimensions of the foam curtain based on the images acquired by the camera. The control system can analyze the length, width, thickness, and three-dimensional coordinates of the foam curtain from the images acquired by the camera to obtain the volume of the foam curtain.

[0168] In this embodiment, a low-expansion aqueous film-forming foam liquid is used, which is mixed with water, and the foaming ratio is 4 times. The foam curtain is subjected to 25 kW / m² of heat radiation during the entire spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.2 m3. The time is 14 s. Then the thermal insulation performance of the foam curtain is Q = 0.014.

[0169] Example 5

[0170] Reference Figure 1 This embodiment provides a foam curtain generation and performance characterization device, including a foam curtain spraying system 1 for generating a foam curtain, a combustion system 2 for heating the foam curtain to provide thermal radiation, and a motion capture system 3 disposed around the foam curtain to capture the movement trajectory of the foam curtain, and also includes a control system for controlling the combustion system 2 and the motion capture system 3.

[0171] The specific structure of the foam curtain spraying system 1 described above is as follows:

[0172] The aforementioned foam curtain spraying system 1 includes a foam mixture tank 11, a pump body 12, and a foam curtain sprayer 13. The pump body 12 is disposed between the foam mixture tank 11 and the foam curtain sprayer 13. The pump body 12 and the foam curtain sprayer 13 are connected by a pipe, and a Venturi tube 14 is provided on the pipe between the pump body 12 and the foam curtain sprayer 13. In addition, a feed trough 15 connected to the Venturi tube 14 is connected above the Venturi tube 14, and the feed trough 15 contains a color indicator.

[0173] In addition, the foam mixture tank 11 contains a foam mixture, which is a mixture of foam liquid and water, and the foam liquid is selected as a film-forming fluoroprotein foam liquid.

[0174] The foam curtain injector 13 mentioned above is a positive pressure foam generator.

[0175] The spray end of the foam curtain sprayer 13 is a circular spray nozzle.

[0176] The specific structure of the combustion system 2 described above is as follows:

[0177] The combustion system 2 includes a combustion gas cylinder 21, an oxidizer cylinder 22, a combustion mixer 23, and a burner 24. The combustion gas cylinder 21 and the oxidizer cylinder 22 are respectively connected to the input end of the combustion mixer 23 through pipelines, and the burner 24 is connected to the output end of the combustion mixer 23.

[0178] In addition, a first flow control valve 25 is provided on the connecting pipe between the combustion gas cylinder 21 and the combustion mixer 23, and a second flow control valve 26 is provided on the connecting pipe between the combustion aid cylinder and the combustion mixer 23. The flow rates of the combustion gas and the combustion aid can be adjusted by the first flow control valve and the second flow control valve, thereby controlling the combustion heat of the burner.

[0179] The burner 24 and the combustion mixer 23 are connected by a flexible hose. A support rotation mechanism 27 for controlling the burner's rotation angle is located below the burner 24. This connection facilitates adjustment of the burner's rotation angle without affecting the delivery of the combustion mixture. Furthermore, controlling the burner's rotation via the support rotation mechanism allows for adjustment of the burner's rotation angle, thus adjusting the direction of the combustion flame and ensuring the foam curtain receives constant heat radiation. Specifically, the support rotation mechanism can be a fire monitor with both elevation and horizontal rotation capabilities. The burner is mounted on the support rotation mechanism, and it can swing according to the movement of the marked section of the foam curtain, ensuring the burner's flame direction is directly aligned with the center of the marked section. The burner 24 includes a conical shell with several evenly arranged combustion nozzles on its outer end face, increasing the heat radiation area.

[0180] The aforementioned combustion cylinder 21 stores combustion gas, which is a high-calorific-value fuel, such as dicyandiylacetylene.

[0181] The aforementioned combustion accelerant bottle 22 contains a combustion accelerant, which is ozone.

[0182] The specific structure of the motion capture system 3 described above is as follows:

[0183] The motion capture system 3 described above includes several cameras 31, which are respectively arranged on the front, back, top and bottom of the foam curtain, and two cameras 31 are provided on the front, back, top and bottom of the foam curtain.

[0184] In addition, the foam curtain generation and performance characterization device provided in this embodiment also includes a control system, and the burner, the first flow control valve, the second flow control valve, the support rotation mechanism and the camera are all connected to the control system.

[0185] Specifically, the aforementioned control system includes a control module, a data acquisition module, and a processor;

[0186] The aforementioned control module is used to control the burner's on / off state, the burner's flame direction, and the flow rate of the first and second flow control valves.

[0187] The aforementioned acquisition module is used to acquire image information captured by the camera;

[0188] The processor described above is used to receive and process the image information acquired by the acquisition module.

[0189] Based on the aforementioned foam curtain generation and performance characterization device, this embodiment tests the thermal insulation performance of the foam curtain, including the following steps:

[0190] (1) Place the foam mixture in the foam mixture tank, turn on the pump, and at the same time turn on the burner and ignite to form a high-temperature flame.

[0191] (2) Add color indicator to the feed trough above the venturi tube. The color indicator enters part of the foam mixture and is sprayed through the foam curtain sprayer to form a marked section foam curtain with color indicator. During the spraying process, the marked section foam curtain receives high-intensity heat radiation generated by the high-temperature flame of the burner.

[0192] In this step, during the process of using a burner to radiate heat onto the marked section of foam curtain, the flame direction is adjusted by a support rotation mechanism according to the test requirements, and the flow rates of combustion gas and combustion aid are adjusted by a first flow control valve and a second flow control valve, thereby adjusting the flame heat.

[0193] (3) Cameras around the marked section of the foam curtain acquire images of the foam curtain in real time. The control system acquires and processes the images captured by the cameras to calculate the thermal insulation performance of the foam curtain. The formula for calculating the thermal insulation performance of the foam curtain is:

[0194] Q = V1 / T*V

[0195] Where V is the initial ejection volume of the marked section foam curtain, V1 is the volume of the marked section foam curtain before landing, and T is the time from ejection to landing.

[0196] The volume of the foam curtain is calculated by analyzing the dimensions of the foam curtain based on the images acquired by the camera. The control system can analyze the length, width, thickness, and three-dimensional coordinates of the foam curtain from the images acquired by the camera to obtain the volume of the foam curtain.

[0197] In this embodiment, the foam liquid is a film-forming fluoroprotein foam liquid, mixed with water, with a foaming ratio of 8 times. The foam curtain is subjected to 10 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.6 m3. The time is 15 s. Then the thermal insulation performance of the foam curtain is Q = 0.04.

[0198] Example 6

[0199] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 8 times. The foam curtain is subjected to 15 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.5 m3. The time is 15 s. Then the thermal insulation performance of the foam curtain is Q = 0.033.

[0200] Example 7

[0201] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 8 times. The foam curtain is subjected to 20 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.38 m3. The time is 15 s. Then the thermal insulation performance of the foam curtain is Q = 0.025.

[0202] Example 8

[0203] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 8 times. The foam curtain is subjected to 25 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.26 m3. The time is 15 s. Then the thermal insulation performance of the foam curtain is Q = 0.017.

[0204] Example 9

[0205] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 12 times. The foam curtain experiences 10 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.66 m3. The time is 16 s. Then the thermal insulation performance of the foam curtain is Q = 0.041.

[0206] Example 10

[0207] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 12 times. The foam curtain experiences 15 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.56 m3. The time is 16 s. Then the thermal insulation performance of the foam curtain is Q = 0.035.

[0208] Example 11

[0209] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 12 times. The foam curtain is subjected to 20 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.44 m3. The time is 16 s. Then the thermal insulation performance of the foam curtain is Q = 0.028.

[0210] Example 12

[0211] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 12 times. The foam curtain experiences 25 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.32 m3. The time is 16 s. Then the thermal insulation performance of the foam curtain is Q = 0.02.

[0212] Example 13

[0213] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 16 times. The foam curtain is subjected to 10 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.6 m3. The time is 17 s. Then the thermal insulation performance of the foam curtain is Q = 0.035.

[0214] Example 14

[0215] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 16 times. The foam curtain is subjected to 15 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.5 m3. The time is 17 s. Then the thermal insulation performance of the foam curtain is Q = 0.029.

[0216] Example 15

[0217] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 16 times. The foam curtain is subjected to 20 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.38 m3. The time is 17 s. Then the thermal insulation performance of the foam curtain is Q = 0.022.

[0218] Example 16

[0219] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 16 times. The foam curtain is subjected to 25 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.26 m3. The time is 17 s. Then the thermal insulation performance of the foam curtain is Q = 0.015.

[0220] Example 17

[0221] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 20 times. The foam curtain is subjected to 10 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.54 m3. The time is 18 s. Then the thermal insulation performance of the foam curtain is Q = 0.03.

[0222] Example 18

[0223] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 20 times. The foam curtain experiences 15 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.44 m3. The time is 18 s. Then the thermal insulation performance of the foam curtain is Q = 0.024.

[0224] Example 19

[0225] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 20 times. The foam curtain is subjected to 20 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of foam curtain is 1 m3, and the marked section of foam curtain before landing is 0.32 m3. The time is 18 s. Then the thermal insulation performance of the foam curtain is Q = 0.017.

[0226] Example 20

[0227] The difference between this embodiment and Embodiment 5 is that in this embodiment, a low-expansion aqueous film-forming foam liquid is used and mixed with water, with a foaming ratio of 20 times. The foam curtain is subjected to 25 kW / m² of heat radiation throughout the spraying process. 2 A foam curtain is sprayed horizontally. The initial marked section of the foam curtain is 1 m3, and the marked section of the foam curtain before landing is 0.2 m3. The time is 18 s. Then the thermal insulation performance of the foam curtain is Q = 0.011.

[0228] It should be noted that any parts not mentioned in this invention can be achieved by using or referencing existing technologies.

[0229] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A device for generating and characterizing the performance of a foam curtain, characterized in that, It includes a foam curtain spraying system for generating a foam curtain, a combustion system for heating the foam curtain, and a motion capture system set around the foam curtain to capture the movement trajectory of the foam curtain. The foam curtain spraying system includes a foam mixture tank, a pump body, and a foam curtain sprayer. The pump body is located between the foam mixture tank and the foam curtain sprayer, and the pump body and the foam curtain sprayer are connected by a pipeline. The combustion system includes a combustion gas cylinder, a combustion accelerator cylinder, a combustion mixer, and a burner. The combustion gas cylinder and the combustion accelerator cylinder are respectively connected to the input end of the combustion mixer through pipelines, and the burner is connected to the output end of the combustion mixer.

2. The foam curtain generation and performance characterization device according to claim 1, characterized in that, A Venturi tube is installed on the pipe between the pump body and the foam curtain sprayer.

3. The foam curtain generation and performance characterization device according to claim 2, characterized in that, The venturi tube is connected to a feed trough at the top, and the feed trough contains a color indicator.

4. The foam curtain generation and performance characterization device according to claim 1, characterized in that, The foam curtain injector is either a positive pressure foam injector or a negative pressure foam injector.

5. The foam curtain generation and performance characterization device according to claim 1, characterized in that, The spray nozzle of the foam curtain sprayer is either a circular nozzle or a flat nozzle.

6. The foam curtain generation and performance characterization device according to claim 1, characterized in that, A first flow control valve is installed on the connecting pipe between the combustion gas cylinder and the combustion mixer, and a second flow control valve is installed on the connecting pipe between the combustion aid cylinder and the combustion mixer.

7. The foam curtain generation and performance characterization device according to claim 1, characterized in that, The burner and the combustion mixer are connected by a hose, and a support rotation mechanism for controlling the rotation angle of the burner is provided below the burner.

8. The foam curtain generation and performance characterization device according to claim 1, characterized in that, The burner includes a conical shell, and a plurality of uniformly arranged combustion nozzles are provided on the outer end face of the conical shell.

9. The foam curtain generation and performance characterization device according to claim 1, characterized in that, The motion capture system includes several cameras, which are respectively arranged on the front, back, top and bottom of the foam screen.

10. The foam curtain generation and performance characterization device according to claim 9, characterized in that, At least two cameras are installed on the front, back, top, and bottom of the foam curtain.

11. A foam curtain generation and performance characterization device according to any one of claims 1-10, characterized in that, It also includes a control system, in which the burner, the first flow control valve, the second flow control valve, the support rotation mechanism, and the camera are all connected to the control system.

12. A method for characterizing the performance of a foam curtain, utilizing the foam curtain generation and performance characterization apparatus according to any one of claims 1-11, characterized in that, Including the following steps: (1) Place the foam mixture in the foam mixture tank, turn on the pump, and at the same time turn on the burner and ignite to form a high-temperature flame. (2) Add color indicator to the feed trough above the venturi tube. The color indicator enters part of the foam mixture and is sprayed through the foam curtain sprayer to form a marked section foam curtain with color indicator. During the spraying process, the marked section foam curtain receives high-intensity heat radiation generated by the high-temperature flame of the burner. (3) The camera around the marked section foam curtain acquires images of the marked section foam curtain in real time, the control system acquires the images collected by the camera and processes them, and calculates the heat insulation performance of the foam curtain.

13. A method for characterizing the performance of a foam curtain according to claim 12, characterized in that, In step (2), during the process of using a burner to radiate heat to the marked section foam curtain, the flame direction is adjusted by a support rotation mechanism according to the test requirements, and the flow rates of combustion gas and combustion aid are adjusted by a first flow control valve and a second flow control valve, thereby adjusting the flame heat.

14. A method for characterizing the performance of a foam curtain according to claim 12, characterized in that, The formula for calculating the thermal insulation performance of the foam curtain in step (3) is as follows: Q = V1 / T*V Where V is the initial ejection volume of the marker segment foam curtain, V1 is the volume of the marker segment foam curtain before landing, and T is the time from ejection to landing.

15. The application of the foam curtain generation and performance characterization device as described in any one of claims 1-11 in the process of testing the thermal insulation effect of foam curtains.

Images