Multi-mode adjustable fire-fighting foam curtain spraying and testing device

Abstract

The invention relates to a multi-mode adjustable fire-fighting foam curtain jetting and testing device which comprises a storage tank, a foam curtain generating device, a foam monitor, a jetting head, a foam collecting device and a foam thickness testing device, the foam collecting device and the foam thickness testing device are matched, the foam curtain generating device is connected with the storage tank and the foam monitor through pipelines, and the foam monitor is fixedly connected with the jetting head. Different foam output pipelines are connected with different types of foam cannons, so that a low-multiple mode, a medium-multiple mode and a snowstorm mode can be conveniently and quickly switched, and fire extinguishing or foam performance testing can be carried out in different foam spraying modes. During testing, the foam collecting device and the foam thickness testing device are arranged in front of the injector head, and performance parameters such as heat insulation and fire resistance, thickness and the like of foam can be tested. According to the invention, diversified spraying of foam shapes is realized, multiple functions of foam thickness measurement, heat insulation performance test, data recording and the like are integrated, and fire extinguishing and test requirements in different scenes are met.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting and emergency response, and in particular to a multi-mode adjustable fire fighting foam curtain spraying and testing device. Background Art

[0002] Foam has the characteristics of strong adhesion, slow flow, and rapid expansion in volume. It can cover the surface of the flame to isolate oxygen and achieve fire extinguishing. Therefore, foam fire extinguishing equipment has become a commonly used fire extinguishing technology at this stage. It has been widely used in many industrial production facilities and civil facilities, such as substations, hazardous materials warehouses, garages, hangars, chemical plants, petrochemical enterprises, metallurgical enterprises, etc.

[0003] On the one hand, traditional foam firefighting devices (such as foam fire hoses) often suffer from poor foaming effectiveness, large kinetic energy loss, short spray distance, and bulky equipment. Furthermore, they often rely on traditional low- or medium-expansion foam systems, resulting in insufficient spray distance and uneven foam thickness, making them unable to meet the firefighting and heat insulation requirements of specialized environments. Furthermore, existing foam tip release and mixing mechanisms are relatively simple, resulting in uneven foam dispersion and impacting firefighting effectiveness.

[0004] On the other hand, in actual fire emergency scenarios, fire foam extinguishing devices mainly extinguish fires by spraying foam. The foam covering the fire source plays multiple roles such as isolating oxygen and cooling the fire. The thickness of the foam sprayed by the fire foam extinguishing device and the thermal insulation performance of the foam determine the fire extinguishing efficiency. Therefore, systematic testing and evaluation of the performance of the foam fire extinguishing device are particularly important for monitoring and evaluating the fire fighting efficiency and fire emergency response capabilities. At present, the performance testing of foam fire extinguishing devices usually relies on manual operation, which is not only inefficient but also difficult to ensure the accuracy and comprehensiveness of the test results. In addition, the existing manual detection methods are prone to problems such as pipe blockage, foam deterioration, and insufficient foam fire extinguishing time when the foam fire extinguishing device is in long-term operation. More importantly, the functions of the existing testing devices are relatively single and cannot systematically evaluate key parameters such as the thickness, flow rate, and thermal insulation performance of the foam fire extinguishing device, which limits the technical optimization and performance evaluation of the foam fire extinguishing device.

[0005] In summary, there is an urgent need to develop a new type of fire foam curtain spraying and testing device to improve the foaming effect and increase the spraying distance, thereby improving the fire extinguishing efficiency while reducing the weight of the equipment, and accurately and comprehensively testing and evaluating the various properties of the foam. Summary of the Invention

[0006] One of the purposes of the present invention is to overcome the above-mentioned problems existing in the prior art and provide a multi-mode adjustable fire foam curtain spraying device, comprising: Storage tank, mainly used to store foam mixture; A foam curtain generating device is connected to the storage tank and is used to receive the foam mixture pumped from the storage tank and generate a large amount of foam; a parallel output pipeline connected to the foam curtain generating device and configured to output the foam generated by the foam curtain generating device in different modes; A foam spraying device is connected to a parallel output pipeline and can freely switch the output pipeline, and is used for spraying outward at any angle to form a foam curtain.

[0007] In the above solution, the number of storage tanks is 1 or more (such as 2, 3, 4, 5, etc.).

[0008] In the case of multiple tanks, these tanks are connected in parallel to the foam curtain generator via input pipes, and each tank stores the same or different foam mixtures. This design facilitates the storage of foam liquid in different areas and its on-demand use, helping to improve firefighting or testing effectiveness.

[0009] In the above solution, the parallel output pipeline includes 2-5 branches, and at least two groups of these branches have different foam flow rates, for example, the lowest branch has a flow rate of 8 L / s, and the highest branch has a flow rate of 20 L / s.

[0010] In the above solution, the foam spraying device includes a foam cannon and a spray head. The foam cannon is connected to at least one branch of the parallel output pipeline and can be freely switched between the branches. The spray head is connected to the foam cannon.

[0011] In the above solution, the foam cannon includes one or more (such as 2, 3, etc.) low-expansion foam guns, medium-expansion foam guns or blizzard foam cannons.

[0012] In the above solution, the spray head is divided into a hollow section, a flow guide section, and an adjustment section along the foam flow direction. The hollow section is fixedly connected to the foam monitor via a clamp. Adjusting the clamp position changes the exposed length of the hollow section, thereby varying the amount of air mixed in and thus controlling the foam shape.

[0013] In the above solution, a stainless steel mesh or porous ceramic plate with a pore size of 0.5-2 mm is placed inside the hollow section. The stainless steel mesh or porous ceramic plate can move linearly within the hollow section. By using stainless steel mesh or porous ceramic plates with different mesh sizes, the foam shape can also be controlled.

[0014] In the above solution, the diameter of the guide section is the same as the diameter of the foam monitor's nozzle, and the length of the guide section is equal to the diameter of the foam monitor's nozzle.

[0015] In the above solution, the outlet shape of the adjustment section is rectangular, and the aspect ratio of the rectangle is 2:1-4:1, and the length of the adjustment section is 1-2 times the length of the rectangle.

[0016] A second object of the present invention is to provide a testing device that is compatible with a multi-mode adjustable fire foam curtain spraying device, and the testing device includes a foam collecting device and a thickness testing device.

[0017] In the above solution, the foam collection device is specifically a container with an open top. The container's top opening is equipped with a deflector plate and a guide vane. Opposing sides of the container (e.g., front and back or left and right sides) are formed with a wire mesh or porous plate. The deflector plate and guide vane are primarily used to guide the foam downward into the container, preventing it from splashing. The wire mesh or porous plate is primarily used to apply a jet flame to the foam within the container, thereby testing the thermal insulation and fire resistance of the collected foam.

[0018] In the above scheme, the thickness testing device includes two movable plates and a platform. The two movable plates are vertically fixed to the platform and can move relative to each other in a controlled manner. The distance between the movable plates is adjusted so that the foam curtain can just pass through without colliding with the plates. This distance is the thickness of the foam curtain.

[0019] A third object of the present invention is to provide a method for using the above-mentioned multi-mode adjustable fire foam curtain spraying device, which includes a fire extinguishing method and a testing method.

[0020] The fire extinguishing method is as follows: pump the foam mixture in the storage tank to the foam curtain generating device to produce a large amount of foam, select the appropriate output pipeline and foam monitor to spray the foam from the injection head, and the foam curtain covers the fire target to achieve fire extinguishing.

[0021] The test method is as follows: pump the foam mixture in the storage tank to the foam curtain generating device to generate a large amount of foam, select the appropriate output pipeline and foam cannon to spray the foam from the injection head, use the foam collection device to collect the foam for thermal insulation and fire resistance test, and use the thickness testing device to test the thickness of the foam.

[0022] The multi-mode adjustable firefighting foam curtain spraying and testing device provided by this invention operates as follows: The foam mixture in the storage tank is pumped under pressure to the foam curtain generating device. The foam is then sprayed using the appropriate output pipeline and foam monitors as needed. The foam shape is optimized and adjusted by adjusting the spray head. Furthermore, a foam collection device and a foam thickness tester can be used to collect and intercept the sprayed foam for subsequent foam insulation performance testing and thickness measurement.

[0023] On one hand, this invention achieves multiple mixing and sufficient collision of liquid foam fire extinguishing agent and water, thereby ensuring a good foaming effect. It also optimizes the terminal release jet design, balancing range and foaming effect, thereby improving fire extinguishing efficiency. On the other hand, it enables comprehensive, accurate, and systematic testing and evaluation of key performance parameters of the foam fire extinguishing device, such as foam thickness and flow rate. Compared with existing technologies, this multi-mode adjustable fire foam curtain spray and testing device has the following significant technical advantages and beneficial effects: (1) Significantly improved fire extinguishing efficiency. Through the modular nozzle design (clamp + hollow section + diversion section + adjustment section) and multi-functional foam cannon (low / medium / high magnification mode), a foam expansion magnification of up to 60 times (medium magnification mode) is achieved, and the foam spraying distance is increased to 28 meters (low magnification mode). The air mixing ratio is adjusted by the stainless steel mesh (35 mesh / 18 mesh / 10 mesh) of the hollow section to ensure more complete foam expansion (the foaming effect is improved by more than 50%). The rectangular outlet design of the adjustment section (length R, width R / 4) enhances the coverage area of the foam, and the fire extinguishing area per unit time is increased by 30%, which greatly improves the fire extinguishing efficiency and fire extinguishing effectiveness, and achieves coverage of multiple firefighting application scenarios.

[0024] (2) Breakthrough in test accuracy and efficiency. The device of the present invention integrates a foam thickness test device (adjustable flat plate gap 0-80cm) and a foam collection device (high-temperature resistant steel wire mesh + arc-shaped guide plate). The thickness measurement error is ≤5%, and the thermal insulation performance test can simulate a 1000°C flame. The supporting test scheme makes up for the deficiency of the existing manual method in testing the thermal insulation performance of foam. In addition, the present invention uses a mechanical flat plate gap measurement method to test the foam thickness, avoiding the electronic sensor from being interfered with by foam adhesion and improving the stability of the measurement data. The arc-shaped guide plate simulates the actual spherical tank fire scene, and the correlation between the relevant test results and the actual fire extinguishing effect is over 90%.

[0025] (3) Enhanced operational convenience and adaptability. This invention utilizes a stepless speed-regulating motor (0.1-20 L / s flow rate adjustment) and a modular skid design, enabling rapid deployment and multi-angle spraying. The motor speed regulation response time is less than 1 second, and the spray head clamp can be replaced within 10 seconds. The foam flow rate can be quickly adjusted based on the fire dynamics (e.g., oil fires require high flow rates), significantly reducing the time required to switch to blizzard mode.

[0026] (4) Optimization of resources and energy consumption. The present invention adopts a corrosion-resistant alloy pump body and 316L stainless steel piping design, which extends the service life of the equipment to more than 10 years. The selected multi-stage booster pump (37kW) can increase pressure on demand rather than output constantly, so it is more energy-efficient than the traditional single-stage pump. In addition, the foam collection device is reusable, and the stable foaming enhances the coverage. In the blizzard mode, the atomized foam can reduce the amount of water used for firefighting and reduce the risk of the spread of toxic gases (such as CO and sulfur-containing smoke). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a multi-mode adjustable fire foam curtain spray and testing device.

[0028] Figure 2 This is a three-dimensional schematic diagram of a foam cannon.

[0029] Figure 3 Schematic diagram of the structure of the injection head.

[0030] Figure 4 Schematic diagram of the structure of the foam collection device.

[0031] Figure 5 Schematic diagram of the structure of the foam curtain thickness testing device.

[0032] Figure 6 This is a structural diagram of the integrated cabinet.

[0033] Figure 7 This is a schematic diagram of the structure of the door-shaped bracket of the foam curtain generating device.

[0034] Figure 8 Schematic diagram of the structure of the test nozzle and wastewater tank of the foam curtain generating device.

[0035] Figure 9 This is the construction process flow chart of the foam curtain generating device. DETAILED DESCRIPTION

[0036] To enable those skilled in the art to fully understand the technical solutions and beneficial effects of the present invention, the following is a further detailed description with reference to specific embodiments and accompanying drawings. It should be emphasized that the various embodiments listed below are merely preferred embodiments of the present invention and do not constitute any limitation of the present invention. Simple substitutions or modifications made without departing from the spirit of the present invention still fall within the scope of protection of the present invention.

[0037] The multi-mode adjustable fire foam curtain spraying and testing device provided by the present invention mainly includes a storage tank, a foam curtain generating device, a foam cannon, a spray head and a matching foam collection device and a foam thickness testing device. The foam curtain generating device is connected to the storage tank and the foam cannon through a pipeline, and the spray head is fixedly connected to the foam cannon. When a fire occurs, the raw materials in the storage tank are pressurized and pumped to the foam curtain generating device to form a large amount of foam, which is then sprayed out through the foam cannon and the spray head to cover the fire source for extinguishing the fire. Generally, the foam collection device and the foam thickness testing device are in an idle state. When it is necessary to test certain properties of the foam, it is only necessary to place the foam collection device or the foam thickness testing device in front of the spray head for testing.

[0038] like Figure 1As shown, the foam curtain generating device primarily consists of an input pipeline, a foam mixture pump, parallel output pipelines, a skid, and a control cabinet. The skid serves as the mounting base, while all other components are directly or indirectly secured to it. The entire device is then enclosed in an integrated cabinet. Specifically, the inlet of the input pipeline is connected to the storage tank via a fire hose, while the outlet is connected to the foam mixture pump. The inlet of the parallel output pipeline is connected to the foam mixture pump, while the output of the parallel output pipeline is connected to the foam monitor via a fire hose. The monitor is then connected to the spray head, thus forming a complete foam delivery pipeline. Switches or shut-off valves (such as solenoid valves) are installed on both the input and parallel output pipelines. These switches, shut-off valves, and foam mixture pumps are all connected to and controlled by the control cabinet via cables.

[0039] Figure 6 This is a schematic diagram of the integrated cabinet structure of the foam curtain generation device, with dimensions of 240cm (length) × 100cm (width) × 200cm (height). The integrated cabinet also has a water tank (80cm (length, width, height) × 100cm × 200cm, with an effective volume of 1.6m 3 The equipment includes: a multi-stage booster pump, a pressure-surge tank, a digital pressure gauge, a digital flow meter, a control cabinet, and a cooling fan. Spare components such as the test nozzle, the gate bracket, and the wastewater tank primarily serve to verify the reliability of the system during initial startup. The water tank is located between the foam mixture pump and the parallel output pipeline. Connected to the water tank are a DN50 inlet pipe, an overflow pipe, and a bottom drain ball valve. The inlet pipe is connected to the foam mixture pump and primarily receives the foam mixture and mixes it with water for foaming. The outlet of the water pipe (sealed with a DN65 butterfly valve) is connected to the parallel output pipeline for discharging the foam. The multi-stage booster pump and pressure-surge tank are connected to the water tank via water pipes. A digital pressure gauge and a digital flow meter are installed on the water pipe and, along with the cooling fan, are electrically connected to the control cabinet for data collection and recording. All water pipes and pipelines are made of 316L stainless steel seamless pipes that meet the GB / T149 standard. All switches or valves are made of 316L stainless steel. The working pressure of the pipes and valves is 5MPa.

[0040] like Figure 7 As shown, the door-shaped bracket of the foam curtain generating device is composed of three movable support rods, including two vertical inner rods and a horizontal sleeve, which are fixedly connected by screw handles. A test nozzle is installed on the crossbeam of the door-shaped bracket (i.e. the horizontal sleeve) for the initial commissioning and testing of the test device (such as the foam foaming state, the air tightness of the foam generating device pipeline and whether the operating state of each component is good). It does not affect the fire extinguishing of the foam curtain spraying device. An open wastewater pool (such as 200cm (length) × 100cm (width) × 40cm (height)) with a size of 200cm (length) × 100cm (width) × 40cm (height) is placed under the door-shaped bracket. Figure 7-8 The test nozzles are located on a 100cm wide upper opening and 80cm wide lower opening. The upper opening has a 2cm wide hem and a DN32 ball valve for drainage. The foam produced by the foam curtain generator is ejected through a pipe from a test nozzle into a wastewater tank. This is used to initially observe the foaming state of the foam mixture and the operating status of the foam generator to ensure the reliability of the foam injection.

[0041] The foam curtain generating device is designed as a pump-type, single-tube, combined distribution system. The system's design flow rate is determined by the maximum protection area and the flow rate of the operating nozzles. Key parameters include a flow rate of 0.1-60 L / s, an operating pressure of 0.1-10 MPa, and a continuous spray time of at least 1 minute. In one embodiment, the foam curtain generating device has a design flow rate (design flow rate for the maximum flow protection area) of 60 L / s, a design operating pressure of 10 MPa, a test pressure of 1 MPa, and a minimum nozzle operating pressure of 1 MPa at the most unfavorable point. To achieve this design, the foam curtain generating device utilizes a pump unit. Each main pump has a design flow rate of 60 L / s, a design pressure of 10 MPa, and a design power of 37 kW. The pump unit comes with its own control cabinet.

[0042] The storage tank is mainly used to store foam mixture, and its volume is 2m 3 Considering the potential corrosiveness of the foam mixture, the storage tank is constructed from corrosion-resistant materials and equipped with a liquid level monitoring device and a refill port. A drain port is located at the bottom of the tank, connected to the foam mixture pump via an inlet pipe. The foam mixture pump is driven by a stepless speed-regulating motor with a flow rate adjustment range of 0.1-20 L / s and a pressure adjustment range of 0.6-1.0 MPa. Similarly, the pump body is constructed from a corrosion-resistant alloy with high performance and stability, thereby extending the pump's service life.

[0043] The parallel output pipeline consists of three branches (two, four, etc., depending on the specific situation). These branches are connected to the foam mixture pump through a common pipeline. Each branch includes a 20L / s outlet and two 8L / s outlets. Each outlet is equipped with a shutoff valve and connected to the foam monitor via an internal fire-fighting connector. Connecting different foam monitors to different branches allows for switching between different spray modes, allowing for extinguishing different fires or conducting comprehensive testing of foam properties such as thickness and flow rate.

[0044] like Figure 2 As shown, the foam monitor uses a multifunctional composite fire monitor. Its front end is equipped with sensors such as a pressure gauge, flow meter, and pressure transmitter (primarily used by the control cabinet to adjust pump speed). These sensors are connected to the control cabinet via cables. The fixed base of the foam monitor can be rotated horizontally, and the spray elevation angle is adjustable.

[0045] By switching between different parallel output pipelines, the multifunctional composite fire monitor supports three modes. The design parameters of each mode are as follows: Mode 1 (Low-Expansion Mode): Connect one end of the multi-functional composite fire monitor's mount to one of the 8L / s branches of the parallel output pipeline. Connect the other end of the mount to a low-expansion foam gun via a connector, or connect two low-expansion foam guns via a diverter to form a mobile low-expansion composite foam monitor. In this mode, the foam monitor has a rated pressure of 0.6MPa, a rated flow rate of 2 x 8L / s, a range of ≥28m, and a foaming expansion of ≥16x. The dimensions of a single low-expansion foam gun are approximately 680mm x 140mm x 110mm, and it weighs ≤3.2kg.

[0046] Mode 2 (Medium Expansion Mode): Connect one end of the multi-functional composite fire monitor's mount to one of the 8L / s branches of the parallel output pipeline. Connect the other end of the mount to a medium-expansion foam gun via a connector, or connect two medium-expansion foam guns via a two-way manifold to form a mobile medium-expansion composite foam monitor. In this mode, the foam monitor has a rated pressure ≥ 0.7MPa, a rated flow rate of 2 x 8L / s, a range ≥ 16m, and an expansion factor ≥ 60. The dimensions of a single medium-expansion foam gun are approximately 450mm × 360mm × 1060mm, and it weighs ≤ 10kg.

[0047] Mode 3 (Blizzard Mode): Connect one end of the multi-functional composite fire monitor's mount to the 20L / s branch of the parallel output pipeline, and the other end to a Blizzard foam monitor, creating a mobile Blizzard foam monitor. This foam monitor is capable of extinguishing large, flowing fires. By discharging atomized water and medium-expansion aerodynamic foam from a distance, it maximizes the safety of firefighters. In this mode, the foam monitor has a water flow rate of ≥20L / s, a range of ≥25m, an elevation range of +30° to +70°, and an expansion factor of ≥20. The Blizzard foam monitor measures approximately 610mm × 340mm × 800mm and weighs ≤16kg.

[0048] The structure of the injection head is as follows Figure 3As shown, from left to right, along the direction of foam flow, the nozzle is divided into a clamp, a hollow section, a diversion section, and an adjustment section. The left side of the nozzle is fixed to the nozzle head of the foam monitor via a clamp, and the dimensions of the two must be perfectly matched. The right side of the clamp is a hollow section with only four horizontal struts. The horizontal length of the hollow section is equal to the diameter D of the nozzle head, ensuring air supply at the nozzle head. The exposed distance of the hollow section can be adjusted by adjusting the left and right position of the clamp. A stainless steel mesh is installed within the hollow section parallel to the circumference. This mesh can be moved left and right along the struts within the hollow section to ensure that the mesh remains at the nozzle head regardless of the clamp position, further adjusting the foaming state of the spray foam. The mesh is available in three pore sizes: 0.5mm (35 mesh), 1mm (18 mesh), and 2mm (10 mesh). The appropriate size should be selected based on the actual situation. In addition to stainless steel mesh, porous ceramic plates can be used to adjust the foaming effect, and multiple small storage tanks (such as 1m³×4 groups) can be connected in parallel to achieve partitioned storage and on-demand call-up of foam liquid.

[0049] To the right of the hollowed-out section is a diversion section, sized to the nozzle head and equal in length to the nozzle diameter D of the foam monitor. To the right of the diversion section is a removable adjustment section. The inlet on the left side of the adjustment section is sized to the nozzle head. By varying the shape and length (L) of the adjustment section's outlet, the foam produced forms a curtain of foam. Extensive testing has found that a rectangular outlet shape with length R = R, width R / 2, and width R / 4, and an adjustment section length (L) equal to R and 2R, produces the optimal foam curtain.

[0050] In addition to daily firefighting, when testing the performance of the fire foam curtain spraying device, it is also necessary to use Figure 4-5 The supporting test device shown.

[0051] Figure 4 This is a schematic diagram of the foam collection device, which is primarily used to collect the sprayed foam during testing. The foam collection device consists of a rectangular cabinet with an open top and pulleys at the bottom for easy movement. The cabinet can be opened in all directions to allow for the injection and discharge of foam, and the bottom panel can be removed. To better collect foam, a curved deflector (r = 0.5m) is installed on the top of the open cabinet, with matching deflector blades on both sides.

[0052] The cabinet's thickness can be flexibly adjusted between 0.05 and 0.8 meters, with a height of approximately 1.8 meters and a length of 1.2 meters. The front and back surfaces of the cabinet are clad in 1000°C temperature-resistant steel mesh. Depending on the test mode, the mesh's apertures are 2mm (10 mesh for medium-expansion foam) or 1mm (18 mesh for low-expansion foam). The remaining left and right walls of the cabinet are clad in flame-retardant, heat-insulating stainless steel. Because the foam collection device requires lightweight construction, the stainless steel and other materials used do not need to be excessively thick, ensuring a lightweight and stable structure.

[0053] During the test, a large amount of foam sprayed from the nozzle, landed on a curved deflector (simulating a spherical tank), and flowed downward along the curved surface into the cabinet. Side deflectors prevented foam splashing. After the foam was collected, a jet flame was applied perpendicular to the stainless steel mesh at the front and rear of the cabinet to test the thermal insulation and fire resistance of the foam inside the cabinet.

[0054] Figure 5 The diagram below is a structural diagram of a foam thickness test device. The foam thickness test device consists of two movable vertical plates and a horizontal fixed plate. A slide is provided on the horizontal fixed plate, and the two vertical plates can slide left and right along the slide so that the foam curtain just passes through. At this time, the thickness of the foam curtain can be obtained by measuring the distance between the two vertical plates. The vertical plates are 0.3m wide and 1m high, and the height of the horizontal fixed plate from the ground is 0.8m. Therefore, the total height of the foam thickness test device is 1.8m, and the foam thickness measurement range is 0-0.8m. The foam thickness test device is required to be lightweight and stable but cannot be knocked down by foam or jet flames. In addition, pulleys are installed at the bottom for easy movement.

[0055] The complete operating procedures of the multi-mode adjustable fire foam curtain spraying and testing device are as follows: (1) Installation and debugging of equipment Figure 9 This is a construction process flow chart for a multi-mode adjustable firefighting foam curtain spraying system. It primarily involves equipment installation and piping installation. Equipment installation includes the installation and commissioning of the pump unit, high-pressure valve box, spray head, and other equipment. Piping installation includes the installation of pipes and pipe accessories, as well as hydraulic strength testing, air pressure tightness testing, and purging of the piping system. Specifically, the storage tank, foam mixture pump, and foam monitor are fixedly mounted on the skid platform. All piping is connected and sealed. Next, the foam mixture pump, digital pressure gauge, digital flow meter, and cooling fan are connected to the electrical control system in the control cabinet. All electrical connections are checked to ensure proper function.

[0056] (2) Prepare foam mixture Prepare the foam mixture and inject it into the storage tank through the filling port, start the foam mixture pump, and check to ensure that its flow rate and pressure are within the set range.

[0057] (3) Spraying foam for fire extinguishing or testing Select the corresponding mode according to the test requirements and adjust the injection head to connect with the corresponding output pipeline, start the foam monitor to spray foam onto the foam collection device, thickness testing device or fire target for testing or fire extinguishing.

[0058] During the test, the foam thickness is measured using a foam thickness test device, and a horizontal jet flame is applied to the foam collection device to test the thermal insulation performance of the foam.

[0059] (4) Data recording and analysis Use flow meters and pressure sensors to record fire extinguishing or test data, and evaluate foam spraying effect, foam thickness, thermal insulation performance, etc. based on experimental data, and then optimize the design of equipment including the spray head to further improve its performance.

[0060] The multi-mode adjustable fire foam curtain spraying and testing device provided by the present invention has the advantages of simple structure, rich functions, flexible adjustment and precise control, and can be widely used in fire extinguishing, heat insulation protection and related fields.

Claims

1. Multi-mode adjustable fire foam curtain spraying device, characterized by: The fire-fighting foam curtain spraying device includes a storage tank for storing a foam mixture, a foam curtain generating device for receiving the foam mixture and generating foam, a parallel output pipeline for outputting foam, and a foam spraying device for spraying the foam curtain. The foam curtain generating device is connected to the storage tank, and the foam spraying device is connected to the foam curtain generating device via the parallel output pipeline and can switch between different output pipelines.

2. The fire-fighting foam curtain spraying device according to claim 1, characterized in that: The number of the storage tanks is one or more, wherein the multiple storage tanks are connected to the foam curtain generating device in a parallel manner, and the foam mixed liquid stored in each storage tank is the same or different.

3. The firefighting foam curtain spraying device according to claim 1, characterized in that: The parallel output pipeline includes 2-5 branches, wherein at least two branches have different foam flow rates.

4. The fire-fighting foam curtain spraying device according to claim 1, characterized in that: The foam spraying device comprises a foam monitor and a spray head. The foam monitor is connected to at least one branch of the parallel output pipeline and can be switched between the branches. The spray head is connected to the foam monitor.

5. The fire-fighting foam curtain spraying device according to claim 4, characterized in that: The foam cannon includes one or more low-expansion foam guns, medium-expansion foam guns or blizzard foam cannons.

6. The fire-fighting foam curtain spraying device according to claim 4, characterized in that: The injection head is divided into a hollow section, a diversion section, and an adjustment section along the liquid flow direction. The hollow section is fixedly connected to the foam monitor, and a movable stainless steel mesh or porous ceramic plate is arranged inside the hollow section. The outlet shape of the adjustment section is rectangular.

7. The fire-fighting foam curtain spraying device according to claim 6, characterized in that: The diameter and length of the diversion section are the same as the diameter of the foam monitor head, the aspect ratio of the adjustment section outlet rectangle is 2:1-4:1, and the length of the adjustment section is 1-2 times the length of the rectangle.

8. A test device for use with the multi-mode adjustable fire foam curtain spraying device according to any one of claims 1 to 7, characterized in that: The testing device includes a foam collecting device and a thickness testing device.

9. The testing device according to claim 8, wherein: The foam collection device includes a container with an open top, at which a guide plate and a guide vane are provided, and the two opposite sides of the container are made of wire mesh or porous plates; the thickness testing device includes two movable plates and a platform, and the movable plates are vertically fixed on the platform and can move relative to each other in a controlled manner.

10. A method for using a multi-mode adjustable fire foam curtain spraying device, characterized in that: The method includes a fire extinguishing method and a testing method, wherein the fire extinguishing method includes: pumping the foam mixture in the storage tank to the foam curtain generating device to generate a large amount of foam, selecting a suitable output pipeline and a foam cannon to spray the foam from the injection head, and covering the fire target with a foam curtain to achieve fire extinguishing; the testing method includes: pumping the foam mixture in the storage tank to the foam curtain generating device to generate a large amount of foam, selecting a suitable output pipeline and a foam cannon to spray the foam from the injection head, using a foam collecting device to collect the foam for thermal insulation and fire resistance test, and using a thickness testing device to test the thickness of the foam.

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