Mixing line for compressed air foam extinguishing system

Abstract

The utility model provides a kind of mixed pipeline of compressed air foam fire extinguishing system, including air flowmeter;Air flowmeter is used to detect the air flow in compressed air foam fire extinguishing system in real time.This application embodiment increases air flowmeter in the mixed pipeline of compressed air foam fire extinguishing system, and forms flow closed-loop control with the existing water, foam flow detection, so that foam state consistency and foam performance stability can be maintained when system flow changes.

Description

Technical Field

[0001] This utility model relates to the field of fire protection technology, and in particular to a mixing pipeline for a compressed air foam fire extinguishing system. Background Technology

[0002] Compressed air foam fire extinguishing system is a new type of fire extinguishing system. It mixes water, foam liquid and compressed air in a set ratio in a closed pipeline to generate homogeneous compressed air foam. It has the characteristics of energy saving, environmental protection and high efficiency in fire extinguishing.

[0003] In related technologies, when water and foam are mixed with air in compressed air foam fire extinguishing systems, the method of calibrating the opening of air valves is used, which cannot guarantee the stability of the foam state. Utility Model Content

[0004] This invention provides a mixing pipeline for a compressed air foam fire extinguishing system. By adding an air flow meter to the mixing pipeline of the compressed air foam fire extinguishing system, a closed-loop flow control is formed together with the existing water and foam flow detection, thereby maintaining the consistency of foam state and the stability of foam performance when the system flow changes.

[0005] This utility model provides a mixing pipeline for a compressed air foam fire extinguishing system, comprising:

[0006] Air flow meter; the air flow meter is used to detect the air flow in a compressed air foam fire extinguishing system in real time.

[0007] According to the present invention, a mixing pipeline for a compressed air foam fire extinguishing system further includes:

[0008] An air flow stabilizer; the air flow stabilizer is connected to the air flow meter.

[0009] According to the present invention, a mixing pipeline of a compressed air foam fire extinguishing system is provided, wherein the foam injection pipe in the mixing pipeline has a porous structure.

[0010] According to the present invention, a mixing pipeline of a compressed air foam fire extinguishing system is provided, wherein circular holes with a radius of R are evenly distributed on the wall of the foam injection pipe.

[0011] According to the present invention, a mixing pipeline for a compressed air foam fire extinguishing system further includes:

[0012] A mixing unit; the mixing unit is used to mix water, air and foam.

[0013] According to the mixing pipeline of the compressed air foam fire extinguishing system provided by this utility model, the stirring unit includes:

[0014] Stirring fins.

[0015] According to the present invention, a mixing pipeline of a compressed air foam fire extinguishing system includes an air flow meter comprising:

[0016] Vortex flow meter.

[0017] According to the present invention, a mixing pipeline for a compressed air foam fire extinguishing system further includes:

[0018] A foam check valve; the foam check valve is connected to a foam injection pipe.

[0019] According to the present invention, a mixing pipeline for a compressed air foam fire extinguishing system further includes:

[0020] An air check valve; the air check valve is connected to an air injection pipe.

[0021] This utility model also provides a compressed air foam fire extinguishing system, including the mixing pipeline of the compressed air foam fire extinguishing system as described above.

[0022] The mixing pipeline of the compressed air foam fire extinguishing system provided by this utility model, by adding an air flow meter to the mixing pipeline of the compressed air foam fire extinguishing system, forms a flow closed-loop control together with the existing water and foam flow detection, thereby maintaining the consistency of foam state and the stability of foam performance when the system flow changes. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the mixing pipeline of the compressed air foam fire extinguishing system provided by this utility model.

[0025] Figure 2 This is a schematic diagram of the current stabilizer provided by this utility model.

[0026] Figure 3 This is a schematic diagram of the foam injection tube provided by this utility model.

[0027] Figure 4 This is a schematic diagram of the stirring fins provided by this utility model.

[0028] Figure 5This is a schematic diagram of the working principle of the mixing pipeline of the compressed air foam fire extinguishing system provided by this utility model. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] The following is combined with Figures 1-5 This invention describes the mixing pipeline of a compressed air foam fire extinguishing system.

[0031] Figure 1 This is one of the schematic diagrams of the mixing pipeline of the compressed air foam fire extinguishing system provided by this utility model, such as... Figure 1 As shown, the system includes the following:

[0032] Air flow meter; an air flow meter is used to detect the air flow in a compressed air foam fire extinguishing system in real time.

[0033] Specifically, a compressed air foam fire extinguishing system is a fire extinguishing system consisting of a compressed air system, a foam pump, a water pump, flow detection and control valves, and mixing pipes. It generates foam by mixing water, foam liquid, and compressed air for fire extinguishing.

[0034] In current compressed air foam extinguishing systems, the mixing of water-foam solution and air is achieved by calibrating the air valve opening. However, during actual spraying, the flow rate of the water-foam solution varies, and the air flow is an open loop without detection or control. Changes in the number of CAFS (Compressed Air Foam Fire Extinguishing System) nozzles can alter the foam spraying effect, failing to guarantee foam stability. Furthermore, existing technologies often employ disparate components for structural assembly and modular piping, resulting in poor manufacturability and integration. This makes it difficult to ensure consistent sensor installation requirements, leading to insufficient system stability and introducing significant uncertainties during later system commissioning.

[0035] To solve the above problems, such as Figure 1As shown in the embodiment of this application, by adding an air flow meter to the mixing pipeline of the compressed air foam fire extinguishing system, real-time air flow detection and control can be achieved. Optionally, if the detected air flow is below a threshold, the operator can increase the opening of the air inlet valve; if the detected air flow is above the threshold, the operator can decrease the opening of the air inlet valve, thereby ensuring the stability of the gas-liquid ratio and the performance of the sprayed foam. In other words, by adding an air flow detection function to the mixing pipeline of the compressed air foam fire extinguishing system, this application forms a closed-loop flow control system together with existing water and foam flow detection, maintaining consistent foam state and stable foam performance even when the system flow changes. Furthermore, the mixing pipeline of the compressed air foam fire extinguishing system in this application has a high degree of integration, offering better manufacturability than existing systems, ensuring the structural requirements of each sensor, and facilitating final commissioning.

[0036] For example, staff can read the air flow sensor values ​​and adjust the air output of the air compression system in real time, so that the three-component flow control of the entire system forms a closed loop, thereby ensuring the stability of the sprayed foam performance when the flow rate changes.

[0037] In the above embodiments, by adding an air flow meter to the mixing pipeline of the compressed air foam fire extinguishing system, a flow closed-loop control is formed together with the existing water and foam flow detection, so that the consistency of foam state and the stability of foam performance can be effectively maintained even when the system flow changes.

[0038] In some embodiments, the hybrid piping further includes:

[0039] Air flow stabilizer; connection between air flow stabilizer and air flow meter.

[0040] Specifically, such as Figure 2 As shown in the embodiment of this application, connecting a flow stabilizer at the inlet end of the air flow meter can effectively reduce the influence of turbulence on the flow meter signal, effectively shorten the pipeline length, and improve the accuracy of air flow detection results.

[0041] In the above embodiments, by connecting a flow stabilizer at the inlet of the air flow meter, the influence of turbulence on the flow meter signal is reduced, thereby improving the accuracy of the air flow detection results.

[0042] In some embodiments, the foam injection pipe in the mixing pipeline has a porous structure.

[0043] Specifically, such as Figure 3 As shown in the embodiment of this application, the foam injection pipe in the mixing pipeline has a porous structure, which can effectively increase the contact area between foam and water, make the foam diffusion more uniform, and ensure that the water and foam are fully mixed, thus ensuring the stable performance of the sprayed foam.

[0044] In some embodiments, circular holes with a radius of R are evenly distributed on the wall of the foam injection tube.

[0045] Specifically, such as Figure 3 As shown in the embodiment of this application, the foam injection pipe has evenly distributed circular holes with a radius of R on its wall, which can accelerate the mixing of foam, water, and air, ensuring thorough mixing of the three components and improving the injection efficiency. Optionally, the radius of the circular holes can be determined according to actual needs, and no specific limitation is made in this embodiment of the application.

[0046] In some embodiments, the hybrid piping also includes:

[0047] A mixing unit; the mixing unit is used to mix water, air, and foam.

[0048] Specifically, this application also includes a stirring structure in the mixing pipeline of the compressed air foam fire extinguishing system, so as to fully mix the three components of water, air and foam and ensure the stable performance of the sprayed foam.

[0049] In some embodiments, the stirring unit includes:

[0050] Stirring fins.

[0051] Specifically, such as Figure 4 As shown, the stirring unit in this embodiment is a stirring fin, which can fully mix the three components of water, air and foam to ensure stable performance of the sprayed foam.

[0052] In some embodiments, the air flow meter includes:

[0053] Vortex flow meter.

[0054] Specifically, due to the high air velocity, this embodiment uses a vortex flow meter to detect air flow. That is, it uses the vortex principle to measure gas flow and calculates fluid flow by detecting the frequency of the vortices generated on both sides of the non-streamlined vortex generator, effectively ensuring the accuracy of air flow detection.

[0055] In some embodiments, the hybrid piping also includes:

[0056] Foam check valve; connection between foam check valve and foam injection pipe.

[0057] Specifically, in this embodiment, a one-way valve and a foam injection pipe are connected to prevent foam from flowing back into the pipeline when the system is shut down, thus ensuring the safety and performance of the compressed air foam fire extinguishing system.

[0058] In some embodiments, the hybrid piping also includes:

[0059] Air check valve; air check valve and air injection pipe connection.

[0060] Specifically, in this embodiment, a one-way valve and an air injection pipe are connected to prevent air from flowing back into the pipeline when the system is shut down, thus ensuring the safety and performance of the compressed air foam fire extinguishing system.

[0061] For example, such as Figure 5 As shown, this application introduces an air flow detection function. The compressed air foam system can read the water flow sensor value and adjust the air output of the air compression system in real time, so that the three-component flow control of the entire system forms a closed loop, thereby ensuring the stability of the sprayed foam performance when the flow rate changes.

[0062] Optionally, the compressed air foam system three-component mixing pipeline in this embodiment integrates an air flow meter, an air flow regulating valve, a water flow meter, a water flow regulating valve, a foam check valve, an air check valve, an air flow stabilizer, and stirring fins, so that the three components of water, air, and foam are fully mixed, effectively ensuring the stable performance of the sprayed foam.

[0063] Optionally, due to the high air velocity, this embodiment employs a vortex flow meter for air flow detection. This utilizes the vortex principle to measure gas flow, calculating the fluid flow rate by detecting the frequency of vortices generated on both sides of a non-streamlined vortex generator, effectively ensuring the accuracy of air flow detection. Optionally, in this embodiment, a paddlewheel flow meter is used for water flow measurement; it is small in size and low in cost. The paddlewheel flow meter's center is the paddlewheel, a rotating instrument with blades, propelled by the liquid flow. Its speed increases with the flow rate. The paddle has a metal magnetic head, which is detected by an electromagnetic induction sensor. The number of magnetic head signals per unit time can be converted into a flow velocity value. The pipe area can be measured and converted into a flow rate value through calculation. The three-component mixing pipeline of the compressed air foam fire extinguishing system in this embodiment allows adjustment of the foam pump speed and air compressor inlet valve opening according to the required foam ratio and gas-liquid ratio, thereby obtaining the required three-component fluid and improving the performance of the sprayed foam.

[0064] Optionally, in this embodiment of the application, when the water flow rate is detected to be too low, the speed of the fire pump is increased so that the water flow rate reaches the system set value; when the foam ratio is detected to be too low, the speed of the foam pump is increased so that the foam flow rate reaches the system set value; when the gas flow rate and gas-liquid ratio are detected to be too low, the opening of the air inlet valve is increased so that the gas flow rate reaches the system set value; thereby fully mixing the three components of water, air and foam, effectively ensuring the stable performance of the sprayed foam.

[0065] Optionally, this application also provides a compressed air foam fire extinguishing system, including the mixing pipeline of the compressed air foam fire extinguishing system in any of the above embodiments.

[0066] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mixing pipeline for a compressed air foam fire extinguishing system, characterized in that, include: Air flow meter; the air flow meter is used to detect the air flow in a compressed air foam fire extinguishing system in real time.

2. The mixing pipeline of the compressed air foam fire extinguishing system according to claim 1, characterized in that, The hybrid piping also includes: An air flow stabilizer; the air flow stabilizer is connected to the air flow meter.

3. The mixing pipeline of the compressed air foam fire extinguishing system according to claim 1, characterized in that, The foam injection pipe in the mixing pipeline has a porous structure.

4. The mixing pipeline of the compressed air foam fire extinguishing system according to claim 3, characterized in that, The foam injection tube has evenly distributed circular holes with a radius of R on its wall.

5. The mixing pipeline of the compressed air foam fire extinguishing system according to any one of claims 1-4, characterized in that, The hybrid pipeline also includes: A mixing unit; the mixing unit is used to mix water, air and foam.

6. The mixing pipeline of the compressed air foam fire extinguishing system according to claim 5, characterized in that, The stirring unit includes: Stirring fins.

7. The mixing pipeline of the compressed air foam fire extinguishing system according to any one of claims 1-4, characterized in that, The air flow meter includes: Vortex flow meter.

8. The mixing pipeline of the compressed air foam fire extinguishing system according to any one of claims 1-4, characterized in that, The hybrid pipeline also includes: A foam check valve; the foam check valve is connected to a foam injection pipe.

9. The mixing pipeline of the compressed air foam fire extinguishing system according to any one of claims 1-4, characterized in that, The hybrid pipeline also includes: An air check valve; the air check valve is connected to an air injection pipe.

10. A compressed air foam fire extinguishing system, characterized in that, The mixing piping of the compressed air foam fire extinguishing system as described in any one of claims 1-9.

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