Gas-driven mechanical pumping type foam fire extinguishing system

Abstract

A gas-driven mechanical pumping type foam fire extinguishing system is provided with a compressed gas tank, a pressure water tank, a water turbine and a foam pump, inert compressed gas is used for providing pressure, water in the water tank is pressed out, and the water turbine is driven to rotate to drive the foam pump, so that efficient and stable fire extinguishing foam is generated; the water turbine drives the foam pump, efficient and accurate foam mixing is achieved, dependence on electric power or a diesel engine is avoided, and meanwhile system complexity and energy consumption are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of foam fire extinguishing, especially relates to a gas drive mechanical pump into type foam fire extinguishing system. BACKGROUND

[0002] At present, foam fire extinguishing systems are widely used in various fire scenes, including fixed, mobile and semi-fixed foam fire extinguishing systems. According to the "Building Design Fire Protection Code" (GB 50016-2014, 2022 edition revision) and "Foam Fire Extinguishing System Technical Specification" (GB 50151-2021), foam fire extinguishing systems are widely used in oil storage tanks, petrochemical plants, airport hangars and other places. Foam fire extinguishing systems usually use the following methods:

[0003] (1) Pressure type foam fire extinguishing system: relies on foam proportioning mixer, requires fire pump to provide certain pressure, structure is complex, is easily affected by power interruption.

[0004] (2) Balanced pressure system: uses a balance valve to adjust the pressure difference to achieve proportional mixing, has high energy consumption, occupies a large area, and is not suitable for emergency mobile equipment.

[0005] (3) Power driven system: relies on an electric foam pump or a diesel engine driven pump to operate, but is easily disabled in the event of power interruption or diesel shortage.

[0006] (4) Venturi injection type system: foam mixing is achieved by air suction, but the mixing ratio is inaccurate and unstable.

[0007] The invention disclosed in publication number CN107349544A discloses a mechanical pump-in type compressed gas foam fire extinguishing method, which uses a mechanical pump-in type compressed gas foam fire extinguishing device for fire extinguishing. The mechanical pump-in type compressed gas foam fire extinguishing device includes a normal pressure foam concentrate tank, a filling port, a discharge port, a fire pressure water source, a flushing and debugging pipeline, a water turbine, a foam generator, a foam delivery pipeline, a foam lance, a foam pump, and a water-foam liquid selection valve. The normal pressure foam concentrate tank is provided with a filling port, a discharge port and a water-foam liquid selection valve at the lower part. The water-foam liquid selection valve is connected with the flushing and debugging pipeline and the foam pump. The water turbine is connected with the foam pump and the fire pressure water source. The outlet of the water turbine is connected with the outlet pipeline of the foam pump after mixing, and the outlet of the foam generator is connected with the foam lance through the foam delivery pipeline. The foam is mixed with gas, and a pressure water source is required, which cannot be independent of electricity or diesel engines. SUMMARY

[0008] The utility model discloses a gas drive mechanical pump into type foam fire extinguishing system, utilize inert compressed gas to provide pressure, drive water turbine rotation to drive foam pump, generate efficient, stable fire extinguishing foam.

[0009] To solve above technical problem, the utility model adopts technical scheme of:

[0010] A gas drive mechanical pump into type foam fire extinguishing system, including compressed gas tank, pressure water tank, water turbine and foam pump, and compressed gas tank is connected with pressure water tank, and pressure water tank is connected with water turbine, and water turbine is driven connection through speed change device with foam pump, and the inlet end of foam pump is connected with foam stock solution storage tank, and the outlet end of foam pump is connected to the outlet pipeline of water turbine through the output pipe of allocation, and the foam liquid that discharges through the outlet end mixes with the fire water that flows out of the outlet pipeline to form foam mixed liquid and is transported to foam spray gun through mixed pipeline.

[0011] Test pipeline is further connected in parallel between the pressure water tank and water turbine, and a test water inlet valve is arranged on the test pipeline.

[0012] Control valves are arranged on the test pipeline and the pipelines between the pressure water tank and water turbine on both sides.

[0013] The top of the pressure water tank is further provided with a gas release valve, and the bottom is correspondingly provided with a pressure water inlet valve.

[0014] The foam pump extracts foam liquid from the foam stock solution storage tank and transports the extracted foam liquid according to a predetermined ratio.

[0015] The compressed gas tank is an inert compressed gas tank.

[0016] The utility model has the advantages of:

[0017] (1) the gas drive mechanical pump into type foam fire extinguishing system, by setting up compressed gas tank, pressure water tank, water turbine and foam pump, utilize inert compressed gas to provide pressure, press out the water in water tank, drive water turbine rotation to drive foam pump, to generate efficient, stable fire extinguishing foam, through compressed gas top pressure combination mechanical pump, water turbine drive foam pump, realize efficient accurate foam mixing, avoid the dependence on electric power or diesel engine, reduce system complexity and energy consumption at the same time.

[0018] (2) eliminate electric power dependence: through gas top pressure and water turbine mechanical linkage instead of electric power or diesel engine drive, ensure that still can normally operate under the condition of electric power interruption or no diesel supply.

[0019] (3) simplify structure design: reduce complex electronic control device, reduce maintenance difficulty and equipment cost.

[0020] (4) Improve mixing accuracy: By utilizing the volumetric mechanical properties, ensure a stable foam mixing ratio to meet the requirements of fire extinguishing effect.

[0021] (5) Reduced energy consumption: It adopts inert gas and water pressure drive, which has high energy efficiency and is particularly suitable for emergency rescue and resource-constrained scenarios. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] This utility model provides a gas-driven mechanical pump-in foam fire extinguishing system, such as... Figure 1 As shown.

[0025] A gas-driven mechanical pump-in foam fire extinguishing system includes a compressed gas tank 1, a pressurized water tank 2, a water turbine 5, and a foam pump 7. The compressed gas tank 1 is connected to the pressurized water tank 2, and the pressurized water tank 2 is connected to the water turbine 5. The water turbine 5 is driven by the foam pump 7 through a speed change device. The inlet end of the foam pump 7 is connected to a foam concentrate storage tank 8, which stores the foam concentrate for easy replenishment and maintenance. The outlet end of the foam pump 7 is connected to the outlet pipe of the water turbine 5 through an output pipe. The foam concentrate discharged from the outlet end mixes with the fire water flowing out of the outlet pipe to form a foam mixture, which is then transported to the foam spray gun 10 through a mixing pipeline 9. The foam spray gun 10 outputs uniform and efficient foam to cover the fire source.

[0026] A test pipeline is also connected in parallel between the pressure tank 2 and the turbine 5, and a test inlet valve is provided on the test pipeline. The test pipeline is connected to a test water source for system testing and debugging to ensure reliable system operation. Control valves are provided on the pipelines between the test pipeline and the pressure tanks and turbines on both sides.

[0027] The pressure tank 2 is also equipped with a vent valve 3 at the top to release gas and control pressure stability; and a pressure inlet valve 4 is correspondingly provided at the bottom for replenishing water to the tank or switching the test water source.

[0028] The foam pump 7 draws foam concentrate from the foam concentrate storage tank 8 and delivers the drawn foam concentrate according to a predetermined ratio. The foam pump 7 is connected to the foam concentrate storage tank 8, which is under normal pressure, through a suction pipe, and can draw foam concentrate from the foam concentrate storage tank 8 and deliver the drawn foam concentrate according to a predetermined ratio.

[0029] In this embodiment, in the mechanical pump-in foam fire extinguishing system, the water turbine and the foam pump are connected as one unit through a speed change device. The fire water in the pipeline drives the water turbine to operate. The water turbine is installed on the system's water supply pipeline and drives the foam pump to operate through the speed change device, coupling, hydraulic coupling, etc. The foam liquid discharged by the foam pump is input into the water turbine outlet pipeline through the discharge pipe and mixes with the fire water in the water turbine outlet pipeline to form a foam mixture with a precise mixing ratio, thereby ensuring a better fire extinguishing effect.

[0030] The compressed gas tank is an inert compressed gas tank that uses environmentally friendly gases, such as nitrogen or carbon dioxide, to provide top pressure. The pressure provided by the inert compressed gas forces the water out of the tank, driving the water turbine to rotate and drive the foam pump, thereby generating efficient and stable fire extinguishing foam.

[0031] The working principle is as follows:

[0032] (1) The compressed gas tank releases gas to the top of the water tank through the equipped pressure reducing valve to form top pressure;

[0033] (2) The water in the tank flows out under pressure and drives the water turbine to rotate;

[0034] (3) The water turbine drives the foam pump through mechanical connection to extract foam raw liquid; wherein, the water turbine and foam pump of this system are both volumetric structures, that is, the volume of liquid they transport per revolution is fixed, and the volume ratio of the two is determined and remains unchanged during the design, thereby ensuring that the foam raw liquid and water always maintain a precise ratio when mixed.

[0035] (4) Water and foam concentrate are precisely mixed at the turbine outlet to generate a stable foam mixture;

[0036] (5) The mixture is sprayed out through the fire extinguishing nozzle to cover the fire source.

[0037] The following description, in conjunction with specific examples, further illustrates the points:

[0038] Example 1

[0039] Large-scale fire scene

[0040] Suitable for large-scale fires in petrochemical enterprises, warehousing and logistics centers, etc.

[0041] System configuration: 10 cubic meter water tank, 5 kg compressed nitrogen, 300 liter foam concentrate storage tank.

[0042] The structural connection relationships are described as follows:

[0043] Connection between inert compressed gas tank and pressurized water tank: The inert compressed gas tank is connected to the top of the pressurized water tank through a pressure reducing valve. The compressed gas released through the pressure reducing valve can provide a stable top pressure for the pressurized water tank, causing the water in the pressurized water tank to flow out smoothly under pressure.

[0044] Connection between the pressure tank and the water turbine: The pressure tank is connected to the inlet end of the water turbine via a water supply pipe. The high-pressure water flow generated under the above-mentioned top pressure enters the water turbine through the water supply pipe, thereby driving the water turbine to rotate.

[0045] Connection between the water turbine and the foam pump: The water turbine drives the foam pump through a speed-changing device (coupling, hydraulic coupling, etc.). This connection method can efficiently convert the rotational motion of the water turbine into the mechanical power required to drive the foam pump.

[0046] Connection between foam pump and foam concentrate storage tank: The foam pump is connected to the foam concentrate storage tank under normal pressure through a suction pipe, which can draw foam concentrate from the tank and transport the drawn foam concentrate according to a predetermined ratio.

[0047] Connection between foam pump and turbine outlet pipe: The foam liquid discharged by the foam pump is connected to the outlet pipe of the turbine through the foam output pipe, so that the foam liquid and the fire water flowing out from the turbine outlet are fully mixed in the pipe to form a uniform foam mixture.

[0048] Connection of the foam mixture delivery system: The formed foam mixture is delivered to the foam spray gun through the foam mixing pipeline, and finally sprayed out from the nozzle of the foam spray gun to cover the fire source, thereby achieving the function of fire extinguishing.

[0049] Auxiliary equipment connections: The compressed gas tank is connected to the pressure water tank via pipeline, and gas release is controlled by the compressed gas tank's vent valve. Operating the vent valve releases gas from the tank, creating conditions for refilling or maintenance. The pressure water tank is equipped with an inlet valve for replenishing water. A test water source inlet valve is installed on the pipeline to ensure system functionality. The turbine is equipped with a maintenance valve for easy disconnection of the water supply line during system maintenance.

[0050] Workflow:

[0051] Open the compressed gas valve, and pressurized gas is injected into the water tank; 10 cubic meters of water flow out under pressure, driving the water turbine, which in turn drives the foam pump in proportion; the foam pump extracts the foam concentrate in a set ratio, mixes it with water, and generates a foam mixture; the foam is sprayed through nozzles to cover the fire source.

[0052] Example 2

[0053] Small-scale fire scene

[0054] Suitable for fires in residences, vehicles, or small computer rooms.

[0055] System configuration: 1 cubic meter water tank, 1 kg compressed nitrogen, 30 liter foam concentrate storage tank.

[0056] The structural connection relationship is the same as in Example 1.

[0057] Workflow:

[0058] Open the compressed gas valve, and pressurized gas is injected into the water tank; 1 cubic meter of water flows out and drives a small water turbine, which in turn drives a foam pump; the foam pump extracts the foam concentrate in proportion and mixes it with water to generate foam; the foam is sprayed through nozzles to cover the fire source.

[0059] This gas-driven mechanical pump-in foam extinguishing system avoids the limitations of traditional electric or diesel engine-driven systems by using gas pressure and mechanical linkage. Its simple and reliable structure, low energy consumption, and strong adaptability make it a highly efficient and environmentally friendly foam extinguishing solution. It is highly efficient and reliable: requiring no electric or diesel engine drive, relying on mechanical linkage to complete the extinguishing process; it provides precise mixing: the mixing ratio is accurate and can be flexibly adjusted according to needs; it has a simple and reliable structure, low maintenance costs, and is suitable for various fire extinguishing scenarios; it is widely applicable: the inert gases (such as nitrogen and carbon dioxide) are environmentally friendly and pollution-free, and can be used in petrochemical plants, power substations, and other locations; through a purely mechanical structure, it achieves automatic, efficient, and precise foam mixing extinguishing, suitable for extinguishing Class A (solid), Class B (liquid), and some Class C (gas) fires.

[0060] If this patent uses terms such as "first" and "second" to define components, those skilled in the art should know that the use of "first" and "second" is merely for the convenience of describing this utility model and simplifying the description, and the above terms have no special meaning.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0062] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and simplify 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 limiting the scope of protection of this utility model.

Claims

1. A gas-driven mechanical pump-in foam fire extinguishing system, characterized in that: It includes a compressed gas tank, a pressurized water tank, a water turbine, and a foam pump. The compressed gas tank is connected to the pressurized water tank, and the pressurized water tank is connected to the water turbine. The water turbine is driven by the foam pump through a speed change device. The inlet end of the foam pump is connected to the foam concentrate storage tank, and the outlet end of the foam pump is connected to the outlet pipe of the water turbine through an output pipe. The foam concentrate discharged from the outlet end mixes with the fire water flowing out of the outlet pipe to form a foam mixture, which is then transported to the foam spray gun through the mixing pipeline.

2. The gas-driven mechanical pump-in foam fire extinguishing system according to claim 1, characterized in that: A test pipeline is also connected in parallel between the pressure tank and the turbine, and a test inlet valve is provided on the test pipeline.

3. A gas-driven mechanical pump-in foam fire extinguishing system according to claim 2, characterized in that: Control valves are installed on the test pipeline and the pipelines between the pressure tanks and the turbines on both sides.

4. A gas-driven mechanical pump-in foam fire extinguishing system according to any one of claims 1 to 3, characterized in that: The pressure tank is also equipped with a vent valve at the top and a pressure inlet valve at the bottom.

5. A gas-driven mechanical pump-in foam fire extinguishing system according to claim 4, characterized in that: The foam pump draws foam liquid from the foam concentrate storage tank and delivers the drawn foam liquid in a predetermined ratio.

6. A gas-driven mechanical pump-in foam fire extinguishing system according to claim 4, characterized in that: The compressed gas tank is an inert compressed gas tank.

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